Energy Efficiency Maximization in RIS-assisted Wireless Networks

The advancement in mobile technology has increased the demand for high data rates and quality of services in a wireless communication system. To fulfill the requirements for the 6G network, Reconfigurable Intelligent Surface (RIS) has been recommended as an efficient solution for increasing and improving the energy efficiency of wireless systems. RIS consists of different programmable passive components which are used to tune the wireless channel. We design the optimization problem concerning resource allocation, in which the target is to enhance and maximize the overall energy efficiency of the network. The constructed problem is an MINLP (Mixed Integer non-linear programable problem). In order to achieve results for the formulated problem, Outer Approximation Algorithm (OAA) is suggested in this article. The ν optimal solution is obtained using OAA. NOMAD is also put forward in our work for comparing the results obtained by using the proposed algorithm (OAA).