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

Abstract

The invention discloses an expansion processing method under international telecommunication union telecommunication standardization sector (ITU-T) G.8032 / Y.1344 multi-point fault. The method comprises the following steps of: defining a protocol expansion frame with a specific target address, and forwarding the protocol expansion frame to a port of a central processing unit (CPU) under the condition that a ring port is blocked; sending a protocol frame through a ring network node, sending an expansion frame and setting a forwarding hop initial value; after the ring network node receives the expansion frame, forwarding the expansion frame which is sent by other nodes through another ring port after forwarding hops in the expansion frame gradually increase or decrease, wherein the forwarding hops of the expansion frame do not exceed a forwarding hop threshold value; and processing the expansion frame according to a flow which is defined by a protocol. The method has the advantages that: on the premise that a protocol state machine is not changed and the convergence speed of a ring network is not influenced, the problem that a loop can be blocked after recovery of breaking points in ITU-T G.8032 / Y.1344 is thoroughly solved; and the method is applicable to the occasions with a high reliability requirement for data communication in a severe industrial environment.

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-T G.8032 / Y.1344 multi-point failure, which solves the problem that the R-APS PDU is blocked when the Ethernet ring recovers after multiple breakpoints. The problem that the port cannot be forwarded correctly, while making full use of the rapid convergence brought by the ITU-T G.8032 / Y.1344 (03 / 2010) protocol, also makes the data communication in harsh industrial environments reliable, At the same time, there is no need to make any changes to the ITU-T G.8032 / Y.1344 (03 / 2010) protocol state machine, etc.

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