Power management for 802.11 mesh networks using 802.15.4

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 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 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 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 Trivial solution Node 1 Node 2 Node 3 Node 4 Wired Gateway • Introduction • Related Work • Motivation • Results • Prototype • Recent Addition • Results • Conclusions Requirements Node 1 Node 2 Node 3 Node 4 Wired Gateway • Introduction • Related Work • Motivation • Results • Prototype • Recent Addition • Results • Conclusions WOW! Node 1 Node 2 Node 3 Node 4 Wired Gateway • Introduction • Related Work • Motivation • Results • Prototype • Recent Addition • Results • Conclusions IEEE 802.15.4 Energy optimized Low cost radio ( 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 802.11 based networks deployed in energy constrained scenarios