JPH0423630A - Multi-direction multiplex communication system - Google Patents

Abstract

PURPOSE:To attain two-way simultaneous talking among 3-subscribers by allocating a 1st talking channel corresponding to a caller terminal equipment and allocating a 2nd talking channel and a 3rd talking channel corresponding to a 1st called destination terminal equipment and a 2nd called destination terminal equipment respectively in response to a three-party talking request. CONSTITUTION:When a subscriber requesting a three-party talking makes a request of three-party talking by dialing a special number or hooking or the like, a slave station control section 19 controls a multiplexer section 18-1 so as to send three-party talking request information, 2nd talking channel allocation request information and 3rd talking channel allocation request information to a master station 3 via a 1st talking channel allocated already. The 2nd talking channel allocation information and the 3rd talking channel allocation information are inputted to the slave station control section 19 via a 1st multiplexer/demultiplexer means 13, a 1st transmission/reception means 12 of a master station, a transmission line from the master station 3 to a slave station 4-1, a 2nd transmission/reception means 17 and a 2nd multiplexer/ demultiplexer means 18 of the slave station 4-1.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a multidirectional multiplex communication system that performs communication using a demand assignment method that allocates a communication channel between a master station and a slave station only when a call occurs. Regarding 3.
The present invention relates to a multidirectional multiplex communication system that enables simultaneous two-way communication between subscribers.

(Prior Art) Conventionally, as a means of connecting and accommodating terminal devices such as telephones that are geographically distant from the exchange, a method has been used in which subscriber lines from the exchange are once accommodated in a master station, and then the subscriber lines from the terminal devices are connected to the exchange. A subscriber line is accommodated in each slave station installed near the terminal device, and the master station and each slave station are connected via a transmission path such as a wireless one, and
Each time a call occurs to a terminal device, a communication channel is assigned to the transmission path between the slave station and the master station to which the terminal device to which the call occurred is connected, and communication is performed by connecting the exchange and the terminal device. A direction multiplex communication system is used. An example of the configuration of a conventional multidirectional multiplex communication system is shown in FIG. 5, where 1 is an exchange, 2-1, 2-2, . , 4-1.4-2.4-3 is a slave station, 5
-1.5-2, ...5-9 is the second subscriber line,
6-1.6-2,...6-9 are terminal devices, 7-
1.7-2.7-3 is a master station/slave station transmission line. Fifth
The figure illustrates a case where three slave stations are connected to a master station via transmission lines, and three terminal devices are connected to each slave station via a second subscriber line. Moreover, FIG. 6 is a diagram showing a conventional example of a frame structure of time division multiplex communication on a transmission line between a master station and each slave station, and shows an information transmission channel of a time slot (number 0) and an information transmission channel of a time slot (number 1). It consists of N communication channels numbered from (N) (N is a positive integer).

For example, when a call occurs in the terminal device 6-1, the information transmission channel (number 0) is sent from the slave station 4-1 to the master station 3.
Communication channel allocation request information is sent via the . The master station 3 controls the allocation of vacant communication channels from among the N communication channels, for example, allocates the communication channel (No. 1) to the transmission path 7-1, and transfers the communication channel allocation information to the information transmission channel (No. 0). It is sent to slave station 4-1 via. The slave station 4-1 sends the destination connection information (or dialing signal if the terminal device is a telephone) from the terminal device 6-1 to the master station 3 via the assigned communication channel (No. 1). If the destination is, for example, terminal device f6-9, another vacant communication channel, for example, communication channel (No. 2) is assigned to the transmission path 7-3 between the master station 3 and slave station 4-3, and the terminal Device 6-1 and terminal device 6-9
In order to connect the master station and the slave stations 4-1 and 4-3, a communication channel is allocated and secured on the transmission path between the master station and the slave stations 4-1 and 4-3.

The connection information of the called party is sent to the master station 3 via the first subscriber line 2-1.
is sent to the exchange 1, and in the exchange 1, connection control of the communication line between the terminal equipment 6-1 and the first subscriber line 2-9 is performed, and the first subscriber line 2-1 and the first subscriber line 29 are connected, and the terminal equipment 6-
Communication will take place between No. 1 and No. 6-9.

As described above, in a multidirectional multiplex communication system, only when a call occurs to a terminal device, a communication channel is allocated to the transmission path between the master station and the slave station, and the communication line is secured.
Communication between terminal devices can be performed efficiently.

