Indian Journal of Science and Technology

Abstract

Background/Objectives: Existing one-to-one, dedicated path-based and link-based MPLS-based recovery schemes are not resource efficient. We propose Common Protection Path, a novel protection scheme which ensures efficient utilization of resources. Methods/Statistical Analysis: Common Protection Path (CPP) selects a common protection path for traffic demands having the same ingress and egress routers. CPP factors in path failure probability and restoration priority levels of the traffic demands, unlike other schemes. We validated CPP algorithm using ns-2, over realistic network topology COST 239 with different link capacities. We compared CPP with one-to-one, dedicated path-based, link-based schemes and our modification of UNIFR (RFNS) i.e. UNIFR-similar. Findings: Our results show that using CPP scheme, more working bandwidth can be protected and more number of demands can be protected as compared to dedicated path-based, oneto-one, link-based and UNIFR-similar schemes. Our experimental results show that depending on the link capacity and the scheme taken for comparison, CPP provides up to 7.72% to 93.63% higher protection for COST 239 topology. Also with respect to restoration overbuild per Gbps protected bandwidth, CPP scheme is better as compared to other schemes. Applications/Improvements: Our results show that the CPP scheme results in efficient utilization of resources.

Keywords: Dedicated Path-Based, Link-Based, MPLS-Based Recovery, Protection Path