Online Association Policies in IEEE 802.11 WLANs

In this paper, we study the performance of client-Access Point (AP) association policies in IEEE 802.11 based WLANs. In many scenarios, clients have a choice of APs with whom they can associate. We are interested in finding association policies which lead to optimal system performance. More specific...

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Bibliographic Details
Main Authors: Kasbekar, G.S., Kuri, J., Nuggehalli, P.
Format: Conference Proceeding
Language:English
Subjects:
Analytical models
Current measurement
Employment
Lyapunov method
Noise measurement
Protocols
Signal to noise ratio
Stability analysis
System performance
Wireless LAN
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Summary:In this paper, we study the performance of client-Access Point (AP) association policies in IEEE 802.11 based WLANs. In many scenarios, clients have a choice of APs with whom they can associate. We are interested in finding association policies which lead to optimal system performance. More specifically, we study the stability of different association policies as a function of the spatial distribution of arriving clients. We find for each policy the range of client arrival rates for which the system is stable. For small networks, we use Lyapunov function methods to formally establish the stability or instability of certain policies in specific scenarios. The RAT heuristic policy introduced in our prior work is shown to have very good stability properties when compared to several other natural policies. We also validate our analytical results by detailed simulation employing the IEEE 802.11 MAC.
DOI:10.1109/WIOPT.2006.1666467