JPH1084586A - Radio channel initial transmission method in mobile communication system and base station or mobile station radio station device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce unnecessary interference to other wireless lines and wasteful battery consumption of a mobile station by not transmitting unnecessary general information in an initial stage of wireless line setting. An object of the present invention is to provide a radio channel initial transmission method in a mobile communication system and a radio station device for a base station or a mobile station. SOLUTION: A radio station 1 always transmits only essential information to a radio station 2 in setting a downlink radio line, and after establishing synchronization, the radio station 2 always transmits only essential information and completes synchronization establishment of a downlink radio line. After transmitting the notification, the wireless station 1 detects the completion of the synchronization establishment of the downlink radio line after the synchronization is established, transmits all the information obtained by adding other general information to the essential information at all times, and confirms the completion of the synchronization establishment of the uplink radio line Notifying the wireless station 2, the wireless station 2 detects the completion of the establishment of the synchronization of the uplink wireless channel, and always transmits all information obtained by adding other general information to essential information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio channel initial transmission method and a radio station for a base station or a mobile station in a mobile communication system in which a base station and a mobile station communicate with each other via a radio channel. The present invention relates to a radio channel initial transmission method for starting setting of a radio channel between a base station and a mobile station, and a base station or mobile station radio station device.

[0002]

2. Description of the Related Art In a mobile communication system, a radio channel between a base station and a mobile station repeatedly transmits radio frames as shown in FIG. This wireless line is mainly composed of always essential information such as wireless line synchronization information and transmission power control information, and other general information that is not always essential such as user information and control information.

[0003] Conventionally, when setting up a wireless line such as when making an outgoing / incoming call and when starting a handover, the transmitting side in the communication between the base station and the mobile station is the user from the start of the wireless line transmission until the establishment of synchronization. Despite the fact that no information or control information has yet been included, these other general information are always transmitted in addition to the essential information, all the time in the radio frame.

[0004]

As described above, in the prior art, other general information such as user information and control information that are not yet required is also included in the radio frame during the initial period from the start of transmission of the radio line to the establishment of synchronization. Since the transmission is performed for the entire time, there is a problem that the wireless station unnecessarily interferes with another wireless channel and that the mobile station battery is wastefully consumed especially in the uplink wireless channel.

[0005] In particular, in a CDMA mobile communication system, since the amount of interference has a great effect on the system capacity, an increase in the amount of interference greatly reduces the system capacity.
This is a very big problem.

[0006] The present invention has been made in view of the above,
An object of the present invention is to provide a mobile communication system in which unnecessary general information is not transmitted in an initial stage of wireless channel setting, thereby reducing unnecessary interference to other wireless channels and wasting of a mobile station battery. It is an object of the present invention to provide a wireless channel initial transmission method and a base station apparatus and a mobile station apparatus.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method for initial transmission of a radio link in a mobile communication system in which a base station and a mobile station communicate with each other via a radio link. (2) When setting up a radio link between the base station and the mobile station, the transmitting side of the base station and the mobile station always transmits only essential information in the radio link transmission signal, and (b) reception of the base station and the mobile station. Transmitting an always-indispensable signal and general information other than the always-indispensable information from the transmitting side after proper reception of the wireless line is enabled on the wireless side. I will provide a.

According to the method for initial transmission of a radio channel in this mobile communication system, only the essential information portion is always transmitted at the time of setting the radio channel. Since the information is always transmitted in addition to the essential information, other general information is not transmitted until proper reception of the wireless line becomes possible, so that the other general information may cause unnecessary interference with other wireless lines. Also, the battery of the mobile station is not wasted on the uplink radio line.

Further, in the present invention, the always essential information includes synchronization information.

In the present invention, (c) synchronization is established on the receiving side using the synchronization information transmitted in the step (a), and the receiving side notifies the transmitting side of the completion of the synchronization establishment, When the transmission side is notified of the completion of the synchronization establishment in the step (c), the transmitting side transmits the always-required information and the general information in the step (b). According to the initial transmission method, only the synchronization information is always transmitted first as essential information, and after synchronization is established, other general information is transmitted in addition to the synchronization information. Therefore, other general information is not transmitted until synchronization is established. The other general information will not wastefully interfere with the other wireless links, and the battery of the mobile station will not be wasted on the uplink wireless link.

