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Method for recovering local span mesh network in automatic exchanging optical network

An automatic switching and optical network technology, applied in the field of intelligent optical network, can solve the problems of slow network recovery, achieve good performance and improve network recovery speed

Active Publication Date: 2008-07-16
ZTE CORP
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  • Abstract
  • Description
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Problems solved by technology

[0013] The feature of the restoration method mentioned above is that the full mesh network is restored. If necessary, the entire connection will be released. The source node will sequentially select all the nodes connected in the original network, which may change the original connection path, and the network Recovery is slower

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  • Method for recovering local span mesh network in automatic exchanging optical network
  • Method for recovering local span mesh network in automatic exchanging optical network
  • Method for recovering local span mesh network in automatic exchanging optical network

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Embodiment Construction

[0031] Local inter-segment mesh recovery (LSMR) in ASON uses Link Aggregation (Link Aggregation) technology to bundle multiple links with the same attributes between adjacent nodes into a link group. During maintenance, the link group is published as a single link state broadcast message, so that other nodes in the network logically regard this link group as a link.

[0032] For a connection with the local cross-segment mesh network recovery attribute, when the link where the service transmission is located in the span configured with link aggregation fails, the adjacent node of the span where the transmission service is located is found in the link group where the failed link is located. After the link is idle, switch the service from the faulty link to the idle link in the link group to which it belongs, and perform local recovery directly on the span where the faulty link is located. If the source node does not receive the signaling message of link failure on the transmissi...

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Abstract

The invention discloses a method of restoring a local span mesh network in an automatic switched optical network, which includes the following steps: when a service fails in a link, a link group of a span where the failure link is located is determined whether an idle link is existed or not, if so, the service is rearranged from the failure link to the idle link in the link group for transmission, and the restoration of the link is completed. The method embodies the flexibility of intelligent optical network protective restoration, has the characteristic of quick restoration without changing the prior linkage path, reestablishes a request by a source node to set up a new linkage when the local mesh network can not be restored, and particularly obviously improves the speed of network restoration when applied in a large scale network. The performance of the mode of local mesh restoration is better than that of the mode of nonlocal mesh restoration.

Description

technical field [0001] The present invention relates to the field of intelligent optical network, in particular to a local span mesh restoration (Local Span Mesh Restoration, LSMR) method in an Automatically Switched Optical Network (ASON, Automatically Switched Optical Network). Background technique [0002] With the rapid development of the network, the application of optical network is becoming more and more extensive. ASON, the core technology for building a new generation of optical network, is supported by a compatible and scalable hardware system and integrates advanced software systems into the hardware platform. Form a more scalable and data-centric basic platform, thereby changing the optical layer from a static transmission medium to a dynamic and intelligent optical network structure, and can provide various flexible solutions directly from the optical domain. The high-speed value-added services enable operators to quickly provide services directly from the optic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L1/22H04L12/56H04Q11/00
Inventor 何伟
Owner ZTE CORP
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