Error Bound of Collision Probability Estimation in Non-saturated IEEE 802.11 WLANs

Hyogon KIM  Jongwon YOON  Heejo LEE  

IEICE TRANSACTIONS on Communications   Vol.E90-B   No.7   pp.1884-1885
Publication Date: 2007/07/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.7.1884
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Terrestrial Radio Communications
IEEE 802.11,  collision probability,  non-saturated model,  contention window,  clear channel assessment,  

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We analytically prove that the error in the channel idle time-based collision probability estimation in face of non-saturated stations is bounded by 2/(CWmin+1) in the IEEE 802.11 wireless LANs (WLANs). This work explicitly quantifies the impact of non-saturation, and the result vindicates the use of the estimation technique in real-life IEEE 802.11 WLANs, in such applications as the acknowledgement-based link adaptation and the throughput optimization through contention window size adaptation.