Full Text:   <428>

CLC number: TN929.5

On-line Access: 2024-01-26

Received: 2023-03-01

Revision Accepted: 2024-01-26

Crosschecked: 2023-09-18

Cited: 0

Clicked: 671

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Danning XU

https://orcid.org/0009-0008-9989-3342

Xiao LI

https://orcid.org/0000-0001-9660-9053

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Frontiers of Information Technology & Electronic Engineering  2023 Vol.24 No.12 P.1717-1727

http://doi.org/10.1631/FITEE.2300136


Energy efficiency optimization for a RIS-assisted multi-cell communication system based on a practical RIS power consumption model


Author(s):  Danning XU, Yu HAN, Xiao LI, Jinghe WANG, Shi JIN

Affiliation(s):  National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Corresponding email(s):   220210746@seu.edu.cn, hanyu@seu.edu.cn, li_xiao@seu.edu.cn, wangjh@seu.edu.cn, jinshi@seu.edu.cn

Key Words:  Reconfigurable intelligent surface (RIS), Energy efficiency, Multi-cell communication system


Danning XU, Yu HAN, Xiao LI, Jinghe WANG, Shi JIN. Energy efficiency optimization for a RIS-assisted multi-cell communication system based on a practical RIS power consumption model[J]. Frontiers of Information Technology & Electronic Engineering, 2023, 24(12): 1717-1727.

@article{title="Energy efficiency optimization for a RIS-assisted multi-cell communication system based on a practical RIS power consumption model",
author="Danning XU, Yu HAN, Xiao LI, Jinghe WANG, Shi JIN",
journal="Frontiers of Information Technology & Electronic Engineering",
volume="24",
number="12",
pages="1717-1727",
year="2023",
publisher="Zhejiang University Press & Springer",
doi="10.1631/FITEE.2300136"
}

%0 Journal Article
%T Energy efficiency optimization for a RIS-assisted multi-cell communication system based on a practical RIS power consumption model
%A Danning XU
%A Yu HAN
%A Xiao LI
%A Jinghe WANG
%A Shi JIN
%J Frontiers of Information Technology & Electronic Engineering
%V 24
%N 12
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%@ 2095-9184
%D 2023
%I Zhejiang University Press & Springer
%DOI 10.1631/FITEE.2300136

TY - JOUR
T1 - Energy efficiency optimization for a RIS-assisted multi-cell communication system based on a practical RIS power consumption model
A1 - Danning XU
A1 - Yu HAN
A1 - Xiao LI
A1 - Jinghe WANG
A1 - Shi JIN
J0 - Frontiers of Information Technology & Electronic Engineering
VL - 24
IS - 12
SP - 1717
EP - 1727
%@ 2095-9184
Y1 - 2023
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/FITEE.2300136


Abstract: 
reconfigurable intelligent surface (RIS) is widely accepted as a potential technology to assist in communication between base stations (BSs) and users in edge areas. We study the energy efficiency of a RIS-assisted multi-cell communication system with a realistic RIS power consumption model. With the goal of maximizing the energy efficiency of the system, we optimize the transmit beamforming vectors at the BS and the RIS phase shift matrix by a proposed alternative optimization algorithm. First, the transmit beamforming vector is optimized by solving the transformed weighted minimum mean square error (WMMSE) problem. Subsequently, to solve the inconvenience incurred by the discrete relationship between the RIS reflecting unit power consumption and its discrete phase shift, we use a continuous function to approximate their relationship. With this approximation, we can use the majorization minimization (MM) technique to optimize the continuous RIS phase shifts, and then quantize the obtained phase shifts to discrete ones. Simulation results demonstrate that the energy efficiency of the system is effectively optimized by the proposed algorithm.

基于实际RIS功耗模型的RIS辅助多小区通信系统能量效率优化

许丹宁,韩瑜,李潇,王静赫,金石
东南大学移动通信全国重点实验室,中国南京市,210096
摘要:可重构智能超表面(RIS)是一种被广泛认可能够辅助基站与边缘用户之间通信的潜在技术。本文基于实际的RIS功耗模型,研究了RIS辅助多小区通信系统的能量效率。为了最大化系统的能量效率,提出一种交替优化算法,该算法联合优化了基站处的发射波束成形向量和RIS相移矩阵。首先,通过求解转换后的加权最小均方误差问题,对发射波束成形向量进行优化。随后,为解决RIS单元功耗与其离散相移之间的离散关系所导致的计算困难问题,使用一个连续函数来近似它们的关系。利用这种近似关系,采用优化最小化(MM)算法来优化连续的RIS相移,然后将得到的相移量化为离散相移。仿真结果表明,该算法有效提升了系统的能量效率。

关键词:可重构智能超表面;能量效率;多小区通信系统

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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