The handbook of ad hoc wireless networks
The handbook of ad hoc wireless networks
Electronic shepherd - a low-cost, low-bandwidth, wireless network system
Proceedings of the 2nd international conference on Mobile systems, applications, and services
Robust distributed node localization with error management
Proceedings of the 7th ACM international symposium on Mobile ad hoc networking and computing
The design and evaluation of a mobile sensor/actuator network for autonomous animal control
Proceedings of the 6th international conference on Information processing in sensor networks
Radio interferometric tracking of mobile wireless nodes
Proceedings of the 5th international conference on Mobile systems, applications and services
EnTracked: energy-efficient robust position tracking for mobile devices
Proceedings of the 7th international conference on Mobile systems, applications, and services
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
Adaptive GPS duty cycling and radio ranging for energy-efficient localization
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
PERVASIVE'06 Proceedings of the 4th international conference on Pervasive Computing
Camazotz: multimodal activity-based GPS sampling
Proceedings of the 12th international conference on Information processing in sensor networks
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GPS is a commonly used and convenient technology for determining absolute position in outdoor environments, but its high power consumption leads to rapid battery depletion in mobile devices. An obvious solution is to duty cycle the GPS module, which prolongs the device lifetime at the cost of increased position uncertainty while the GPS is off. This article addresses the trade-off between energy consumption and localization performance in a mobile sensor network application. The focus is on augmenting GPS location with more energy-efficient location sensors to bound position estimate uncertainty while GPS is off. Empirical GPS and radio contact data from a large-scale animal tracking deployment is used to model node mobility, radio performance, and GPS. Because GPS takes a considerable, and variable, time after powering up before it delivers a good position measurement, we model the GPS behavior through empirical measurements of two GPS modules. These models are then used to explore duty cycling strategies for maintaining position uncertainty within specified bounds. We then explore the benefits of using short-range radio contact logging alongside GPS as an energy-inexpensive means of lowering uncertainty while the GPS is off, and we propose strategies that use RSSI ranging and GPS back-offs to further reduce energy consumption. Results show that our combined strategies can cut node energy consumption by one third while still meeting application-specific positioning criteria.