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A point-to-multipoint ring protection method and system

A protection system, multi-point technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as unfavorable saving of bandwidth resources, large number of backup paths, cumbersome configuration operations, etc., to save bandwidth resources, reduce the number of, The effect of simplifying configuration operations

Inactive Publication Date: 2011-12-28
ZTE CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0015] It can be seen that the protection scheme of ROM-FRR improves the usage of bandwidth to a certain extent. However, ROM-FRR, like FRR-TP, configures a Dedicated backup path, if there are many nodes on the ring, the number of backup paths to be configured is quite large, not only the configuration operation is cumbersome, but also not conducive to saving bandwidth resources

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  • A point-to-multipoint ring protection method and system
  • A point-to-multipoint ring protection method and system
  • A point-to-multipoint ring protection method and system

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Embodiment Construction

[0042] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0043] In order to solve the defects in the FRR-TP and ROM-FRR protection schemes in the prior art, a protection method for a point-to-multipoint ring provided by the present invention configures a corresponding backup path for a working path of a P2MP ring, and backup The transport direction of the path is opposite to that of the working path. Through this backup path, when any link or any node (except the root node) on the working path fails, it can protect the transmission of business traffic and ensure the normal reception of business traffic by each leaf node.

[0044] The protection method of P2MP ring of the present invention, as Figure 4 As shown, it mainly includes the following steps:

[0045] In step 401, the root node of the P2MP ring sends MPLS-TP OAM connectivity detection messages along the working ...

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Abstract

The invention discloses a point-to-multipoint ring protection method, which includes: the root node of the point-to-multipoint (P2MP) ring sends the operation management and maintenance (OAM) connectivity detection message along the working path and the backup path respectively; When the leaf node farthest from the root node on the path does not receive the OAM connectivity detection message on the working path within the preset rules, the farthest leaf node sends a fault message to the root node along the configured return path; The node activates the backup path according to the received fault message, and transmits the service traffic through the working path and the backup path; the leaf nodes on the P2MP ring receive service traffic from the working path or the backup path according to the preset local policy. The invention also discloses a point-to-multipoint ring protection system, which reduces the number of backup paths of the P2MP ring, simplifies the configuration operation of the backup paths, and saves bandwidth resources.

Description

technical field [0001] The invention relates to ring protection technology in network communication, in particular to a point-to-multipoint ring protection method and system. Background technique [0002] Driven by the trend of IP-based telecommunication services, the services carried by the transport network have shifted from Time Division Multiplexing (TDM, Time Division Multiplexing) to IP-based services. Level Operations Administration and Maintenance (OAM, Operations Administration and Maintain) and protected packet transmission technology. Under this requirement, the industry has proposed the concept of Packet Transport Network (PTN), and the Multi-Protocol Label Switching Transmission Framework (MPLS-TP, Transport Profile for Multi-Protocol Label Switching) is a PTN technology. [0003] In the MPLS-TP requirements (MPLS-TP requirements) defined by the Internet Engineering Task Force (IETF, Internet Engineering Task Force), the structure of MPLS-TP must be able to all...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/437
Inventor 代雪会张新全吴波
Owner ZTE CORP