JPH0219035A - Method and system for mobile body communication - Google Patents

Abstract

PURPOSE:To improve the reliability of position registration by providing respectively an ID identification memory section to each radio base station and a gate exchange. CONSTITUTION:The system is provided with plural radio base stations 30-1 to 30-n having a radio transmitter-receiver and an ID identification storage section 24, a gate exchange 20 including a switch group 23 connecting to a telephone network 10, a channel control section 21 and the ID identification storage section 24, a radio reception circuit receiving plural channels simultaneously to communicate with plural radio base stations 30-1 to 30-n while moving in the service area, a radio transmission circuit applying simultaneous transmission to plural channels and a mobile radio equipment enabling the communication with a broad band radio base station with increased respectively power. Then when a channel whose communication quality is below a prescribed value (old channel) takes place, other channel (new channel) is switched with other station among the radio base stations 30-1 to 30-n meeting prescribed communication quality. Thus, the reliability of position registration is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile communication method and system. Furthermore, the present invention relates to a communication method and system that satisfies the communication quality when the communication quality deteriorates due to movement of a mobile terminal during communication in mobile communication using a small zone configuration.

More specifically, the aim is to provide a communication method and system with excellent frequency efficiency, communication quality, wireless line control ability, location registration function, etc.

[Prior art] Generally, when performing mobile communication within a wide service area, one wireless base station covers the entire area and provides services.
The method for communicating with mobile objects within an area is called the large zone method. In contrast, the small zone method
An area is divided into multiple small areas, one wireless base station is installed in each divided area, and mobile wireless devices within each area communicate with these wireless base stations. It is.

The conventional small zone system is employed, for example, in the car telephone system of NTT (Nippon Telegraph and Telephone ■), which is currently in commercial service. In this case, the mobile radio installed in the car moves away from the radio base station of the other party as the car moves, and for example,
If the value exceeds this value, the reception input electric field value of the radio wave decreases, resulting in deterioration of call quality. Therefore, in a small zone configuration,
Wireless base stations are installed 10 to 12 floors apart from each other within the service area, so in the above case there is always another wireless base station near the current location of the car (within 5 or 6 floors), and this A separate radio channel is used between the new radio base station and the mobile radio to continue the call.

In the NTT system, a radio line control station is installed to control a large number of radio base stations and mobile radios, and the radio line control station controls the setting and cancellation of calls on radio lines. It is connected to the general telephone network through a barrier switch. At the radio network control station,
When call quality deteriorates, multiple radio base stations around the mobile radio receive the radio waves transmitted by the mobile radio, and a specific radio base station establishes a new radio channel between the mobile radio and the mobile radio. When it is determined that the desired call quality can be maintained by setting a new channel, a new channel is set between the mobile radio and the radio base station.

FIG. 11 shows a conceptual diagram of the configuration of a conventional system that operates as described above, and will be explained using this diagram.

In FIG. 11, each zone 14A, 14B, 140 degrees 14D surrounded by four circles with a radius of about 5 to 7 degrees is the service area of the car telephone, and the mobile radio device 15 installed in the car is in the zone. Wireless base station 13A within 14A
Suppose that you are communicating with Since the automobile is traveling from zone 14A to zone 14G, the relative distance between radio base station 13A and mobile radio 15 is increasing. Assuming that communication is continuing and the car moves from zone 14A to zone 14C, wireless base station 13
The distance between A and the mobile radio device 15 becomes 5 to 7 KfR or more, and the input electric field value of mutually received radio waves decreases, leading to a drop below a certain level of transmission quality.

This state of quality deterioration is constantly monitored by the radio network control station 12, and when the quality drops below a certain standard, the radio base stations 13B, 13C, and 13D in the vicinity of the radio base station 13A are A request is made to measure the quality of the radio channel (assumed to be channel C-+1) in use between the station 13A and the mobile radio 15. The wireless base stations 13B, 13C and 13D that received this request,
Each has its own radio channel searching receiver (not shown)
It tunes to channel CH1 to receive the signal, and reports its status to radio network control station 12. Upon receiving this report, the radio network control station 12 transmits the information to the radio base stations 13B, 13C,
Compare the values of the received input electric fields FB-EC- and E of 13D and Fo>FB.

EC>ED and E. When it is confirmed that a certain level of quality is ensured from the perspective of transmission quality, the radio network control station 12 considers that zone 14A has shifted to zone 14C, and changes the radio channel CH1 that was used in zone 14A. , and instead starts a procedure for using an unused channel (assuming channel CHIO) among the available radio channels at the radio base station 13C in the zone 14C, that is, switching the channel during the call.

Below are the references: “Car phone radio line control” Nippon Telegraph and Telephone Telecommunications Research Institute Research and Practical Application Report Vol.
26. No. 7 1885jiwo reference L') Please explain.

(1) The channel switching signal uses a control line included in each transmission path 16 between the radio network control station 12 and each radio base station 13, and a radio channel between each radio base station 13 and mobile radio 115. This is a call channel.

(2) A channel switching signal is sent to the mobile radio 15 from the radio base station 13A with which communication was previously performed, and a radio continuity test tone is sent from the radio base station 13C, which is currently communicating with the mobile radio. It is sent to the mobile radio device 15.

(3) When the mobile wireless wireless device 15 cannot receive the wireless continuity test tone, it returns to the old communication channel set with the wireless base station 13A and continues the conversation.

The above (1) to (3) are the channel switching methods currently used by NTT during a call, but as is clear from these explanations, the caller, i.e., the car phone user, may experience the following noises during a call. It will be mixed in. That is, (a) a control signal for switching according to (1) above (in this case, a 300 bits/second digital signal) is inserted into the active channel during the interruption of the other party's signal; Since it appears in the output of the receiver, it is mixed into the call as an audible sound of about 300 Hz, and the call is interrupted during this time.

(b) During the call test described in (2) above, there is no noise, but there is no sound, and during this period, the other party's voice is not transmitted to you, and your own voice is not transmitted to the other party (call disconnection).

The duration of call interruption due to (a) and (b) above is C.7
~C, it is said to be 8 seconds. On the other hand, the radio network control station 12
Then, the wireless base station 13C is instructed to start a conversation with the mobile wireless device 15 using, for example, channel CH10 through the transmission path 16C between the two. Since this instruction is also carried out at the same time as the continuity test described above, from this moment on, the radio base station 13A ends communication with the mobile radio device 15, and the radio base station 13C instead communicates with the mobile radio device 15. start communication. Furthermore, the radio network control station 12 is connected to the telephone network 10.
For the barrier exchange 19 that forms the interface between
A request is made to switch the channel switch SW in the gateway exchange 19 for connecting each radio base station 13 to the telephone network 10 from the radio base station 13A to 13C. That is, the A-4 switch is turned off (indicated by a blank triangle) using the communication path switch SW in FIG. 11), and the C-4 switch is turned on (indicated by a black triangle).

With the above operations, the mobile radio 15 can be used in the car to communicate with any telephone in the telephone network 10 and the car is in zone 1.
Regardless of whether the user moves to 4A, 14B, 140, or 140, the call will continue.

In this way, the user (caller) is given a technical guarantee that he or she can make a call anytime and anywhere within the service area while the car is in motion. That service is good.

Mobile communications that employ such a small zone configuration have become able to exhibit the following features that are not found in large zone systems.

(a) Effective use of frequencies through a so-called small zone configuration, in which the radio waves from one wireless base station are used only in a narrow area, and many wireless base stations are placed in the service area and the same frequency is used repeatedly. became possible.

(b) With the advent of digital synthesizers, it has become possible to switch between hundreds of radio channels on mobile radios, and the radio Since the technology for setting and controlling lines has been established, it has become possible to contribute to the effective use of frequencies in item (a).

(C) The radio channel control technology necessary to efficiently control the settings of radio channels for making and receiving calls for a large number of mobile radio devices has been established. It is now possible to switch hot wire channels during communication when changing zones during wireless communication.

[Problem to be solved by the invention] However, in the conventional system as illustrated in FIG. 11, technical measures are insufficient or no measures are taken, causing inconvenience to users. There is a problem in that it is not possible to provide a satisfactory service, and the system needs to promote more effective use of frequencies and improve serviceability.

These problems will be explained below.

) In order to make effective use of frequencies, it is necessary to reduce the zone radius of one zone in a small zone configuration.
The probability of passing through one zone and transitioning to another increases. In this case, it is frequently necessary to change the radio channel assigned to each zone during zone transition, and at this time, it is necessary to change the old radio channel to the new front channel for both radio base stations and mobile radios. occurs. Conventionally, this change was made at the radio network control station 12 (Fig. 11), but
This channel change caused temporary interruptions in communication, resulting in deterioration in communication quality.

) There was an example in which mobile radio devices with different transmission powers were introduced into the same system and operated as devices within one system. This includes, for example, a mobile wireless device installed in a car (transmission output of 5 W in the case of an NTT car phone) and a mobile wireless device that accesses a wireless base station for a car phone that the user can carry outdoors. Telephone 11 (in the case of NTT, the transmission power is 1W) are housed in the same system, but this is because the wireless equipment housed in the wireless base station can be shared, making it possible to construct an economical system. Become.

However, from the point of view of effective frequency use, it complicates the creation of rules for reusing the same frequency, which reduces the effectiveness of effective use, and the difference in transmission power levels The possibility of interference caused by other mobile radios increases. In order to prevent this, costs have increased and the effective use of frequencies has been compromised.

Reusing the same frequency can be dealt with by increasing the control capabilities, but there are limitations to this as well.
If the zoning progresses beyond a certain point, tl control becomes impossible, or the system becomes completely unprofitable in terms of cost. Interference has not been solved by conventional methods and has been a major problem in conventional systems.

Therefore, from the standpoint of effective use of frequencies, there is a limit to the effective use of frequencies, and it is impossible to meet the requirements in terms of utilizing limited radio wave resources.

iii > As the number of small zones progresses, there are many situations in which within a small zone served by one wireless base station, small zones served by an adjacent or the next adjacent wireless base station overlap, and conventional technology as a wireless line control technology If this was used, there was a possibility that it would become a control child.

This is because the radio wave propagation characteristics are subject to a large propagation loss due to the influence of topography and structures within one small zone. This influence becomes relatively large as the number of zones becomes smaller in order to effectively utilize frequencies, and the range of one small zone becomes smaller (radius of one floor or less). In addition, relatively high-level transmitters are used in the radio base stations and mobile radios used to ensure good communication even in areas affected by terrain or structures. This means that in areas where there is no influence from terrain or structures, it becomes possible for a radio base station located far away to communicate with a mobile radio device located in another zone.

Therefore, the original concept that one small zone is managed by one wireless base station and that a wide plane that is the service area is covered by many small zones disappears, and many small zones are superimposed and one It was decided to form a service area.

As a result, in order to smoothly operate a small zone system in such a state, with the conventional technology, it is necessary to frequently set up, change, and cancel the wireless communication path, which reduces the capability of the wireless line control device. The result will be significantly higher. Therefore, it is practically impossible to secure a smooth communication path, and consideration has been given to the system configuration in order to avoid such a situation.

iv) As the number of zones becomes smaller and the size of the zone handled by one radio base station becomes smaller, the frequency of location registration increases as mobile radios in a standby state move. In other words, location registration involves automatically sending a location registration signal from a mobile radio to a wireless base station when moving from a service area covered by one wireless base station to a zone covered by an adjacent wireless base station. However,
As the moving speed increases or the size of the zone decreases, the frequency of this registration signal transmission increases. Therefore, the frequency of location registration traffic increases, but no effective countermeasures have been taken in conventional systems.

As mentioned in v) and iv), as the size of the zone handled by one wireless base station becomes smaller as the size of the zone progresses, the frequency of location registration due to the movement of mobile wireless devices in standby mode will increase. To increase.

In this case, location registration involves automatically sending a location registration request signal to the wireless base station when the mobile wireless device moves to the zone covered by the adjacent wireless base station. Quite often, there is not only one but a plurality of wireless base stations that can receive this signal well.

Then, these multiple radio base stations will send response signals to the mobile radio at the same time unless special measures are taken. Since response signals from these plurality of radio base stations are simultaneously received by the mobile radio, interference occurs and accurate signal reproduction becomes impossible.

vi) When switching channels during a call when a mobile radio moves, which will be described in detail later, a new channel is sent from the mobile radio to a nearby radio base station in order to determine the communication channel in the new front zone. Quite often it occurs that there is not only one but several radio base stations responding to the signal for determining the front channel. Then, these plurality of radio base stations will send response signals to the mobile radio at the same time unless special measures are taken. Since response signals from these multiple radio base stations are received simultaneously by the mobile radio, interference occurs, and accurate signal reproduction is not performed, making channel switching impossible. happens.

vii) In mobile communications, the communication quality changes significantly due to the influence of radio wave propagation characteristics as the mobile body moves, and in places where radio waves propagate poorly, communication quality is required for the system. There were problems such as the value being below the value. In order to solve this problem, various measures such as diversity technology have been taken, but all of them have problems such as not only increasing the cost of the equipment but also impairing the effective use of frequencies.

Furthermore, call interruptions due to transition between zones during a call are considered to be a type of communication quality problem, and a solution was needed to ensure quality.

viii) No measures were taken to deal with fluctuations in communication traffic within the system.

Communication traffic fluctuations within the system, for example, are usually extremely low in public communications late at night or early in the morning, during the day around 10 a.m. and between 2 to 3 p.m., and in car telephones.
A large pile of traffic can be seen between 5 and 6 o'clock, but if the system is designed to function satisfactorily even during the peak traffic hours, the system components will be idle during off-peak hours, resulting in high costs. If a system was built that was suitable for off-peak hours, the cost would be extremely low, but it would become unusable during peak hours, which would inevitably lead to a decline in serviceability.

In addition, when communication traffic is slow, idle facilities within the system are effectively used to provide high-quality services, and as traffic increases, the system is transitioned to regular service. They lacked the concept of using it. One reason for this is considered to be that the system cost would rise sharply if attempts were made to solve this problem using conventional techniques.

Furthermore, when all the transceivers of a radio base station are in use, conventional systems do not have the processing capacity to process even extremely short and regular signals such as device registration signals made up of mobile radios. This was a technical constraint on the progress of smaller zones.

tx) Conventionally, the location registration of mobile units communicating has only been done by registering and processing data received at one wireless base station at the same time. In systems that are subject to frequent changes, or in systems where there are restrictions on the location registration method due to the effective use of frequencies, it may be impossible to receive a call to a mobile unit due to a defect in location registration.

This means that if the wireless transceiver installed at the wireless base station has only one channel, it must be used for control and communication in a time-sharing manner, and when communicating with a mobile wireless device, it must be used in the same zone. There was a significant negative impact when there was a location registration request from another mobile radio.

x) The technology for providing mobile communication services using broadband signals was insufficiently mature and incomplete, causing inconvenience to users.

Conventionally, the mobile communication services that have been widely used have mainly been telephone, and those that use wide frequency bands, such as high-speed data signals, have rarely been used. This is because in mobile communication, the radio wave propagation characteristics change significantly as the mobile body moves, so there has been a lack of technology to properly receive wideband signals.

xt) Wireless line control ability and reliability were insufficient.

Conventionally, wireless line settings, cancellations, and channel switching during a call were performed by a wireless line control station or wireless system control device that was installed to centralize control in one area within a certain area. Ta.

Although this is effective in terms of unified management of line control through centralization, if a failure occurs in this system, the entire system will go down, resulting in a fatal accident. Therefore, countermeasures such as duplication of hardware have been taken, but these have resulted in increased costs and have not produced satisfactory results.

xii) In conventional land-based mobile communications, except in special cases, the direction of movement of a mobile object during communication cannot be estimated.
It was not implemented due to technical difficulties. Therefore, it was not possible to obtain effective information such as the wireless line traffic situation in the area in the direction of movement, and problems remained in terms of effective frequency use and traffic management.

xiii) Momentary interruptions occur when switching channels during calls between zones or within a zone, and this has also been a major hindrance to creating smaller zones.

In the call channel switching method implemented by NTT, which was explained using FIG. It has the disadvantage that part of the signal (300 bits/second) is mixed in and is audible. If there is a temporary interruption in the call line or noise, it is not a big problem because it can be compensated for by listening again when the content of the call is voice, but it is not a big problem. When a facsimile terminal is installed and used for sending and receiving, if the channel is changed during operation, for example, for a 1-minute facsimile, the C, 8/60 part of the paper will appear as a black line (or white line), which will reduce the quality of the received image. The disadvantage was that it deteriorated significantly. In the case of data communication, for example, 1
In a 200 baud data signal, approximately 1000 bits of the signal are lost, so procedures such as retransmission are required.

In addition, there are methods to eliminate the annoying noise by muting the channel while switching or using out-of-band signals, but even if the purpose of eliminating the annoying noise can be achieved, the line Since there is still a downtime, the problem remains that it is completely ineffective in eliminating the negative effects on facsimile and data signals.

xiv) Mobile phones for use while carried by people are used in systems with micro-zone (microcell) configurations. However, if this mobile radio device is brought into a car and used while driving, the transmission quality of control signals deteriorates due to radio wave propagation characteristics, etc., and the problem remains that it cannot be used satisfactorily.

[Means for Solving the Problems] A plurality of radio base stations including a radio transceiver and an ID identification storage unit, a group of switches connecting the plurality of radio base stations and a telephone network, and a call path control for controlling the group of switches. a gateway exchange including an ID identification storage section and an ID identification storage section, and a radio reception system that simultaneously receives a plurality of channels in order to simultaneously communicate with a plurality of radio base stations while moving within a service area covered by the plurality of radio base stations. circuit, and a wireless transmission circuit that transmits multiple channels simultaneously, and includes a J-channel circuit for increasing transmission power.
We constructed a system that includes a mobile radio device that enables communication with a wide area radio base station.

Furthermore, if it is necessary to strengthen the communication function from mobile radio devices that are moving at high speed, the control and communication signal transmission/reception that covers the entire service area covered by multiple radio base stations, respectively. A wide-area wireless base station was installed, and the system was configured to connect this to the barrier switch via a transmission line.

[Operation] While multiple radio base stations and mobile radio devices are communicating the same communication content in parallel using multiple channels,
If a channel (old channel) whose communication quality falls below a certain value occurs, another channel that satisfies the certain communication quality
Communication with one wireless base station is switched to another channel (new channel), communication on the old channel is terminated, and the same communication content can be communicated without momentary interruption using multiple channels including the new channel. I made it. As a result, the following actions and effects could be obtained.

1) The reliability of location registration has been improved because each radio base station and barrier switch is equipped with an ID identification storage unit, and the location of mobile radio equipment is registered in parallel based on the data of each radio base station. .

ii) When executing i) above, the mobile radio transmits a location registration request signal to the radio base station, but as a radio base station that can receive this signal well, 1
It occurs quite often that there is not just one, but multiple. Then, these multiple radio base stations will send response signals to the mobile radio at the same time unless special measures are taken. Since the response signals from these plurality of radio base stations are received simultaneously by the mobile radio, interference occurs and accurate signal reproduction becomes impossible. In order to prevent this, in order to prevent interference in response signals in location registration signals transmitted to multiple wireless base stations in the vicinity, we have developed a method for transmitting response signals from multiple wireless base stations. , it was decided to take measures in advance, such as providing a time difference proportional to the received electric field value.

1ii) Since one of the 12 channels whose communication quality has deteriorated is switched to a new channel, it is possible to achieve seamless channel switching during calls between zones or within zones.

iv) When performing iii) above, respond to a signal for determining a new front channel transmitted from a mobile radio to a nearby wireless base station for determining a communication channel in a new front zone. The presence of not just one wireless base station but a plurality of wireless base stations occurs quite frequently. Then, these plurality of radio base stations will send response signals to the mobile radio at the same time unless special measures are taken. Since the response signals from these multiple radio base stations are received by the mobile radio at the same time, interference may occur, resulting in inaccurate signal reproduction and channel switching operations becoming impossible. happen. In order to prevent this, when the quality of communication with one or more wireless base stations deteriorates, one or more wireless base stations that satisfy a certain level of communication quality required by the system are used. In order to prevent interference from occurring in a response signal to a signal for determining a new front channel transmitted from the mobile radio device to a nearby radio base station in order to set up a communication path with the mobile radio device, We decided to include in advance the method for sending response signals from multiple wireless base stations.

■) Ensuring good communication quality through the adoption of economical transmitting and receiving diversity, which reduces interference and makes new services using broadband signals technically possible.

Vi) When traffic is slow, many channels are used to carry out parallel communication, which makes effective use of radio equipment and improves communication quality.

vii) Since each wireless base station is equipped with an ID identification storage unit and a function that enables simultaneous transmission and reception of multiple wireless channels through high-speed switching, it is possible to process location registration signals from mobile wireless devices even during peak traffic times. It became.

vi ti) Parallel communication of multiple channels improves the transmission characteristics of wideband signals and improves line quality.

In addition, by increasing the functionality of mobile radios, installing radio base stations (wide area radio base stations) for transmitting and receiving control signals and call signals, and using them in combination with the radio base stations, the following effects and
I was able to get the effect.

X) It has become possible to estimate the moving direction and speed of a mobile radio, and it has become possible to secure communication in the destination zone and to carry out advance allocation of channels to be used in the moving light prospect zone.

X) When the moving speed of a mobile radio device exceeds a certain value, the transmission of location registration signals is limited to wide area radio base stations,
This makes it possible to prevent congestion in control signal traffic and ensure the reliability of control signals.

xi) Regarding incoming calls to mobile radios in the state of This made it possible to secure the following.

xii) Regarding the call originating from the mobile radio in the state of It was possible to secure communication by selecting a communication channel.

xi i i) In xii) above, the paging signal sent from the wide-area radio base station to the mobile radio device includes necessary information regarding the start of a call, such as surrounding communication traffic conditions and usable call channel numbers. This made the operation of the system as a whole smoother.

xiv) By distributing the functions of radio line control from the centralized system as in conventional systems to mobile radios or radio base stations, improved control processing capacity and system reliability have been achieved.

XV) In general, when a portable radio telephone is used as the mobile radio of the present invention, its power source can be obtained from a car, and in that case, the transmission power can be increased even more when carried. This made it possible to communicate with wide-area wireless base stations.

[Embodiment] FIG. 1A, FIG. 1B, FIG. 1C, and FIG. 1D show an example of a system configuration for explaining an embodiment of the present invention.

In FIG. 1A, 10 is a general telephone network, which includes an exchange Ia11 for general telephones.

20 is a general telephone exchange 1 included in the telephone network 10
This is a gateway exchange for connecting and exchanging 11 and a wireless system. The gateway switch 20 has a plurality of wireless base stations 30-1.
30-2. −． 30-n, wide area wireless base Q17-1.
17-2. . . , 171 and many mobile radio devices and telephones accommodated in the general telephone network 10, and transmits and receives control signals between each of the radio base stations 30-1 to 30-n. At the same time, the setting of the communication path is canceled and the wide area wireless base station 17-1.17-2. ..., 17=, etc., and each radio base station 30-1 to 30-n and barrier switch 20 under the control of the communication path control section 21.
and a switch group 23 necessary for switching a communication path for establishing a connection with the exchange 11.

In FIG. 1B, each non-WA base station E30-1, 302 or wide area wireless base station 17-1, 17-2°..., 17
A mobile radio 1150 is shown communicating with -r. The received signal received by the antenna section is sent to the reception mixer 63.
and a wireless receiving circuit 68 including a receiving section 53 , and the output communication signal is inputted to a control section 58 and a telephone section 59 . The communication signal output from the telephone section 59 is applied to a radio transmission circuit 66 including a transmission mixer 61 and a transmission section 51, and the transmission signal is sent out from the antenna section and transmitted by the radio base station 30 or the wide area radio base station 17. Received.

In addition, we constantly monitor the call quality during communication and if it deteriorates,
In addition to reporting it to the control unit 58, the same radio base station 3
The control unit 5 compares and measures the electric field values of signals transmitted from the wide area wireless base station 17 with a time difference.
Report to 8. A communication quality monitoring unit 57, an interference detector 62 that monitors the presence or absence of interference during communication, and reports it to the control unit 58 when interference exceeding a certain level is detected, and the own mobile radio 1150. ID, identify and remember which zone you are in
A D.Roam area information verification storage section 54 is provided with connections as shown.

This mobile radio device 50 includes a synthesizer 55-1.
．． 55-2. ..., 55-n and 56-1.56-
2. ...2.56-n and selector switch 64-1.6
4-2, and a reception switching controller 65G and a transmission switching controller 67G that generate signals for switching and controlling the changeover switches 64-1 and 64-2, respectively. ~55-n and 56-1~56
-n and both cutting sound controllers 65C and 67C are controlled by the control unit 58. Each synthesizer 55-1
A reference frequency is supplied from a reference crystal generator 71 to 55-n and 56-1 to 56-n.

The control unit 58 is provided with a signal line to a switch SW for switching the 2-way power source and a signal line from the power sensor SE that detects switching of the 2-way power source.

This 2WAY power supply is suitable for mobile phones (normal transmission power is 10
When connected to the car's power supply, the transmission output can be about the same as that of a car phone (transmission output of 1 to 10 W).

FIG. 8A shows a conceptual configuration diagram when a mobile radio device 50, which is a mobile phone, is connected to the power source of an automobile, and the mobile radio device 50 is connected to the automobile power source with a power cord having plugs P at both ends. .

