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Co-operative Energy-Constrained Resource Management in Mobile Multimedia Environments

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Title: Co-operative Energy-Constrained Resource Management in Mobile Multimedia Environments
Author(s): Shah, Samarth H.; Nahrstedt, Klara; Yuan, Wanghong
Subject(s): mobile wireless devices
Abstract: Traditionally, the problem of minimizing energy consumption in mobile wireless devices has been addressed independently for various system components such as the CPU (via process management), network interface (via traffic management), I/O devices, etc. In this paper, we explore an integrated system architecture, consisting of co-operative process and network management, to perform multimedia streaming over a wireless LAN shared by several energy-constrained mobile devices. Co-operation among the system resource components is required so that they jointly yield the same operating QoS level for the application, under the device energy constraints. We maximize aggregate utility of all applications in a wireless LAN, while still meeting the system lifetime (i.e. energy usage), bandwidth usage, and computational capacity constraints of each mobile device. The key to co-operative energy-constrained process and network management is decoupling CPU-usage and network-usage time-scales. Consequently, both these system components minimize their individual energy consumption while still meeting the overall quality requirements of multimedia applications. Our experiments with a prototype h.263 application illustrate the benefit in terms of system energy-saving of using our scheme (34\% energy-saving on the base system and 42\% network energy-saving, for a device with a single application running at its highest QoS level), and its impact on application performance. We also demonstrate the flexibility of our architecture and its applicability to various mobile devices with different energy consumption characteristics.
Issue Date: 2005-05
Genre: Technical Report
Type: Text
URI: http://hdl.handle.net/2142/11024
Rights Information: You are granted permission for the non-commercial reproduction, distribution, display, and performance of this technical report in any format, BUT this permission is only for a period of 45 (forty-five) days from the most recent time that you verified that this technical report is still available from the University of Illinois at Urbana-Champaign Computer Science Department under terms that include this permission. All other rights are reserved by the author(s).
Date Available in IDEALS: 2009-04-17
 

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