Authors : Saravanan Balasubramanian, Demet Aksoy Published : Computer Networks

1. Adaptive energy-efficient registration and online scheduling for asymmetric wireless sensor networks Authors : Saravanan Balasubramanian, Demet Aksoy Published : Computer Networks Speaker : Wen-Chuan Huang

2. Outline • Introduction • AEROS • Message format • Channel division • Control message • Experiments • Conclusions

3. Introduction

4. Goal • propose a novel and adaptive sensor registration and scheduling protocol • enable adaptive routing paths towards the data collection points • minimize the data transmissions such that each observation is transmitted only once per node • using collision-free scheduling that is enabled even while the network is organizing • The chances of data aggregation during routing is maximized

5. Message format 感測值 感測數量 事件範圍 持續時間 屬性 (temperature, 4, 3, 1, 3, 2, 5, 2, 2) (temperature, 3, 5, 1, 2, 2, 4, 2, 3) (temperature, 3.375, 8, 1, 2, 2, 5, 2, 3) (4*3+3*5)/(3+5) 3+5

6. Channel division

7. In control channel deregister schedule Snoop state advertise subscribe

8. Scheduling • Message type • Request • Request-Ack • Request-Nack • Channel status • FREE • CAN RECEIVE ONLY • NEIGHBOR USE • SUBSCRIBER RECEIVE • TRANSMIT

10. Energy consumption

11. Experiments

19. Conclusions • Divide the communication medium into separate control and data channels • Data communications take place on independent data channels that are organized to be collision-free • Minimize the data communications and to improve the chances of data aggregation during data collection

20. Q&A