MULTIACCESS PROCESSOR INTERCONNECTION USING SUBCARRIER AND WAVELENGTH-DIVISION MULTIPLEXING

The optical technology contributes significantly to high speed long di stance communications and local area networks (LAN's). The wavelength division multiplexing (WDM) and the subcarrier multiplexing (SCM) are two technologies widely employed to fully utilize the huge bandwidth a vailable on optical fibers and alleviate the speed mismatch between th e components in the electronic domain and those in the optical domain. In this paper, we extend these technologies to parallel processing mu lticomputers. The design philosophy is to incorporate advantages of bo th the WDM and the SCM into the multiaccess processor interconnection for multicomputers. The objective is to provide high bandwidth and hig h data rate under the physical limits and the performance requirements . A novel interprocessor architecture, the receiver oriented architect ure (ROA), is proposed. Based on the passive optical star coupler, the ROA has been implemented and referred as ROA-SC which is single-hop a ccessible and optically self-routing. The implementation also speeds u p the processing in the electronic domain. Besides, the presentation i ncludes three media access protocols for both the reservation and the preallocation approaches. Extensive analysis has been performed and th e proposed RO;ISC is found to have very good modularity and scalabilit y so that it is very suitable for practical applications.