tailieunhanh - Báo cáo hóa học: " Research Article Power-Constrained Fuzzy Logic Control of Video Streaming over a Wireless Interconnect"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Power-Constrained Fuzzy Logic Control of Video Streaming over a Wireless Interconnect | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 560749 14 pages doi 2008 560749 Research Article Power-Constrained Fuzzy Logic Control of Video Streaming over a Wireless Interconnect Rouzbeh Razavi Martin Fleury and Mohammed Ghanbari Department of Computing and Electronic Systems University of Essex Colchester CO4 3SQ UK Correspondence should be addressed to Martin Fleury fleum@ Received 29 September 2007 Accepted 6 May 2008 Recommended by David Bull Wireless communication of video with Bluetooth as an example represents a compromise between channel conditions display and decode deadlines and energy constraints. This paper proposes fuzzy logic control FLC of automatic repeat request ARQ as a way of reconciling these factors with a 40 saving in power in the worst channel conditions from economizing on transmissions when channel errors occur. Whatever the channel conditions are FLC is shown to outperform the default Bluetooth scheme and an alternative Bluetooth-adaptive ARQ scheme in terms of reduced packet loss and delay as well as improved video quality. Copyright 2008 Rouzbeh Razavi et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Preservation of battery power is an essential feature of mobile devices to reduce the frequency of recharges. Though Bluetooth IEEE 1 devices have hold park and sniff low activity modes and the transceiver is designed to minimize power 2 it is still important that an application reduces the total data transmitted as there is approximately a linear relationship 3 4 between bit rate and energy consumption. A number of authors for example 4-8 have investigated ways to manage power in a wireless network when streaming video. Although the enhanced data rate EDR of Bluetooth .