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2009
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Distributed Quality-Lifetime Maximization in Wireless Video Sensor Networks

9 years 6 months ago
Distributed Quality-Lifetime Maximization in Wireless Video Sensor Networks
—Owing to the availability of low-cost and low-power CMOS cameras, Wireless Video Sensor Networks (WVSN) has recently become a reality. However video encoding is still a costly process for energy and capacity constrained sensor nodes and this urges the vitality of the control over the network lifetime. In this paper we propose a distributed quality-lifetime control algorithm where quality is simply measured by the visual signal quality. In order to formulate the quality-lifetime problem, we consider the Power-Rate-Distortion (P-R-D) model of the video encoder together with the rate control, medium access and routing functions of the underlying communication protocol and formulate it as a Generalized Network Utility Maximization (GNUM) problem. Then we construct the distributed solution based on duality and proximal point methods with necessary convergence analysis. Simulation results support that optimal quality-lifetime control is possible through the distributed algorithm, where th...
Eren Gürses, Yuan Lin, Raouf Boutaba
Added 21 May 2010
Updated 21 May 2010
Type Conference
Year 2009
Where ICC
Authors Eren Gürses, Yuan Lin, Raouf Boutaba
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