JPS63160446A - Network management method for communication system - Google Patents

Abstract

PURPOSE:To easily detect route change by a slave station and to attain recovery processing by sending a code of route information pattern used by a master station periodically to the slave station. CONSTITUTION:A master station 0 sends a code of route information used at present periodically to slave stations 1-5. The slave station 1-5 collate the route information code received fro, the station 0 with the code used by its own station and when they are coincident, the communication is continued by using the route information. If dissidence is detected consecutively three times, it is discriminated that route information is changed and the route information code of its own station is sent to the master station 0. When the code received from the slave stations 1-5 is not coincident with the route information set by the master station 0, the route information pattern set by the station 0 is sent to the stations 1-5. The stations 1-5 change the information into the route information pattern received from the master station 0 and make communication by using new route information.

Description

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

[Conventional technology]

Figure wi3 is an example of the network configuration of a conventional communication system. In Figure 1, (0) is the main station, and C1) to (5)
represents a subordinate station.

Next, the operation will be explained. In a network like the one shown in Figure 3, one route information is set for the main station (0).
The slave stations (1) to (5) load and store the information from the master station (0) when the system is started. Each station communicates according to this route information.

[Problem that the invention seeks to solve]

In such a system, it is very important to match the route information held by each station, but in the conventional method, once the route is set by exchanging route information and communication is started, some kind of There is a drawback that even if an inconsistency occurs in the conditions, it cannot be detected and recovered.

This invention was made 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 in the network. The purpose is to

[Means for solving the problem] In the communication system according to the present invention, the master station periodically transmits to the slave station which route information is being used,
The slave station receives the route information, compares it with the route information used by its own station, and switches the communication route according to the result of the comparison.

[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, and if a mismatch is detected, it receives the correct route information from the master station and updates the new route information to the base. and communicate.

[Embodiment of the Invention] An embodiment of the invention will be described below with reference to the drawings. 1st
The figure is an example of the network configuration of 1 communication system.
In the figure, (0) represents the main station, (1) to (5) represent the slave stations, the solid line represents the currently used route, and the one-dot line represents the usable route. A route information pattern Φ-〇 is prepared for the main station (0).

FIG. 2 is an example of transmission of the route information code in FIG. 1.

Next, the operation will be explained.

In a network like @1 cause, the master station (C)) memorizes all the route information patterns of ) and store it. A route information code is attached to the route information pattern.

The master station 10) periodically transmits the currently used route information code to the slave stations (1) to r5). Follower (
In steps 1) to (6), the route information code received from the main station (()) is checked against the code used by the own station, and if they match, communication is continued using that route information.

Next, when a mismatch is detected three times in a row, it is determined that a change in route information has occurred, and the route information code of the own station is transmitted to the master station (0). At the master station (0), the slave stations (11~
(5) If the code received from power 1 does not match the route information f set by master station +01, send the route information pattern set by master station (0) to slave stations (1) to (5). The slave stations (1) to (5) change the route information to the route information pattern received from the master station (0) and perform communication using the new route information.

If the slave stations C1) to (I5) do not continuously detect a code mismatch, or if the codes received from the master station (01 is the slave station C1) to (5) match, it is considered a transmission error.

No recovery processing is performed.

In the above embodiment, the route change is determined when different codes are received three times in a row.

The number of times the determination is made may be set depending on the importance of the operating rate 1 of the system to which it is applied.

[Effects of the Invention] As described above, according to the present invention, since the code of the route information pattern used by the master station is periodically transmitted to the slave station, the slave station can easily detect a change in the route. 1 recovery processing can be performed.

[Brief explanation of the drawing]

@11ffl is a network configuration diagram according to an embodiment of the present invention, FIG. 2 is an operation explanatory diagram showing an example of transmitting the route information code in FIG. 1 and 8, and @3 is a conventional network configuration diagram. In the figure, (0) represents the master station, and (1) to (5) represent the slave stations. ■~O represent route information patterns. Identical calls in Figure 31 indicate the same or equivalent parts.

Claims (2)

[Claims] (1) In a communication system in which a master station and one or more slave stations that follow the master station communicate with each other, each station has a function to change the route based on multiple pieces of route information stored in it, and which route is selected. Route information to be used is periodically transmitted from the master station to the slave station, the information received by the slave station is compared with the route information used by the own station, and if the comparison results do not match, the communication route is switched. A network management method for a communication system, characterized in that: (2) The scope of claims characterized in that, if the comparison result of the route information periodically transmitted from the main station and the route information used by the own station does not match multiple times in a row, the communication route is switched. A network management method for a communication system according to item 1.