NDLI: OptiMOS: Optimal MOS-based scheduling of downlink voice flows in point-to-multipoint access networks

Content Provider	IEEE Xplore Digital Library
Author	Andreozzi, M.M. Stea, G. Sabella, D.
Copyright Year	2010
Description	Author affiliation: Telecom Italia S.p.A. Via G. Reiss Romoli 274, 10148 Turin - Italy (Sabella, D.) \|\| Dipartimento di Ingegneria dell'Informazione, University of Pisa, Via Diotisalvi 2, 56122 Pisa - Italy (Andreozzi, M.M.; Stea, G.)
Abstract	We introduce OptiMOS, a method for selecting deadlines for the scheduling of downlink voice flows in a centralized-scheduling point-to-multipoint network. These include cellular networks such as LTE, UMTS HSDPA, or WiMAX, and WLANs with centralized control. OptiMOS selects the deadline of each packet so as to maximize the expected Mean Opinion Score (MOS) for the talkspurt it belongs to. It requires that absolute time is both included in RTP timestamps at the source and checked for scheduling decisions, in a cross-layer approach. OptiMOS can be employed in conjunction with any deadline-based scheduling algorithm, and does not require a specific playout buffering scheme at the receiver. Simulations of an LTE system show a performance improvement in terms of MOS for the VoIP flows, good tolerance to relatively large synchronization errors and qualitatively similar results with different playout buffers.
Starting Page	1
Ending Page	6
File Size	433895
Page Count	6
File Format	PDF
ISBN	9781424472642
e-ISBN	9781424472659
e-ISBN	9781424472635
DOI	10.1109/WOWMOM.2010.5534961
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-14
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Packet Scheduling Codecs Voice over IP Mean Opinion Score Receivers Speech Downlink Physical layer Wireless Networks Synchronization Delay
Content Type	Text
Resource Type	Article

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