FIG. 8B shows a circuit diagram of an embodiment of the power supply shown in FIG. 8A, in which a power cord having a plug P at both ends is connected to a jack J connected to a battery B2 of an automobile, and a mobile wireless device 50.
Connect to the side jack J. Here, B1 is a built-in battery when the mobile radio device 50 is used as a mobile phone, and a switch swtfi for switching the 2-way power source is used.
When the switch SW is on the b side, the battery B1 is taken out as a power source for the mobile radio 50, and when the switch SW is on the a side, the battery B2 is taken out as a power source for the mobile radio 150 through the resistor R1 for overcurrent protection. power is taken out. When the car battery B2 is connected to the mobile radio 50, the power sensor SE
detects it and sends a detection signal to the control unit 58 of the mobile radio II50. Upon receiving this detection signal, the control unit 58 sends a switching signal to the 2-way power switching switch SW to connect the switch SW to the a side, and at the same time instructs the wireless transmission circuit 66 to increase the transmission output.

Naturally, switching of this switch SW may be done by a direct instruction from the power sensor SE, or a relay switch that integrates the power sensor SE and the switch SW may be used. As the sensor, either a mechanical sensor or a semiconductor switch can be used.

FIG. 8C shows a circuit configuration in which the transmission output is greatly increased, and the transmission output is insufficient if only the transmission output of the radio transmission circuit 66 is increased. When it is not possible to communicate with the wide area wireless base station 17, the output of the transmission mixer 61 is roughly amplified by the transmission amplifier 77, and the transmission output changeover switch 79 is used to switch between the output of the transmission mixer 61 and the output of the transmission amplifier 77. It is designed so that it can be supplied to the antenna section. When the control unit 58 detects that the power source of the mobile radio 50 is connected to the battery B2 of the automobile from the power sensor SE and determines that it is necessary to significantly increase the transmission output, the control unit 58 performs transmission amplification control. By switching the transmission output selector switch 79 from the side of the transmitter 61 to the side of the transmission amplifier B77, the transmission amplifier 77 is operated, and it becomes possible to communicate with the broadband wireless base station 17 with a large transmission output.

Here, the transmission amplifier 77, the transmission amplification controller 78, and the transmission output selector switch 79 are integrated within the mobile radio 1fi50 for 3 m.
Although the case where the transmission amplifier 77, the transmission amplification controller 78 . Transmission output selector switch 7
Reference numeral 9 may be integrated with the antenna section of the vehicle, so that when the mobile phone is mounted on the vehicle, the connection is made and the mobile phone becomes operational.

FIG. 1C shows a radio base station 30 (for example, 30-1>) that communicates with the mobile radio 150, which has almost the same configuration as the mobile radio 50 shown in FIG. 1B, but has a different configuration. There are transmission and reception switching controllers 55-1 to 55-1.
55-n, 56-1 to 56-n, there is no changeover switch 64-1.64-2 for switching the synthesizer, and the ID
- There is no roam area information collation storage unit 54 (Fig. 1B), and the synthesizer is also used for reception and transmission 35-1.36-
■D identification storage unit 34 for identifying and storing the ID numbers of the self and the called party.
, has no telephone section 59 (FIG. 1B), and has no telephone section 59 (FIG. 1B).
Interface 3 to barrier switch 20 which replaces 9
9 is provided.

Each component corresponding to FIG. 1C and FIG. 1B will be listed below, and description of each function will be omitted. Here, the numbers in parentheses are the numbers of the corresponding components in FIG. 1B.

Transmitting unit 31 (51) Receiving unit 33 (53>Synthesizer 35-1 (55-1 to 55-n)>Synthesizer 36-1 (56-1 to 56-n>Communication quality monitoring unit 37 (57) Control unit 38 ( 58> Reference crystal oscillator 40 (71) Transmission mixer 41 (61) Interference detector 42 (62) Reception mixer 43 (63) Radio transmission circuit 46 (66) Radio reception circuit 48 (68) However, control unit 38 The signal line from the power supply sensor SE and the signal line to the switch SW for switching the 2-way power supply are not provided because they are unnecessary.

FIG. 1D shows a wide area radio base station, for example 17-1, which transmits and receives control signals and communication signals to and from the mobile radio device 50.
An example of this is shown. Here, the control signal interface 152 interfaces the control signal from the barrier exchange 20 and applies the control signal to the angle modulator 154i,
The angle-modulated control signal is applied to the transmitter Miku+J156-1, mixed with the local oscillation signal from the local oscillator 155-1, and amplified by the transmitter power amplifier 158-1.
A control signal is sent from the antenna to the mobile radio device 50 via an isolator (not shown).

The uplink control signal from the mobile radio device 50 is received from the antenna via an isolator (not shown) to the reception mixer 161-1, where it is mixed with a local oscillation signal from the local oscillator 155-1 and sent to the demodulator 162-1. It is demodulated with 1,
is added to the control signal interface 152, and the barrier exchange [
20.

The communication signal interface 153 interfaces communication (talk) signals from the barrier exchange 20 to the angle modulator 15.
A communication (speech) signal is applied to 4-2, 154-3, and the angle-modulated communication (speech) signal is sent to transmission mixer 156-2, 156-2, 154-3.
56-3, local oscillators 155-2, 155
-3 and is mixed with the local oscillator signal from transmitter power amplifier 1.
58-2 and 158-3, and are sent from the antenna to the mobile radio device 50, which is moving at high speed, via an isolator (not shown).

Upstream communication (speech) signals from the mobile radio device 50 are received from the antenna via isolators (not shown) to reception mixers 161-2, 161-3, and then sent from local oscillators 155-2, 155-3. It is mixed with the local oscillation signal of , demodulated by the demodulators 162-2 and 162-3, applied to the communication signal interface 153, and sent to the barrier exchange 6!20.

The control unit 151 receives instructions from the barrier exchange 20 and instructs the local oscillators 155-1 to 155-3 to specify oscillation frequencies.

FIG. 1E shows another embodiment 30B of the radio base station 30 (for example, 3O-1) that communicates with the mobile radio device 50, which has a configuration different from that of the mobile radio device 50 shown in FIG. 1B. They are almost the same, but the difference is that they do not have an ID/roam/area information collation storage unit 54 (FIG. 1B), but instead have an ID identification storage unit 34 for identifying and storing the ID numbers of the user and the called party. , there is no telephone section 59 (FIG. 1B), and an interface 39 to the barrier exchange va20, which takes the place of the telephone section 59, is provided.

Each component corresponding to FIG. 1E and FIG. 1B will be listed below, and explanation of each function will be omitted. Here, the numbers in parentheses are
1B is the number of each corresponding component in FIG. 1B.

Transmitting section 31 (51) Receiving section 33 (53) Synthesizers 35-1 to 35-n (55-1 to 55-n) Synthesizers 36-1 to 36-n (56-1 to 56-n> Communication quality monitoring section 37 (57> Control unit 38B (5B> Reference crystal oscillator 40 (71) Transmission mixer 41 (61) Interference disturbance detector 42 (62) Reception mixer 43 (63) Radio transmission circuit 46 (66) Radio reception circuit 48 (68 ) However, the control unit 38B does not include a signal line from the power sensor SE and a signal line to the switch SW for switching the 2-way power source because it is unnecessary.

FIG. 1F shows another embodiment of the wireless base station 30, the connection relationship between the barrier switch 20 and the wide area wireless bases #17-1 to 171. Here, the wireless base station 30 including a plurality of transceivers
C shares the antenna sharing device 96 and the wireless base station control device 32, and transmits/receives many telephone calls (transmissions) 1N90-1 to 90-9.
0-m, rn communication quality monitoring receivers 93-1 to 93-rn having both the functions of the radio receiving circuit 48 and the communication quality monitoring unit 37 shown in FIG. 1E, and a control channel for control signals. A dedicated control transceiver 94 is shown and is connected to the telephone network 10 via the barrier switch 20.

11th: Transmission and reception Vs used in the figure 90-1 to 90-m
The configuration of one of the transceivers 90 is shown in FIG. 1G, which includes an ID identification storage section 34C2 a control section 38C1 included in the radio base station control device 32, an interface 39C with the barrier switch 20, and a reference crystal oscillator. The connection relationship with 40C is shown.

The transmitter/receiver 90 shown in FIG. 1C has almost the same configuration as the wireless base station 30B shown in FIG. 39C and a reference crystal oscillator 40C.

Since the transmitter/receivers 90-1 to 90-rrN in FIG. 1F are used, the changeover switch 44-
1.44-2, synthesizers 35-1 to 35-n
and each specific one of 36-1 to 36-n.
If one synthesizer is selected, the radio base station 30C shown in FIG. 1F can simultaneously transmit and receive m channels.

In addition, a changeover switch 44-1゜44- for transmitting and receiving 190
If the synthesizers 35-1 to 35-n and 36-1 to 36-n are operated at high speed and repeatedly switched, one transceiver 90 can simultaneously transmit and receive n channels. Is possible. Therefore, the wireless base station 30C in FIG. 1F can simultaneously transmit and receive up to mxn channels.

Another embodiment of the mobile radio 50 is shown in FIG. 1F-1.

The difference between the mobile radio 11150B in FIG. 1H and the mobile radio 50 shown in FIG.
and a C/N measurement receiving section 52 are installed, and a reception switching controller 65C is installed in both reception mixers 63 and 73, respectively.
and a changeover switch 64-1 controlled by the control unit 58B.
5 and 64-3 to synthesizers 55-1 to 55-.
The output of n is applied to the transmission mixer 61 via a changeover switch 64-2 controlled by a transmission switching controller 67C.
The point is that the outputs of the synthesizers 56-1 to 56-n are applied.

The mobile radio 11150B shown in FIG. 1H is equipped with a sensitivity having a particularly remarkable reception diversity effect. A part of the received signal received by the antenna section of the mobile radio 150B is added to the reception mixer 73. Selector switch 64- as local oscillation frequency to receiving Miku+J73
Outputs from synthesizers 55-1 to 55-n are applied via 3.

This changeover switch 64-3 is different from other changeover switches 64-
It is not necessary to switch at a high speed like 1 or 64-2, and a low switching speed of, for example, about 10 Hz is sufficient. When the selector switch 64-3 is in the position to obtain the output of the synchronized noise generator 55-1, the C/N value (carrier-to-noise ratio value) of the channel CHI measured by the C/N measurement receiving section 52
is transmitted to the control unit 58B. Then, selector switch 64
-3 is in a position to obtain the output of synthesizer 55-2, the C/N value of channel CH2 is measured. When the output of the synthesizer 55-n is turned on, the C/N value of CHn is measured and the control unit 58
Communicate to B. The control unit 58B uses these values to control the reception switching controller 65C and the transmission switching controller 67C.
For example, the switching frequency of each of the circuits is controlled to operate at a speed inversely proportional to the C/N value.

It is clear that the mobile radio device 50B can also be used by being attached to an automobile, as shown in FIGS. 8A, 8B, and 8C.

Next, a system for increasing the reception diversity effect will be briefly described. FIG. 1I shows an example of the configuration of the mobile radio device 50C in this case.

In FIG. 11, the input radio waves (input signals) to the mobile radio device 50C are divided into equal parts by the antenna input section, and each of them arrives at the radio receiving circuit 68=1.68-2...68-n. Each of the radio receiving circuits 68-1 to 6B-n is provided with a receiving mixer 63-1.632, . . . , 63-n and a receiving section 53-1.53-2° . In addition, the reception mixers 63-1 to 63-n have synthesizers 55-1, 55-2, . . . , 55-n, respectively.
The local oscillation frequency from is input. Therefore, in the configuration shown in FIG. 1B, the reception selector switch 64 shown in FIG.
-1, and it is possible to always receive and demodulate the signals of each radio channel CHI, C) -12°, . . . , C1-In. Also, a part of the output signals of these receiving units 53-1 to 53-n is sent to the control unit 58C, and roughly the other part is sent to the control unit 58C.
Added to the mixing circuit 69 is a normal diapersity receiver (
In this case, the signal is subjected to the same processing as in the case of "post-detection and synthesis" and is sent to the telephone section 59. In addition, each receiving section 53-1 to 53-n
A part of the output is sent to communication quality monitoring units 57-1 to 57-5, respectively.
7n, and their outputs are applied to the control section 58C.

FIG. 1J shows a mobile radio device 50D that is different from the mobile radio device 50C shown in FIG.
Wireless transmission circuits 66-1 to 66-n including -1 to 51-n
Synthesizers 56-1 to 56 which are commonly connected and applied to the signals to be transmitted to each of the transmitting units 511 to 51-n, and each of which generates a designated frequency under control by a control unit 58D. -n is applied to each transmission mixer 61-1 to 61-n. This mobile radio device 50D can continuously transmit a plurality of radio channels without chopping them using the changeover switch 64-2, unlike the mobile radio device 50C (FIG. 11).

By adopting a circuit configuration as shown in FIG. 11 and FIG. 1J, it is possible to obtain a large diversity effect.

FIG. 8A also applies to mobile radio devices 50C and 50D.

It is clear that the device can be used by being attached to an automobile as shown in FIGS. 8B and 8C.

1 and 1L show embodiments of other radio base stations 30D and 30E, and FIGS. 1M and 1N show embodiments of other radio base stations 30D and 30E.
Transmitter/receiver 90-1 to 90-m used in Figure F
Other embodiments of transceivers 90B and 90G are shown.

First, the radio base station 30D and the transceiver 90B shown in FIGS.
Similarly, each independent synthesizer 35-1 to 35
-n, reception mixers 43-1 to 43-n, and reception section 3
Wireless receiving circuits 48-1 to 48- including 3-1 to 33-n
The radio base station 30B shown in FIG.
The configuration is the same as that of the transceiver 90 shown in FIG. 1G. By using the radio base station 300 using the radio base station 30D and the transceiver 90B, it is possible to expect a diversity effect when receiving a high control signal in the high speed movement mode, which will be described later.

The radio base station 3OE and the transmitter/receiver t190c shown in FIG. 1L and FIG. 1N are the mobile radio device 5 shown in FIG. 1J.
Similar to 0D, in addition to the receiving side, the transmitting side also includes independent synthesizers 36-1 to 36- and a transmitting mixer 4.
1-1 to 41-n and radio transmitting circuits 46-1 to 46-n including transmitting units 31-1 to 31-n. The configuration is the same as that of the transmitter/receiver 190B shown in FIGS. 30D and 1M.

By using the radio base station 30C using the radio base station 30E and the transceiver 90C, it is possible to expect a diversity effect when transmitting control signals in the high-speed movement mode, which will be described later.

Mobile radio t150 (B, C, D > mlt! Between base U30 (B, C, D, E) and f36 bar exchange 120 (7) When using a control channel dedicated to control signals for control signals In some cases, signals outside the communication (speech) band are used.

In order to transmit this control signal outside the communication (speech) signal band, specifically, when the control signal is an analog signal, a second
As shown in figure (a), the communication channel ↑I channel band C, 3~
Lower frequencies outside 3.0KI-1z'DO (e.g. about 1
001-1z> or higher frequency 'DI-fD2=1
03""08 (for example 3.8K) - 1z to C, 1K
8 waves up to 4.5KH2 at H2 intervals are used.

When there are many items to be controlled, ie, control data, the number of control frequencies fDo to fD8 may be further increased, or a subcarrier format may be used. At this time, more control data can be transmitted by, for example, applying frequency modulation or amplitude modulation to one or more waves of "DO" f08.

Furthermore, when a digital data signal is used as a control signal, it is also possible to digitally encode the audio signal and time-division multiplex the two to be transmitted.
Shown in Figure (b). FIG. 2(b) shows an example of a case where an audio signal is digitized by a digital encoding circuit 91, and the audio signal is multiplexed with a data signal by a multiplex conversion circuit 92, and then applied to the modulation circuit of the transmitter 31.

Below, the functions of the mobile radios 50 CB, C, D), the radio base stations 30 (B, C, D, E) and the gateway exchange 20 will be explained in sequence.

(A>Mobile radio device 50 (B, C, D) First, among the functions provided by the mobile radio device 50 (B, C, D), the functions of the control unit 58 (B, C, D) will be explained. Control unit 5
8 (B, C, D) has the following basic functions.

i) Commanding the radio transmitting circuit 66 of the own mobile radio device 50 (B, C, D) to emit or stop transmitting radio waves and controlling the transmission power level.

Regarding transmission power control, the transmission power varies greatly depending on whether the wireless base station communicating with the other side is for wide area or not, and the transmission wireless channel, that is, the radio frequency, also differs depending on the system, but in general they are different. Therefore, it is equipped with a function that can deal with it (see Fig. 8C).

ii) Instruct the radio receiving circuit 6B of the own mobile radio device 50 (B, C, D) to receive or stop radio waves.

1ii) Instructing the telephone unit 59 whether or not to send a dial signal and instructing the transmission/reception of voice.

■) Synth) Noiser group 55-1 to 55nJ3 and 56
-1 to 55- Excavation frequency (channel) designation, excavation command and stop command for n.

■) Control commands to the reception a3 and transmission switching controllers 65C and 67C.

vi) Determining whether or not to change one or more channels to be used based on information from the communication quality monitoring unit 57.

vii) Determining whether or not to change the channel to be used based on information from the interference detector 62.

viii) ID/Roam area information verification storage unit 54
Confirmation of the ID of the other party to communicate with (43) and determination of channel to be used based on the information from.

ix) Transfer of communication channels to mobile radios of higher rank of +J-bis type.

X) Determination of on/off duty conditions for the reception (transmission) switching controllers 65C and 67C.

xi) Regarding control decisions, radio base station 30 (B.

C, D, E). When this differs from the radio base station 30 (B, C, D, E) regarding control decisions, the radio base station 30 (B, C, D).

E) to be able to exercise initiative over

xii) Estimating the moving direction and moving speed of the mobile radio device 50 (B, C, D) based on information from the communication volume 'M monitoring section 57.

xiii) Based on the report from each radio base station 30 (B, C, D, E) that received the calling signal (using control channel) from the mobile radio t150 (B, C, D), the received signal Wireless base station 30 with the best quality (B.

C, D, E) and the next best wireless base station 30 (B, C.

D, E) or the mobile radio device 50 (B, C, D) by detecting the moving direction, speed, etc. of the new zone radio base station 30 (B, C) in anticipation of the destination zone.

D, , E). For this purpose, select the radio channel that should be used for communication with the mobile radio 50 (B, C, D) from among the radio channels assigned to the radio base station at that time. Specify an unused call channel number. For wireless base stations with degraded communication quality, the mobile wireless device 50
Sends a command signal to stop communication with (B, C, D).

Next, by using the functions 1) to xi i i) in combination, the following applied functions can be provided.

1) The ID/roam area information collation storage unit 5 checks the radio channels used by other mobile radios or other radio base stations operating in the vicinity of the own mobile radio 50 (B, C, D).
4, and use it when making a call or switching communication channels.

2) As one application of the functions of x) and xi), when call traffic is congested, the number of channels simultaneously used for communication is eliminated, calls are suppressed, and channels in use are disconnected or recommended for early termination.

3) Using the functions i), vi), and vii),
Setting the optimum transmission level for own mobile radio 150 (B, C, D).

4) One application of the function in 3) is to determine the optimal signal speed for digital signal transmission.

5) Determine the optimal channel to use depending on the type of communication (N talk, FAX data, etc.). In addition, the control 611 functions associated with transition to another zone include 6) selection of fr radio base station 30 after switching the channel during communication; At this time, taking into consideration the moving direction of the mobile radio device 50 (B, C, D), the new radio base station 30 (B) is selected.

Select C, D, E). In order to prevent signal collision, each radio base station 30 (B, C, D, E) is instructed on the timing of response signals.

7) For the gateway switch 20, the wireless base station 30 (
Opening/closing the switch group 23 of the communication path and requesting parallel use of the communication path via (B, C, D, E).

8) After the mobile wireless device 50 ([3, C, D) starts talking, if the communication traffic situation within the system allows it, determines whether to implement transmitting/receiving dynamism and instructs to perform the operation.

9) Mobile radio device 50 performing transmitting/receiving diversity
Regarding (B, C, and D), if there is traffic congestion, or if an important subscriber makes a call or a person requesting broadband signal service appears at that time, the multiplicity of transmitting and receiving diversity (number of channels used) will decrease or , Determining and executing diaperity stopping.

10) According to items 1) to 7), the mobile radio during communication
50 (Even if B, C, and Di move within the same zone or change zones and the communication quality with the wireless base station 30 (B, C, D, E) deteriorates, Judgment on whether to perform the operation of switching the channel during communication (busy).In order to perform this operation, it is necessary to send a control signal to the opposing radio base station 30 (B, C, D, E). However, this instruction (control signal) is given using a communication channel using a frequency band above or below the frequency band of the communication signal, as shown in FIG. 2(a).

11) By moving, the mobile radio equipment 50 (B, C, D) faces each radio base station 30 (B,
, C, D, E), the moving direction and moving speed of the mobile radio device 50 (B, C, D) can be determined by having the mobile radio device 50 (B, C, D) report the measurement result of the change in reception quality of the mobile radio device 50 (B, C, D). On the other hand, we comprehensively judge the traffic status (the usage status of the communication channel) at the wireless base station 30 (B, C, D, E) in the moving direction of the mobile radio device (B, C, D), which was estimated and separately investigated. , if necessary, these wireless base stations 30 (B
.

Mobile radio device 50 (B, C) communicating with C, D, E).

D) Determine whether to gradually decrease or increase the multiplicity of transmitting/receiving diversity.

Furthermore, if the control unit 58 recognizes that the moving speed of the mobile radio 50 exceeds a certain value, or the gateway switch 20
or wireless base station 30 (B, C.

12) When the pre-move II device 50 (B, C, D) is in the standby state, the control function when it is recognized by communication from the wireless base station 30 (B, C, D, Stop transmitting the location registration signal every time the zone [E> is exceeded.

13) In the state of 12>, the mobile radio device 50
The standby channel of the radio receiving circuit 68 (B, C, D) should be set to the paging channel transmitted from the wide area radio base station 17.

14) In the state of 12), the mobile radio 50
The location registration signals from (B, C, D) are transmitted to the wide area wireless base station 17 using an uplink control channel corresponding to the downlink control channel transmitted from the wide area wireless base station 17.

Here, in order to recognize the moving speed of the mobile radio device 50, there is a method in which the communication quality monitoring unit 57 measures the period of instantaneous electric field fluctuation due to fading, or a method in which the temporal change in the average received electric field value is measured. .

The former utilizes the fact that there is a proportional relationship between the moving speed and the cycle of electric field fluctuations, and the latter utilizes the fact that the average received electric field value changes with changes in the distance from the transmitting point to the receiving point.

However, mobile radio I! 150 (B, C, D), the mobile radio 1150 (B.

C, D) Not only itself, but also multiple nearby wireless base stations 30 (B, C, D, E) or wide area wireless base station 1
7 also performs the same measurements as above, and calculates by totaling these at the barrier exchange 20 and the mobile non-$I machine 50 (B, C, D).

To express the above control function in one word, some of the functions of the radio network control station 12 in FIG.

D). This becomes possible only by using VLSI technology, which has recently made remarkable progress, and can be described as making mobile radio equipment intelligent. However, even if mobile radios are made intelligent using conventional technology, their effectiveness is limited, especially in terms of improving radio line control capabilities and eliminating instantaneous interruptions when switching channels during calls. Therefore, it is only by using the method according to the present invention that it becomes intelligent in both name and reality.

(B) Wireless base station 30 (B, C, D, E) A device having the following functions is installed in each of the wireless base stations 30 (B, C, D, E).

a) Each wireless base station has a wireless transceiver for w for transmitting and receiving a small number (usually one) of control channels, and a dedicated communication channel corresponding to the number of communication channels assigned to that wireless base station. The number of radio transceivers has been installed. For example, assume the wireless base station 30C in Figure 1F. The number of communication channels to be allocated to one wireless base station 30C is determined by the number of mobile wireless devices 5 existing in the small zone that it is in charge of.
0 (B.

The optimum value is given by the call traffic in C).

If the area of the zone is large and there are many mobile radios in that area, the call traffic will inevitably increase, so at least one control channel and multiple call channels are required, and the transmission/reception l1M90 ( 1st G
Naturally, a plurality of the numbers shown in Fig.) are required. In the NT's car telephone system, there is an actual example in which two control channels and a maximum of about 60 communication channels are allocated in the case of a large group.

However, the size of the zone gradually became smaller, and finally it ended up in the above-mentioned document, "Proposal of Ito-Pacific Mobile Telephone System," Communications Society of Japan, Communication System Study Group Materials O3-86-8B, 1986, 1.
As shown in January, when it comes to very small zones called microcells with a radius of about 25 meters, the wireless base stations that handle this area as a service area are installed there due to call traffic, method, and cost. As the wireless channel, control and call are each set to 1,
The function of the wireless device that covers this may be 1 transmission/reception. In other words, 51 transceivers are used for both control and communication (see Figure 1E). What's more, this dual-purpose system is different from the conventional system in that when a call is made from a mobile radio, it is initially handled using the control channel, and after specifying an available call channel, it can also change to the call channel itself and use the same call channel. Rather than using a simple method of communicating with a mobile radio, as will be explained later, we use a single mobile radio and a communication channel to quickly transmit and receive radio frequency signals that interfere with the signal even during communication. By repeatedly switching between the communication channel and the control channel at a switching speed that does not affect the mobile radio device 50 (B
A feature of the present invention is that it has an excellent function of accepting calls to and from telephones , C, and D) as well as making it possible to make telephone calls.

