Wavelength conversion range limited 2-hop-segment-based dynamic optical multicast P-ring segment protection method

A wavelength conversion and optical multicast technology, applied in electromagnetic wave transmission systems, electrical components, transmission systems, etc., to reduce costs and achieve the effect of simple technology

Active Publication Date: 2014-01-01
重庆信科设计有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The existing protection objects are only for node failures or link failures, and the protection methods are mostly for the status quo of static services

Method used

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  • Wavelength conversion range limited 2-hop-segment-based dynamic optical multicast P-ring segment protection method
  • Wavelength conversion range limited 2-hop-segment-based dynamic optical multicast P-ring segment protection method
  • Wavelength conversion range limited 2-hop-segment-based dynamic optical multicast P-ring segment protection method

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Embodiment Construction

[0025]The 2-hop P circle protection method designed by the present invention to solve node link failures in optical network multicast includes three processes: use an improved backtracking depth-first search algorithm to find all loops in the directed graph, and multicast business Segmentation and dynamic multicast segment protection based on P-circle wavelength resource utilization in the wavelength layered graph model. For the optical multicast request arriving at the input node of the optical network, firstly, according to the available wavelength bandwidth resource and topology relationship in the optical network, use the retrospective depth-first algorithm to find all the loops of the network topology; in the network topology, according to the source and destination nodes relationship to find a multicast tree with the minimum path cost, and then segment the path from the source node to each destination node in the multicast tree diagram to find out the path segments where ...

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Abstract

The invention relates to a wavelength conversion range limited 2-hop-segment-based dynamic optical multicast P-ring segment protection method, belonging to the technical field of network protection. The method comprises the steps of: firstly, searching all loops for a network through a backtracking depth-first search algorithm; then, carrying out path segmentation on a multicast tree, and searching link separated path segments, wherein the survivability of all nodes and links in multicast can be guaranteed through protection on the path segments; finally, obtaining a P ring with the highest efficiency through the wavelength resource utilization of the loops, and establishing the multicast tree and looking for P ring protection to meet a multicast request under the condition that the wavelength conversion range is limited. According to the wavelength conversion range limited 2-hop-segment-based dynamic optical multicast P-ring segment protection method disclosed by the invention, the survivability of dynamic multicast service in an optical network can be guaranteed effectively, and wavelength resources, used by the multicast service and P rings, in the network are reduced.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a 2-hop P-ring protection method for solving node link failures of dynamic multicast services with limited wavelength conversion ranges in optical multicast networks. technical background [0002] With the development of optical network technology, there are more and more optical multicast applications in the optical network for single-point transmission and multi-point reception, and the consumption and congestion of optical network bandwidth increase rapidly. With the gradual increase of optical fiber transmission capacity, once The failure of a certain node or link may cause multiple destination nodes to fail to receive data, and a large number of services will be lost. Improving the survivability of optical network multicast has become an important issue faced by optical networks. At present, there are mainly two measures to ensure the survivability of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/032
Inventor 刘焕淋陈勇岁蒙胡晓慧王杨杨
Owner 重庆信科设计有限公司
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