A method and system for judging mvb work master station equipment

Abstract

The present invention provides a method and system for judging MVB working master station equipment. The method includes: calculating the threshold parameter D from slave station device i to bus logic port j, wherein i>0, j>0; detecting slave station device i The master-slave frame delay T to the bus logical port j; compare the master-slave frame delay T with the threshold parameter D; if T≥D, then determine that the currently used master device is master device A; if T<D , then it is determined that the currently used master device is master device B. The present invention aims at bus topology structures where MVB master stations are in different network segments, and fully utilizes the delay characteristics of MVB bus data without using other bus-independent information to realize accurate judgment of current MVB working master station equipment. The method is independent and universal.

Description

technical field [0001] The invention belongs to the field of communication bus detection, in particular to a method and system for judging MVB working master station equipment. Background technique [0002] The high-speed rail vehicle equipment uses the MVB bus as the communication bus, and the master station equipment is the MVB bus management equipment, which is used to manage the entire bus. In order to ensure communication reliability, the MVB bus often uses two master station devices that are hot standby for each other. If the current master station device fails, the bus system will automatically set the standby master station device as the working master station. This hot switching mechanism can ensure that the bus communication will not be interrupted. The application layer cannot perceive this master station switching operation, nor can it know the information of the current working master station. In practical applications, in order to locate the cause of the bus ...

AI Technical Summary

Problems solved by technology

[0004] It can be seen from this that when the judgment of the master station of the MVB bus depends on other auxiliary information other than the bus itself, there is a problem that it depends heavily on the business scenario of the application layer, and it does not have independence and versatility

Moreover, the auxiliary information used for judgment has a timeliness problem, and cannot accurately reflect the information of the current working master station

For example, if the train over-phase information is used for judgment, under normal circumstances, the train over-phase information only appears once every 20 minutes. During this period, there will be no over-phase log record information, and it is impossible to perceive the main station switching that occurs during this period.

Images