The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Electronic shepherd - a low-cost, low-bandwidth, wireless network system
Proceedings of the 2nd international conference on Mobile systems, applications, and services
The flooding time synchronization protocol
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
Hardware design experiences in ZebraNet
SenSys '04 Proceedings of the 2nd international conference on Embedded networked sensor systems
A line in the sand: a wireless sensor network for target detection, classification, and tracking
Computer Networks: The International Journal of Computer and Telecommunications Networking - Special issue: Military communications systems and technologies
Fine-grained network time synchronization using reference broadcasts
OSDI '02 Proceedings of the 5th symposium on Operating systems design and implementationCopyright restrictions prevent ACM from being able to make the PDFs for this conference available for downloading
Rate-adaptive time synchronization for long-lived sensor networks
SIGMETRICS '05 Proceedings of the 2005 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Low-power clock synchronization using electromagnetic energy radiating from AC power lines
Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
Energy-accuracy trade-off for continuous mobile device location
Proceedings of the 8th international conference on Mobile systems, applications, and services
Energy-efficient rate-adaptive GPS-based positioning for smartphones
Proceedings of the 8th international conference on Mobile systems, applications, and services
Indoor localization without the pain
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Revealing the hidden lives of underground animals using magneto-inductive tracking
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
Hijacking power and bandwidth from the mobile phone's audio interface
Proceedings of the First ACM Symposium on Computing for Development
Mobile Sensor Navigation Using Rapid RF-Based Angle of Arrival Localization
RTAS '11 Proceedings of the 2011 17th IEEE Real-Time and Embedded Technology and Applications Symposium
Rapid detection of rare geospatial events: earthquake warning applications
Proceedings of the 5th ACM international conference on Distributed event-based system
Proceedings of the ACM SIGCOMM 2011 conference
LEAP: a low energy assisted GPS for trajectory-based services
Proceedings of the 13th international conference on Ubiquitous computing
Demo: Creating interactive virtual zones in physical space with magnetic-induction
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
Proceedings of the 10th international conference on Mobile systems, applications, and services
The CLEO mobile sensing platform
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Camazotz: multimodal activity-based GPS sampling
Proceedings of the 12th international conference on Information processing in sensor networks
CEGF: corner extraction by GPS filtering for power-efficient location uploading
Proceeding of the 11th annual international conference on Mobile systems, applications, and services
SparseGPS: energy efficient GPS acquisition via sparse approximation
Proceedings of the 11th ACM Conference on Embedded Networked Sensor Systems
High-sensitivity cloud-offloaded instant GPS for indoor environments
Proceedings of the 11th ACM Conference on Embedded Networked Sensor Systems
ACM SIGMOBILE Mobile Computing and Communications Review
When assistance becomes dependence: characterizing the costs and inefficiencies of A-GPS
ACM SIGMOBILE Mobile Computing and Communications Review
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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 post-processing. 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.