Scheduling for Next Generation Wlans: Filling the Gap Between Offered and Observed Data Rates

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Executive Summary

In wireless networks, opportunistic scheduling is used to increase system throughput by exploiting multi-user diversity. Although recent advances have increased physical layer data rates supported in Wireless Local Area Networks (WLANs), actual throughput realized are significantly lower due to overhead. Accordingly, the frame aggregation concept is used in next generation WLANs to improve efficiency. However, with frame aggregation, traditional opportunistic schemes are no longer optimal. In this paper, the authors propose schedulers that take queue and channel conditions into account jointly, to maximize throughput observed at the users for next generation WLANs.

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