NetFailPAC: A Single Failure Protection Algorithm with QoS Provision for Optical WDM Networks

By sharing the protection bandwidth of high- priority connections (HPC) with the bandwidth of low- priority (LPC) ones, NetFailPAC (network failure protection algorithm with class of service) establishes working (HPC and LPC) and protection routes (for HPC only) in a WDM network. By using bandwidth as the main metric to select the working and backup paths, it outperforms previous proposals increasing high-priority connection setup capabilities from 0% to 50% without additional infrastructure, while maintaining similar network performance.