Abstract
While there have been considerable advances in the modelling of 802.11’s MAC layer in recent years, 802.11 with finite buffer space is considered difficult to analyse. In this paper, we study the impact of finite buffers’ effect on the 802.11 performance, in view of the requirements of interactive applications sensitive to delay and packet loss. Using both state-of-the art and simplified queueing models, we identify a surprising result. Specifically, we find that increased buffering throughout an 802.11 network will not only incur delay, but may actually increase the packet loss experienced by stations. By means of numerical analysis and simulations we show that this non-monotonic behaviour arises because of the contention-based nature of the medium access protocol, whose performance is closely related to the traffic load and the buffer size. Finally, we discuss on protocol and buffer tuning towards eliminating such undesirable effect.
The research leading to these results was partially funded by the European Community’s 7\(^\textrm{th}\) Framework Programme (FP7-ICT-2009-5) under grant no. 257263 (FLAVIA project) and Science Foundation Ireland under grant no. 07/SK/I1216a and 08/SRC/I1403.
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References
Asmussen, S.: Applied Probability and Queues, 2nd edn. Springer (2003)
Bertsekas, D.P., Gallager, R.G.: Data networks, vol. 2. Prentice-Hall (1987)
Bianchi, G.: Performance analysis of IEEE 802.11 distributed coordination function. IEEE Journal on Selected Areas in Communications 18(3), 535–547 (2000)
Carrig, B., Denieffe, D., Murphy, J.: Supporting first person shooter games in wireless local area networks. In: Proc. IEEE PIMRC, pp. 1–6 (September 2007)
Claypool, M., Claypool, K.: Latency and player actions in online games. Commun. ACM 49 (2006)
Duffy, K., Ganesh, A.J.: Modeling the impact of buffering on 802.11. IEEE Communications Letters 11(2) (February 2007)
Huang, K., Duffy, K.R., Malone, D.: On the validity of IEEE 802.11 MAC modeling hypotheses. IEEE/ACM Transactions on Networking 18(6), 1935–1948 (2010)
Little, J., Graves, S.: Little’s law. In: Building Intuition. International Series in Operations Research & Management Science, vol. 115, pp. 81–100. Springer US (2008)
Liu, R.P., Sutton, G., Collings, I.B.: A new queueing model for QoS analysis of IEEE 802.11 DCF with finite buffer and load. IEEE Transactions on Wireless Communications 9(8), 2664–2675 (2010)
Malone, D., Duffy, K., Leith, D.: Modeling the 802.11 distributed coordination function in nonsaturated heterogeneous conditions. IEEE/ACM Transactions on Networking 15(1), 159–172 (2007)
Patras, P., Banchs, A., Serrano, P., Azcorra, A.: A Control-Theoretic Approach to Distributed Optimal Configuration of 802.11 WLANs. IEEE Transactions on Mobile Computing 10(6), 897–910 (2011)
Zhai, H., Kwon, Y., Fang, Y.: Performance analysis of IEEE 802.11 MAC protocols in wireless LANs. Wireless Communications and Mobile Computing 4(8), 917–931 (2004)
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Malone, D., Qi, H., Botvich, D., Patras, P. (2013). 802.11 Buffers: When Bigger Is Not Better?. In: Bianchi, G., Lyakhov, A., Khorov, E. (eds) Wireless Access Flexibility. WiFlex 2013. Lecture Notes in Computer Science, vol 8072. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-39805-6_4
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DOI: https://doi.org/10.1007/978-3-642-39805-6_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-39804-9
Online ISBN: 978-3-642-39805-6
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