Joint optimisation of application QoS and energy conservation in grid environment

Abstract

Mobile and wireless devices with limited energy are now of interest for the grid community. Reducing the related energy consumption is very important for wireless devices. Compared to conventional grid systems, energy aware grids need to support application quality of service (QoS) with limited energy. There is an inherent conflict in the design goals for high grid application QoS and low energy consumption. To address this challenging problem, this article considers joint optimisation of application QoS and energy conservation in grid environment. Joint optimisation of application QoS and energy conservation is targeted to maximise the system utility without exceeding the deadline and the total energy available, which can be provided by an exhaustible source such as a battery. This article formulates joint optimisation of application QoS and energy conservation as constrained maximisation problem; the constraints include energy budget and application QoS requirements. This article also presents a QoS and energy aware scheduling algorithm (QESA) which balances application QoS and energy conservation to improve system performance. In the simulation, the performance evaluation of QESA is conducted.

Keywords:

• energy conservation
• joint optimisation
• grid
• grid computing
• communication system
• resource management

Acknowledgements

The authors thank the editor and the anonymous reviewers for their helpful comments and suggestions. The work is supported by National Natural Science Foundation of China (NSF) under grants (No. 60773211, No. 60970064), Program for New Century Excellent Talents in University, China (NCET-08-0806) the National Science Foundation of HuBei Province under Grant No. 2008CDB335 and the Fok Ying-Tong Education Foundation, China (Grant No. 121067), and the Fundamental Research Funds for the Central Universities (2010-II-003). Any opinions, findings and conclusions are those of the authors and do not necessarily reflect the views of the above agencies.