NDLI: Evaluation of quality of experience for video streaming over dynamic spectrum access systems

Content Provider	IEEE Xplore Digital Library
Author	Ververidis, C.N. Riihijärvi, J. Mähönen, P.
Copyright Year	2010
Description	Author affiliation: Institute for Networked Systems, RWTH Aachen University, Kackertstrasse 9, D-52072 Aachen, Germany (Ververidis, C.N.; Riihijärvi, J.; Mähönen, P.)
Abstract	In this paper we study the problem of quantifying the value of spectrum opportunities to secondary users in Dynamic Spectrum Access (DSA) systems. We especially focus on estimating the impact of key channel parameters, namely the activity patterns of the primary users on the expected quality of experience for secondary users accessing video streams over a DSA system. In our study we consider three basic types of video representing typical video content categorized according to scene change rate ranging from low-activity newscast to high-activity sports video. Through extensive simulations we show that given some information on the expected level of activity in the video, the duty cycle of the primary user alone can yield good predictors for the expected quality of experience of secondary users. Knowledge of the precise distributions of the primary user ON and OFF periods can be used to further enhance the precision of the prediction, but at least for exponential and log-normal channel access patterns the differences are rather small. Finally, we study the problem of determining the channel statistics that are needed to apply the predictor in an optimization setting. Our simulations show that high accuracy can be achieved in matter of minutes of estimation time, which is more than enough for practical deployments in typical urban environments.
Starting Page	1
Ending Page	8
File Size	716470
Page Count	8
File Format	PDF
ISBN	9781424472642
e-ISBN	9781424472659
e-ISBN	9781424472635
DOI	10.1109/WOWMOM.2010.5534892
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	Measurement Availability PSNR IEEE 802.11 Standards Receivers Streaming media Multimedia communication
Content Type	Text
Resource Type	Article

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