Analysis of Temporal and Throughput Fair Scheduling in Multirate WLANs

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Executive Summary

The IEEE 802.11e Wireless Local Area Network (WLAN) provides controlled access features that can be used in conjunction with scheduling algorithms to provide guaranteed per-session services. However, the multi-rate operation of the WLAN complicates the design of scheduling and Quality of Service (QoS) provisioning algorithms. The authors propose a new solution based on Controlled Access Phase Scheduling (CAPS) framework, introduced for fixed rate WLANs in their earlier works, and employ a new fair central scheduler to achieve guaranteed fair services in a WLAN. They examine the fairness issues involved in designing such an algorithm and study several fair scheduling algorithms that can be used with CAPS.

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