JPH01830A - wireless relay system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wireless relay system in the field of time division multiplex multiple access communication, and more particularly to a wireless relay system that increases the transmission efficiency of communication data.

(Prior Art) Conventionally, in a wireless relay system in which communication between a base station and slave stations scattered outside the service zone of this base station is performed via relay stations, time-divided channels (hereinafter referred to as
(referred to as a time slot), and the signal configuration of one time slot includes a signal indicating whether there is communication data other than communication data (communication data presence/no signal),
Efficient communication is achieved by relaying signals only for time slots in which the relay station detects communication data as "presence." Hereinafter, the prior art will be described in detail with reference to the drawings. FIG. 6 illustrates a system configuration diagram of a time division multiplex multiple access communication system, where 1 is a base station, 2.2'
, 4.4' are relay stations, and 3.5 is a slave station. Communication between base station 1 and slave station 3 existing outside the service zone of base station 1 is performed via relay station 2 and relay station 2', and communication between base station 1 and slave station 5 is performed through relay station 2'. 4 and 4' are relayed. Conventionally, the time slot signal configuration used in this system is generally as shown in FIG. That is, the preamble 10 for communication synchronization
1. Start code 102 with/without communication data signal
and communication data 103. Each relay station has means shown in the configuration diagram of the relay station in FIG. 7 to detect this start code 102 and control the relay. Reference numeral 6 designates downlink relay means J7 represents uplink relay means, reference numerals 8 and 8' represent start code detection means, and reference numerals 9 and 9' represent relay control means.

For example, when the relay station 2 or 2' detects the start code 102 by the start code detection means 8 or 8', the signal sent from the base station 1 is transmitted to the relay control means 9.
The signal sent from the slave station 3 is transmitted to the base station 1 by controlling the downstream relay means 6 by the relay control means 9', and sent to the base station 1 by the relay control means 9'.
The signal is relayed only for the time slot in which it is detected.

In this way, if the relay station 2 or 4 does not receive the communication data 103 from the slave station side, that is, if the start code 102 is not detected, the relay station 2 or 4 is controlled not to perform the relay operation. The base station 4 can perform time division multiple access communication with the base station 1 on the same radio frequency.

In addition, as a method of determining the presence/fi of communication data, a squelch signal indicating that the received electric field is above a specified value may be used without using a start code.
This method has the problem that when a signal arrives at the relay station from another zone due to radio frequency overreach, etc., the relay station performs a relay operation if the arriving signal is at or above the squelch level. A method is used to determine the presence/absence of communication data using a start code.
There is.

As described above, in the prior art, by transmitting a start code and controlling the relay operation only for the time slot in which the start code exists, radio frequencies can be used effectively and communication can be performed efficiently.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional technology, in order to determine the presence/absence of communication data at the relay station, a start code is sent each time communication data is sent to the base station and the slave station. Since the time slot signal structure is such that the transmission efficiency of communication data decreases, there is a problem.

An object of the present invention is to provide a time-division multiplex communication line between a base station and a slave station with control time slots I~ and communication time slots h, and use the control time slots to solve the problems of the prior art described above. The relay station that receives the control time slot signal from the slave station relays the assigned communication time slot signal and performs communication as the communication time slot signal configuration. This paper attempts to propose a wireless relay system that improves the transmission efficiency of communication data by transmitting only data.

