JPH024031A - Radio relay station - Google Patents

Abstract

PURPOSE:To effectively utilize the channel of a radio relay station by, when slave stations to execute a mutual call are the slave stations to which a self- station executes a relay action, processing the mutual call with an exchange in the self-station. CONSTITUTION:A radio relay station 402 decides the coincidence and non- coincidence of a pair of mutual subscriber numbers in two incoming control channels at the time of radio-relaying the signal of the incoming control channels radio-transmitted by slave stations 404 and 405 relay-operated by the self-station to a master station 401, and as a result, when the pair of subscriber numbers to coincide are the subscriber numbers of a subscriber terminals to belong to two different slave stations, the radio relay station 402 informs the master station 401 of the pair of subscriber numbers. After a confirmation response from the master station 401 to the information is received, the mutual call between the subscriber terminals of the pair of subscriber numbers is executed with the exchange in the self-station, and simultaneously, the channel set between the master station 401 and them is released.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a wireless relay station in a multiple access wireless communication system, and in particular to communication between two slave stations located downstream of the same wireless relay station. The present invention relates to the control method of the wireless relay station when the wireless relay station is used.

(Prior Art) As is well known, there are various multiple access methods such as time division method and frequency division method. For example, as shown in FIG. 5, such a multiple access wireless communication system includes a master station 401 connected by wire to an exchange not shown, and one or many wireless relay stations (hereinafter simply referred to as "relay station J"). 402 and master station 4
One or more slave stations 40 directly wirelessly connected to 01
3, and a plurality of slave stations (404, 405, . . . ) that are wirelessly connected to the master station 401 via a relay station 402, and each slave station has a subscriber terminal (a,
b, c) accommodate a plurality of subscriber lines to which they are respectively connected.

In this type of wireless communication system, the master station 401 is at the center of the system and performs line connection control, billing management, etc. For example, the subscriber terminal of the slave station 404 and the subscriber terminal of the slave station 405 Even when C makes a call, the slave station 40
4-Relay station 402-Master station 401-Relay station 402-Slave station 4
A wireless line named 05 is formed. The relay station 402 only performs a relay connection operation between the upstream master station 401 and the downstream slave stations 404 and 405, and also connects the master station 401 and the slave stations 403.
If there is a free communication channel between the two stations, a wireless line is set up directly without going through the relay station 402.

(Problem to be Solved by the Invention) However, in the above example, the master station 401 and the slave station 40
If there is no free communication channel between 3 and 3, a call originating from subscriber terminal a of slave station 403 or an incoming call to subscriber terminal a from the exchange side, for example, will be forced to wait. In this case, since subscriber terminal C belongs to two slave stations (404, 405) relayed by the same relay station 402, mutual calls between slave stations 404 and 405 are carried out by the relay station. 402
If this can be processed through local exchange, the slave station 403 can use the communication channel that was used between the relay station 402 and the master station 401, which makes effective use of the communication channel and is very convenient for system operation. be. In addition, the relay station 402
Since there is no need to wirelessly transmit the information to the master station 401, it is possible to improve the efficiency of power usage.

The present invention has been developed in view of these problems, and its purpose is to transfer the mutual calls to the local station when the slave stations are communicating with each other and the slave stations are relaying operations. It is an object of the present invention to provide a wireless relay station that can perform processing through exchange and thereby make effective use of communication channels.

(Means for Solving the Problems) In order to achieve the above object, the wireless relay station of the present invention has the following configuration.

That is, the wireless relay station of the present invention includes at least a parent station, one or a plurality of wireless relay stations, and a plurality of slave stations wirelessly connected to the master station via the wireless relay station. When subscriber terminals belonging to each of the slave stations are making a mutual call via wireless line, each of the slave stations will add its own number to the subscriber terminals that are making the mutual call. In a multiple access wireless communication system in which a subscriber number (hereinafter referred to as a "subscriber number pair") and a communication channel number in use are wirelessly transmitted to a master station over an uplink control channel; means for determining whether or not the subscriber number pairs in two uplink control channels match each other when wirelessly relaying a signal on the uplink control channel wirelessly transmitted by each slave station whose own station performs a relay operation to a master station; and; means for notifying the parent station of the subscriber number pair when the pair of subscriber numbers that match as a result of the determination are the subscriber numbers of subscriber terminals belonging to two different slave stations; means for performing mutual communication between the subscriber terminals of the subscriber number pair through local exchange after receiving an acknowledgment response; and a communication channel used in the local exchange within the period of the local exchange operation. The invention is characterized by comprising: means for stopping the relay operation; and;

(Function) Next, the function of the wireless relay station of the present invention configured as described above will be explained.

