NOMA-Assisted Grant-Free Transmission: How to Design Pre-Configured SNR Levels?

Zhiguo Ding; Robert Schober; H. Vincent Poor

doi:10.1109/LWC.2023.3330785

NOMA-Assisted Grant-Free Transmission: How to Design Pre-Configured SNR Levels?

Zhiguo Ding, Robert Schober, H. Vincent Poor

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The key idea of non-orthogonal multiple access (NOMA) assisted grant-free transmission is to create pre-configured receive signal-to-noise ratio (SNR) levels that can be used to serve users in a way similar to conventional bandwidth resources, such as time slots and subcarriers. In the literature, there exist two different SNR-level designs, and the aim of this letter is to investigate their impact on the performance of grant-free transmission, where age-of-information is adopted as the performance metric as it captures not only failures at the physical layer, such as outages and bit errors, but also errors caused by user collisions. The presented analytical and simulation results illustrate the performance gain achieved by NOMA over orthogonal multiple access, and also reveal the relative merits of the considered designs for pre-configured SNR levels.

Original language	British English
Pages (from-to)	412-416
Number of pages	5
Journal	IEEE Wireless Communications Letters
Volume	13
Issue number	2
DOIs	https://doi.org/10.1109/LWC.2023.3330785
State	Published - 1 Feb 2024

Keywords

age of information (AoI)
Grant-free transmission
non-orthogonal multiple access (NOMA)

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10.1109/LWC.2023.3330785

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title = "NOMA-Assisted Grant-Free Transmission: How to Design Pre-Configured SNR Levels?",

abstract = "The key idea of non-orthogonal multiple access (NOMA) assisted grant-free transmission is to create pre-configured receive signal-to-noise ratio (SNR) levels that can be used to serve users in a way similar to conventional bandwidth resources, such as time slots and subcarriers. In the literature, there exist two different SNR-level designs, and the aim of this letter is to investigate their impact on the performance of grant-free transmission, where age-of-information is adopted as the performance metric as it captures not only failures at the physical layer, such as outages and bit errors, but also errors caused by user collisions. The presented analytical and simulation results illustrate the performance gain achieved by NOMA over orthogonal multiple access, and also reveal the relative merits of the considered designs for pre-configured SNR levels.",

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NOMA-Assisted Grant-Free Transmission: How to Design Pre-Configured SNR Levels?

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