Scalable and Distributed GPS free positioning for Sensor Networks Rajagopal Iyengear and Biplab Sikdar IEEE International Conference on Communications (ICC 2003) Bao-Hua Yang
Outline Introduction Scalable GPS free positioning Simulation Conclusion
Introduction Sensor network is characterized Large scale Power constraint In the majority of the existing papers, the knowledge of a sensor node's position is assumed with the aids of GPS receiver The cost of GPS is high
Introduction --- Overview Local Coordinate System Global Coordinate System
Scalable GPS free positioning --- Local Coordinate System
Scalable GPS free positioning --- Local Coordinate System Node1 broadcast a message with its NodeID to become master Node2,3,4,5,6,8,9 broadcast a message with (NodeID, MasterID to compute the relative distance from each other. Node2,3,4,5,6,8,9 send the estimate to its master
Scalable GPS free positioning --- Local Coordinate System
Scalable GPS free positioning --- Local Coordinate System
Scalable GPS free positioning --- Local Coordinate System border
Scalable GPS free positioning --- Local Coordinate System
x (d 19,0)
Scalable GPS free positioning --- Local Coordinate System x (d 19,0)
Scalable GPS free positioning --- Local Coordinate System x y (d 19,0) d 15 d 59 d 19 (d 19,0)
Scalable GPS free positioning --- Local Coordinate System x y (d 19,0) For any other nodes j, If, else
Scalable GPS free positioning --- Local Coordinate System x y (d 19,0) Node x y 1
Scalable GPS free positioning --- Global Coordinate System The master with the higher ID change to the system of the master with lower ID
Scalable GPS free positioning --- Global Coordinate System The distance between i and k is
Scalable GPS free positioning --- Global Coordinate System
Simulation Sensing field: a rectangular region of length L units and breadth B units Sensor node are distributed uniformly with density
Simulation
Conclusion This paper present a distributed and scalable GPS free positioning mechanism
Scalable GPS free positioning --- Global Coordinate System
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