(Means for solving the problems) In order to achieve the above object, the present invention has the following means configuration. That is, the wireless relay system of the present invention includes one base station, one or more slave stations, and one or more relay stations that relay communication signals between the base station and the slave stations. In a division multiplex multiple access communication system;
The communication line between the base station, the relay station, and the slave station has a required number of communication time slots used for transmitting and receiving predetermined communication data, and a communication time slot to be used from among the required number of communication time slots. a required number of control time slots used for transmitting and receiving a predetermined side control signal including information for allocating and specifying available communication time slots to the relay station and the slave station; for,
a first control time slot signal transmitting/receiving means for transmitting/receiving a signal of the control time slot; a first communication time slot signal transmitting/receiving means for transmitting/receiving a signal of the assigned communication time slot; Allocating and setting possible communication time slots, canceling the allocated communication time slots at the end of communication, and transmitting information regarding the allocation setting and cancellation to the first control time slot signal transmitting/receiving means and the first communication communication time slot setting/cancellation means for outputting a communication time slot signal to the communication time slot signal transmission/reception means; the relay station includes downlink relay means for relaying a signal from the base station side to the slave station side; uplink relay means for relaying a signal from the station side to the base station side; control time slot signal detection means for detecting the control time slot signal from the slave station side; communication time slot setting/cancellation signal detection means for detecting communication time slot allocation information and release information included in a control time slot signal; the control time slot signal detection means; and the communication time slot. Based on the signal detection results of the setting/cancellation signal detection means, the communication time slot is set to be assigned so that the control time slot signal is relayed without restriction to the control time slot. Relay control means for relaying control of the uplink relay means so as to relay only the signal of the assigned communication time slot, and to stop relaying of the signal of the assigned communication time slot at the end of the communication. The slave station is equipped with: a second control time spot +- signal transmitting/receiving means for transmitting and receiving signals of the control time slot; and a second control time slot for transmitting and receiving signals of the allocated communication time slot. A wireless relay system comprising: a communication time slot signal transmitting/receiving means.

(Function) The wireless relay system of the present invention includes one base station, one or more slave stations, and one or more relay stations that relay communication signals between the base station and the slave stations. Used in a division multiplex multiple access communication system, the communication line between the base station, relay station, and slave station has the required number of communication time slots used to send and receive predetermined communication data, and the required number of communication time slots used for transmitting and receiving predetermined communication data. A required number of control time slots used for transmitting and receiving predetermined control signals including information for allocating and specifying available communication time slots from among the time slots to relay stations and slave stations. ing.

When an incoming call signal is generated at the base station, the communication time slot setting/cancellation means sets the allocation of available communication time slots, and the communication time slot setting signal becomes the first control time slot. The signal is input to the signal transmitting/receiving means and the first communication time slot signal transmitting/receiving means.

The first control time slot signal transmitting/receiving means sends a predetermined control signal including a communication time slot setting signal to the slave station using the control time slot. Also, the first
The communication time slot signal transmitting/receiving means enables transmission and reception of communication data in the communication time slot assigned by the communication time slot setting signal. When the relay station receives the control time slot signal from the base station side, it performs a relay operation by the downlink relay means, sends the control time slot signal to the slave station, and sends the communication time slot setting/cancellation signal. The detection means detects the communication time slot setting signal included in the control signal of the control time slot. When the slave station receives the control time slot signal, the second control time slot transmission/reception means controls the slave station. detects the communication time slot signal, extracts the communication time slot setting signal, and outputs it to the second communication time slot signal transmitting/receiving means. The second communication time slot signal transmitting/receiving means makes it possible to transmit and receive communication data using the communication time slot assigned by the communication time slot setting signal. Further, when the second control time slot signal transmitting/receiving means detects a control signal from the base station side,
A predetermined control signal including a response signal indicating a response to an incoming call signal from the base station is sent to the base station using the control time slot.

In the relay station, when the control time slot signal detection means detects the control time slot signal from the slave station, the relay control means detects the control time slot signal based on the detection result of the control time slot signal. controls the uplink relay means to relay the signal of the control tie 14 slot without restriction, and relays the signal of the control time slot to the base station side. In addition, the relay control means uses the detection result of the control time slot signal by the control time slot signal detection means and the communication time slot ■・setting/
Based on the detection result of the communication time slot setting signal by the release signal detection means, the uplink relay means is configured to relay only the signal of the allocated communication time slot for the communication time slot. Control.