As explained above, the wireless base stations 30 (B, C, .

Various cases can be considered for the configurations D and E), and the present invention can be applied to all of them.

However, in the radio base station 30 of FIG. 1A, only one set of transmitter/receiver is shown, and the rest are omitted.

b) The transmitter/receiver dedicated to communication channels installed in each radio base station 30 (B, C, D, E) is configured to transmit one channel out of a plurality of radio channels among the radio channels assigned to that radio base station. Of course, it is possible to receive
It is assumed that one transceiver 90 installed in the radio base station 30G (FIG. 1F) has a configuration as shown in FIG. 1G, for example.

That is, the configuration of the portion that transmits and receives radio signals is substantially the same as that of the mobile radio device 50 shown in FIG. 1B. As a result, call traffic in this zone increases and is typically
Even in the wireless base station 30C where the number of transmitters/receivers 190 is installed to provide ml communication channels, if communication of m channels or more becomes necessary due to an increase in call traffic, the wireless base station 30C is configured. The synthesizer 35-1.3 currently in operation is controlled by a control signal sent from the control unit 38C in the same base station to one transceiver 90.
35-2.35-3°..., 35-n and 36-2.36-3. ..., 36-r) and the selector switches 44-1 and 44-2. As a result, the conventional m-channel transmission and reception is now possible up to
Transmission and reception of n channels becomes possible. The number of channels that can be used simultaneously increases dramatically.

However, the transmission power of each channel will decrease depending on the number of switches unless a power amplifier is installed at the output of the transmission mixer 61, so it is necessary to pay attention to this point, and the total number of channels given to the system will decrease. It becomes the upper limit. Alternatively, if interference is to be caused to a channel that is communicating in another zone, the number of channels less than that is the limit.

The radio base station 30B in FIG.
0 (B, C, D) during communication using the communication channel, repeat the switching between the communication channel and the control channel at a switching speed that does not interfere with the transmitting/receiving radio frequency signal in the same way as described above. By doing so, it is possible to accept the call operation and make it possible to make and receive a call even for the mobile radio device 50 (B, C, D) that newly desires to make and receive a call.

Hereinafter, it will be further explained using Fig. 1G, but Fig. 1C,
Radio base stations 30, 30 in FIG. 1E, FIG. 1, and FIG. 1L.
The functions of the radio base station 30C equipped with the transceivers 90B, 30D, 30E and the transceivers 90B, 900 of FIGS. 1M and 1N are also substantially the same.

The control unit 38C has the following basic functions.

) Commanding the transmitter 31 of the transmitter/receiver 90 included in the own radio base station 30C to emit or stop transmitting radio waves, and controlling the transmission power level.

ii) Instructing the receiving unit 33 of its own wireless base station 30C to receive or stop radio waves.

1ii) Notify the gateway exchange 20 whether dial signals can be sent or not, and whether voice transmission and reception can be done or not.

iv) Synthesizer groups 35-1 to 35-n and 3
Oscillation frequency (channel) designation, oscillation command and stop command for 6-1 to 36-n.

■) For reception and transmission switching controller 45.47,
Control command.

vi) Communication quality monitoring receivers 93-1 to 93-rn
The mobile radio device 50 (B.

Judgment as to whether or not it can be communicated to C and D).

vii) Determining whether or not to change the channel to be used based on information from the interference detector 42.

viii) Confirmation of the other party TD with which to communicate and determination of the channel to be used based on the information from the ID identification storage unit 34C.

ix) Based on a request from a mobile radio with a higher service type, the mobile radio 50 (B.

Aim to complete mid-term communication with C and D). Or terminate immediately.

X) For reception and transmission switching controller 45.47,
Determination of on/off duty conditions.

xi) Regarding control decisions, mobile radio 50 (B.

C, be lower than D). This is to transfer the initiative to the mobile radio equipment 50 (B, C, D) when the mobile radio equipment 50 (B, C, D) disagrees with the control decision. However, regarding xi), it has been determined for convenience of explanation, and in an actual system, the wireless base 8
There is no problem even if 30 people take the initiative (it is possible to implement it).

xii) As already explained in a) and b), in the case of a radio that serves both a communication channel and a control channel, (A
) The mobile radio device 50 (B, C.

D) Similarly, as shown in FIG.
Equipped with noisers 35-1 to 35-n and 36-1 to 36-b, new calls can be made and received by repeatedly switching between communication channels and control channels at a switching speed that does not interfere with the radio frequency signals being transmitted and received. Mobile radio device 50 that wishes to
(B, C, D) must also have the function of accepting call operations and making calls possible.

xiii) The random number generated by the built-in random number generator in the ID identification storage unit 34 (34C) is compared with the response timing command signal instructed from the mobile radio 150 (B, C, D), and if it matches the instruction. It must have the function to send a response signal at the specified timing.

xiv) Able to communicate with wide area wireless base station 17.

xv) Call channel numbers used to communicate with mobile radio equipment 50 (B, C, D) and mobile radio equipment 50
It has a function of transmitting unique information such as the service class (B, C, D), and dynamic information such as movement direction to the IO identification storage unit 24 of the barrier exchange 20.

Next, by using the functions i) to XV) in combination, the following applied functions are provided.

1) Store in the ID identification storage unit 34C the radio channels used by other mobile radio base stations and other mobile radios in the vicinity of the own radio base station 30 (B, C, D, E). Use this when making a call or switching channels during communication.

2) As an application of the functions vi), vii), and ix), when call traffic is congested, suppressing calls, cutting channels in use, or issuing early termination recommendations.

3) Using the functions i), vi), and vii),
Setting of the optimum transmission level in own radio base station 30 (B, C, D, E).

4) As one application of the function in 3>, determining the optimal signal speed for digital signal transmission.

5) Determine the optimal channel to use depending on the type of communication (telephone, fax data, etc.).

In addition, the control I function associated with transition to another zone is as follows: 6) Mobile radio device 5° (B,
Based on the signals from C, D), communication of reception quality data and new wireless base station 30 (B, C).

If selected as D or E), start communication.

7) For the barrier switch 20, the mobile radio 50 (
Based on requests from B, C, and D), opening/closing the switch group 23 of the communication path and requesting parallel use of the communication path.

8) After changing the channel during a call, it will remain that way for a certain period of time.
HMm50 ([3,C,D
) ID and call channel number.

9) Utilizing the function of
(B, C, D, E) responds according to the response timing instruction included in the calling signal of the mobile radio 50 (B, C, D), and To be determined by numbers.

10) Using the function of xiv), the wireless base station 30 (
The mobile radio equipment 50 (B, C, D) that is moving at high speed in the vicinity of the mobile radio equipment 50 (B, C, D, E) is placed on standby on the communication channel specified by the information from the wide area radio base station 17.

To express the above control function in one word, a part of the function of the radio network control station 12 in FIG.

D, E), wide area wireless base station 17 and mobile wireless device 50
(B, C, D), it became possible to accommodate all the functions of the radio network control station 12, and it became possible to abolish the radio network control station 12.

However, using the conventional technology, the radio base station 30 (
Even if B, C, D, E) and wide-area wireless base stations 17 are made intelligent, there is a limit to their effectiveness, especially in terms of improving the radio line control ability and eliminating instantaneous interruptions when switching between telechannels during a call. is completely ineffective, and it is only by using the method of the present invention that it becomes intelligent in both name and reality.

(C) Wide area wireless base station 17
If the moving speed within the service area (B, C, D) exceeds the value specified in the system design, the traffic requesting location registration (change) will increase, causing traffic congestion. The mobile radio 50 (B,
A control signal for stopping transmission of the position σ green signal is sent to C and D), and the position is then registered with the wide area wireless base station 17 until the moving speed becomes equal to or less than the value determined in the system design. It is configured. In addition, the mobile radio device 50 (
B.C.

When D) shifts to a high-speed moving state during a call, channel switching is performed to the wide area wireless base station 17 during the call.

Wide area wireless base station 17 (
17-1 to 17-i> are the mobile radios 150 (B.

C) is used to communicate with the mobile radio 50 when there is an incoming call while moving at high speed while on standby as shown above. Mobile radio device 50 in the above state (B
, C, and D) are in a state of receiving the control channel sent from the wide area wireless base station 17, and the wide area wireless base station 17 receives the barrier exchange I! via the control signal interface 152. ! 20, and sends the control signal through the downlink control channel, and communicates (talks) from barrier exchange 1!20 via the communication signal interface 153.
Upon receiving the signal, it sends out a communication (speech) signal through a wireless communication channel.

The wide area wireless base station 17 also has mobile wireless devices 50 (B, C,
It is also used when D) makes a call while moving at high speed. This is as if the mobile radio device 50 (B, C, D) were connected to the radio base station 30 (B, C, D).

The call can be established by performing the same operation as for calling E). However, mobile radio equipment 50
The transmission power from (B, C, D) is the wireless base station 30 (
Compared to cases B, C, D, and E), the power range has been increased to the required level.

Even if Zaraani mobile radio 5.0 (B, C, D") is in standby mode, if the location cannot be registered for some reason, it will send a call or call signal in the same way as above. used for.

That is, the mobile radio device 50 (
B, C, D), the barrier switch 20 searches the ID identification storage section 24, and if it is confirmed that the above state is met, the call path control section 21 calls the wide area wireless base station 17. The mobile radio 50 (B, C,
D) Send to.

After receiving the above-mentioned incoming call signal, the mobile radio device 50 (B, C
, D) can receive a call by performing almost the same operation as the calling operation described later.

In addition, by including necessary information regarding the start of a call, such as surrounding communication traffic conditions and the number of usable call channels, in the control signal sent from the wide area radio base station 17 to the mobile radio device 50, the system as a whole can be improved. operations will be smoother.

The configuration of the wide area wireless base station 17 is similar to that of the wireless base station 30 of the present invention.
The configurations are the same as those in (B, C, D, E), but the only difference is the size of the transmission power and the given channel (frequency band, etc.). Several to 1010 sets of call transmitters are required depending on the call traffic, and two sets are shown in FIG. 1D. The transmission output is for each wireless base station 30.
(B, C.

In extremely small cases (called microcells), such as within a circle with a radius of 25m in the service zone shown in D and E), there are usually 100 to 10,000 microcells (with a radius of 250m to 2 .5Km> is defined as the value that covers the included service area.

FIG. 9 shows the wide area wireless base station 17 and the wireless base station 830 (B, C).
, D, and E) and is a layout diagram for schematically explaining the relationship between one novice area and In the figure, a small regular hexagon represents one wireless base station 30 (B, C, D, E)-'J
A wide area wireless base 817 is also installed in the regular hexagon surrounded by a thick black line at the center of the service zone, and all service zones (37
(includes 1 regular hexagons) indicates the service zone of the wide area wireless base station 17.

The wide-area radio base station 17 receives incoming calls to the mobile radios 50 (B, C, D) that reach within these areas (from the wide-area radio base 817 to the mobile radios 50) and sends communication signals or 150 (B.

C and D), the number of pre-movement fIJ machines provided by the wide area radio base station 17 is the same as the number of pre-move fIJ machines provided by the wide area radio base station 17 to the radio base station 30 whose service area is the micro cell. In comparison, it is 100 to 100 times more. However, since the frequency with which the mobile radio device 50 moves at high speed is not so high, FIGS.
The output of the transmitter of the wireless base stations 30 (B, C, D, E) in the figure should be increased by 100 to i ooo times, and the frequency used should be changed so that the wireless channel given for wide area can transmit and receive. It only takes 1 minute, and it only takes a few minutes or at most 10 or so radio base station transceivers.

When the service area of the system is wide and the number of wireless base stations 30 exceeds 10,000, wide area wireless base station 1
7 is also installed not only in one place but in multiple places. In this case, which wide area wireless base station] 7 is to be used is determined using information in the ID identification storage section 24 of the barrier switch 20.

Moreover, the mobile radio devices 50 (B, C, D) are moving to the Sarzos area of another wide area wireless base station 17 adjacent to the service area of one wide area non-TFA base station 17,
If a call is in progress, channel switching during the call is performed in the same manner as that performed between sub-zones.

In this case, the gateway switch 20 is in charge of sending out the same call signal from the multiple wide area wireless base stations 17 in line control, and also controls the repetitive switching and reception of the two transmitted waves transmitted in this way. The mobile radio device 50 itself shown in FIG. 1B is responsible for this.

(D) Gateway Switch 20 The barrier switch 20 having the configuration shown in FIG. 1A is a mobile radio device 50 in the mobile communication system according to the present invention.
ID identification storage unit 2 to store location information of (B, C)
function 4), establishes a communication path between the mobile radios 50 (B, C, D), opens and closes the switch group 23 under control of the communication path control unit 21, and connects the mobile radio 4150 in the mobile communication system. (B, C, D) and the telephone network 10 outside the system, and is in charge of opening and closing the switch group 23 under the control of the communication path control section 21.

In addition, because the mobile radio device 50 is moving at high speed, it may not be able to satisfactorily register its location with the radio base station 30 (B, C, D, E) or send a signal to the barrier indicating that the registration function is being stopped. For an incoming call to the mobile radio 50 that is being received by the exchange 20, the call is established via the wide area radio base station 17. Alternatively, the mobile radio 50 (B) is in a state of high speed movement.

For calls from C and D), the wide area wireless base station 17 directly communicates with the wide area wireless base station 17 and the barrier switch 20.
The information necessary for making a call is exchanged with the other party, and the call is established.

Furthermore, a mobile radio device 50 (B.

Depending on the transfer speed of C and D), the mobile radio 5
0 (B, C, D), and in that case, the mobile line R50 (B
. In this case, the exchange 20 connects the telephone network 10 and the wireless base stations 30 (B, C.

D, E) and the wide area wireless base station 17.

The functions of the barrier exchange 120 will be explained in detail below.

a) Mobile radio! 150 (B, C, D) from each radio base station 3 that received the Reno location registration signal (control channel used)
Based on the report from 0 (B, C, D, E), the ID (self-identification information) of the mobile radio 50 (B, C, D)
is stored in the ID identification storage unit 24 via the communication path control unit 21 included in the barrier switch 20. In this case, in the present invention, since a location registration request is made from a plurality of radio base stations 30 (B, C, D, E), the mobile radio device 50 <B, C, D)
The quality of the signal received (decibel values such as S/N and C/N) is also stored.

b) Execution of the operation of the switch group 23 to be opened and closed in connection with a call originating from the mobile radio 50 (B, C, D) and, if the called party is included in the telephone network 10, the barrier Transmission of information necessary for setting up a call with the called party addressed to the exchange 20.

C) An incoming call signal to a mobile radio 50 (B, C, D) is transmitted from a caller included in the telephone network 10 to the own barrier switch 20.
When the communication is transmitted via the communication path control section 21, the switch group 23 to be opened and closed is operated, and the I/O
The called mobile radio 150 (
Confirm the current location of B, C, D).

d) In connection with an incoming call to the mobile radio 50 (B, C, D), the radio base station 30 (B ,
Instructions to send a call signal to C, D, E). First, this calling signal is transferred to the r#J radio 50 (B).

The current location of C, D) is sent to all the radio base stations 30 (B, C, D, E) where the current location is registered, and each radio base station 30 (B, C, D, E) that receives the , and send out incoming call signals addressed to mobile radio devices 50 (B, C, D) at the same time using the downlink control channel.

However, this transmission time does not necessarily have to be the same time, and may be transmitted sequentially in chronological order for each radio base station 30 (B, C, D, E). In other words, it is only necessary to take measures to avoid interference caused by signal time differences.

e) Mobile radio equipment 50 (B
, C, D) and the moving direction of the mobile radio 50 (B, C, D,) are stored in the ID identification storage unit 24, and are function to transmit this information to the wide area transmission base station 17.

f) Uplink from mobile radio 150 (B, C, D) to radio base station 30 (
Among the signals (B, C, D, E), the call signal is transmitted to a plurality of wireless base stations 30 (B, C, D).

Since the same call signals are transmitted from E) to the barrier switch 20, they are mixed by the call path switch group 23 and sent to the general telephone network 10.

q) Because the mobile radios 1150 (B, C, D) are moving at high speed, etc., the location registration with the radio base station 30 (B, C, D, E) cannot be performed satisfactorily, and the location registration is performed with the wide area radio base station 17. If the mobile radio device 50 (
When there is an incoming call to B, C, or D), an incoming call signal is transmitted via the wide area wireless base station 17. Mobile radio device 50 (
B, C, and D), the wireless base station 30
(B, C.

D and E) are executed by replacing the wide area wireless base station 17.

h) Switching the channel during a call from one wide area wireless base station 17 to another wide area wireless base station 17.

Next, the operation of the entire system will be explained in terms of the following items.

(1) Location registration (2) Call origination operation (3) Call reception operation (4) Application of diversity during times of low traffic (5) Explanation and theoretical basis of chitnel switching during a call and the diversity effect.

(6) Estimation of moving direction and speed of mobile radio equipment and communication channel allocation method for traffic congestion countermeasures.

(1) In the Baume area, which is the permanent location of the location-registering mobile radio 50 (B, C, D), or in the Roam area, which is an area within the service other than the home area, the barrier exchange vs. 20 and surrounding wireless Base E30-1~3O-r
When mobile radio 50 (B, C,
When the power switch of D) is turned on and starts operation,
The first thing that is performed is a location registration operation. The flow of this location registration operation is shown and explained in FIGS. 4A and 4B.

When the power switch of the mobile radio 150 (B, C, D) is turned on, a signal to start an operation for registering the current position is sent to the nearby radio base station, for example 30, using an uplink control channel (CH). -1 to 3Q-n (S201, Fig. 4A) mobile radio device 50 (B, C, D
) includes its own ID as well as a signal for determining the transmission timing of the response signal returned from the surrounding wireless bases [30 (B, C, D, E). The radio base station 30 (B
, C, D, E), the existence of not just one but a plurality of them occurs quite frequently in a small zone system using microcells. Then, these multiple wireless base stations 30
(B, C, D, E), the mobile radio device 50 (B,
For C and D), response signals will be sent at the same time unless special measures are taken.

Response signals from these plurality of radio base stations 30 (B, C, D, E) are sent to the mobile radio tff 150 (B, C.

Since the signals are received at the same time in D), interference occurs and accurate signal reproduction becomes impossible, making location registration impossible. In order to prevent this, a signal that determines the transmission timing as described above is inserted into the control signal sent from the mobile radio device 50 (B, C, D).

Specifically, for example, there are the following signals.

) From the mobile radio tiA50 (B, C, D) (
7) The higher the received electric field level of the signal, the faster the response signal is sent out. For example, if S/N=50dB or more,
Hereinafter, when S/N=45, 40, 35, 30d [3 or more, 1, 2, 3, and 4 seconds later are determined, respectively.

) The lowest last digit (in decimal system) of the ID (self-identification number @) given to each radio base station 30 (B, C, D, E) is transmitted early. For example, the last digit is C, 1.
2, 3, 4. ..., 9, the transmission timings are C, C, 5. ... 4. C. Transmit at 4 or 5 seconds.

iii) Give priority to the radio base stations 30 (B, C, D, E) located in the movement direction of the mobile radio device 50 (B, C, D), and if there may be a plurality of these, The above i) and ii) are incorporated.

iv) A so-called repeating zone number used in the small zone system is given to each radio base station 30 (B, C, D, E), and ii) above is applied to this. Note that the number of repeated zones indicates the degree of frequency reuse used in the system. For example, 7 means that the entire service area (plane) is covered by one wireless base station 30 (B, C, etc.).

D, E) When divided into serviceable zones (hexagonal), if there are 7 different frequency sets (7 channels), service can be provided in the entire area of a plane of any size. means. In addition to 7, the number of repetition zones N is 3.4, 9, 12, 16, 19, 21, 25, etc.
... etc. are often used.

■) Regarding ii) above, each wireless base 030 (B.

C, D, E), each wireless base station 30
When a random number generator is prepared at (B, C, D, E) and a location registration request signal is received, the wireless base station 30 at this point (
It is also possible to cause the random numbers (B, C, D, E) to respond early in descending order of random numbers.

vi) The wireless base stations 30 (B, C, D, and E) transmit response signals in the order of the number of empty channels stored in the memory. For example, if the number of empty channels is 10 or more, it will respond immediately, if it is 9 to 7, it will respond after 1 second, if it is 6 to 4, it will respond after 2 seconds,
When it is 4 to 2, the response is made to respond after 3 seconds, and when it is 1, it is made to respond after 4 seconds.

vii) As the number of communication channels that can be constantly transmitted by the wireless base station 30 (B, C, D, E), in the case of multiple channels, the timing is similar to the above vi) according to the number of available empty C[-1] and send it.

Even if the above measures are taken, the possibility of signal collision (interference) due to simultaneous transmission still exists, although it is extremely small. Measures to deal with these issues will be explained below.

a) The wireless base station is the mobile wireless device 50 (B, C.

Even though a certain period of time has elapsed since sending a response signal to D), the user does not send a location registration signal to D).
(undetectable), the wireless base station 30 (B, C, D, E) that sent the response signal
0 The same signal is retransmitted at the timing determined by (B, C, D).

b) In a), especially the mobile radio 50 (B.

If the retransmission timing is not determined from C, D), for example, the wireless base station 30 (B, C, D).

E) Resend at a timing determined by yourself using a random number table, etc.

It contains the signals mentioned above.

In accordance with the gist of the location registration described above, the operations from step 3202 onward in FIG. 4A proceed. When surrounding radio base stations, for example 30-1 to 30-n, receive the operation start signal from the mobile radio 50 (B, C, D),
202>, the wireless base station 30 (B, C, D, E) is the mobile wireless device 50 (B.

Confirm the start of operation of C and D) (3203), and if confirmed (S203YES), if the downlink control channel is off, turn it on and use the downlink control channel to permit location registration signal transmission. (5204)
>.

Upon receiving the location registration signal transmission permission (3205), the mobile radio devices 50 (B, C, D) transmit a location registration signal with their own ID (identification iq>) using the uplink control channel ( 3206).Communication using this control channel is possible even in the wireless base station 30B shown in FIG. Even if the network is being used between multiple channels, multiple channels can be chopped at high speed and sent and received at the same time, so they are always secured.

Note that depending on the system, the mobile radio device 50 (B, C,
D) The signal to start the above location registration sent from (S201, Figure 4A) and the surrounding wireless base JN30
It is also possible to simplify the device registration signal transmission permission consisting of (B, C, D, E) 1q and then the location registration signal (S206>) to be transmitted only once by using the same signal.

Upon receiving the location registration signal (S207>, the wireless base station 3
0 (B, C, D, E), the reception quality is inspected and the ID
The ID is stored in the identification storage unit 34 (8208). If the result of inspecting the reception quality is above a certain value (S209
YES (Figure 4B), send the location registration request signal to the gateway switch 2.
Send for 0 (5210>.

Gateway exchange 2 that received this registration request signal (S211)
0, it is registered that the reception quality and position are stored in the plurality of radio base stations 30-1 to 3Q-n (321
2).

When this registration work is completed, a registration completion signal is sent out (5213>.The radio base station 30 (B, C, D, E) that has received this registration completion signal sends a registration completion signal to the mobile radio 50 using the downlink control channel. (B, C.

Transfer to D).

A registration completion signal was received (S215>Mobile radio 1l15
0 (B, C, D) inspects the received content and stores the ID (identification number) of each registered wireless base station 30 (B, C, D, E) in the ID roam area information verification storage unit 54. Store (8216>).

With the above operations, the location registration operation is completed and the device enters a standby state for an incoming call.

Note that, as is clear from the above description, the mobile radio device 50 (B) of the mobile communication system according to the present invention.

Location registration in C and D) differs from conventional systems in that registration is performed at multiple locations (in units of wireless base stations). This represents one feature of the present invention.

Furthermore, when storing location registration information, the radio base stations 30 (B, C, D, E) and the gateway exchange 120 also use location registration signals sent from the mobile radios 50 (B, C, D). Measure the quality of and store the value. Therefore, for example, in the barrier exchange 120, the mobile radio 50
For example, in order to store the location registration signals of (B, C, D), along with the TD of the radio base station 30 (B, C, D, E) that had the highest reception quality, Memorize in order of importance.

Table 1 Tesshugami Seigetsu mobile radio ID Reception quality average date S/N (C/N) hour minute second 50　1987. B.11 13, 24.5B 45 1987. B.11 13, 24.56 35　19B7,B,11 13, 24.56 30　1987. B.11 13, 24.56 25　1987. B.11 13, 24.56 Similarly, each radio base station is also a radio base station 30 (B, C.

It stores not only the information received by stations D and E) but also the information received from surrounding wireless base stations as shown in Table 1. This occurs when a communication channel is set up with the mobile radio 1150 (B, C, D) and the channel is switched during a call as the mobile radio 50 (B, C, D) moves. Not only is this useful information, but the mobile radio 50 (B,
This is because it is necessary to estimate the moving direction, speed, etc. of C and D).

For the same reason as above, mobile radio equipment 50 (B, C,
The ID roam area information collation storage unit 54 in D) also stores the same information as in Table 1.

Next, it is assumed that the mobile radios 50 (B, C, D) move from the zone in which their location has been registered and move to an adjacent zone while they are on standby (not making a call). Recognition of this movement is performed by, for example, the wireless base station 30 (B).

