Energy Efficient Mac Apps
An Energy-Efficient MAC protocol for Wireless Sensor Networks
Wei Ye, John Heidemann and Deborah Estrin
Citation
/app-to-open-thumb-drive-bup-files-on-mac.html. Wei Ye, John Heidemann and Deborah Estrin. An Energy-Efficient MAC protocol for Wireless Sensor Networks. Proceedings of the IEEE Infocom (New York, NY, USA, Jun. 2002), 1567–1576. [PDF] [alt PDF]
This free app was introduced during the Department of Energy’s 2012 “Apps for. Your Mac tracks the “energy impact” of each running application in a few places. Like on an iPhone or iPad, you can see exactly which apps are using the most power, and adjust your usage accordingly so you don’t run out of juice. Applications aren’t the only thing draining battery power, of course. Energy Consumption Analyzer. This app helps users to track their energy consumption by adding meters for various types of energy. Users can colour-code readings and comment as a way to remind themselves of special situations where they consumed unusual amounts of energy. The app will calculate the average rate of use per hour, day, week.
Abstract
This paper proposes S-MAC, a medium-access control (MAC) protocoldesigned for wireless sensor networks. Wireless sensor networks usebattery-operated computing and sensing devices. A network of thesedevices will collaborate for a common application such asenvironmental monitoring. We expect sensor networks to be deployed inan ad hoc fashion, with individual nodes remaining largely inactivefor long periods of time, but then becoming suddenly active whensomething is detected. These characteristics of sensor networks andapplications motivate a MAC that is different from traditionalwireless MACs such as IEEE 802.11 in almost every way: energyconservation and self-configuration are primary goals, while per-nodefairness and latency are less important. S-MAC uses three noveltechniques to reduce energy consumption and supportself-configuration. To reduce energy consumption in listening to anidle channel, nodes periodically sleep. Neighboring nodes formvirtual clustersEnergy Efficient Mac Apps Downloads
to auto-synchronize on sleepschedules. Inspired by PAMAS, S-MAC also sets the radio to sleepduring transmissions of other nodes. Unlike PAMAS, it only usesin-channel signaling. Finally, S-MAC applies
message passing toreduce contention latency for sensor-network applications that requirestore-and-forward processing as data move through the network. Weevaluate our implementation of S-MAC over a sample sensor node, theMote, developed at University of California, Berkeley. The experimentresults show that, on a source node, an 802.11-like MAC consumes 2–6times more energy than S-MAC for traffic load with messages sent every1–10s.