Dynamic tuning of the IEEE 802.11 protocol to achieve a theoretical throughput limit
IEEE/ACM Transactions on Networking (TON)
The Impact of Backoff, EIFS, and Beacons on the Performance of IEEE 802.11 Wireless LANs
IPDS '00 Proceedings of the 4th International Computer Performance and Dependability Symposium
Wireless Communications
Exploiting medium access diversity in rate adaptive wireless LANs
Proceedings of the 10th annual international conference on Mobile computing and networking
Cross Layer Design for IEEE 802.11 WLANs: Joint Rate Control and Packet Scheduling
LCN '05 Proceedings of the The IEEE Conference on Local Computer Networks 30th Anniversary
OMAR: Utilizing Multiuser Diversity in Wireless Ad Hoc Networks
IEEE Transactions on Mobile Computing
Multi-user diversity for IEEE 802.11 infrastructure wireless LAN
EUC'06 Proceedings of the 2006 international conference on Embedded and Ubiquitous Computing
Throughput maximization by utilizing multi-user diversity in slow-fading random access channels
IEEE Transactions on Wireless Communications
Achieving Multi-user Diversity Gain using User-Identity Feedback
IEEE Transactions on Wireless Communications
Distributed approaches for exploiting multiuser diversity in wireless networks
IEEE Transactions on Information Theory
A comparison of the HIPERLAN/2 and IEEE 802.11a wireless LAN standards
IEEE Communications Magazine
Sensor networks with mobile access: optimal random access and coding
IEEE Journal on Selected Areas in Communications
Improving power efficiency of CSMA wireless networks using multi-user diversity
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Effects of access phases lengths on performance of IEEE 802.15.6 CSMA/CA
Computer Networks: The International Journal of Computer and Telecommunications Networking
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The throughput of an IEEE 802.11 network decreases as the number of users increases because of the increased collision probability. To improve the throughput in the presence of a large population, this paper presents an opportunistic carrier-sense multiple-acces/collision-avoidance (CSMA/CA) scheme that exploits multi-user diversity while minimally modifying the IEEE 802.11 medium-access control. This method prioritizes those users having high signal-to-noise-ratio by granting earlier access to these users, thus improving the throughput. This prioritization, however, can cause repeated collisions of same users, which is similar to so-called head-of-line (HOL) blocking. To reduce the probability of the occurrence of the HOL blocking, a simple randomization is proposed. A probabilistic analysis shows that this scheme significantly reduces the HOL blocking probability. The simulation results show that the proposed method improves the throughput by as much as 100%, while achieving long-term fairness among users with different channel conditions.