Need help in modeling in 5G network technology -- 3

I need help in utilizing performance in 5G network using one technology To enhance performance of the network using bandwidth and delay,, My projest is to study the performance of 5G networks capacity using different metrics such as spectrum efficiency, bandwidth and delay by exploiting the direct connection . We want to do cognitive on d2d with two types of d2d with analysis .The analysis is used both CSMA MAC protocols and Queueing system. Simulation results show that overlay communication with cognitive capability can improve the spectrum efficiency of network using matlab or simulation