Abstract Adaptive performance management for universal mobile telecommunications system net.pdf

Adaptive performance management for universal mobile telecommunications system networks Christoph Lindemann*, Marco Lohmann, Axel Th€ummler Department of Computer Science, University of Dortmund, August-Schmidt-Strasse 12, 44227 Dortmund, Germany Received 6 September 2001; accepted 28 September 2001 Responsible Editor: I.F. Akyildiz Abstract In this paper, we introduce a framework for the adaptive control of universal mobile telecommunications system (UMTS) networks in order to improve bandwidth utilization of the radio channels. The key contribution of the paper constitutes the introduction of a performance management information base for dynamically adjusting the packet scheduler and admission controller. Thus, the adaptive control framework closes the loop between network operation and network control. Furthermore, the adaptive control framework can effectively deal with the different time scales of packet scheduling and admission control. Moreover, we present a traffic model for non-real-time UMTS traffic based on measured trace data. The analysis and scaling process of the measured trace data with respect to different UMTS bandwidth classes constitutes the basic concept of this traffic characterization. Using this traffic model and simulation on the IP level, the gain of employing the adaptive control framework is illustrated by performance curves for various quality of service measures.
2002 Elsevier Science B.V. All rights reserved. Keywords: Third generation wireless systems; Performance management; Quality of service provisioning; Discrete-event simulation 1. Introduction Third generation (3G) mobile communication systems like the universal mobile telecommunica- tions system (UMTS) are characterized by a mi- gration from voice-only to integrated services networks with data rates up to 2 Mbps. Thus, applications such as e-mail, Web browsing, and corporate local network access, as well as video conferencing, e-commerce, and multimedia can be supported over