Unfairness problem in WLANs due to asymmetric co-channel interference and its mitigation

Author

Mahmud, Md Salek ; Uddin, Md Forkan

Author_Institution

Dept. of Electr. & Electron. Eng., Bangladesh Univ. of Eng. & Technol., Dhaka, Bangladesh

fYear

2014

fDate

8-10 March 2014

Firstpage

160

Lastpage

165

Abstract

Co-channel interference exists in IEEE 802.11 based wireless local area networks (WLANs) due to the limited number of non-overlapping channels in the current standards. In this paper, we investigate the impact of co-channel interference in carrier sense multiple access with collision avoidance (CSMA/CA) based WLANs via simulation. We find that the throughput unfairness among the users is severe in WLANs due to asymmetric co-channel interference among the users. We propose a centralized algorithm based on analytical analysis to configure the minimum contention window of the nodes to mitigate the throughput unfairness problem in WLANs. The performance of the proposed algorithm is evaluated by simulation and found to be very effective.

Keywords

carrier sense multiple access; cochannel interference; interference suppression; telecommunication congestion control; wireless LAN; CA; CSMA; IEEE 802.11; WLAN; analytical analysis; asymmetric cochannel interference mitigation; carrier sense multiple access; centralized algorithm; collision avoidance; minimum contention window; nonoverlapping channel; throughput unfairness problem mitigation; wireless local area network; Interchannel interference; Multiaccess communication; Receivers; Sensors; Throughput; Wireless LAN; CSMA/CA; Wireless local area networks; co-channel interference; contention window; fairness; throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer and Information Technology (ICCIT), 2013 16th International Conference on

Conference_Location

Khulna

Type

conf

DOI

10.1109/ICCITechn.2014.6997322

Filename

6997322