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 *http://www.hyperlinktech.com/web/hg2424g.php * • 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 Wake-on-WLAN 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 [...]... bridge monitoring Wake-on-WLAN Summary: Wake-on-WLAN is useful in energy constrained use of 802.11 equipments Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur • Introduction • Motivation • Prototype • Results Applications • Results • Related Work • Recent Addition • Conclusions BriMon Project IE 80 EE 2 11 External Antenna Base node IEEE 802.15.4 Node 4 Wake-on-WLAN Node... Recent Addition • Conclusions • Validation on 3.5Km IITK-Mohanpur link on DGP testbed • External antenna connected • Calibrated 802.11 card for determining RxPower Wake-on-WLAN Summary: Low sensitivity of 802.15.4 essential for working of Wake-on-WLAN in long distance settings Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Example Scenario • Introduction • Motivation... not store the state Wake-on-WLAN • Results • Related Work • Recent Addition • Conclusions CCA modes of 802.15.4 • Clear if energy below threshold • Clear if valid 802.15.4 packet • Clear if valid 802.15.4 packet and energy below threshold Summary: 802.15.4 compliant radio is able to detect 802.11 traffic Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Wake-on-WLAN Features... Results • Related Work • Recent Addition • Conclusions BriMon Project Wake-on-WLAN With: Hemanth Haridas CSE, IIT Kanpur Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Application • Introduction • Motivation • Prototype • Results • Results • Related Work • Recent Addition • Conclusions BriMon Project Wake-on-WLAN With: Hemanth Haridas CSE, IIT Kanpur Nilesh Mishra, Kameswari... Results • Related Work • Recent Addition • Conclusions • 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 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak... Addition • Conclusions • 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-onWLAN (> 91%) • Prototype tested and verified for rural deployment • Newer applications emerging Wake-on-WLAN Summary: Power management tools are required for current 802.11 based networks deployed... work on 802.11a • 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 Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur • Introduction • Motivation • Prototype • Results Related Work • Narrow band RF detector • Wake-On-Wireless... ‘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 Wake-on-WLAN • Results • Related Work • Recent Addition • Conclusions Wake-onWireless Turducken Wakeon-LAN Separate antenna for detection Yes Yes No Separate data and trigger channels Yes No No Suitable... 802.11b 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 Wake-on-WLAN Summary: Traffic pattern of 802.11 successfully replicated on motes Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Outdoor Evaluations • Introduction • Motivation... the shelf 802.15.4 compliant sensor motes working in 2.4 GHz • Setting ideal for rural deployment • Usage of data channel itself for remote wakeup • No separate antenna (shared with 802.11 equipment) Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Detection of 802.11 Transmission • Introduction • Motivation • Prototype • Results • Results • Related Work . Wake-on-WLAN Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Wake-on-WLAN Nilesh Mishra,. detect 802.11 traffic Wake-on-WLAN Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur Wake-on-WLAN Features