Optical network multi-fault tolerant method

An optical network and multi-fault technology, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problem of fault location mechanism required for recovery, and can not well complete the response to multiple faults of the optical network, so as to avoid unsatisfactory deterministic effect

Active Publication Date: 2012-01-18
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Implementation of fault tolerance: both protection and recovery belong to the scope of fault tolerance. The main problem is that protection needs to reserve resources in advance, and recovery requires a fault location mechanism
[000...

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  • Optical network multi-fault tolerant method
  • Optical network multi-fault tolerant method
  • Optical network multi-fault tolerant method

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Embodiment Construction

[0034] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] The optical network multi-fault tolerance method of the present invention is realized based on the AntNet algorithm, and actively explores the connectivity of all paths. The measurement of connectivity can be divided into the optical layer and the electrical layer: the optical layer can be evaluated according to the physical damage of the optical signal, and the electrical layer is usually evaluated by the bit error rate. The two metrics are applied to different network types respectively. The physical damage of the optical signal is used for evaluation in the all-optical network, and the bit error rate is used for evaluation in the network with photoelectric conver...

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Abstract

The invention discloses an optical network multi-fault tolerant method which relates to the technical field of optical network survivability. Each optical network node i maintains an information prime matrix Ti and a local node model Mi. The method comprises the following steps of: S1. a positive ant in each node of an optical network selects a target node d according to flow distribution at a preset time interval, asynchronously moves to the target node d and records the physical connectivity of the passed path and a path node identifier; S2. after the positive ant arrives at the target node, a reverse ant is generated at the target node, and the positive ant transfers all memories to the reverse ant; and S3. the reverse ant returns along the passed path of the positive ant and adjusts the local node model in a network state and the information prime matrix of each accessed node on the way according to the final connectivity of the path. Through the invention, the damaged business can be rapidly turned to a normal network resource and the arrival business can be selected to a path with higher connectivity.

Description

technical field [0001] The invention relates to the technical field of optical network survivability, in particular to an optical network multi-fault tolerance method. Background technique [0002] The living environment of human beings is constantly deteriorating, natural disasters occur frequently, and the characteristics of the wide distribution of the telecommunication network make the telecommunication network vulnerable to damage, accidents often occur, and the consequences are extremely serious. The damage to the network by human factors occurs frequently. In my country, hundreds of optical cable interruptions occur in the backbone network every year, and the losses caused are incalculable. [0003] Fault tolerance means that when a path, node hardware failure or software error occurs in the optical network due to various reasons, the system can automatically restore these damaged or lost services and data to the state before the accident, so that the system can conti...

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Application Information

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IPC IPC(8): H04L12/24
Inventor 张杰黄善国李新赵永利顾畹仪
Owner BEIJING UNIV OF POSTS & TELECOMM
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