In a system in which control signals are constantly sent from stations C, D, and E), the wireless base station 3 included in the received control signal
0 (B, C, D, E), mobile radio device 50 (
It can be determined by comparing it with the ID stored in B, C, and D).

In a system in which control signals are not always sent from the wireless base stations 30 (B, C, D), the mobile wireless devices 50 (B, C, D) transmit signals from the surrounding wireless base stations 3 at predetermined time intervals.
0 (B, C, D, E) using the uplink control channel, and in response to this request, each radio base 830 (B, C, D.

Wireless base station 30 (B, C) sent from E).

This is possible by comparing the IDs of D and E) with the ID information stored in the mobile radio device 50 (B, C, D).

In any of the above systems, among the ID information of the wireless base stations 30 (B, C, D, E) obtained as a result,
Until then, mobile radio equipment 50 (B, C.

If it is discovered that there is at least one new base station ID information different from the base station ID information stored in step D), the mobile radio 50 (B, C.

D) is determined to have moved to a new zone, and the control unit 58
(B, C) are the ID roam area information verification storage unit 54
Execute update of location registration. That is, the ID information of the mobile radio device 50 (B, C, D) is transmitted to the surrounding radio base station 30 (B, C, D, E) using the uplink control channel.

A plurality of wireless base stations 30 (B
, C, D, E), perform the same procedure as already explained and send the mobile radio 50 (B, C,
D) The location registration signal is sent.

Upon receiving this signal, the gateway exchange 20
The mobile radio 50 (B, C,
As the location registration information in D), the conventional information is replaced with new information. As a result, the mobile radio device 50 (B,
The location registrations in C and D) are updated.

The above update work is performed on the mobile radio device 50 (B, C.

D) is necessary because it is in standby mode, and if you move to a new zone during communication (talking), the new communication channel is assigned to the Fi wireless base station 30 (B, C, D) as described later.
, E) and mobile radio 50 (B.

C and D), the location registration in the gateway exchange 20 is updated at the same time, so no special operation is required.

Note that in a system where the number of radio devices installed in the radio base stations 30 (B, C, D, E) is small and the radio devices for control channels are diverted to communication channels, the radio base stations 30 (B, C, D, E) are other mobile radio devices 50 (B
, C, D), if the conventional technology is used, there is no other radio station on standby, so even if a location registration request is issued from another mobile radio, the call will be considered invalid. It had become.

However, as a configuration of a mobile radio device, for example, a plurality of synthesizers 551 to 55-n, 5 as shown in FIG.
6-1 to 56-n and changeover switches 64-1, 64-2, etc., the transmitting/receiving channel can be repeatedly switched while chopping, even if the mobile radio is already communicating with another mobile radio. , newly arrived mobile heat ray t
It is possible to communicate with a50 (B, C, D) using a control channel. Therefore, it becomes possible to accept location registration.

Additionally, when the mobile radio's moving speed within the service area in standby mode exceeds the value determined by the system design, the traffic requesting location registration (change) increases.
In addition to causing traffic congestion, there is a possibility that accurate transmission of location registration signals may not be performed. A control signal is sent to the aircraft 50 to stop transmitting the location registration signal, and from then on, until the moving speed falls below the value determined by the system design.
It is configured to maintain the state of location registration with the wide area wireless base station 17.

The wireless base station 30 (B.

In C, D, and E), the following signals are sent to the barrier switch 20.

i) ID 11 of the mobile radio device 50 that sent it 1) ID 1ii of the radio base station 30 > Time of reception On the other hand, the gateway exchange 20 that received this signal inspects the content of the signal and stores the above signal in the ID identification storage unit 24. remember.

This memory content is stored in the mobile radio device 50 (B, C.

D,) is in high-speed movement mode and there is an incoming call, it is used to determine which wide area transmission base station 17 should send a paging signal.

When the mobile radio devices 50 (B, C, D) are in high-speed movement mode, the wide area radio base station 17 is used, and the flow of the location registration operation in this case is shown in FIGS. 4C to 41. explain.

In the home area where the mobile radio equipment 50 (B, C, D) is permanently installed, or in the roam area which is an area within the service other than the home area, the gateway switch 20 and the surrounding radio base station 30-1 are already connected. When the power switch of the mobile radio device 50 (B, C, D) is turned on and starts operation while the wide area radio base station 17-1.17-2.17-3 is operating, location registration is performed. An action is taken.

When the power switch of the mobile radio device 50 (B, C, D) is turned on, a signal to start an operation for registering the current location is sent to nearby radio base stations, for example, using an uplink control channel (CH). 30-1 (S401
, Figure 4C).

Upon receiving the operation start signal from the mobile radio device 50 (B, C, D) (3402>, the radio base station 30-1 confirms that the mobile radio device 50 (B, C, D) has started operating.
403>, if confirmed (3403 YES), if the downlink control channel is off, it is turned on and permission to send a location registration signal is sent out using the downlink control channel (S404).

However, since the mobile radio devices 50 (B, C, D) are moving at high speed, their radio wave propagation characteristics are poor, and normally they receive this signal from the nearest radio base station 30-1 (S405).
>, cannot receive well (8406NO>).

Therefore, after a certain time timing, the mobile radio 50
In (B, C, D), the same signal is retransmitted (3407,
Figure 4D).

The wireless base station 30-1 receives the retransmitted operation start signal (3408) and confirms the operation start (S409Y).
ES), the control channel (CH
) (8410).

When the mobile radio devices 50 (B, C, D) receive the permission to send a location registration signal (3411), they check whether it was received successfully (3412), and if the permission was not received successfully. or if reception is not possible (3412 NO), perform the location registration operation again (84
13).

The wireless base station 30- that received this location registration operation start signal
In 1 (3414), when the start of operation is confirmed (S415
If the mobile radio device 50 (B, C, D) cannot receive this well or is unable to receive it (S417.8418NO) , if the number of bad receptions does not reach the specified number n (for example, n = 3), then (
8419NO>, the operations from steps 5413 to 5418 are repeated for a specified number of times n, although the probability is very small.
(S419YES), the mobile radio 50
(B, C, D) determine that they are moving at high speed,
In accordance with the control signal transmission method for high-speed movement mode, it is decided to give up communication with the non-infrared base station 30-1 and communicate with the wide area wireless base station 17 (5420), and start the transmission/reception operation on the wide area communication channel. 5421, Fig. 4F), a control channel (CH) for wide area communication is used to send permission to send a location registration signal and a request to measure the moving speed to the nearest wide area wireless base station, for example, 17-1 (3422) .

This speed measurement request signal is sent out at regular intervals and includes information indicating that the vehicle is in high-speed movement mode.

At the nearest wide area radio base station 17-1 that received this measurement request and location registration permission signal (S423), if the reception condition is good (S424 YES), the mobile radio 50 (B, C).

D) recognizes that it is in high-speed movement mode and sends a location registration signal sending permission signal (3425).

The mobile radio device 50 (B, C) receives the location registration signal transmission permission signal from the wide area radio base station 17-1.

D) (S426) sends a location registration signal (S42
7, Figure 4G).

The wide area wireless base station 17-1 that has received the location registration signal in the high-speed movement mode inspects the received content and stores it (S
428). If this reception quality is above a certain value (S42
9), the wide area wireless base station 17-1 sends mobile wireless devices 50 (B, C,
Measure the electric field value of the signal sent from D) at regular intervals and exchange the barrier with the position registration request signal as the measured value for speed determination! 120 (S430
) Upon receiving the received electric field value and the location registration signal (3431), the gateway exchange 20 determines that it is difficult to measure the speed of the mobile radio device 50 (B, C, D) with only changes in the received electric field, and so Wide area wireless base station 17-2.17-3
A speed measurement request is also sent to the client (S432). The wide area radio base station 17-2, 17-3 that receives this measures the speed (5433) and reports the result to the gateway exchange 20 (3434, Fig. 4H).

Upon receiving this report, the barrier switch 20 receives information from each wide area wireless base station 1
Mobile radio 50 for 71.17-2.17-3 (
B, C, D) are calculated and compared, and the mobile wireless device 50 (B, C, D) is connected to the wide area wireless base station 17.
-1.17-2.17-3 direction velocity V1 respectively
, V2, V3 to determine that it is moving (343
5). Therefore, when the reception quality and location are registered, the barrier switch 20 immediately transmits this speed information to the wide area wireless base station 17.
~1゜17-2. Send to 17-3 3437,438
゜439), wide area wireless base station 17-1.17-2゜17
-3, the wide area radio base station 17-1 receives and stores this, and also receives the registration completion report at the same time.
0 (B, C, D) (S440).

Upon receiving this, the mobile radio device 50 (B, C, D)
The location registration operation ends by memorizing each ID (S442
).

The location registration here is necessary due to the high movement speed.
Location registration is not effective. For this purpose, the direction of movement and speed are measured and the speed information is used.

In the operation of the present invention in this high-speed movement mode,
It is much easier to receive signals from the wide area radio base stations 17-1.17-2.17-3 than in the low-speed movement mode. The nearest wide-area wireless base station 17-1, which received the location registration operation start signal from the mobile radio 150 (B, C, D) in high-speed movement mode, detects the mobile wireless J1 aircraft 50 included in the signal. (
B.

From the speed information of C and D), mobile radio device 50 (B.

C, D) are in high-speed movement mode, and the mobile radio 50 (B.

Execute the transmission method according to the location registration signal transmission method to be transmitted to C and D). In this signal, the wide area wireless base station 17-1 transmits the mobile wireless device 50 (B, C
, D). Such a measure makes it much easier for the mobile wireless devices 50 (B, C, D) to receive the location registration signal transmission permission signal from the wide area wireless base station 17-1 than usual.

In addition, when transmitting and receiving in high-speed movement mode, it is possible to notify the gateway exchange 20 that the mobile radio 50 (B, C, D) is moving at high speed, so that it can be used for making/receiving calls and switching channels during calls, which will be described later. Effective for operation. Furthermore, for example, even if location registration is completed, the mobile radio device 50
(B, C.

From D) onwards, the location registration is repeated at time intervals that follow a certain rule, such as every 30 seconds or every minute, so that incoming calls are reliably executed.

Note that the mobile radio device 50 (B, C) is in high-speed movement mode.

D) may suddenly change to low-speed movement mode.

A person who gets off the car uses mobile radio equipment 50 (B, C).

This applies to cases such as carrying D). In this case, the above-mentioned signal transmission for location registration will continue even though the high-speed movement mode has shifted to the low-speed movement mode. In this case.

In order to prepare for
This is transferred to the gateway exchange 20, and when the gateway exchange 20 receives this and determines that the location is the same as the previously memorized location registration or that a large movement is not permitted, it is transferred to the mobile radio via the wide area wireless base station 17-1. 4150 (B, C, D)
It notifies the user that the device has entered low-speed movement mode and stops repeated location registration. Alternatively, depending on the system, if a downlink control signal is constantly or intermittently sent from the radio base station 30-1, the mobile radio 50 (B,
In C, D), by receiving this, own ID
- The same objective can also be achieved by searching the roam area information collation storage unit 54 and notifying the gateway exchange 20 of the result.

If the mobile radio device 50 (B, C, D) successfully receives location registration signal transmission permission in low-speed movement mode (S406YES, 3412YES).

541BYES>, mobile radio 50 (B, C, D)
uses the uplink control channel while in slow moving mode,
It transmits a location registration signal with its own ID (identification number) (3443, Fig. 4I). Communication using this control channel does not have a transmitter/receiver section dedicated to the control channel.
For example, in the wireless base station 30B shown in FIG. 1E,
Even if the radio transmitting/receiving circuits 46 and 48 are already in use with other mobile radios, multiple channels can be chopped at high speed and transmitted and received simultaneously, ensuring communication at all times. There is.

Upon receiving the location registration signal (3444), the wireless base station 3
At 0-1, the reception quality is inspected and the ID is stored in the ID identification storage section 34 (3445). If the received quality is above a certain value as a result of checking (S446 YES), a location registration request signal is sent to the gateway exchange 20 (344).
7). Upon receiving this registration request signal (3448), the gateway exchange 20 registers that the reception quality and location are stored in the wireless base station 30-1 (3449).

When this registration work is completed, a registration completion signal is sent (3450). The radio base station 30-1 that has received this registration completion signal uses the downlink control channel to
50 (B, C, D) (S451).

Mobile radio 4150 that received the registration completion signal (S452)
(B, C, D) inspect the received content and store the ID (identification number) of the registered wireless base station 30-1 in the ID/roam area information collation storage unit 54 (S453).

With the above operations, the location registration operation is completed and the device enters a standby state for an incoming call.

(2) Calling operation Among the calling operations from the mobile radio 1150 (B, C, D), the low-speed movement mode will be described first.

It is assumed that the mobile radio devices 50 (B, C, D) are powered on and the location registration described in section (1) has been completed. The calling operation when a mobile radio 50 (B, C, D) calls another mobile radio in the same system or a telephone accommodated in the telephone network 10 shown in FIG. 1A is currently performed as follows. Dial operations are performed in the same way as making a call from an existing car phone.

Now, the user lifts up the handset (hang-off) of the telephone section 59 of the mobile vJ radio 50 shown in FIG. 1B. In this state, the mobile radio determines at what timing the calling signal sent from the mobile radio 50 should be sent to the uplink control channel (from the mobile radio 50 to the radio base station 30 (B, C, D, E)). The control unit 58 of the radio device 50 knows this. This is the downlink control channel (radio base station 30 (B)) that has already been sent out from a plurality of radio base stations 30 (B, C, D, E) during the samurai call before the calling state.

This is because the mobile radio device 50 has captured the mobile radio device 50) from C, D, and E) and recognizes the timing of the control signal included therein when it is possible to make a call.

Also, in mobile radio 50, all functions shown in FIG. 1B are active. In particular, synthesizer 55 1 + 5
J 2 + . Also, the control unit 5
At step 8, a control signal is sent out to oscillate a local oscillation frequency for receiving a downlink control channel. On the other hand, mobile radio device 50
Radio base stations 30-1, 30-2. ...,
30-n, if there is only one radio in the radio base station, the next operation is to receive an uplink control signal from the mobile radio 8150 depending on whether it is communicating with another mobile radio. I am working on this.

First, at the wireless base station 30 (B, C, D, E) that is communicating with another mobile wireless device at that time, the wireless base station 30 (B, C, D, E)
(B, C, D, E) Reception and transmission switching controls n
65c, 67C, and synthesizer 55-1.55-
2.56-1.56-2 are in operation, of which 55
-1.56-1 outputs the local oscillation frequency necessary for communication with other mobile radios, and synthesizers 55-2 and 56
-2 outputs a local oscillation frequency that requires communication on the control channel. Therefore, the wireless base station 30 (B, C
, D, E), and is ready to immediately respond to calls from mobile radios 50 located in the vicinity of mobile radios 50.

Next, the radio base stations 30 (B, C, D,
In E), the reception state of the radio reception circuit 68 is fixed so that it can receive the control channel. Therefore, the wireless transmitting circuit 66 and the like are inactive, and only the wireless receiving circuit 68 and synthesizer 55-1 are in operation.

Now, under the above conditions, the mobile radio device 50 transmits a call request signal. This call request signal including the ID of the mobile radio device 50 is created by the control unit 58 in FIG. 1B,
The signal is sent to the wireless transmission circuit 66. The radio transmission circuit 66 modulates the signal, and after amplifying it to an appropriate level, the transmission mixer 6
1, the signal is added to the antenna and sent to the wireless base station 30-1, etc.

The radio base station 30-1, etc., which has successfully received this signal, inspects the content of the received signal and
1 is stored in the ID identification storage unit 34, and the location registration has been completed.No movement! ! After confirming that the call is from mobile radio 1 50, and adding the reception quality value and empty channel number received at radio base station 30-1,
50, requesting that the mobile radio 50 determine the communication channel number to use. If wireless base station 30
- If the mobile radio device that is not stored in the storage unit 34 of 1 (for example, a mobile radio device that is moving at high speed and has stopped transmitting a location registration signal > 50), it is stored at this point and added. The information sent is returned to the mobile radio device 50. However,
In this case, the timing of the reply is determined in advance in various ways, such as in relation to the reception quality as described in the previous section, in order to avoid interference with replies from other radio base stations.

On the other hand, these surrounding wireless base stations 30-1.30=2.・
..., the mobile radio device 5 that received the response signal from 30-n.
0, the number of radio base stations to which diversity transmission and reception should be performed is determined by considering the call traffic state at that time. In other words, the wireless base stations 30-1, 30-2. −． 30
The content of the response signal from -n is inspected, and if the call quality satisfies a certain standard, the moving direction and speed of the mobile radio device 50, and the diversity transmission/reception provided in the mobile radio device 50 are confirmed. Wireless base stations 30-1, 3C)-2 and 30-
Suppose that we decide to communicate with n. In this case, the mobile radio device 50 uses the uplink control channel to
1. Notify 30-2 and 30-n of the communication channel number to be used, and request them to wait on the channel with the same number.

These radio base stations 30-1, etc. each transmit radio base stations 30-1 to 30-1 at the timing instructed by the control signal.
3C)-n reports that it is waiting on the indicated communication channel.

Reports (transmissions) to the mobile radio device 50 from the plurality of radio base stations 30-1 to 30-n described above may be transmitted at the same time. However, in this case, it is necessary to set different occupied frequency bands outside the band and to allow the mobile radio device 50 to identify which radio base station 30 has transmitted the signal.

Here, even if the control signals are reported to the mobile radio device 50 at the same time, they will not cause mutual interference upon reception. The reason is as follows. In other words, the contents of the signals are almost the same, and the different parts are small parts related to the radio base station's ■D low signal, etc., and the frequency arrangement of the control signal given to each radio base station 30 is shown in FIG.
This is because it is possible to make the difference as shown in a). If the above measures cannot be taken depending on the system, the barrier exchange 20 may instruct each radio base station 30 to shift the timing of transmitting the control signal, or the barrier exchange 1120 may instruct each radio base station 30 to shift the timing of transmitting the control signal. Base station 30
The control signal is sent to only one of the stations, and the radio base station 30 sends an incoming call signal to the mobile radio 50, and the mobile radio 50 that receives this control signal responds to the incoming call. Along with the signal, multiple wireless base stations 30 in the vicinity
There are various methods, such as sending a communication permission signal to the destination and then having the mobile radio 50 perform the same operation as when making a call.

The flow of the calling operation will be described above with reference to FIGS. 5A and 5B. However, only one radio base station 30 (30-1>) communicating with the mobile radio 1fi50 is shown.The barrier switch 20 and the radio base station 30-1 have already started operating, and the mobile radio 150 has also started operating. The location registration work explained in Figures 4A and 4B has been completed.The handset is lifted (off-hook) and the uplink control channel (
This off-hook signal and the mobile radio 5
ID (identification number) of 0 is sent (S231, 5th A
figure).

The radio base station 30-1 that received this sends the mobile radio 150
, and confirms that it is already stored in the ID identification storage unit 34 (3232>).

Therefore, the radio base station 30-1 adds the reception quality value received from the mobile radio device 50 and the current empty channel number, and sends it out as a call response signal using the downlink control channel (S233>).

The mobile radio device 50 that has received such call response signals from a plurality of radio base stations 30 examines the value of reception quality from each radio base station 30, and selects a radio base station 30-1 that is capable of diversity transmission and reception. ~30-n, and confirms the empty channel (5234), and sends a signal specifying the communication channel to be used (S235>.Here, the wireless base station 30
-1, channel CH1 is sent. The radio base station 30-1 confirms that the communication channel specified by the mobile radio 50 is free, switches to that channel (3236), and sends a channel switching completion report using the downlink control channel. (S237). Upon receiving this switching completion report (3238>, the mobile radio@50 waits for a dial/° tone on the specified call channel (323)
9>.

On the other hand, the wireless base station 30-1 sends a calling signal to the gateway exchange 20 (3240>. Upon receiving this, the gateway exchange 20 inputs the ID of the mobile radio 50 and the communication quality.
The D identification is stored in the storage unit 24, and the switch group 23, for example 5W1-1, is turned on under the control of the communication path control unit 21 to connect the wireless base E 30-1 to the exchange 11 of the telephone network 10 (S241).

Therefore, a dial tone is sent from the exchange hall 11 side via the switch group 23 of the barrier exchange 120 (S24
2, Figure 5B).

This dial tone is transferred by the radio base station 30-1 through channel CH1 (downlink) (S243), and received by the mobile radio 50, confirming that a call has been set up (S244>.Moving The radio 50 sends out a dial signal for the destination using channel C+-11 (upstream) 5245>, and the exchange 11 operates to set up a communication path to the destination on the telephone network 10 (S247> Thereafter, a telephone call is made (S248>).

When the call is completed, the handset goes on hook (S
249>, on-hook signal and end-of-call signal are mobile radio tf
f150 using channel CHI (uplink) (S250>. As a result, the radio base station 30-1 confirms the end of the call 5251> and transmits the end of the call to the barrier switch 20. Therefore, the barrier switch 20 sends the switch Switch 5W1-1 of group 23 is turned off and the call ends (S252)
.

Next, a call originating from the mobile radio device 50 in the high-speed movement mode will be explained. Mobile radio 150 (B, C.

D, hereinafter simply referred to as mobile radio 50) has already registered its location with wide area radio base station 17, this mobile radio 50 will send a call signal to wide area radio base station 17 from the beginning. The operation at this time is that of the radio base station 30 (B.

C, D, E (hereinafter simply referred to as radio base stations 30)) is simply replaced with the wide area radio base station 17, so the details will be omitted.

Next, although the location registration is directed to the wireless base station 30 due to some reason, the mobile wireless device 50 is moving at high speed and a call is made in this state as shown in FIGS. 5C to 5C. This will be explained using Figure 51.

The mobile radio device 50 starts operating and communicates with the radio base station 30-1 and the wide area radio base stations 171, 17-2, .
17-3 and barrier switch 20 have already started operating, and the 4th
The location registration explained in FIGS. 8 to 41 has been completed.

The handset of the mobile radio FM 50 is picked up (off-hook), and the off-hook signal and the ID (identification number) of the mobile radio 50 are transmitted using the uplink control channel (CH) (S501, 5th C). figure). Since the mobile radio 1150 itself does not know that it is moving at high speed, it transmits the off-hook signal in the normal low-speed movement mode.

Upon receiving the off-hook signal, the wireless base station 30-1 detects the ID of the mobile wireless device 50 and confirms that it is already registered in the ID identification storage unit 34 (3502).
>.

Therefore, the radio base station 301 adds the reception quality Idi and the current empty channel number from the mobile radio device 50, and sends it as a call response signal using the downlink control channel (S
503). At the same time, the wireless base station 30-1 checks whether the ID signal from the mobile wireless device is successfully detected (5504), and if it is not successfully detected (8504 NO), an off-hook signal is sent. will be sent again (S505). Wireless base station 3
The call response signal from 0 is received at mobile radio tff50 a'3 (S506), and if the reception quality is not good or cannot be received at all (3507 NO
> Repeat sending a calling signal a specified number of times at a predetermined interval (3508NO1S501 to 5503,
5506, 3507).

When the predetermined number of times is reached (3508 YES), the mobile radio device 50 recognizes the high-speed movement mode, gives up communication with the radio base station 30-1, and performs communication with the wide-area radio base station 17-1 in the high-speed movement mode. It is decided to transmit and receive the call signal using the control channel (5509, Fig. 5D), and the operation of transmitting and receiving the call signal using the wide area communication channel is started (S51).
0>. Therefore, the mobile radio device 50 simultaneously transmits a request for empty channel information and a speed measurement request on the control channel, and waits for reception on the control channel (3511).

The wide area wireless base station 17-1 receives the empty channel information request signal and the speed measurement request signal (S512), and if it is able to successfully receive both signals (S51
3YES), the wide area wireless base station 17-1 recognizes that the mobile wireless device 50 is moving at high speed, so it notifies the number of the communication channel that is vacant for the high speed mobile E-mode and uses that channel. Using the control channel, the mobile radio Ia 50 sends empty channel information instructing it to prepare for a call using the high-speed mobile radio Ia 50 (3514, FIG. 5E). Receive information (S515>. This empty channel information includes communication channels C1-11016 and C1-1 for high-speed movement mode.
This includes that 1102 and Cl-1103 are vacant.

Upon receiving the speed measurement request, the wide area wireless base station 17-1 measures the speed of the mobile IJI wireless device 50, and transmits the speed measurement result and the calling signal to the gateway exchange 20 (S516).
.

The barrier switch 20 that received this calling signal and the speed measurement result
Then (S517), if it is determined that it is difficult to measure the speed of the mobile radio device 50 using only the speed measurement results from this wide area wireless base station 17-1, the surrounding wide area wireless base stations 17-2.
A speed measurement request is also sent to 17-3 (3518).

Wide area wireless base station 17-2.1 that received this speed measurement request
In step 7-3, the speed measurement is performed (5519), the measurement result is reported to the barrier exchange 20 (5520), and the barrier exchange 20 receives this (3521).

The mobile radio device 50 that has received the empty channel information sends out a signal specifying channel CH101 as a communication channel5.
522), the wide area wireless base station 17-1 that receives this confirms that the specified channel C11101 is vacant and switches to enable transmission and reception using CH1101 (S5
23).