When the base station detects the control time slot signal from the slave station side by the first control time slot signal transmitting/receiving means, the first communication time slot signal transmitting/receiving means of the base station and the slave station Communication data is transmitted and received by the second communication time slot signal transmitting/receiving means of the station using the assigned communication time slots. At the end of communication, the communication time slot setting/cancellation means in the base station performs release control of the communication time slot that has already been allocated, and the allocation setting in the first communication time slot signal transmission/reception means is performed. The signal transmission/reception operation of the communication time slot stopped. Also, the first
The control time slot signal transmitting/receiving means sends a predetermined control signal including a communication time slot release signal to the slave station using the control time slot. At the relay station, when the communication time slot setting/cancellation signal detection means detects the communication time slot release signal, the relay control means performs uplink relaying to stop the relay operation for the communication time slots that have already been allocated. Control the means. In the slave station, when the second control time slot signal transmitting/receiving means receives the control time slot signal from the base station side and detects the communication time slot release signal, the second communication time slot signal transmitting/receiving means The signal transmission and reception operation of the allocated communication time slot stops.

In the wireless relay system of the present invention, due to the above-described effects, only predetermined communication data can be transmitted and received between the base station, the relay station, and the slave stations using the assigned communication time slots. It becomes possible to improve data transmission efficiency.

(Example) Next, an example of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a wireless relay system according to an embodiment of the present invention, in which 1 is a base station, 2.4 is a relay station, 3.5 is a slave station, 1
1 is a first control time slot signal transmitting/receiving means; 12 is a first communication time slot signal transmitting/receiving means; 13 is a communication time slot setting/cancellation means; 21 is a down relay means; 22 is an up relay means; Control time slot signal detection means; 24, communication time slot 1 setting/cancellation signal detection means; 25, relay control means; 31, second control time slot signal transmission/reception means; 32, second communication time slot It is a means of sending and receiving.

Relay station 4 has the same means and configuration as relay station 2, and slave station 5 has the same means and configuration as slave station 3.

Communication between base station 1 and slave stations 3 and 5 is carried out by relay station 2.
and 4, and as shown in the frame structure diagram of the communication signal in Figure 2, time slot O, time slot 1, ... time slot N (N is a positive number of 2 or more). This is performed using a time division multiplex multiple access communication method in which data is transmitted and received in each time slot divided into a plurality of time slots (an integer).

In the embodiment of the present invention, time slot number 0 is used as a control time slot, and time slot number 1 to time slot N? The N time slots are used as communication time slots. FIG. 3 is a time slot signal configuration diagram of an embodiment of the present invention, in which (1) is a time slot signal configuration for controlling base station transmission, (2) is a time slot signal configuration for controlling slave station transmission, and (3) is a time slot signal configuration for controlling base station transmission. ) indicates the communication time slot signal configuration. Control time slot signals transmitted by the base station include a synchronization code 104, a control code (A) 105. It consists of a time slot number code 106 and an identification code 107. Also, control code (A) 105. The time slot number code 106 and the identification code 107 constitute a control signal (A) 108. The control time slot signal for slave station transmission is Star! -Code 102. It consists of a control code (B) 109 and an identification code 107.
) 109 and identification code 107 to control signal (B)
110. The communication time slot signal consists only of communication data 103, and the preamble 101 and start code 102 shown in the conventional time slot signal configuration diagram in FIG. 8 are not included in the communication time slot signal. In the present invention, the demodulator of the receiver uses a delayed detection method for receiving signals in the upstream direction, and uses a synchronous detection method for receiving signals in the downstream direction, so the preamble 101 is not required. Also, since the communication data 103 is transmitted and received using the assigned communication time slot, the start code 102 is not necessary.

Next, the operation of the embodiment of the present invention will be explained with reference to FIGS. 1 and 3. When the base station 1 calls the slave station 3 for communication, the base station 1 sends an incoming call signal to the slave station 3 using a control time slot.

At this time, regarding the control signal (A) 108 of the control time slot signal sent from the base station 1 to the slave station 3, the control code (A>105 is the incoming call code, and the time slot number code 106 is the allocation setting The code indicates the communication time slot number, and the identification code is 107.
is a code indicating the individual number assigned to the slave station 3.

