Expansion processing method under international telecommunication union telecommunication standardization sector (ITU-T) G.8032/Y.1344 multi-point fault

Abstract

The invention discloses an extended processing method under ITU-T G.8032 / Y.1344 multi-point fault, the main content of the method is: define a protocol extension frame with a specific target address, and ensure that the frame is blocked at the ring port It can also be forwarded to the CPU port; the ring network node sends the protocol frame, and at the same time sends the extended frame and sets the initial value of the forwarding hop; For an extended frame exceeding the forwarding hop count threshold, the forwarding hop count in the extended frame is incremented or decremented, and then forwarded through another ring port, and then the extended frame is processed according to the process defined by the protocol. The present invention completely solves the problem that the recovery of multiple breakpoints in ITU-T G.8032 / Y.1344 may lead to loop failure under the premise of no modification to the protocol state machine and no influence on the convergence speed of the ring network. Applications requiring high reliability such as data communication in harsh industrial environments.

Description

technical field [0001] The invention relates to a high-reliability data communication method of an Ethernet ring in a harsh industrial environment, in particular to a solution to the ITU-T G .8032 / Y.1344 (03 / 2010) The processing method of incorrect protocol status belongs to the field of data communication. Background technique [0002] The field of data communication in harsh industrial environments (including factory automation, intelligent transportation systems (ITS), deployment in substations and other harsh environments, etc.) widely uses Ethernet rings to connect industrial equipment (such as remote terminal units RTU and PLC, etc. ) to provide redundant protection of the data path. Generally, the Ethernet ring in a harsh industrial environment is a ring network formed by several industrial Ethernet switches or routers (hereinafter referred to as switches). Its topology is shown in Figure 1. In the figure, S1 to S10 are connected to form a ring. S1 to S10 are variou...

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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides an extended processing method under ITU-TG.8032 / Y.1344 multi-point failure, which solves the problem of In the case of recovery after multiple breakpoints, the R-APSPDU cannot be forwarded correctly on the blocked port. While making full use of the fast convergence brought by the ITU-TG.8032 / Y.1344 (03 / 2010) protocol, it also makes Data communication in harsh industrial environments becomes reliable without any changes to the ITU-TG.8032 / Y.1344 (03 / 2010) protocol state machine, etc.

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