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Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Wake-on-WLAN Nilesh Mishra, Bhaskaran Raman, Abhinav Pathak.

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Presentation on theme: "Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Wake-on-WLAN Nilesh Mishra, Bhaskaran Raman, Abhinav Pathak."— Presentation transcript:

1 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 mesh networks using Kameswari Chebrolu Department of Electrical Engineering, IIT Kanpur

2 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Mesh Network designed for indoor usage Usage of 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 hardware is not power efficient but is being used to provide long distance connectivity

3 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 bridge/router –Directional Antenna –RF cable for connections *http://www.hyperlinktech.com/web/hg2424g.php * Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

4 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

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

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

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

8 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur IEEE Energy optimized Low cost radio (< $5) Works in the same 2.4GHz as Sensor motes Microcontroller Power Supply Subsystem Communication Subsystem Sensing Subsystem Application Layer Subsystem Application Layer Subsystem CPU Memory Software Sensor ADC/DAC Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

9 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Architecture Node 1 Node 2 Node 3 Node 4 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

10 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Architecture RF switch or splitter Battery Power switching circuit Node 1 Antenna Node 2 Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

11 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur CCA modes of Clear if energy below threshold Clear if valid packet Clear if valid packet and energy below threshold Use of Chipcons CC2420 CCA mode Configurable frequency and energy threshold parameters Relay based switching circuit –Does not store the state Implementation Details Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions Summary: compliant radio is able to detect traffic

12 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Wake-on-WLAN Features On-demand, course-grained power on/off of networking equipments at a remote site. Use of off the shelf compliant sensor motes working in 2.4 GHz. Setting ideal for rural deployment. Usage of data channel itself for remote wake-up No separate antenna (shared with equipment). Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

13 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur A laptop with D-Link DWL b card running trafficgen application as data traffic source Packets of size 1462 bytes at 1Mbps with inter packet intervals of 10, 20 and 100ms Polling of CCA pin on sensor node every 3ms Detection of Transmission Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions Summary: Traffic pattern of successfully replicated on motes

14 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Validation on 3.5Km IITK-Mohanpur link on DGP testbed External antenna connected Calibrated card for determining RxPower Outdoor Evaluations Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions Summary: Low sensitivity of essential for working of Wake-on-WLAN in long distance settings

15 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Power consumption of Soekris acting as a router/switch with two wireless b cards = 7.7W (typical) Boot-up time for Soekris 50s VoIP service in Sarauhan in the DGP testbed –Usage pattern: 15 calls/day of 71s avg duration Sensor mote typical values: V cc = 2.8V and I = 23mA with CPU and Radio receiving. Example Scenario Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

16 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur E no_wow = P up x T up E wow = E mote + E bootup + E usage where –E mote = V mote x I mote x T idle –E bootup = P bootup x T bootup –E usage = P up x T active Using above values –E no_wow = 120 Whrs –E mote = 1.54Whrs –E bootup = 1.04Whrs –E usage = 7.73Whrs Example Scenario Thus power saving is: –(E no_wow – E wow )/ E no_wow –Greater than 91% Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

17 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Does not work on a Hibernation facility desired: faster boot-up Suffers from noise generated triggers Advanced usage: morphing topology More detailed study of usage pattern for better power savings. Discussion Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

18 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Narrow band RF detector Wake-On-Wireless [Shieh, et al] –Concept of smart brick and mini brick –Separate frequency channel for wake-up Turducken: Hierarchical power management for mobile devices [Sorber, et al] –Hierarchy of devices –Decomposition of task –Use of WiFi detectors Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions Summary: Usage scenario for Rural Networking and use of is unique Wake-on- Wireless TurduckenWake- on-LAN Separate antenna for detection Yes No Separate data and trigger channels YesNo Suitable for low cost long distance links No Yes Related Work

19 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Application Scenarios VOIP usage in a typical setup –10-30 calls of 1-2 minutes duration Solar Power WiFi (http://www.green-wifi.org/)http://www.green-wifi.org/ –Low cost solar powered WiFi grid. On-demand data retrieval for bridge monitoring. Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions Summary: Wake-on-WLAN is useful in energy constrained use of equipments

20 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Applications External Antenna Base node Node 4 Node 3Node 2 Node 1 IEEE IEEE BriMon Project With: Hemanth Haridas CSE, IIT Kanpur Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

21 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Application BriMon Project With: Hemanth Haridas CSE, IIT Kanpur Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

22 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Application BriMon Project With: Hemanth Haridas CSE, IIT Kanpur Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

23 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Signature pattern based Wake-on-WLAN –Checks for a pattern in a code window –Overcomes the problem of noise triggered false wake-up –Works in existence of periodic or non periodic noise. Improvements in switching circuit –Latching circuit –Transistor based switch New Developments Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions

24 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Lack of power save mode in current WiFi Mesh networking hardware Novel Wake-on-WLAN mechanism for multi hop remote on-demand wake-up of mesh nodes. Substantial power savings using Wake-on- WLAN (> 91%). Prototype tested and verified for rural deployment Newer applications emerging. Conclusions Introduction Related Work Motivation Results Prototype Recent Addition Results Conclusions Summary: Power management tools are required for current based networks deployed in energy constrained scenarios


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