A dynamic utility adaptation framework for efficient multimedia service support in CDMA wireless networks

Papavassiliou, S; Kastrinogiannis, T

dc.contributor.author	Papavassiliou, S	en
dc.contributor.author	Kastrinogiannis, T	en
dc.date.accessioned	2014-03-01T01:59:35Z
dc.date.available	2014-03-01T01:59:35Z
dc.date.issued	2010	en
dc.identifier.issn	16871472	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/28996
dc.subject.other	Adaptation framework	en
dc.subject.other	CDMA wireless networks	en
dc.subject.other	Channel aware	en
dc.subject.other	Data services	en
dc.subject.other	Delay tolerant	en
dc.subject.other	Dynamic adaptations	en
dc.subject.other	Network utility maximization	en
dc.subject.other	Opportunistic scheduling	en
dc.subject.other	Optimal power	en
dc.subject.other	Optimization formulations	en
dc.subject.other	Performance improvements	en
dc.subject.other	Rate allocation	en
dc.subject.other	Real time service	en
dc.subject.other	Real-time data	en
dc.subject.other	Realtime multimedia	en
dc.subject.other	Service performance	en
dc.subject.other	Simulation and analysis	en
dc.subject.other	System throughput	en
dc.subject.other	Utility functions	en
dc.subject.other	Utility-based	en
dc.subject.other	Wireless environment	en
dc.subject.other	Information services	en
dc.subject.other	Multimedia services	en
dc.subject.other	Multimedia systems	en
dc.subject.other	Optimization	en
dc.subject.other	Real time systems	en
dc.subject.other	Throughput	en
dc.subject.other	Wireless networks	en
dc.subject.other	Code division multiple access	en
dc.title	A dynamic utility adaptation framework for efficient multimedia service support in CDMA wireless networks	en
heal.type	journalArticle	en
heal.identifier.primary	10.1155/2010/375410	en
heal.identifier.secondary	http://dx.doi.org/10.1155/2010/375410	en
heal.identifier.secondary	375410	en
heal.publicationDate	2010	en
heal.abstract	In this paper the problem of channel-aware opportunistic resource allocation for the downlink in CDMA wireless networks supporting simultaneously real-time multimedia and non-real-time data services is addressed. In order to treat different types of services with diverse QoS prerequisites through common optimization formulation a utility-based power and rate allocation framework is adopted. Emphasis is placed on real-time services' strict short-term QoS prerequisites, the fulfillment of which requires a significantly different treatment than the use of static utility functions, traditionally used to address long-term QoS or fairness prerequisites of delay-tolerant data services. To that end, we introduce a novel framework that enables the dynamic adaptation of real-time multimedia users' utilities as the system evolves, with respect to the corresponding short-term throughput service performance variations. The corresponding non-convex network utility maximization (NUM) problem is then formulated and solved, to obtain optimal power and rate allocation. Via simulation and analysis it is demonstrated that significant performance improvements are achieved in terms of real-time user's short-term throughput requirement satisfaction, without any considerable loss in total system throughput. Finally, essential tradeoffs between fulfilling real-time services' short-term QoS prerequisites and maximizing system performance, under an opportunistic scheduling wireless environment, are revealed and quantified. Copyright © 2010 Timotheos Kastrinogiannis and Symeon Papavassiliou.	en
heal.journalName	Eurasip Journal on Wireless Communications and Networking	en
dc.identifier.doi	10.1155/2010/375410	en
dc.identifier.volume	2010	en