JPS61262336A - Multiple address communication system - Google Patents

Abstract

PURPOSE:To improve the efficiency of a transmission line by providing respectively a frame sending means to a terminal equipment being a sender, a means for multiple address communication discrimination, an information transmission, and write and transfer to each communication equipment and an ACK/NACK request discriminating means to the communication equipment for the terminal equipment being the sender and transmitting/receiving the information so as to use the same kind of terminal equipment for the application of the multiple address communication. CONSTITUTION:A communication equipment 13 being a sender sending a data while describing multiple address communication as a type code uses a write means to write a code representing the ACK/NACK signal request as the type code after a prescribed time and sends the result to a transmission line 12. Communication equipments 11a, 11d write the ACK/NACK code as an ACK/NACK signal code when the ACK/NACK signal is requested based on type code in a received frame and uses a transfer means to transfer the result to the next communication equipment. The communication equipment 13 corresponding to the sender terminal equipment uses an ACK/ANCK request discrimination means to discriminate the ACL/NACK signal code when the type code represents the ACK/NACK signal request and applies multiple address communication by sending the reply signal of a reception terminal equipment 16 to the sender terminal equipment 14 as a single reply signal.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a broadcast communication system for transmitting the same information in a communication system in which a plurality of various terminals, such as facsimile machines, are connected. It is.

[Conventional technology]

FIG. 4 is a block diagram of a conventional broadcast communication system disclosed in Japanese Patent Publication No. 5B-51462.

In the figure, 0m is a transmitting side communication device, 2) is a sending terminal such as a facsimile, % (b) is a receiving side communication device, and (to) is a receiving terminal such as a facsimile. a is a data converter for transmitting transmission data according to a certain format; 11 is a signal type determiner for determining the type of received data; and 11 is a signal type determiner for determining the type of received data. ACK signal processor, (2) is a CK signal generator for passing an ACK signal to the transmitting terminal. (1111 is a data inverse converter installed in the receiving side communication device (b), and when a signal addressed to the own station comes into the above communication device), the data is transmitted to the receiving side terminal (b). It is for passing.

Next, the operation of the above configuration will be explained.

The data sent from the transmitting terminal (b) is added with various control signals by the data converter α of the transmitting communication device QIX), and is converted into a transmission output signal. This transmission output signal of the transmitting side communication device OQ is sent to the receiving side control device (B).
is input. The received input signal is first judged by the signal type determiner (G) as a signal addressed to the own station, a signal addressed to another station, a broadcast signal, an ACK signal, etc., based on the type code and destination address. The signals taken in, addressed to other stations, and the ACK signal are immediately sent out again to the transmission path to the next terminal. In the case of broadcast communication, the signal is taken in as a signal addressed to the own station, and at the same time is sent out again to the transmission path as a signal addressed to another station.

From the signal addressed to the own station, only the data signal () is extracted by the data inversion circuit (transfer) and received by the receiving terminal (to). At the receiving terminal (to), a message indicating completion of reception is displayed.
゛The signal is output. The data conversion circuit (b) adds a control signal to create an ACIC signal, and sends the ACK signal to the transmission path to the transmission side control device 011.0 In the transmission side communication device θ mark, the signal type is Judgment device (G)
The ACK signal processor (2) receives the ACK signal and stores it together with the address of the receiving terminal that sent it. When ACK signals are returned from all communication terminals and reception is complete, an ACK signal generator generates a CK signal and sends it to the transmitting terminal. As a result, the next data is sent from the transmitting terminal σ to the receiving terminal (towards) again in the same procedure.

[Problem that the invention seeks to solve]

Since the conventional broadcast communication system is configured as described above, each communication device used in the system receives the broadcast signal asynchronously from other communication devices, and receives the broadcast signal from the terminal of each communication device and the CK signal issued by the terminal of each communication device. However, there is a problem in that it is difficult to process ACK signals received from other communication devices.

This invention was made in order to solve the above-mentioned problems, and it is possible to ensure reliable ACVNA in the transmitting side communication device.
The object of the present invention is to obtain a relay communication system that can collect and monitor cK, and also eliminates the need for the receiving side communication device to send back MCK, taking into consideration the operation of other communication devices.

[Means for solving problems]

In the broadcast communication system according to the present invention, a terminal serving as a transmitting source has a frame sending means, each communication device has a broadcast communication determining means, an information transmitting means, a writing means, and a transfer means, and the communication device of the terminal serving as a transmitting source has a frame transmitting means. [Operation] The transmitting terminal uses the frame transmitting means to determine the type code indicating the type of information, the receiving terminal address, the transmitting terminal address, and the ACK/HACx signal code. , a frame including a data number and data is transmitted to a transmission path, and each communication device receives the frame, uses a broadcast communication control means to determine whether or not it is broadcast communication based on the type code, and transmits a frame including a data number and data to a transmission path. When it is an information communication, the signal is imported into the own communication device and transferred to the next communication device, while if the received destination terminal address matches the accommodated terminal address, the signal is sent to the information transmitting means. Send information to the appropriate device.

