Buffer Control Techniques for QoS Provisioning in Wireless Networks

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Author(s): Michael M. Markou (University of Cyprus, Cyprus)and Christos G. Panayiotou (University of Cyprus, Cyprus)
Copyright: 2009
Pages: 26
Source title: Handbook of Research on Wireless Multimedia: Quality of Service and Solutions
Source Author(s)/Editor(s): Nicola Cranley (Dublin Institute of Technology, Ireland)and Liam Murphy (University College Dublin, Ireland)
DOI: 10.4018/978-1-59904-820-8.ch006

Keywords: Information Science Reference / Media & Communications / Mobile and Wireless Computing / Multimedia Technology

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Abstract

This chapter introduces the network buffer control techniques as a mean to provide QoS. This problem has been extensively studied in the context of wirelined networks; however, the proliferation of wireless networks and the introduction of multimedia applications has significantly changed the characteristics of the traffic mix that flows on the network. The objective of this chapter is to create a new methodology for automatically adapting the various buffer thresholds such that the network exhibits optimal or near optimal performance even as network conditions change. The behavior of the network (generally a discrete event system—DES) is approximated by that of a stochastic fluid model (SFM); then using infinitesimal perturbation analysis (IPA) we obtain sensitivity estimators of the performance measure(s) of interest with respect to the control parameter. These estimators are easy to compute using data observed from the DES’s sample path. Finally, the computed estimators are used in stochastic approximation algorithms to adjust the thresholds.

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Buffer Control Techniques for QoS Provisioning in Wireless Networks

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