(Problem to be Solved by the Invention) However, in the conventional multidirectional multiplex communication system, the communication channel assigned to the master station/slave station lock transmission line for a call request sent from one terminal device is
There is one communication channel corresponding to the calling terminal device and one communication channel corresponding to one destination terminal device.
Channel only. Because of this, simultaneous two-way communication between two subscribers is possible, but simultaneous two-way communication between three subscribers is not possible, and there is a drawback that advanced service requirements cannot be met.

An object of the present invention is to solve the above problems by
One communication channel corresponding to the calling terminal device is assigned to the slave station transmission path, and one communication channel is assigned to each of the first destination terminal device and the second destination terminal device based on the three-party call request. Two call channels are also allocated, and the master station combines the call information of the call channel corresponding to the first call destination terminal device and the call information of the call channel corresponding to the second call destination terminal device and sends the result. Connect to the call channel corresponding to the call terminal device, combine the call information of the call channel corresponding to the second call destination terminal device and the call information of the call channel corresponding to the calling terminal device, and send the call information to the first call destination. Connect to the call channel corresponding to the terminal device, and send the call information of the call channel corresponding to the calling terminal device and the first
By combining the call information of the call channel corresponding to the second call destination terminal device and connecting the call information to the call channel corresponding to the second call destination terminal device, the multi-channel communication system enables two-way simultaneous calls for three subscribers. An object of the present invention is to provide a direction multiplex communication system.

(Means for Solving the Problems) The multidirectional multiplex communication system of the present invention has the following means configuration in order to achieve the above-mentioned object.

That is, the multidirectional multiplex communication system of the present invention has one master station connected to an exchange via a first subscriber line, and one or more terminal devices connected via a second subscriber line. one or more slave stations, and is commonly used by each slave station for information transmission between the master station and the slave stations.
A multiplexed communication signal consisting of one or more information transmission channels and a plurality of communication channels allocated each time a call occurs to the terminal device by a demand assignment method is transmitted between the master station and the slave station. A multidirectional multiplex communication system that transmits and receives communications via a network, wherein the master station has one or more channels that process signals input to and output from the exchange via the first subscriber line. 1 subscriber interface means; a first receiving means for receiving the multiplexed communication signal transmitted by the slave station via the transmission path; a first separation means for separating and processing the signal of the information transmission channel into a first communication channel corresponding to the calling terminal device based on first communication channel allocation request information included in the signal of the information transmission channel; and three-way call request information, second call channel allocation request information, and third call channel allocation request information included in the signal of the first call channel among the call channels. Call channel allocation control means for performing control to allocate a second call channel corresponding to the first call destination terminal device and a third call channel corresponding to the second call destination terminal device based on;
a first communication channel included in the first communication channel signal;
a dominant call destination connection information sending means for outputting the call destination connection information and the second call destination connection information to the first subscriber interface means for inputting into the exchange; separating the call information from the signal of the call channel; call channel separation means for processing and outputting to the corresponding first subscriber interface means; first call information of the first call channel, second call information of the second call channel, and the third call information; With respect to the third call information of the call channel, the second call information and the third call information are combined to obtain first combined call information, and the third call information and the first call information are combined to create second combined call information. and collocation information synthesis means for synthesizing the first call information and the second call information to generate third composite call information; multiplexing the first composite call information to the signal of the first call channel, the second composite call information to the signal of the second call channel, and the first composite call information to the signal of the second call channel; 3. a communication channel multiplexing means for multiplexing the composite communication information into the signal of the third communication channel; multiplexing the signal of the communication channel and the signal of the information transmission channel to form a multiplexed communication signal; first multiplexing means for transmitting the multiplexed communication signal to the slave station via the transmission path; and in the slave station, the second subscriber line one or more second terminals processing signals input to and output from the terminal device via
subscriber interface means; second receiving means for receiving the multiplexed communication signal transmitted by the master station via the transmission path; and second receiving means for receiving the multiplexed communication signal via the transmission path; a second separating means for separating the call information from the signal of the call channel and outputting the separated call information to the corresponding second subscriber interface means; the second subscriber interface means; multiplexing the call information inputted from the terminal device output into the signal of the corresponding call channel, and multiplexing the signal of the call channel and the signal of the information channel to produce a multiplexed communication signal. a second multiplexing means for generating the multiplexed communication signal; a second transmitting means for transmitting the multiplexed communication signal to the master station via the transmission path;
control to include the communication channel allocation request information in the signal of the information transmission channel, and also includes the three-party communication request information and the second communication channel allocation request information based on the three-party communication request signal output from the terminal device. and a call channel allocation request control means for controlling to include third call channel allocation request information in the signal of the first call channel; a first call destination connection signal and a second call output from the terminal device; A three-party call destination connection request control means for controlling the first call destination connection information and the second call destination connection information to be included in the signal of the first call channel based on the destination connection signal; It is characterized by this.

