JPS63228847A - Inter-node communication control system - Google Patents

Abstract

PURPOSE:To quickly perform inter-node communication while preventing the disturbance of communication of other nodes, by using successively a communication channel used for communication addressed to its own node to the communication addressed to another node from its own node via its own node transmission. CONSTITUTION:A multiplexing signal transmitted via a serial data signal line 18 is separated by a separating part 30 and signals corresponding to nodes are sent successively to a node detecting circuit 32. The signal addressed to its own node is taken in by the relevant node at the circuit 32 via a node logical part 34. The address signals applied to a transmission node controlling circuit 46 from the part 34 are coincident with those addresses except the address of its own node. As a result, a signal of a low level is applied to an AND gate 42 from the circuit 46 and therefore the signals except the signal of its own node are sent to a multiplexing circuit 52 from the circuit 32. These signals are multiplexed again and sent to the line 18.

Description

[Detailed Description of the Invention] (Requires $111) At a node that starts communication, the communication channel that is initially or previously used for the own node among the multiple communication channels transmitted by the own node. Processing is performed for temporary exclusive use of the node, and signals are transmitted to other nodes via the previously used communication channel, which is given the right to use only to that node.

[Industrial application field]

The present invention relates to an inter-node communication control system, and more specifically, to an inter-node communication control system that uses self-node transmission for communication channel exclusive processing.

Some communication systems are configured with distributed processing functions. In that system, each functional unit (node)
Communication between them is essential. Such communication is generally performed by setting up a plurality of communication channels between each node, and performing inter-node communication via one communication channel that is allowed to be exclusively used in chronological order between the nodes. Each arbitrary inter-node communication is performed using a communication channel that is allowed to be temporarily exclusive.

[Conventional technology]

The following two techniques are known for performing inter-node notification by exclusive use of such a communication channel.

The system configuration of these two techniques is shown in Figure 3.
Each node 101...signal transmitter 121 for each 10o
...12n, signal receiving sections 141...14n, and signal receiving/transmitting sections 161...16n are provided, and these signal receiving/transmitting sections 161...16□ are connected to each other via the serial data signal line 18. Each node 101...
10n can communicate with any other node. To this end, the signal receiving section of each node is configured to receive only signals to that node, and the signal transmitting section of each node is configured to transmit signals to all other nodes. . However, there is a difference between the two techniques described above in the configuration of the technical means that enable each node to communicate with any other node.

The communication channel exclusive technique in the first technique consists of detecting the availability of a communication channel, and notifying each other node that a node that enters inter-node communication via the communication channel is in communication. transmitting the information, and having each of the other nodes recognize it and not entering into communication via the communication channel, that is, causing the node currently communicating to temporarily monopolize the communication channel. It is something.

The communication channel exclusiveization technique in the second technique monopolizes the communication channel in a 1:1 relationship in the first technique, whereas all other communication channels (
N), i.e. 1:N
This is intended to create a state in which separate communication channels are allocated between each node and all other nodes, thereby achieving temporary exclusive use of communication channels.

[A problem that the invention attempts to solve]

In both of the communication channel exclusive techniques described above, the main purpose of this type of communication system is to avoid interfering with communication between nodes due to a node not declaring its release during inter-node communication. However, there are still problems to be solved in order to quickly start communication between nodes.

That is, in the first communication channel exclusive technique, a node attempting to start communication must perform the above-mentioned communication processing for recognition with respect to nodes other than the partner node, which requires extra steps. Therefore, the time required for this is wasted, and the start of inter-node communication is delayed accordingly.

This becomes a more serious problem as the frequency of inter-node communication increases, and the same type of problem also occurs when the number of nodes increases, either in addition to or in addition to this.

Further, in the second communication channel exclusive technique, the above-mentioned logic must be provided, but it has a complicated configuration and the processing thereof takes time. This also causes the same kind of problems as the first communication channel exclusiveization technique.

The present invention was created in view of such problems, and an object of the present invention is to provide an inter-node communication control system that can quickly perform the original communication between nodes.

[Means for solving problems]

FIG. 1 shows a block diagram of the principle of the present invention. In this figure, numeral 10 indicates one node representing each node in a communication system in which a plurality of nodes exchange signals via a plurality of communication channels. Reference numeral 2 denotes a communication end detection means for detecting the end of communication addressed to the own node. Reference numeral 6 denotes a self-node transmitting means for performing self-node communication. Reference numeral 8 denotes another node transmitting means that transmits a signal to the other node via the own node transmission channel after the own node transmission by the own node transmitting means 6 is detected by the communication end detection means 4. The present invention is configured to use these means to take over and use the communication channel addressed to the own node that was initially or previously used for communication from the own node to the conversion node.

[For production]

When the end of the initial or previous communication addressed to the own node is detected by the communication end detection means 2, if there is transmission data, the own node automatically transmits the data via the communication channel where the communication ended. This is done by the node transmitting means 6. In response to the fact that the own node transmission is detected by the communication end detection means 2, that is, the temporary exclusive use processing of the communication channel is completed, the own node transmits the transmission from the own node to the required network node via the other node transmitting means 8. Let's do it.

