Packetized smooth switching for buffered crossbar switches

Authors:
Hongtao Guan;Youjian Zhao;Jianping Wu;Xiaoping Zhang;Zhenhua Liu
Affiliations:
Tsinghua University, Beijing, P.R. China;Tsinghua University, Beijing, P.R. China;Tsinghua University, Beijing, P.R. China;Tsinghua University, Beijing, P.R. China;Tsinghua University, Beijing, P.R. China
Venue:
PDCS '07 Proceedings of the 19th IASTED International Conference on Parallel and Distributed Computing and Systems
Year:
2007

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Abstract

A sort of CICQ switches called the smoothed buffered crossbar or sBUX based on a new rate-based flow control scheme has been proposed in order to induce more scalability and predictability. However, sBUX supports fixed-length cells only, and the synchronization of input scheduling and output scheduling is required. In this paper, a new rate-based CICQ switch called sBUX+, which uses a novel packetized smoothed scheduler s-WF2Q as input and output schedulers, is proposed. It can support variable-length packet switching without fragmentation. In sBUX+, the buffer occupancy in the crosspoint is bounded by three packets with the longest length. The most appealing property of sBUX+ is the bounded packet departing time when supporting guaranteed services.