Paper Info
Title
An analysis of power consumption in a smartphone
Abstract
Mobile consumer-electronics devices, especially phones, are powered from batteries which are limited in size and therefore capacity. This implies that managing energy well is paramount in such devices. Good energy management requires a good understanding of where and how the energy is used. To this end we present a detailed analysis of the power consumption of a recent mobile phone, the Openmoko Neo Freerunner. We measure not only overall system power, but the exact breakdown of power consumption by the device's main hardware components. We present this power breakdown for micro-benchmarks as well as for a number of realistic usage scenarios. These results are validated by overall power measurements of two other devices: the HTC Dream and Google Nexus One. We develop a power model of the Freerunner device and analyse the energy usage and battery lifetime under a number of usage patterns. We discuss the significance of the power drawn by various components, and identify the most promising areas to focus on for further improvements of power management. We also analyse the energy impact of dynamic voltage and frequency scaling of the device's application processor.
Year
Venue
Keywords
2010
USENIX Annual Technical Conference
energy impact,power model,power management,overall system power,good energy management,energy usage,overall power measurement,freerunner device,power breakdown,power consumption
Field
DocType
Citations 
Power management,Energy management,Simulation,Computer science,Voltage,Real-time computing,Nexus (standard),Frequency scaling,Mobile phone,Battery (electricity),Reliability engineering,Power consumption
Conference
225
PageRank 
References 
Authors
11.39
6
2
Search Limit
100225
Name
Order
Citations
PageRank
Aaron Carroll133015.98
Gernot Heiser22525137.42