JPS62284543A - Multiple address communication system - Google Patents

Abstract

PURPOSE:To easily carry out a multiple address communication by allowing subscribers who desire to have a multiple address communication and are not always many among all subscribers to utilize the functions of a composite communication terminal. CONSTITUTION:A terminal 2 sets information on a list of terminals 1a-1n to which communication contents are to be sent together with the communication contents, and transmits them to a terminal 1a, and the contents are received by the terminal 1a from a channel 4a through a switching network 3 and stored in a buffer memory circuit 6 temporarily through a circuit corresponding circuit 5. A terminal control part 8 displays or sends out the communication contents on the buffer memory 6 to a printing device 7 and information on its terminal 1a which is entered in the list information on the terminals is deleted. Then a terminal control part 8 recognizes a terminal 1b to which the communication contents are to be sent next and controls a circuit corresponding part 5 to transmits the contents held on the buffer memory circuit 6 to the terminal 1b from a channel 4x. The terminal 1b performs the same control with the terminal 1a and transmits the contents to a next terminal. Thus, the communication contents is sent to a terminal 1n.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a broadcast communication system for transmitting the same communication content to a plurality of receiving terminals.

[Conventional technology]

Conventionally, when attempting to realize broadcast communication in a public switched network such as a facsimile network, it has been necessary to add a device for dividing and transferring one communication content to a subscriber exchange or a relay exchange that accommodates terminals. For this reason, administrators of public switched networks are forced to install network equipment at each switch, etc., and coupled with the enormous amount of equipment required, it is difficult to make broadcast communications possible over long periods of time in all service areas. There was a possibility that this would result in a problem that would take time and further increase the charges for communications handled by the exchange network. Furthermore, from the perspective of many subscribers who do not necessarily desire broadcast communications, unnecessary equipment within the exchange network would simply increase, and there was a risk that the service would lack fairness.

[Problem that the invention seeks to solve]

The increasing sophistication and digitization of services in public communication networks is becoming a trend of the times, and in the near future there will be complex communication terminals that have multiple logical information transmission channels and can use multiple channels at the same time. , it is inevitable that it will be commonly used.

At that time, if the above-mentioned conventional technology were used to achieve broadcast communication, the functions of the composite communication terminal would not be fully utilized, and the switching network would have to have extra equipment for broadcast communication. It may not be possible to reduce communication costs.

The purpose of the present invention is to make it possible for those who wish to receive broadcast communications, which is not necessarily expected to be a large number of all subscribers, to easily utilize the functions of multiple communication terminals, even when digital public switched networks are introduced in the future. Realizing broadcast communication also means providing a service that is efficient from the perspective of other subscribers.

[Means for solving problems]

The present invention provides a communication network that accommodates a complex communication terminal that has a plurality of information transmission logical channels for transmitting and receiving communication contents and can use the channels multiple times, and is capable of receiving communication contents for the first time. If the received communication is put on hold or notified to the recipient on the terminal, it will be N.
In addition, the received communication content is retransmitted to another composite communication terminal using an information transmission logical channel other than the information transmission logical channel used for receiving the call, and the retransmitted communication content is then received. By repeating similar operations at the composite communication terminals if necessary, m number of composite communication terminals are made to sequentially receive the same communication content, thereby realizing broadcast communication.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows a schematic configuration of a communication network targeted by the present invention.

18 to 1n are composite communication terminals that have multiple information transmission logical channels for transmitting and receiving communication contents and can use multiple channels at the same time. 2 is a general communication terminal that can use only one information transmission logical channel at a time for sending and receiving communication contents, and here it is assumed that it operates as a transmitting terminal. 3 is a terminal of these types. 1a-1n
It is a digital switching network made up of equipment including switching equipment that accommodates

FIG. 1 shows a block diagram of an embodiment of a composite communication terminal device. In FIG. 1, 4a represents an information transmission logical channel used for incoming calls, and 4x represents one of the information transmission logical channels other than 4a. 5 is a line compatible circuit on the terminal side, which performs electrical matching of digital signals with the subscriber exchange. 6 is a buffer memory circuit, which is a temporary storage location for received information. Reference numeral 7 denotes a display or printing device, which is composed of a CRT display, a kanji printer, etc., and transmits the received communication contents to the terminal user. 8 is a terminal control unit, which is composed of a control circuit such as a microprocessor and a terminal control program that operates on the control circuit. One of these terminal control programs is a program that implements the broadcast communication control of the present invention.

Hereinafter, a case will be described in which the same communication content is delivered from the terminal 2 to the terminals 1a to 1n.

Terminal 2 sets list information specifying the terminals 1a to 1n to which the communication content should be delivered, together with the communication content, and sends the communication content and this list information together or separately to terminal 1.
Send to a. The transmitted communication content and the list information of the terminals to which the communication content should be transmitted enter the terminal 1a from the channel 4a via the exchange network 3, pass through the circuit corresponding circuit 5, and are temporarily held in the buffer memory circuit 6. . When the terminal control unit 8 displays or sends the communication content on the buffer memory circuit G to the printing device 7, it also displays its own terminal information listed in the list information of the terminals that deliver one communication content, that is, the information of the terminal 1a. Next, the terminal control unit 8 recognizes, for example, the terminal 1b as the next terminal to which the communication content should be delivered from the terminal list information left on the buffer memory circuit 6, and controls the one-line compatible circuit 5. Then, the communication contents held on the buffer memory circuit 6 and the list information of the terminals to which the communication contents are to be delivered are transmitted from the channel 4x to the terminal 1b.

In the terminal 1b, the same control as in the terminal 1a is performed,
Communication contents and list information of terminals transmitting the communication contents (
The remaining list information (from which own terminal information has been removed) is sent to the next terminal. In this way, the communication content is transferred to terminal 1n.
reach up to. Terminal bag [1n's terminal control unit 8 determines that there is no need to send the communication content to the next terminal because no terminal information remains in the list of terminals to which one communication content is to be sent, and stores the communication content in the buffer memory circuit. The communication content held in 6 is simply displayed or output to printing device 7.

As described above, broadcast communication can be realized only by the functions of the terminals 1a to 1n. In addition, in this embodiment, since the purpose is to deliver the communication content transmitted by the terminal 2 to the terminals 1a to 1n, it is only necessary to set up the line in the down direction from the terminal 2, and from the terminal 1n to the terminal 1n. It is not an essential condition to set up an uplink to 2.

〔Effect of the invention〕

As explained above, according to the present invention, by repeating the operation of retransferring the information to the next terminal at the terminal that received the information, the exchange is not equipped with any equipment for broadcast communication. There is an advantage that one broadcast communication can be realized without any trouble.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of a terminal device according to the present invention, and FIG. 2 is a diagram showing an example of the configuration of a digital switching network to which the present invention is applied. 1a to 1n... Composite communication terminal, 2... Calling terminal. 3... Digital switching network, 4a, 4x... Information transmission logical channel, 5... Line corresponding circuit on the terminal side, 6
. . . Buffer memory circuit, 7. Display or printing device, 8. Terminal control unit. 2nd figure 3t

Claims (1)

[Claims] (1) In a communication network that accommodates a complex communication terminal that has a plurality of information transmission logical channels for transmitting and receiving communication contents and can use the plurality of logical channels simultaneously, the complex communication terminal When receiving terminal information that broadcasts the communication content, it outputs the communication content and removes the received communication content and own terminal information using a channel other than the information transmission logical channel used for receiving the call. A broadcast communication method characterized by transmitting the information to the next composite communication terminal.