Gateway rotation method, system and device for data transmission based on canopen protocol

Abstract

The invention discloses a gateway rotation method, system and device for data transmission based on the CANopen protocol. The method includes: the host of the gateway enters the online state, and monitors the state of the heartbeat packet with the gateway backup machine through the communication network of the master and backup machines; If the heartbeat packet of the backup machine cannot be detected within the set heartbeat period, and the heartbeat packet of the master machine is successfully sent on the communication network of the master machine and the standby machine, the master machine will remain online and the backup machine will be offline; if the heartbeat packet of the master machine is sent on the communication network of the master machine If the transmission fails, the host will request the backup machine to go online through any communication network in the vehicle; if the response request from the backup machine cannot be received, the host will stop requesting the backup machine of the first communication network in the vehicle to go online, and request the backup machine through another communication network in the vehicle. The backup machine goes online; if the response request from the backup machine is still not received, the host computer remains online and records that the backup machine is offline. Thus, the good operation of the whole train is guaranteed, and the redundancy effect of the train network is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle communication, in particular to a gateway rotation method, system and device for transmitting data based on the CANopen protocol. Background technique [0002] At present, the most widely used train communication network is the train communication network (TCN) bus technology. TCN covers four buses: MVB (multi-function vehicle bus), WTB (twisted train bus), Ethernet, and CAN (field bus). . Among the design requirements for MVB, WTB, Ethernet, and CAN, a common requirement is network redundancy design. The so-called network redundancy means that a backup network should be set up for each communication network, that is, each node on the network will use a dual-line connection mode of A and B lines. The network realizes communication to ensure smooth data interaction of various products on the network, so that the operating environment of the train communication network has high availability. [0...

AI Technical Summary

Problems solved by technology

However, if there are abnormalities in the network of both the host computer and the backup computer of the network management system, this strategy will have hidden dangers.

[0004] For example, if some of the faulty nodes are in the main machine and the other is in the backup machine, using the above method, no matter which network is switched to receive data, some nodes will not be able to receive data. Incomplete data affects the realization of some functions, which in turn affects the operation of the entire vehicle

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