Further, in the present invention, the always essential information includes synchronization information and transmission power control information.

In the present invention, (d) synchronization is established on the receiving side using the synchronization information transmitted in the step (a), and the transmission power control information transmitted in the step (a) is used. Then, the receiving side starts transmission power control, and the receiving side notifies the transmitting side of the completion of synchronization establishment and the start of transmission power control, and the transmitting side performs step (d).
When the completion of synchronization establishment and the start of transmission power control are notified in step (b), the constant information and the general information are transmitted in step (b).

According to the radio channel initial transmission method in the mobile communication system, only the synchronization information and the transmission power control information are always transmitted as essential information first, and after synchronization is established and transmission power control is started, other general information is synchronized. Since information and transmission power control information are transmitted in addition to other general information is not transmitted until synchronization is established and transmission power control is started,
The other general information will not wastefully interfere with other wireless channels, and the mobile station battery will not be wasted on the uplink wireless channel.

Further, according to the present invention, the mobile communication system is a CDMA mobile communication system.

According to the radio channel initial transmission method in the mobile communication system, in a CDMA mobile communication system in which the amount of interference has a great influence on the system capacity, it is possible to prevent the useless amount of interference from being given. Can be prevented.

Further, the present invention relates to a base station or mobile station radio apparatus in a mobile communication system in which a base station and a mobile station communicate with each other via a radio channel, wherein the radio station transmission information is always required information. And a general information generating means for generating general information other than the always required information, and transmitting only the always required information when setting up a wireless line between the base station and the mobile station. And transmitting means for transmitting the always-indispensable signal and the general information after the other radio station which is the other of the base station and the mobile station can properly receive the radio channel. And a base station or a mobile station radio station device in a mobile communication system.

According to the base station or the mobile station radio station apparatus in this mobile communication system, when setting the radio channel,
Always transmit only the essential information part first, and after proper reception of the wireless line is possible, until other general information is always transmitted in addition to the essential information, until the proper reception of the wireless line becomes possible Since no other general information is transmitted, the other general information does not wastefully interfere with other wireless circuits, and the battery of the mobile station is not wasted on the uplink wireless circuit.

Further, in the present invention, the always required information generating means generates the always required information including synchronization information.

In the present invention, the apparatus further comprises synchronization establishing means for establishing synchronization using the synchronization information transmitted from the another wireless station, wherein the transmitting means is configured to perform synchronization when the synchronization establishing means establishes synchronization. , The completion of synchronization establishment is notified to the other wireless station, and the other wireless station transmits the always-indispensable information and the general information when notified of completion of synchronization establishment.

According to the base station or the mobile station radio station apparatus in this mobile communication system, only synchronization information is always transmitted first as essential information, and after synchronization is established, other general information is transmitted in addition to the synchronization information. However, since other general information is not transmitted until synchronization is established, the other general information does not cause unnecessary interference to other wireless channels, and the mobile station battery is wasted on the uplink wireless channel. Disappears.

Further, in the present invention, the always required information generating means generates the always required information including synchronization information and transmission power control information.

In the present invention, the synchronization establishing means for establishing synchronization using the synchronization information transmitted from the another wireless station, and the transmission power control information transmitted from the other wireless station using the transmission power control information. Transmission power control means for controlling transmission power of the means, wherein the transmission means completes synchronization establishment when the synchronization establishment means establishes synchronization and the transmission power control means starts transmission power control. Notifying the other wireless station of the start of transmission power control, the other wireless station always transmits essential information and the general information when notified of completion of synchronization establishment and start of transmission power control. Features.

According to the base station or the mobile station radio station apparatus in this mobile communication system, only synchronization information and transmission power control information are always transmitted as essential information first, and after synchronization is established and transmission power control is started, other information is transmitted. Since the general information is transmitted in addition to the synchronization information and the transmission power control information, no other general information is transmitted until the synchronization is established and the transmission power control is started, so that the other general information wastefully interferes with another wireless line. , And the battery of the mobile station is not wasted on the uplink radio line.

