Performance evaluation of Dual Crosspoint Queued crossbar packet switch

This paper presents an analysis of new Dual Crosspoint Queued (DCQ) crossbar switch architecture. It is well-known that in order to achieve performance guarantees, the priority separation of incoming traffic is necessary. Therefore, we modified CQ crossbar switch with the separation of different traffic flows, by implementing two buffers in each crosspoint of switch fabric. Different round robin based scheduling algorithms are presented and analyzed. With the particular attention on the cell delay and cell loss probability, results of simulations show that proposed switch architecture can achieve desired QoS only for the high priority traffic flow.