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Efficient Spectrum Sensing for the Relay Based Cognitive Radio Network for Enhancing the Network Coverage for Wireless Patient Monitoring System

The wireless Patient Monitoring System (PMS) is facing the issue of spectrum congestion. The 5G technology based wireless PMS is a promising solution. With the advancement in the wireless telecommunication technology from 4G to 5G, the important paradigm to be considered for the state of the art technique for the 5G/6G is the device to device (D2D) communication. One of the important issue associated with the advanced wireless communication technology is the network disconnection due to network blockage. Moreover, inefficient usage of the spectrum is the another major concern in wireless communication services. In this paper, by efficiently utilizing the unused spectrum the Cognitive Radio (CR) Relay assisted cooperative D2D communication has been aimed to enhance the network capacity (data rate) of the User Equipment (UE)/Licensed User (LU) which is in the network blockage area for wireless remote PMS. The CR enabled with Modified Whale Optimization Algorithm (MWOA) has been proposed for efficient spectrum sensing. The CR based relay technique for D2D communication with UE can significantly improve the performance of the network capacity without any investment on deploying new base stations. Simulation results exhibits that the performance of the network with MWOA-CR based relay technique has significantly improved.