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A disjoint path selection scheme with SRLG in GMPLS networks

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4 Author(s)
Oki, E. ; NTT Network Innovation Labs., NTT Corp., Tokyo, Japan ; Matsuura, N. ; Shiomoto, K. ; Yamanaka, N.

This paper proposes a disjoint path selection scheme for generalized multiprotocol label switching (GMPLS) networks with shared risk link group (SRLG) constraints. It is called the weighted-SRLG (WSRLG) scheme. It treats the number of SRLG members related to a link as part of the link cost when the k-shortest path algorithm is executed. In WSRLG, a link that has many SRLG members is rarely selected as the shortest path. Simulation results show that WSRLG finds more disjoint paths than the conventional k-shortest path algorithm. In addition, since WSRLG searches for the weight of the SRLG factor by using a binary search algorithm while satisfying the required number of disjoint paths between source and destination nodes so that the cost of a path set can be minimized, it can find the most cost-effective disjoint paths.

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High Performance Switching and Routing, 2002. Merging Optical and IP Technologies. Workshop on

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