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Broadcast Enhanced Cooperative Asynchronous Multichannel MAC for Wireless Ad Hoc Network. WAN YunHeng , CHEN Xi, LU JianHua Electronics Engineering Department Tsinghua University Beijing , China IEEE Wicom 2011. Outline. Introduction BMAC Simulation Conclusion. Introduction. - PowerPoint PPT Presentation
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Broadcast Enhanced Cooperative Asynchronous Multichannel MAC for Wireless Ad Hoc Network
WAN YunHeng, CHEN Xi, LU JianHua
Electronics Engineering Department
Tsinghua University Beijing, China
IEEE Wicom 2011
Outline
• Introduction• BMAC• Simulation• Conclusion
Introduction
• Increase wireless network capacity–Multiple channels– Broadcast specific data to a group receivers• Real time video• Sending notice• Advertisement message
Introduction
• Multiple channel– Good use of frequency resources– Increase the aggregate throughput
Introduction
• CAM-MAC– A single half-duplex transceiver– Control channel
Tie Luo, Mehul Motani, Vikram Srinivasan, Cooperative Asynchronous-Multichannel MAC: Design, Analysis, and Implementation, IEEE trans-action on mobile computing, Vol. 8, No. 3, March 2009
Introduction
• CAM-MAC
Time
transmitter
receiver
transmitter’sneighbor
receiver’sneighbor
PRA
PRA
PRA
CCAP
PRB
PRB
PRB
CCAP
CFA
CFA
CFA CFB
CFB
CFB
CFBTO
Introduction
• CAM-MAC
Time
transmitter
receiver
transmitter’sneighbor
receiver’sneighbor
PRA
PRA
PRA
CCAP
PRB
PRB
PRB
CCAP
CFA
CFA
CFA
CFBTO
NCF
NCF
NCF
INV
INV
Introduction
• CAM-MAC
Time
transmitter
receiver
transmitter’sneighbor
receiver’sneighbor
PRA
PRA
PRA
CCAP
PRB
PRB
PRB
CCAP
INV
INV Back off
Introduction
• CAM-MAC in broadcast scenario
11
1
1
2
1
A
B
C
D
Goal
• Propose a broadcast enhanced CAM-MAC called BMAC– The benefits of unicast in CAM-MAC are reserved– Efficient broadcast is introduced
System model
• A single half-duplex transceiver• A control channel and other data channel• Non-synchronization
BMAC
Time
transmitter
receiver
Two hopneighbor
Two hopneighbor
receiver
BPRA
BPRA
BPRA
BPT
Hidden terminal problem
Hidden terminal problem
Channel sw
itch
BMAC
Time
transmitter
receiver
Two hopneighbor
Two hopneighbor
receiver
BPRA
BPRA
BPRA
BPRA
BPRA
RI
RI
RI
BPT
BPRA
BPRA
BPRA
BPRA
BPRA
RI
RI
RI
Channel sw
itch
BMAC
• In BPT
Time
transmitter
receiver
Two hopneighbor
BPT
PRA
PRA
PRA
CCAP
BINV
BINV
Simulation
• Simulation setup
Parameter Value Topology 6*6 grid
Data packet size 1500 bytes
Data rate 54 Mbps
Simulation result
• Throughput
Simulation result
• Packet size
Simulation result
• Unicast and broadcast throughput
Conclusion
• The authors proposed a broadcast enhanced MAC protocol called BMAC in this paper– Ensure the compatibility of broadcast and unicast
traffic
• Simulation result shows that the new protocol increases the network performance in broadcast and unicast mixed environment
20
Thanks for your at tention