A Dynamic Utility Adaptation Framework for Efficient Multimedia Service Support in CDMA Wireless Networks

Kastrinogiannis, T; Papavassiliou, S

dc.contributor.author	Kastrinogiannis, T	en
dc.contributor.author	Papavassiliou, S	en
dc.date.accessioned	2014-03-01T01:32:26Z
dc.date.available	2014-03-01T01:32:26Z
dc.date.issued	2010	en
dc.identifier.issn	1687-1499	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20133
dc.subject	Multimedia Services	en
dc.subject	Wireless Network	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Telecommunications	en
dc.subject.other	RESOURCE-ALLOCATION	en
dc.subject.other	CONTROL ALGORITHMS	en
dc.subject.other	SYSTEMS	en
dc.subject.other	DOWNLINK	en
dc.subject.other	OPTIMIZATION	en
dc.subject.other	FAIRNESS	en
dc.subject.other	CONSTRAINTS	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.language	English	en
heal.publicationDate	2010	en
heal.abstract	In this paper, the problem of channel-aware opportunistic resource allocation for the downlink in code division multiple access 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 more 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 generic 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 nonconvex network utility maximization (NUM) problem is then formulated and solved to obtain optimal downlink 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 the total system throughput. Finally, an essential tradeoff between efficiently fulfilling real-time services' short-term QoS prerequisites and maximizing overall system performance, under an opportunistic scheduling wireless environment, is revealed and quantified.	en
heal.publisher	HINDAWI PUBLISHING CORPORATION	en
heal.journalName	EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING	en
dc.identifier.doi	10.1155/2010/375410	en
dc.identifier.isi	ISI:000285613500001	en