Nonblocking broadcast switching networks

Results are presented for nonblocking multistage broadcast networks wherein a request from an idle input port to be connected to some set of idle output ports can be satisfied without any disturbance of other broadcast connections already existing in the network. Furthermore, a linear network control algorithm for realizing such a broadcast connection request is given. These results represent the best known explicit constructions with limited numbers of stages relative to both crosspoint and control algorithm complexity. Thus, these networks are highly useful for practical applications involving the movement of and collaboration with voice/video/text/graphics information that require broadcast capability. These networks are also useful for the interconnection of processor and memory units in parallel processing systems