Mobility Investigate

Efficient Rate Adaptation With QoS Support for Wireless Networks

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Executive Summary

Wireless LANs (WLANs) suffer degrading performance when operating within domestic areas due to multiple reasons such as: multi-path, fading, path loss and user mobility. To overcome this, transmission rate is usually adjusted to a more error-resistant rate. In this paper, the authors first present a novel rate adaptation algorithm for IEEE 802.11 that can efficiently identify the threshold Frame Error Rate (FER) at which link adjustment is required, based on a simple throughput analysis at the MAC layer. Then, they extend their rate adaptation algorithm to support IEEE 802.11e Quality of Service (QoS) requirements.

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