Dual-link redundancy control method based on EPA switch

A switch and dual-link technology, applied in the field of network communication, can solve problems such as increasing network robustness, adaptability and reliability, and achieve the effects of preventing network paralysis, reducing complex operations, and improving convergence time.

Active Publication Date: 2012-03-28
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the previous single-ring network redundancy method, the present invention solves the problem of network unavailability caused by multi-point failure, and does not need to be configured in advance, the switch can independently select the working l

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  • Dual-link redundancy control method based on EPA switch
  • Dual-link redundancy control method based on EPA switch
  • Dual-link redundancy control method based on EPA switch

Examples

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] This embodiment is an industrial Ethernet switch based on the EPA protocol (hereinafter referred to as the EPA switch), which ensures the reliability and security of the communication between the EPA field devices and the EPA network segments according to the characteristics of the EPA network itself.

[0031] Such as figure 1As mentioned above, during the network initialization process, a competition mechanism is used to select the first master switch and determine ports on the same network segment. Usually, the switch with the smallest MAC value can be selected as the first master switch, and a pair of ports connected to the same switch are ports on the same network segment.

[0032] Specifically, after the EPA switches on all the rings ...

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Abstract

The invention requests a dual-link redundancy control method for protection of an Ethernet for plant automation (EPA) switch, wherein the invention relates to the industrial ethernet on-site control field. According to the invention, in the network, a dual-link loop network is formed between EPA switches by connection of two links that are redundant mutually; on the basis of analyses on the links, a strong link between the two links is selected as a working link and the other link is selected as a standby link; the network is trimmed as a loop-free topological structure; transmission of a token that is capable of being elected as main switch authority is carried out and main switch replacement is periodically carried out on the switches; meanwhile, state detection is carried out on the work link and the standby link as well as a plurality of link faults can be processed, so that reliability, stability and robustness of the network are improved.

Description

technical field [0001] The invention relates to network communication technology, in particular to a dual-link redundant control method of an EPA network. Background technique [0002] Industrial Ethernet EPA (Ethernet for Plant Automation) is the mainstream technology in the field of commercial computer communication such as Ethernet and TCP / IP, which is directly applied to the communication between industrial control field devices, and on this basis, it is established and applied to industrial field devices. Open network communication platform for communication. It is a brand-new open real-time Ethernet standard suitable for industrial field devices. It applies a large number of mature IT technologies to industrial control systems, and utilizes efficient, stable, and standard Ethernet and UDP / IP protocols for deterministic communication scheduling. strategy, establishing a new standard for real-time work for field devices. [0003] Due to the characteristics of the EPA n...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/433H04L12/56
Inventor 王浩高毅欣彭川虎王平王立民王慧鑫
Owner CHONGQING UNIV OF POSTS & TELECOMM
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