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Method for carrying out VPR protection inversion in network

A protection switching and virtual path technology, which is applied in the field of virtual path ring protection switching in the network, can solve the problems of no virtual path ring protection, and no specific quantitative indicators for response time, so as to ensure reliability and security. the effect of improving the quality of service

Inactive Publication Date: 2008-03-12
FENGHUO COMM SCI & TECH CO LTD
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Problems solved by technology

However, ITU-T did not propose the concept of shared virtual path ring protection, and did not provide specific quantitative indicators for the response time of ATM layer protection switching
[0008] As mentioned above, the industry has not yet proposed a practical and feasible method to implement 50 ms protection switching on the most commonly used virtual path ring for realizing service aggregation shared channels

Method used

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  • Method for carrying out VPR protection inversion in network
  • Method for carrying out VPR protection inversion in network
  • Method for carrying out VPR protection inversion in network

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Embodiment Construction

[0026] The APS cell format adopted by the present invention is shown in FIG. 6. For the APS cell header, it is necessary to fill in a VPI / VCI value reserved by ITU-T for the corresponding detection link.

[0027] Figure 1 is a schematic diagram of a ring structure in which all nodes share a virtual path ring. In the figure, it is assumed that the ring that transmits service data in a clockwise direction and is marked as 0 represents the current ring, and the ring marked as 1 is its counterpart ring. In the following description, APS_0 represents the APS cell sent through the detection link on this ring, and APS_1 represents the APS cell sent through the detection link on the paired ring. In the entire ring shown in Figure 1, each node sends an APS cell to neighboring nodes on Ring 0 and Ring 1 every 10 milliseconds, and receives an APS cell accordingly, analyzes the received data, and executes the corresponding The protection switching operation is performed, and then the data sen...

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Abstract

The invention relates to APS method for shared VP- ring in ring network with ATM technology, which comprises: sending and receiving the APS cell defined with I.630 as reference and contained alert information and node space code address to detect logic link group state, realizing said protective switch to logic business with millisecond-level response speed; wherein, the switch is realized by modifying route list; when some node takes APS to self-ring business, the business of this ring also be automatic protection switched to match ring. This invention has less damage to business and high utility for bandwidth, and can match with APS of SDH.

Description

Technical field [0001] The invention relates to a method for realizing shared virtual path ring (VP-ring) protection switching in a ring network adopting asynchronous transfer mode (ATM) technology. The method can realize the protection switching of the millisecond-level response speed of logic layer services. Background technique [0002] At present, the ring network using ATM technology is widely used to construct a multi-service transmission platform (MSTP). Among them, ATM technology is mainly used to provide link layer functions with friendly interfaces with other layer protocols. Due to the good quality of service (QOS) brought by ATM with multiple service levels, the fixed cell length brings fast switching, and Asynchronous statistical multiplexing brings efficient service transmission, and supports dynamic and static connection-oriented call admission control (CAC), complete operations management and maintenance (OAM) functions, and supports reliable network flow control ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/437H04L12/56H04J3/08H04L45/586
Inventor 刘怀明朱冬艳
Owner FENGHUO COMM SCI & TECH CO LTD
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