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Please use this identifier to cite or link to this item: http://hdl.handle.net/1813/5650
Title: Distributed Constraint-based Location Discovery in Ad hoc Networks
Authors: Guha, Saikat
Sirer, Emin Gun
Keywords: computer science
technical report
Issue Date: 7-Jun-2004
Publisher: Cornell University
Citation: http://techreports.library.cornell.edu:8081/Dienst/UI/1.0/Display/cul.cis/TR2004-1939
Abstract: Location discovery is a fundamental building block for many mobile applications. Yet dedicated infrastructure for determining node locations is expensive, energy consuming, and simply unavailable under certain development scenarios. This paper presents an accurate,cheap and scalable protocol for location discovery. Called Zoom, this protocol operates by setting up and solving a system of geographic constraints based on connectivity information from the underlying communication network. Zoom achieves high accuracy by aggressively extracting constraints from the link layer, by propagating this information across multiple network hops and by explicitly tracking the set of possible locations for any given node instead of a single position estimate. Physical experiments with motes show that a large number(98%)of the nodes in a network can determine their positions based on a small number(30%)of landmark nodes with high accuracy(median error less than 30% of transmission range).
URI: http://hdl.handle.net/1813/5650
Appears in Collections:Computing and Information Science Technical Reports

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