DocumentCode :
1431579
Title :
On Optimal Information Capture by Energy-Constrained Mobile Sensors
Author :
He, Shibo ; Chen, Jiming ; Sun, Youxian ; Yau, David K Y ; Yip, Nung Kwan
Author_Institution :
Dept. of Control Sci. & Eng., Zhejiang Univ., Hangzhou, China
Volume :
59
Issue :
5
fYear :
2010
fDate :
6/1/2010 12:00:00 AM
Firstpage :
2472
Lastpage :
2484
Abstract :
A mobile sensor is used to cover a number of points of interest (PoIs), where dynamic events appear and disappear according to the given random processes. The sensor, which is of sensing range r, visits the PoIs in a cyclic schedule and gains information about any event that falls within its range. We consider the temporal dimension of the sensing as given by a utility function, which specifies how much information is gained about an event as a function of the cumulative sensing or observation time. The quality of monitoring (QoM), i.e., the fraction of information captured about all events, depends on the speed of the sensor and has been analyzed in an earlier paper for different utility functions. The prior work, however, does not consider the energy of motion, which is an important constraint for mobile sensor coverage. In this paper, we analyze the expected Information captured Per unit of Energy consumption (IPE) as a function of the event type (in terms of the utility function), the event dynamics, and the speed of the mobile sensor. Our analysis uses a realistic energy model of motion, and it allows the sensor speed to be optimized for information capture. The case of multiple sensors will also be discussed. Extensive simulation results verify and illustrate the analytical results.
Keywords :
mobile radio; power consumption; random processes; wireless sensor networks; Pol; energy constrained mobile sensors; energy consumption; optimal information capture; points of interest; quality of monitoring; random processes; utility function; Energy consumption; mobile sensor coverage; quality of monitoring (QoM); sensor network;
fLanguage :
English
Journal_Title :
Vehicular Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9545
Type :
jour
DOI :
10.1109/TVT.2010.2044592
Filename :
5424045
Link To Document :
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