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Multiplex section shared loop protecting method

A loop protection and multiplexing section technology, applied in the field of optical communication networks, can solve the problems of prolonging the protection time, limiting the number of loop sites, reducing the protection reliability, etc., to simplify the protocol processing process, improve the reliability, increase the Apply face effects

Active Publication Date: 2007-10-24
HUAWEI TECH CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0010] The present invention provides a multiplex section shared loop protection method to solve the problems in the prior art that the multiplex section shared loop protection needs to use the APS protocol to prolong the protection time, reduce the protection reliability and limit the number of loop sites

Method used

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Embodiment Construction

[0038] The present invention is applied to the two-fiber bidirectional multiplexing section sharing protection ring in the optical network, and the division of the working channel and the protection channel of the ring network is similar to that of SDH / SONET (Synchronous Optical Network, synchronous optical network). Segment sharing protection ring, which has N AU4 in total, the time slots numbered 1 to N / 2 in the clockwise direction are used as working channels, and the AU4 time slots numbered N / 2+1 to N are used as protection aisle. The time slot arrangement of the fiber in the counterclockwise direction is similar. The AU4 working channel numbered m is protected by the (N / 2+m)th AU4 of the corresponding protection channel ring.

[0039] As shown in Figure 2, 8 sites A, B, C, D, E, F, G, and H form a two-fiber ring, and there are two optical fibers between each two sites, and each optical fiber can be divided into two types The channel corresponds to the working channel / pr...

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Abstract

Present invention relates to multiplexing segment sharing ring circuit protection method, which contains pre - linking protection channel among sites to protection channel loop, when circuit between two sites in loop occurs fault, executing follow steps, A, when detecting circuit fault in any end of site, sending multiplexing segment sharing fault indication message to opposite site of fault circuit, B, fault circuit two ends site detecting the circuit fault alerting signal or receiving multiplexing segment far end fault indication information, then respectively bridging fault circuital transmitting / reception channel to corresponding protection channel to complete the switch from working channel to protection channel. Said invention can raise the switching speed and reliability between work channel and protection channel.

Description

technical field [0001] The invention relates to an optical communication network, in particular to a method for realizing ring service protection through a protection channel when a failure occurs in a working channel in a two-fiber bidirectional multiplexing section shared protection ring. Background technique [0002] SDH (Synchronous Digital Hierarchy) is a synchronous network transmission technology developed rapidly after the 1980s. As a bottom-layer transmission network with a unified standard in the world, it provides a wide range of reliable transmission interfaces with the help of optical fiber / WDM (Wavelength Division Multiplexed, wavelength division multiplexing) and other physical communication lines, and supports upper-layer voice exchange aggregation / data exchange aggregation and other networks application. A very important feature of SDH technology is its physical line protection capability, among which the multiplex section ring network protection is a widel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/437H04L29/06
Inventor 向晖
Owner HUAWEI TECH CO LTD
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