A new function for optimization of working paths in survivable MPLS networks

Abstract

We consider the problem of working paths optimization in survivable MPLS network. Both restoration methods: global and local repair are addressed. We focus on an existing facility network, in which only network flows can be optimized to provide network survivability. The lost flow due to a single failure of a network link is applied as the performance metric. Since joint optimization of working and recovery paths is very complex, we suggest to partition the problem into two simpler subproblems and first optimize working routes. We introduce a new objective function for optimization of working routes and propose a heuristic algorithm to solve the considered problem. Next, simulation performance of various methods for working paths assignment is examined. © Springer-Verlag Berlin Heidelberg 2006.