BLOCKING ANALYSIS OF TIME-DIVISION MULTIPLEXED MULTICAST SWITCH WITH INTERMEDIATE CHANNEL GROUPING

The blocking performance of circuit switched traffic in a multicast sw itch with intermediate channel grouping is investigated. The particula r switch concerned here is a three-stage time-space-time (TST) interco nnection network and performs time-division circuit switching. The inp ut and output stages are time slot interchangers (TSI). The central st age is a time-multiplexed switch with two ports per address. By exploi ting the channel grouping at the central stage as well as reducing the average loading at each internal frame, the three-stage multicast swi tch has potential to remove almost all slot contention blocking.