An effective medium contention method to improve the performance of IEEE 802.11

Authors:
Wen-Tzu Chen
Affiliations:
Institute of Telecommunications Management, National Cheng Kung University, Tainan City, Taiwan
Venue:
Wireless Networks
Year:
2008

Citing 6
Cited 1

Performance modeling of asynchronous data transfer methods of IEEE 802.11 MAC protocol

Wireless Networks
Dynamic tuning of the IEEE 802.11 protocol to achieve a theoretical throughput limit

IEEE/ACM Transactions on Networking (TON)
802.11 Wireless Networks: The Definitive Guide

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Supporting QoS in IEEE 802.11e wireless LANs

IEEE Transactions on Wireless Communications
Performance analysis of the IEEE 802.11 distributed coordination function

IEEE Journal on Selected Areas in Communications
Saturation throughput analysis of IEEE 802.11e enhanced distributed coordination function

IEEE Journal on Selected Areas in Communications

Flow rank based probabilistic fair scheduling for wireless ad hoc networks

Wireless Networks

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Abstract

In this paper, we propose an effective medium access mechanism to enhance performance of the IEEE 802.11 distributed coordination function (DCF). One of the primary issues of 802.11 is a contention-based medium access control (MAC) mechanism over a limited medium, which is shared by many mobile users. In the original 802.11 DCF, the binary exponential backoff algorithm with specific contention window size is employed to coordinate the competition for shared channel. Instead of binary exponential increase, we adopt linear increase for the contention window that is determined according to the competing number of nodes. We also assume that the access point can broadcast the number of mobile nodes to each station through management frames. An analytical model is developed for the throughput performance of the wireless medium. Using simulation results from the NS2 simulator, we show that our model can accurately predict the system saturation throughput, and can obtain better performance in terms of throughput, fairness, and packet drop.