Method and apparatus for obtaining constrained path of loose routing in intelligent optical network

An intelligent optical network, loose technology, applied in the field of intelligent optical network, can solve problems such as network efficiency reduction, achieve the effect of reducing processing capacity requirements and improving network efficiency

Inactive Publication Date: 2005-12-14
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

Moreover, the source node and the intermediate node cannot immediately know whether the LSP with loose constraints can be successfully est

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  • Method and apparatus for obtaining constrained path of loose routing in intelligent optical network
  • Method and apparatus for obtaining constrained path of loose routing in intelligent optical network
  • Method and apparatus for obtaining constrained path of loose routing in intelligent optical network

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Embodiment Construction

[0055] In order to make it easier for those skilled in the art to understand and realize the present invention, the embodiments of the present invention are described in conjunction with the accompanying drawings.

[0056] First, the routing requester determines the source node, loosely sequenced link, and destination node of the constrained path. A loose link is expressed as: node + interface index of the link. For example, if figure 1 As shown, assuming that the source node is 5, the destination node is 9, and the sequence loose links are 5, 2-3, 3, 1-2, 8, 2-4, then the determined loose sequence nodes are 3, 8. Therefore, a group of loose-sequence nodes can be determined at the source node according to the loose-sequence links.

[0057] According to the present invention, the source node that initiates the route calculation also needs to obtain the topology structure of the network. The steps of obtaining the network topology are as follows: if the network routing is int...

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Abstract

The present invention disclosed method and device of restriction path from loose routing in intelligent light network. The present invention includes mainly obtaining the topologic structure of ordered loose links, source nodes, target nodes and network; determining one group of ordered loose nodes based on the ordered loose links, and calculating the path between the source node and the first ordered loose node, the paths between each two adjacent nodes and the path between the last loose node and the target node; and finally merging all the calculated paths and end-to-end connecting all the paths in certain order to form complete path output. The present invention has high network efficiency and relaxed requirement in node treatment capacity. In addition, the present invention can determining whether to have the possibility of find one path to the target node and meeting the requirement of loose routing restriction via only once calculation on the source node.

Description

technical field [0001] The present invention relates to intelligent optical network technology, in particular to a method and device for obtaining a constrained path of loose routing in an intelligent optical network. Background technique [0002] Optical network includes SDH / Sonet and wavelength network. The traditional optical network is a system based on centralized management, and the nodes of the network use permanent connection to realize communication. The creation, maintenance, and removal of optical connections all require manual intervention. Therefore, this optical network system cannot meet the growing, dynamic, and flexible requirements of data services. The key to solving this problem is dynamic optical switching. ITU's Automatically Switched Optical Network (ASON) architecture adds a control plane to the traditional optical network: the optical network node first obtains the connection relationship between the network node and other optical network nodes throu...

Claims

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Application Information

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IPC IPC(8): H04Q11/00
Inventor 王彧
Owner HUAWEI TECH CO LTD
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