New, Wee Kiat and Leow, Chee Yen and Navaie, Keivan and Sun, Yanshi and Ding, Zhiguo (2021) Downlink NOMA for Coexistence of Aerial and Terrestrial Users:Stochastic Geometry Analysis. In: 2020 IEEE Global Communications Conference, GLOBECOM 2020 - Proceedings. 2020 IEEE Global Communications Conference, GLOBECOM 2020 - Proceedings . Institute of Electrical and Electronics Engineers Inc., TWN. ISBN 9781728182988
Full text not available from this repository.Abstract
Connecting aerial users (AU)s to cellular networks expands the potential of many applications. Nevertheless, existing cellular networks are not designed to efficiently serve AUs and terrestrial users (TU)s. Limited spectrum and high interference make the task even more challenging. Thus, in this paper, we examine the feasibility of fixed-power non-orthogonal multiple access (NOMA) scheme in meeting the demands of AUs and TUs by leveraging stochastic geometry. To this end, we propose a tractable framework for evaluating the coverage of AU and TU in cellular networks, where BSs are distributed using Poisson Point Process (PPP). We then derive the coverage probability of AU and TU. Using these analytical expressions, we further analyze the impact of different network parameters such as AU's altitude, TU's distance, and power allocation, and obtain key insights for designing an efficient NOMA scheme. Our results show that i) increasing AU's altitude does not always degrade the signal-to-interference ratio (SIR), ii) fixed-power NOMA scheme cannot be employed solely to serve AU's control and command (C C) link, iii) pairing a near TU with a typical AU may prevent significant performance degradation, and iv) mitigating the interference of TU could improve the performance of AU.