(for production) Next, the present invention configured as described above will be explained in detail.

An information transmission channel and a communication channel are used between the master station connected to the exchange via the first subscriber line and the slave station connected to the terminal equipment via the second subscriber line. Communication is performed by transmitting and receiving the configured multiplexed communication signals via a transmission path between the master station and the slave stations. The information transmission channel of this multiplexed communication signal is commonly used by each slave station,
A call channel is assigned to a terminal device each time a call occurs under demand assignment control.

When the terminal device makes a call, a calling signal is input to the slave station via the second subscriber line. The communication channel allocation request control means of the slave station causes the second multiplexing means to include the first communication channel allocation request information in the signal of the information transmission channel and send it to the master station based on the calling signal. Control. The second multiplexing means includes the first speech channel allocation request information in the signal of the information transmission channel, multiplexes the signal of the information transmission channel and the signal of the speech channel to generate a multiplexed communication signal, and generates a multiplexed communication signal. output to the transmission means.

The second transmitting means modulates the baseband multiplexed communication signal and transmits the high frequency multiplexed communication signal to the master station via the transmission path. The first receiving means of the master station demodulates the high frequency multiplexed communication signal received from the slave station and outputs the baseband multiplexed communication signal to the first separation means. The first separating means separates the multiplexed communication signal into an information transmission channel signal and a speech channel signal.The speech channel assignment control means assigns a first speech channel assignment included in the information transmission channel signal. Based on the request information, control is performed to allocate one of the available communication channels as the first communication channel corresponding to the calling terminal device, and when the terminal device requests a three-way call, the three-way call request is executed. A signal is input to the slave station via the second subscriber line.

The call channel allocation request control means of the slave station controls the first call to which the three-party call request information, the second call channel allocation request information, and the third call channel allocation request information are allocated based on the champion call request signal. The second multiplexing means is controlled so as to include the signal in the channel signal and send it to the master station. A multiplexed communication signal including champion call request information, second call channel allocation request information, and third call channel allocation request information in the signal of the first call channel is output from the second multiplexing means, The signals of the first communication channel are input to the first separation means via the transmission means from the slave station to the master station, the transmission path from the slave station to the master station, and the first reception means, and the signals of the first communication channel are separated and processed.

The call channel allocation control means selects two of the available call channels based on the champion call request information, the second call channel allocation request information, and the third call channel allocation request information included in the first call channel. The second call channel and the third call channel are controlled to allocate the two call channels as a second call channel corresponding to the first call destination terminal device and a third call channel corresponding to the second call destination terminal device. Based on the assignment of the call channel, the slave station prompts the terminal device requesting the three-way call to send a call destination connection signal, and connects the first call output from the terminal device requesting the three-way call. The destination connection signal and the second destination connection signal are input to the slave station via the second subscriber line.

The three-party destination connection request control means of the slave station is configured to allocate the first destination connection information and the second destination connection information based on the first destination connection signal and the second destination connection signal. The second multiplexing means is controlled so that the second multiplexing means is included in the signal of the first communication channel and sent to the master station. The second multiplexing means, the second transmitting means, the transmission path from the slave station to the master station, and the first
The multiplexed communication signal is input to the first separating means via the receiving means, and the signal of the first speech channel is separated and processed. The three-party destination connection information sending means outputs the first destination connection information and the second destination connection information included in the signal of the first communication channel to the first subscriber interface means. One subscriber interface means outputs the signal via the first subscriber line to the exchange. The exchange makes a call to the first destination terminal device and the second destination terminal device, and the call information from the terminal device is sent to the second subscriber interface means of the slave station via the second subscriber line. is input. The second subscriber interface means outputs call information to the second multiplexing means. The second multiplexing means multiplexes the call information output from the terminal device into a corresponding call channel signal, and multiplexes the call channel signal and the information transmission channel signal to generate a multiplexed communication signal. and outputs it to the second transmitting means. The multiplexed communication signal is input to the first separating means via the second transmitting means, the transmission line from the slave station to the master station, and the first receiving means, and the information transmission channel signal and the communication channel signal are input to the first separating means. The signal of the 0 speech channel which is separated and processed is input to the speech channel separation means.The 0 speech channel separation means separates and processes the speech information from the speech channel signal and outputs it to the corresponding first subscriber interface means. . Also,
9. The call information synthesis means inputs the first call information of the first call channel, the second call information of the second call channel, and the third call information of the third call channel to the call information synthesis means. The call information and the third call information are combined to generate first combined call information, the third call information and the first call information are combined to generate second combined call information, and the first call information and the second call information are combined. The call information is combined to generate third combined call information.

