A novel energy efficiency (ee)-orientedcognitivespectrumsharingscheme in heterogeneous cognitive radio networks, called energy-efficient cognitive cooperation (ECC) is proposed, in which the primary system release...
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A novel energy efficiency (ee)-orientedcognitivespectrumsharingscheme in heterogeneous cognitive radio networks, called energy-efficient cognitive cooperation (ECC) is proposed, in which the primary system release a part of its radio spectrum to the secondary system in exchange for secondary user (SU) served as a relay to assist the transmission of the primary user (PU) traffic. On the basis of ECC scheme, an ee maximisation non-convex problem for SUs is formulated under the circuit power consumption and the QoS requirements as well as power constraints. By virtue of parametric Dinkelbach's algorithm and golden section search method, an efficient resource allocation algorithm is developed. Simulation results show that our proposals attain significantly higher ee compared with the non-cooperation transmission without sacrificing the performance of PU's QoS, and thus, a 'win-win' situation is achieved.
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