JP3095934B2 - Multi-channel line connection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention uses an occupied line comprising a plurality of communication channels and control channels, connects a plurality of terminal devices via a relay device, and searches for an empty communication channel. The present invention relates to a multi-channel line connection system in which arbitrary terminal devices can communicate with each other through a channel, and more particularly, to a multi-channel line connection system in which one terminal device can simultaneously call all other terminal devices in any state.

[0002]

2. Description of the Related Art As shown in FIG. 10, a wireless device such as a specific low-power wireless device that has recently become widespread accommodates only communication channels (a, b, c...) Each having a specific one communication frequency. Wireless repeaters (repeaters) 51, 5
2, 53... Are installed, and a plurality of wireless terminal devices 51A to 51C, 52A to 5
A configuration in which 2C and 53A to 53C are connected is known. The communication between the wireless terminal devices is performed via the corresponding wireless relay device. However, FIG.
Since the combination of each of the wireless relay devices 51 to 53 and each of the wireless terminal devices 51A to 51C, 52A to 52C, and 53A to 53C is fixed in the wireless device 0, for example, the wireless relay device 51 of the a channel is in use. , The b-channel or c-channel wireless relay device 5
There is a drawback in that even if 2 and 53 are vacant, they cannot be used. In addition, since a wireless relay device is required for each communication channel, an increase in cost cannot be avoided.

In order to improve such a disadvantage, FIG.
, A plurality of communication channel repeaters 61a, 61b, 61c... Are built in one wireless repeater 61, and a wireless device is configured to connect a plurality of wireless terminal devices 61A, 61B, 61C. Then, as shown in FIG.
A plurality of communication channels N1, N2, N of different radio frequencies
3 and an occupied line composed of a control channel C of a radio frequency different from this radio frequency,
One wireless terminal device having a unique number
When a connection request is made from A to another wireless terminal device having another unique number, for example, 61C, through the control channel C, an empty communication channel is searched and secured from a plurality of communication channels, and both wireless terminal devices 61A , 61C by using a channel designation signal to notify the idle communication channel searched through the control channel C, and relaying the idle communication channel, thereby transmitting the two wireless terminal devices 61A, 61C.
2. Description of the Related Art A multi-channel line connection system has been provided in which a mutual communication can be performed through an idle communication channel.

[0004]

However, in such a conventional multi-channel circuit connection system, when it is desired to call all the other wireless terminal devices from one specific wireless terminal device at the same time, the following reasons are required. There is a problem that calling is difficult. That is, the simultaneous call signal from one wireless terminal device and the normal call signal from another wireless terminal device overlap, and the timing at which a call is started differs depending on the wireless terminal device. Synchronization between devices is not possible. In addition, when all call channels are in use at the time of simultaneous calling and the caller continues to transmit, the wireless relay device cannot allocate the call channel.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in consideration of the above circumstances. In any state, a multi-channel line connection system which enables one terminal device to simultaneously call all other terminal devices is provided. The purpose is to provide.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a relay device, and when the relay device receives a paging request signal from one terminal device to all other terminal devices, all of the active calls are executed. Call termination control, search and reservation of an empty communication channel from among the communication channels, and relaying of the reserved empty communication channel in series, so that one terminal device can communicate with all other terminal devices. This is a multi-channel line connection method. The detailed configuration is such that a plurality of terminal devices are connected via a relay device using an occupied line including a plurality of communication channels having different frequencies and a control channel having a frequency different from those frequencies, and one terminal is connected to the other terminal. When a connection request to another terminal device is made from the device through the control channel, a search is made for a free communication channel from among all the communication channels, and a search is made for the free communication channel. In the multi-channel line connection method of notifying the searched free call channel by a channel designation signal and relaying the free call channel to enable communication between the two terminal devices, the relay device includes the terminal device. One of the terminal devices sends a paging request signal to all the other terminal devices to the wireless relay device. When the call is received, the call termination control of all the ongoing calls is performed by relaying the above-mentioned communication channel, and subsequently, a search and reservation of an empty communication channel from among all the above-mentioned communication channels are performed, and further, the reservation is performed there. Multi-channel line connection characterized in that it is configured to enable a call from any one of the terminal devices to all other terminal devices by relaying the established free call channel. It is a method.

