On the unfair channel access phenomenon in wireless LANs

Author

Pries, Rastin ; Staehle, Dirk ; Oechsner, Simon ; Menth, Michael ; Menth, Stefan ; Tran-Gia, Phuoc

Author_Institution

Inst. of Comput. Sci., Univ. of Wurzburg, Wurzburg, Germany

fYear

2009

fDate

15-17 Sept. 2009

Firstpage

1

Lastpage

8

Abstract

This paper shows that the relative collision probability for packets in wireless LAN 802.11 networks decreases with increasing load offered by the respective station. This denotes a clearly unfair channel access which is important to be aware of, e.g., when collision probabilities are measured and used for reactive control of contention windows. We model the unfair channel access phenomenon analytically and semi-analytically for bidirectional constant bit rate and unidirectional TCP traffic and compare the results with those from simulations.

Keywords

access protocols; carrier sense multiple access; probability; telecommunication congestion control; telecommunication traffic; transport protocols; wireless LAN; wireless channels; bidirectional constant bit rate; carrier sense multiple access; contention window reactive control; medium access control; packet collision probability; unfair channel access phenomenon; unidirectional TCP traffic; wireless LAN; Analytical models; Bit rate; Collision avoidance; Computer science; Downlink; Media Access Protocol; Multiaccess communication; Road accidents; Traffic control; Wireless LAN; 802.11; DCF; EDCA; Unfairness; Wireless LAN; channel access; collision probabilities;

fLanguage

English

Publisher

ieee

Conference_Titel

Teletraffic Congress, 2009. ITC 21 2009. 21st International

Conference_Location

Paris

Print_ISBN

978-1-4244-4744-2

Electronic_ISBN

978-2-912328-54-0

Type

conf

Filename

5300259