Cross-layer Optimization in Cognitive Radio Cellular Networks with applications in Railway Sensing Systems

In a Cognitive radio Cellular network (CogCell), Primary Users (PUs) rarely utilize all the assigned frequency bands in the given time period and the locations. The spectral inefficiency caused by the spectrum holes motivated Cognitive Radio technology (CR) that presents unlicensed Secondary Users (SUs) an opportunity for using spectrum holes. In this paper, the authors investigate the exactly same cross-layer optimization problem (e.g., revenue maximization) that has been formulated in but focusing on a special scenario with upper bounded interference from SUs to PUs and exploring the better solution in terms of the approximation ratio.

Provided by: Binary Information Press Topic: Networking Date Added: Jun 2014 Format: PDF

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