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 [...]... 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 • Prototype • Results • Results • Related Work • Recent Addition • Conclusions • Power consumption of Soekris acting as a router/switch with two wireless 802.11b cards = 7.7W (typical) • Boot-up... Related Work • Recent Addition • Conclusions • On-demand, course-grained power on/off of networking equipments at a remote site • Use of off 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...• Introduction • Motivation • Prototype • Results Implementation Details • Use of Chipcon’s CC2420 CCA mode • Configurable frequency and energy threshold parameters • Relay based switching circuit – Does not store the state Wake-on-WLAN • Results • Related Work • Recent Addition • Conclusions CCA . bridge/router – Directional Antenna – RF cable for connections *http://www.hyperlinktech.com/web/hg2424g.php * • Introduction • Related Work • Motivation • Results • Prototype • Recent Addition •. Wake-on-WLAN in long distance settings Wake-on-WLAN Wake-on-WLAN Nilesh Mishra, Kameswari Chebrolu, Bhaskaran Raman and Abhinav Pathak IIT Kanpur • Power consumption of Soekris acting as a router/switch. 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 •