Further, according to the present invention, the mobile communication system is a CDMA mobile communication system, and
It is characterized in that a radio line transmission signal is transmitted by a DMA method.

According to the base station or the mobile station radio station apparatus in this mobile communication system, in a CDMA mobile communication system in which the amount of interference greatly affects the system capacity, it is possible to prevent the useless amount of interference from being applied to the system. It is possible to prevent the capacity from being greatly reduced.

[0026]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a radio station apparatus used as each of a base station and a mobile station for performing a radio channel initial transmission method in a mobile communication system according to one embodiment of the present invention. Although the base station or mobile station radio station apparatus shown in FIG. 1 shows only a portion related to the radio channel initial transmission method of the present embodiment, this portion has the same configuration in both the base station and the mobile station.

The base station or mobile station radio station apparatus shown in FIG. 1 has a control unit 20 for performing overall control.
An instruction signal from 0 is supplied to a transmission power control information generation unit 1, a synchronization state notification information generation unit 2, a synchronization information generation unit 3, and a user information generation unit 4. The transmission power control information generation unit 1 generates transmission power control information in a form that allows the other station to recognize the valid state / invalid state of the transmission power control information transmitted from its own station in accordance with an instruction from the control unit 20, and The power control information is always supplied to the essential information configuration unit 5. Here, when the transmission power control information is in the valid state, the transmission power control information generation unit 1 instructs the partner station to increase / decrease the transmission power according to the reception quality notified from the reception product measuring unit 16. The transmission power control information is generated and supplied to the essential information configuration unit 5 at all times.

The synchronization status notification information generation unit 2 includes a control unit 20
Generates synchronization state notification information indicating the specified synchronization establishment OK / NG, and always supplies the information to the essential information configuration unit 5. Further, the synchronization information generation unit 3 periodically generates synchronization information in accordance with an instruction from the control unit 20, and always generates the synchronization information.
To supply. The user information generation unit 4 supplies the original user information received from the control unit 20 to the general information configuration unit 6 in a predetermined format.

The always-indispensable information forming unit 5 receives the synchronization information from the synchronization information generation unit 3, the transmission power control information from the transmission power control information generation unit 1, and the synchronization state notification information from the synchronization state notification information generation unit 2. Upon receiving the information, it always configures essential information including the information and supplies it to the signal format configuration unit 7. Further, the general information forming unit 6 forms general information which is information other than the always necessary information including user information, and supplies the formed information to the signal format forming unit 7. The general information configuration unit 6 does not configure general information unless a supply permission signal is input from the control unit 20, and does not supply general information to the signal format configuration unit 7.

The signal format composing section 7 includes the always essential information from the always essential information composing section 5 and the general information composing section 6.
A signal format of the transmission signal is formed from the general information from, and is supplied to the encoding unit 8. If the information is not supplied from the general information forming unit 6, the part where the general information on the signal format is arranged is left empty. I do.

The transmission signal of the signal format constituted by the signal format construction unit 7 is encoded by the encoding unit 8,
The signal is modulated by the modulator 9 and supplied to the transmitter 10. The transmission unit 10 performs D / A conversion, frequency conversion, and amplification of the transmission signal encoded by the encoding unit 8 and modulated by the modulation unit 9, and transmits the transmission signal from the antenna 21 to the partner station via the transmission / reception distribution unit 12. I do. In this amplification, amplification is performed so as to realize the transmission power value specified by the transmission power determining unit 11.
In the signal format from the signal format configuration unit 7, transmission control is performed so as to not transmit an empty portion.

The transmission signal from the partner station is received by the antenna 21 and supplied to the demodulation unit 14 via the transmission / reception distribution unit 12 and the reception unit 13, where the reception signal is demodulated and demodulated. The signal is supplied to the synchronization establishing unit 15 and the reception quality measuring unit 16. The synchronization establishing unit 15 establishes frame synchronization with the demodulated signal, supplies the synchronization timing signal and the demodulated signal to the transmission power control information extracting unit 18, the synchronization state notification information extracting unit 19, and the decoding unit 17, and sets the synchronization state (synchronization establishment Information indicating OK / NG is sent to the control unit 20. Further, reception quality measurement section 16 measures the reception quality of the demodulated signal and supplies the measured value to transmission power control information generation section 1.