In the multiple access wireless communication system to which the present invention is directed, when subscriber terminals belonging to a certain slave station A and another slave station B are communicating with each other via a wireless line, the slave station A
and B control uplinks of the subscriber numbers of both subscriber terminals (hereinafter referred to as "subscriber number pair") and the call channel numbers in use, in addition to their own numbers. This is a system that transmits wirelessly to a master station using a channel.

In such a multiple access wireless communication system, the wireless relay station of the present invention transmits two signals when wirelessly relaying the uplink control channel signal transmitted by each slave station that performs a relay operation to the master station. A match or mismatch between the subscriber number pairs in the uplink control channel is determined, and as a result of the determination - if the matched subscriber number pairs are the subscriber numbers of subscriber terminals belonging to two different slave stations, the subscriber numbers; Notify the parent station of the pair. After receiving the confirmation and response from the master station in response to the notification, the subscriber terminals of the subscriber number pair perform mutual communication using their own exchange, and within the period of said own exchange operation, the subscriber terminals of the subscriber number pair communicate with each other through their own exchange. Stop the relay operation of the call channel in use.

As a result, mutual calls between slave stations for which the own station is acting as a relay will be looped back at the radio relay station instead of being looped back at the master station, and the communication channel that was set between the master station and the wireless relay station will be It can be used by other stations. At this time, even if the master station uses the empty communication channel to send a message to the wireless relay station, the wireless relay station will not relay it downstream, so the slave stations involved in the internal exchange will (In other words, mutual communication between subscriber terminals) is not hindered.

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

FIG. 1 shows a wireless relay station (relay station) according to an embodiment of the present invention.
In FIG. 1, which shows the configuration of the main station, 101 is an antenna duplexer on the main station side, 102 is a receiver, 103 is a reproduction circuit, and 10
4 is a relay circuit, 105 is a synchronization signal detection circuit for detecting a synchronization signal from the master station, 106 is a timing generation circuit, and 10
7 is a reception control circuit, 108 is a relay station control circuit,
109 is the input from the relay port f\8104 and the memory circuit 11
a selector circuit for selecting one of the inputs from 7; 11;
O is a transmitter, 111 is an antenna duplexer on the slave station side, 112
is a receiver, 113 is a reproduction circuit, 114 is a relay circuit, 11
5 is a synchronization signal detection circuit for detecting a synchronization signal from a slave station;
116 is a reception control circuit, 117 is a storage circuit, 118 is a transmission control circuit, 119 is an AND circuit for determining whether or not to transmit the output from the relay circuit 114, and 120 is a transmitter.

Next, the wireless communication system according to this embodiment is based on a time division multiple access method. Therefore, the frame structure in a time division multiplexed radio channel is, for example, as shown in FIG.
It consists of (n+1) time slots, one of which is used as a control channel (CHo), and the remaining n channels are used as communication channels (CH, to CHn).

In other words, FIG. 5 is an example of the configuration of a time division multiplex wireless communication system. Then, for mutual communication between the subscriber terminal of the slave station 404 and the subscriber terminal C of the slave station 405, the relay station 402 according to the present invention shifts to an intra-station switching operation as follows.

First, the downlink control channel signal from the master station 401 is sent to the antenna duplexer 101, receiver 102, and regeneration circuit 1.
03, it reaches one input terminal of the selector circuit 109 via the relay circuit 104, and the synchronization signal detection circuit 105 receives the branch output of the regeneration circuit 103, detects the synchronization signal, and transmits it to the timing generation circuit 106 and reception control. circuit 107
Output to. The timing generation circuit 106 generates various timing signals such as a timing signal for downlink transmission and a timing signal for uplink transmission, and transmits them to the relay circuit 104 and the storage circuit 1.
Supply to 17th mag. Further, the relay station control circuit 108 which has received an instruction from the reception control circuit 107 issues a signal to the selector circuit 109 to select the output of the relay circuit 104. As a result, the downlink control channel signal is sent out from the relay circuit 104 in accordance with the downlink transmission timing signal, and wirelessly transmitted to the downstream slave station via the selector circuit 109, transmitter 110, and antenna duplexer 111. This allows each downstream slave station to obtain the time reference for each channel of the frame and generate a predetermined timing signal.

