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Range-Based and Range-Free Localization Schemes for Sensor Networks - page 2 / 37

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Localization

Critical service

A sensor reading consists of <time, location, measurement>

E.g., target tracking, disaster recovery, fire detection, patient location in a smart hospital, …

Needed for geographic routing

Too expensive for an individual sensor to have a GPS (Global Positioning System)

Reference nodes (called anchor or beacon nodes) + sensor nodes

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