tailieunhanh - Báo cáo hóa học: " Research Article Observations on Power-Efficiency Trends in Mobile Communication Devices"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Observations on Power-Efficiency Trends in Mobile Communication Devices | Hindawi Publishing Corporation EURASIP Journal on Embedded Systems Volume 2007 Article ID 56976 10 pages doi 2007 56976 Research Article Observations on Power-Efficiency Trends in Mobile Communication Devices Olli Silven1 and Kari Jyrkka2 1 Department of Electrical and Information Engineering University of Oulu . Box 4500 90014 Linnanmaa Finland 2 Technology Platforms Nokia Corporation Elektroniikkatie 3 90570 Oulu Finland Received 3 July 2006 Revised 19 December 2006 Accepted 11 January 2007 Recommended by Jarmo Henrik Takala Computing solutions used in mobile communications equipment are similar to those in personal and mainframe computers. The key differences between the implementations at chip level are the low leakage silicon technology and lower clock frequency used in mobile devices. The hardware and software architectures including the operating system principles are strikingly similar although the mobile computing systems tend to rely more on hardware accelerators. As the performance expectations of mobile devices are increasing towards the personal computer level and beyond power efficiency is becoming a major bottleneck. So far the improvements of the silicon processes in mobile phones have been exploited by software designers to increase functionality and to cut development time while usage times and energy efficiency have been kept at levels that satisfy the customers. Here we explain some of the observed developments and consider means of improving energy efficiency. We show that both processor and software architectures have a big impact on power consumption. Properly targeted research is needed to find the means to explicitly optimize system designs for energy efficiency rather than maximize the nominal throughputs of the processor cores used. Copyright 2007 O. Silven and K. Jyrkka. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any

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