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Published Articles >> Table of Contents >> Abstract
Second Annual Conference on Wireless On-demand Network Systems and Services (WONS'05)
pp. 190-199
Distributed Contention Control in Heterogeneous 802.11b WLANs
Raffaele Bruno, Italian National Research Council (CNR) - IIT Institute, Italy
Marco Conti, Italian National Research Council (CNR) - IIT Institute, Italy
Enrico Gregori, Italian National Research Council (CNR) - IIT Institute, Italy
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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/WONS.2005.12
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| Abstract |
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Several feedback-based mechanisms have been proposed
to maximize the IEEE 802 .11 MAC protocol efficiency by
guaranteeing an optimal time-spreading of users' channel
accesses. However, these solutions suffer from a significant
unfairness problem in the presence of stations adopting the
standard binary exponential backoff algorithm. Generally,
a few legacy stations are sufficient to completely starve enhanced
stations employing a modified 802 .11 MAC protocol
that adapts the backoff to the network contention level.
In this paper we propose a credit-based scheme to enforce
fairness in heterogeneous networks. Specifically, enhanced
stations earn credits when releasing transmission opportunities
granted by the standard protocol. The credits are a
virtual currency spent by the enhanced stations to reclaim
new transmission opportunities. In this paper, we apply our
solution to the distributed mechanism for contention control
named AOB. Simulation results show the effectiveness
of the proposed mechanism in all the network scenarios considered.
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 Additional Information
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Citation:
Raffaele Bruno, Marco Conti, Enrico Gregori,
"Distributed Contention Control in Heterogeneous 802.11b WLANs,"
wons,
pp. 190-199,
Second Annual Conference on Wireless On-demand Network Systems and Services (WONS'05),
2005
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