Further, in the invention having the above configuration, the relay device is assigned a spare communication channel,
And, when the general paging request signal is received from any one of the terminal devices, the call termination control of all the calls being executed by relaying the communication channel is performed, and A search is made for a free communication channel from among the communication carriers, and when a carrier is detected from all of the communication channels in the search result, any of the terminal devices is relayed by relaying the spare communication channel. A multi-channel line connection system characterized by being configured to enable a call from one terminal device to all the other terminal devices.

[0008]

According to the present invention, when one terminal device transmits a paging request signal to all the other terminal devices to the relay device, the relay device transmits the paging request signal to all the terminal devices, and After terminating the call on all of the relayed lines, searching and securing an empty communication channel from among a plurality of communication channels, notifying all terminal devices of the empty communication channel searched through the control channel by a broadcast signal, By relaying the idle communication channel, the one terminal device and all the other terminal devices can communicate with each other through the idle communication channel.

Further, according to the present invention, when a paging request signal is received from one terminal device by assigning a spare communication channel to the relay device in advance, the relay device makes a call to all of the currently relayed lines. After termination, if a carrier is detected in all communication channels even after searching for an available communication channel, the spare communication channel is notified to all terminal devices by a broadcast signal.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited by the embodiment. FIG. 1 is a block diagram showing the configuration of a wireless device to which the multi-channel line connection system of the present invention is applied.
Is a wireless relay device, and 10 is a plurality of wireless terminal devices connected to the wireless relay device 1, for example, 2, 3, 4, 5,
An example is shown in which six units 6, 7 are connected. here,
An empty communication channel is secured between the wireless terminal device 2 and the wireless terminal device 3, an empty communication channel is secured between the wireless terminal device 4 and the wireless terminal device 7, and the wireless terminal device 5 and the wireless terminal device 6 A case is shown as an example in which a free communication channel is secured between.

A connection request signal 2a from the wireless terminal device 2 to the wireless terminal device 3 is transmitted through the control channel to the wireless relay device 1.
Then, after the wireless relay device 1 searches for and secures a free communication channel, the wireless relay device 1 notifies the wireless terminal devices 2 and 3 of the communication channel number using the channel designation signal 2b, and starts relaying the communication channel. After receiving the channel designation signal, the wireless terminal devices 2 and 3
Initiate a call over the specified call channel. Connection request signal 4a from wireless terminal device 4 to wireless terminal device 7 and connection request signal 5 from wireless terminal device 5 and wireless terminal device 6
Similarly, the wireless relay device 1 responds to the channel a by the channel designation signals 4b and 5b, and starts the relay operation through the respective communication channels.

FIG. 2 is a block diagram showing the configuration of another wireless device to which the multi-channel line connection system of the present invention is applied.
The configuration is basically the same as that of FIG. 1 are indicated by the same reference numerals. Here, an example is shown in which the wireless terminal device 2 simultaneously calls all the other wireless terminal devices 3 to 7.

At the same time that the simultaneous call request signal 2A from the wireless terminal device 2 to all the wireless terminal devices 2 to 7 is transmitted to the wireless relay device 1 through the control channel, the connection from the wireless terminal device 4 to a specific wireless terminal device is performed. Request signal 4A
Transmits to the wireless relay device 1 through the control channel,
The connection request signal 4A is discarded by the wireless relay device 1, and the simultaneous request signal 2B is sent to all the wireless terminal devices 2 to 7.
Is sent to put all the communication lines in a call termination state. At this time, all the wireless terminal devices 2 to 7 wait for a simultaneous signal. After that, the wireless relay device 1 searches for and secures an empty communication channel, and then notifies the searched communication channel number to all the wireless terminal devices 2 to 7 by the broadcast signal 2C through the control channel. Thus, it is possible to simultaneously call all the other wireless terminal devices 2 to 7 from one wireless terminal device 1 in any state.

