JPS602811B2 - Wireless line specification method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a line designation method for mobile radio equipment, and particularly to designation of changing transmission and reception frequencies of a radio base station.

BACKGROUND OF THE INVENTION Conventionally, mobile radio telephone devices used include those having only one telephone line and those having multiple telephone lines. In this case, considering the efficiency of the wireless line, it is clear that a method in which multiple lines are used by multiple subscribers is desirable. On the other hand, as a characteristic of mobile radio systems, there is a limit to the service area of a single radio base station due to restrictions on the reachable distance of radio waves, and it is now necessary to cover the required service area with multiple radio base stations. In many cases.
FIG. 1 shows this as an example. That is, in this example, the three areas ZA, ZB, and ZC are the service areas. Another thing to be careful of here is interference in the wireless line. In order to avoid this interference, it is necessary at least not to use the same radio frequency at the same time in adjacent areas. Therefore, if a mobile radio subscriber moves throughout the current service area, in order to be able to make calls, it is necessary to use a mobile radio that has multiple radio lines so that different radio frequencies can be used in each city. , it is necessary to prepare base station wireless transceivers compatible with all radio frequencies for each service area. However, even in this case, the mobile radio device may have multiple radio lines. In the latter case, in order to increase the usage efficiency of base station wireless transceivers and increase economic efficiency, each base station wireless transmitter/receiver is equipped with a key for transmitting and receiving all wireless lines, reducing the overall number of base station wireless transmitters/receivers. A method is used to reduce the In this case, the method for specifying the trout line line to the base station wireless transceiver is that when the wireless line is specified to the terminal mobile radio, the control device attached to the base station wireless transceiver receives the specified signal, and the transmitter/receiver is A method is used to set it to a designated line. Examples thereof are shown in FIGS. 2 and 3. Figure 2 is a circuit diagram showing an overview of the overall line specification method;
The figure is a circuit diagram showing the method for transmitting and receiving the designated signal and specifying the wireless line.In other words, it shows that the wireless line was previously specified using an audible sound signal.Details Then, in Fig. 3, before the call starts, whether the terminal mobile radio is making a call or receiving a call,
First, the base station wireless transceiver B-TR is connected via a dedicated control wireless line.
A connection is made between X and the terminal mobile radio. Therefore,
The mobile radio exchange sends a call radio line designation signal as an audible sound signal to the terminal mobile radio via the control dedicated radio line. On the other hand, this audible sound signal is transmitted to the base station wireless transceiver B.
-Base station controller B-CO so that it can also be received on TRX
A NT signal receiver REC is connected. Upon receiving this radio channel designation signal, the base station radio transceiver B-TRX and the terminal mobile radio are simultaneously switched to the same radio channel for communication and a telephone conversation is started. The purpose of the present invention is to specify an intermittent direct current signal instead of the conventional system that uses an audible sound signal for the wireless line designation signal, which requires an expensive signal receiver for the control device of the base station transceiver. The object of the present invention is to provide an inexpensive line specification method for mobile radio equipment by using the present invention for signals.

INDUSTRIAL APPLICATION This invention is used for the telephone apparatus etc. which use a radio line as shown in FIG. 1 and FIG.

Up until now, the transceivers used in mobile radio systems have been designed so that the terminal mobile radio selects and uses one radio line from among multiple radio lines in order to use the radio lines with high efficiency. There is. On the other hand, base station wireless transceivers are generally used by being fixed to a specific wireless line. In this case, the mobile radio terminal moves within the service area of one base station during a call,
If the user went outside the service area of the base station, the call would have to be terminated because the radio waves would not reach him. Therefore, if you want to continue the call, either switch the terminal's mobile radio to a wireless line that can be used in one base station service area after moving, or use base station wireless transmission and reception in one base station service area after moving. There is no other way than to use the radio line used by the terminal mobile radio as the terminal. The latter method is usually used to continue the call. In the present invention, the wireless line designation signal of the subordinate base station wireless transceiver is changed from an audible sound signal to an intermittent DC signal,
The mobile radio exchange is equipped with a return signal sending function, and the line that carries calls from the mobile radio terminal side of the communication line between the mobile radio exchange and the base station radio transmitter/receiver is used to control the intermittent direct current. By transmitting the signal, the noise of the DC intermittent signal is prevented from having a negative effect on other devices or subscribers, etc., and the base station wireless transmitter/receiver side receives the DC intermittent signal and By having a function that can output radio line frequencies, it has become possible to construct extremely economical mobile radio equipment. Next, embodiments of the present invention will be described with reference to the drawings. In Figure 2,
The mobile radio exchange MTS operates in much the same way as known exchanges. The difference is that there are signals sent to the terminal mobile radio and radio channel designation signals sent to the base station radio transceiver. FIG. 4 shows an embodiment of the present invention, and is a circuit diagram showing only a portion of the apparatus shown in FIG. 2 that is particularly relevant to the present invention.

