JPS6365750A - Network management procedure for communication system - Google Patents

Abstract

PURPOSE:To easily detect a route change in a slave station by sending the code of a route information pattern in use periodically from a master station to the slave station. CONSTITUTION:The master station 0 stores all route information patterns. Slave stations 1-6 load and store the route information pattern in use from the master station 0 at system start. The master station 0 sends a route information code in use at present to the slave station periodically. The slave station compares the code sent from the master station with the code of said route information pattern stored in advance and when they are coincident, the communication is continued in the route information. In case of the dissidence, when the code sent from the master station is received as the identical code for plural number of times, it is discriminated that the route is changed to that shown in the code. When its own station does not store its code, the sending of route information is requested to the master station.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a network management procedure for a communication system.

[Conventional technology]

FIG. 8 shows an example of the network configuration of the TS (g system), where (0) represents the master station and (1) to (5) represent the slave stations.

Next, the operation f will be explained. In the network I shown in Figure 3, the master station (0) (here, one route information is set and stored, and the slave stations load and store the route information from the master station when the system is started). .Each station performs data communication according to this route information.

[Problem that the invention seeks to solve]

In such systems, consistency between the route information possessed by each station is extremely important, but in conventional methods, once the information exchange has finished and communication has begun, there may be some inconsistency due to some condition. Even if it occurs.

There was no way to detect or recover.

This invention was made in order to solve the above-mentioned problems, and provides a communication system in which slave stations can detect inconsistencies in route information and can easily recover route information within the network. The purpose is to obtain.

[Means for Solving Problem 8] In this communication system, the master station periodically determines whether the master station is using the route information of T and T for the slave station fζ.
This is what is sent.

[Effect]

In the communication system according to the present invention, the slave station compares the received route information with the information used by its own station, detects a discrepancy in information, and requests the master station to transmit the route information.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1ζ.

FIG. 1 shows an example of the network configuration of one communication system. In FIG. 1, (0) represents a master station, and (l) to (5) represent slave stations. Solid lines indicate currently used routes, and dotted lines indicate available routes. For the main station.

Route information patterns ■ to ■ are prepared.

FIG. 2 is an example of route information code transmission.

Next, the operation will be explained. In the network shown in FIG. 1, the main station (0) stores all the route patterns shown in FIG. The slave station loads and stores the pattern used at system startup from the master station. The route information pattern is coded O. The master station periodically transmits the currently used route information code to the slave stations. The slave station compares the first code transmitted by the master station with the code it stores, and if they match, it continues communication using that route information. If there is no match, if you receive the same code multiple times.

The route indicated by the code (it is determined that this route has been changed), but if the local station does not have that code stored, it sends the code and requests the master station to send route information. When the station receives the code, it sends route information corresponding to the code to the slave station.When the slave station receives the route information, the station sends route information corresponding to the code to the slave station.

According to that information, the route is changed and the code is stored.

In addition, in the above embodiment, the decision to change the route is made.

Assume that different patterns are received 8 times in succession.

The number of times the determination is made may be set depending on the operating rate, importance, etc. of the system to be applied.

〔Effect of the invention〕

As described above, according to the present invention, the master station periodically transmits the code of the route information pattern that it is using to the slave station, so that the slave station can easily detect a route change and perform the recovery process. can be done.

[Brief explanation of the drawing]

FIG. 1 is a network configuration diagram according to an embodiment fζ of the present invention, FIG. 2 is a diagram showing an example of route information code transmission, and FIG.
The figure is a conventional network configuration diagram. In the figure, (0) represents the main station, (1) to (5) represent the slave stations, and ■
~ ■ indicates a route information pattern.

Claims (1)

[Claims] In a system in which a main station and one or more slave stations that follow the main station communicate with each other, the system has a function to change the route based on multiple pieces of route information stored in each station,
Communication characterized by periodically transmitting information on which route to use from the master station to the slave station, comparing and determining the information received by the slave station multiple times, and switching the route based on the results. System network management procedures.