RookNet : A Rearrangeable Optical Network with High Speed Relay Processing

概要

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Various approaches on optical network systems using wavelength-division multiplexing (WDM) technique have been proposed. It is difficult to make a scale of WDM network larger since a number of the optical wavelength which can be used is limited. In order to make easily larger scale of network, multi-hop WDM network have been proposed . We have studied 2-hop network : Rook Net [1] which has simple routing algorithm and high network throughput. Nodes in Rook Net are divided into row groups and column groups and are placed in a mesh form. Packets are transferred between nodes over 1-hop or 2-hops. The 2-hop transfer means that a source node sends packets to a destination node via a relay node. When 2-hop traffic increases, relay processing time in a relay node is increasing. This is the reason that network throughput becomes low. To solve this problem is very important. In this paper, we show Rook Net rearrangement algorithm which replaces location of node within group so as to decrease the 2-hop traffic and to maintain high network through-put. Proposed rearrangement algorithm can achieve improvement of 10 percent in terms of throughput. We also propose Rook Net configuration which discriminates optical wavelength and subcarrier effectively in order to decrease the relay processing time.
社団法人電子情報通信学会の論文
1995-05-25