To improve spectrum utilization for the fifth generation (5G) wireless networks using Non-orthogonal multiple access (NOMA) is new promising technique, useful technique for multiple access technology. In this project, the application of NOMA to multicast cognitive radio networks (MCR-NOMA) is studied. Where the multicast secondary users serve as relays to improve the performance of both primary and secondary networks. Based on the available channel state information (CSI), three different

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... ary user scheduling strategies for the cooperative MCR-NOMA scheme are conferred. To calculate the network performance, we derive the closed-form expressions of the outage probability and diversity order for both networks. Additionally, we introduce a new metric, referred to as mutual outage probability to characterize the cooperation benefit compared to non-cooperative MCR-NOMA scheme. Simulation results prove powerful achievement gains are obtained for both networks, with the of proposed cooperative MCR-NOMA scheme. It is also proved that higher spatial diversity order can be achieved by optimistically apply the CSI vacant for the secondary user is set. KEYWORDS: Non orthogonal multiple access (NOMA), multicast cognitive radio (MCR), 5G network, channel state information (CSI)