Path Segment Protection p-Cycle for Span Failure in Optical Networks
نویسندگان
چکیده
The path-segment-protecting p-cycles (“flow p-cycles” for short) have capacity efficiency near that of the Shared Backup Path-Protection (SBPP) scheme currently favoured for optical networking. In this paper a significant extension to the method of p-cycle is introduced for network protection. The Flow p-cycle is use to protect path segments of adjacent workingflow, directly straddle the p-cycle or not only spans that lie on the cycle. This effectively extends the p-cycle technique to incorporate path protection or protection of any flow segment on a path, same as the original span protecting use of p-cycles. The work in the present paper is to optimize the spare capacity of path segment protecting p-cycle by using an improved IPL model which determine the required number of copies of p-cycle for the network and number of spare units on each span.
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