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Stability of frame-based maximal weight matching algorithms with reconfiguration delays

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2 Author(s)
Xike Li ; Dept. of Electr. & Comput. Eng., Tennessee Univ., Knoxville, TN, USA ; I. Elhanany

It has been shown that maximal weight matching algorithms for input-queued switches are stable under any admissible traffic conditions with a speedup of 2. As link speeds increase, the computational complexity of these algorithms limits their applicability in high port-density switches and routers. In frame-based maximal weight matching (FMWM), a new scheduling decision is generated once every several packet times, as opposed to on a packet-by-packet basis. Between new scheduling decisions, the configuration of the crossbar switch remains unchanged. We show that the FMWM algorithm is also stable with a speedup of 2 and obtain the speedup required for stability in systems with non-negligible reconfiguration delays. Simulation results illustrate the impact of the frame size on the delay experienced by arriving packets under different traffic scenarios.

Published in:

HPSR. 2005 Workshop on High Performance Switching and Routing, 2005.

Date of Conference:

12-14 May 2005