1. Power Controlled Network Protocols for Multi- Rate Ad Hoc Networks Pan Li +, Qiang Shen*, Yuguang Fang +, and Hailin Zhang # +: EE, Florida University *:Southwest Jiaotong University #: Xidain University IEEE Transactions on Wireless Communications, Vol. 8, No. 4, April 2009 1

2. Outline Introduction Related Works MRPC-MAC protocol MRPC-Routing protocol Simulation Results Conclusions 2

3. Introduction In wireless ad hoc networks –Power control Save energy Increase spatial reuse –Multi-Rate supported Improve network throughput –What is right next hop relay?? Routing protocol 3

4. Related Works Power controlled MAC –Save the energy –Increase the throughput Power controlled Routing –Find an end-to-end path with saving energy Cross Layer Design –In this paper: MAC+ Routing protocol with power control for multi-rate ad hoc network 4

5. STAs –Single radio –Single channel –Multi-Rate supported : ARF MAC transmission failures or successes –Maintenance information of neighboring nodes i Assumption 5 j k m

6. MRPC-MAC protocol 6 ij k m IDP min,1 …P min,M P max FTime K1mW…1.7mW1.2mW150us

7. MRPC-MAC protocol Overhearing RTS/CTS 7

8. MRPC-Routing protocol 8

9. 9

10. Simulation Results NS2.29 10

11. Performance of MRPC-MAC 11

12. Performance of MRPC-Routing 12

13. MRPC Protocol 13

14. Impacts of the number of nodes 14

15. MRPC with mobility 15

16. Conclusions A new power controlled cross- layer –MRPC-MAC –MRPC-Routing Improve the network throughput Future work –Optimal the end-to-end path 16

17. Thank You. 17