FIG. 3 is a block diagram showing a specific configuration of the wireless relay apparatus 1 shown in FIGS. 1 and 2. The wireless relay apparatus 1 includes a control unit 11, a transmission / reception unit 12 for a control channel, and a communication channel # 1. It comprises a transmission / reception unit 13, a transmission / reception unit 14 for communication channel # 2, a transmission / reception unit 15 for communication channel # 3, a transmission antenna sharing unit 16, a reception antenna distribution unit 17, a transmission antenna 18, and a reception antenna 19. In addition,
The number of transmission / reception units of the communication channel is an example, and four or more transmission / reception units can be provided. The control section 11 outputs the output signals 11a, 11b, 11c, 11d to the control channel transmission / reception section 12 and the communication channel # 1 transmission / reception section 1, respectively.
3. Output to the transmission / reception unit 14 of the communication channel # 2 and the transmission / reception unit 15 of the communication channel # 3 to control the operation of each unit. The receiving system receives signals 17a, 17b, 17c, and 17 from the receiving antenna 19 through the receiving antenna distribution unit 17.
The data is distributed to the transmission / reception units 12, 13, 14, and 15 by 17d. The transmission system includes the transmission / reception units 12, 13, 1
4 and 15 are transmitted from the transmission antenna 18 through the transmission antenna sharing unit 16. In the case of a control channel, the received control signal is an output signal 1 of the transmission / reception unit 12 of the control channel.
The control signal to be transmitted and notified to the control unit 11 by 2a is transmitted and notified to the transmission / reception unit 12 of the control channel by the output signal 11a from the control unit 11. The presence / absence of a carrier detected by the transmission / reception unit 13 of the communication channel # 1, the transmission / reception unit 14 of the communication channel # 2, and the transmission / reception unit 15 of the communication channel # 3 is determined by the carrier detection signal 13b, 1.
The control unit 11 is notified by 4b and 15b.

FIG. 4 is a block diagram showing a specific configuration of the control unit 11 shown in FIG. 3. The control unit 11 includes a signal identification unit 20, an idle communication channel detection unit 21, a channel registration control unit 22,
Channel registration table 23, channel designation signal generator 2
4, a transmission signal buffer 25, a channel designation signal canceller 26, a transmission control unit 27, and a simultaneous call control unit 28. The received control signal is sent to the signal identification unit 20 by the output signal 12a of the transmission / reception unit 12 of the control channel.
A free channel request is transmitted to the free communication channel detecting unit 21 by a. The idle communication channel detector 21 sends a channel reservation request to the channel registration controller 22 by a signal 21a. The channel registration control unit 22 searches the channel registration table 23 to secure a free communication channel, registers the same, and sends the channel number to the free communication channel detection unit 21 via a signal 22a.

The idle communication channel detecting section 21 notifies the transmission / reception section of the communication channel of FIG. 3 corresponding to that channel by a relay start request corresponding to any of 11a, 11b and 11c, and generates a channel designation signal. By notifying the channel number to the unit 24, a request to generate a channel designation signal is made. Channel designation signal generator 2
4 generates channel designation signal data and outputs
The channel designation signal data is written to the transmission signal buffer 25 through a. The transmission control unit 27 operates independently. If there is data to be transmitted in the transmission signal buffer 25, it takes out the data and requests the transmission / reception unit 12 of the control channel via the output signal 11a to transmit.

If the received control signal is determined to be a paging request signal by the signal identification section 20, a channel search instruction is issued to the channel registration control section 22 through the output signal 20b. The channel registration control unit 22 searches whether a channel has already been registered. If the channel designation signal has already been registered, the channel designation signal canceller 26 is instructed to delete the channel designation signal by the output signal 22d. The channel designation signal canceller 26 searches the contents of the transmission signal buffer 25 and deletes the channel designation signal. The channel registration control unit 22 further notifies the general call control unit 28 that there is a general call request through the output signal 22c. The simultaneous call control unit 28 is provided with the idle call channel detecting unit 21.
Is requested by the signal 28b to end the relay to all the communication units. Also, the simultaneous call control unit 2
8 transmits and stores the simultaneous request signal to the transmission signal buffer 25 by the signal 28a.

The simultaneous call control unit 28 searches for an idle (no carrier) communication channel based on the carrier detection signals 13b, 14b, and 15b from each of the communication units. Signal 2 to notify the relayed call unit of the relay process.
8b. The idle communication channel detection unit 21 instructs the unit to perform relaying by using any of the signals 11b, 11c, and 11d. At this time, when no free communication channel is detected by the simultaneous call control unit 28, the free communication channel detection unit 21 is instructed to shift, for example, the transmission / reception unit 13 of the communication channel # 1 to the standby communication channel. Receiving this instruction, the transmission / reception unit 13 of the communication channel # 1 changes the frequency to the standby communication channel, performs carrier sense, and notifies the general call control unit 28 by the signal 13b. General call control unit 2
8 confirms that there is no carrier by the signal 13b, and then sends the signal 28b to the idle communication channel detecting unit 21.
Thus, the transmission / reception unit 13 of the communication channel # 1 is instructed to be in the relay state. Upon receiving this instruction, the idle communication channel detecting section 21 receives the instruction, and transmits and receives the transmission / reception section 13 of the communication channel # 1.
Is instructed by the signal 11b to enter the relay state. Thus, the transmission / reception unit 13 of the communication channel # 1 enters the relay state. The broadcast call control unit 28 stores a broadcast signal for notifying the wireless terminal device of the communication channel that has entered the previous communication state to the transmission signal buffer 25 by the signal 28a.