In Fig. 4, the bidirectional rank BW in the mobile radio exchange
T is connected to the base station wireless transceiver by a communication line,
The communication lines are separated from each other to connect the radio transmitter TX and the radio receiver RX. In this wireless communication system, before starting a call, all terminal mobile radios and one base station wireless transceiver B-TRX for each service area transmit radio waves for a control dedicated wireless line to initiate or receive a call. We are preparing for This is a measure sought to simplify control as much as possible. Next, when a call is received from the terminal mobile radio or an incoming call is received to the terminal mobile radio, a known exchange operation is performed based on the terminal mobile radio number, for example, by a method equivalent to information extraction by a translator. A wireless line number for a call is determined, and the wireless line number information is sent to both the terminal mobile radio and the base station wireless transceiver. Conventionally, an audible green signal was used for this signal, so an audible green signal receiver was also provided on the base station radio transmitter/receiver side, as in the conventional embodiment shown in Fig. 3. Line number information was being received. In the present invention, this radio line number information is sent to the base station radio transceiver by an intermittent DC signal, as shown in FIG. That is, the radio line number information specifying the radio line for telephone calls is sent via the base station radio transceiver B-TRX to an audible signal, such as an MF signal used in a normal exchange, a push button on a PB telephone, etc. A button signal and a pager selection paging signal are sent to the terminal mobile radio. This sending operation is no different from the signal transmission/reception system of known exchanges. This audible green signal sets the terminal mobile radio to a predetermined telephone radio line. The sending scheme is layer number sending device SDR-contact SO-
This is a transmitter TX. On the other hand, base station wireless transceiver B-TR
For X, radio line number information specifying the radio line for communication is sent as an intermittent DC signal, for example, a dial signal of a DP telephone. This sending operation is basically equivalent to the signal transmission/reception method in a known exchange. On the base station radio transceiver side, a base station control device B-CONT is provided to receive the DC intermittent signal, and radio line number information is obtained by counting the number of intermittent signals. This transmission/reception path is signal sending device SDR-contact Si-relay A
-Contact a-Counting circuit- [He is in the shape of a key saddle.

The reason why two separate paths are specifically used here is as follows.

First, a DC signal receiving circuit is cheaper than an audible signal receiving circuit. Second, intermittent DC signals tend to be a source of noise, so in order to avoid the effects of this as much as possible, we used a communication line from the base station radio receiver to the mobile radio exchange. That is, the communication line used just now is connected to the radio receiver RX, and it is impossible for the intermittent DC signal to become radio waves and be emitted to the outside. On the other hand, since the mobile radio communication equipment side is switched at the contact Si, there is no influence on the outside. Furthermore, when comparing an audible signal receiver and an intermittent signal receiving relay, it is clear that the relay is inexpensive and economical. At first glance, sending the same information to two routes using different signaling methods may seem like a waste of effort, but in reality it has made it possible to provide a very economical method. be. moreover,
The explanation of the embodiment shown in FIG. 4 will be supplemented. Bidirectional trunk BW
Contact b in T is a contact of relay B, not shown, which operates when both trunks are in use, and is for transmitting the operating status to the base station wireless transceiver B-TRX side. The base station radio transmitter/receiver B-TRX receives information on its operating state at the Sodenki B. Signal sending device SDR
The wireless line designation information from the base station control device B-CON
It is transmitted to relay A in T. The intermittent signal of relay A in B-CONT is counted by a public counting circuit COUNT, converted into radio line number information, and transmitted to radio transmitter TX "radio receiver RX" in base station radio transceiver B-TRX. The radio transmitter TX and radio receiver RX are fixed to the radio frequency corresponding to the designated radio line number during the period in which relay B is operating.When relay B is restored, Then, the setting of the wireless line number is also released.These operations can be realized extremely easily, reliably, and inexpensively by using known switching technology.One embodiment of the present invention has been described above, but the present invention According to the present invention, by configuring the wireless line number to be specified to the base station transceiver using an intermittent DC signal, it is possible to provide a very inexpensive and reliable wireless line specifying system.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the relationship between an exchange in a mobile radio device and its service area, FIG. 2 is a connection diagram common to the present invention, and FIG. The figure shows a circuit diagram related to conventional signal transmission and reception.
FIG. 4 is a circuit diagram of an embodiment of the present invention. MTS...Mobile radio switching system, OGT...
・Outgoing trunk, ICT... Incoming trunk, ML・
...Main link, M...Marker, SDR.
...Signal transmission device, BWT...Bidirectional trunk, B-TRX...Base station transceiver, B-CO
NT...Base station controller, S-TRX...
...Terminal mobile radio, TX... Radio transmitter, RX... Radio receiver, REC...
Signal receiver, CONT...Control device, COUNT
T... Counting circuit. Connected Hair 3 Figure 2 Figure 4

Claims (1)

[Claims] 1 comprising a mobile radio converter, at least one base station radio transceiver, and a plurality of terminal mobile radios, each of the plurality of terminal mobile radios having at least one communication radio line and the plurality of terminal mobile radios. The base station wireless transmitter/receiver has a control dedicated wireless line commonly used by the exchange, and the base station wireless transmitter/receiver has a transmitting/receiving means for any one of the plurality of wireless communication lines specified by the wireless line number information from the exchange. and a line between the mobile radio exchange and the base station radio transceiver that carries calls from the mobile radio exchange side to the terminal mobile radio side, and a line that carries calls from the terminal mobile radio side to the mobile radio exchange side. In a mobile radio system provided with a communication line constituted by a separate line from the line,
The mobile radio exchange transmits the radio line number information for designating a radio line for telephone calls from the mobile radio exchange to the base station radio transceiver as a DC intermittent signal generated by DC pulse sending means provided on the mobile radio exchange side. Transmits the call from the device side to the mobile radio exchange side via the line to the DC pulse reception counting means provided on the base station radio transceiver side, and designates the radio line for the call to be used by the base station radio transceiver. A wireless line specification method characterized by: