A DISTRIBUTED COLLISION-FREE ACCESS CONTROL PROTOCOL FOR METRO AREA RING NETWORKS

摘要

Since network traffic of Metro Area Networks (MAN) shows asymmetric, burst, and highly dynamic, OBS becomes a compromise between enormous bandwidth of WDM and smaller flow of terminal individual users. Based on the analysis of several access control mechanisms of OBS metro ring network, this study presents a distributed collision-free (DCF) access control protocol. Using simple topology structure of ring network, this protocol assumes that all nodes in the ring networks are distributed evenly. Owing to adopting multi-token for data access control in ring network, which is not only for each data channel but also for node-to-node, the protocol realizes the unified controlling for bursts in time and space, and provides advantages of high bandwidth utilization, conflict-free, low latency and good scalability.