Next Generation Multiple Access for IMT Towards 2030 and Beyond

TL;DR

This paper discusses the development of next-generation multiple access techniques, focusing on non-orthogonal multiple access (NOMA), highlighting key features and future research directions for 2030 and beyond.

Contribution

It outlines three critical features of NOMA-assisted NGMA—multi-domain utilization, multi-mode compatibility, and multi-dimensional optimality—and discusses future research directions.

Findings

NOMA is a promising candidate for NGMA in 2030 frameworks.

Key features include multi-domain utilization, multi-mode compatibility, and multi-dimensional optimality.

Future research directions are identified for designing NOMA-assisted NGMA.

Abstract

Multiple access techniques are fundamental to the design of wireless communication systems, since many crucial components of such systems depend on the choice of the multiple access technique. Because of the importance of multiple access, there has been an ongoing quest during the past decade to develop next generation multiple access (NGMA). Among those potential candidates for NGMA, non-orthogonal multiple access (NOMA) has received significant attention from both the industrial and academic research communities, and has been highlighted in the recently published International Mobile Telecommunications (IMT)-2030 Framework. However, there is still no consensus in the research community about how exactly NOMA assisted NGMA should be designed. This perspective is to outline three important features of NOMA assisted NGMA, namely multi-domain utilization, multi-mode compatibility, and multi-dimensional optimality, where important directions for future research into the design of NOMA assisted NGMA are also discussed.