When switching to the designated channel is completed in the wide area radio base station 17-1, a report thereof is sent out on the downlink control channel (S524, FIG. 5F). The mobile radio Ia 50 that receives this confirms that the channel switching is completed and waits for a dial tone to be sent from the barrier exchange 120 via the wide area radio base station 17-1 (S52
6).

Transmit speed measurement results to wide area wireless base station 17-1.17-2.1
The barrier switch 20 receives the signal from the wide area wireless base station 17-1.
The speed of the mobile radio device 50 with respect to each wide area radio base station 17-1゜17-2.
．． The speeds IjV1, V2, and V in the direction of 17-3, respectively.
3, it is calculated that the vehicle is moving (S527). This information is immediately transmitted to wide area wireless base station 17-1.17-2゜1.
7-3 (3528).

The wide area wireless base station 17-1.17-2.17-3 receives the speed information from the barrier switch 20 and stores it (35
29.3530>.

When the wide area wireless base station 17-1 sends a channel switching completion report to the mobile wireless device 50, it requests the barrier switch 20 to send a call signal (3531), and the barrier switch 1120 that received this request moves. The ID of the radio device 50 is detected, the communication quality is stored in the ID identification storage section 24, and the communication path control section 21 controls the switch group 23, for example, 5WI.
Turn on -1B and call wide area wireless base E17-1!
110 is connected to the exchange 11 (S532).

Therefore, a dial tone is sent from the exchange 11 side via the switch group 23 of the barrier exchange [20] (S53
3, Figure 5G).

This dial tone is transferred from wide area wireless base station 17-1 through channel Cl-1101 (downlink) (S5
34), the mobile radio 50 receives the message and confirms that a communication path has been established (S535). Mobile heat II machine 5
0 sends out a destination dial signal using channel CH101 (upstream) 3536>, wide area wireless base station 17
-1 (8537), the exchange 11 operates and a call path to the destination on the telephone network 10 is set up (3538>). When the call is completed (3539), The handset is on hook (354
0), the on-hook signal and the end-of-call signal are sent to the mobile radio 50.
is sent out using channel CH101 (upstream) from (
S541). As a result, the wide area wireless base station 17-1 confirms the end of the call (5542) and notifies the gateway exchange 1120 of the end of the call. Therefore, in the barrier exchange +fi20, the switches 5W1-1B of the switch group 23 are turned off, and the call in the high-speed movement mode is ended (S543).

When the radio base station 30-1 receives an off-hook signal in the low-speed movement mode and successfully detects the ID of the mobile radio 50 (5504 YES, FIG. 5C) When the mobile radio 150 also successfully receives the call response signal (S507YES)
, the wireless base station 30-1 adds the reception quality value received from the mobile wireless device 50 and the current empty channel number, and sends it as a call response signal using the downlink control channel while in the low-speed mobile mode (S544, Figure 5H).

The mobile radio device 50 that has received such a call response signal from the radio base station 30-1 examines the reception quality value from each radio base station 301, and selects a radio base station 30-1 that is capable of diversity transmission and reception, for example. 1 to 30-n, check for empty channels (5545), and send a signal specifying the communication channel to be used (3546).Here, radio base station 3
0-1 (descriptions of 30-2 to 30-n are omitted), a signal specifying channel C1]1 is sent. The radio base station 30-1 confirms that the communication channel specified by the mobile radio 50 is free, switches to that channel (3547), and sends a channel switching completion report using the downlink control channel. (3548). Upon receiving this switching completion report (S549), the mobile radio 50 waits for a dial tone on the designated communication channel (355).
0).

On the other hand, the wireless base station 30-1 sends a calling signal to the gateway exchange 20 (S551>. Upon receiving this, the gateway exchange 20 inputs the ID of the mobile radio 50 and the communication quality.
The D identification is stored in the storage unit 24, and the switch group 23, for example 5W1-1, is turned on under the control of the communication path control unit 21 to connect the wireless base station 301 to the exchange 11 of the telephone network 10 (S552).

Therefore, a dial tone is sent from the exchange 11 side via the switch group 23 of the barrier exchange 20 (S55
3, Figure 51).

These dial numbers 1 to 1 are transferred by the wireless base station 30-1 through the channel CHI (downlink) for low-speed movement mode (S554), received by the mobile wireless device 50, and are used for telephone calls.
is set (S555). The mobile radio device 50 sends out a destination dial signal using channel CI-+1 (uplink) 3556), and then sends the dial signal to the radio base station 30-
1 (S557), the exchange is operated by] 1, and a communication path to the destination on the telephone network 10 is set up (S557).
8558). Thereafter, a call is made (S559).

When the call is completed, the handset goes on hook (S
560), the on-hook signal and the end-of-call signal are mobile radio [5
0 using channel CH1 (upstream) (S
561). As a result, the radio base station 30-1 confirms the end of the call (3562) and notifies the gateway exchange 120 of the end of the call. Therefore, in the barrier switch 20, the switch 5W of the switch group 23 is
1-1 is turned off and the call ends (3563).

(3) No movement beyond the incoming call operation! ! Although the present invention has been described regarding the origination of a call from the machine 50, it is possible to make a call without using the wide area pre-WA base station 17.
j! 6A and 6 show the flow of the operation of receiving a call to the mobile radio 1150 when the base station 30 is used to send an incoming call signal.
This will be explained using FIG. B and FIG. 6C. Here, one of the many wireless base stations 30, 30-1, is shown as a representative. For example, a mobile radio device 50 or the like existing in the vicinity of the radio base station 30-1 or the like is on standby on a control channel that is commonly used by all the idle base stations 30.

In FIG. 1A, it is assumed that an incoming call signal addressed to the mobile radio 50 enters the barrier switch 20 from the telephone network 10. It is assumed that the ID identification storage unit 24 in the barrier switch 20 inspects the incoming call signal and searches for the ID of the called party, and finds the wireless base 830 (plurality) whose current location is registered. Then, the mobile i11 radio 5o simultaneously sends an incoming call signal to all the radio bases 130 whose locations are registered via the communication control unit 21 (S271, FIG. 6A).

Each radio base station 30 that received this signal
D identification storage unit 34 (C) is searched and I of the mobile radio device 50 is searched.
When it is confirmed that D is stored there, it uses the downlink control channel to transmit an incoming call and call channel designation request signal to mobile radio 1m50 using the ID of radio base station 30-1.
is added and sent.

The mobile radio device 50 is called to other radio base stations 30 in a similar manner at substantially the same time (S272).

Note that even if the incoming call signal is sent out simultaneously from a plurality of radio base stations 30, it will not cause mutual interference when received by the mobile radio t150. This is because (a) the contents of the signals are almost the same, and the different parts are small parts such as ID signals for identifying the radio base station 30; and (b) the frequency arrangement of the control signals given to each radio base station Q30. This is because it is possible to make them different as shown in FIG. 2(a).

If the above measures are not taken depending on the system, there may be a method of shifting the timing of sending the incoming call signal from the barrier exchange 120 to each of the radio base stations 30, or a method of transmitting the incoming call signal from the barrier switch 20 to each of the radio base stations 30. The incoming call signal is sent to only one of the stations, and the incoming call signal is sent from that radio base station 30 to the mobile radio 50, and the mobile radio 50 that receives this signal sends an incoming call response signal. There are various methods, such as sending a communication availability signal to a plurality of nearby wireless base stations 30 and having the mobile wireless device 50 perform the same operation as when making a call.

Now, this incoming call signal is received by the mobile radio device 50 that is on standby on the control channel, and after searching the received signal quality and signal content and confirming that it is the incoming call signal addressed to the mobile radio device 50. (S273>, the mobile radio device 50 selects each radio base station 30-1.3 in consideration of the nearby call traffic state.
0-2. . . , determines a communication channel that allows communication with the wireless base station 30-n, and uses the uplink control channel to communicate with the wireless base station 30-n.
1.30-2. ..., send to 30-n (327
4>.

At the same time, each synthesizer 55-1.55-2 and 56-1.56- in the mobile radio device 50 (FIG. 1B)
2. ..., 56-n and selector switch 64-1.64-
2 and the reception and transmission switching controllers 65C and 67G are operated, for example, communication channel C1-11 (wireless base station 3O-1ffl), communication channel Cl-12 (for wireless base station 30-2), . . . ....

The communication channel n (for wireless base station 30-n) is brought into a state in which transmission and reception are possible. Each radio base station 30-1 to 30-n that has received an uplink control channel from the mobile radio device 50 inspects the quality of the received signal, and
10 is confirmed (S275), and an incoming call response signal is sent to the barrier switch 20 (3276>).

This incoming call response signal to the gateway exchange 20 also includes a signal to the switch group 23 for setting a communication path. Then, upon receiving this incoming call response signal, the barrier switch 20 will:
It is checked whether the ID of the mobile radio device 50 is already stored in the ID identification storage unit 24, and if it is not stored, the ID is stored in the ID together with the quality inspection data of the radio base station 30-1.
5277>, and sends a response confirmation signal including the stored ID etc. to the wireless base station 301 etc. (3278).

The radio base station 30-1 that received this response confirmation signal confirms that the ID of the mobile radio TFI 50 has been correctly registered (3279), and checks whether the channel specified by the mobile radio 150 is free. It examines whether or not the switching is possible (328C, Fig. 6B), and sends the resultant signal indicating whether or not the switching is acceptable to the mobile radio 50 via the downlink control channel (
S281>.

If this switching approval/disapproval signal is received (8282), the mobile radio 50 does not allow switching of the specified channel because there are no free channels (3283NO).
, returns to step 5274 and specifies another communication channel (S274). If the specified channel is an empty channel and switching is approved (8283YES)
), switches to that channel, and sends a channel switching completion report using the uplink control channel (S284>).

It was confirmed that the channel was switched to an empty channel (S285
>The wireless base station 30-1 switches to this channel and
A channel switching completion signal is sent to the barrier exchange 120 (8286>).

When the barrier switch 20 receives the channel switching completion signal, it operates the call path control unit 21 and switches the switch group 23 in order to set up a call path to the telephone network 10 via the switch 11.
For example, turn on 5WI-1 and connect wireless base station 30-
1 and the telephone network 10 (3287). Therefore, a calling signal is sent from the telephone network 10 side via the gateway switch 20 (3288, FIG. 6C), and this is transmitted to the wireless base station 30-
1 (5289>. Then, a calling bell signal is sent out on the set communication channel C[]1, and the mobile radio 50
A ring tone is generated (S291>).

When the handset on the mobile radio 50 side is lifted up (off hook) by this ring tone (3292), channel C
)-11, an off-hook signal is sent to the wireless base station 3.
0-1 (3293>), received by the gateway exchange 20 (3294), and a call is started between the telephone network 10 and the mobile radio device 50 (S295>).

When the call ends, the handset is put down and the on-hook signal and end-of-call signal are sent to the wireless base station 30 via channel CH1.
-1 (S296), and the radio base station 30-1, which confirms the termination of the call, transfers this signal (S297>. Operate the control unit 21 and switch group 2
Turn off 5W1-1 of 3 and end the call (3298>.

In the above explanation, 1. Even in a system in which a control transmitter/receiver installed in the wireless base station 30-1 is used as a communication channel, the method of repeatedly switching the transmitting and receiving channels in time as explained in the configuration of the mobile wireless device has already been used. Even if the mobile radio device is currently communicating with another mobile radio device, it is possible to communicate with a newly incoming mobile radio device using the control channel (see FIG. 1E).

In the system exemplified in (2) call operation and (3) call reception operation described above, the wireless channels are clearly separated into a wireless channel dedicated to control and a wireless tunnel dedicated to calls. Ta. However, in some actual systems, this distinction is not clear. In such a system, it is possible to use a specific communication channel as the control channel described above and perform the same operation.

Next, an explanation will be given of the operation when the mobile radio 50 (on standby), which is moving at high speed within the service area, receives an incoming call.

First, an incoming call when the mobile radio 50 is in the high-speed moving mode and its location is registered with the wide-area wireless base station 17 is different from an incoming call in the low-speed moving mode as explained in FIGS. 68 to 6C. The same is true. In other words, the wide 1II1 wireless base station 17 may be replaced with the wireless base station 30 to perform the call receiving operation.

Next, we will explain a call that occurs when, for some reason, the mobile radio 150 is moving at high speed (high-speed movement mode) but its location is registered with the radio base station 30. If a person who is walking with the radio 50 gets into a car and starts driving, there is an incoming call.
This is an example. The flow of operation in this case will be explained with reference to FIGS. 6D to 6.

The barrier exchange that receives the incoming call signal from the telephone network 10 is at 20 (
S601, FIG. 6D), searches the ID identification storage unit 24,
After confirming that the called party is within the mobile communication network (S
602), the mobile radio device 50 checks whether it is in the high-speed movement mode or not. If you confirm that you have registered your location in one or more of the backs of 30-n,
The incoming call signal is transmitted from the barrier switch 20 to the wireless base station 30-1, etc. (S604).

When the radio base station 30-1 receives this and confirms that the incoming call signal is addressed to itself based on the ID (S605), it adds the ID of the radio base station 30-1 to the mobile radio 150 and adds the control channel ( Transmit an incoming call signal (S
606).

The mobile radio 150 cannot receive the incoming call signal sent from the radio base station 30-1 well (S6
07.3608NO>, and if the radio base station 30-1 etc. does not receive an incoming call response from the mobile radio device 50 even after a predetermined period of time (8609NO), it sends an incoming call signal and sends an incoming call signal to the mobile radio device 50. The reception is repeated until the specified number of times is reached (S61C, 5611, Fig. 6E).

When the number of incoming call signals sent reaches the specified number of times (S610YE)
S, S611YES>, in wireless base station 30-1, etc.
It is determined that the mobile radio device 50 is outside the service zone of the radio base station 30-1 or the like or is moving at high speed,
The gateway exchange m20 is informed that the call receiving method for high-speed movement mode should be used (S612>).

As a result of receiving and analyzing information from the radio base station 30-1 etc. that indicates that the mobile radio device 50 is moving at high speed, the gateway switch 20 determines that the mobile radio device 150 is moving at high speed, Determine use of high-speed movement mode (S613
). 10 searches the identification storage unit 24 to check whether the mobile radio device 50 has registered its location in the high-speed movement mode, and determines whether the location has been registered with any of the wide area wireless base stations 17 that are in charge of communication in the high-speed movement mode. If the current location cannot be estimated because the mobile radio device 50 is not registered as a VIP (3614 NO>, please search 5615 to see if the mobile radio device 50 is registered as an important person (VIP)), and if it is not a VIP (3615 NO>,
If the caller is notified that the called party's location is unknown (5616), and if it is VI PF, 1i56 (S615YES), an incoming call signal is sent through all wide area wireless bases 817 (S617). ).

The mobile radio 50 is confirmed to be in high-speed movement mode (S
603YES), or if it is possible to estimate the location registration after deciding on high-speed movement mode, (5614Y
ES), the gateway switch 20 estimates the current location of the mobile radio 50 to be in the service area of the wide area radio base station 17-1 (3618, FIG. 6F), and determines the I of the destination mobile radio 50.
An incoming call signal with D added thereto is sent to the wide area wireless base station 17-1 (S619).

Wide area wireless base station 17 that received this request to send out an incoming call signal
In -1, the incoming call signal and empty channel information in high-speed movement mode are transmitted to the mobile radio device 50 (S623).
.

This incoming call signal is judged to be moving at high speed, is changed to the wide area incoming call standby control channel for high speed movement mode, and is received by the mobile radio 50 in standby (3622°8623), and the quality of the received signal is The content of the signal is searched and it is considered whether the incoming call signal is good or not (S624), and after confirming that the incoming call signal is addressed to the mobile radio 50 (S625, the sixth
(Fig. G), the mobile radio device 50 determines a communication channel, for example CHlol, with which it can communicate with the wide area wireless base station 17-1, taking into consideration the nearby voice traffic state, and uses the uplink control channel to communicate with the wide area wireless base station 17-1. Send to 17-1 (S
626). At the same time, each synthesizer 55-1, 55-2 and 56- in the mobile radio device 50 (FIG. 1B)
1.56-2. ...56-〇 or selector switch 64-1
．． 64-2 and the reception and transmission switching controllers 65G and 67C, for example, the communication channel CH101 (
For the wide area wireless base station 17-1), preparations are made to transition to a state in which transmission and reception are possible. The wide area radio base station 171 that received the uplink control channel from the mobile radio 50 inspects the quality of the received signal and transmits the transmitted mobile radio 115017) I
After the call is confirmed (S627), an incoming call response signal is sent to the gateway exchange 20 (8628).

This incoming call response signal to the gateway exchange 20 also includes a signal to the switch group 23 for setting a communication path. Then, upon receiving this incoming call response signal, the barrier switch 20 will:
Reconfirm whether or not the ID of the mobile radio device 50 is already stored in the ID identification storage unit 24. Normally, it is stored in the ID identification storage unit 24, but if it is not stored, the wide area radio base station 171 ID identification storage unit 24 along with the quality inspection data of
and sends a response confirmation signal including the stored ID etc. to Hiro 1FJ and wireless base station 17-1 (S630).
.

The wide area wireless base station 17-1 that received this response confirmation signal confirms that the ID of the mobile wireless device 50 has been correctly registered (3631), and checks whether the channel specified by the mobile wireless device 50 is free. After confirmation, a switching confirmation signal is sent to the mobile radio device 50 via the downlink control channel (3632).

A switching confirmation signal to this designated channel was received (S63
3) Since there are no free channels in the mobile radio device 50,
If switching of the specified channel is not allowed, select (3)
634 NO>, the process returns to step 5626 and another communication channel is designated (S626).

If the specified channel, for example CHlol, is an empty channel and switching is approved (S634YES)
, switches to that channel, and sends a channel switching completion report using the uplink control channel (3635).

After confirming that the wide area wireless base station 17-1 has been switched to an empty channel, it switches to this channel and sends a channel switching completion signal to the barrier exchange t120 (S
636).

When the barrier switch 20 receives the channel switching completion signal, it operates the call path control unit 21 and switches the switch group 23 in order to set up a call path to the telephone network 10 via the exchange 111.
5W11B is turned on to connect the wide area wireless base station 17-1 and the telephone network 10 (3637). So telephone network 1
A paging signal is sent from the 0 side via the barrier switch 20 (S63B, Fig. 61.1), and this is sent to the wide area wireless base station]
71 for confirmation (S639).

Therefore, a paging bell signal is sent on the communication channel CH101 for the high-speed mobile phone (5640), and mobile vJS
1liLl raw-i with S machine 50 (S641).

When the handset on the mobile radio 50 side is lifted (off hook) due to this ring tone (S642), channel C
An off-hook signal is sent at H101, transferred to the wide area wireless base station 17-1 (S643'), and sent to the barrier switch 2.
0 (S644), and a call is started between the telephone network 10 and the mobile@wireless device 50 (S645).

When the call ends, the handset is put down, an on-hook signal and a call end signal are sent to the wide area wireless base station 17-1 via channel CH101 (3646), and the wide area wireless base station 17-1 confirms the end of the call. , transfer this signal (56
47). Upon receiving the on-hook signal and the call termination signal, the barrier exchange 120 operates the communication path control unit 21 and turns off 5W1-1B of the switch group 23 to terminate the call (S6
48).

The mobile radio 50 is in low-speed movement mode and the radio base station 3
If the 0-1 etc. successfully receives the incoming call response signal from the mobile radio 50 (S609YES, FIG. 6D), or
If the mobile radio device 50 successfully receives an incoming call signal from the radio base 830-1 etc. in low-speed movement mode, (3608Y
ES, FIG. 6D), after searching the quality and content of the received signal and confirming that it is an incoming call signal addressed to the mobile radio 6150, the mobile radio 150, taking into consideration the nearby call traffic state, Determine a communication channel in low-speed movement mode that allows communication with the wireless base station 30-1, etc., and transmit to the wireless base station 30-1, etc. using the uplink control channel (S649).
.

At the same time, each synthesizer 55-155-28 and 56-1.56-2 in the mobile radio device 50 (FIG. 1B)
．． 56-3, changeover switch 64-1, 64-2, and reception and transmission switching controller 650'! '3 and 67C, for example, communication channel CHI (wireless base station 30-
1) to enable sending and receiving. mobile radio 5
Radio base station 30- which received the uplink control channel from
In the first class, the quality of the received signal is inspected, the ID of the mobile radio 1150 that made the call is confirmed (S650), and an incoming call response signal is sent to the barrier exchange t120 (3651).

This incoming call response signal to the barrier exchange e120 also includes a signal to the switch group 23 for setting a communication path. When this incoming call response signal is received, the barrier switch 20 determines that the IDIfi of the mobile wireless device 50 has already been registered in the ID identification storage unit 2.
4, and if it is not stored, it is registered in the ID identification storage unit 24 along with the quality inspection data of the wireless base station 30-1 (5652), and contains the stored ID, etc. The response confirmation signal is sent to the wireless base station 30-
It is sent to the first prize (S653).

In the wireless base station 30-1 etc. that received this response confirmation signal,
Check that the ID of the mobile radio 150 has been correctly registered (5654), check whether the channel specified by the mobile radio 1150 is free, and consider whether or not to switch (5655, Fig. 6J), and the result. A signal indicating approval or disapproval of switching is sent to the mobile radio device 50 via the downlink control channel for low-speed movement mode (S656).

When the mobile radio device 50 receives this switching approval/disapproval signal (S657) and does not approve switching of the specified channel because there are no free channels, (3658 NO>
, returns to step 5649 (Fig. 6) and specifies another communication channel (S649). If the specified channel is a free channel and switching is permitted, (
365BYES1 (Figure 6J), switches to that channel and sends a channel switching completion report using the uplink control channel for low-speed movement mode (3659).

Confirmed that the channel was switched to a free channel (5660
) The wireless base station 30-1 switches to this channel and
A channel switching completion signal is sent to the barrier exchange 4120 (S661).

When the barrier exchange Ia 20 receives the channel switching completion signal, it operates the communication path control unit 21 and switches the switch 12 in order to set up a communication path to the telephone network 10 via the exchange 11.
The wireless base station 30-1 and the like are connected to the telephone network 10 by turning on the wireless base station 30-1 and the like (3662). Therefore, a calling signal is sent from the telephone network 10 side via the barrier switch 20 (3663, shown in the sixth figure), and this is sent to the wireless base station 30-1.
etc. (S664). Then, a calling bell signal is sent out on the set communication channel CH1 for the low-speed movement mode, and the mobile radio 50 generates a calling & (3666).

When the handset on the mobile radio 50 side is lifted up by this ringing tone (off-hook) (S667), an off-hook signal is sent out on channel 1/channel C1]1, and
0-1 etc. (366B>), is received by the barrier switch 20 (3669), and is transferred to the telephone network 10 and the mobile radio device 50.
A call is initiated between the two parties (5670).

When the call ends, the handset is put down and the on-hook signal and end-of-call signal are sent to the wireless base station 30 via channel CH1.
-1 etc. (3671), and the wireless base station 30-1 etc. that confirms the end of the call transfers this signal (3672).

Upon receiving the on-hook signal and the call termination signal, the barrier switch 20 operates the call path control unit 21 and turns off the switches 5W1-1, etc. of the switch group 23 to terminate the call (3673).

In the above explanation, even in a system in which a control transceiver installed in the radio base station 30-1 etc. is diverted to a communication channel, the transmission and reception channels are repeatedly switched over time as explained in the configuration of the mobile radio device. The method makes it possible to communicate with a newly called mobile radio using the control channel even if it is already in communication with a third mobile radio (see FIG. 1D).

Note that the mobile radio 50 (B.

C, D) may change from high-speed movement mode to low-speed movement mode. As a countermeasure in this case, it is possible to adopt either a method of maintaining the high-speed movement mode only for the call, or a method of detecting the speed and shifting to the low-speed movement mode.

When maintaining high-speed movement mode, no special explanation is needed as a system technology; however, when detecting speed and transitioning to low-speed movement mode, use the mid-call channel switching technique described below. Become.

(4) Application of diversity during low traffic times Due to the calling/receiving operations as explained in sections (2) and (3), the general telephone 1 mA and mobile radio 5 in the telephone network 10
0 (or between two moves in the system Ij!
Assume that communication (between machines) has started.

In this case, the mobile radio 50 does not communicate! ! There is only one base station 30, and the communication 1 in the system is in a busy state, at least in the vicinity of the mobile radio device 50].The busy state is assumed to be busy/hourly but not at the busiest time.
The same implementation is possible even when the number of wireless base stations 30 is two or more).

Then, the mobile radio device 50 starts preparing to perform diversity transmission and reception. Therefore, the control unit 58 in the mobile radio device 50 shown in FIG. 1B sends an operation start command signal to each of the transmission switching controller 67G and the reception switching controller 65C, and also sends an operation start command signal to the currently working synthesizer 55-
1 and 56-1, synthesizers 55-n and 5
6-n requests frequency oscillation so that control channel C)-150 can be transmitted and received. At the same time, the control unit 58 starts sending control signals to the wireless transmission circuit 66.

This control signal includes the ID of the mobile radio device 50, the type of communication (type of voice, data, etc.), and the channel number currently in use, and is transmitted to the surrounding wireless base station 30 that is not currently in communication. request to start the diversity transmission/reception operation. However, the above conditions for the radio base station 30 are such that if the radio base station 30 has a configuration as shown in FIG. 1E, FIG. 1F, first diagram, and FIG. 1L, Even if the user is communicating with a third party's mobile wireless device, it is possible to communicate with a new mobile wireless device, so this condition can be relaxed.