After a certain period of time, the transmission source communication device that sent the data as a broadcast communication writes a code indicating an ACK/'NACK signal request in the type code using a writing means, and sends it to the transmission path. Based on the type code of the received frame, each communication device sends an ACK/'HACK signal to the ACK, △ACK signal code when requesting an ACKJACK signal.
After writing the code, the transfer means transfers it to the next communication device. The communication device corresponding to the source terminal sends ACK
/'NACK The request determination means determines that the type code is AC.
V'NACK ACK/N ACIC when requesting signal
Determines the signal code and returns the return signals from all receiving terminals.
Broadcast communication is performed by sending a single return signal back to the source terminal.

〔Example〕

FIG. 1 is a block diagram showing the configuration of an embodiment of the relay communication system of the present invention.
lld) is a terminal, (10a) to (10d) are communication devices,
(10ct) is a transmission path that connects the communication devices (10a) to (10ct) in a ring shape.

FIG. 2 is a block diagram showing an example of a specific configuration of each station in the broadcast communication system of the present invention.

0@ is the sending side communication device, - is the sending side terminal, ni) is the receiving side communication device, α6) is the receiving side terminal, v) is sending, sending the data output from (16) to the receiving side terminal bQE9 is a data converter that converts the input signal into an output, and the signal type determiner determines the type of the received input signal.
The ACK signal processor at the time of a NACK signal request is an ACK signal generator for returning an ACK signal to the transmitting terminal 1114j. Further, (IJI is a data inverse converter that restores the data converted by the data converter (b).

FIG. 3 shows one format of signals communicated and received in the communication device of FIG. 2 (9).

(3b) is a synchronization flag, (4) is a type code,
Of these, (4a) is broadcast communication, and (4b) is ACVHA.
CK No. 4 request or ACK/NACK signal, (4a)
is the specific station complete signal.

In addition, (6) is the destination terminal address, (6) is the destination terminal address, (7) is the ACK/MACK signal code,
(6) is a data number, and (9) is data.

Next, the operation of the above configuration will be explained.

Now, a case will be described in which the terminal (11a) in FIG. 1 becomes a transmitting terminal and performs broadcast communication to other terminals (11b)*(11c), (111)K. The information sent from the terminal (11a) includes control information such as the one shown in FIG. 3 in addition to data. Information X is sent from the terminal (11a) to the communication device (tab) via the communication device (10a) and through the transmission path (2). The communication device (10b) determines the type of information, destination, etc. from the control information of the sent information At the same time, information x1 is transferred to the next communication device (1OC). At this time, if the terminal (11b) is not designated as a receiving terminal, the communication device (10b) immediately sends the information to the next communication device (10c) without importing the data to its own terminal (11b). Transfer. Communication device(
10c), the information X engineer similarly uses his own terminal (11
a) Determine whether or not the address is addressed to the device, and import it into the own terminal (11a), or send it to the next communication device (1O) without importing it.
Transfer to a). In this way, information X□ is sequentially transferred to the last terminal (11d) and then transferred to the original communication device
Return to 0a).

After the information X of the broadcast communication returns, the communication device (10a) waits for a certain period of time and then sends ACK/'NAL'.
The signal request information x2 is sent to the next communication device (IC1b) (
Issue C.

The communication device (10b) that lost the ACK7NACK signal request information x2 checks whether there was a MuCIC signal from the terminal (11b), adds the ACV'MACK signal code to the information communication device (10c)
Transfer to. The communication device (10c) also performs the same operation as 1.
Transfer to the next communication device (10d). In this way,
The AC1□ACK signal from each destination terminal is returned to the source communication device (10a).

At this time, each destination terminal (11b), (11c), (1
When there is a NACK signal in ta), the source communication device (10a) sends ACK7/N once again or multiple times.
The information X of the ACK signal request is sent to the communication device (10b) via the transmission path (2).

(10a) and (10a). When all ACK signals from each receiving terminal are received by the source communication device (10a), a MuCIC signal is sent to the transmitting terminal (11a). The transmitting terminal (11a) thereby knows that information x2 has been received by all the necessary terminals, and transmits the next information X in the same procedure, and broadcast communication is performed in the same manner.

Next, signal processing in each communication device will be described in detail.

First, the transmission output of the communication device Qll) is input to the receiving side communication device (B) via the transmission path (2) as described above.

This reception input is determined by the type code (4) in the signal type determiner (g) as broadcast communication (4a), ACVNACK, etc.
A signal request (4b) and a signal addressed to a specific station (4Q)% are determined, the signal addressed to the own station is taken in, and the signal addressed to another station is immediately applied to the next communication device and sent out again to the transmission path.

