NDLI: Information-directed routing in ad hoc sensor networks

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Information-directed routing in ad hoc sensor networks

Content Provider	ACM Digital Library
Author	Zhao, Feng Liu, Juan Petrovic, Dragan
Abstract	In a sensor network, data routing is tightly coupled to the needs of a sensing task, and hence the application semantics. This paper introduces the novel idea of information-directed routing, in which routing is formulated as a joint optimization of data transport and information aggregation. The routing objective is to minimize communication cost while maximizing information gain, differing from routing considerations for more general ad hoc networks. The paper uses the concrete problem of locating and tracking possibly moving signal sources as an example of information generation processes, and considers two common information extraction patterns in a sensor network: routing a user query from an arbitrary entry node to the vicinity of signal sources and back, or to a prespecified exit node, maximizing information accumulated along the path. We derive information constraints from realistic signal models, and present several routing algorithms that find near-optimal solutions for the joint optimization problem. Simulation results have demonstrated that information-directed routing is a significant improvement over a previously reported greedy algorithm, as measured by sensing quality such as localization and tracking accuracy and communication quality such as success rate in routing around sensor holes.
Starting Page	88
Ending Page	97
Page Count	10
File Format	PDF
ISBN	1581137648
DOI	10.1145/941350.941363
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2003-09-19
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Target localization Routing Sensor network Ad hoc network Information
Content Type	Text
Resource Type	Article

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