Sensor Networks Katia Obraczka Winter 2005 Localization: GPS

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Sensor Networks Katia Obraczka Winter 2005 Localization: GPS CMPE 259 Sensor Networks Katia Obraczka Winter 2005 Localization: GPS

Announcements Homework due on 02.14. Final project presentations. Submission: e-mail to katia, cintia, kumarv@soe. Plain text or pdf. Final project presentations. Updated reading list for next class.

Today Gabriel Elkaim’s talk on GPS.

Node Localization

Node Localization For some sensor network applications, exact location is critical. Tracking. Monitoring. For most applications, having location information enhance value of information. Also needed in geographic routing.

How to determine node location? May be trivially available if: Satellite based GPS is feasible and available on all nodes. All nodes are hand-placed and pre-configured with location coordinates. Otherwise it is quite challenging (even with a fraction of known reference/beacon nodes). Typically, one assumes some nodes have position information (e.g., through GPS), but not all.