The transmission power control information extracting section 18 extracts transmission power control information from the demodulated signal based on the synchronization timing signal, and supplies it to the transmission power determining section 11 and the control section 20. The transmission power determination unit 11 includes a transmission power control information extraction unit 1
According to the transmission power control information supplied from 8, the transmission power value is determined, and the determined transmission power value is notified to the transmission unit 10. The synchronization state notification information extraction unit 19 extracts the synchronization state notification information from the demodulated signal based on the synchronization timing signal, and supplies the synchronization state notification information to the control unit 20.

It should be noted that the modulation section 9 performs normal modulation and spreading with a spreading code on the transmission signal,
By performing despreading and normal demodulation on the received signal in step 4 with a spreading code, the base station or mobile station radio station apparatus shown in FIG. 1 is applicable to a CDMA mobile communication system.

Next, the operation will be described with reference to the sequence chart shown in FIG.

Although the sequence chart shown in FIG. 2 shows the operation at the time of setting the radio channel between the base station and the mobile station, the configurations of the base station and the mobile station are the same as shown in FIG. However, since the same operation is performed regardless of which is the wireless channel setting start side, the base station and the mobile station are shown as the wireless station 1 and the wireless station 2 so as not to limit the base station and the mobile station. It is shown that the wireless station 2 may be used. Further, in FIG.
The flow of a signal from the wireless station 2 to the wireless station 1 will be described as down, and the flow of a signal from the wireless station 2 to the wireless station 1 will be described as up. Further, the process of FIG. 2 describes a case where the transmission information is not used, and the synchronization information and the synchronization state notification information are always used as essential information.

The control unit 20 of the radio station 1 sets the downlink radio channel to the radio station 2 and, at the beginning of the radio channel setting, does not establish synchronization with the radio station 2 as the partner station. It does not supply the original user information to the information generation unit 4, does not permit the general information configuration unit 6 to perform general information configuration processing, and sends the synchronization status notification information generation unit 2 and the synchronization information generation unit 3 synchronization status Instruct generation of notification information and synchronization information. In this case, information indicating synchronization establishment NG is set as the synchronization state notification information. As described above, the sequence chart shown in FIG. 2 shows a case where the always essential information includes the synchronization state notification information and the synchronization information and does not include the transmission power control information.

The generated synchronization status notification information and synchronization information are supplied to the always required information forming unit 5, and the always required information including these pieces of information is configured. This always essential information is supplied to the signal format configuration unit 7, where the signal format of the transmission signal is configured. In the state where the initial synchronization of the wireless channel setting has not been established, since the general information is not supplied from the general information forming unit 6, the portion for arranging the general information on the signal format from the signal format forming unit 7 is empty. Has been.

As described above, the transmission signal of the signal format which does not include the general information but always includes only the essential information is:
The signal is encoded by the encoder 8, modulated by the modulator 9, and transmitted by the transmitter 1.
0 is supplied. Here, the transmission signal is D / A converted, frequency converted and amplified, and transmitted from the antenna 21 to the wireless station 2 via the transmission / reception distribution unit 12 (process (1) in FIG. 2).

The radio station 2 transmits the transmission signal of only the essential information consisting of the synchronization state notification information and the synchronization information of the downlink radio channel transmitted from the radio station 1 to the reception unit 13 via the antenna 21 and the transmission / reception distribution unit 12. The signal is received and demodulated by the demodulation unit 14. This demodulated signal is supplied to the synchronization establishing unit 15, and the synchronization establishing unit 15 establishes frame synchronization of the downlink radio channel based on the synchronization information (process (2) in FIG. 2), and notifies the synchronization timing signal and the demodulated signal of the synchronization state. The information indicating the synchronization state is supplied to the information extracting unit 19 and the decoding unit 17, and is supplied to the control unit 20. Note that in the state where the setting of the wireless channel from the wireless station 1 has just started, the synchronization has not been established, and the information indicating the synchronization state is NG, as described above.

