JCSE, vol. 9, no. 3, pp.155-162, September, 2015

DOI: http://dx.doi.org/10.5626/JCSE.2015.9.3.155

User Mobility Model Based Computation Offloading Decision for Mobile Cloud

Kilho Lee and Insik Shin
School of Computing, Korea Advanced Institute of Science and Technology, Daejeon, Korea

Abstract: The last decade has seen a rapid growth in the use of mobile devices all over the world. With an increasing use of mobile devices, mobile applications are becoming more diverse and complex, demanding more computational resources. However, mobile devices are typically resource-limited (i.e., a slower-speed CPU, a smaller memory) due to a variety of reasons. Mobile users will be capable of running applications with heavy computation if they can offload some of their computations to other places, such as a desktop or server machines. However, mobile users are typically subject to dynamically changing network environments, particularly, due to user mobility. This makes it hard to choose good offloading decisions in mobile environments. In general, users??mobility can provide some hints for upcoming changes to network environments. Motivated by this, we propose a mobility model of each individual user taking advantage of the regularity of his/her mobility pattern, and develop an offloading decision-making technique based on the mobility model. We evaluate our technique through trace-based simulation with real log data traces from 14 Android users. Our evaluation results show that the proposed technique can help boost the performance of mobile devices in terms of response time and energy consumption, when users are highly mobile.

Keyword: Mobile cloud; Computation offloading; Mobility; Cyber physical systems

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