Our prototype of a fully-functional Asynchronous Transfer Mode ATM switch validates the design of a 128 Gb s optoelectronic ATM switch. Optoelectronics, rather than all optical componets, are used to simutaneously address all of the speci c requirements mandated by the ATM protocol. In this paper, we present the Illinois Pulsar-based Optical Interconnect iPOINT testbed, and present our results obtained for the prototype switch i n a w orking environment consisting of an optical network of Sun SPARCStations and other local and wide-area ATM switches.
FPGA technology has been used for the development and implementation of a prototype input queuing module of the Illinois Pulsar-based Optical INTconnect (iPOINT) Asynchronous Transfer Mode (ATM) testbed. Pipeline techniques were extensively used to solve timing problems and increase throughput. This prototype queuing module has been fully tested for bandwidth of 100 Mbps.
Input queuing has advantages for building ultra-broadband ATM switches with the throughput beyond 100Gb/s because it imposes minimal memory bandwidth requirements. Using a novel Multi-Tag-Queue (MTQ) input module and a novel Matrix-Unit-Cell-Scheduling (MUCS) module, our input queue-based ATM switch avoids head-of-line blocking and provides almost 100% utilization. In a 32-port configuration, the switch can deliver an aggregate throughput of 128Gb/s.
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