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Scalable and Distributed GPS free positioning for Sensor Networks Rajagopal Iyengear and Biplab Sikdar IEEE International Conference on Communications.

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Presentation on theme: "Scalable and Distributed GPS free positioning for Sensor Networks Rajagopal Iyengear and Biplab Sikdar IEEE International Conference on Communications."— Presentation transcript:

1 Scalable and Distributed GPS free positioning for Sensor Networks Rajagopal Iyengear and Biplab Sikdar IEEE International Conference on Communications (ICC 2003) Bao-Hua Yang

2 Outline Introduction Scalable GPS free positioning Simulation Conclusion

3 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

4 Introduction --- Overview Local Coordinate System Global Coordinate System

5 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

6 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

7 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

8 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

9 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

10 Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 8 9

11 1 2 3 4 5 6 8 9 x (d 19,0)

12 Scalable GPS free positioning --- Local Coordinate System 1 2 3 4 5 6 8 9 x (d 19,0)

13 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)

14 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

15 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

16 Scalable GPS free positioning --- Global Coordinate System The master with the higher ID change to the system of the master with lower ID

17 Scalable GPS free positioning --- Global Coordinate System The distance between i and k is

18 Scalable GPS free positioning --- Global Coordinate System

19

20

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22 Simulation Sensing field: a rectangular region of length L units and breadth B units Sensor node are distributed uniformly with density

23 Simulation

24

25

26 Conclusion This paper present a distributed and scalable GPS free positioning mechanism

27 Scalable GPS free positioning --- Global Coordinate System

28

29 [2001]

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