Cost and reliability comparison of some static and dynamic multilayer resilience schemes

Abstract

The aim of this paper is the analysis and the comparison of different resilience schemes in an IP over optical transport network. The properties which differentiate the resilience schemes considered in this work are: static vs. dynamic, with vs. without interaction between layers, relying vs. not relying on a common pool of back-up resources. The comparison has been performed from both an economic and a reliability performance viewpoint. The results obtained on a realistic case study show that the most advanced scheme (dynamic multilayer with common pool) allows interesting savings on resources and consequently costs. At the same it retains a network availability which is very close (practically equivalent) to the availability of static and more expensive schemes.