An Enhanced Autorate Algorithm for Wireless Local Area Networks Employing Loss Differentiation

TitleAn Enhanced Autorate Algorithm for Wireless Local Area Networks Employing Loss Differentiation
Publication TypeJournal Article
Year of Publication2008
AuthorsPang, Q., V. C. M. Leung, and S. C. Liew
JournalVehicular Technology, IEEE Transactions on
Volume57
Pagination521 -531
Date Publishedjan.
ISSN0018-9545
Keywordsautomatic rate fallback algorithm, autorate algorithm, channel allocation, channel condition, medium access control protocol, wireless LAN, wireless local area network, WLAN
Abstract

Channel conditions in wireless local area networks (WLANs) are variable due to mobility and interference. Autorate algorithms are commonly used in WLANs to maximize the data rate over the variable physical channel. However, the widely used automatic rate fallback (ARF) algorithm does not work properly in the presence of multiaccess collisions due to its inability to differentiate frame losses caused by link errors from those caused by collisions. This paper proposes an improved ARF algorithm that is capable of differentiating between these two types of losses with minimal modifications to the existing medium access control protocol. The performance evaluations show substantial throughput improvements over ARF and other existing algorithms.

URLhttp://dx.doi.org/10.1109/TVT.2007.905418
DOI10.1109/TVT.2007.905418

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