On the other hand, call information from the exchange is input to the first subscriber interface means of the master station via the first subscriber line. The first subscriber interface means outputs call information to the call channel multiplexing means. The communication channel multiplexing means multiplexes the communication information of the exchange d into the signal of the corresponding communication channel, and also multiplexes the first composite communication information into the signal of the first communication channel and the second composite communication information into the signal of the second communication channel. and the third composite call information on the signal of the third communication channel, and output the signal of the communication channel to the first multiplexing means. The first multiplexing means multiplexes the communication channel signal and the information transmission channel signal to generate a multiplexed communication signal and outputs it to the first transmitting means. The first transmitting means modulates the baseband multiplexed communication signal and transmits the high frequency multiplexed communication signal to the slave station via the transmission path. The second receiving means of the slave station demodulates the high frequency multiplexed communication signal received from the master station and outputs the baseband multiplexed communication signal to the second separation means. The second separating means separates the multiplexed communication signal into an information transmission channel signal and a speech channel signal, and also separates and processes speech information from the speech channel signal and sends the speech information to the corresponding second subscriber interface means. Output. The second subscriber interface means outputs the call information to the terminal device via the second subscriber line.

Due to the above-described operation, simultaneous two-way communication between three subscribers is possible.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a master station in a multidirectional multiplex communication system according to an embodiment of the present invention. 1 is a switchboard, 2-1.2-2,...
...2-M is the first subscriber line corresponding to each terminal device when there are M terminal devices (M is a positive integer), 3 is the master station, and 11 is the first subscriber line 2-1, 2-2,
. . . and a first interface means for interfacing with the same 2-M, 11-1.11-2.・・・
・11-M is a component of the first interface means 11, and is a subscriber interface unit that inputs and outputs call connection information such as incoming/outgoing calls, call termination, call information, etc.; 12 is a component of the first interface means 11; 12-1 is a modulation unit that modulates the baseband multiplexed communication signal to be sent to the slave station into an intermediate frequency signal (■F signal); A demodulation unit receives a multiplexed communication signal from a slave station and demodulates the IF multiplied signal into a baseband multiplexed communication signal, 12-3 is an antenna unit, and 12-4 is a modulation unit 12-
■F signal from antenna unit 1 is converted into a high frequency signal (RF multiplied signal and sent to the antenna section 12-3, and the RF signal from the antenna section 12-3 is converted into an IF multiplied signal and connected to the demodulation section 12-2. The unit 13 multiplexes the signal to be sent to the slave station into a predetermined signal configuration corresponding to each of the information transmission channel and the communication channel, and outputs the multiplexed signal to the first transmitting/receiving means 12, thereby receiving the multiplexed communication transmitted by the slave station. A first multiplexing and demultiplexing means 13-1 receives signals from the first transmitting/receiving means 12 and demultiplexes them into required signals corresponding to the information transmission channel and the communication channel, respectively, and 13-1 is the subscriber interface section 11-1.
, 11-2, . . . , and 11-M, and multiplexes and separates call information for call channels. 13-2 is first call channel allocation information. a multiplexing unit 13-3 that multiplexes signals of information transmission channels such as the above, and outputs a multiplexed communication signal having a time division multiplexed communication frame structure on the transmission path to the modulation unit 12-1;
14 is a separation unit that separates signals of information transmission channels such as first call channel allocation request information from the demodulated multiplexed communication signal output from the demodulation unit 12-2, and 14 is a multiplexing unit 13-2.
2 and demultiplexing section 13-3 to control information transmission channel signals, etc., control the allocation of communication channels to line concentrator/demultiplexer 13-1, and subscriber interface section 11-1, 11-2, . 11-M is a main control unit that manages and controls the entire system including connection control with 11-M, and 15 is a signal input from the main control unit 14, which indicates a terminal requesting a three-way call. The first call destination connection information and the second call destination connection information specified by the device are transmitted to the subscriber interface section 11-1, the subscriber interface section 11-2, . . .
. . . or a three-party destination connection information sending section that sends it to the exchange 1 via the same 11-M.