As a result of the above operation, the output of the transmitting mixer 61 of the mobile radio 50 is transmitted by the control channel C)-150 in addition to the currently communicating channel CH1, while the receiving mixer 63 receives the currently communicating channel CH1. In addition to receiving the communication channel CH1, it is also possible to receive the control channel. This is explained in detail in the operation of channel switching during a call in section (5).

The control signal transmitted from the mobile radio device 50 is sent to a plurality of nearby radio base stations 30-2, 30-3.・
..., 30-n. Then, the radio base station 30-2, which is one of them, inspects the quality of the received signal and the content of the signal, and finds that the quality of the signal received from the mobile radio device 50 is above a certain value, and immediately starts communication. When it is determined that the quality will not deteriorate and there is no possibility of interference, the ID of the radio base station 30-2 and the usable radio channel number (for example, Cl -12) Control signals including
50 and reports that diversity transmission/reception is possible.

This signal is received by the radio receiving circuit 68 of the mobile radio device 50 and transmitted to the control section 58. The control unit 5 that received this
In step 8, as a result of examining the signal sent from radio base Q30-2, it is determined that it is appropriate to perform diversity transmission and reception, and transmits the signal to synthesizers 55-2 and 56-2 on channel C)-12. Communication to wireless base station 30-2
Requires the generation of a local oscillator frequency to start between.

The wireless base station 30-2 also requests the call path control unit 21 in the gateway exchange 20 to operate the switch group 23 and send the currently communicating call signal to the wireless base station 302 in parallel. do.

Upon receiving this request, the gateway switch 20 sends the wireless base 830
In accordance with the request of -2, audio signals, that is, audio signals from general telephones, are transmitted not only to the wireless base station 30-1 but also to the wireless base station 30-1.
Start sending the same signal to -2.

The radio base station 30-2 that received this voice signal adds (D, etc.) of the radio base station 30-2 to the mobile radio device 50 and sends it out on the radio channel CH2. Since reception is possible, the communication quality monitoring section 57 inspects the output of the radio reception circuit 68 that received this signal, and if the quality is good, the voice signal is sent to the telephone section 59, and the control signal is sent to the telephone section 59. The information is transmitted to the control unit 58.

By performing the above operations, mobile radio device 50 enters a diversity transmission/reception state with radio base stations 30-1 and 30-2.

The diversity transmission/reception execution request signal transmitted from the mobile radio device 50 described above to the radio base station 130 in its vicinity is transmitted to radio stations 30-3.
30-4. . , 30-n also receive the same response, and among these radio base stations that meet the conditions should be transmitting a response signal similar to that of 30-1 to the mobile thermal a machine 50.

Therefore, in the control unit 58 of the mobile radio device 50 or the barrier switch 20, when it is desired to perform diversity transmission/reception with an even larger number of radio base stations, the control unit 58 of the mobile radio device 50 or the gateway exchange When the same operations as those for city transmission/reception are performed and all operations work normally, diversity transmission/reception is started with, for example, the wireless base station 30-3.

Hereinafter, by the same operation as above, the radio base station 30- which is closest to the mobile radio device 50, is not currently in communication, and whose communication quality satisfies a certain standard required for the system or higher.
3.30-4. . . , 30-n, diversity transmission and reception is similarly started. The multiplicity of diversity is the number of radio base stations 30 that can communicate or the multiplicity of simultaneous transmission and reception provided in the mobile radio 50, that is, in the case of FIG. 1B, the synthesizer 55
It depends on the number of n from -1 to 55-n or 56-1 to 56-n.

Furthermore, in the above explanation, it is assumed that the call traffic in the system is not busy, but the traffic condition is measured at each radio base station 30 or mobile radio device 50, and if the traffic becomes congested one after another, Restrictions are sequentially applied to the multiplicity of diversity, and at the busiest time, the state shifts to multiplicity 1, that is, no diversity. However, by differentiating the reduction of multiplicity depending on the type of communication being carried out (voice, data, facsimile, etc.), it becomes possible to perform systematic processing such as making broadband communication less susceptible to multiplicity restrictions. The present invention has features such as being able to ensure good communication regardless of the type of communication.

Although the above is a case of the mobile radio device 50 in the low-speed movement mode, the same diversity as described above can be applied also in the high-speed movement mode.

That is, the mobile radio 50 communicates with one wide area radio base station 17, and can communicate with other nearby wide area radio base stations 17 if the call traffic is normal.

(5) Explanation and theoretical basis for channel switching during a call and the diversity effect n-1 radio base stations 30 and one mobile radio device 50 are communicating using rl-1 channels. In the middle of
If the quality of communication in one of the channels falls below a certain value, the communication quality in one channel ( Prior to switching to a new channel (new channel) and communicating, the switching receiving means and switching transmitting means are switched at a speed that does not affect the communication signal.
If you temporarily transmit and receive the old channel and the new channel in parallel except for the two channels, and check the quality of the new channel during that time and confirm that it is above a certain level, the operation for switching the channel will be performed. The communication was completed using n-1 wireless channels including the new channel. Therefore, instantaneous communication interruptions due to channel switching are no longer caused. In addition, it has become possible to reduce the transmitting and receiving diversity effect by 1q even when channel switching is not performed.

FIGS. 18 to 1N show system configurations for explaining an example of this operation. This will be explained below with reference to these figures.

The mobile radio device 50 (B, C, D) (hereinafter simply abbreviated as 50) has a synthesizer 55-1.55-2°..., 5
5-(n-1>, wireless receiving circuit 68, and wireless transmitting circuit 66
Wireless base stations 30-1, 30-2.・, 30-
(n-1> and communication channels CH1, Ct-12, -,
Assume that the mobile radio device 50 is communicating using CH(n-1>). It is assumed that the mobile radio device 50 moves away from the radio base station 30-1 and approaches the radio base [30-n. Then, the mobile radio device 50 and the radio base As the relative distance to the station 30-1 increases, the communication quality begins to deteriorate, and the communication quality monitoring unit 56 of the mobile radio device 50 detects this (it detects that the level has decreased to 1 or less). ).It should be noted that even at level L1, the line is set to exceed the required value.

The mobile radio 50 requests all radio base stations 30 in the vicinity to measure the quality of the signal transmitted by the mobile radio 50. In response to this request, each radio base station 30 that is not currently communicating with the mobile radio device 50 reports the measured value to the mobile radio device 50.

In this case, the signals sent from the transmitting antenna of the own mobile radio device 50 are transmitted from the radio base stations 30-1, 30-2, . −
．． 30- (n-1>) While continuously transmitting a call signal addressed to base station 30-1.
0-2. ..., 30(n-1>) (for example, if the reception condition is good for 30-n>,
A request is made to respond using the downlink (from the radio base station 30 to the mobile radio device 50) control channel (CH50).

The contents of the control signal sent from the mobile radio device 50 include the signals shown below.

) ID of the mobile radio device 50.

) The partner wireless base station 30-1.30-2.
−． 30- (n-1) ID and reception quality.

11) Channel number currently in use.

V) Type of communication (telephone, fax, data, etc.).

V> Service type.

A control signal including such content is received by a plurality of nearby wireless base stations 30.

That is, when these radio base stations 30 are on standby, unless they are communicating with another mobile radio, they are on standby for reception on a control channel (for example, CI (50)) determined by each system. It is received by each radio base station 30. At the same time, the communication quality is inspected by the communication quality monitoring unit 36 installed in each radio base station 30 that receives this, and if the quality is above a certain level, the other party's mobile radio 50 is stored in the ID identification storage unit 34 in the wireless base station 30 and notified to the control unit 38.The contents of this notification include the following.

a) ID of the mobile radio device 50 that sent the message.

b) The partner radio base station 30-1, 30-2. with which the mobile radio ta50 is currently communicating.・, 30- (n-1)
ID of.

C) Channel number in use.

d) Type of communication.

e) Reception status (S/N or C/N (carrier-to-noise ratio) or average bit error rate in the case of digital signals).

1゛) Service type.

Upon receiving this signal, the control unit 38 inspects the contents and
A communicable empty channel stored in the own radio base station 30-n is searched. As a result, if the mobile radio device 50 determines that there is an empty channel that satisfies the desired Levis type and that the required communication quality can be secured for a certain period of time even after channel switching, the mobile radio device 50 3
C) -n decides to notify the mobile radio device 50 of the reception status. To do this, first, the communication path control unit 21 of the gateway exchange 20 is sent its own ID, the ID of the mobile radio 50 that sent it, and the other party's radio base station 30-1, 30-2 with which it is communicating. ..., ID of 3O-(n-1)
etc., the switch 5WI-1 of the switch group 23,
1-2 and 1-n at the same time, and also for wireless base station 3 Q-n, wireless base station 30-1, 30-
2. ..., 3O-(n-1> (hereinafter abbreviated as 30-1, etc.) requests the transmission of the same call signal. However, as will be explained later, this operation depends on the signal used in the wireless transmission path. It can be omitted if the modulation format is a width modulation wave or shallow frequency modulation.

Next, the wireless base station 30-1 for the wireless base station 30-n
Regarding the timing of transmitting a call signal in response to a request for transmitting the same call signal as in The same method as the one with different transmission timings is adopted. The reason for taking this timing is to prevent interference caused by simultaneous transmission of control signals with other radio base stations 30, and to ensure that the mobile radio device 50 receiving the control signal is connected to a radio base station 30 with good reception status. -n
This is to make it easier to select a radio base station 30 that satisfies the communication desired conditions of the mobile radio device 50.

Now, the signal transmitted from the radio base station 30-n to the mobile radio device 50 includes the following contents.

1] Call signal...1q downlink from the barrier switch 20 (from the telephone in the telephone network 10 to the mobile radio 50)
call signal.

This is a change from the current wireless base station 30-1 etc. to the mobile wireless device 5.
This is exactly the same as the call signal being sent to 0. Furthermore, the modulation level of the signal wave performed by the modulator included in the transmitter 31 of the wireless base station 30-n is also set to be the same as in the case of the wireless base station Q30-1 and the like.

2] Control signal: This includes the following signals.

2-1) ID of mobile radio device 50 received by own radio base station 30-n.

2-2) ID of own wireless base station 30-n.

2-3) A communication channel number that can be used by the own radio base station 30-n (without interference) and matches the service distinction and type of communication.

2-4) Reception status (reception C/N value, etc.).

The control signal containing such information transmitted by the wireless base station 30-n is received by the mobile wireless device 50.

The control unit 5 of the mobile radio 1150 has thus obtained information such as the CZN value sent from each radio base station 30-n, etc.
In 8, when these multiple pieces of information are compared, it is confirmed that the measurement result of the wireless base station 30-n has the best value and satisfies the quality standard level 12 or higher, provided that L2>Ll is satisfied. Mobile radio 1150 is connected to radio base station 3
It is determined that the communication zone 0-n has approached the vicinity of the communication zone (zone n), and a decision is made to switch channels.

Then, as a result of checking the ID and roam area information collation storage unit 54 to find out which communication channels are available in zone n, it is found that channel CHn is available for use, as informed by the wireless base station 30-n. know. Therefore, using the uplink control channel, the wireless base station 30-
n to perform transmission and reception on channel CI-1n, and also sends an instruction to switch 5W1- of switch group 23 to gateway exchange 20 via wireless base station 3 Q-n.
1 and 5W1-2.8W1- (5WI in addition to n-1>
-n is turned on at the same time, and also for the wireless base station 30-1, 30-2°..., 3
0-(n-1>) to request to start transmitting the same call signal.

In response to these requests, the barrier exchange tff120 also turns on 5W1-n of the suite group 23, and the wireless base station 30-n starts transmitting audio signals using communication channel n. In this case, it goes without saying that the modulation depth of the modulator of the radio base station is also different from that of the other radio base stations 30-2, 30-3.
-30-n.

In order to realize the transmission of this control signal, specifically, when the control signal is an analog signal, as shown in Fig. 2 (
As shown in a), the communication channel band C is 3 to 3.0.
Low frequency fo outside KH2.

(e.g. about 100H2) or higher frequency f, 1°I
D2. ID3...” ID8 (for example, 3.8KHz
8 waves from 00IKH2 intervals to 4.5K)-12,
However, when n=8) is used.

When there are many items to be controlled, that is, control data, the wave number of the control frequency fDO"" ID8 may be increased roughly, or it is also possible to use a subcarrier format. By applying frequency modulation or amplitude modulation to one or more of the waves, more control data can be transmitted.

Furthermore, when a digital data signal is used as the control signal, it is also possible to digitally encode the audio signal and time-division multiplex the two to be transmitted. Do as shown below.

FIG. 3 shows a timing chart for channel switching in #J-sun in the present system shown in FIGS. 1A, 1B, and 1C.

In FIG. 3 explaining the channel switching operation, it is shown that the quality of channel C)-11 used between the radio base station 30-1 and the mobile radio device 50 has decreased to a level of 1 or less. Communication quality monitoring section 37 of radio base station 30-1 or mobile radio device 50. Alternatively, the radio base station 57 detects the
- Begin preparations to enable parallel reception of transmitted radio waves from n.

Of course, the control unit 58 of the mobile radio 150 has previously controlled the synthesizer 55-L55-2+...55-(n-1
>, using channel C) ] 1 radio base station 3
Transmission wave of radio base station 30-2 by channel C)-12, channel C)-1n
-1 is receiving the transmission wave of the radio base station 30-(n-1), the synthesizer 55-n is also activated, and the channel C) transmitted from the radio base station 30-n is activated.
The synthesizer 55-n is made to generate a frequency that can also receive the transmitted wave of -1n.

Thus, due to the quality deterioration of channel Cl-11 being transmitted from the radio base station 30-1, the radio base station 30-1
When communication with wireless base station 3 is about to be stopped,
Communication between Q-n and channel C1-1n is started. In other words, the mobile radio device 50 continues to repeatedly switch the changeover switch 64-1 receiving the changeover drive input signal from the reception changeover controller 65C.

At the same time, the synthesizer 56-1゜56-
2. ..., 56- (n-1> is activated, and the wireless base station 3 is operated using channels C)-11 to C)-ke)-1.
From the state where it was transmitting to 0~1~3O-(n-1), the synthesizer 55r) also stopped working and the wireless base station 30
-n to a state where it can transmit on channel CHn. The outputs of the synthesizers 56-1, 56-2, .

During this switching transmission/reception period in which channels Cl-11 and CH2, .
This continues until the mobile radio device 50 confirms that the above is true, after which channel CH1 is released and the radio base station 30
-2.30-3. ..., 30-n and the mobile radio 50 are conducted on channels CH2, CH3, ..., CH
It continues without interruption only by n.

The switching frequency f1 of the changeover switches 64=15 and 64-2 during this switching transmission/reception period is set to, for example, 2n times or more of the R high frequency included in No. 1g. This will be explained in detail below.

The optimum value of the switching frequency is determined by considering the following conditions.

1) Modulation format of the signal to be transmitted 2) Signal frequency band to be transmitted 3) Control frequency band to be transmitted 4) Band characteristics of the transmitter/receiver section, especially the band characteristics of the high frequency filter installed at the antenna input end 5) Waveform characteristics of the switching controller 6) Response characteristics of the frequency synthesizer 7) Carrier frequency and number of channels used in the system 8) Radio wave propagation characteristics of the transmission path 9) Transfer from the barrier switch 20 via the wireless base station 30-1 Signal transmission path to wireless T150 and gateway switch 20
The transmission delay time difference due to the difference in the transmission path of the signal from to the mobile radio 150 via the radio base station 30-2, for example, 1
) is frequency modulation, 2) is an audio signal, C, 3 to 3.0
When using the out-of-band control signal shown in Fig. 2(a) as KHz, 3), C, 3KH2 or less (fDo
), or 3.8-4.5KHz (f, 1.f, 2.
fo8). As a characteristic of 4), the passband width is 16
As a characteristic of Kl-11 (or 8KHz>, 5), 6
) The synthesizer has good response characteristics and the output waveform is good. is desired.

Items 7) to 9) are taken into consideration from system design. 15M+-12 (or
1200 channels at 15 MHz), 8) are known in many documents, and 9) is about C, 03 msec.

Considering the above comprehensively, for example, in a car telephone system, the switching frequency of the changeover switch 64-2 of the mobile radio 50 is selected to be approximately 20 x n M t-l z.

The case of reception will be explained below.

As shown in Figure 2(b), if the audio signal or control signal is digitized, it is appropriate to use a faster frequency as the switching frequency, such as rlX20KHz.
A value of about 30 KH2 may be sufficient.

Also, the channel CH1 seen from the input section of the reception mixer 63
, 2, 3, . . , n-1, the carrier frequency of n is ω1. ω2
．． ..., ω. −1, ω. , also synthesizer 55-1
．． 55-2. ..., 55-(n-1) The output frequencies of 55-n are ω[1, ω[2ω[. −°1. ω
L, wireless base stations 30-1, 30-2-, 30
- (n-1), the frequency of the carrier wave at the output of the intermediate frequency amplifier included in the receive mixer 63 from 30-n is Ω1='')1-'')11 (11)Ω, respectively.
2=“2-12 Ωn-1=”) n-1-Ln-1n-1Ω =ω −ω
[. (1o)n However, by the operation of the changeover switch 64-1, the receiving unit 53 receives the intermediate frequency Ω1−1″[1 Ω2−2−〇[2 Ωn−1””n−1−Ln− A signal wave having a carrier frequency such as 1 Ωn −n − “shin” is sequentially input. And (11) and (12)...Equation (1) is Ω1 → Ω2... 憫Ω. -1-〇, (2)
There is a relationship between Such a signal is amplified in the receiver and demodulated in the demodulation circuit, but there is a frequency difference between the intermediate frequencies ω1 ”11 ω2-12 n-I Ln-1 ωn-ψ[n. If present, the demodulated output signal will have
There are cases where distortion noise occurs and cases where it does not. In other words, in the case of frequency modulation or phase modulation, if there is no frequency difference, no distortion 9i sound will occur, but if there is a frequency difference and the frequency difference (beat frequency) contains the same component as the signal frequency, occurs, and does not occur if it is not included.

On the other hand, in the case of amplitude modulation, no distortion noise occurs even if there is a frequency difference. However, even in the case of amplitude modulation, if an intermediate frequency amplifier or the like has nonlinear characteristics, nonlinear distortion will occur due to harmonics, so it is necessary to use an amplifier with good linearity.

Reception mixer 6 of mobile radio 1150 as described above
3 inputs CHl, CH2,-, Cln-1 and Cl
- Even if the local oscillation frequency for In is added cyclically and received, there is no communication problem, and from channel CH to channel CH.
It will be theoretically explained that the transition to n can be executed without any momentary interruption (noise mixing) and that there is a reception diversity effect.

First, a case where an angle modulated wave is used will be explained.

A data or audio signal (for signals in analog or digital format) can be expressed as:

μ(t) =, box aHCO5(ωHt+θ Kasumi) Also, the control signal that exists outside the band is μ.(1) =, Kubo HCOS(ω, 1+θ1) where,
a· represents the magnitude of the amplitude, ωi represents the angular frequency of the signal, and θi represents the phase when t=Q. m.

n represents a positive integer.

Next, the case of frequency modulation will be explained, but the present invention is similarly applicable to phase modulation. When the carrier wave is frequency modulated using equation (3) or equations (3) and (4), the resulting modulated wave is: I=IoSinf(ω0μ(t)>dt=I □ S
ln (ωt+5(t-)) (5>or, I= I□ sin f (ω10μ(1)10μ.(t)
)dt=I□5in(ω=15(t) +5c(t))
(5') However, 5o(t) =, I, l1nHsin ωitmi =
ai /ωH (i=1.2.3...n) This result (5
') The expression s in the sin of the right side of the expression (t) 10S. (1)
-represents the intra-membrane form of the transmitted signal.

Now, using equation (5) or (5'), the radio base stations 30-1, 30-2. −． 30- (n-1), 30
The signal transmitted from -n is input to the reception mixer 63 via the antenna of the mobile radio 50, and the local optical oscillator output (
In the case of FIG. 1B, synthesizer 55-1.55-2.・
..., 55-(n-1>, 55-n), when mixed with
The input to the receiving unit 53 can be expressed as in the following equation using the same symbols as in equations (1) and (2). (However, the changeover switch 64-1 is in a stopped state).

1 = = I□H3in (Ωit15(t)+S(
H(t)) (+=1.2...,n) Next, assume that the changeover switch 64-1 starts a switching operation. In addition, wireless base station 3O-i (i=1.2...
, n), the audio signal sB) and the control signal S. 1(t)
As an input to the receiving section 53 of the mobile radio device 50, I= (I01/n> [1+
2F1(n/myr) )xs+n (mπ/n)
cos mp t ]xs+n (Ω1 j +
S (j) 10S. 1 (1)) + (1o2/n) [1+2Σ (n/mπ) m=1 xs+n (mπ/n) xcos mp ct-2yr/ (np)) ]xs
in (Ω2 t + s m + s c2(t) )
+(Io3/n) [1+2Σ (n/mπ)) m=1 xsin (rr+yr/n> xcos mp (t-4yr/ (np)) ]xs
in (Ω3 i 10S (j) + 5c3(1))
10... xsin (myr/n> xcosmp(t-2(n-1)π/(rl))]xs
in (Ω.t+5(t) +s,,(t)) where p is the switching angular frequency, m is a positive odd number, and the switching times for n input waves are equally spaced.

When the right side of equation (7) is transformed, it becomes the following equation.

I=(I/n) [sin (Ω1t + U
1 (j) )+(n/π) sin(π/n) x[cos((C1-p)]+U1(t))-cos
((C1+p) t+L11 (j) ) ]+(n/
3π) sin (3π/n> x[cos((Ω −3p> ]+L11 (t) )
-cos((Ω1+3p) t+L11(t) )]
+ (n15π) sin (5π/n>x[cos(
(Ω −5p> ]+L11 (t) )−cosNΩ
1+YE)) t+U1 (j) )]]+...
・ ]+ (I02/
n ) [sin (O2t+U2 (t) )+(n
/π) Sin(π/n> x[cos((O2,p) ]+LJ2(t))−c
os((O2-tD) ]+LJ2(t)
) ] + (n/3π) sin (:3yr/n
)x[cos((O2-3p)]+U2(t))-c
os((O2+3p) ]+U2 (t) ) ]+
(n15π) sin (57r/n>x[cos((
O2-5p) ]+LJ2 (t) )-cos((O
2+5p)t+U2 (t)) ]+・・・・・・
]+ (10,/n>
[sin (Ω.t+uo(1))+(n/π)si
n(π/n> x[cos((Ω −p) t+LI. (
t) )−cos((Ω +p)t+Uo(t))
]] + (n/31sin (3π/n)x[cos((
Ω-3p)t+U,(t))cos((Ω-3D)t+LJn(t
) ) ]] +(n157r)Sin (5π/n)X[C03((
Ω −5p) t −t LJ n (t)
)−cos((Ω +5p)t+U.(1))]] +・・・・・・]
However, U・(t) =s(t) +5oH(t)<r
=1.2. ..., n) Here, looking at equation (8), it is a combination of many carrier waves, so if it is demodulated after being amplified with an intermediate frequency amplifier, it will generally be caused by cross modulation (interference). Distortion noise may occur.

Furthermore, the amplitude I of the input wave is expressed by equation (8). 1゜■
..., Io, are not necessarily the same amplitude, but when the time occupation rate of O2 switching is made equal (duty 10
0/n%), the wireless base station 30-1 is
-2 is closer, so Io2. Io3
．． ..., Ioo is larger. IOl.

If the sizes of the signals, such as 102, are different, cross modulation may occur. There are two types of cross-modulation causes: one is due to the combination of many carrier waves as shown in equation (8) above, and the other is due to differences in IO1, IO2, etc.

Now, regarding cross-modulation caused by combining many carrier waves as shown in equation (8), distortion noise can be removed by the following method.

That is, there is a method of increasing the switching speed (period) of the changeover switch 64-1 to drive it outside the bandpass characteristic of the intermediate frequency amplifier. However, as already mentioned, in many cases where the switching frequency is set to 2n times or more the highest frequency of the signal, there is no need to make it any faster. By increasing the speed, m = l on the right side of equation (7),
As can be seen from equation (8), the term 3゜5... can be ignored in the intermediate frequency amplification stage, and (8)
The formula can be expressed as below.

1-(1/n) x I 5in (Ω1 to 15(t)+5
c1(t) ) +(1/n)xI025in(Ω2t+5(t)+5o
2(t) ) +... +(1/n) x I□osin (Ωn-i t
+S (t)+so, (t)) In formula (9), Ω1=Ω2=...Ω, -1=Ω. =Ω (1
0) Sc2(t)=・・・・・・−5°, −1(t)
Assume that it is possible to set =So, (t) =0. In fact, equation (10) is technically possible by the means described later, and equation (11) can be obtained from the radio base station 30-1 (
Alternatively, in the latter half of channel switching, if only the control signal is transmitted (only from the wireless base station 30-n), then equation (11) holds true. Then, equation (9) can be transformed as follows.

1-(1/n) X Iol 5in(Qt +S (
t) 10s. 1 (1) ) + (1/n)
t)>Equation (12) is transformed into the following equation.

