Title: Cache-aided MISO-NOMA concept

Authors: Natasa Paunkoska-Dimoska; Venceslav Kafedziski

Addresses: University of Information Science and Technology, Ohrid, North Macedonia ' Faculty of Electrical Engineering and Information Technologies, Skopje, North Macedonia

Abstract: Coded caching, non-orthogonal multiple access (NOMA), and massive multiple-input multiple-output (MIMO) are challenging and attractive technologies for rapidly emerging mobile networks, offering numerous significant advantages. The literature shows that a match between two diverse techniques outperforms the current existing benefits. This paper proposes a new joint scheme assuming cooperation between all three methods. Namely, a multiple-input single-output (MISO) base station equipped with multiple antennas serves a group of cached-aided end-users using the NOMA pairing approach to deliver requested files. Using MISO allows simultaneous transmissions; NOMA uses SIC (successive interference cancellation) to decode the signal consisting of more messages; coded caching speeds up the interference elimination and file decoding by applying CIC (cache-enabled interference cancellation). The zero-forcing method deals with inter-pair interference cancellation. This newly proposed concept improves the achievable sum rate for file delivery compared with other joint conventional constructions. Hence, simulation results show that the schemes using join CIC and SIC decoding processes exceed the sum-rate performance.

Keywords: coded caching; NOMA; non-orthogonal multiple access; MISO; multiple-input single-output; CIC; cache-enabled interference cancellation; SIC; successive interference cancellation.

DOI: 10.1504/IJWMC.2024.137869

International Journal of Wireless and Mobile Computing, 2024 Vol.26 No.3, pp.270 - 281

Received: 03 Nov 2022
Accepted: 11 Aug 2023
Published online: 05 Apr 2024 *

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