A rate adaptation algorithm for IEEE 802.11 WLANs based on MAC-layer loss differentiation

TitleA rate adaptation algorithm for IEEE 802.11 WLANs based on MAC-layer loss differentiation
Publication TypeConference Paper
Year of Publication2005
AuthorsPang, Q., V. C. M. Leung, and S. C. Liew
Conference NameBroadband Networks, 2005. BroadNets 2005. 2nd International Conference on
Pagination659 - 667 Vol. 1
Date Publishedoct.
Keywordsaccess protocols, automatic rate fallback algorithm, IEEE 802.11 WLAN, MAC-layer differentiation, physical link, rate adaptation algorithm, wireless channel condition, wireless channels, wireless LAN
Abstract

In a WLAN subject to variable wireless channel conditions, rate adaptation plays an important role to more efficiently utilize the physical link. However, the existing rate adaptation algorithms for IEEE 802.11 WLANs do not take into account the loss of frames due to collisions. In a WLAN with coexistence of multiple stations, two types of frame losses due to (a) link errors and (b) collisions over the wireless link can coexist and severely degrade the performance of the existing rate adaptation algorithms. In this paper, we propose a new automatic rate fallback algorithm that can differentiate the two types of losses and sharpen the accuracy of the rate adaptation process. Numerical results show that the new algorithm can substantially improve the performance of IEEE 802.11 WLANs.

URLhttp://dx.doi.org/10.1109/ICBN.2005.1589671
DOI10.1109/ICBN.2005.1589671

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