NDLI: The marginal utility of cooperation in sensor networks

Content Provider	IEEE Xplore Digital Library
Author	Yu-Ching Tong Pottie, G.
Copyright Year	2008
Description	Author affiliation: Dept. of Electr. Eng., Univ. of California, Los Angeles, CA (Yu-Ching Tong; Pottie, G.)
Abstract	We present arguments that a small number of sensors within the network provide most of the utility. That is, cooperation of more than a small number of nodes has little benefit. We present two scenarios. In the first scenario, all sensors provide identical utility, and their utilities are aggregated sequentially. The second scenario is sensor fusion with signal strength decreasing with distance. In that scenario the source is at the origin and the sensors are distributed, either uniformly or according to a planar standard normal distribution. We also vary the total number of sensors distributed in both scenarios to observe the utility/density trade off. Localization using the Fisher information as the utility metric is used to demonstrate that few sensors are sufficient to derive most of the utility out of the sensor network. Simulation results back up an order statistics analysis of the behavior. The implication is that while co-operation is useful for some objectives such as combating fading and uncertainty of individual sensors, it is inefficient as a mean to increase the utility of a sensor network if the best sensorpsilas utility is significantly short of the desired utility.
Starting Page	256
Ending Page	262
File Size	341350
Page Count	7
File Format	PDF
ISBN	9781424426706
DOI	10.1109/ITA.2008.4601058
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-01-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading Uncertainty Position measurement Gaussian distribution Probability density function Distance measurement Entropy
Content Type	Text
Resource Type	Article

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