In this embodiment, the subscriber interface units 11-1 to 11-M serve as first subscriber interface means, the first transmitting/receiving means 12 serves as first transmitting means and second receiving means, The line concentrator/multiplexer 13-1 functions as a communication channel multiplexing means, a communication channel separation means, and a communication information synthesis means, the multiplexing unit 13-2 functions as a first multiplexing unit, and the separation unit 13-3 functions as a first The separation means corresponds to the three-party destination connection information sending section 15, and the three-party destination connection information sending section 15 corresponds to the three-party destination connection information sending section. The main control section 14 also includes call channel allocation control means.

FIG. 2 is a diagram showing the configuration of a slave station of a multidirectional multiplex communication system according to an embodiment of the present invention. 4-1 is a slave station, 5-1.5-2.5-3
is the second subscriber line, and 6-1.6-2.6-3 is connected to the slave station 4-1 via the corresponding second subscriber lines 5-1, 5-2, and 5-3. The connected terminal device 16 is a second interface means 16-1.16- which interfaces to the second subscriber lines 5-1, 5-2 and 5-3.
2.16-3 is a subscriber interface unit that converts signal speed and inputs and outputs call information, etc., 16-4.16
-5.16-6 is a call (off-hook).

a call information detection unit that detects call information such as call termination (on-hook), three-party call request (for example, special number or hooking); 1;
7 is a second transmitting/receiving means for transmitting and receiving multiplexed communication signals to and from the master station via a transmission path; 17-1 is a modulation unit that modulates the baseband multiplexed communication signal to be sent to the master station and converts it into an IF multiplied signal;
7-2 is a demodulation unit that receives the multiplexed communication signal from the master station and demodulates the IF multiplied signal into the baseband multiplexed communication signal;
17-3 is an antenna section, and 17-4 is an RF flaw signal converter for the IP signal from the modulator 17-1, which is sent to the antenna section 17-3; The antenna common unit 18 connected to the demodulation unit 17-2 multiplexes the signal to be sent to the master station into a predetermined signal configuration corresponding to each of the information transmission channel and the speech channel, and outputs the multiplexed signal to the second transmitting/receiving means 17. and a second multiplexing and demultiplexing means, 18-, which receives the multiplexed communication signal sent out by the master station from the second transmitting/receiving means 17 and demultiplexes it into required signals corresponding to the information transmission channel and the communication channel, respectively. Reference numeral 1 denotes a multiplexer that multiplexes information transmission channel signals such as call information for a call channel and first call channel allocation request information into a predetermined signal configuration on a transmission path, and outputs the multiplexed communication signal to the modulation unit 17-1. converting section, 18-2 is demodulating section 1
A separation unit 19 separates the call information for the call channel for each terminal device from the demodulated multiplexed communication signal outputted from 7-2, and also separates the signal of the information transmission channel such as the first call channel allocation information. Call information detection unit 16-4
, 16-5 or 16-6, receives the first call channel allocation request information via the information transmission channel, and also sends the three-party call request signal, the first call destination connection signal, and the first call channel allocation request information. The multiplexing unit 18-1 receives the two call destination connection signals and sends the corresponding information to the master station via the first call channel assigned to the terminal device requesting the three-party call. control and separation unit 18-
Based on the first call channel allocation information from 2, the subscriber interface unit 16-1, 16-2 or 16-3 connected to the terminal device requesting the champion call.
The subscriber interface units 16-1 and 16 control the multiplexing unit 18-1 and the demultiplexing unit 18-2 so as to connect the mobile station and the assigned first communication channel, and transmit information from the slave station to the terminal device. This is a slave station control unit that performs management control of the slave station, including control for sending data via -2 or 16-3.

In this embodiment, the subscriber interface units 16-1 to 16-3 serve as second subscriber interface means, the second transmitting/receiving means 17 serves as second transmitting means and second receiving means, The multiplexer 18-1 corresponds to a second multiplexer, and the demultiplexer 18-2 corresponds to a second demultiplexer. Further, the slave station control section 19 includes a call channel allocation request control means and a three-party call destination connection request control means.

FIG. 3 is a diagram showing the operations of a master station and a slave station in response to a three-way call request from a terminal device.

FIG. 4 is a diagram showing call channel assignment on the frame structure of time division multiplex communication in the transmission path between the master station and the slave station in the multidirectional multiplex communication system according to the embodiment of the present invention, and the frame structure is composed of time slots. It is composed of an information transmission channel (number 0) and N communication channels numbered from time slots (number 1) to time slots (number N), and is similar to the conventional frame structure shown in FIG. 6, but the present invention In the embodiment, in response to a three-party call request generated from one terminal device, three free channels among all call channels (No. 1) to (No. N), for example, call channel (No. 1), call channel (No. 5) and a communication channel (No. K) are assigned.

The operation of the multidirectional multiplex communication system according to the embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, and 4.