When the synchronization establishment of the downlink radio channel is completed, the control unit 20 of the radio station 2 sets the synchronization status notification information generation unit to set the uplink radio channel to the radio station 1 as in the case of the radio station 1. 2 and the synchronization information generation unit 3 are instructed to generate synchronization status notification information and synchronization information indicating that synchronization has been established, and the synchronization status notification information and the synchronization information are always supplied to the essential information forming unit 5. Configure required information. This always essential information is further supplied to the signal format composing unit 7 to constitute the signal format of the transmission signal consisting of only the always essential information. In a state in which the setting process of the wireless channel from the wireless station 2 has just started, the general information is not supplied from the general information forming unit 6 and only the essential information is always transmitted to the wireless station 1 as an uplink wireless channel. As the synchronization state notification information, the wireless station 1 is notified of the completion of synchronization establishment of the downlink wireless channel (synchronization establishment OK) (process (3) in FIG. 2).

The radio station 1 transmits the transmission signal of only the essential information consisting of the synchronization status notification information and the synchronization information of the uplink radio channel transmitted from the radio station 2 to the reception unit 13 via the antenna 21 and the transmission / reception distribution unit 12. The signal is received and demodulated by the demodulation unit 14. This demodulated signal is supplied to the synchronization establishing unit 15, and the synchronization establishing unit 15 establishes frame synchronization of the uplink radio channel based on the synchronization information (process (4) in FIG. 2), and notifies the synchronization timing signal and the demodulated signal of the synchronization state. The information is supplied to the information extracting unit 19 and the decoding unit 17, and information indicating that the synchronization state of the downlink radio channel is “synchronization is OK” is supplied to the control unit 20.

The control unit 20 of the wireless station 1 transmits the synchronization establishment OK
When the completion of the synchronization establishment of the downlink radio line is detected from the information indicating the above (process (5) in FIG. 2), the user information generation unit transmits all the information including the general information in addition to the essential information at all times on the downlink radio line. 4 and supplies the original user information to the general information composing unit 6 and permits the general information composing unit 6 to compose the general information. The general information is supplied to the signal format forming unit 7, and the signal format forming unit 7 forms a signal format including all information including general information and always essential information. Then, all the information including the always essential information and the general information is started to be transmitted from the wireless station 1 through the downlink wireless channel, and the synchronization status notification information of the downlink wireless channel indicates that the establishment of the synchronization of the uplink wireless channel is completed. A notification is sent to the station 2 (process (6) in FIG. 2).

When receiving the downlink radio channel from the radio station 1, the radio station 2 detects that the synchronization establishment of the uplink radio channel has been completed based on the synchronization status notification information of the downlink radio channel (processing (7 in FIG. 2). )), Thereby starting transmission of all information including not only essential information but also general information to the wireless station 1 on the uplink wireless line in the same manner as described above (process (8) in FIG. 2).

Next, with reference to a sequence chart shown in FIG. 3, a description will be given of a process similar to that shown in FIG. 2 in the case where transmission power control information is always transmitted as essential information.

The processing shown in FIG. 3 includes the transmission power control information generated from transmission power control information generating section 1 as always essential information in the processing shown in FIG. 2, and the transmission power of the transmission signal is calculated according to the transmission power control information. To the transmission power determination unit 11
And the reception quality measurement unit 16 measures the reception quality of the signal received from the partner radio station, and the transmission power control information generation unit 1 determines the transmission power control information based on the reception quality. In addition, the transmission power control information generated by the transmission power control information generation unit 1 is set to an invalid state at an initial stage of starting the setting of the wireless channel,
A signal is received from a partner radio station, and is set to a valid state from the time when the reception quality is measured.

In the processing of FIG. 3, the internal operation of each radio station shown in FIG. 5, the transmission power control information extracting unit 18 extracts transmission power control information from the signal received from the partner radio station, and the transmission power determination unit 11 determines the transmission power value based on the transmission power control information. The transmission power of the transmission signal from the transmission unit 10 is controlled with this transmission power value,
Further, unlike the process described with reference to FIG. 2, only the point that the reception quality of the reception signal measured by the reception quality measurement unit 16 is supplied to the transmission power control information generation unit 1 to determine the transmission power control information is added. Therefore, description will be made mainly with reference to FIG.