FIG. 5 is a block diagram showing a specific configuration of each of the wireless terminal devices 10 shown in FIGS.
0 indicates a modulation circuit 32, a transmission unit 33, a connection request signal generation unit 34, a transmission control unit 35, a T1 timer 36, and a signal detection unit 3.
7, a transmission / reception switching unit 38, an audio amplifier 42, a demodulation circuit 43, a reception unit 44, a synthesizer 45, and the like. Turning on the call switch 40 instructs the transmission control unit 35 to call. Transmission control unit 35
Outputs a transmission instruction signal 35c, and in response,
3 is in the transmission state, and the transmission / reception switching unit 38 is in the transmission state. The transmission control unit 35 outputs a reset signal 35d to the T1 timer 36, and in response,
6 is reset to a standby state. Further, the transmission control unit 35 instructs the connection request signal generation unit 34 to transmit a connection request signal through a signal 35a, and instructs the audio amplifier 42 to stop the signal through a signal 35b. You.

If the connection request signal generating section 34 is set in advance to perform a normal call, the connection request signal generation section 34 transmits the signal 34a to the modulation circuit 32 as a connection request signal, and is set in advance to perform a simultaneous call. , The signal 34a is transmitted as a paging request signal. The modulation circuit 32 modulates the voice and the signal 34a from the microphone 31 and sends them to the transmission unit 33 as a modulation signal 32a.
After that, transmission is performed from the antenna 39 via 8. When the connection request signal generator 34 finishes generating the signal 34a, it notifies the transmission controller 35 of the end signal 34b. In response to this, the transmission control unit 35 stops outputting the signals 35b, 35c, and 35d. As a result, the transmission unit 33 stops transmission, the transmission / reception switching unit 38 enters a reception state, and the audio amplifier 4
Since the speaker 2 is turned on, the speaker 41 is driven. At the same time, the T1 timer 36 starts measurement, and when a certain time (T1) has elapsed, the T1 timer 36 sends an end signal 36a to the transmission control unit 35. As a result, the transmission control unit 35 enters a state of waiting for the call switch 40 to be turned on, and the audio amplifier 42 is turned off, so that the driving of the speaker 41 is prohibited.

When the connection request signal generator 40 is set in advance to perform a normal call, when the channel designation signal is received during the measurement of the T1 timer 36, the signal detector 3
7 extracts channel information from this signal, and outputs this channel information to the synthesizer 45 via a signal 37b. As a result, the synthesizer 45 shifts the frequency to this channel. Also, the signal 37a is output from the signal detection unit 37, the T1 timer 36 is stopped, the transmission control unit 35 is in a talking state, and the audio amplifier 42 is in an on state.

In any state, when the simultaneous request signal is received, the signal detection unit 37 instructs the transmission control unit 35 and the audio amplifier 42 to enter a standby state by a signal 37a, and the T1 timer 36 measures time. Instruct.
When the T1 timer 36 completes the measurement, it outputs an end signal 36a, the transmission control unit 35 waits for the call switch 40 to turn on, and the audio amplifier 42 turns off. In any state, when the simultaneous signal is received, the signal detection unit 37 extracts the channel information from the signal, and outputs the channel information to the synthesizer 45 via the signal 37b. As a result, the synthesizer 45 shifts the frequency to this channel. Also, the signal 37a is output from the signal detection unit 37, the T1 timer 36 is stopped, the transmission control unit 35 is in a talking state, and the audio amplifier 42 is in an on state.

