Misconnection squelching in all-optical ring networks

摘要

Misconnection means the condition in which traffic destined for a given node is incorrectly routed to another node and no corrective action has been taken when protection are executed in ring networks. In order to perform a ring switch, the protection channels are essentially shared among each span of the ring. Also, extra traffic may reside in the protection channels when the protection channels are not currently being used to restore working traffic transported on the working channels. Thus, each protection channel is subject to use by multiple services (services from the same wavelength but on different spans, and service from extra traffic). If adopting Multiplex Section (MS) shared protection in ring networks, with no extra traffic on the ring, under certain multiple spans failures, such as those that cause node(s) isolation, services (from the same wavelength but on different spans) may contend for access to the same protection channel. This yields a potential for misconnected traffic.