Hardware Platform for the Energy efficient GPS sensing with Cloud Offloading
Location is a fundamental service for mobile computing. Typical GPS receivers, although widely available, consume too much energy to be useful for many applications. Observing that in many sensing scenarios, the location information can be post-processed when the data is uploaded to a server, we design a Cloud-Offloaded GPS (CO-GPS) solution that allows a sensing device to aggressively duty-cycle its GPS receiver and log just enough raw GPS signal for postprocessing. Leveraging publicly available information such as GNSS satellite ephemeris and an Earth elevation database, a cloud service can derive good quality GPS locations from a few milliseconds of raw data. Using our design of a portable sensing device platform called CLEO, we evaluate the accuracy and efficiency of the solution. Compared to more than 30 seconds of heavy signal processing on standalone GPS receivers, we can achieve three orders of magnitude lower energy consumption per location tagging.
- RESEARCH PUBLICATION
- Jie Liu, Bodhi Priyantha, Ted Hart, Yuzhe Jin, Woo Suk Lee, Heitor S. Ramos, Antonio A.F. Loureiro Qiang Wang, and Vijay Raghunathan, “Energy Efficient GPS Sensing with Cloud Offloading,” IEEE Transaction on Mobile Computing (TMC), Vol. 15, Issue 6, pp. 1348–1361, June 2016.
- Woo Suk Lee, Bodhi Priyantha, Ted Hart, Gerald DeJean, Yan Xu, and Jie Liu, “Demo Abstract: The CLEO mobile sensing platform,” demo in the 10th ACM international conference on embedded networked sensor systems (SenSys 2012), pp.371–372, Toronto, CA, USA, Nov 2012.
(This is a demo version of SenSys 2012 ‘Best Paper’ named “Energy-Efficient GPS Sensing with Cloud Offloading”)
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