Modeling Channel Access Delay and Jitter of IEEE 802.11 DCF

Authors:
Yun Li;Chonggang Wang;Keping Long;Weiliang Zhao
Affiliations:
Chongqing University of Posts & Telecommunications, Chongqing, China 400065;University of Arkansas, Fayetteville, USA 72701;Chongqing University of Posts & Telecommunications, Chongqing, China 400065 and Research Centre for Optical Internet and Mobile Information Networks, University of Electronic Science and Technolog ...;Chongqing University of Posts & Telecommunications, Chongqing, China 400065
Venue:
Wireless Personal Communications: An International Journal
Year:
2008

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Abstract

With the ever-increasing requirement of WLAN to support real-time services, it is becoming important to study the delay properties of WLAN protocols. This paper constructs a new model to analyze the channel access delay and delay jitter of IEEE 802.11 DCF in saturation traffic condition. Based on this analytical model, average channel access delay and delay jitter are derived for both basic access and RTS/CTS-based access scheme. The accuracy of the analytical model is validated by simulations and furthermore we discuss the impact of initial contention window, maximal backoff stage, and packet size on channel access delay and delay jitter of 802.11 DCF using the proposed model.