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Proceedings Paper

Sensor scheduling for lifetime maximization in user-centric sensor networks
Author(s): Chao Yu; Gaurav Sharma
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Paper Abstract

We explore sensor scheduling strategies to maximize the operational lifetime of a user-centric image sensor network. Image sensors are deployed for gathering visual information over a monitored region. Users navigate within this region by specifying a time-varing desired viewpoint and the network responds with the requested visual data. By modeling the user's desired viewpoint in a probabilistic framework, we develop a stochastic formulation of the network lifetime and investigate the camera scheduling strategy that maximizes the expected value of network lifetime. By suitably abstracting the problem, we present a closed-form solution for the simplistic case when the monitored region is divided into two parts. Using asymptotic analysis, we then present a simple camera scheduling strategy for the general case that we conjecture to be optimal. Simulation results demonstrate a clear advantage of the proposed camera scheduling approach over previously considered alternatives.

Paper Details

Date Published: 19 January 2009
PDF: 12 pages
Proc. SPIE 7257, Visual Communications and Image Processing 2009, 72570H (19 January 2009); doi: 10.1117/12.807958
Show Author Affiliations
Chao Yu, Univ. of Rochester (United States)
Gaurav Sharma, Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 7257:
Visual Communications and Image Processing 2009
Majid Rabbani; Robert L. Stevenson, Editor(s)

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