NDLI: Mixed Traffic HSDPA scheduling - Impact on VoIP Capacity

Content Provider	IEEE Xplore Digital Library
Author	Ericson, M. Wanstedt, S.
Copyright Year	2007
Description	Author affiliation: Ericsson Res., Lulea (Ericson, M.; Wanstedt, S.)
Abstract	IMS multimedia telephony (MMTel) for cellular systems is currently being standardized in 3GPP. MMTel comprises a number of media components such as voice over IP (VoIP), real-time video, text messaging and file sharing. In this paper down-link scheduling performance of MMTel services for various scheduling algorithms is investigated in an HSDPA system. The studied service mixes include VoIP and file download (FTP), as well as VoIP and real-time video. The investigation of the schedulers is done over a wide range of traffic mix ratios, in order to give a full understanding of the performance. This paper shows that it is beneficial to have separate schedulers for each media flow. For an MMTel scenario with VoIP and file downloading, the best performance is achieved when using a delay scheduler for VoIP and a proportional fair (PF) scheduler for FTP. An extra priority weight for VoIP over FTP (or v.v.) makes it possible to control the wanted total service mix. With simultaneous VoIP and real-time video the best performance is achieved when both services utilize a delay scheduler, this since the VoIP and video flows shall be synchronized. However, the scheduler for the video flow requires different parameter settings, compared to the VoIP flow, in order to give the best performance.
Starting Page	1282
Ending Page	1286
File Size	134185
Page Count	5
File Format	PDF
ISBN	1424402662
ISSN	15502252
DOI	10.1109/VETECS.2007.269
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-04-22
Publisher Place	Ireland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiaccess communication Delay Video sharing Bit rate Internet telephony Quality of service Traffic control Speech Decoding Multimedia systems
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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