Fairness Index Analysis of NOMA Over OMA System for B5G Applications

Non-Orthogonal Multiple Access (NOMA) is one of the upsurging technologies for the Beyond 5G communication network that finds application in M2M, V2V, and connecting low-power IoT devices. NOMA exploits the multiplexing of signals in the power domain but with the same frequency. The conventional multiple access scheme is Orthogonal Multiple Access (OMA), whose performance is far less efficient when compared to NOMA. Fairness Index (FI) is one of the performance metrics that analyzes the quality of service offered by NOMA and OMA systems. In this paper, the Jain's Fairness Index (JFI) of the NOMA and OMA systems are analyzed with two users and then with more users. For the available bandwidth of 20 MHz with five users, the FI for NOMA is 0.9058, and that for OMA is 0.7087, ensuring the possibility of massive connections with the NOMA system.