In the case of broadcast communication (4a), the ACL
/'HACK signal request (41))+7), AC
Immediately after the K/NACK information is written into the ACK/NACK signal code (a), it is sent out to the transmission path again.

The signal addressed to the local station is sent to the data inverter (transformer).
Only the data signal is extracted and received by the receiving terminal. When the reception ends at the receiving terminal (to), an ACK signal indicating the completion of reception is output.0 This person's CK signal is
' When information with type code (4) including ACK/NACK signal request (4b) is received, an ACK code is added and sent to communication device A on the transmitting side.

In the transmitting side communication device α, the signal type is determined in the signal type determiner (to), and in the case of repeat communication, after a certain period of time, it sends out AC□ACK signal request information and AC
If there is a K/NACK signal request, go to ACK signal signal processing) to determine the ACV''NACK signal, and if there is at least one NACK signal from each receiving terminal α~, information indicating an ACV/NACK signal request is sent again. Send and ACK
In the case of a signal, the ACK signal generator outputs an ACK signal to the transmitting terminal (0), thereby causing the next data to be sent out again in the same sequence (to the transmitting terminal).

Note that in the above embodiment, the AC]□ACK signal code (γ) from each terminal is not specified, but the
(1! Even if you prepare the V'NACK signal code (γ),
Also.

The type code (4) from the transmitting side communication device CK is ACKed.
/'NACK signal request (41)), ACK7'N
ACK An ACK code is written in the signal code (γ), the information is sent, and the receiving communication device (15) receives the information.When the ACK signal is returned from the receiving terminal α6), , transfer it as is to the next communication device, and
If the CK signal is not returned, ACK/NACK
A NACK signal code may be written in the signal code (γ) and passed to the next communication device.

In addition, in the above embodiment, ACK/
Although the NACK signal return method has been described, the type code (
When 4) is a signal addressed to a specific station (4C), the transmitting side communication device (
Without waiting for the AC
), it is also possible to return an ACK code.

〔Effect of the invention〕

As described above, according to the broadcast communication system of the present invention, the broadcast communication system that was realized by a communication processing system that was either impossible or extremely uneconomical depending on the terminals of the conventional broadcast communication system can be achieved. Communication can be performed using the same type of terminal, and the efficiency of the transmission path can be improved while taking into consideration the avoidance of data collisions on the transmission path, the load on the communication equipment, etc. It has excellent effects such as:

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a configuration of a relay communication system according to an embodiment of the present invention, FIG. 2 is a block diagram showing an example of a specific configuration of a communication device of each station according to the present invention, and FIG. Explanatory diagram showing one form of a signal processed by
The figure is a block diagram showing a specific configuration of a communication device of each station in a conventional broadcast communication system. In the figure, (4) is the type code, (4a) is the broadcast communication, and (4b) is the ACK7'NACK signal request or ACK.
/NAC! (4C) is a signal addressed to a specific station, (γ) is an ACK7NACK signal code, (10a), (10b)
, (10c), (10d) are communication devices, (11a). (11b), (11c), and (11d) are terminals, aa is a transmission path, oat is a transmission side communication device, σ is a transmission side terminal,
(b) is the receiving side communication device, (to) is the receiving side terminal, αη is the data converter, (to) is the signal type judger, H is the ACK signal signal processing b) is the ACK signal generator % (El) is the data inverter. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] Communication devices accommodating terminals configured to perform one-to-one communication are connected in a loop through a transmission path, and the terminals that receive information via the communication devices return the information to the terminal that sent the information. In a broadcast communication system that transmits signals between terminals by sending back signals, the communication device of the transmitting terminal has a type code indicating the type of information, a receiving terminal address, a transmitting terminal address, an ACK/NACK signal code, It has a frame sending means that sends a frame including a data number and data to a transmission path, and the communication device of the receiving terminal receives the frame sent by this frame sending means and performs broadcast communication according to the type code. When it is determined that there is a broadcast communication, a broadcast communication determination means that captures the signal into its own communication device and transfers the signal to the next communication device connected in a loop, and a receiver terminal address of the signal captured into its own communication device; If it matches the stored terminal address, an information transmitting means transmits the information to the corresponding terminal, and if it is determined to be an ACK/NACK signal request based on the type code, an ACK/NAK signal code is sent to the ACK/NACK signal code.
ACK/ACK that writes the CK code and transfers it to the next communication device.
NACK writing means and transfer means, the communication device of the transmission source terminal determines an ACK/NACK signal code when the type code is an ACK/NACK signal request;
1. A broadcast communication system comprising: ACK/NACK request determining means for transmitting return signals from all receiving terminals to the source terminal as a single return signal.