Perspectives on quality of experience for video streaming over WiMAX

Authors:
Arun Vishwanath;Partha Dutta;Malolan Chetlu;Parul Gupta;Shivkumar Kalyanaraman;Amitabha Ghosh
Affiliations:
University of New South Wales, Sydney, Australia;IBM Research, India;IBM Research, India;IBM Research, India;IBM Research, India and Rensselaer Polytechnic Institute, Troy, USA;University of Southern California, Los Angeles, USA
Venue:
ACM SIGMOBILE Mobile Computing and Communications Review
Year:
2010

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Abstract

The advent of broadband wireless networks, such as WiMAX, is paving the way for the widespread deployment of high-bandwidth video streaming services for mobile users. To provide acceptable end-to-end performance in such a network, it is important to monitor the Quality of Experience (QoE) of the user, since the inherent variability in the wireless channel can undermine the video quality significantly. In this context, this paper undertakes a simulation study to evaluate the user's QoE (using PSNR as the representative metric) when video is streamed from a source to a Mobile Station (MS) via a WiMAX Base Station (BS). The WiMAX Forum's ns-2 simulator is used to carry out all the simulations. In particular, we explore the impact of the following parameters, namely, (1) the reserved rate at the BS for the video stream, (2) the Modulation and Coding Scheme employed, (3) the distance between BS and MS, and (4) the tolerable end-to-end delay, on the QoE. Our results point to various trade-offs that exist among these parameters, which can be effectively used to manage the user's viewing experience under varying channel conditions and resource constraints.