Energy-Efficient Video Transmission Over a Wireless Link

• Published in: IEEE transactions on vehicular technology Vol. 58; no. 3; pp. 1229 - 1244
• Main Authors: Ye Li, Reisslein, M., Chakrabarti, C.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-03-2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Analog circuits; Applied sciences; Bit error rate; Bit rate; Buffers; Circuit properties; Electric, optical and optoelectronic circuits; Electrical engineering. Electrical power engineering; Electrical machines; Electronic circuits; Electronics; Energy conservation; Energy consumption; Energy efficiency; Energy transmission; Exact sciences and technology; Information, signal and communications theory; Minimization; Modulation, demodulation; Multiple access interference; Multiuser systems; Optimization; Power system modeling; Radio frequencies; Radio frequency; radio frequency (RF) front end; Regulation and control; Signal and communications theory; Smoothing methods; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Telecommunications industry; Transmission and modulation (techniques and equipments); Video transmission; wireless video; RF front-end; Energy efficiency; wireless video; Analog circuit; Bit error rate; Wireless telecommunication; Video signal; Information rate; Group of pictures; Modulation; Signal transmission; Minimum energy; radio frequency (RF) front end; Multiple access; Optimal algorithm; Power electronics; Specification; Buffer system; Radiofrequency; Information transmission; Energy savings; Signal interference; Power consumption; Algorithm performance; Idling; Code division multiple access; System simulation; Low-power electronics
• ISSN: 0018-9545; 1939-9359
• DOI: 10.1109/TVT.2008.927720

Energy minimization is an important design goal in wireless video transmission. We examine how the RF energy and the analog circuit energy, which account for a large part of the energy consumption for wireless video transmission, can be controlled with physical-layer parameters (e.g., modulation level, bit rate, bit error rate, and multiple access interference) and link-layer specifications (e.g., the buffer status, idle time, and active time). Building on these insights, we develop three energy-efficient video transmission schemes for the single-user system, i.e., frame-by-frame transmission, group of pictures (GOP)-by-GOP transmission, and client-buffer-related energy-efficient video transmission (CBEVT). Our simulations indicate that energy savings of up to 85% is achievable in the radio frequency (RF) front end using the CBEVT algorithm. We also present an energy-efficient optimal smoothing algorithm for reducing the RF front-end energy consumption and the peak data rate. For CDMA-based multiuser systems, we propose an RF front-end energy model that assumes perfect power control. We find the signal-to-interference-noise ratio (SINR) for the entire system that minimizes the total energy consumption. We propose the multiuser-based energy-efficient video transmission (MBEVT) algorithm, which can achieve energy savings of up to 38% for a six-user CDMA system with an independent 16-MB buffer for every uplink.