Abstract

Two stateless path computation element (PCE) implementations to be used in GMPLS-based wavelength routed optical networks (WRONs) are discussed (fully stateless PCE, F-SL-PCE, and contention avoidance stateless PCE, CA-SL-PCE). The proposed CA-SL-PCE implementation exploits static management information for avoiding resource contentions among subsequent lightpath requests, while preserving network scalability. Simulation results show the capability of CA-SL-PCE implementation in strongly reducing resource contentions, thus resulting in a significant reduction of the overall blocking probability. Download