PR-banyan: a packet switch with a pseudorandomizer for nonuniform traffic

Buffered banyan networks are highly vulnerable to nonuniform traffic, due to the path sharing as well as the existence of only a single path per network input-output pair. Improving on an earlier packet distribution network which is a banyan network itself, a single-stage packet-scattering hardware, called the pseudo-randomizer (PR), is proposed. The PR-banyan, the PR followed by a buffered banyan, is analyzed under nonuniform traffic, and is shown to be highly effective under nonuniform traffic. The analytic results are shown to match the simulation results very closely