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A protection switching method and node

A technology of protection switching and end nodes, applied in the field of communication, can solve problems such as waste of overhead and resources, and achieve the effect of improving efficiency

Active Publication Date: 2018-08-21
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of this, embodiments of the present invention provide a method and node for protection switching, which can solve the problem of waste of overhead resources

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  • A protection switching method and node
  • A protection switching method and node
  • A protection switching method and node

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Embodiment Construction

[0078] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0079] SMP (Shared Mesh Protection, Shared Mesh Protection) allows protection resources to be shared by multiple working paths, where the multiple working paths do not need to have the same source node and sink node. figure 2 It is a schematic diagram of an SMP network topology structure provided by an embodiment of the present invention. S1 and S2 are two working paths, and the paths are A-B and C-D respectively. P1 is the protection path of S1, and its path is A-E-F-G-B, P2 is the protection path of S2, and its path is C-E-F-G-D, and the path of shared protection resources of S1 and S2 is E-F-G. Wherein, the protection resources include resources such as nodes, links, and bandwidth. The service ID of the service corresponding to S1 and P1 is W1, and the service ID of the service corresponding to S2 and P2 is W2. When a failure occurs on the working path, a...

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Abstract

The embodiment of the present invention discloses a protection switching method, including: when the working path between the first end node and the second end node fails, the first end node sends a first protection switching request message to the intermediate node , wherein the protection path of the working path includes the first end node, the second end node, and at least one intermediate node; the first end node receives a second protection switching request message from the intermediate node , switching service data to the protection path for transmission; wherein, one overhead frame in the first protection switching request message and the second protection request message includes at least two overhead information groups, and the overhead information group includes a request type field, a request signal identification field, and a bridge identification field. An overhead frame in the first protection switching request message and the second protection request message can indicate the overhead of two time slots, which improves the utilization rate of overhead resources.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a protection switching method and a node of an optical transport network. Background technique [0002] The traditional optical transmission network is mainly based on ring or linear topology, which can provide multiplex section protection, channel ring protection, linear 1:1 multiplex section protection, linear 1+1 multiplex section protection and end-to-end subnet connection protection ( Subnetwork ConnectionProtection, SNCP) and a series of protection technologies. On the premise of supporting single link failure, traditional optical network protection technologies need to reserve protection resources that occupy a large amount of network bandwidth resources, and the bandwidth utilization rate is low. [0003] With the development of telecommunication technology, Shared Mesh Protection (SMP) technology based on Automatically Switched Optical Network (ASON) has emerged. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/038H04L45/28
CPCH04B10/038H04J3/085H04J3/14H04L45/28H04J2203/006H04B10/275H04J3/1652H04Q11/0062H04Q2011/0081H04Q2011/0088
Inventor 郑好棉
Owner HUAWEI TECH CO LTD
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