1. An Energy-Efficient Communication Scheme in Wireless Cable Sensor Networks Xiao Chen Neil C. Rowe epartment of Computer Science Department of Computer Science Texas State University U. S. Naval Postgraduate School IEEE ICC 2011

2. OUTLINE Introduction Problem Formulation CMT ALGORITHM Simulation Conclusion

3. Introduction traditional sensors used point sensors which have a disc-shaped sensing region

4. Introduction a new sensor has become available for detecting seismic signals ◦Borders ◦Roads energy-efficient communication is very important

5. Introduction traditional point sensor cable sensor

6. Problem Formulation 2-dimensional convex terrain coverage degree K ◦K-coverage ◦K-connectivity

7. Problem Formulation

8. L D

9. CMT ALGORITHM Cable ◦ACTIVE ◦SNOOPY ◦SLEEP SLEEP ACTIVE SNOOPY INELIGIBLE ELIGIBLE Timer INELIGIBLE ELIGIBLE

10. CMT ALGORITHM A convex terrain is K-covered by a set of cables ◦terrain A intersection points between cables or between cables and A’s boundary ◦all intersection points between any cables are at least K-covered ◦all intersection points between any cable and A’s boundary are at least K-covered

11. CMT ALGORITHM 2-covered

12. CMT ALGORITHM

13. Simulation simulator ◦ selfwritten terrains ◦30×30 and 40×40 two kinds of cables ◦D5L10 (sensing range 5 and length 10) ◦D5L20 (sensing range 5 and length 20)

14. Simulation D5L10D5L20

15. Simulation D5L10D5L20

16. Simulation D5L10D5L20 R = 22.36 R = 30

17. Conclusion proposed a distributed algorithm called CMT to reduce communication energy consumption in a new type of sensor network In the future,we will discuss point coverage and barrier coverage problems using cable sensor