Adaptive minimum contention window size algorithm under asymmetric traffic circumstances in WLAN

Home > Archive>Volume 39, Issue 8, 2016 >168-171

Adaptive minimum contention window size algorithm under asymmetric traffic circumstances in WLAN
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                        Li XuanLi Xuan
1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China; 2. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050,China; 3. Shanghai Research Center for Wireless Communication, Shanghai 201210, China
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Song GuannanSong Guannan
2. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050,China; 3. Shanghai Research Center for Wireless Communication, Shanghai 201210, China
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Wang Xinyu3Wang Xinyu
Shanghai Research Center for Wireless Communication, Shanghai 201210, China
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Zhang Zhijiang3Zhang Zhijiang
School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
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Affiliation:1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China; 2. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050,China; 3. Shanghai Research Center for Wireless Communication, Shanghai 201210, China
Clc Number:TP751
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Abstract:

With the number of mobile devices increasing rapidly, wireless local area networks (WLANs) based on 802.11 standard, are becoming more and more popular. All the stations (STA) including access point (AP) have the same traffic load because the 802.11 standard adopts equal throughput design model. But in real life, downlink traffic is almost always larger than uplink traffic. The design model of WLANs will limit downlink packets transmitting, so the asymmetric traffic loads between uplink and downlink is an important problem to solve. This paper gives a solution to solve this problem by adaptively adjusting minimum contention window (CWmin) of AP and STA based on the number of active stations (STAs).

Key words:WLAN; asymmetric traffic; throughput; adaptive

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Online: September 23,2016
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