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Scalable and Distributed GPS free positioning for Sensor Networks Rajagopal Iyengear and Biplab Sikdar IEEE International Conference on Communications (ICC 2003) Bao-Hua Yang
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Outline Introduction Scalable GPS free positioning Simulation Conclusion
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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
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Introduction --- Overview Local Coordinate System Global Coordinate System
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Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23
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Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 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
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Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23
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Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23
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Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 20 21 22 23 border
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Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 8 9
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1 2 3 4 5 6 8 9 x (d 19,0)
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Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 8 9 x (d 19,0)
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Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 8 9 x y (d 19,0) 1 5 9 d 15 d 59 d 19 (d 19,0)
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Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 8 9 x y (d 19,0) For any other nodes j, If, else
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Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 8 9 x y (d 19,0) Node2 2 5 9 x y 1
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Scalable GPS free positioning --- Global Coordinate System The master with the higher ID change to the system of the master with lower ID
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Scalable GPS free positioning --- Global Coordinate System The distance between i and k is
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Scalable GPS free positioning --- Global Coordinate System
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Simulation Sensing field: a rectangular region of length L units and breadth B units Sensor node are distributed uniformly with density
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Simulation
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Conclusion This paper present a distributed and scalable GPS free positioning mechanism
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Scalable GPS free positioning --- Global Coordinate System
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[2001]
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