A high speed integrated service switch based on 4×4 switching elements

A high-speed, integrated service switch built around a banyan multistage interconnection network (MIN) with 4×4 elements is proposed and studied. The architecture is similar to that of the fast-packet/circuit (FPC) switch. It employs n bit-parallel lines in the MIN to reduce contention and is capable of supporting integrated voice-data-video communications. The tagged-job method is used to formulate a model for the 4×4 switching element, and it is noted that this technique extends directly to the analysis of larger n×n switching elements. Performance evaluation of the switch provides throughput and delay results for fast packet switching which supports voice and data and blocking-and-loss probability behavior for circuit-switched (CS) circuit setup which supports real-time traffic such as fixed-rate video. A performance comparison shows that this switch has a higher maximum throughput than but similar delay behavior to the FPC switch for packet switching. However, its blocking-and-loss probability for CS circuit setup is significantly smaller under identical traffic conditions