1. Source :2009 Fifth International Joint Conference on INC, IMS and IDC Authors ： Min-Woo Park, Jin-Young Choi, Young-Ju Han, and Tai-Myoung Chung Reporter : Cheng-Yao Yeh ( 葉政耀 )

2. Outline Introduction Scheme Performance evaluation Conclusion

3. Introduction

6. Scheme Level Assignment sensor nodes are allocated to cluster by distance from the BS. Select CH Calculates the weight value for selection of CH.

7. Scheme Data transmission Step1: Level Assignment Step2: Select CH Step3: Sensor transmits data to CH Step4: CH transmits data to next CH Step5: CH transmits data to BS Sensor node CH BS

8. Performance evaluation

10. Conclusion EECCRS to increase lifetime of sensor network. EECCRS achieves balance of energy dissipation among the cluster. A further direction of this study will distribute energy dissipation that is occurred when the cluster head transmits data to the BS.