Method and apparatus for shortening SDH multi-plexing segment protective rearranging time

A multiplex section protection and switching time technology, which is applied in multiplexing communication, time division multiplexing system, electrical components, etc., can solve the problems of long K1 and K2 byte change time and long protection switching time, etc. Achieve the effect of shortening the protection switching time and increasing the protection switching time

Inactive Publication Date: 2010-09-08
ZTE CORP
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcoming that the software polling detection K1 and K2 byte changes in the prior art takes a long time, and the K1 and K2 byte changes cannot be detected in real time for protection switching processing, and solve the problems existing in the prior art. In view of the problem that the protection switching time of the SDH multiplex section is relatively long, a method and device thereof for shortening the protection switching time of the SDH multiplex section are provided

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  • Method and apparatus for shortening SDH multi-plexing segment protective rearranging time
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  • Method and apparatus for shortening SDH multi-plexing segment protective rearranging time

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[0040] The implementation of the technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings:

[0041] The implementation principle of the multiplex section protection switching technical solution used in the present invention is shown in Fig. 1 . It consists of the following parts: SDH optical line K1 and K2 byte extraction module, FPGA (programmable logic device) hardware detection of K1 and K2 byte changes, CPU (processor) multiplex section protection switching processing.

[0042] The entire protection switching process is as follows: SDH optical line K1 and K2 byte extraction module extracts K1 and K2 bytes received on the corresponding optical line, and sends them to FPGA, which detects the changes of received K1 and K2 bytes If there is a change, record the contents of the currently received K1 and K2 bytes, and at the same time generate an interrupt signal to notify the CPU to perform multiplex sec...

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Abstract

The method and equipment for shortening time of protecting and rearranging SDH multiplexing segment in SDH ring net includes parts and procedures: module A of previous frame K1 / K2 byte, module B of current frame K1 / K2 byte, module C for detecting change of K1 / K2 byte, interrupting generation and refreshing control module D, and module E for processing protection and rearrangement for CPU multiplexing segment. Since K1 / K2 byte sent from interface board of optical line is updated according to 8kHz frame frequency, thus, the invention only needs to detect whether contents between K1 / K2 of current frame and K1 / K2 of previous frame are changed or not. From analysis in theory, in former polling mode of software, change of K1 / K2 is needed to check at two points: beginning and end nodes. One polling cycle is 1-3ms. In the disclosed method, it is most time as 0.4ms between occurrence of K1 / K2 change and generation of interrupting signal. Thus, protecting and rearranging time can reduce 1-5ms.

Description

technical field [0001] The invention relates to a method for realizing shortening the SDH multiplexing section protection switching time in an optical communication SDH ring network, and also relates to a device for shortening the SDH multiplexing section protection switching time. Background technique [0002] With the development of communication technology, people's demand for communication is increasing, and the requirements for communication quality are getting higher and higher. The survivability and reliability of communication networks are becoming more and more important. The SDH self-healing network in the field of optical communication has been obtained a wide range of applications. [0003] In the SDH self-healing network, the multiplex section protection switching ring is a relatively common structure. The multiplex section protection switching ring uses the multiplex section overhead (MSOH) bytes K1 and K2 in SDH to transmit failure information and start prote...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/08
Inventor 石建锋
Owner ZTE CORP
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