A Delay Optimal Scheduling Policy for Real Time Services in WCDMA Systems

Komnakos, D; Skoutas, DN; Vouyioukas, D; Rouskas, A

dc.contributor.author	Komnakos, D	en
dc.contributor.author	Skoutas, DN	en
dc.contributor.author	Vouyioukas, D	en
dc.contributor.author	Rouskas, A	en
dc.date.accessioned	2014-03-01T02:04:20Z
dc.date.available	2014-03-01T02:04:20Z
dc.date.issued	2011	en
dc.identifier.issn	0929-6212	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29423
dc.subject	Enhanced uplink	en
dc.subject	Scheduling algorithm	en
dc.subject	Real-time services	en
dc.subject	QoS differentiation	en
dc.subject.classification	Telecommunications	en
dc.subject.other	PERFORMANCE	en
dc.title	A Delay Optimal Scheduling Policy for Real Time Services in WCDMA Systems	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Enhanced Uplink operation of WCDMA-UMTS systems utilizes fast Node B scheduling and a short Transmission Time Interval (TTI) of 2 ms. The scheduling decisions are based on Scheduling Information (SI) sent from each User Equipment (UE) to the Node B. The weakness of the existing scheduling framework is that the SI does not include information regarding the delay sensitivity of each traffic flow, as well as the actual delay that the buffered data have experienced, especially for real-time services. In this paper, we propose the inclusion of such information in SI by introducing modifications into the respective 3GPP specifications. Thus, we propose a Delay Aware Channel Prioritization (DACP) criterion optimized for real-time services. Furthermore, we propose a DACP-based packet Scheduler (DACP-S) which is able to dynamically manage the Enhanced Dedicated Channel's (E-DCH) transmissions and offer Quality of Service differentiation. The performance of the proposed scheme is evaluated by means of system level simulations.	en
heal.publisher	SPRINGER	en
heal.journalName	WIRELESS PERSONAL COMMUNICATIONS	en
dc.identifier.isi	ISI:000297354500010	en
dc.identifier.volume	61	en
dc.identifier.issue	2	en
dc.identifier.spage	435	en
dc.identifier.epage	445	en