A sensor converts physical world characteristics into information that can then be processed using information technology tools. Sensor fusion is the process by which data points are combined from multiple sensors to yield the best estimate of the overall state of the system being observed. Battery life is the most critical measure for any device with built in sensors. Watch ARM's live Google+ Hangout on Air panel discussion with guests panelists from Atmel, Freescale, and Sensor Platforms. Our panelists will explore the various levels of software and hardware design techniques to address the opposing needs of low power and high software complexity.
http://community.arm.com/groups/smart-and-connected/blog/2014/02/05/internet-of-things-complexity-of-software-for-sensor-fusion-on-arms-google-hangout-on-air