Method of topological convergent for layered yout light network

An optical network and routing technology, which is used in data exchange, electrical components, and transmission systems through path configuration. It can solve problems such as slow topology convergence, achieve convergence mechanism optimization, minimize topology convergence time, and improve topology convergence speed. Effect

Inactive Publication Date: 2006-06-14
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of slow topology convergence speed in the automatic switching optical network with layered multi-domain structure; to propose a topology convergence method based on representative node priority notification and adopting parallel topology convergence mechanism

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  • Method of topological convergent for layered yout light network
  • Method of topological convergent for layered yout light network
  • Method of topological convergent for layered yout light network

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with drawings and embodiments.

[0037] exist figure 1 In the shown embodiment, a schematic diagram of a three-layer automatic switching optical network of the present invention is given. Such as figure 1 As shown, there are upper, middle and lower optical networks, and each routing layer has several routing control domains, which include representative nodes and common nodes, and there are paths between nodes.

[0038]The three-layer network is Level1, Level2, and Level3. The control routing domains include CD1, CD2, CD3, CD4, CD5, CD6, CD7, and CD8. The representative nodes include S1, S2, etc., and the common nodes include N1, N2, etc., S1, N1 , N2 in CD8, S2 in CD2. The filling background of the representative node is darker than that of ordinary nodes, pentagonal, and ordinary nodes are hexagonal. There are paths for sending information updates between each routing layer, between nodes in diff...

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Abstract

This invention discloses a topological convergence method used in hierarchical route optical network including: when a node detects a link fault, it will send a link state announcement(LSA) to an agent node of the control domain to refresh the state, the router initiating the refreshment issues said LSA to other adjacent routers by flooding, which delete the LSA from the link state database and the agent node refreshes the topology database of the local control domain to abstract the topology in new control domains. When a router receives the LSA, it will refresh its topology database and flood said LSA to other data interfaces and routers operate the route algorithm to compute the route lists again.

Description

technical field [0001] The invention relates to a novel topology convergence method applied in the field of optical fiber communication, in particular to a topology convergence method applied in an automatic switching optical network with a layered multi-domain structure. Background technique [0002] A network is said to be convergent when the routers in the routing control domain have a consistent view of all available routes. Convergence time refers to the time required for the routing table of each router to synchronize changes in the network topology. The shorter the convergence time, the better, because when the routers have inconsistent knowledge of the network topology, data will not be routed correctly and effectively. Too slow network convergence will bring network instability to traditional IP networks and Automatic Switched Optical Network (ASON, Automatic Switched Optical Network) networks, but the specific impacts are not the same. In a traditional IP network...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04L29/06
Inventor 纪越峰刘爱波陆月明
Owner BEIJING UNIV OF POSTS & TELECOMM
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