Tài liệu Wake-on-WLAN ppt

Wake-on-WLAN
Wake-on-WLAN
Nilesh Mishra, Kameswari Chebrolu,
Bhaskaran Raman and Abhinav Pathak
IIT Kanpur
Wake-on-WLAN
Nilesh Mishra, Bhaskaran Raman,
Abhinav Pathak
Department of Computer Science
and Engineering, IIT Kanpur
Power management for 802.11 mesh networks using
802.15.4
Kameswari Chebrolu
Department of Electrical
Engineering, IIT Kanpur
Wake-on-WLAN
Wake-on-WLAN
Nilesh Mishra, Kameswari Chebrolu,
Bhaskaran Raman and Abhinav Pathak
IIT Kanpur
802.11 Mesh Network
•
802.11 designed for
indoor usage
•
Usage of 802.11 for
long distance
connectivity
•
Power as a constraint

•
Lack of support in
current hardware
•
Wake-on-WLAN
• Introduction
• Related Work
• Motivation
• Results
• Prototype
• Recent Addition
• Results • Conclusions
Summary: Current 802.11 hardware is
not power efficient but is being used to
provide long distance connectivity
Wake-on-WLAN
Wake-on-WLAN
Nilesh Mishra, Kameswari Chebrolu,
Bhaskaran Raman and Abhinav Pathak
IIT Kanpur
Power Consumption
Measurements
•
A typical mesh node
–
Single board
computer based
802.11 bridge/router
–
Directional Antenna

–
RF cable for
connections
* />*
• Introduction
• Related Work
• Motivation
• Results
• Prototype
• Recent Addition
• Results • Conclusions
Wake-on-WLAN
Wake-on-WLAN
Nilesh Mishra, Kameswari Chebrolu,
Bhaskaran Raman and Abhinav Pathak
IIT Kanpur
Power Consumption
Measurements (continued)
Observations on power
consumption:
•
Increases with insertion of card
•
Higher for Tx than Rx
•
Considerable variation over
different card makes
Summary: Even idle power
consumption is significant
• Introduction

• Related Work
• Motivation
• Results
• Prototype
• Recent Addition
• Results • Conclusions
Wake-on-WLAN
Wake-on-WLAN
Nilesh Mishra, Kameswari Chebrolu,
Bhaskaran Raman and Abhinav Pathak
IIT Kanpur
Trivial solution
Node 1
Node 1
Node 2
Node 2
Node 3
Node 3
Node 4
Node 4
Wired Gateway
Wired Gateway
• Introduction
• Related Work
• Motivation
• Results
• Prototype
• Recent Addition
• Results • Conclusions
Wake-on-WLAN

Wake-on-WLAN
Nilesh Mishra, Kameswari Chebrolu,
Bhaskaran Raman and Abhinav Pathak
IIT Kanpur
Requirements
Node 1
Node 1
Node 2
Node 2
Node 3
Node 3
Node 4
Node 4
Wired Gateway
Wired Gateway
• Introduction
• Related Work
• Motivation
• Results
• Prototype
• Recent Addition
• Results • Conclusions
Wake-on-WLAN
Wake-on-WLAN
Nilesh Mishra, Kameswari Chebrolu,
Bhaskaran Raman and Abhinav Pathak
IIT Kanpur
WOW!
Node 1
Node 1

Node 2
Node 2
Node 3
Node 3
Node 4
Node 4
Wired Gateway
Wired Gateway
• Introduction
• Related Work
• Motivation
• Results
• Prototype
• Recent Addition
• Results • Conclusions
Wake-on-WLAN
Wake-on-WLAN
Nilesh Mishra, Kameswari Chebrolu,
Bhaskaran Raman and Abhinav Pathak
IIT Kanpur
IEEE 802.15.4
•
Energy optimized
•
Low cost radio (< $5)
•
Works in the same
2.4GHz as 802.11
•
Sensor motes

Microcontroller
Microcontroller
Power Supply
Subsystem
Power Supply
Subsystem
Communication
Subsystem
Communication
Subsystem
Sensing Subsystem
Sensing Subsystem
Application Layer
Subsystem
Application Layer
Subsystem
CPU
Memory
Radio
Radio
Software
Sensor
ADC/DAC
Battery
Battery
• Introduction
• Related Work
• Motivation
• Results
• Prototype

• Recent Addition
• Results • Conclusions
Wake-on-WLAN
Wake-on-WLAN
Nilesh Mishra, Kameswari Chebrolu,
Bhaskaran Raman and Abhinav Pathak
IIT Kanpur
Architecture
Node 1
Node 1
Node 2
Node 2
Node 3
Node 3
Node 4
Node 4
Wired Gateway
Wired Gateway
•
Nodes turned off
•
Remote turn on
•
Multi-hop setting
•
Delay due to boot
up
• Introduction
• Related Work
• Motivation

• Results
• Prototype
• Recent Addition
• Results • Conclusions