In FIG. 3, when setting a downlink radio channel to radio station 2, radio station 1 transmits only essential information, including synchronization information and transmission power control information, on the downlink radio channel. The general information from 6 is not transmitted. Also, at the start of wireless channel setting, the transmission power control information is set to an invalid state (process (1) in FIG. 3).

Upon receiving the downlink radio channel from the radio station 1, the radio station 2 establishes synchronization of the downlink radio channel using the synchronization information of the downlink radio channel (process (2) in FIG. 3). In addition, the wireless station 2 always transmits only essential information including synchronization information and transmission power control information on the uplink wireless channel, and does not transmit general information. In this case, the radio station 2 receives the downlink radio channel from the radio station 1 and determines the transmission power control information in the transmission power control information generation unit 1 based on the reception quality. The power control information is set to a valid state (process (3) in FIG. 3).

When receiving the uplink radio channel from the radio station 2, the radio station 1 establishes the synchronization of the uplink radio channel using the synchronization information of the uplink radio channel (process (4) in FIG. 3). Further, the wireless station 1 detects that the transmission power control information of the uplink wireless channel is in a valid state (process (5) in FIG. 3), and constantly transmits all information including general information in addition to the essential information on the downlink wireless channel. Transmission is started (process (6) in FIG. 3). In this case, the radio station 1 determines the transmission power of the downlink radio channel from the transmission power control unit 1 according to the transmission power control information in the uplink radio channel from the radio station 2.
1, the transmission power control information of the downlink radio channel is enabled, the reception quality of the uplink radio channel is measured by the reception quality measuring section 16, and the transmission power control information generation section 1 according to the reception quality. The transmission power control information is generated.

When receiving the downlink radio channel from the radio station 1, the radio station 2 detects that the transmission power control information of the downlink radio channel is in the valid state (process (7) in FIG. 3), The transmission of all information including general information in addition to the essential information is always started on the uplink radio line (process (8) in FIG. 3).
Further, in this case, the wireless station 2 adjusts the transmission power of the uplink wireless channel by the transmission power determination unit 11 according to the transmission power control information from the wireless station 1 in the downlink wireless channel. In this case, the transmission power control information of the uplink radio channel transmitted from the radio station 2 is naturally set to the valid state.

In FIG. 4, if it is detected that the transmission power control information is in a valid state, it naturally indicates that the synchronization has already been established at that time. The valid state of the control information can be regarded as a notification indicating both the completion of synchronization establishment and the start of transmission power control. However, instead of this, the process of FIG. 3 and the process of FIG. 4 may be combined as they are to provide a notification that clearly indicates the completion of synchronization establishment and the start of transmission power control.

[0054]

As described above, according to the present invention,
When setting up a wireless line, only the required information is always transmitted first, and after proper reception of the wireless line becomes possible, other general information is always transmitted in addition to the required information. Since other general information is not transmitted until the transmission becomes possible, the other general information does not cause unnecessary interference to other wireless circuits, and the mobile station battery is wasted on the upstream wireless circuit. Is also gone.

According to the present invention, only the synchronization information is always transmitted first as essential information, and after synchronization is established, other general information is transmitted in addition to the synchronization information. Since it is not transmitted, the other general information does not wastefully interfere with other wireless channels, and the mobile station battery is not wasted on the uplink wireless channel.

Furthermore, according to the present invention, only the synchronization information and the transmission power control information are always transmitted first as essential information, and after the establishment of the synchronization and the start of the transmission power control, other general information is transmitted to the synchronization information and the transmission power control information. In addition to this, since other general information is not transmitted until synchronization is established and transmission power control is started, the other general information does not cause unnecessary interference to other radio lines, and Therefore, the battery of the mobile station is not wasted.

In particular, in a CDMA mobile communication system, the amount of interference has a large effect on the system capacity. However, the present invention, which does not give useless interference, can prevent the system capacity from being greatly reduced. Very effective for the system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a radio station device used as each of a base station and a mobile station that implement a radio channel initial transmission method in a mobile communication system according to an embodiment of the present invention.

