Dual-network redundancy link system and communication node

Abstract

The invention provides a dual-network redundancy link system and a communication node, which relate to the field of communication control. The system comprises a master station and a slave station, wherein the master station comprises a first control device and a second control device in communication connection; the first control device and the slave station are connected to form a first ring network topology structure; the second control device and the slave station are connected to form a second ring network topology structure; the slave station comprises at least one communication node, and two communication links exist between the communication node and the master station or other communication nodes; the communication node comprises two communication units, the communication unit comprises a communication chip and a control chip which are electrically connected, and the communication chip is used for communication connection with other communication nodes or the first control device or the second control device through one of the two communication links according to a selection control command of the control chip. Thus, the system at most allows three communication links to fail, thereby greatly improving the reliability of the system and meeting link redundancy and controller redundancy.

Description

technical field [0001] The application relates to the field of communication control, in particular, to a dual-network redundant link system and a communication node. Background technique [0002] At present, in the connection of network equipment, the connection of a single link is easy to realize, but a simple fault in a single link will disconnect the link and cause network interruption. Therefore, in the actual communication network construction, In order to maintain the stability of the network, some backup connections (also called backup links or redundant links) are usually added in a network environment composed of multiple communication nodes, so as to improve the stability of the network. [0003] Please refer to figure 1 , the controllers and communication nodes between the existing redundant links are usually connected to each other to form a loop, and redundancy can be achieved to a certain extent through the loop, such as figure 1 As shown, the ring can accom...

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Problems solved by technology

[0003] Please refer to figure 1 , the controllers and communication nodes between the existing redundant links are usually connected to each other to form a loop, and redundancy can be achieved to a certain extent through the loop, such as figure 1 As shown, the ring can accommodate at most one fault point, that is, when a fault point occurs in the ring, the link connection between the controller and each control node can still be maintained, but if more than one fault point occurs in the ring At this point, some devices will completely disconnect from other devices in the link, causing system downtime

And a loop can only use a single controller, which cannot support controller redundancy design

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