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Energy Efficient MAC Protocol with Power and Rate Control in Multi-rate ad hoc networks. Masaki Bandai, Satoshi Maeda, and Takashi Watanabe Dept. of Computer Science, Shizuoka ( 靜 岡 ) University. IEEE Vehicular Technology Conference, 2008. Outline. Introduction Assumption Protocol
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Energy Efficient MAC Protocol with Power and Rate Control in Multi-rate ad hoc networks Masaki Bandai, Satoshi Maeda, and Takashi Watanabe Dept. of Computer Science, Shizuoka (靜岡) University IEEE Vehicular Technology Conference, 2008
Outline • Introduction • Assumption • Protocol • Simulation • Conclusion
Introduction • Motivation • Extending the life of battery is the more important issue in the ad hoc network. • Direct?? • Relay??
Introduction Direct DATA D S ACK A
Introduction Relay ACK D S DATA DATA A
Assumption • Each node prepares a table that includes energy efficiency of all combinations of transmission power and rate.
Protocol Cisco Aironet 350
Protocol P0 is the maximum transmission power . R0 is the base transmission rate.
Protocol E(Pi,Rj) is the energy consumption when transmission power Pi and rate Rj are adopted.
Protocol π(Pi,Rj) dBm is required power to receive a data.
Protocol • When a node receives a control frame such as RTS, the node measures the received power. • Result = PdBm
Protocol B RTS D S A
Protocol B D S A Node D check the Sequence selection threshold ThdBm.
Protocol PBackoff : 10 B RTR D S A PBackoff : 3
Protocol PBackoff : 7 B D S CTR A PBackoff : 0
Protocol B ACK D S DATA DATA A
Protocol • NAV problem • when a node receives a RTS or a RTR, it sets Dnav.
Protocol • We assume that number of priority levels is L (level 1 to L), maximum backoff time is Tmaxslottime.
Protocol Result : 0.14 L=3
Protocol 30
Simulation Simulator in C# language
Conclusion • In this paper, a novel MAC protocol with transmission power and rate control has been proposed to realize high energy efficient data transmission.
