Method and device for protection switching

Abstract

The invention discloses a method and a device for protection switching. The method comprises the following steps: when detecting that a first main channel has failure, a first main channel signal receiving unit in a first network node sends a protection switching instruction to a first standby channel signal receiving unit and a second main channel signal sending unit; the first standby channel signal receiving unit starts the reception of service signals according to the protection switching instruction; the second main channel signal sending unit closes the sending of the service signals according to the protection switching instruction; when detecting that no service signal is received, a second main channel signal receiving unit in a second network node sends a protection switching instruction to a second standby channel signal receiving unit; and the second standby channel signal receiving unit starts the reception of the service signals according to the protection switching instruction. The invention can realize bidirectional and automatic protection switching among network nodes so as to improve the efficiency of the protection switching of the network; in addition, becausemanual intervention is not needed, the cost for maintaining the network is reduced.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a protection switching method and device. Background technique [0002] With the rapid development of broadband network technology, the volume of IP network communication business has grown explosively. While the data of IP network communication business is developing in the direction of large particles, the reliability and security of IP network communication business for data transmission networks are also raised. higher requirement. At present, the application of Wavelength Division Multiplexing (WDM) network bearer data service (IP over WDM) technology can solve the problem of effective transmission of large-grained IP network communication service data. [0003] In the network architecture of IP over WDM, at the WDM level, the main protection switching mode is 1+1 optical wavelength protection switching mode. The principle of protection switching is as follows...

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a protection switching method and device, which are used to solve the problem of service transmission performance degradation caused by the fact that bidirectional transmission services can only realize unidirectional protection switching when a unidirectional fault occurs in the network in the existing IP over WDM network, and through Manual switching leads to switching time lag and low efficiency

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