Contention window optimization for ieee 802.11 DCF access control

Der Jiunn Deng, Chih Heng Ke, Hsiao Hwa Chen, Yueh Min Huang

Research output: Contribution to journalArticle

129 Citations (Scopus)

Abstract

According to the latest version of the IEEE 802.11 standard, the backoff parameters of its collision avoidance mechanism are far from optimal, especially in a heavy load or error-prone WLAN environment. This strategy has a high collision probability and channel utilization is degraded in bursty arrivals or congested scenarios. Besides, the standard backoff mechanism may treat noise corruption as packet collisions. In this paper, we identify the relationship between backoff parameters, contention level, and channel BER in order to propose a simple, but yet well-performing distributed algorithm that allows a station to dynamically adjust its contention window size based on turn-around-time measurement of channel status. In addition to theoretical analysis, simulations are conducted to evaluate its performance. The proposed scheme works very well in providing a substantial performance improvement in heavy loaded and error-prone WLAN environments.

Original languageEnglish
Article number4712731
Pages (from-to)5129-5135
Number of pages7
JournalIEEE Transactions on Wireless Communications
Volume7
Issue number12
DOIs
Publication statusPublished - 2008 Dec 1

Fingerprint

Wireless LAN
Contention
Wireless local area networks (WLAN)
Access Control
Access control
Collision
Turnaround time
Optimization
Collision Avoidance
IEEE 802.11
Collision avoidance
Distributed Algorithms
Time measurement
Parallel algorithms
Theoretical Analysis
Scenarios
Evaluate
Simulation
Standards
Relationships

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Deng, Der Jiunn ; Ke, Chih Heng ; Chen, Hsiao Hwa ; Huang, Yueh Min. / Contention window optimization for ieee 802.11 DCF access control. In: IEEE Transactions on Wireless Communications. 2008 ; Vol. 7, No. 12. pp. 5129-5135.
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Contention window optimization for ieee 802.11 DCF access control. / Deng, Der Jiunn; Ke, Chih Heng; Chen, Hsiao Hwa; Huang, Yueh Min.

In: IEEE Transactions on Wireless Communications, Vol. 7, No. 12, 4712731, 01.12.2008, p. 5129-5135.

Research output: Contribution to journalArticle

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