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A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu...
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![Page 1: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/1.jpg)
A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks
Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui
Beijing University of Posts and Telecommunications
Beijing, China
IEEE WiCOM 2010
![Page 2: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/2.jpg)
Outline
• Introduction• System model• TA-MAC• Simulation• Conclusion
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Introduction
• All medium access control (MAC) protocols for wireless networks try to make sure that no node should interfere with other nodes
![Page 4: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/4.jpg)
Introduction
• An additional consideration for wireless sensor networks is to manage radio's activity to conserve energy
• While traditional MAC protocols must balance throughput, delay and fairness
![Page 5: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/5.jpg)
Introduction
• Energy consumption on sensor– Collision– Overhearing– Idle listening
![Page 6: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/6.jpg)
Introduction
• In recent research efforts, a duty cycle is used in sensor nodes to reduce energy waste caused by idle listening– S-MAC– T-MAC
![Page 7: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/7.jpg)
Introduction
• S-MAC
active active active activesleep sleep sleep sleep
Time
active active active activesleep sleep sleep sleep
Sensor A
Sensor B
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Introduction
• Drawbacks in S-MAC– Energy wasted– Packet dropped
![Page 9: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/9.jpg)
Introduction
• T-MAC
Time
active active active activesleep sleep sleep sleepSensor A
![Page 10: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/10.jpg)
Introduction
• Drawbacks in T-MAC– Packet latency– Packet dropped
![Page 11: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/11.jpg)
Goal
• Propose a new TA-MAC protocol in this paper– Adaptive contention window– BS packet
![Page 12: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/12.jpg)
System model
• Duty cycle and synchronization• Four way handshake• Active period (AP)
BSCSPRCWAP
Contention window
Transmission time of RTS
Transmission time of CTS
Short period between
RTS and CTS
Transmission time of BS
![Page 13: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/13.jpg)
TA-MAC
• Adaptive contention window– Buffer threshold
2
WindowContention
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TA-MAC
A
B
C
D
E
FTime
RTS CTS
CTS
RTS
RTS
CTS
A B C D E F
BS
BS
waitingBS
BS
PS
PS
DATA
DATA ACK
ACK
R
C
C
R
D
D A
A
R
C
C
R
D
D A
A
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Simulation
• Simulation setup
Parameter Value
Topology 10 Line / 10*10 grid
Active period 20 ms
Frame length 650 ms
Data packet size 100 bytes
Transmitting energy 10 mA
Receiving and idle energy 4 mA
Sleeping energy 20 μA
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Simulation result
• Line topology
![Page 17: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/17.jpg)
Simulation result
• Line topology
![Page 18: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/18.jpg)
Simulation result
• Grid topology
![Page 19: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/19.jpg)
Simulation result
• Grid topology
![Page 20: A Throughput-Adaptive MAC Protocol for Wireless Sensor Networks Zuo Luo, Liu Danpu, Ma Yan, Wu Huarui Beijing University of Posts and Telecommunications.](https://reader034.fdocuments.us/reader034/viewer/2022051622/5697c01b1a28abf838ccf769/html5/thumbnails/20.jpg)
Conclusion
• In this paper the authors proposed two new mechanisms to improve throughput and latency for WSNs
• The simulation results shows that TA-MAC protocol achieves significant trade-off on throughput and energy efficiency
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Thanks for your at tention