Energy-AccuracyTrade-off

Energy-AccuracyTrade-off - EnergyaccuracyTradeoff

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Click to edit Master subtitle style  8/25/11 Albert Park EEL 6788: Advanced Topics in Computer  Networks Energy-Accuracy Trade-off for Continuous Mobile Device Location,  In Proc. of the 8th International Conference on Mobile  Systems,  Applications, and Services (MobiSys) Lin, K., Kansal, A., Lymberopoulos, D., and Zhao, F., 2010,  pp. 285-298 Energy-accuracy Trade-off 
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 8/25/11 Overview Mobile Location Service Purpose Observation Design
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 8/25/11 Mobile Location Service Methods for current mobile device localization GPS WiFi Cell-tower signature based  location service
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 8/25/11 Purpose Develop location as a system service that  automatically manages location sensor availability,  accuracy, and energy. Allows the system to optimize battery life by  intelligently managing the location energy and  accuracy trade-offs based on available sensor. Ensure long battery life for acceptable user 
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 8/25/11 Observation Two observations First, location applications do not always need the highest  available accuracy provided by GPS. Second, a phone has multiple modalities to sense location aside  from the GPS: WiFi triangulation, cell-tower triangulation,  Bluetooth vicinity, and audio or visual sensing.
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 8/25/11 Observation (cont.) Highest accuracy not always needed
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 8/25/11 a-Loc  Adaptive location service for mobile device Automatically determines the dynamic accuracy requirement  for mobile search applications  Continually tune the energy expenditure using the available  sensor A Bayesian estimation framework is used to model user location and sensor errors
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 8/25/11 System Overview Figure 1. System block diagram
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 8/25/11 Accuracy Models Dynamic Accuracy Requirement This block provides the location accuracy needed by the 
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This note was uploaded on 08/25/2011 for the course EEL 6788 taught by Professor Boloni,l during the Spring '08 term at University of Central Florida.

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Energy-AccuracyTrade-off - EnergyaccuracyTradeoff

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