FIG. 6 shows a first method for connecting a multi-channel line according to the present invention. When a connection request signal S is transmitted from the wireless terminal device 10 to the wireless relay device 1, FIG. 4 shows a timing chart in a case where channel designation signals C1, C2, and C3 are returned before a predetermined time (T1) elapses from the relay device 1. FIG. a is a transmission signal of the wireless terminal device 10, S is a connection request signal, b is a transmission signal of the wireless relay device 1, C1, C2, C3
Indicates a channel designation signal. Note that the number of channel designation signals is an example. When the wireless relay device 1 receives the connection request signal S from the wireless terminal device 10 and receives the connection request signal S, the wireless relay device 1 searches for and secures an idle communication channel, and notifies the channel number of the channel designation signal C1,
Create C2 and C3. Then, each is transmitted.

FIG. 7 shows a second method for connecting a multi-channel line according to the present invention. The paging request signal S from the radio terminal apparatus 10 to the radio relay apparatus 1 is shown.
A is transmitted from the wireless relay device 1 for a certain time (T
The timing chart in the case where the simultaneous request signals IY1, IY2, IY3 and the simultaneous signals IS1, IS2, IS3, IS4... Are returned within 1) is shown. a is a transmission signal of the wireless terminal device 10, SA is a paging request signal, b is a transmission signal of the wireless relay device 1, IY1, IY2,
IY3 is a simultaneous request signal, IS1, IS2, IS3, IS
4 indicate simultaneous signals. When the paging request signal SA is transmitted from the wireless terminal device 10, the wireless relay device 1
Receives this, the simultaneous request signals IY1, IY2, I
Y3 is transmitted to end the relay of all communication lines, and a simultaneous signal IS1, IS2, IS3, IS4, ... for searching for and securing an empty communication channel and notifying the channel number.
Create Then, each is transmitted. The transmission of these simultaneous signals IS1, IS2, IS3, IS4,... Is performed until the call ends. This is to bring in as many wireless terminals as possible during the simultaneous call.

FIG. 8 shows a third method for connecting a multi-channel line according to the present invention, in which a connection request signal Sa is transmitted from one wireless terminal device A to a wireless relay device 1, Timing chart when the paging request signal Sb is transmitted from another wireless terminal device B before the relay device 1 returns the channel designation signal, and the wireless relay device 1
2 shows the contents of the transmission signal buffer 25 in the table. a
Is a transmission signal of the wireless terminal device A, Sa is a connection request signal, b
Is a transmission signal of the wireless terminal device B, Sb is a paging request signal, c is a transmission signal of the wireless relay device 1, CSa1, CSa
2, CSa3 are channel designation signals, IY1, IY2, I
Y3 is a simultaneous request signal, IS1, IS2, IS3, IS4
... is a simultaneous signal. Reference numerals 25A to 25G denote transmission signal buffers, each of which shows a state in which the contents change over time.

When the wireless relay device 1 receives the connection request signal Sa from the wireless terminal device A and receives the connection request signal Sa, the wireless relay device 1 searches for and secures an idle communication channel, and notifies the channel number of the channel designation signal CSa1, CSa2. , C
Sa3 is created, and each is written to the transmission signal buffer as 25A. Next, when the paging request signal Sb is transmitted from the radio terminal device B, when the radio relay device 1 receives this, all the channel designation signals CSa1, CSb
2, CSc3 are erased and the simultaneous request signals IY1, IY
2, IY3 is written into the transmission signal buffer as 25B, the relay of all calls is terminated, and the simultaneous signals IS1, IS2, IS3, IS4... create. Then, each is written into the transmission signal buffer as 25B. When the transmission is enabled, the wireless relay device 1 sequentially transmits the contents of the transmission signal buffer as 25C to 25G. In addition, the wireless relay device 1 sequentially writes the broadcast signal each time a transmission signal buffer becomes available in order to continue transmitting the broadcast signal until the end of the call. Steps A to L in FIG. 9 are flowcharts showing a method of connecting a multi-channel line performed according to the present invention as described above.

As described above, according to the present invention, when a multi-channel line is connected, it is possible to simultaneously call all the other wireless terminal devices from one wireless terminal device in any state for the following reasons. can do. By making a simultaneous call from one wireless terminal device to all other wireless terminal devices, synchronization can be established between all wireless terminal devices, so that a call can be started simultaneously among all wireless terminal devices. . Even if all the communication channels are busy (there is a carrier), by assigning a spare communication channel to the wireless relay device in advance, the general call can be relayed by using the spare communication channel to relay the general call. Certainty can be guaranteed. Further, as is apparent from FIGS. 1 and 6, by making individual calls among all the wireless terminal devices, it is possible to reliably perform a pair of one-to-one communication. Although the number of wireless terminal devices has been described by way of example in the text, this number can be arbitrarily changed according to the purpose, application, and the like. Further, the present invention can be applied to any wireless field that employs a multi-channel access method within the provisions of the radio equipment for a specific low-power radio station. In the present embodiment, all the lines being relayed are terminated by the simultaneous request signal, but the configuration may be such that the line is held in a locked state for establishing the simultaneous call state. In this embodiment, the wireless system is used. However, a configuration in which a part of the control channel is a wired system, such as a wired system, or all of the control channels may be a wired system may be employed.