1= (1/n)x (12+I 201
n 1/2 12 l011nxcos 5o(t) )xsin(
Qt + S (t) + β (t)) β (t) = ta
n' [sin s (t)X ((I01/ I
, )+cos s (t) )−'co(13'
) In ""02+I03""""l0n(13"> (13), (13') In the formula, Iol × In (14) 3 c
Since (() <<1(14'), equation (13) becomes approximately as follows.

1=(1/n) X In sln (Qt +s
(t)+5o(t)) Looking at equation (15), this is a switching reception diversity system with n-branch antenna inputs, and after the signals are switched and received, they are combined as they are, so-called linear combination. Low input electric field I. 1 is ignored and synthesis is performed using an input signal with a high input electric field. If the duty of the reception selector switch is made variable and the duty of a channel with a large reception input is increased, this effect will be even greater. Therefore, it has been revealed that the present invention has a reception diversity effect.

From equation (14), the output of the frequency discrimination circuit (radio receiving circuit 6
8) is expressed by the following equation.

E=d/dt (S(t)+5o(1))=μ(1) 1μC(1) where μ([) and μ. (1) is (3) respectively
and (4).

Note that equation (14) is always satisfied in normal mobile communication systems and is not a particularly limiting condition.

It applies deep modulation to the main audio signal compared to the control signal, and shallow modulation to the control signal.Moreover, the depth of modulation added to the audio has recently been changed to equivalent tone (1K) - 1
z) signal with 3.5 radians (25 KHz carrier spacing, and if the carrier spacing is 12°5 KHz, the same <
This is because it is shallow (roughly 175 radians).

From the above, it has been clarified that equations (10) and (14) are sufficient conditions for no distortion in the case of frequency modulation. The technical conditions for establishing equation (10) will be described below.

Technically, to do this, the radio base station 30-1.30
-2. −． 30-n transmitting units 31-1, 31-2.・・・
, 31-n is achieved by increasing the frequency stability of the reference crystal excavator, which determines the stability of the carrier frequency.

For example, in the example of the automatic heavy telephone system described later, the stability of the reference crystal oscillator installed in the base station is currently C.5.
Since it is about ~'Ippm (0,5~1xlO'), the frequency fluctuation of the carrier wave is 1xlO'x 900MHz =
It is 900Hz.

In this case, noise is just mixed into the audio signal band.

However, if advances in technology have made C, 01 ppm possible, then 1 x 10' x 900MHz
= 9112, and even if there is a harmonic of the noise, there is less possibility that its large energy will mix into the signal band. Alternatively, in a wireless system using a carrier wave frequency of 9MH2, with carrier wave fluctuation of lppm,
Even with the current technology, there is no l sound mixed in.

The case where the mobile radio 1ff 150 receives is explained above, but the case where the mobile radio 50 transmits will be explained next.

In FIG. 1B, the wireless signals switched by the changeover switch 64-2 are, for example, wireless channels CH1, C1-1.
2, . . . CHn are sequentially switched, but the receiving side is the radio base station 30-1 (CHl).

30-2 (CH2>, ..., or wireless base station 30
−n (CHn) and transferred heat #IJ machine 5
There is no cross-modulation problem when mixed as in the case of receiving on the 0 side. However, as is clear from equation 8), there are components of the carrier angular frequency (Ω±np) as sidebands, so these are emitted into space and interfere with the communication of other channels or other systems. It is necessary to provide a bandpass filter at the transmission output section for filtering so as not to cause

For this purpose, it is necessary to spread the equation (Ω0np) outside the frequencies of all channels transmitted by the mobile radio 50 as a switching frequency, and the car telephone system shown in FIGS. 1A and 1B used in the example Then, it is necessary to set p/(2π)>15xnMHz.

This will be explained below using formulas. However, the characters used in the formula are the same as above unless otherwise specified. for example,
The transmission signal appearing at the output of the transmission mixer 61 in FIG. 11 is expressed by the following equation.

xsin (Ω3 to 15(t)+5C(t))+...
... 1=I.

[1-t2Σ(n/rTlπ)m
=1 XSin (m7r/n)CO3mpt]xsin
(Ω1t + s (t) + s c (t) ) 10■
.

[1+2Σ (n/mπ)) m=1 xsin (mπ/n> xcos mp (t-2π/ (np))] xsin
(Ω2 t + s tt) + s c (t) )
+ro[1+2F1(n/m7r)) xsin (mπ/n) xcos mp (t-4π/ (rl)) ] 10I
□ [1+2l-1(rl/m7r))xsin
(mπ/n) xcos mp (t-2(n-1) 7T/ (np
> )xsin (Ωnt +5(1) 10S.(t)
)m=1,2,5. ...... However, p is the switching angular frequency, m is a positive odd number, and the switching times for n input waves are set at equal intervals.

When equation (17) is transformed, an equation similar to equation (8) is obtained. Then, when the obtained equation is passed through a bandpass filter having the function as described above, the following equation is obtained as an output signal.

I = Iosin (Ω, t + 5 (t) + 5o (t)) + I
□5ln(Ω2t+5(t) 10S.(t))+...
...+Iosin(Ωnt+5(t) 10s.(t)) In the above equation, the first term on the right side is for the wireless base 830-1, the second term is for the wireless base 30-2, and hereafter the first term is for the wireless base 830-1. i, and each signal exhibits the same mathematical formula as in the case of induced frequency modulation transmission.

And channel CI-(1 uplink signal is from wireless base station 30
-1. The upstream signal of channel CH2 is received by 30-2, and the upstream signal of channel CHn is received by 30-n. These received signals are demodulated and transmitted to necessary devices such as the barrier switch 20.

Alternatively, the wireless base station 30-1
In the case of having the configuration shown in the figure, the uplink signal of channel CH1 is sent to the transceiver 90-1 of the radio base station 30-1. Channel C
The uplink signal of l-12 is transmitted and received by 30-1 6190-2
．． In the following order, the t signals of channel CHn may be received and demodulated by the transmitter/receiver 9O-rl of channel CHn 30-1, mixed, and transmitted to a necessary device such as the barrier exchange 20.

As is clear from the above description, by using the multiplex transmission method and apparatus of the present invention, it is possible to obtain a signal diversity effect in the receiving section.

In the barrier exchange 120, the wireless base stations 30-1, 30-2.
. . , 30-n, the audio signals are transmitted from the radio bases 830-1, 302, . . . , 30
- mix the signals from n. When mixing, the signals from the radio base stations 30-2, 30-3°..., 30-n have better transmission quality than the signals from 30-1, so they can be mixed as is, or the S/N may be mixed with an output proportional to .

In other words, a reception diversity effect is obtained.

The transmitting/receiving diversity effect of the present invention has been described above, and a method for increasing the effect will be described in detail below.

First, regarding reception diversity, in the sequential switching method described above, each synthesizer 55- of the changeover switch 64-1
1.55-2. ..., 55-n have the same connection duration (duty time). However, this is not always necessary; rather, the diversity effect will increase if the wireless channel is connected for a relatively long time to a wireless channel where a reception input with a good S/N ratio can be obtained. For this purpose, a part of the reception section is synchronized with the changeover switch 64-1, detects the signal-to-noise ratio at that time, transmits this to the control section 5B, and thereby
By changing the frequency of the output of C, the above [''
It becomes possible to reach the target. This is also possible with the configuration shown in Figure 1B, but in order to make the explanation easier technically,
The configuration shown in the figure will be explained below.

The difference in this figure from FIG. 1B is that the radio receiving circuit 68
Apart from this, a C/N measurement receiving section 52, a receiving mixer 73,
and a changeover switch 64-3 are installed, and a changeover switch 64-3 is installed.
The control of 4-3 is performed by the control section 58B. The operation shown in FIG. 11-1 will be explained below.

In the figure, a reception mixer 73 is installed at the front stage to operate the C/N measuring reception section 52. A part of the reception signal received by mobile radio 50B is added to reception mixer 73. The output from the changeover switch 64-3 is added as the local oscillation frequency to the reception mixer 73. However, this changeover switch 64-3 does not need to be switched at a high speed like the other changeover switches 64-1 and 64-2, and a low speed of, for example, about 10 Hz is sufficient.

Then, when the changeover switch 64-3 is in a position to turn on the output of the synthesizer 551, the C/N measurement receiving section 52
The C/N value of channel CH1 measured in is transmitted to the control unit 58B. Then, when the selector switch 64-3 is in the position to turn on the output of the synthesizer 55-2, the channel C
Measure the C/N of H2. Synthesizer 55-
When in position to turn on the output of channel CI-
The C/N of 1n is measured and transmitted to the control unit 58B. The control unit 58B uses these values to control the switching frequencies of the reception switching controller 65C and the transmission switching controller 67C so that they each operate at a speed inversely proportional to the C/N, for example.

In order to enable the above operation, it is necessary to make some changes to the method of transmitting signals from each of the radio base stations 30, which will be explained below.

Now, if we reproduce the above equation (9), +5(t) +s -(t) > (9)
(i=1.2....,n) In equation (9), the control signal transmitted from each radio base station 30 includes the ID of the radio base station 30, and the duty cycle of the above-mentioned changeover switch. Since this ID is necessary to change Sc.=O <r=1.2. ... n) I can't leave it alone. Therefore, in this case (10
) holds true, but the equation corresponding to equation (12) is as follows.

+5(t) +5ci(t) ) In equation (19), each 5ci(t) is a sufficient amount compared to 1 (however, the constant term is omitted), so it can be approximated as an equation corresponding to equation (12). We get the following formula.

The signal expressed by equation (20) is demodulated, and each wireless base station 3
In order to extract the control signal transmitted from S,1
By making the frequency components of the signals included in (t) different, it is possible to filter them using a filter.

Therefore, by measuring the C/N of each radio channel, adding the ID of the radio base station 30 that sent the signal, and sending it to the control unit 58B, the control unit 58B measures the C/N for each radio channel, that is, for each radio base station. The duty time for receiving (or transmitting) every 30 minutes is C/Nl.
It becomes possible to determine the relationship between

In order to achieve the above effects with the configuration shown in FIG. 1B, each radio base [30-1, 30-2, . . .
Control signal 5c1(t) transmitted from 30-n
, 5o2(t)...+, 5on(t), and a means for monitoring communication quality such as measuring the signal-to-noise ratio may be provided for each of them. . Then, this measured value is reported to the control unit 58, and the changeover switch 64-1 is operated with a switching duty according to the signal-to-noise ratio.

By operating the receiving section 53 of the mobile radio device 50 as detailed above, it is possible to increase the transmitting and receiving diversity effect.

Next, a method for increasing the reception diversity effect will be briefly described. FIG. 11 shows the mobile radio device 5 in this case.
An example of the configuration of 0G is shown.

In FIG. 11, the input radio wave (input signal) to the mobile radio device 50C is divided into n-+-1 equal parts at the antenna input section, and each radio wave receives a radio wave 68-1.68-2°...68-
n and reaches the interference detector 62.

Each of the radio receiving circuits 68-1 to 68-n receives a receiving microphone υ63-1, 63-2. ..., 63-n, receiving section 53-1.53-2. ..., 53-n are provided, and the local oscillation frequencies from the synthesizers 55-1, 55-2, ..., 55-n are input to the reception mixers 53-1 to 53-n, respectively. Ru. Therefore, in the configuration of FIG. 11, there is no reception changeover switch 64-1, and it is possible to always receive and demodulate the signals of each radio channel CH1, CH2, . . . , CHn.

Moreover, the output signals of these receiving sections 53-1 to 53-n are as follows.
A part is sent to the control unit 58C, and a part is sent to the communication quality monitoring unit 58C.
7-1.57-2. . . , 57-n, the communication quality of each wireless channel is monitored, and the results are sent to the control unit 5.
8C, and the outputs of the receiving sections 53-1 to 53-n are added to a signal mixing circuit 62 and subjected to processing similar to that of a normal diversity receiver (in this case, synthesis after detection). It is sent to the telephone section 59.

By adopting the circuit configuration as shown in FIG. 11, it is possible to obtain a large diversity effect.

As is clear from the above description, the operation of the present invention is to predict the frequency shift after switching to a new communication channel by measuring the transmission frequency of the mobile radio device 50 at the radio base station 30, and to predict the frequency shift after switching to a new communication channel. The feature is that by setting and using the transmission channel of the radio base station that communicates after channel switching at an appropriate frequency, it eliminates call interruptions due to channel switching and noise due to cross modulation that occurs.

Next, the method of using the control signal, which plays an important role in channel switching during a call according to the present invention, will be explained.

In the following description, it is assumed that the configuration shown in FIG. 1B is used.

Wireless base Q30-1.30-2. , 30-n to the mobile radio device 50 using channels C)-11, CH2, -, CHn will be described.

When the above-mentioned channel switching preparation operation is completed, the mobile radio v
The radio receiving circuit 68 of 150 includes radio base stations 30-1.
30-2. ., channel C)-11 from 30-n,
The communication signals are transmitted as CH2, .

Furthermore, since the changeover switch 64-2 also starts operating, the transmission wave from the mobile radio device 50 also starts to be switched and transmitted.

Here, from the barrier switch 20 to each wireless base station 30-1 to 30-3,
The difference (1
Since the delay time difference caused by (within 0-0) is at most C03 msec or less, there is no problem with the operation and it can be ignored. Also, wireless base stations 30-2, 30-3.・
, 30-(nl) includes only voice signals, but downlink signals from wireless base stations 30-1 and 30-n include control signals (wireless base station 30-n) in addition to voice signals.
Since the identification signal for identifying 0-1 and 30-n and the switching command signal are inserted in the form of out-of-band signals as shown in FIG. At 68, this is received and transferred to the control section 58.

The control unit 58 identifies this signal and, under the control of the control unit 58, initially transmits a channel switching response signal from the wireless base station 30-1 and a subsequent call signal using channel CHn from the wireless base station 30-n. To confirm that the ID signal is sent and that the signal quality is good, the wireless transmission circuit 68 is used to transmit the confirmation information to the wireless base station 30-n through the communication channel CHn using a signal outside the uplink communication signal band. , and contact the gateway exchange 20 via the wireless base station 30-n.

Since the barrier switch 20 received notification that the downlink communication between the wireless base station 30-n and the mobile wireless device 50 is working well, the communication path control unit 21 switches the switch 5WI- of the switch group 23. 1, 1-2, ... 1-n, 5WI-
Only 1 is turned off. - On the other hand, the mobile radio device 50 instructs the radio base station 30-1 to stop transmission.
0, the operation of the synthesizer 55-1 is stopped, and the changeover switch 64-1 (FIG. 1B) is switched to the synthesizer 55-2.
゜55-3. ... 55-n is caused to perform a circular switching operation.

These conditions are illustrated in FIG.

Next, channels CH1 and Cl-12 are transmitted from the mobile radio 50.
,..., wireless base station 30-1゜30- using CHn
2. . . , 30-n will be explained.

In the mobile radio device 50, a reception switching controller 65C and a transmission switching controller 67 are operated according to instructions from a controller 58 in the device.
G are activated, and the changeover switches 64-1 and 64-1 are activated.
4-2 are synthesizers 55-1.5 in operation, respectively.
5-2. ..., the output of 55-n and 56-1.56
-2. ..., switch the output of 56-n to channel C.
1-11, Cl-12°CHn are being switched in sequence for transmission and reception (FIG. 1B).

The signals sent to this active communication channel include, in addition to the communication signal, an out-of-band control signal (Fig. 2 (a)).
Status of channel used by mobile radio 50 (channel CH1
,C)12. -, CHn to channels CH2, CH3,
..., C)-In), the identification ID of the mobile radio device 50, etc.

(For example, in a tone signal such as fDl in Fig. 2(a), f
DI and 103 may be combined).

The uplink signal of channel Ct-+i received by the radio base station 30-i (i=1.2... [1) is demodulated by the receiving section 53 of the radio base station 30-1, and the demodulated audio After it is confirmed that there is no abnormality in the signal or out-of-area signal, the signal is transferred to the barrier switch 20. In the barrier exchange tM20, the wireless base stations 30-1, 30-2. . . . Among the n signals from 30-n, the voice signal is sent to the wireless base station 30-1.
．． The signals from 30-2..., 30-n are mixed. In the barrier switch 20, the wireless bases [30-1, 30-2, .
, 30-n, the radio base station 30-n
1.30-2. . . , 30-n, respectively, by the identification signals sent outside the voice band added by the wireless base stations 30-1, 30-2, . −． It is confirmed that the signals are from channels CH1, CH2, . . . , CHn from 30-n.

In the barrier exchange 6120, it is confirmed that the channel switching operation during the call is progressing smoothly, and the control unit 38 of the mobile radio 50 is sent to the radio base station via channel CHn via the radio base station 30-n. Channel C with 30-1
Communication by F-11 is stopped and radio base station 30-2.3
0-3. ... reports that it is possible to concentrate on communication with 30-n.

In the mobile radio device 50 that has received this control signal, the control unit 5
8, the synthesizers 55-1 and 56-
1, and change the position of the selector switch 64-1 for receiving channel selection to
3. ... 55-n is made to operate in a circular manner,
The transmission channel selection switch 64-2 includes synthesizers 56-2, 56-3. ..., 56-n to continue the cyclic switching operation.

As a result, the mobile radio device 50 changes the channel CH
The communication with the radio base station 30-1 using the radio base station 30-2, 30-3. . . 30-n using channels CH2, C)-13° . . . , Cl-In, respectively. With this, channel switching is completed, and a state in which communication is being performed using the new wireless channel group is realized. The uplink channel and downlink channel switching operations described above are performed in parallel and end at approximately the same time.

As is clear from the above description, there is no momentary interruption during channel switching, and noise can be kept to a low level that poses no problem in practical use.

If a malfunction or non-operation occurs during any of the above operations, the operation must be restarted from the previous operation. In addition, when the operational failure is large, the control unit 58
There is also an operation for returning to the communication channel before the switching operation, which is stored in the memory section built into the device.

78 through 7E are flow charts showing the flow of operation of the system shown in FIGS. 1A, 1B, and 1C.

Gateway switch 2C, wireless base station 30-1, 30-2,...
, 30-n and the mobile radio 50 start operating, and the switch 5W of the switch group 23 included in the barrier exchange 20
1-1.1-2. -, 1- (n-1) is on,
Wireless base stations 30-1, 30-2. ..., 30- (n
-1> and the mobile radio device 50 are communicating. For this communication, channels C)~! instructed by the control unit 58 included in the mobile radio 50 are used. 1. CH2,...,CH
−(n−1>downlink frequency “1.F2 ,...,F
n-1 and upstream frequencies f1, f2, "" n-1 are used (S101, FIG. 7A).

Wireless base station 30-1, 30-2. ....

3O-(n-1> constantly issues a reception status report from the mobile radio device 50, and when a deterioration in communication quality is discovered, it is immediately reported to the mobile radio device 50 (3102>).

The communication quality monitoring unit 57 of the mobile radio device 50 receives this (S103) and monitors whether the call quality has deteriorated below level L1 (S104). If the call quality has deteriorated below level L1 (3104YES)
, from the control unit 58 to the wireless base stations 30-2, 30-3, . ,'30-n, etc., whereas the wireless base station 30-1.30-2.30-3.
, 30- (n-1) and the mobile radio device 50 using the uplink frequency f1. f2,... fn-
1 signal to be monitored and received (3105,
Figure 7B).

Each of the surrounding wireless base stations 30 (for example, 3O-n) that has received the monitor reception instruction monitors and receives the signal of frequency f1 (5106), and reports the result to the communication quality monitoring unit 57 of the mobile radio device 50 (3107). .3108), the monitor reception quality from each wireless base station 30 is measured and compared, and the call quality of the wireless base stations 3o-n is set to a certain standard level L2, for example.
(S109YES).

If the communication quality is not good (NO in S109), the process returns to step 5105 and other wireless base stations 3° are made to perform monitor reception.

Therefore, the control unit 58 controls whether the mobile radio device 5o is connected to the radio base station 30 or
-1, to the zone covered by wireless base station 30-n (3110, 7th
In order to switch to communication with the wireless base station 30-n, the wireless base station 30-n searches for an empty channel that can be used (5111), and as a result, the channel CHn
(S112>. The control unit 58 determines the mobile radio device 5
0 to prepare for communication on channel CHn (3113
).

A communication preparation command for using this channel CHn is sent to the wireless base station 30-n, and preparations are made for communication using the channel Ctl n (3114). The mobile radio Fli50 prepares to enable communication using channel CHn,
That is, the frequency F is transmitted from the control unit 58 to the synthesizers 55-n and 56-n. and receive the frequency f. The controller 65C, 67C for switching between reception and transmission starts a switching operation (5115,
Figure 7D).

When ready to communicate using channel CHn, radio base station 30-n sends a preparation completion report to channel CI-n.
511 to contact the mobile radio 50 using I n.
6) At the same time, the wireless base station 30-n performs the barrier exchange t
A report is sent to ff120 that communication preparations have been completed between radio base station 3Q-n and mobile radio 50 on channel C)-In (8116).

The gateway exchange 20 indicates the completion of communication preparation between the radio base station 30-n and the mobile radio device 50 using the channel CHn.
When confirmed (3117), switch fu23 (D switch y
Switch SW"I-1, 1-2, -, 1-(n-1> remains on, and switch 5W1-n is also turned on (S11
8). Therefore, the communication path control unit 2 included in the barrier switch 20
1 reports to the mobile radio device 50 that it is possible to start communication with the mobile radio device 50 using channel ct-+n (3119).

Upon receiving the communication start possibility report, the radio base station 3Q-n sends a communication start signal to the mobile radio device 50 using channel CI-(n (S123>). 3124.), and at the same time, the communication quality monitoring unit 57 of the mobile radio 50 confirms the start of communication on the channel C)-1n using the ID signal, which is an identification signal for identifying the mobile radio 1!150. Base station 3O
- If the quality level of communication with rl is measured and it is detected that the quality level is 2 or more above a certain quality level (S125
S, FIG. 7E), wireless base station 30-1 and mobile wireless device 50
The wireless base station 30-1 is commanded to stop communication using the channel CHI with the wireless base station 30-1 (S126). As a result, the radio base station 30-1 turns off communication using channel CH1 (S127>).

This channel C) 11 has stopped communicating with no 5ui5.
0 is confirmed (S129), the operation of the synthesizers 55-1 and 56-1 is stopped, the changeover switch 64-1 stops switching to the output terminal of the synthesizer 55-1,
The selector switch 64-2 stops switching to the output terminal of the synthesizer 56-1 (although this operation is not necessarily required), and switches channels Cl-12, Ct-13, . . .
C) -In is operated.

The communication control unit 21 of the gateway exchange 20, which has confirmed that channel CH1 communication has stopped, switches the switch 5W1-2 of the switch group 23.
．． 1-3.・, 1-n remain on, switch 5
Turn off WI-1 (3128).

This ends the period of channel switching operation, and switches SW1. -2.1-3. -1-n is on, channels CH2, 0)-13, . . . , CHn downlink frequency F2. F3. ...F, upstream frequency f2= f3=・
..., fo, the mobile radio device 50 connects to the radio base station 30.
-2.30-3. −． 30-n, it is possible to continue high-quality communication without instantaneous disconnection or noise mixing, and with the transmission/reception diversity effect (8130-n).
).

The busy channel switching operation for mobile radio 1150 in fast moving mode is similar to the busy channel switching in slow moving mode described above. It is assumed that when a call is started prior to channel switching during a call performed by a mobile radio device 50 mounted on a car, the moving speed of the car is low and the call is successfully made in a low-speed movement mode. However, if the moving speed of the car subsequently increases during the call, the following technical difficulties occur. In other words, one of the plurality of channels used for communication has deteriorated in communication quality, so the use of this channel is discontinued and communication with the new radio base station 30 is started using a new communication channel. , the call quality of the old channel deteriorates below the quality determined by the system.

Alternatively, setting up a new channel with a new wireless base station 30 fails due to the high-speed movement mode. The specific cause of failure is that the transmission quality of digital control signals deteriorates due to deterioration of radio wave propagation characteristics due to high-speed movement, and the use of new channels to surrounding wireless base stations 30 or to wireless base stations 30 becomes difficult. The instruction or its response signal cannot be received well.

Wide area wireless base station 17 to solve such problems
Figures 7F to 7M show the operation flow of the system with the addition of
It is shown and explained in the figure.

Barrier exchange I! ! 2C, wireless base station 30-1.30-2,
・, 30-n, etc. (30-p, 30-Q, -.

etc. are simply referred to as 30-n etc.), wide area wireless base station 17-1
．． 17-2. ..., 17-i, etc. (hereinafter simply referred to as the wide area wireless base station 17) and the mobile wireless device 50 start operation, and the switches 5W1-'1.1-2. . . 1-(n-1) is on, and the wireless base 830-1.30-2.・, 30-
(n-1> and the mobile radio 50 are communicating in low-speed movement mode.

For this communication, channels CH1, CH2°-, CH- instructed by the control unit 58 included in the mobile radio device 50 are used.
(Download frequency F1.F2 of n-1>.

"", Fn-1 and upstream frequency f1. f2. ...fo
-1 is used (S701, Figure 7F).

Wireless base station 30-1, 30-2. ....

