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      Maximizing System Throughput Using Cooperative Sensing in Multi-Channel Cognitive Radio Networks

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          Abstract

          In Cognitive Radio Networks (CRNs), unlicensed users are allowed to access the licensed spectrum when it is not currently being used by primary users (PUs). In this paper, we study the throughput maximization problem for a multi-channel CRN where each SU can only sense a limited number of channels. We show that this problem is strongly NP-hard, and propose an approximation algorithm with a factor at least \(1/2\mu\) where \(\mu \in [1,2]\) is a system parameter reflecting the sensing capability of SUs across channels and their sensing budgets. This performance guarantee is achieved by exploiting a nice structural property of the objective function and constructing a particular matching. Our numerical results demonstrate the advantage of our algorithm compared with both a random and a greedy sensing assignment algorithm.

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          Optimal multi-channel cooperative sensing in cognitive radio networks

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            Sequential and Cooperative Sensing for Multi-Channel Cognitive Radios

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              “Product Partition” and related problems of scheduling and systems reliability: Computational complexity and approximation

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                Author and article information

                Journal
                15 November 2012
                Article
                1211.3666
                734cd602-5811-4f8c-9355-3d024f5809e4

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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                cs.NI

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