[0028]

As described above, according to the present invention, when one wireless terminal device transmits a paging request signal to all other terminal devices to the relay device, the relay device transmits to all the terminal devices. After transmitting the simultaneous request signal to terminate the call on all the currently relayed lines, searching for and securing an empty communication channel from a plurality of communication channels, and searching for an empty channel through the control channel for all terminal devices. Is notified by a simultaneous signal, and by relaying this idle communication channel, the one terminal device and all the other terminal devices can communicate with each other through the idle communication channel. It is possible to allow a terminal device to simultaneously call all other terminal devices.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a wireless device to which a multi-channel line connection system of the present invention is applied.

FIG. 2 is a block diagram showing a configuration of another wireless device to which the multi-channel line connection system of the present invention is applied.

FIG. 3 is a block diagram showing a configuration of the wireless relay device shown in FIGS. 1 and 2;

FIG. 4 is a block diagram showing a configuration of a main part of FIG. 3;

FIG. 5 is a block diagram showing a configuration of the wireless terminal device shown in FIGS. 1 and 2;

FIG. 6 is a timing chart showing a first method for connecting a multi-channel line according to the present invention.

FIG. 7 is a timing chart showing a second method for connecting a multi-channel line according to the present invention.

FIG. 8 is a timing chart showing a third method for connecting a multi-channel line according to the present invention.

FIG. 9 is a flowchart showing a method for connecting a multi-channel line according to the present invention.

FIG. 10 is a block diagram showing a conventional example.

FIG. 11 is a block diagram showing another conventional example.

FIG. 12 is a schematic explanatory diagram of a multi-channel line.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 wireless relay device 2 to 7, 10 wireless terminal device 11 control unit 12 control channel transmission / reception unit 13 to 15 communication channel transmission / reception unit 20 signal identification unit 21 idle communication channel detection unit 22 channel registration control unit 23 channel registration table 24 Channel designation signal generation unit 25 Transmission signal buffer 26 Channel designation signal canceller 27 Transmission control unit 28 General call control unit 32 Modulation circuit 33 Transmission unit 34 Connection request signal generation unit 35 Transmission control unit 36 T1 timer 37 Signal detection unit 38 Transmission Reception switching unit 43 Demodulation circuit 44 Receiving unit 45 Synthesizer Sa Connection request signal Sb Simultaneous call request signal IY1, IY2, IY3 Simultaneous request signal IS1, IS2, IS3, IS4 Simultaneous signal

Claims (2)

(57) [Claims] A terminal device is connected to a plurality of terminal devices via a relay device using an occupied line including a plurality of communication channels having different frequencies and a control channel having a frequency different from those frequencies. When a connection request to another terminal device is made through the control channel from, a search is made for a free communication channel from among all the communication channels, and a search is made for an empty communication channel. In the multi-channel line connection method of notifying the idle call channel by a channel designation signal and relaying the idle call channel to enable communication between the two terminal devices, the relay device is one of the terminal devices Any one of the terminal devices transmits a paging request signal for all the other terminal devices to the wireless relay device. In this case, the call termination control of all the calls being executed by relaying the communication channel is performed, and then a search and reservation of an empty communication channel are performed from among all the communication channels. A multi-channel line connection system, characterized in that it is configured to enable a call from any one of the terminal devices to all other terminal devices by relaying the idle call channel. . 2. The relay apparatus according to claim 1, wherein a spare communication channel is allocated, and when the paging request signal is received from any one of the terminal apparatuses, When the call termination control of all the above-mentioned calls being executed by the relay is executed, a search is made for a free communication channel from among all the above-mentioned call carriers, and when a carrier is detected from all the above-mentioned communication channels in the search result. Wherein a call is relayed from the one of the terminal devices to all of the other terminal devices by relaying the spare call channel. Item 2. The multi-channel line connection method according to Item 1.