Hardware-based protection group switching method and optical communication equipment

Abstract

In the hardware-based protection group switching method and optical communication equipment of the present invention, when the FPGA in the equipment detects the switching trigger information indicating that the local network element may have a switching triggering situation, it transmits it to each protection state machine through the hardware bus; each protection state The machine determines one or more relevant protection groups that may be affected by each switching trigger situation according to the relevant service flow information, and generates each corresponding switching trigger condition according to each switching trigger information; the protection state machine corresponding to the relevant protection group respectively prestores the table Query the operation results of the automatic protection switching protocol; update the cross table according to the operation results, and configure the updated cross table to the cross chip or packet switching chip through FPGA; realize the protocol algorithm of protection switching on the hardware and can process multiple groups of protection in parallel Switching reduces the service interruption time caused by batch switching, improves the performance of multi-group protection switching, and increases the survivability of the network.

Description

technical field [0001] The invention relates to the technical field of optical transmission network, in particular to a hardware-based protection group switching method and optical communication equipment. Background technique [0002] Optical Transport Network (OTN) is widely used in the backbone transport network. It is based on wavelength division multiplexing technology and is fully backward compatible. It can be used with optical synchronous digital transmission network (SDH) and wavelength division multiplexing ( WDM) equipment integration provides large-scale multiplexing, crossover and configuration, and significantly improves the adaptation and transmission efficiency of transmission networks for high-bandwidth data. At the same time, the OTN equipment also provides flexible service protection functions based on the electrical layer and the optical layer, such as based on the optical channel data unit [0003] (ODUk) layer subnet connection protection (SNCP) and sh...

AI Technical Summary

Problems solved by technology

[0005] In the actual network environment, it often occurs that a line failure will affect multiple protection groups and cause these protection groups to perform protection switching operations in batches. The protection switching processing of these protection groups is usually performed serially, and the protection switching takes time. As the number of protection groups increases linearly, when there are many protection groups configured on network element nodes, the total time for protection switching will be longer, and it is difficult to meet the requirement that the service recovery time is less than 50 milliseconds

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