FIG. 2 is a sequence chart showing an operation when synchronous information is always transmitted as essential information in the embodiment of FIG. 1;

FIG. 3 is a sequence chart showing an operation when synchronous information and transmission power control information are always transmitted as essential information in the embodiment of FIG. 1;

FIG. 4 is a diagram showing a configuration of a radio frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission power control information generation part 2 Synchronization state notification information generation part 3 Synchronization information generation part 4 User information generation part 5 Always essential information formation part 6 General information formation part 7 Signal format formation part 15 Synchronization establishment part 18 Extraction of transmission power control information Unit 19 synchronization state notification information extraction unit 20 control unit

Claims (12)

[Claims] 1. A method for initial transmission of a radio link in a mobile communication system in which a base station and a mobile station communicate with each other via a radio link, comprising: (a) setting a radio link between the base station and the mobile station; The transmitting side of the base station and the mobile station always transmits only essential information of the radio line transmission signal, and (b) after the receiving side of the base station and the mobile station can properly receive the radio line. Transmitting an always-indispensable signal and general information other than the always-indispensable information from the transmitting side. 2. The method according to claim 1, wherein the always essential information includes synchronization information. (C) establishing synchronization on the receiving side using the synchronization information transmitted in the step (a), and notifying the transmitting side of the completion of the synchronization establishment from the receiving side; 3. The radio link in the mobile communication system according to claim 2, wherein when the completion of the synchronization establishment is notified in step (c), the constant information and the general information are transmitted in step (b). Initial transmission method. 4. The method according to claim 1, wherein the always-indispensable information includes synchronization information and transmission power control information. And (d) establishing synchronization on the receiving side using the synchronization information transmitted in the step (a), and using the transmission power control information transmitted in the step (a). In step (d), the receiving side notifies the transmitting side of the completion of the synchronization establishment and the start of the transmission power control, and in step (d), the transmitting side completes the synchronization establishment and performs the transmission power control. 5. The method according to claim 4, wherein when the start is notified, the constant information and the general information are transmitted in the step (b). 6. The method according to claim 1, wherein the mobile communication system is a CDMA mobile communication system. 7. A radio apparatus for a base station or a mobile station in a mobile communication system in which a base station and a mobile station communicate with each other via a radio channel, wherein the radio station always generates essential information among radio channel transmission information. Required information generating means, general information generating means for generating general information other than the always required information, and transmitting only the always required information at the time of setting up a radio line between the base station and the mobile station; Mobile communication, comprising: a transmission means for transmitting the always-indispensable signal and the general information after the other radio station on the other side of the mobile station can properly receive the radio link. A base station or mobile station radio station device in the system. 8. The base station or mobile station radio station apparatus in a mobile communication system according to claim 7, wherein said always required information generation means generates said always required information including synchronization information. 9. The communication apparatus according to claim 8, further comprising: a synchronization establishing unit configured to establish synchronization using synchronization information transmitted from the another wireless station, wherein the transmitting unit establishes synchronization when the synchronization establishing unit establishes synchronization. 9. The mobile station according to claim 8, wherein completion of the synchronization is notified to the other radio station, and the other radio station transmits the always-indispensable information and the general information when notified of the completion of the synchronization establishment. A radio station device for a base station or a mobile station in a communication system. 10. The base station or mobile station in a mobile communication system according to claim 7, wherein said always required information generating means generates said always required information including synchronization information and transmission power control information. Radio station device. 11. A synchronization establishing means for establishing synchronization using synchronization information transmitted from the other wireless station, and a transmission power of the transmitting means using transmission power control information transmitted from the other wireless station. Transmission power control means for controlling the transmission power control means, when the synchronization establishment means establishes synchronization and the transmission power control means starts transmission power control, completion of synchronization establishment and transmission power control Notify the other radio stations of the start,
The base station or the base station in the mobile communication system according to claim 10, wherein the other wireless station always transmits essential information and the general information when the completion of synchronization establishment and the start of transmission power control are notified. Mobile station radio station device. 12. The base station or mobile station in a mobile communication system according to claim 7, wherein said mobile communication system is a CDMA mobile communication system, and said transmitting means transmits a radio channel transmission signal in a CDMA system. Radio station equipment.