Optical Packet Switching Architecture based on Traffic Load Selective FDL Buffer Mode

Abstract

Contention resolution is one of the key issues for optical packet switching (OPS). An all optical fiber delay line (FDL) shared buffering architecture based on traffic load selective FDL buffer mode was brought forward to resolve the optical packet time contention. This traffic load selective FDL buffering architecture worked as expanded output shared buffer when the traffic load of incoming OPS input port is light. When the incoming traffic load is heavy, the proposed buffering architecture worked as feedback shared buffer to allow contended packet reenter the fiber delay line to reduce packet discarded. The analysis and simulation results show that the proposed FDL buffer architecture can decrease OPS node optical packet loss probability effectively and reduce required FDL number largely.