That is, the communication time slot setting/cancellation means 13 of the base station 1 allocates and sets available communication time slots from time slots 1 to N.
For example, time slot No. l-1 is assigned), and the first communication time slot signal transmitting/receiving means 12 can transmit and receive the signal of communication time slot No. 1. Further, the first control time slot signal transmitting/receiving means 11 transmits the synchronization code 104 as a frame synchronization signal and the control signal (A) 108 using the control time slot. In the relay station 2, the synchronization code 104 and the control signal (A) 108 sent out by the base station 1 are relay-processed by the downlink relay means 21, and relayed to the slave station 3. Further, the control code (A) 105 and the time slot number code 106 are detected by the communication time slot 1 to setting/cancellation signal detection means 24 to obtain the communication time slot setting signal. The slave station 3 detects the control time slot signal transmitted from the base station 1 by the second control time slot signal transmitting/receiving means 31, and the communication time slot allocated and set by the time slot number code 106 is the time slot 1.
Therefore, the second communication time slot signal transmitting/receiving means 32 can transmit and receive the signal of communication time slot No. 1. The slave station 3 sends a response signal to the incoming call signal from the base station 1 to the base station 1 using the control time slot; The signal is start code 1
02 and a control signal (B) 110. Control code (B) 1 configuring control signal (B) 110
09 is a response code corresponding to the incoming call code, and identification code 107 is a code indicating the individual number of the slave station 3.

The relay station 2 detects the start code 102 of the control time slot signal sent by the slave station 3 using the control time slot signal detection means 23, and
Based on the detection result, the relay control means 25 controls the uplink relay means 22, and the signal of the control time slot from the slave station 3 is relayed by the uplink relay means 22 without restriction, and relayed to the base station 1. . Furthermore, the detection result of the start code 102 by the control time slot signal detection means 23 and the communication time slot setting/cancellation signal detection means 2
4, the uplink relay means 22 is controlled by the relay control means 25 based on the communication time slot l' and the detection result of the K constant signal.
, and enables the signal of communication time slot No. 1 to be relayed by the uplink relay means 22. The base station 1 receives the control code (B) 109 (i.e.,
When the response code) is detected, the first communication time slot signal transmitting/receiving means 12 of the base station 1 and the second communication time slot signal transmitting/receiving means 32 of the slave station 3 transmit the communication time slot No. 1. It is used to send and receive communication data. At the end of communication, the base station 1 cancels the setting of the communication time slot No. 1 that has already been allocated by the communication time slot setting/cancellation means 13, and
The transmission/reception operation of the signal of the communication time slot No. 1 in the communication time slot signal transmission/reception means 12 is stopped. Further, the control code (A) 105 becomes a release code by the first control time slot signal transmitting/receiving means 11, and the time slot number code 106 indicates the communication time slot number (i.e., time slot number 1) to be released. The control signal (A) 108, which has become a code, is sent to the slave station 3 using the control time slot. The relay station 2 relays the control time slot signal from the base station 1 using the downlink relay means 21 and relays the signal to the slave station 3 . Furthermore, the control code (A) 105 (that is, the release code) is detected by the communication time slot setting/release signal detection means 24.
and detects the time slot number code 106 to obtain a communication time slot release signal. Based on the communication time slot cancellation signal, the relay control means 25 controls the uplink relay means 22 to stop the relay processing operation of the already set communication time slot No. 1.

The slave station 3 includes a second control time slot signal transmitting/receiving means 3
Control code (A) 1 which is a release code by 1
05 and timeslot number code 106;
The transmission/reception operation of the signal of communication time slot No. 1 in the second communication time slot signal transmission/reception means 32 is stopped. With the above, communication between the base station 1 and the slave station 3 is completed.

Also, when the slave station 3 makes a call and communicates with the base station 1,
First, the slave station 3 sends a calling signal to the base station 1 using a control time slot. At this time, the control signal (B)
Control code (B) 109 of 110 is a calling code.

When the base station 1 receives the control signal (B) 110 from the slave station 3, the base station 1 allocates and sets an available communication time slot (for example, sets time slot No. 1), and the control code (A) 105 is set. Using the control time slot, the control signal (A) 108 becomes the response code corresponding to the calling signal from the slave station 3, and the time slot number code 106 becomes the code indicating communication time slot No. 1. Child station 3
Send to. Thereafter, by the same operation as described above, base station 1
Communication between the slave station 3 and the slave station 3 is performed via the relay station 2.

Next, details of the operations of the base station and relay station will be explained.

