ChinaCom2008-Wireless Communications and Networking Symposium

Research Article

Adaptive Buffer Sizing for TCP Flows in 802.11e WLANs

  • @INPROCEEDINGS{10.1109/CHINACOM.2008.4684957,
        author={Tianji Li and Douglas Leith},
        title={Adaptive Buffer Sizing for TCP Flows in 802.11e WLANs},
        proceedings={ChinaCom2008-Wireless Communications and Networking Symposium},
        keywords={802.11 Wireless LANs (WLANs) Medium Access Control (MAC) Buffer sizing/provision},
  • Tianji Li
    Douglas Leith
    Year: 2008
    Adaptive Buffer Sizing for TCP Flows in 802.11e WLANs
    DOI: 10.1109/CHINACOM.2008.4684957
Tianji Li1,*, Douglas Leith1,*
  • 1: Hamilton Institute, National University of Ireland at Maynooth, Ireland
*Contact email:,


We consider the provision of Access Point buffers in WLANs. We first demonstrate that the default use of static buffers in WLANs leads to either undesirable channel under-utilisation or unnecessary high delays, which motivates the use of dynamic buffer sizing. Although adaptive algorithms have been proposed for wired Internet, a number of fundamental new issues arise in WLANs which necessitates new algorithms to be designed. These new issues include the fact that channel bandwidth is time-varying, the mean service rate is dependent on the level of channel contention, and packet inter-service times vary stochastically due to the random nature of CSMA/CA operation. We propose an adaptive sizing algorithms which is demonstrated to be able to maintain high throughput efficiency whilst achieving low delay.