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Hybrid-Mode Multiple Access for UAV-BS Assisted Communications with UL-DL Rate Balancing

Zeng, H; Zhu, X; Jiang, Y; Wei, Z; Hao, Y; (2020) Hybrid-Mode Multiple Access for UAV-BS Assisted Communications with UL-DL Rate Balancing. In: Proceedings of the GLOBECOM 2020 IEEE Global Communications Conference. The Institute of Electrical and Electronics Engineers (IEEE): Taipei, Taiwan. Green open access

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Abstract

In this paper, we propose an unmanned aerial vehicle (UAV) base station (BS) assisted communication system for a special event (e.g., a football game) with heterogeneous traffic demands by all users and the uplink (UL)-downlink (DL) rate balancing requirement. With respect to UAV's high mobility, we propose a hybrid mode multiple access (HMMA) strategy where both orthogonal multiple access (OMA) and non-orthogonal multiple access (NOMA) techniques are utilized to meet heterogeneous traffic demands. Specifically, NOMA is utilized to achieve high average data rate, and OMA helps to meet the instantaneous rate demands of users. The proposed HMMA strategy has a high degree of freedom and provides superior minimum average rate across all users and a higher user fairness than the previous work with OMA only or NOMA only, where the instantaneous rate demands of users may not always be guaranteed during UAV's flight time due to dynamic channel changes, the inter-user interference and successive interference cancellation (SIC) error propagation. Furthermore, we investigate joint UL-DL optimization for a UAV assisted wireless system. Based on the channel reciprocity of the air-ground channels, an alternative algorithm is proposed to conduct joint UL-DL optimization of bandwidth assignment and UAV trajectory to accommodate heterogeneous rate demands across users and achieve quasi-balanced average rates in UL and DL.

Type: Proceedings paper
Title: Hybrid-Mode Multiple Access for UAV-BS Assisted Communications with UL-DL Rate Balancing
Event: LOBECOM 2020 EEE Global Communications Conference
ISBN-13: 978-1-7281-8298-8
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/GLOBECOM42002.2020.9322546
Publisher version: https://doi.org/10.1109/GLOBECOM42002.2020.9322546
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10123228
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