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Method for enhancing survivability of automatic exchange optical network

An automatic switching, optical network technology, applied in the field of optical networks, can solve the problems of long recovery time and reduce network survivability, and achieve the effect of reducing recovery time, reducing the number of nodes, and reducing recovery time

Inactive Publication Date: 2007-06-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantage of this aspect is that the recovery success rate is relatively high, and the disadvantage is that the recovery time is relatively long, thereby reducing the survivability of the network

Method used

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  • Method for enhancing survivability of automatic exchange optical network

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Embodiment Construction

[0035] Embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0036] Figure 1 shows an embodiment of a wavelength routed optical network topology. The wavelength routing optical network consists of two stages. Each level consists of a varying number of routing domains. Each routing domain logically consists of a data plane and a control plane, and is physically associated with a certain number of optical node devices (hereinafter referred to as nodes). In this example: the first level of the optical network includes two routing domains, routing domain 1 and routing domain 2, and the second level of the optical network includes routing domain 3. Marks 11, 12, 13, 14 and 15 represent nodes related to routing domain 1; marks 21, 22, 23, 24 and 25 represent nodes related to routing domain 2; marks 31, 32, 33 and 34 represent nodes related to routing domain 3 related nodes. The data plane and control plane of r...

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Abstract

The present invention relates to a method for enhancing survivability of automatic switching optical network (ASON). Said method is characterized by that said invention utilizes the downstream node of damaged chain link to coordinate optical network resource distribution of damaged channel, solve the influence of optical network resource collision to network survivability in the course of chain link failure restoration and raise restoration successful rate. Said invention adopts a staged parallel restoration process so as to reduce connection creating time.

Description

technical field [0001] The invention belongs to the technical field of optical networks, and in particular relates to the restoration resource coordination based on the control plane of the Automatic Switching Optical Network (ASON) and the fast restoration process with faults. Background technique [0002] The International Telecommunication Union (ITU-T) positions the Automatically Switched Optical Network (ASON / ASTN) as a global unified transport network. It is expected that thousands of switches and millions of terminal nodes will be connected to this network in the future. middle. At present, the transmission rate of a single fiber has reached the level of Tbps (1012 bit / s). If a single fiber in the ASON optical network fails (such as a fiber break), it will cause a large amount of user data to be lost in a short period of time, resulting in network quality of service (QoS) decline. Carrier-level service quality requires 99.999% reliability, that is, the sum of allowe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24
Inventor 郑小平王超张汉一
Owner TSINGHUA UNIV
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