Computer Science – Networking and Internet Architecture
Scientific paper
2009-12-03
International Journal of Computer Science and Information Security, IJCSIS, Vol. 6, No. 2, pp. 048-054, November 2009, USA
Computer Science
Networking and Internet Architecture
7 pages IEEE format, International Journal of Computer Science and Information Security, IJCSIS November 2009, ISSN 1947 5500,
Scientific paper
In optical WDM networks, since each lightpath can carry a huge mount of traffic, failures may seriously damage the end user applications. Hence fault tolerance becomes an important issue on these networks. The light path which carries traffic during normal operation is called as primary path. The traffic is rerouted on a backup path in case of a failure. In this paper we propose to design a reliable and fault tolerant routing algorithm for establishing primary and backup paths. In order to establish the primary path, this algorithm uses load balancing in which link cost metrics are estimated based on the current load of the links. In backup path setup, the source calculates the blocking probability through the received feedback from the destination by sending a small fraction of probe packets along the existing paths. It then selects the optimal light path with the lowest blocking probability. Based on the simulation results, we show that the reliable and fault tolerant routing algorithm reduces the blocking probability and latency while increasing the throughput and channel utilization.
Ramesh G.
SundaraVadivelu S.
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