NDLI: An effective collision resolution mechanism for wireless LAN

Content Provider	IEEE Xplore Digital Library
Author	Chonggang Wang Bin Li Bo Li Sohraby, K.
Copyright Year	2003
Description	Author affiliation: Dept. of Comput. Sci., Hong Kong Univ. of Sci. & Technol., Kowloon, China (Chonggang Wang)
Abstract	Based on the current standardized IEEE 802.11 distributed coordination function (DCF) protocol, this paper proposes a new efficient collision resolution mechanism, called GDCF (gentle DCF). Our main motivation is based on the observation that 802.11 DCF decreases the contention window to the initial value after each success transmission, which essentially assumes that each successful transmission is an indication that the system is under low traffic loading. GDCF takes a more conservative measure by halving the contention window size after c consecutive successful transmissions. This "gentle" decrease lowers the collision probability, especially when the competing node number is large. We compute the optimal value for c, and the numerical results from both analysis and simulation demonstrate that GDCF significantly improve the performance of 802.11 DCF including throughput, fairness, and energy efficiency. In addition, GDCF is flexible for supporting priority access by selecting different values of c for different traffic types; it is fully compatible with the original 802.11 DCF, and simple to implement, as it does not requires changes in control message structure and access procedures in DCF.
Sponsorship	China Comput. Federation IEEE Comput. Soc. Beijing Center IEEE Comput. Soc. Tech. Committee on Distributed Process. Shanghai Comput. Soc
Starting Page	18
Ending Page	25
File Size	331627
Page Count	8
File Format	PDF
ISBN	0769520332
DOI	10.1109/ICCNMC.2003.1243022
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-10-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless LAN Road accidents Traffic control Protocols Telecommunication traffic Size measurement Performance analysis Computational modeling Analytical models Throughput
Content Type	Text
Resource Type	Article

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