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Unformatted text preview: 642 IEEE TRANSACTIONS ON MULTIMEDIA, VOL. 9, NO. 3, APRIL 2007 Scene-Change Aware Dynamic Bandwidth Allocation for Real-Time VBR Video Transmission Over IEEE 802.15.3 Wireless Home Networks Yi-Hsien Tseng, Eric Hsiao-Kuang Wu , Member, IEEE , and Gen-Huey Chen Abstract IEEE 802.15.3, an emerging wireless technology, was designed to provide high-quality multimedia services at home. Dy- namic bandwidth allocation for a multimedia connection should be considered in order to achieve higher channel utilization, less buffer and less delay, especially for variable bit rate (VBR) multi- media connections. For real-time VBR videos, the bandwidth re- quirement should be predicted adaptively for effective channel- time requests. Previously, the adaptive least-mean square (LMS) algorithm with fixed step size was applied to predict channel time requirements due to its simplicity and relatively good performance. However, the performance might degrade when scene changes oc- curred. In this paper, we modify the variable step-size LMS algo- rithm and apply it as our predictor (VSSNLMS) so that the predic- tion errors on scene changes can be effectively reduced. Using the prediction results of VSSNLMS, we propose a dynamic bandwidth- allocation scheme that is scene-change aware and can guarantee the delay bound of real-time VBR videos. Simulation results show that the VSSNLMS predictor is superior to previous LMS-type predictors in performance, and the proposed scheme has better performance in channel utilization, buffer usage, and packet loss. Index Terms Dynamic bandwidth allocation, IEEE 802.15.3, NLMS, QoS. I. INTRODUCTION I NNOVATIVE mobile and wireless entertainment markets are witnessing unprecedented growth fueled by the recent proliferation of consumer electronic devices and wireless technology revolutions. Because of ease of installation or relocation, wireless home networks are particularly attractive to ensure required wire-like performance for many indoor multimedia applications, such as smart phones, media servers, set-top boxes, flat-panel screens, and digital camcorders. Re- cent progress in wireless technologies has made it possible for people to enjoy high-quality multimedia services at home [1]. These high-quality multimedia services may include an Manuscript received April 6, 2006; revised August 17, 2006. This work was supported by Chungshan Institute of Science and Technology under the Wide Band Mobile Communication System Integration Technology Project 95-EC-17-A-03-R7-02C5 and by Media Tek Inc. under the Mobile Applications for UWB and CR Technologies Project. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Anna Hac....
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This note was uploaded on 11/30/2011 for the course CIS 6930 taught by Professor Staff during the Fall '08 term at University of Florida.

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