Modeling and Analysis of Improved IEEE 802.11DCF

doi:10.13190/j.jbupt.2014.05.020

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2014, Vol. 37 ›› Issue (5): 96-99.doi: 10.13190/j.jbupt.2014.05.020

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Modeling and Analysis of Improved IEEE 802.11DCF

TANG Lun, LIU Yi-fu, LIU Qing-hai, CHEN Qian-bin

Key Laboratory of Mobile Communication Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received:2013-12-12 Online:2014-10-28 Published:2014-11-07

Abstract

Abstract:

In view of shortcomings of distributed coordination function (DCF) in IEEE 802.11 series standard, a simple but effective improved DCF mechanism was proposed. Main improvements are focuing on the size of backoff window and it's probability was chosen in 0 backoff stage: doubling the backoff window size of 0 backoff stage based on original mechanism and using probability p to divide the window size of 0 backoff stage into two parts. For purpose of reflecting the performance accurately, a comprehensive analytic model was constructed. We compare it with the classical DCF scheme and numerical simulation. It is shown that the new DCF mechanism has better performs than that of classical DCF in the case of dense terminal and heavy offered load.

Key words: distributed coordination function, Markov model, unsaturated situation, quality of service

CLC Number:

TN929.53

TANG Lun, LIU Yi-fu, LIU Qing-hai, CHEN Qian-bin. Modeling and Analysis of Improved IEEE 802.11DCF[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2014, 37(5): 96-99.

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Modeling and Analysis of Improved IEEE 802.11DCF

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