Research Article
Applying Active Measurement in the Rate Adaptation for 802.11 Wireless Networks
@INPROCEEDINGS{10.4108/ICST.WICON2008.4802, author={Shaohe Lv and Xiaodong Wang and Xingming Zhou}, title={Applying Active Measurement in the Rate Adaptation for 802.11 Wireless Networks}, proceedings={4th International ICST Conference on Wireless Internet}, publisher={ICST}, proceedings_a={WICON}, year={2010}, month={5}, keywords={Rate adaptation MAC 802.11}, doi={10.4108/ICST.WICON2008.4802} }- Shaohe Lv
Xiaodong Wang
Xingming Zhou
Year: 2010
Applying Active Measurement in the Rate Adaptation for 802.11 Wireless Networks
WICON
ICST
DOI: 10.4108/ICST.WICON2008.4802
Abstract
Rate Adaptation (RA) is a mechanism to choose transmission rate based on the dynamic channel quality in wireless networks. The adaptation algorithm run solely at the sender side in 802.11 networks is studied. The key insight is the inference discrepancy in inferring the relative order of the expected performance of candidate rate, which argues that one can not always reach the correct order based on the channel state information collected exclusively by the sender itself. The consequence is wrong rate decision and significant performance loss. Therefore, a new RA structure is proposed to mitigate such effect by a novel component, rate testing. By embracing the active measurement, a lightweight and effective testing mechanism SFB, short frame burst, is proposed to detect and filter out the unsuitable transmission rate. Finally, an active measurement-based rate adaptation mechanism (AMRA) is designed and implemented. The experiments show that AMRA outperforms many other well-known RA solutions in most scenarios.
