Localized asynchronous packet scheduling for buffered crossbar switches

Buffered crossbar switches are a special type of crossbar switches. In such a switch, besides normal input queues and output queues, a small buffer is associated with each crosspoint. Due to the introduction of crosspoint buffers, output and input contention is eliminated, and the scheduling process for buffered crossbar switches is greatly simplified. Moreover, crosspoint buffers enable the switch to work in an asynchronous mode and easily schedule and transmit variable length packets. Compared with fixed length packet scheduling or cell scheduling, variable length packet scheduling, or packet scheduling for short, has some unique advantages: higher throughput, shorter packet latency and lower hardware cost. In this paper, we present a fast and practical scheduling scheme for buffered crossbar switches called Localized Asynchronous Packet Scheduling (LAPS). With LAPS, an input port or output port makes scheduling decisions solely based on the state information of its local crosspoi...

• Type: Conference
• Year: 2006
• Where: ANCS
• Authors: Deng Pan, Yuanyuan Yang
• Keywords: ANCS 2006, Computer Networks, Crossbar Switches, Crosspoint Buffers, Packet Scheduling