Power controlled outage-aware optimal protocol for NOMA-assisted underlay D2D networks

Underlay device-to-device (D2D) and non-orthogonal multiple access (NOMA) are two promising technologies that have potential to enhance the spectral efficiency for future wireless communication systems. This paper studies an underlay D2D-NOMA system in an uplink cellular network. Different from the...

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Bibliographic Details
Published in:International journal of electronics and communications 2022-12, Vol.157, p.154418, Article 154418
Main Authors: Jose, Justin, Agarwal, Anirudh, Krejcar, Ondrej, Bhatia, Vimal
Format: Article
Language:English
Subjects:
NOMA
Outage
Power allocation
Underlay D2D
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Summary:Underlay device-to-device (D2D) and non-orthogonal multiple access (NOMA) are two promising technologies that have potential to enhance the spectral efficiency for future wireless communication systems. This paper studies an underlay D2D-NOMA system in an uplink cellular network. Different from the previous works, we minimize the outage probability (OP) while allocating optimal power to the D2D group receivers. Specifically, a D2D power allocation (DPA) problem is formulated and a globally-optimal solution is obtained. As a special case, closed-form expressions are also derived for asymptotic OP-based DPA. Results are numerically validated, and an overall average performance improvement of at least 24% is observed over existing conventional power control schemes.
ISSN:1434-8411
1618-0399
DOI:10.1016/j.aeue.2022.154418