PERFORMANCE MODELING AND EVALUATION OF CIRCUIT SWITCHING USING CLOS NETWORKS

Call packing has been recognized as a routing scheme that significantl y reduces the blocking probability of connection requests in a circuit -switched Clos multistage interconnection network. In this brief contr ibution, for the first time, we develop general analytical models for the point-to-point blocking probability of the call-packing scheme app lied to Clos networks. By introducing a new parameter called the degre e of call packing, the models can correctly estimate the blocking prob ability of both call-packing and random routing schemes. The models ar e verified by computer simulation for various size networks and traffi c conditions.