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Mobile virtualization, emerging fairly recently, is considered to be a valuable way to mitigate security risks on Android devices. In this paper, we propose a lightweight Android virtualization solution based on container technology, named Condroid. Condroid includes resource isolation based on namespace feature and resource control based on cgroups feature. By leveraging them, Condroid can host several...
In cognitive radio networks, the available vacant frequency bands, referred to as spectrum holes, are usually discontinuous. Hence, it is hard to exploit these vacant frequency bands since the bandwidth of single one may not be able to meet the wide bandwidth requirement of secondary users (SUs). Spectrum aggregation (SA) enables SUs to access several discontinuous spectrum holes simultaneously to...
Dynamic spectrum sharing plays a critical role in cognitive radio for the efficient spectrum utilization. In this paper, we consider a cooperative spectrum leasing model, in which the primary user (PU) may lease part of its bandwidth to the secondary user (SU) in exchange for the cooperation to maximize its power saving, under the constraint that its target is guaranteed. In return, the SU can take...
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