FIG. 4 is a block diagram of a base station according to an embodiment of the present invention, in which 11 is a first control time slot signal transmitting/receiving means, 11-1 is a synchronization code generation circuit, and 11-2 is a control signal (A> generation circuit). 11-3 is a control signal (B) detection circuit, 12 is a first communication time slot signal transmitting/receiving means,] 2-1 is a time thrower No. 81 code decoding circuit, . . . 12-N is a time slot N 13 is a communication time slot setting/cancelling means; 13-1 is a communication time slot setting circuit; 13-2 is a communication time slot to cancellation circuit; 14 is a transmitter/receiver; and 15 is an antenna. FIG. 5 is a configuration diagram of a relay station according to an embodiment of the present invention, in which 21 is a downlink relay means, 21-1 is a receiver, 21-2 is a regeneration circuit, 21-3 is a transmitter, 22 is an uplink relay means, 22-1 is a receiver, 22
-2 is a reproduction circuit, 22-3 is a transmitter, 23 is a control time slot signal detection means, 24 is a communication time slot setting/cancellation signal detection means, 24-1 is a communication time slot setting signal detection circuit, 24 -2 is a communication time slot release signal detection circuit, 24-3 is a Sugeruchi determination circuit, 2
5 is a relay control means, 25-1 is a relay time slot setting circuit, 25-2 is a relay operation control circuit, 26 is a base station side antenna, 27 is a base station side duplexer, 28 is a slave station side duplexer, 2
One is the antenna on the slave station side.

At the base station, a synchronization code 104 is generated by a synchronization code generation circuit 11-1, and this frame synchronization signal is modulated by a transceiver 14 and sent from an antenna 15 to the slave station at regular intervals.

After the synchronization code 104, a control signal (A) 1.08 is sent to the slave station side, but the control code (A) 105. The time slot number code 106 and the identification code 107 are the control signals (A>
Generated by the generation circuit 11-2, the control signal (A) 108
is transmitted to the slave station via the transceiver 14 and the antenna 15. That is, when an incoming call signal is sent, the communication time slot setting circuit 13-1 selects and allocates an available communication time slot from the communication time slots, and for example, the selected communication time If the slot is the No. 1 time slot, information that the allocated communication time slot is the No. 1 time slot is output to the control signal (A) generation circuit 11-2, and a control code (A>105 A control signal (A>108) is generated in which is the incoming call code, the time slot number code 106 is the code for the first time slot, and the identification code 107 is the individual number code of the slave station to be communicated with.

Further, based on the information from the communication time slot setting circuit 13-1 that the assigned communication time slot is time slot No. 1, the time thrower 81 code decoding circuit 12-1 can transmit and receive the communication data 103. becomes. The control time slot signal sent from the base station is relayed through the relay station and received by the slave station, but at the relay station, the control time slot signal is sent to the base station side antenna 26, the base station side common use device 27, receiving fi 21-1,
Reproduction circuit 21-2, transmitter 21-3, slave station duplexer 28
, and is sent to the slave station via two antennas on the slave station side. At the same time, communication time slot setting signal detection circuit 2
At step 4-1, the incoming call code of control code (A) 105 and the code of communication time slot No. 1 to which time slot number code 106 has been assigned are detected, and information for relaying communication time slot No. 1 is detected. It is output to the relay time slot setting circuit 25-1.

When the slave station receives the incoming call signal, the slave station sends a response signal to the base station, but the control time of the control signal (B) 110 with control code (B) 09 as the response code. A slot signal is sent to the base station. When the relay/station receives the control time slot signal via the path of the slave station side antenna 29, slave station duplexer 28, and receiver 22-1, the start code 102 is detected by the control time slot signal detection means 23. be done. Upon detection of the start code 102, the relay operation control circuit 25-2 controls the regeneration circuit 22-2, relays all received control time slot signals without restriction, and transmits the signals to the transmission fi 22-3 and the base station duplexer. 2
7. Send to the base station side via the route of the base station side antenna 26. Further, information on the detection result of the start code 102 by the control time slot signal detection means 23 is input to the relay time slot setting circuit 25-1, and it is determined that the control time slot signal has been received from the slave station 1111.
Information about communication time slot No. 1 assigned and set by the communication time slot setting signal from the communication time slot setting signal detection circuit 24-1 is input to the relay operation control circuit 25-2.