For example, when the terminal device 6-1 makes a call (off-hook),
A calling signal is input to the second interface means 16 of the slave station 4-1 via the second subscriber line 5-1. The second interface means 16 includes the subscriber interface section 16-1. 16-2 and 16-3, and call information detection sections 16-4, 16-5, and 16-6, and the calling signal from the terminal device 6-1 is transmitted to the call information detection section. 1 detected by 16-4 and output to slave station control section 19
The slave station control unit 19 that has received the call signal sends the first communication channel allocation request information to the master station 3 via the information transmission channel (number 0).
Control is performed by outputting necessary signals to 8. The second multiplexing/demultiplexing means 18 is composed of a multiplexing section 18-1 and a demultiplexing section 18-2, and the multiplexing section 18-1 receives information transmission channel (0 The multiplexed communication signal containing the first call channel allocation request information is sent to the second
The signal is outputted to the modulating section 17-1, which is a component of the transmitting/receiving means 17. The second transmitting/receiving means 17 includes a modulating section 17-1, a demodulating section 17-2 . Antenna section 17-3 and antenna common section 17
-4, the baseband multiplexed communication signal input to the modulation section 17-1 is modulated and transmitted to the master station 3 via the antenna common section 17-4 and the antenna section 17-3. Ru.

The multiplexed communication signal sent from the slave station 4-1 via the transmission path is received by the first transmitting/receiving means 12 of the master station 3. The first transmitting/receiving means 12 includes a modulating section 12-1 and a demodulating section 12-1.
, the antenna section 12-3 and the antenna common section 12-4.
The baseband multiplexed communication signal received and demodulated by the demodulation section 12-2 via the baseband 12-4 is output to the first demultiplexing means 13. The first multiplexing and demultiplexing means 13 includes a vote line multiplexing and demultiplexing section 13-1, a multiplexing section 13-2, and a demultiplexing section 13-3.
The separating unit 13-3 separates and processes the multiplexed communication signal input from the demodulating unit 12-2 and sends it from the slave station 4-1 via the information transmission channel (number 0). The first call channel allocation request information is output to the main control unit 14.

At this time, if at least one of the communication channels (No. 1) to (No. N) is vacant, the main control unit 14 allocates the first communication channel. and outputs the first communication channel allocation information to the multiplexing section 13-2, putting it on the information transmission channel (number 0), and transmitting the multiplexed communication signal to the modulation section 121, the antenna common section 12-4, and the antenna. Part 12-
3 to the slave station 4-1. The multiplexed communication signal sent from the master station 3 via the transmission path is received by the second transmitting/receiving means 17 of the slave station 4-1.

The multiplexed communication signals received and demodulated via the antenna section 17-3, the antenna common section 17-4, and the demodulation section 17-2 are separated and processed by the demultiplexing section 18-2, and are separated into information transmission channels (
The first call channel allocation information included in No. 0> is input to the slave station control section 19. The slave station control unit 19 of the slave station 4-1 that has received the first call channel allocation information is connected to the subscriber station connected to the calling terminal device 6-1 via the second subscriber line 5-1. The second demultiplexer 18 is controlled to connect the user interface section 16-1 to the assigned first communication channel (No. 1). That is, the signal of the first communication channel (No. 1) in the multiplexing section 18-1 and the demultiplexing section 18-2 is transmitted to the subscriber interface section 16.
-1 to input and output to the terminal device 6-1.

Further, the slave station control section 19 that has received the first call channel allocation information sends the first call channel allocation information to the terminal device 6-1 via the subscriber interface section 16-1 and the second subscriber line 5-1. A dial tone is sent to notify the subscriber that a calling channel has been assigned. In this state, the subscriber who requests a three-way call requests the three-way call using a special number or hooking, etc. The slave station control unit receives and receives the three-way call request signal via the call information detection unit 16-4. 19 sends the champion call request information, the second call channel allocation request information, and the third call channel allocation request information to the master station 3 via the already assigned first call channel (No. 1). The multiplexer 18-1 is controlled so as to. via the second transmitting/receiving means 17 of the slave station 4-1, the transmission path from the slave station 4-1 to the master station 3, and the first transmitting/receiving means 12 and first demultiplexing means 13 of the master station 3. The main control unit 14 receives the three-party call request information, the second call channel allocation request information, and the third call channel allocation request information, and then selects the three-way call request information, the second call channel allocation request information, and the third call channel allocation request information. If two call channels are available, a second call channel, for example, call channel (No. 5) and a third call channel, for example, call channel (K) are allocated, and the second call channel allocation information and The third call channel allocation information is output to the multiplexer 13-2. The multiplexing unit 13-2 multiplexes the second call channel allocation information and the third call channel allocation information so as to send them to the slave station via the first call channel (No. 1).

