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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 - PowerPoint PPT Presentation
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1
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 ) UniversityIEEE Vehicular Technology Conference, 2008
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Outline
Introduction Assumption Protocol Simulation Conclusion
3
Introduction
Motivation Extending the life of battery is the
more important issue in the ad hoc network.
Direct?? Relay??
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Introduction
S
A
DDATA
ACK
Direct
5
Introduction
S
A
D
DATADATA
ACK
Relay
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Assumption
Each node prepares a table that includes energy efficiency of all combinations of transmission power and rate.
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Protocol
Cisco Aironet 350
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Protocol
P0 is the maximum transmission power .
R0 is the base transmission rate.
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Protocol
E(Pi,Rj) is the energy consumption when transmission power Pi and rate Rj are adopted.
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Protocol
π(Pi,Rj) dBm is required power to receive a data.
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Protocol
When a node receives a control frame such as RTS, the node measures the received power.
Result = P dBm
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Protocol
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Protocol
S
A
DRTS
B
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Protocol
S
A
D
Node D check the Sequence selection threshold Th dBm.
B
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Protocol
S
A
DRTR
PBackoff : 10
PBackoff : 3
B
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Protocol
S
A
D
PBackoff : 7
PBackoff : 0
CTR
B
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Protocol
S
A
D
B
DATADATA
ACK
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Protocol
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Protocol
NAV problem when a node receives a RTS or a
RTR,it sets Dnav.
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Protocol
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Protocol
We assume that number of priority levels is L (level 1 to L), maximum backoff time is Tmax slottime.
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Protocol
Result : 0.14
3
667.014.0
3
667.0)1( ll L=3 1l
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Protocol
L
TlT
L
Tl backoff
maxmax)1(
3
301
3
30)11( backoffT
30
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Simulation
Simulator in C# language
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Simulation
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Simulation
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Simulation
28
Simulation
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Simulation
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Simulation
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Conclusion
In this paper, a novel MAC protocol with transmission power and rate control has been proposed to realize high energy efficient data transmission.
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