The relay operation/operation control circuit 25-2 controls the reproduction circuit 22-2 to perform a relay operation of the signal of the allocated communication time slot No. 1 among communication time slot No. 1 to communication time slot N. I do.

At the base station, the control time slot signal from the slave station is received via the antenna 15 and the transceiver 14 via the relay station, and the control signal (B) 110 is sent to the control signal (B) detection circuit 11-. 3, control code (B) 1
Time slot 1 based on the detection result of response code 09.
The number code decoding circuit 12-1 operates. As a result, the communication data 103 from the terminal is encoded by the time slot 1 code decoding circuit 12-1 and then sent to the slave station, and the communication data 103 from the slave station is encoded by the time slot 1 code decoding circuit 12-1. After decoding, the data is sent to the terminal. At this time,
The signal structure of the communication time slot between the base station and the slave station is only communication data, as shown in FIG. 3 (3).

When the communication between the base station and the slave station ends, a communication time slot release signal is generated in the communication time slot release circuit 13-2 of the base station, and this causes the time slot 1 code decoding circuit 12-1 The operation of the control signal (A) is stopped, and the control signal (A) 10 is generated by the generating circuit 11-2, including the control code (A) 105 of the release code, the time thrower 1 of the code of time slot 1, and the number code 106.
'8 is generated, the transmitter/receiver 14 and the antenna 15 are traversed, and the signal is transmitted to the slave station.

In the relay station, the communication time slot release signal detection circuit 24-2 detects the release code of control code (Δ) 105 and the code of communication time slot No. 1 of the time slot number code, and generates the communication time slot release signal. is input to the relay operation control circuit 25-2. The relay operation control circuit 25-2 controls the reproduction circuit 22-2 to stop the relay operation for the communication time slot No. 1, which has already been allocated and is in the relay operation.

When the slave station detects the release code from the base station, it stops transmitting and receiving signals in communication time slot No. 1. The configuration of the relay station according to the embodiment of the present invention includes a squelch determination circuit 24- in order to prevent erroneously continuing the communication time slot relay operation when the communication time slot release signal is not detected due to fading or the like. It is equipped with 3.

The squelch determination circuit 24-3 determines whether the squelch is 0N10FF for each time slot based on the squelch signal whose received electric field is detected from the receiving fi 21-1, and if the squelch is OFF'F in a specific time slot ( 0 communication time slot release signal detection circuit 24-2 outputs time slot information in which the squelch is OFF to the communication time slot release signal detection circuit 24-2 (when the received electric field disappears), the squelch determination circuit 24 Based on the time slot information from -3, output a communication time slot release signal to the relay operation control circuit 25-2;
The relay operation is stopped for the squelch OFF time slot.

(Effects of the Invention) As explained above, in the wireless relay system of the present invention, a communication line between a base station, a relay station, and a slave station has a control time slot and a communication time slot. When the relay station detects the start code included in the signal of The receiving relay station has means for relaying and transmitting the designated communication time slot signal based on the communication time slot setting information included in the control time slot signal from the base station, and At the end of the communication, there is a means for stopping the relay of the designated communication time slot signal based on the communication time slot release information included in the control time slot signal sent again from the base station. Therefore, it is possible to communicate with the communication time slot as a signal t1-1 consisting only of communication data.