30-(n-1) constantly issues a reception status report from the mobile radio device 50, and when deterioration in communication quality is discovered, it is immediately reported to the mobile radio device 50 (S702).
. In the mobile radio Ia 50 that receives this, the communication quality monitoring unit 57 determines the mobile radio Ia 50! The device 50 itself has also discovered that the call quality has deteriorated (3703, 5704), and is monitoring whether the call quality has deteriorated below level L1 (3703, 5704).
3705). If the call quality has deteriorated below level L1 (S705YES), the control unit 58 sends the wireless base stations 30-1, 30 to the wireless base stations 30-n, etc. in the vicinity of the wireless base station 30-1. -2,30-3,・,3
0- (n-1) and the uplink frequency f1. used for communication between the mobile W line 150. Among the signals of f2° . . .

Each surrounding wireless base station 30-n receives an instruction for monitor reception.
etc., the signal of frequency f1 should be monitored and received 5707
), report the results to the communication quality monitoring unit 57 of the mobile radio [50 3708.5709), and each radio base station 30-n.
For example, it is detected that the call quality of the wireless base station 30n is better than a certain standard level L2 (S710YES).

If the communication quality is not good (371ONO), return to step 8706 (Fig. 7G) and repeat the [Send monitor reception instruction (8711N) until the specified number of times is reached]
O1 Figure 7H).

When the number of monitor reception instructions sent reaches the specified number of times (
S711YES>, the control unit 5B determines that the mobile radio device 50 itself is in the high-speed movement mode, and decides to communicate with the wide area wireless base station 17 in the high-speed movement mode.571
2), start sending and receiving on the wide area communication channel (37
13).

Therefore, the mobile radio device 50 communicates with the wide area radio base station 17,
In order to notify that communication is desired, a communication request signal is sent on a control channel (CH) for wide area communication (37
14).

The wide area radio base station 17 that received this communication request signal checks the ID of the mobile radio 1150 (8715) and searches for an empty channel (S716).

The mobile radio device 50 is connected to a radio base station 30 with degraded communication quality.
3717, Fig. 71), and the radio base 830 receives this instruction to stop communication using channel CH1.
-1 stops communication by channel CH1 (371B
). Since the mobile radio device 50 is in high-speed movement mode, it can be predicted that the quality of communication with the radio base stations 30-2 to 30- (n-1> will deteriorate soon). (For n-1>, please inform us that you would like to stop communication as soon as the call quality deteriorates, that you currently wish to communicate with the wide area wireless base station 17, and that you would like the wide area wireless base station 17 to measure your speed. Sends a signal requesting (S719) When this signal is received (37
20), wireless base stations 30-2 to 30-(n-1
), it is confirmed that the mobile radio 1150 has shifted to the high-speed mode, and the request for communication with the wide IIIi radio base station 17 and the speed measurement request are transferred to the gateway exchange [20] (S721).

Upon receiving this notification, the barrier switch 20 prepares to use the communication path switch 5W1-1B for the wide area wireless base station (S722).

Eventually, the communication quality at the wireless stations Q30-2 to Q30-(n-1) deteriorates, so they stop communicating with the mobile wireless device 50 (S723).

When the wide area wireless base station 17 finishes searching for an empty channel,
5724 Please send empty channel information via control channel.
), From this empty channel information, the mobile radio 50 learns that the communication channel CH101 for wide area communication is empty and confirms that it can be used (3725).
The mobile radio device 50 uses communication channels CH101 to CH100+.
(nl) is transmitted to the wide area wireless base station 17 via the control channel (8726).

Upon receiving the notification specifying the communication channel as CHlol~100+(n-1>), the wide area wireless base station 17 confirms that the channel CH101 etc. is available, switches to the channel CH101 etc. (3727), and Send a switching completion report via the control channel 3728;
7J), the mobile radio 50 receives this and confirms that it is possible to start a call on the communication channel C)-1101 for wide area communication (3729).

Since the wide area wireless base station 17 has completed channel switching, it requests the barrier switch 20 to turn on the communication path switch 5W-1B etc. for the wide area wireless base station 17 (5730).
, the barrier switch 20 receives this and switches the call path switch 5.
W-1-1B etc. are turned on (S731). Further, communication with the mobile radio device 50 of the radio base stations 30-1, 30-2 to 3O-(n-1) is also terminated due to deterioration in communication quality.
These wireless bases #30-1, 30-2 or 30-
(n-1> to communication path switch 5W1-1 or 5W1
- Since requests have been received to turn off (n-1) as well (S732), the communication path switch 5W1-1, 5W1-2 or 5WI-(n-1>
are sequentially turned off (S733), and the channels CH101 and CH10 are switched off between the wide area radio base station 17 and the mobile radio 50, respectively.
2~100+(n-1>, downlink frequency G1~Gn-1
, high-quality communication (talk) is performed using uplink frequencies 01 to gn-i (3734).

When the call ends, the transmitter/receiver is put down, and the on-hook signal and end-of-call signal are sent to the wide area wireless base station 17 via channel CH101 etc. (3736), and then transferred (3736).
3737), in the barrier switch 20, the communication path control section 21 is operated, and the switch 5WI-1B of the switch group 23,
1-28~1-(n-1) Turn off B and end the call (3
738).

In step 8710 (Figure 7G), the mobile radio va
50 monitor, if the signal is received well (S710
YES), the control unit 58 causes the mobile radio device 50 to move from the zone covered by the radio base station 30-1 to the radio base station 30-1.
573 It seems that it has moved to the zone covered by n.
9, Figure 7), the wireless base station 30 remains in low-speed movement mode.
5740 to search for an empty channel that can be used by the radio base station 30-n in order to switch to communication with the wireless base station 30-n.
), and as a result determine, for example, the channel CHn (3
741). The control section 58 controls the transmission section 51 of the mobile radio device 50.
-n and the receiving section 53-n, the wireless base station 30-n
n to prepare for communication on channel CHn (S742).

A communication preparation command for using this channel CHn is sent to the radio base station 30-n, and preparations are made for communication using the channel CFIn (S743). The mobile radio 150 prepares to enable communication using the channel CHrl, that is, the controller 58 makes preparations to enable communication using the channel CHrl.
6 to n are instructed to receive the frequency Fn and transmit at the frequency f, and the switching controller 65 enters the switching operation (3744, FIG. 7L).

When ready to communicate using channel CHn, the wireless base station 30-n notifies the mobile wireless device 50 of completion of preparation using channel CHn (5745), and at the same time, the wireless base station 30-n n issues a report to the opening exchange 20 that communication preparations have been completed between the radio base station 30-n and the mobile radio 50 via channel CHn (
S745). I didn't move after receiving this! 18150 confirms that communication preparations for channels 01 to 1 ") have been completed 3749) and issues a communication start command to the radio base station 30-n 5750), which is received by the radio base a.
At 3o-n, it waits for communication (3751).

When the gateway exchange 20 confirms the completion of communication preparation between the radio base station 30-n and the mobile radio device 50 using the channel Cl-In (S746), the switches 5WI-1, 1- of the switch group 23 2, . In contrast to the radio device 50, the mobile radio device 5
0 (3748).

Upon receiving the communication start possibility report, the radio base 83Q-n sends a communication start signal to the mobile radio device 50 using channel CHn.
It is sent to the addressee (S752). The mobile radio device 50 confirms the start of communication via channel C)-In using the ID signal, which is an identification signal for identifying the radio base station 30-n (5753), and at the same time, the communication quality monitoring unit 5 of the mobile radio device 50
7 measures the quality level of communication between the mobile radio 6150 and the radio base station 30-n, and when it detects that the quality level is 2 or more (S754YES, Fig. 7M)
, the radio base station 3 stops communication between the radio base station 30-1 and the mobile radio 50 using the channel CHI.
0-1 (3755), thereby causing the wireless base station 30-1 to turn off communication in the low-speed movement mode using channel C+-11 (3756). This channel C)-
When the mobile radio device 50 confirms that communication has stopped due to 11 (3
758), the operation of the synthesizers 55-1 and 56-1 is stopped, and the changeover switch 64-1 is switched to the synthesizer 551.
to the output terminal of the selector switch 64-2.
stops switching to the output terminal of synthesizer 56-1 (
Although this operation is not necessary), channel C
It is made to operate with H2, CH3, . . . , C14n.

Channel C)-11 communication stoppage confirmed at barrier switch 20
The communication path control unit 21 of the switch 5W of the switch group 23
1-2.1-3. −． 1-n remains on and switch 5W1-1 is turned off (S757).

This ends the period of channel switching operation and switches 5W1-2.1-3. −． 1-n in the on state, channel CH2°Ct-t3. -,
Ct-In down frequency F2+'F3. -...F, upstream frequency f, f3. ..., mobile radio device 50 using fo.
between the wireless base stations 30-2. (S759) Since the operation is as described above, in the high-speed movement mode, the mobile radio device 5 moving at high speed
The movement information of 0 is transmitted to the barrier exchange 1ffi 20, and by analyzing this movement information, the movement information is transmitted in advance to the wireless base station 30 or wide area wireless base station 17 in the movement direction of the mobile radio 50, and Since preparations can be made for providing services to the mobile radio device 50 in mobile mode, channel switching during a call can be carried out more smoothly. Further, normally, the time required for switching the channel during a call is completed within 1 to 3 seconds after the switching is decided.

Roughly speaking, when the mobile radio device 50 itself recognizes that it is in the high-speed movement mode, the processes shown in FIGS. 1B, 1H,
Mobile radio device 50 as shown in FIGS. 11 and 1J
(B, C, D), the mobile radio 50 (B, C, D) constantly (or intermittently according to a certain rule) sends high-speed control signals even after channel switching during a call is completed. It transmits data in mobile mode, calls on nearby wide area wireless base stations 17 for high speed mobile mode to implement channel switching during calls, and enables early implementation. It is possible to avoid a situation where the response signal cannot be received.

From the point of view of effective frequency utilization, it is clear that the smaller the zone, the better.

From this point, all mobile radio devices 50 are connected to the wide area radio base station 1.
7 is not a good idea, and it is appropriate to allow communication only in a mode different from the normal state, such as when moving at high speed. In this case, the ratio of high-speed movement mode to all mobile radio devices 50 in the system is a problem, but it is estimated to be within several percent or at most 10%.

For example, if we take the mobile phone shown in the following document Ito "Study of mobile phone system - Focusing on radio line control and routing" as a system, Telecommunications Society Technical Report C387-16 May 1986, Tokyo Assuming that there are 7 million mobile phone owners in the 23 wards, it is estimated that 5% of the total, or 350,000, are used in vehicles.

Hence all mobile radios! If the ratio of fi50 to the number of fi50s is a few percent, it will not be a factor that greatly deteriorates the effective frequency utilization rate of the system, and this aspect also shows the superiority of the present invention.

(6) Estimation of moving direction and speed of mobile radio equipment and communication channel allocation method for traffic congestion countermeasures Mobile radio equipment 5
It is possible to detect the traveling direction and speed of the mobile radio device 50 by measuring and comparing changes in received electric fields or communication quality received by a plurality of radio base stations 30 communicating with the mobile radio device 50.

These will be explained below using FIG. 10.

In FIG. 10, 16 circles each indicate small zones 71 to Z16 within the service area, and wireless bases 130-1, 30-2, . ..., 30
-16 etc. indicate the areas where communication is possible. Mobile radio 1!150 currently communicating is in zone Z6, and radio base 830-2.30-3.30-5.3
Assume that communication is being performed with seven stations 0-6.30-7.30-1C and 30-11 using diversity. Assuming that the mobile wireless IJ device 50 is moving in the direction of the arrow in FIG. , and these values are collected into the mobile radio 50. By comparing these measurement results, the mobile radio device 50 estimates the moving direction and speed of the mobile radio device 50 using the following method.

First, it can be estimated that the moving direction is toward the wireless base station (30-7 in FIG. 10) where the observed input received electric field level changes most rapidly.

In order to obtain reliable results, it is important to choose the measurement duration appropriately. However, this is a mobile radio device 50
It is largely related to the speed of That is, since the radio wave propagation characteristics change from moment to moment, it is possible to eliminate variations in the measured values by measuring at intervals of a certain length of time (3 to 10 seconds in the case of a car). 1st
In Figure 0, when the measurement results obtained in this way are expressed in order from the radio base station 30 with the largest increase in the input electric field, for example, 30-7>30-11>30-3, and the decrease in the input electric field is as follows. If expressed in order from the largest radio base station 30, it would be as follows: 30-6>30-10>30-2>36-5.

Furthermore, the moving speed can be estimated by comparing it with a radio wave propagation curve given by radio wave propagation characteristics.

By using the above measurement results, the destination of the mobile radio device 50 is estimated, and the communication traffic situation of the destination wireless base station 3O is investigated. If the communication traffic is in a congested state, it is determined that the wireless base station 30 is communicating. The type of communication of the mobile radio 1150 makes it possible to reduce the number of radio base stations 30 with which it communicates. Next, when traffic congestion does not extend over one zone but over multiple zones, wide-area congestion comparison measures are required. This is a phenomenon that occurs in car phone systems, etc. in the city center of major cities, and is
0-6.30-7. and 30-11 are in a traffic congestion state. Application of the present invention in this regard will be explained in detail.

Assume that a mobile radio 50a is present in zone Z11, moving in the direction of the arrow, and transmitting a calling signal. This calling signal is collected by the mobile radio 1150a, and the communication channel to be assigned is determined.
1C, 30-11゜30-12.30-14.30-1
5 etc. is allocated (diaperity transmission and reception is performed). However, if there is heavy traffic in the above three zones (Z6.7.11>), channels 30-6, 30-7 and 30-11 will not be allocated. The wireless base station 30 with the best quality is naturally 30-11, but
Not assigned due to the above reasons. If the multiplicity of diversity is the above fourfold (30-10, 30-12, 30
-14゜3O-15) is insufficient, transfer 1Pl.
Since the radio device 50a can estimate the moving direction and moving speed of the mobile radio device 50a, a channel is assigned to be used by the radio base stations 30-8 and 30-16 in the moving direction.

Therefore, although the mobile radio 1fi50a is located in zone Z11, it is located at radio base stations 30-8 and 3, which are slightly far away.
Communication will begin with 0-16.

By applying the channel allocation described above, it becomes possible to take measures against congestion in high-traffic areas, which have not been solved using conventional system technology.

In addition, when the mobile radio device according to the present invention is mounted on a car and used, an example of communicating with a wide range II wireless base station by receiving power from a battery inside the car is shown in FIGS. 8A and 8B. However, the present invention is not limited to automobiles, and the following usage examples are also possible.

That is, when a person is able to carry a portable battery with a relatively large battery capacity, the power supply terminal of the mobile radio 50 and the output terminal of the portable battery are connected using the power cord shown in FIG. 8A. If so, it becomes possible to perform long-term communication with a wide area wireless base station without using the battery built into the mobile wireless device 50.

If you are in a remote mountain area or on the coast, and there is no wireless base station with low power output (about 10mW) nearby even if you want to communicate, you will not be able to make or receive calls as described above when moving at high speed. . Moreover, in this case, it is also impossible to estimate the moving speed of the mobile radio device 50.

However, if a certain time timing is set in the mobile radio device 50 and a call still cannot be made even after that timing, the output of the transmitting section is increased to access the wide area radio base station 17. In some cases, you may be able to make a call. Alternatively, in response to an incoming call, when the location of the mobile radio 50 can be confirmed or estimated at the gateway exchange v120 wide area radio base station 17, the incoming call is executed from the radio base station 30, and after a certain timing elapses. If there is no response even after calling, the wide area wireless base station 17 sends an incoming call signal, and if the mobile wireless device 50 is equipped with a function that allows the wide area wireless base station 17 to respond, This is effective as it may allow you to receive calls.

[Effects of the Invention] As is clear from the above explanation, by applying the present invention to a mobile communication system using a small zone configuration, it is possible to eliminate temporary interruptions when changing zones during a call, as in conventional systems. This problem has been completely eliminated in facsimile signals and data signals due to image quality deterioration and burst signal errors, even if the frequency of channel switching during communication increases. This will improve communication quality by adopting economical transmission/reception diversity, improve frequency efficiency by reducing interference, and make new services using wideband signals technically possible. is what happened. In addition, it is possible to improve communication quality by effectively using wireless equipment during times when traffic is slow, to substantially increase the number of usable channels when traffic suddenly increases in a certain small zone, and to improve communication quality by effectively using wireless equipment during times when traffic is at its peak. In addition to being able to process location registration signals from mobile radios, it is also possible to effectively specify a communication channel by detecting the moving direction and speed of a moving object, which is economical and allows for the use of frequencies. It has become possible to construct a highly efficient mobile communication system.

When mobile radio equipment is moving at high speed, the small zone method using microcells has a technical problem in that signal traffic for location registration increases rapidly. In order to ensure smooth implementation, the solution was made possible by installing wide-area wireless base stations.

Therefore, the effects of the present invention are extremely large.

[Brief explanation of drawings]

Fig. 1Δ, Fig. 1B, Fig. 1C and Fig. 1D are system configuration diagrams showing one embodiment of the present invention, Fig. 1E and Fig. 1
Figure F is a circuit configuration diagram showing another embodiment of the wireless base station of the present invention; Figure 1G is a circuit configuration diagram showing an example of a transceiver used in a wide area wireless base station; Figures 1H and 11; Figure 1 and Figure 1J are circuit configuration diagrams showing other embodiments of the mobile radio device; Figure 1 and Figure 1L are circuit diagrams showing roughly another embodiment of the wireless base station of the present invention; Figures 1 and 1N are circuit configuration diagrams showing other embodiments of the transmitter/receiver, and Figures 2 (a) and (b) are spectral diagrams and circuit configuration diagrams for explaining configuration examples of control signals used in the present invention. , FIG. 3 is a timing chart for explaining the operation of the system shown in FIGS. 18 to 1C, FIGS. 4A and 4B are flowcharts showing the flow of the location registration operation of the present invention, and FIG. 4C Figure 4D, Figure 4E, Figure 4F, Figure 4G,
4H and 4I are flowcharts showing the flow of the location registration operation of the present invention in high-speed movement mode; FIGS. 5A and 5B are flowcharts showing the flow of the calling operation from the mobile radio; FIG. 5C; Figure 5D, Figure 5E, Figure 5F, Figure 5G,
Figures 5H and 51 are flowcharts showing the flow of call origination operations from the mobile thermal i device in high-speed movement mode, and Figures 6A, 6B, and 6C are flowcharts showing the flow of call reception operations to the mobile radio device. Flowcharts shown in Figures 6D and 6E
Fig. 6E, Fig. 6G, Fig. 6H, Fig. 61, Fig. 6J
7A, 7B, 7C, 7D, and 7E are flowcharts showing the flow of call incoming operations to a mobile radio in high-speed movement mode.
The figures are flow charts showing the flow of channel switching operations of the system shown in Figures 18 to 1C, Figures 7F, 7G, 7H, 71, 7J,
7, 7L, and 7M are flowcharts showing the flow of channel switching operations in high-speed movement mode; FIG. 8A is a conceptual configuration diagram when a mobile radio device, which is a mobile phone, is connected to the power source of an automobile; FIG. 8B is a circuit diagram showing an embodiment of the power supply shown in FIG. 8A; FIG. 8C is a circuit configuration diagram showing an embodiment of increasing the transmission output of a mobile radio according to the usage shown in FIG. 8A; Figure 9 is a layout diagram for schematically explaining the relationship between the service areas of wide-area radio base stations and radio base stations, and Figure 10 is an operational conceptual diagram for explaining the traveling direction and speed detection of mobile radio equipment. , FIG. 11 is a conceptual system configuration diagram for explaining an example of a conventional system. 11... Switching equipment 13A-D... Radio base station 15... Mobile radio device 10... Telephone network. 12...Radio line control station 14A-D...Zone 16A-D...Transmission path 17-1.17-2. ...1.7 19.20...Gateway exchange 21...Call path control section 24...IDIE-specific storage section 25...Interface section 26...Angle modulator 29...Transmission power Amplifiers 3C, 30B, 30C. 30-1. ~30-n...Radio base station 31.31-1
~31-n...Transmission unit 32...Radio base station control device 33.33-1~33-n...Reception unit 34.34G,
34-1 to 23... Switch group i... Wide area transmission base station 27... Transmission mixer 34-n... ID identification storage unit 35-1 to 35-n, 36-1 to 36-n. ... Synthesizer 37 ... Communication quality monitoring section 38. 38B, 38C ... Control section 39 ... Interface 4C, 400 ... Reference crystal oscillator 41 ... Transmission mixer 42 ... Interference disturbance detector 43 ...Reception mixer 45...Reception switching controller 46...Radio transmitting circuit 47...Transmission switching controller 48...Radio receiving circuits 5C, 50B, 50C, 50D...Mobile radio equipment 51・
...Transmitting section 53.53-1 to 53-n...Receiving section 54...ID
-Roam area information verification storage unit 55-1 to 55-n, 5
6-1 to 56-n...Synthesizer 57...Communication quality monitoring unit 58, 588. 58C, 58D...Jstm section 59...telephone section 61.61-1 to 61-n...transmission mixer 62...
Interference detectors 63.63-1 to 63-n...reception mixer 64-1.
64-2.64-3...Selector switch 65C...Reception switching controller 66.66-1 to 66-n...Radio transmitter circuit 67C.
...Transmission switching controller 68.681-5 F3-n...Radio reception circuit 69
...Mixing circuit 71...Reference crystal oscillator 77
... Transmission amplifier 78 ... Transmission amplification controller 79
...Transmission output selector switch 91...Digital encoding circuit 92...Multiple conversion circuit 93-1 to 93-rn...Communication quality monitoring receiver 94
. . . Control transmitter/receiver 96 . ~15
5-3...Local valve @ Sae 56-1~156-3...Transmission mixer 57...Reference crystal oscillator 58-1~158-3...Transmission power amplifier 61-1~
161-3...Reception mixer 62-1 to 162-3...
- Demodulator 1 to 716...Zone.

Claims (1)

[Claims] 1. Each radio base means (30, 30B, 30C) that covers a plurality of zones and constitutes a service area.
, 30D, 30E) and at least one wide area radio base means (17) covering said service area and transmitting and receiving control and communication signals on demand;
Mobile radio means (50
, 50B, 50C, 50D), and when the mobile radio means sends out a location registration signal containing its own identification information for registering its location, it is determined that the location registration signal among the radio base means is good. At least one of the radio base means capable of communicating receives the radio base means in the state of communication, and the barrier exchange means (20
), and the barrier exchange means to which the location registration signal is transferred receives the identification information of the mobile radio means included in the location registration signal and the radio base capable of communicating with the mobile radio means. At the same time as registering the identification information of the means, the registered information is returned to the mobile radio means via the radio base means related to the registered identification information, and the reply is sent to the mobile radio means that received this reply. If at least one of the barrier exchange means, the radio base means and the mobile radio means determines that the method of storing registered information that has been carried out cannot be carried out, In order to register a location, the at least one wide area wireless base means transmits a location registration signal including its own identification information to the at least one wide area wireless base means existing in the vicinity, and the at least one wide area radio base means that has received the location registration signal in good condition. The radio base means transfers the location registration signal to the barrier exchange means connected to the at least one wide area radio base means via a transmission path, and identifies the mobile radio means included in the location registration signal. registering information and identification information of the at least one wide area radio base means capable of communicating with the mobile radio means, and transmitting the registered information via the at least one wide area radio base means related to the registered identification information; A communication method for mobile communication in which a reply is sent to the mobile radio means and the registered information sent back is stored in the mobile radio means that received the reply. 2. Each radio base means (30, 30B, 30C,
30D, 30E); at least one wide area radio base means (17) covering said service area and transmitting and receiving control and communication signals on request; and mobile radio means (17) located within said service area. 50, 50B, 50C, 50
D) Connecting each of the radio base means and the wide area radio base means to a general telephone network, and at least one of the radio base means and at least one of the radio base means capable of communicating well with the mobile radio means and the mobile radio means. registering identification information of at least one of the wide area radio base means, and registering identification information of at least one of the at least one wide area radio base means and a communication path between the at least one of the at least one wide area radio base means and the mobile radio means; The setting is canceled, and as the mobile radio means moves, the identification information of at least one of the at least one radio base means and at least one wide area radio base means with which communication is possible is updated and registered, and the identification information of at least one of the registered at least one radio base means is updated and registered. 1. A communication system for mobile communication, comprising: one radio base means; and a barrier exchange means (20) for making and receiving calls to said mobile radio means via at least one of said at least one wide area radio base means. 3. Each radio base means (30, 30B, 30C,
30D, 30E); at least one wide area radio base means (17) covering said service area and transmitting and receiving control and communication signals on request; and mobile radio means (17) located within said service area. 50, 50B, 50C, 50
D), and at least one device that connects each of the radio base means to a general telephone network (10), connects the mobile radio means, and can communicate well with the mobile radio means and the mobile radio means.
registering the identification information of one of the radio base means, canceling the setting of a communication path between the at least one radio base means and the mobile radio means, and as the mobile radio means moves, updating and registering the identification information of the wireless base means, making and receiving calls to the mobile radio means via the registered wireless base means, and setting a new communication path for making and receiving calls between the mobile radio means and the wireless base means; If at least one of the radio base means, the mobile radio means and itself determines that it is difficult to communicate with the mobile radio means, the identification information of at least one wide area radio base means that can communicate well with the mobile radio means is transmitted. recording, and canceling the setting of a communication path between the at least one wide area radio base means capable of good communication and the mobile radio means, and as the mobile radio means moves, A communication system for mobile communication, comprising: barrier exchange means for updating and registering identification information of a radio base means and for making and receiving calls to the mobile radio means via the registered wide area radio base means.