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Efficient admission control of piecewise linear traffic envelopes at EDF schedulers

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3 Author(s)
Firoiu, V. ; Dept. of Comput. & Inf. Sci., Massachusetts Univ., Amherst, MA, USA ; Kurose, J. ; Towsley, D.

We present algorithms for flow admission control at an earliest deadline first link scheduler when the flows are characterized by piecewise linear traffic envelopes. We show that the algorithms have very low computational complexity and, thus, practical applicability. The complexity can be further decreased by introducing the notion of discretized admission control. Through discretization, the range of positions for the end points of linear segments of the traffic envelopes is restricted to a finite set. Simulation experiments show that discretized admission control can lead to two orders of magnitude decrease in the amount of computation needed to make admission control decisions over that incurred when using exact (nondiscrete) admission control, with the additional benefit that this amount of computation no longer depends on the number of flows. We examine the relative performance degradation (in terms of the number of flows admitted) incurred by the discretization and find that it is small

Published in:

Networking, IEEE/ACM Transactions on  (Volume:6 ,  Issue: 5 )

Date of Publication:

Oct 1998

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