Access Point Selection for Improving Throughput Fairness in Wireless LANs

We investigate the problem of access point selection in wireless LANs based on the IEEE 802.11 standard, when a station is within the vicinity of more than one access points. According to the proposed approach, the selection is based on the packet transmission delay for each access point that a station can associate to, which is related to the throughput that the station can achieve. Important features of the approach is that it considers the contention-based nature of IEEE 802.11's MAC layer, it can be applied to the 802.11e standard which can support different classes in terms of the minimum contention window, and it can be implemented solely at the wireless stations, which passively monitor the activity of each access point's channel, without requiring modifications to the access points. Experiments show that the proposed approach can achieve significantly higher throughput fairness compared to other approaches, without a significant decrease of the aggregate throughput.

[1]  Satish K. Tripathi,et al.  Link quality based association mechanism in IEEE 802.11 h compliant wireless LANs , 2005 .

[2]  Paramvir Bahl,et al.  Hot-spot congestion relief in public-area wireless networks , 2002, Proceedings Fourth IEEE Workshop on Mobile Computing Systems and Applications.

[3]  Kang G. Shin,et al.  Achieving efficient channel utilization and weighted fairness for data communications in IEEE 802.11 WLAN under the DCF , 2002, IEEE 2002 Tenth IEEE International Workshop on Quality of Service (Cat. No.02EX564).

[4]  Yuji Oie,et al.  Decentralized access point selection architecture for wireless LANs , 2007, 2004 Symposium on Wireless Telecommunications.

[5]  Costas Courcoubetis,et al.  Resource control for the EDCA mechanism in multi-rate IEEE 802.11e networks , 2006, 2006 International Symposium on a World of Wireless, Mobile and Multimedia Networks(WoWMoM'06).

[6]  Pavan Nuggehalli,et al.  Online Association Policies in IEEE 802.11 WLANs , 2006, 2006 4th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks.

[7]  Eitan Altman,et al.  New Insights From a Fixed-Point Analysis of Single Cell IEEE 802.11 WLANs , 2007, IEEE/ACM Transactions on Networking.

[8]  Seung-Jae Han,et al.  Fairness and Load Balancing in Wireless LANs Using Association Control , 2004, IEEE/ACM Transactions on Networking.

[9]  Marco Conti,et al.  Dynamic tuning of the IEEE 802.11 protocol to achieve a theoretical throughput limit , 2000, TNET.

[10]  Donald F. Towsley,et al.  Facilitating access point selection in IEEE 802.11 wireless networks , 2005, IMC '05.

[11]  Konstantina Papagiannaki,et al.  Self Organization of Interfering 802.11 Wireless Access Networks , 2005 .

[12]  A. Girotra,et al.  Performance Analysis of the IEEE 802 . 11 Distributed Coordination Function , 2005 .

[13]  Vasilios A. Siris,et al.  Optimal CWmin selection for achieving proportional fairness in multi-rate 802.11e WLANs: test-bed implementation and evaluation , 2006, WINTECH.