Modified Backoff Algorithm with Station Number Adaptiveness for IEEE 802.11 Wireless LANs

Huirae CHO  Sin-Chong PARK  

Publication
IEICE TRANSACTIONS on Communications   Vol.E86-B   No.12   pp.3626-3629
Publication Date: 2003/12/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
Keyword: 
802.11,  backoff algorithm,  contention window,  

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Summary: 
The IEEE 802.11 WLAN standards adopt CSMA/CA protocol with a backoff algorithm as medium access control technique. When the number of stations which attempt to access a network increases, the throughput efficiency of the standard goes down. In this paper, we propose a modified backoff algorithm which adaptively selects the Contention Window (CW) size according to the variation of the number of contending stations and present the results of simulation analysis.