An important feature of a modern mobile device is that it can position itself and support remote position tracking. To be useful, such position tracking has to be energy-efficient to avoid having a major impact on the battery life of the mobile device. Furthermore, tracking has to robustly deliver position updates when faced with changing conditions such as delays and changing positioning conditions. Previous work has established dynamic tracking systems, such as our EnTracked system, as a solution to address these issues. In this paper we propose a responsibility division for position tracking into sensor management strategies and position update protocols and combine the sensor management strategy of EnTracked with position update protocols, which enables the system to further reduce the power consumption with up to 268 mW extending the battery life with up to 36\%. As our evaluation identify that classical position update protocols have robustness weaknesses we propose a method to improve their robustness. Furthermore, we analyze the dependency of tracking systems on the pedestrian movement patterns and positioning environment, and how the power savings depend on the power characteristics of different mobile devices.
Lecture Notes of the Institute for Computer Sciences, Social-informatics and Telecommunications Engineering: 7th International Icst Conference, Mobiquitous 2010, Sydeny, Australia, December 6-9, 2010, Revised Selected Papers, 2012, p. 162-173
energy-efficiency; positioning; mobile devices; power consumption; GPS; position update protocols
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Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
The 7th International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services (MobiQuitous 2010)International Conference on Mobile and Ubiquitous Systems: Networking and Services