Performance of the NOMA user in FFR Millimeter Wave Networks

ABSTRACT

Non-Orthogonal Multiple Access (NOMA) and Fractional Frequency Reuse (FFR) were touted as two key techniques of the millimetre wave cellular system to derive spectrum efficiency and user performance improvement. By combining the NOMA and FFR techniques, this paper proposes a system to improve the performance of the NOMA user that utilises the NOMA-power domain technique to reuse an occupied Resource Block (RB). Besides following the power allocation policy of the NOMA technique, the resource allocation algorithm for the NOMA user is based on the FFR technique. Particularly, if the downlink Signal-to-Interference-plus-Noise ratio (SINR) of the NOMA user is greater than the threshold, it is allocated the Cell-Edge RB with a high interference level. Otherwise, it is served on the Cell-Center RB with a low interference level. The analytical and simulation results state that the proposed system can increase the coverage probability of the NOMA user up to 250%.

KEYWORDS:

• Non-Orthogonal multiple Access
• Fractional frequency reuse
• ultra dense network
• Nakagami-m
• coverage probability

Disclosure statement

No potential conflict of interest was reported by the author(s).

Notes

1. The density of $\lambda =3000$ $BS/k{m}^2$ is considered a low density of BSs in comparison with the massive machine type communications and 6 G which envision the deployment of ${10}^6-{10}^7$ devices in every $k{m}^2$ (Chafii et al., 2022).