Providing QoS Guarantees in a Novel Switch Architecture
Li Hui · Dianzi xuebao · 2007
Using buffered crossbar as a core switch fabric,we build a combined input-crosspoint-output queued switch with space-division multiplexing expansion(denoted as SDM CICOQ switch) in this paper.It is proved that an SDM CICOQ switch with an expansion factor 2 can achieve 100% throughput and exactly emulate an OQ switch.Thus,SDM CICOQ switches can provide QoS guarantees for traffic flows.For the simplicity of implementation,we also present a hierarchical priority scheduling(HPS) scheme as a reference designing for the scheduling policy of the SDM CICOQ switch.Simulation results show that the SDM CICOQ switch operating under the HPS scheduling scheme can obtain good performance.