Strategies and Concepts for Resilient Routing in Circuit-Switched Networked Systems

This chapter focuses on mechanisms of multi-hop resilient communications in connection-oriented systems. A particular focus is on approaches dedicated to circuit-switched wired networks providing transmission services on a per-flow rather than on a per-packet basis. It first outlines the architectural properties of ring networks together with the related resilience mechanisms. It next highlights the major schemes of resilient routing in mesh networks. In this context, it presents a taxonomy of resilient routing strategies according to six main criteria: backup path setup method, failure model, scope of recovery procedure, usage of recovery resources, and application of recovery schemes to multidomain and multilayer architectures of networked systems. Finally, it explains the components of the total recovery time for common architectures of communication networks.