Now, slave station 404 - relay station 402 - master station 401 - relay station 4
Assume that a wireless line consisting of two communication channels is set up in the route of the 02-slave station 405, and the subscriber terminals 1 and 405 start mutual communication. At this stage, the relay station 402 merely makes a relay connection between the master station 401 and the slave stations (404, 405); j [Execute (1) to (2).

In FIG. 4, in step (1), the called subscriber terminal C outputs its own subscriber number M to the subscriber line interface circuit of the slave station 405 as a control signal related to the call signal. As a result, the subscriber number M is changed from slave station 405 to relay station 40.
2→master station 401→relay station 402→slave station 404, and is included in a speech signal in a speech channel (for example, CH) and transmitted to the subscriber terminal.

Similarly, in step (2), the called subscriber terminal outputs its own subscriber number N to the subscriber line interface circuit of slave station 404 as a control signal related to the call signal.

As a result, the subscriber number N is changed from slave station 404 to relay station 402 to
It is included in a call signal in a call channel (for example, CH2) along the route of master station 401 → relay station 402 → slave station 405 and is transmitted to subscriber terminal C.

In this way, the subscriber terminal C and the subscriber terminal C notify each other of their subscriber numbers. Note that the above operation can also be performed by obtaining the relevant subscriber number by, for example, searching for subscriber interface circuits in use on the slave station side.

Next, in step (3), the slave station 405 receives the subscriber number M sent from the called subscriber terminal C or obtained through its own search, the same number N, the communication channel number CH, and its own station. The identification number R is inserted into the corresponding area of the uplink control channel shown in FIG. 3(a) and wirelessly transmitted.

Then, the relay station 402 transmits the uplink control channel signal to the master station 40 via the route of the antenna duplexer 111, receiver 112, regeneration circuit 113, relay circuit 114, AND circuit 119, transmitter 120, and antenna duplexer 101.
At the same time, this signal is relayed to the reproducing circuit 113.
The signal is branched and output from the synchronization signal detection circuit 115. The synchronization signal detection circuit 115 detects a synchronization signal from the synchronization signal area to obtain a time reference, and outputs an input signal to the reception control circuit 116 based on this. The reception control circuit 116 takes in the identification number R of the slave station 405 from the slave station number area, the subscriber numbers M and N from the two subscriber number areas, and the call channel number CH from the call channel number area. These are sent to relay station control circuit 108.

Similarly, in step (4), the slave station 404 receives the subscriber number N and M sent from the calling subscriber terminal or obtained by searching for it, the communication channel number CH2, and the local station. The identification number S is inserted into the corresponding area of the uplink control channel shown in FIG. 3(a) and wirelessly transmitted.

Similarly, the relay station 402 relays this uplink control channel signal to the master station, and also transmits the identification number R and subscriber number N of the slave station 405, and the communication channel number CH and the identification number R of the slave station 405. It is taken into the control circuit 108.

Then, in the relay station control circuit 108, the input subscriber number pair (M, N) matches the subscriber number pair (N, M), and the identification numbers R and S identify the slave station located downstream of the relay station 402. 405 and 404, it is known that the subscriber terminals belonging to the two slave stations for which the local station performs relay operations are communicating with each other via the local station. Then, a command is issued to the transmission control circuit 118 to insert the own relay station number and subscriber numbers M and N into the corresponding area of the control channel shown in FIG. 3(b), and to transmit them to the master station 401. The above is the movement of hand I'@(5).

Next, in step (6), the master station 401 sends the subscriber number pair (
M, N), the exchange not shown in the figure takes action to keep the subscriber terminals associated with the subscriber number M and the same N in the talking state, and sends an acknowledgment response to the notification (in-house exchange) to the relay station 402. The permission signal (FIG. 3(b)), which is the same as the notification signal from relay station 402, is sent to relay station 402 as a permission signal.

In this way, relay station 402, which has received permission for intra-office exchange, performs the following operations to execute intra-office exchange.

■: Relay station control circuit 108 is AND circuit 119
is set to a prohibited state, and the relay transmission of the communication signals of the communication channels CHI and CH2 that are being used by the subscriber terminal C is stopped.

■The call signals of the two call channels CH1 and CH2 are regenerated by the regeneration circuit 113 and input to the reception control circuit 116 via the synchronization signal detection circuit 115.
16 writes and stores the call signal data in a storage circuit 117.

