Stochastic Geometry Based Modeling and Analysis on Network NOMA in Downlink CoMP Systems

TL;DR

This paper models and analyzes the performance of network NOMA in downlink CoMP systems using stochastic geometry, deriving outage probabilities and demonstrating NOMA's advantages over OMA.

Contribution

It introduces a stochastic geometric framework for analyzing NOMA in CoMP systems and derives outage probabilities considering network interference.

Findings

N-NOMA outperforms OMA in CoMP systems.

Analytical outage probabilities match simulation results.

Stochastic geometry effectively models interference in NOMA CoMP.

Abstract

This paper investigates the performance of network non-orthogonal multiple access (N-NOMA) in a downlink coordinated multi-point (CoMP) system. In the considered N-NOMA scheme, multiple base stations (BSs) cooperatively serve a CoMP user, meanwhile, each BS serves additional NOMA users by occupying the same resource block allocated to the CoMP user. The locations of the BSs and users are modeled by stochastic geometric models and the interference from the whole network is considered. Through rigorous derivations, the outage probabilities achieved by the CoMP and NOMA users are obtained, respectively. Numerical results are provided to verify the accuracy of the analytical results and also demonstrate the superior performance of N-NOMA compared to orthogonal multiple access (OMA) based CoMP scheme.