On-Arrival Planning for Sub-Graph Routing Protection in WDM Networks

Abstract

In this paper we incorporate the rerouting of backup paths to the Call Admission Control algorithm of Sub-Graph Routing Protection (SGRP). Sub-Graph Routing Protection with On-Arrival Planning (SGRP-OAP) has the twofold benefit of strongly reducing the blocking probability of the protected system while eliminating the physical rerouting of established connections, which is a major drawback of the original proposal of SGRP. The new scheme is so capacity-efficient that, for all investigated topologies, at low traffic intensity the blocking probability of the system protected against single link failures is the same as the blocking probability of the unprotected system. This is possible because the new protection scheme is extremely effective in using the idle network capacity to provide backup paths.

Proteção por Roteamento em Sub-Grafos em Redes WDM de Caminhos Ópticos

“…O planejamento na chegada [6] é análogo ao IAP, porém é realizado antes da aceitac ¸ão da requisic ¸ão. O desempenho em capacidade do OAP é ainda melhor que o do RWA sem restric ¸ões, com a grande vantagem de que a realocac ¸ão altruísta é completamente eliminada.…”