Title :
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
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;
Conference_Titel :
Computer and Information Technology (ICCIT), 2013 16th International Conference on
Conference_Location :
Khulna
DOI :
10.1109/ICCITechn.2014.6997322