Therefore, according to the present invention, there is no need for a start code for determining the presence or absence of communication data used in the conventional technology, and communication can be performed by sending and receiving only communication data, thereby increasing the transmission efficiency of communication data. There is an effect that can be done.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a wireless relay system according to an embodiment of the present invention, FIG. 2 is a frame configuration diagram of a communication signal according to an embodiment of the present invention, and FIG.
The figure is a signal configuration diagram of a time slot according to an embodiment of the present invention.
Fig. 5 is a block diagram of a base station according to an embodiment of the present invention, Fig. 5 is a block diagram of a relay station according to an embodiment of the present invention, Fig. 6 is a system block diagram of a time division multiple access communication system, and Fig. 7 is a block diagram of a conventional FIG. 8 is a block diagram of a relay station, and is a signal block diagram of a conventional time slot. 1...Base station, 2.2', 4.4'...
...Relay station, 3,5...Slave station, 6...
... Downlink relay means, 7... Uplink relay means, 8
, 8'...Start code detection means, 9.9
'... Relay control means, 11... First control time slot signal transmission/reception means, 11-1...
... Synchronization code generation circuit, 11-2 ... Control signal (A) generation circuit, 11-3 ... Control signal (B) detection circuit, 12 ... First communication time slot signal transmitting/receiving means, 12-1...Time thrower No. 81 code decoding circuit, 12-N...Time slot N code decoding circuit, 13...・
Communication time slot setting/cancellation means, 1.3-1.
...Communication time slot setting circuit, 13-2
...Communication time slot release circuit, 14.
...Transmitter/receiver, 15...Antenna, 2
1...downlink relay means, 21-1...old receiver, 21-2...regeneration circuit, 3 to 21...
...Transmitter, 22...Uplink relay means,
22-1... Receiver, 22-2...
Regeneration circuit, 22-3...Transmitter, 23...
... Control time slot signal detection means, 24.
... Communication time slot setting/cancellation signal detection means, 24-1 Old... Communication time slot setting signal detection circuit, 24-2... Communication time slot release signal detection circuit, 24-3...Squelch determination circuit, 25...Relay control means, 25-1
...Relay time slot setting circuit, 25-2
...Relay operation 1! I 71 circuit, 26...
・Base station side antenna, 27...Base station side duplexer, 28...Slave station side duplexer, two...
・Slave station side antenna, 31...Second control time slot signal transmitting/receiving means, 32...Second communication time slot signal transmitting/receiving means, 101...
・Preamble, 102...Start code, 103...Communication data, 104...
... Synchronization code, 105 ... Control code (A), 106 ... Time slot number code, 107 ... Identification code, 108 ...
...Control signal (A>, 109...Control code (B), 110...Control signal (B)
). Agent Patent Attorney Yoshi Hachiman Hiroshi Hiroki J 勺Hi Row 6 Cheeks J Friends Camellia 2
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Claims (1)

[Claims] In a time division multiple access communication system comprising one base station, one or more slave stations, and one or more relay stations that relay communication signals between the base station and the slave stations; The communication line between the station, the relay station, and the slave station has a required number of communication time slots used for transmitting and receiving predetermined communication data, and a communication line that can be used from among the required number of communication time slots. a required number of control time slots used for transmitting and receiving predetermined control signals including information for allocating communication time slots to the relay station and the slave station; ,
a first control time slot signal transmitting/receiving means for transmitting/receiving a signal of the control time slot; a first communication time slot signal transmitting/receiving means for transmitting/receiving a signal of the assigned communication time slot; Allocating and setting possible communication time slots, canceling the allocated communication time slots at the end of communication, and transmitting information regarding the allocation setting and cancellation to the first control time slot signal transmitting/receiving means and the first communication communication time slot setting/cancellation means for outputting a communication time slot signal to the communication time slot signal transmission/reception means; the relay station includes downlink relay means for relaying a signal from the base station side to the slave station side; uplink relay means for relaying a signal from the station side to the base station side; control time slot signal detection means for detecting the control time slot signal from the slave station side; communication time slot setting/cancellation signal detection means for detecting communication time slot allocation information and release information included in a control time slot signal; the control time slot signal detection means; and the communication time slot. Based on the signal detection results of the setting/cancellation signal detection means, the communication time slot is set to be assigned so that the control time slot signal is relayed without restriction to the control time slot. Relay control means for relaying control of the uplink relay means so as to relay only the signal of the assigned communication time slot, and to stop relaying of the signal of the assigned communication time slot at the end of the communication. The slave station includes a second control time slot signal transmitting/receiving means for transmitting/receiving the signal of the control time slot, and a second control time slot signal transmitting/receiving means for transmitting/receiving the signal of the allocated communication time slot.
1. A wireless relay system comprising: communication time slot signal transmitting/receiving means.