01718nas a2200145   4500008004100000245008700041210006900128260001500197300001300212520113700225100002101362700001901383700002201402856014801424       2011                        eng d00aAn Improved GMPLS Survivability Mechanism Using Link Delay - Constrained Algorithm0 aImproved GMPLS Survivability Mechanism Using Link Delay Constrai  cJuly 18-21  a 45 - 503 aIt is widely accepted that GMPLS (Generalized MPLS) will be a key technology in the evolution of the next generation of reliable Internet Protocol (IP) backbone networks. Conventional GMPLS-based optical-switching network fault recovery only provides resiliency in terms of path segment selection instead of constraint-based calculation. This can create severe impact on the protocol?s transport plane when a fault occurs to a link or path with many optical connections attached to it. This paper proposes the implementation of an improved GMPLS recovery algorithm based on the metric of optical link delay which is achieved through the pre or post selection of a safer and more stable protection path with fewer connections attached to it, and therefore with a lesser link delay metric compared to other possible paths. The improved recovery algorithm is evaluated using the network simulator ns-2 and more particularly a specialized simulator add-on for GMPLS, called ASONS (ASONS - An Automatically Switched Optical Network Simulator). The results indicate improved resiliency, increased fault avoidance, and reduced packet loss.1 aBouras, Christos1 aStamos, Kostas1 aBikos, Anastasios  uhttps://telematics.upatras.gr/telematics/publications/improved-gmpls-survivability-mechanism-using-link-delay-constrained-algorithm?language=el