The main control unit 14 also directs the line concentration multiplexing and demultiplexing unit 13-1 to the first communication channel (1
Control is performed to separately process the call information of the second call channel (No. 5), and the third call channel (No. K). The line concentrator/demultiplexer 13-1 synthesizes the second call information of the second call channel (number 5) and the third call information of the third call channel (number K) to generate first composite call information. Generate and connect to the first call channel (No. 1) on the downlink frame configuration, and connect the third call information of the third call channel (No. K) and the first call information of the first call channel (No. 1). is combined to generate second composite call information, which is connected to the second call channel (No. 5) on the downlink frame configuration, and combines the first call information of the first call channel (No. 1) and the second call channel. (No. 5) is combined with the second call information to generate downlink third combined call information, which is connected to the third call channel (No. K) on the frame structure and multiplexed.

The second call channel allocation information and the third call channel allocation information are transmitted between the first demultiplexing means 13 and the first transmitting/receiving means 12 of the master station and the transmission path from the master station 3 to the slave station 4-1. The signal is input to the slave station control section 19 via the second transmitting/receiving means 17 and the second demultiplexing means 18 of the slave station 4-1. The slave station control section 19 that has received the second call channel allocation information connects the subscriber interface section 16-1 and the second call channel allocation information.
A first call destination from the subscriber that sends a second dial tone to the terminal device 6-1 via the subscriber line 5-1 of the subscriber to prompt the subscriber to dial the first call destination. The dial signal, which is connection information, is input to the slave station control unit 19 via the call information detection unit 16-4, and the slave station control unit 19 transfers the first call destination connection information to the already assigned first call channel. A subscriber interface that controls the multiplexing unit 18-1 to transmit the third dial tone to the master station 3 via the subscriber interface unit 16-1. The section 16-1 is the terminal device 6
- sends a third dial tone to 1 and sends a third dial tone to
prompts the destination to dial.

Thereafter, the second call destination connection information is also sent to the master station 3 via the first call channel (No. 1) through the same route as the first call destination connection information.

The first call destination connection information and the second call destination connection information sent from the slave station 4-1 via the first call channel (No. 1) are input to the main control unit 14 of the master station 3, and Control unit 14
outputs these destination connection information (dial signals) to the three-party destination connection information sending section 15. The three-party destination connection information sending section 15 sends destination connection information (dial signal) to the exchange 1 via the subscriber interface section 11-1. The exchange 1 calls the first destination terminal device and the second destination terminal device, and sends a ring tone to the terminal device 6-1.

On the other hand, the slave station to which the first and second called terminal devices that received the call belong requests a three-way call based on the incoming call information and three-way call request information sent from the parent station. A communication channel connection similar to that of the terminal device 6-1 is made.

(Effects of the Invention) As explained above, in the multi-way multiplex communication system of the present invention, the first call channel corresponding to the calling terminal device is allocated, and the first call channel is assigned in response to a three-party call request. A second communication channel and a third communication channel corresponding to each of the communication destination terminal device and the second communication destination terminal device are assigned, that is, three communication channels are allocated to communicate between the master station and the slave station. A communication line on the transmission path is secured, and at the master station, the call information of the second call channel and the call information of the third call channel are combined and connected to the first call channel, and the call information of the third call channel is combined. The call information and the call information of the first call channel are combined and connected to the second call channel, and the call information of the first call channel and the call information of the second call channel are combined and the call information of the second call channel is connected to the third call channel. By connecting to a communication channel, two-way simultaneous communication between three subscribers is possible, and the effect is that advanced service requirements can be met.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a master station in a multidirectional multiplex communication system according to an embodiment of the present invention, FIG. 2 is a block diagram of a slave station in a multidirectional multiplex communication system according to an embodiment of the present invention, and FIG. FIG. 4 is a diagram of call channel assignment on the frame structure of time division multiplex communication in an embodiment of the present invention; FIG. 5 is a diagram of the configuration of a conventional multi-directional multiplex communication system; FIG. 6 is a frame configuration diagram of conventional time division multiplex communication. 1... Switchboard, 2-1.2-2 ~2-9.
...First subscriber line, 3... Master station, 4-1
．． 42.4-3...Slave station, 5-1.5-2
．． ~5-9...Second subscriber line, 6-1.6
-2. ~6-9...Terminal device, 7-1.7-
2.7-3...Transmission line, 11...
First interface means, 11-1.11-2.
~11-M...Subscriber interface section, 1
2...First transmitting/receiving means, 12-1...
...Modulation section, 12-2...Demodulation section, 12-
3... Antenna section, 12-4... Antenna common section, 13... First multiplexing and demultiplexing means,
13-1... Concentration multiplexing/demultiplexing unit, 132.
...Multiplexing section, 13-3... Separation section,
14... Main control unit, 15... Three party destination connection information sending unit, 16... Second interface means, 16-1.16-2.16- 3...
...Subscriber ink face part, 16-4.16-
5.16-6...Call information detection unit, 17...
...Second transmitting/receiving means, 17-1...Modulation section, 17-2...Demodulation section, 17-3...
・Antenna section, 17-4...Antenna common section,
18...Second multiplexing and demultiplexing means, 18-1...
...Multiplexing section, 18-2... Separation section, 1
9...Slave station control unit. Agent: Patent Attorney Yoshihiro Yahata 1st station is 7th fake for each station of ST.
Qingdao District $, 3 Figure

