Rate-based Paced XCP for Small Buffered Optical Packet Switched Networks(MPλ(Lambda)S,フォトニックネットワーク/制御,光波長変換,スイッチング,PON,一般)

概要

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One of the difficulties of OPS networks is buffering optical packets in the network. O(1) reading operation is not possible in the optical domain, because there is no equivalent optical RAM available for storing packets. Currently, the only solution that can be used for buffering in the optical domain is using long fiber lines called Fiber Delay Lines (FDL). However, FDLs provide only a small and fixed amount of delay. Thus, burstiness of Internet traffic and short-term over-utilizations cause high packet drop rates in small and fixed delayed OPS networks. In this paper, we propose an architecture using a XCP-based congestion control algorithm specially designed for OPS WDM networks with pacing at edge nodes for minimizing the buffer requirements at core nodes. We show how the FDL requirements change with the number of flows on a wavelength, FDL granularity and packet size distribution by using a dumbbell topology.
社団法人電子情報通信学会の論文
2006-05-18