A comparative study of one-to-many WDM lightwave interconnection networks for multiprocessors

Most of the proposed architectures for interconnecting processors in parallel systems are based on graph topologies. Recently, one-to-many topologies based on the hypergraph theory have emerged, taking advantage of the wavelength division multiplexing (WDM) technology that allows the huge bandwidth of optical fiber to be divided into several high-speed channels. One such channel can then be seen as a logical attribute shared among many processors. In this paper, we compare some hypergraph-based WDM lightwave networks in terms of simulated packet delivery time, average number of hops, link utilization, and throughput. We conclude that the bus-mesh, the hypertorus, and the stack-torus are very good candidates for implementing optical interconnection networks in future parallel systems.