Network Protection

Span-protecting p-Cycles are a type of span protection technique. “p” stands for “protection” and “preconfigured.” The traditional span restorable network performs restoration at the two end nodes of a link, and shows much better spare capacity efficiency but requires a relatively longer restoration time than the ring techniques. Better than the span-restorable technique, span-protecting p-cycles [...]

Span restoration is type of mesh-based restoration technique. Upon a link failure, the technique performs restoration at the end two nodes of a failed link, which loopbacks all the affected service flows locally onto a route that bypass the failed link. Fig. 1(a) shows an example of span restoration. A fiber cut of link (1-2) [...]