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A novel cognitive MAC layer protocol towards 5G spectrum and energy efficiency

Future wireless networks are witnessing a major demand for mobile data, which necessitates reconsidering the design and deployment of their infrastructures. To fill this gap, the next-generation mobile 5G is defined as one of the promising solutions. Although the heterogeneous network, the small cell concept and the Cognitive Radio (CR) are considered as key drive technologies for 5G, the major challenge facing them is how to enhance the spectral efficiency system for an Ultra Dense Heterogeneous 5G Network (UDHetNet) while saving energy consumption. This paper suggests a novel media access control layer design for an UDHetNet, using the CR approach with a new sensing strategy through the dynamic common cognitive monitor channel protocol to overcome the encountered issue. Therefore, a closed-form expression of energy efficiency model is derived and analysed using the stochastic geometry system.