Claims (1)

[Claims] Consists of one master station connected to the exchange via a first subscriber line, and one or more slave stations connected to one or more terminal devices via a second subscriber line. and one or more information transmission channels commonly used by each slave station for information transmission between the master station and the slave station, and allocated each time a call occurs to the terminal device by a demand assignment method. In a multi-directional multiplex communication system that performs communication by transmitting and receiving multiplexed communication signals consisting of a plurality of communication channels via a transmission path between the master station and the slave station, the master station one or more first subscriber interface means for processing signals input to and output from the exchange via the subscriber line; receiving the multiplexed communication signal sent by the slave station via the transmission path; a first receiving means for separating the multiplexed communication signal into a signal for the information transmission channel and a signal for the communication channel; Based on the communication channel allocation request information of No. 1, control is performed to allocate the first communication channel corresponding to the calling terminal device, and the three communication channels included in the signal of the first communication channel among the communication channels a second call channel corresponding to the first call destination terminal device and a second call destination terminal device based on the call request information, the second call channel allocation request information, and the third call channel allocation request information. call channel allocation control means for controlling the allocation of a corresponding third call channel; and transmitting first call destination connection information and second call destination connection information included in the signal of the first call channel to the exchange; three-party call destination connection information sending means for outputting to said first subscriber interface means for input into said call channel; separating and processing call information from said call channel signal and outputting said call information to said corresponding first subscriber interface means; call channel separation means for separating a second call from the first call information of the first call channel, the second call information of the second call channel, and the third call information of the third call channel; The information and the third call information are combined to create the first combined call information, and the third call information and the first call information are combined to create the second combined call information.
a call information synthesizing means for synthesizing synthesized call information and first call information and second call information to generate third synthesized call information; a call output from said exchange inputted from said first subscriber interface means; multiplexing the information into signals of the corresponding speech channels, and converting the first composite speech information into signals of the first speech channel and the second synthetic speech information into signals of the second speech channel; and speech channel multiplexing means for multiplexing the third composite speech information on the signal of the third speech channel; multiplexing the signal of the speech channel and the signal of the information transmission channel to perform multiplex communication. a first multiplexing means for generating a signal; and a first transmitting means for transmitting the multiplexed communication signal to the slave station via the transmission path; one or more second subscriber interface means for processing signals input to and output from the terminal device via the subscriber line; receiving the multiplexed communication signal sent by the master station via the transmission path; a second receiving means for separating the multiplexed communication signal into a signal of the information transmission channel and a signal of the communication channel; and a second receiving means for separating and processing the communication information from the signal of the communication channel; a second separating means for outputting to the second subscriber interface means; multiplexing the call information output from the terminal device inputted from the second subscriber interface means into a signal of the corresponding call channel; a second multiplexing means for multiplexing the speech channel signal and the information channel signal to generate a multiplexed communication signal; transmitting the multiplexed communication signal to the master station via the transmission path; control is performed to include the first call channel allocation request information in the signal of the information transmission channel based on the calling signal outputted by the terminal device and the second transmitting means outputted by the terminal device; A call channel allocation request that controls to include three-party call request information, second call channel allocation request information, and third call channel allocation request information in the signal of the first call channel based on the third party call request signal. control means; based on the first call destination connection signal and the second call destination connection signal output by the terminal device, the first call destination connection information and the second call destination connection information are transmitted to the first call destination; A multi-directional multiplex communication system comprising: a three-party call destination connection request control means for controlling inclusion in a channel signal.