■: The memory content of the memory circuit 117 is the timing generation circuit 1
The signal is read out in accordance with the lower station transmission timing signal generated in step 06 and sent to the other input of the selector circuit 109. At this time, the relay station control circuit 108 transmits the call signal received on the call channel CH.
In step 2, the reading control of the memory circuit 117 is performed so that the communication signals received on the communication channel CH2 are respectively transmitted on the communication channel CH.

■: Relay station control circuit 108 is selector circuit 10
9 to select the output of the memory circuit 117. As a result, the communication signals of the communication channels CH, , CH, sent from the storage circuit 117 are transmitted to the radio line for the slave station via the transmitter 110 and the antenna duplexer 111.

In this way, the relay station 402 processes mutual calls between the subscriber terminal and the same C using its own internal exchange.
Then, the selector circuit 109 selects the communication channel CHI within the period of this intra-office exchange.

Since the selection control is performed at the time position of the same CH, even if a signal is transmitted from the master station 401 on the communication channel CH and the same CH2, the signal is not interrupted to the downstream side. Mutual calls related to this will be carried out without any problems.

Note that, as can be inferred from the above explanation, it is conceivable that subscriber terminals belonging to the same slave station communicate with each other. In this case, the slave station only needs to perform internal exchange.
Through steps (1) to (4) above, the slave station confirms that the subscriber numbers match. 1) to (4) can utilize this technique.

(Effects of the Invention) As explained above, according to the wireless relay station of the present invention, mutual calls between slave stations for which the own station performs relay operations can be processed by internal exchange of the wireless relay station. Therefore, the communication channel set between the master station and the wireless relay station can be used by other stations, and the communication channel can be used effectively.

Furthermore, since the wireless relay station can stop the transmission function to the master station during its own exchange, there is an effect that the power source can be used economically.

[Brief explanation of the drawing]

Figure 1 is a configuration block diagram of a wireless relay station according to an embodiment of the present invention, Figure 2 is a configuration example of a transmission frame, Figure 3 is a configuration example of a control channel, and Figure 4 is a relay station that performs internal exchange. FIG. 5 is a block diagram showing the configuration of a multiple access wireless communication system. 101... Antenna duplexer, 102...
...Receiver, 103...Regeneration circuit, 10
4... Relay circuit, 105... Synchronization signal detection circuit, 106... Timing generation circuit, 107... Reception control circuit, 108...
...Relay station control circuit, 109...
Selector circuit, 110...Transmitter, 111.
... Antenna duplexer, 112 ... Receiver, 113 ... Regeneration circuit, 114 ...
...Relay circuit, 115...Synchronization signal detection circuit,
116...Reception control circuit, 117...
...Storage circuit, 118...Transmission control circuit,
119...and (AND) 4 roads, 120.
...Transmitter, 401 ... Master station, 402
...Relay station, 403,404.405...
...Slave station, a, b, c...Subscriber terminal. Agent Patent Attorney Yoshihiro Hachiman, mark 5I + month 69ri ;; (j pisu'ν [λtsu (sun super λb) ty + λ4m'i 夛l investigation / Figure I Yunkitsune phrase A/l Tachibana ゛ graduation 2 Kill 0 Accomplishment Example School to Flash Kotroll, 3 Figures

Claims (1)

[Claims] A subscriber terminal consisting of at least a master station, one or a number of wireless relay stations, and a plurality of slave stations wirelessly connected to the master station via the wireless relay station, and belonging to each of one slave station and another slave station. When two sub-stations are making a mutual call via a wireless line, each of the two sub-stations uses the subscriber number (hereinafter referred to as the "subscriber number pair") of both subscriber terminals making the mutual call in addition to their own number. In a multiple access wireless communication system, the wireless relay station wirelessly transmits the call channel number ( ) and the call channel number in use to a master station on an uplink control channel; means for determining whether or not the subscriber number pairs match each other in two uplink control channels when wirelessly relaying a signal on the uplink control channel transmitted by a slave station to a master station; and a subscriber whose number matches as a result of the determination. means for notifying a master station of the subscriber number pair when the number pair is a subscriber number of a subscriber terminal belonging to two different slave stations; means for performing mutual communication between the subscriber terminals using the local exchange; and means for stopping the relay operation of the communication channel used in the local exchange during the period of the local exchange operation. A wireless relay station characterized by: