Impact of NOMA on Age of Information: A Grant-Free Transmission Perspective

Ding Z, Schober R, Poor HV (2023)

Publication Type: Journal article

Publication year: 2023

Journal

IEEE Transactions on Wireless Communications Institute of Electrical and Electronics Engineers (IEEE)

Pages Range: 1-1

DOI: 10.1109/TWC.2023.3313612

Abstract

The aim of this paper is to characterize the impact of non-orthogonal multiple access (NOMA) on the age of information (AoI) of grant-free transmission. In particular, a low-complexity form of NOMA, termed NOMA-assisted random access, is applied to grant-free transmission in order to illustrate the two benefits of NOMA for AoI reduction, namely increasing channel access and reducing user collisions. Closed-form analytical expressions for the time average AoI achieved by NOMA assisted grant-free transmission are obtained, and asymptotic studies are carried out to demonstrate that the use of the simplest form of NOMA is already sufficient to reduce the AoI of orthogonal multiple access (OMA) by more than 40%. In addition, the developed analytical expressions are also shown to be useful for optimizing the users’ transmission attempt probabilities, which are key parameters for grant-free transmission.

Authors with CRIS profile

Robert Schober Lehrstuhl für Digitale Übertragung

Involved external institutions

Khalifa University of Science, Technology & Research (KUSTAR) / جامعة خليفة AE United Arab Emirates (AE) Princeton University US United States (USA) (US)

How to cite

APA:

Ding, Z., Schober, R., & Poor, H.V. (2023). Impact of NOMA on Age of Information: A Grant-Free Transmission Perspective. IEEE Transactions on Wireless Communications, 1-1. https://dx.doi.org/10.1109/TWC.2023.3313612

MLA:

Ding, Zhiguo, Robert Schober, and H. Vincent Poor. "Impact of NOMA on Age of Information: A Grant-Free Transmission Perspective." IEEE Transactions on Wireless Communications (2023): 1-1.

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