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Proceedings Paper

Video delivery over wireless channel with dynamic QoS control
Author(s): Sherry Wang; Harold Zheng; John A. Copeland
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Paper Abstract

The combination of bit-rate variability of compressed video traffic and inferior quality of a wireless fading channel causes low bandwidth efficiency, high data error rate, and long delay to wireless multimedia applications. In this paper, we analyze the drawbacks of conventional SR-ARQ for time- constrained traffic transmission, such as video. We also show the necessity of enhancing the existing data link protocols. Consequently, a new QoS aware SR-ARQ (QSR-ARQ) scheme is proposed. QSR-ARQ utilizes the layer property of MPEG video frames, as well as varied QoS requirements of different data sections to improve the protocol performance. A time spreading technique that based on clients' buffering capacity is also used in the study. This technique not only reduces the bit- rate fluctuation of video traffic but also alleviates the impact of burst link errors on MPEG video. Comprehensive computer simulations were used to compare the performance of the proposed QSR-ARQ with a conventional SR-ARQ using original video traffic and the pre-processed ones. The results proved the applicability and the effectiveness of the QSR-ARQ and the time spreading technique for transmitting MPEG videos with QoS guarantees in a wireless mobile environment. QSR-ARQ can also be applied to the component-based video compression applications.

Paper Details

Date Published: 19 April 2000
PDF: 9 pages
Proc. SPIE 3974, Image and Video Communications and Processing 2000, (19 April 2000); doi: 10.1117/12.382962
Show Author Affiliations
Sherry Wang, Georgia Institute of Technology (United States)
Harold Zheng, Georgia Institute of Technology (United States)
John A. Copeland, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 3974:
Image and Video Communications and Processing 2000
Bhaskaran Vasudev; T. Russell Hsing; Andrew G. Tescher; Robert L. Stevenson, Editor(s)

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