Method, system and node for realizing auto protection switching in Optical Burst-Switching Ring

Abstract

A method, system, and node for implementing automatic protection switchover in an optical burst switch ring. The method comprises: a primary node and a secondary node separately performing optical power monitoring on separate channels, and aggregating monitoring results to the primary node; when determining, according to the monitoring results, that a fault occurs, the primary node sending a switchover operation instruction to the secondary node; and the secondary node performing a switchover operation and entering a protection working state. By using the present invention, a protection switchover mechanism is introduced to the optical burst switch ring, processing on the fault is implemented, and communication quality in the optical burst switch ring is ensured. Further, in the method of the present invention, different switchover operation manners are used for a data channel and a control channel, which meets a protection requirement of a centralized-control optical burst switch ring for a control channel loop, ensures that the control channel can still work in a primary-secondary ring working mode, considers utilization of a transceiver on a data channel, and brings availability of a transceiver on each node into full play.

Description

technical field [0001] The present invention relates to network protection technology, in particular to a method, system and node for realizing automatic protection switching in a centrally controlled Optical Burst-switching Ring (OBRing, Optical Burst-switching Ring). Background technique [0002] The continuous development of the Internet, especially with the increase in the number of users, the continuous increase in bandwidth demand, and the general promotion of cloud service models, makes it increasingly difficult for the traditional metropolitan aggregation network to cope with the high flexibility and bandwidth provided by services. High reliability and low energy consumption requirements. Under the background of such demand, Optical Burst-switching Ring (OBRing, Optical Burst-switching Ring), as an all-optical networking technology capable of providing sub-wavelength switching granularity, has been extensively researched and paid attention to. Such as figure 1 As s...

AI Technical Summary

Problems solved by technology

However, in the steering mode protection switching of RPR, the default node can perform optical-to-optical conversion for services, so the switching scheduling is simple, but it cannot be directly used in the OBRing network, especially for centralized control OBRing, the control information of bandwidth allocation is still There must be a path that can traverse all nodes at one time and return to the master node, and the traditional steering mode based on distributed control does not consider this special requirement

In fact, the cut-through mode is also aimed at the node of optical-to-optical conversion. In the case of a fault in the electrical domain, this node can be directly spanned in the optical domain by switching, so as to ensure that the remaining nodes of the network can continue to work. However, in OBRing nodes It supports transparent penetration of services, and only controls the optical-to-optical conversion of the channel, so the cut-through mode is of little significance in OBRing

The wrapping mode is similar to the two-fiber one-way multiplexing protection technology in SDH. It only completes the switching in the optical domain. It not only supports the optical network, but also supports the all-optical networking technology. However, there are no related technical solutions for the existing wrapping mode. The characteristics of centralized control OBRing are improved so as to be applicable; moreover, the wrapping mode in OBRing of all-optical switching will cause the transceiver equipment on the standby optical fiber to stop data transmission and reception work due to entering the protection mode, resulting in waste of resources, so from the business From a recovery point of view, it is not the best solution

[0006] To sum up, for a centralized control OBRing all-optical switching network that can provide sub-wavelength switching granularity, there is currently no specific technical solution for protection switching and service recovery

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