Optimal RIS Partitioning and Power Control for Bidirectional NOMA Networks

Madi Makin; Sultangali Arzykulov; Abdulkadir Celik; Ahmed Eltawil; Galymzhan Nauryzbayev

doi:10.1109/twc.2023.3306048

Optimal RIS Partitioning and Power Control for Bidirectional NOMA Networks

Madi Makin, Sultangali Arzykulov, Abdulkadir Celik, Ahmed Eltawil, Galymzhan Nauryzbayev

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

8 Scopus citations

Abstract

This study delves into the capabilities of reconfigurable intelligent surfaces (RISs) in enhancing bidirectional non-orthogonal multiple access (NOMA) networks. The proposed approach partitions RIS to optimize the channel conditions for NOMA users, improving NOMA gain and eliminating the requirement for uplink (UL) power control. The proposed approach is rigorously evaluated under four practical operational regimes; 1) Quality-of-Service (QoS) sufficient regime, 2) RIS and power efficient regime, 3) max-min fair regime, and 4) maximum throughput regime, each subject to both UL and downlink (DL) QoS constraints. By leveraging decoupled nature of RIS portions and base station (BS) transmit power, closed-form solutions are derived to show how optimal RIS partitioning can meet UL-QoS requirements while optimal BS power control can ensure DL-QoS compliance. Analytical findings are validated by simulations, highlighting the significant benefits that RISs can bring to the NOMA networks in the aforementioned operational scenarios.

Original language	English (US)
Pages (from-to)	1-1
Number of pages	1
Journal	IEEE Transactions on Wireless Communications
DOIs	https://doi.org/10.1109/twc.2023.3306048
State	Published - Aug 23 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-09-07
Acknowledgements: This research was partially funded by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan (Grant No. AP13068122) and Nazarbayev University under Collaborative Research Program Grant no. 11022021CRP1513 (PI: Galymzhan Nauryzbayev).

ASJC Scopus subject areas

Applied Mathematics
Computer Science Applications
Electrical and Electronic Engineering

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10.1109/twc.2023.3306048

https://repository.kaust.edu.sa/bitstream/10754/690692/7/Optimal%20RIS%20Partitioning%20and%20Power%20Control%20for%20Bidirectional%20NOMA%20Networks.pdf

Cite this

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title = "Optimal RIS Partitioning and Power Control for Bidirectional NOMA Networks",

abstract = "This study delves into the capabilities of reconfigurable intelligent surfaces (RISs) in enhancing bidirectional non-orthogonal multiple access (NOMA) networks. The proposed approach partitions RIS to optimize the channel conditions for NOMA users, improving NOMA gain and eliminating the requirement for uplink (UL) power control. The proposed approach is rigorously evaluated under four practical operational regimes; 1) Quality-of-Service (QoS) sufficient regime, 2) RIS and power efficient regime, 3) max-min fair regime, and 4) maximum throughput regime, each subject to both UL and downlink (DL) QoS constraints. By leveraging decoupled nature of RIS portions and base station (BS) transmit power, closed-form solutions are derived to show how optimal RIS partitioning can meet UL-QoS requirements while optimal BS power control can ensure DL-QoS compliance. Analytical findings are validated by simulations, highlighting the significant benefits that RISs can bring to the NOMA networks in the aforementioned operational scenarios.",

author = "Madi Makin and Sultangali Arzykulov and Abdulkadir Celik and Ahmed Eltawil and Galymzhan Nauryzbayev",

note = "KAUST Repository Item: Exported on 2023-09-07 Acknowledgements: This research was partially funded by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan (Grant No. AP13068122) and Nazarbayev University under Collaborative Research Program Grant no. 11022021CRP1513 (PI: Galymzhan Nauryzbayev).",

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AU - Nauryzbayev, Galymzhan

N1 - KAUST Repository Item: Exported on 2023-09-07 Acknowledgements: This research was partially funded by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan (Grant No. AP13068122) and Nazarbayev University under Collaborative Research Program Grant no. 11022021CRP1513 (PI: Galymzhan Nauryzbayev).

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Optimal RIS Partitioning and Power Control for Bidirectional NOMA Networks

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