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Message accurate recognition-based substation communication network deterministic path switching method

A communication network and substation technology, applied in the field of substation communication network deterministic path switching based on accurate message identification, can solve problems such as misconfiguration, GOOSE/SV message identification or forwarding errors, etc., to alleviate network congestion and ease equipment. Effects of mishandling problems

Inactive Publication Date: 2014-03-19
SOUTH CHINA UNIV OF TECH +1
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Problems solved by technology

However, in practical applications, different GOOSE or SV packets may have the same APPID due to misconfiguration, hot standby, and test device access, which may cause GOOSE / SV packet identification or forwarding errors

Method used

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  • Message accurate recognition-based substation communication network deterministic path switching method
  • Message accurate recognition-based substation communication network deterministic path switching method
  • Message accurate recognition-based substation communication network deterministic path switching method

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with specific examples.

[0027] see figure 1 and figure 2As shown, the frame structure of the GOOSE message and the frame structure of the SV message are shown respectively. It can be seen from the figure that the first 12 bytes of the GOOSE and SV messages are the destination address and source address of the message, 0x8100, 0x88B8 and 0x88BA 0x8100 means that the field after this field is a VLAN (virtual local area network) flag, 0x88B8 means that this message is a GOOSE message, 0x88BA means that this message is an SV message, APPID is an application ID, and the data is The data information carried in the message has a variable length, and CRC is a cyclic redundancy check code.

[0028] The 19th and 20th bytes of the GOOSE and SV packets are the application identifier APPID. APPID is a visible character string, which represents the logical device where GoCB is located. The default value is li...

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Abstract

The invention discloses a message accurate recognition-based substation communication network deterministic path switching method. The method comprises the following steps that: an IED at first needs to parse the APPID, SRCMAC and GOOSEID ref / smvID of GOOSE and SV messages; and then HASH computation is performed on the GOOSEID ref / smvID so as to form an ASH combination key; an ASH forwarding table is searched, when contents that completely conform to the APPID, SRCMAC and HASH (GOOSEID ref / smvID) of the massages exist in the ASH forwarding table, the massages directly go to corresponding ports in the ASH forwarding table, and when no corresponding information or information that is not completely corresponding to the APPID, SRCMAC and HASH of the messages exists in the ASH forwarding table, the messages are discarded; and finally, the messages enter a queue at the ports through cache mapping, and queue up for transmission, and at the same time, equipment continues to receive GOOSE and SV messages. With the message accurate recognition-based substation communication network deterministic path switching method of the invention, problem of conflicts in message recognition can be avoided; deterministic path forwarding of specified massages can be realized; and problems of network congestion and equipment misoperation caused by a multicast switching mode can be effectively alleviated.

Description

technical field [0001] The invention relates to the technical field of substation communication network message transmission, in particular to a substation communication network deterministic path switching method based on accurate message identification. Background technique [0002] The real-time reliability of message transmission is an important index to evaluate the communication network performance of substation automation system. In the process of message exchange, it is an effective means to improve the real-time reliability of the communication network to realize the controllability of the information transmission process and the identification of error messages. The main messages transmitted in the substation communication network are GOOSE, SV and MMS messages, among which GOOSE and SV messages are transmitted in the network by broadcasting. Since the switching technology used in the current substation communication network cannot effectively identify the type of...

Claims

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Application Information

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IPC IPC(8): H04L12/741H04L45/74
Inventor 蔡泽祥竹之涵苏忠阳席禹张延旭王海柱
Owner SOUTH CHINA UNIV OF TECH
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