Tech report number
CERIAS TR 2013-20
The proliferation of cloud computing resources in recent years offers a way for
mobile devices with limited resources to achieve computationally intensive tasks in
real-time. The mobile-cloud computing paradigm, which involves collaboration of
mobile and cloud resources in such tasks, is expected to become increasingly popular
in mobile application development. While mobile-cloud computing is promising to
overcome the computational limitations of mobile devices, the lack of frameworks
compatible with standard technologies makes it harder to adopt dynamic mobile-
cloud computing at large. In this dissertation, we present a dynamic code offloading
framework for mobile-cloud computing, based on autonomous agents. Our approach
does not impose any requirements on the cloud platform other than providing isolated
execution containers, and it alleviates the management burden of offloaded code by
the mobile platform using autonomous agent-based application partitions. We also
investigate the effects of different runtime environment conditions on the performance
of mobile-cloud computing, and present a simple and low-overhead dynamic makespan
estimation model for computation offloaded to the cloud that can be integrated into
mobile agents to enhance them with self-performance evaluation capability.
Offloading mobile computation to the cloud entails security risks associated with
handing sensitive data and code over to an untrusted platform. Security frameworks
for mobile-cloud computing are not very numerous and most of them focus only
on privacy, and ignore the very important aspect of integrity. Perfect security is
hard to achieve in real-time mobile-cloud computing due to the extra computational
overhead introduced by complex security mechanisms. In this dissertation, we propose a dynamic tamper-resistance approach for protecting mobile computation offloaded to
the cloud, by augmenting mobile agents with self-protection capability. The tamper-
resistance framework achieves very low execution time overhead and is capable of
detecting both load-time and runtime modications to agent code.
Lastly, we propose novel applications of mobile-cloud computing for helping context-
aware navigation by visually-impaired people. Specifically, we present the results of
a feasibility study for using real-time mobile-cloud computing for the task of guiding
blind users at pedestrian crossings with no accessible pedestrian signal.
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