Presentation	2006-03-02 Window control for fairness issue between uplink and downlink flows in IEEE 802.11 wireless LANs B. A. Hirantha Sithira ABEYSEKERA, Takahiro MATSUDA, Tetsuya TAKINE,
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Abstract(in English)	This paper considers a fairness issue between uplink and downlink flows in IEEE 802.11 wireless LAN, where uplink flows dominate over downlink flows in terms of wireless bandwidth usage. We propose a simple solution to improve the fairness among all flows by means of adjusting the minimal contention window size (CW_) at the access point. Note here that CW_ is a parameter of IEEE 802.11 MAC protocol. The proposed scheme can be easily implemented, because no modification is required in the MAC protocol of wireless terminals. Furthermore the proposed scheme requires only the number of downlink flows in adjusting CW_ at the access point, even though the throughput of each flow is determined by the numbers of downlink and uplink flows in general. We evaluate the performance of the proposed scheme for TCP and UDP traffic flows through simulation experiments.
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Keyword(in English)	wireless LAN / contention window / fairness / uplink / downlink / bidirectional traffic
Paper #	IN2005-171
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Committee	IN
Conference Date	2006/2/23(1days)
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Registration To	Information Networks (IN)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Window control for fairness issue between uplink and downlink flows in IEEE 802.11 wireless LANs
Sub Title (in English)
Keyword(1)	wireless LAN
Keyword(2)	contention window
Keyword(3)	fairness
Keyword(4)	uplink
Keyword(5)	downlink
Keyword(6)	bidirectional traffic
1st Author's Name	B. A. Hirantha Sithira ABEYSEKERA
1st Author's Affiliation	Graduate School of Engineering, Osaka University()
2nd Author's Name	Takahiro MATSUDA
2nd Author's Affiliation	Graduate School of Engineering, Osaka University
3rd Author's Name	Tetsuya TAKINE
3rd Author's Affiliation	Graduate School of Engineering, Osaka University
Date	2006-03-02
Paper #	IN2005-171
Volume (vol)	vol.105
Number (no)	628
Page	pp.pp.-
#Pages	6
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