By using such a communication channel takeover method, inter-node communication can be performed quickly while preventing communication interference from network nodes.

〔Example〕

FIG. 2 shows an embodiment of the invention. This figure represents one node among the plurality of nodes shown in FIG. 1, and the node configuration consists of the following components.

Reference numeral 30 denotes a separation section connected to the serial data signal line 18, and the signals corresponding to each node separated here are sequentially sent to the node detection circuit 32. 34 receives a signal addressed to the own node detected by the node detection circuit 32 and connects signal lines 36 and 38.
．． This is a node logic unit that sends out address signals, data to the other node, and data for transmission to the own node in accordance with the 40-compatible node. Signals other than the own node detected by the node detection circuit 32 are connected to the signal input of the AND gate 42 .

Signal line 36 is connected to a transmit node control circuit 46 whose output is connected to an inverting gate control input of AND gate 42 and a gate control input of AND gate 48 . Send data signal line 3 to the signal input of AND gate 48
8 are connected.

The output of AND gate 48 is connected to multiplexing circuit 52. The signal line 40 is connected to a self-node transmission circuit 54, and a signal for transmission from the own node is sent from the circuit 54 to a multiplexing circuit 52.
give to The output of multiplexing circuit 52 is connected to serial data signal line 18.

In this node configuration, the self-node detection circuit 32 and the node logic section 34 represent the configuration example of the communication end detection means 2 shown in FIG. An example of the configuration of the self-node transmitting means 6 shown in FIG. An example of the configuration of means 8 is shown.

The operation of the communication system configured as described above will be explained below.

The multiplexed signal transmitted via the serial data signal line 18 is separated by the demultiplexer 30, and the signals corresponding to the nodes are sequentially sent to the node detection circuit 32, where the signals addressed to the own node are sent to the node logic part 34. is captured at that node via . Since the address signals given from the node logic section 34 to the sending node control circuit 46 are addresses other than those of the own node, a low level signal is given from the sending node control circuit 16 to the AND gate 42. , signals from the node detection circuit 32 other than the own node are sent to the multiplexing circuit 52 via the AND gate 42, and these signals are multiplexed again and sent to the serial data signal line 1.

As described above, the signal addressed to the own node initially or previously sent from the conversion node is taken in by the own node, and the completion of the taking in is recognized by the own node logic unit 34. If there is transmission data from the own node to another node at that time, the own node logic unit 34 sends the transmitted data addressed to the own node to the own node transmission circuit 54 via the signal line 40 prior to the transmission. Send. The circuit 54 converts the transmission data into a data signal in a format suitable for multiplex transmission and transmits it to its own node via the multiplexing circuit 52. The circuit 54 converts the transmission data into a data signal in a format suitable for multiplex transmission and transmits it to its own node via the multiplexing circuit 52. The self-node transmission data signal is received at the self-node in the same manner as the reception of signals addressed to the self-node other than the self-node transmission. In this way, the process of exclusive use of the channel by the own node is completed.

After that, the node logic 171134 gives the address of the destination node to the sending node control circuit 46, and sends data to the signal line 38 to be transmitted to the destination node via the dedicated channel (own node transmission channel). Send to. Since the transmission node control circuit 4G outputs a gate control signal during the time corresponding to the dedicated channel, the data on the signal line 38 is multiplexed with the channel data from the AND gate 42 in the multiplexing circuit 52. and is transmitted onto the serial data signal line 18.

In the above embodiment, the transmission medium is an electric conductor, but the present invention can be extended to a wireless system. Furthermore, the end of communication between self-node transmission and transmission from other nodes may be configured separately.

〔Effect of the invention〕

As described above, according to the present invention, by adopting a technique in which the communication channel used for communication addressed to the own node is taken over and used for communication from the own node to the made node via own node transmission, the communication from the made node is Communication between nodes can be performed quickly while preventing communication interference.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a diagram showing an embodiment of the present invention, and FIG. 3 is a diagram showing an example of a conventional system configuration. 1 and 2, reference numeral 2 indicates communication end detection means (self-node detection circuit 32 and node logic unit 34), and reference numeral 6 indicates own-node transmission means (node logic unit 34, own-node transmission circuit 54, and multiplexing circuit). 52), 8 is another node transmission means (node logic unit 34, transmission node control circuit 46, AND gate 48, and multiplexing circuit 52), and 10 is a node. Ni'F-& Rotshi if! i-yo1-p ”D...Tsukuni 1) Figure 1

Claims (1)

[Claims] In a communication system that performs inter-node communication via a plurality of communication channels, each node is provided with communication end detection means (2) for detecting the end of communication addressed to its own node.
), self-node transmitting means (6) for performing self-node transmission, and transmission from the self-node to the other node via the self-node transmission channel in response to the self-node communication end detection by the communication end detection means (2). Other node transmitting means (8
) to perform inter-node communication.