Shared Path Protection for Bandwidth Guaranteed Connections in Multi-Domain Networks

Abstract

Shared path protection routing for bandwidth guaranteed connections in multi-domain networks is difficult due to the lack of complete and global knowledge on the network topology and bandwidth allocation. To overcome this difficulty, we propose an aggregated network modelling by overestimation and a two-step routing strategy. In the first step, a rough routing solution is sketched in a compact network which is the topology aggregation of the multi-domain network. A complete routing is then determined by solving routing problems within the original single-domain networks. Each routing step can be solved by either using an exact mathematical or a heuristic method. Computational results show the relevance of the aggregate network modelling and the scalability as well as the efficiency of the proposed routing for multi-domain networks.