Robust sum rate maximization for active RIS-aided uplink NOMA communications with finite blocklength transmission

IF 5.9 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Ain Shams Engineering Journal Pub Date : 2025-10-06 DOI:10.1016/j.asej.2025.103772

Changqing Ye , Hong Jiang , Chenping Zeng , Haoxin Shi , Longke He

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引用次数: 0

Abstract

This paper introduces an innovative framework integrating active reconfigurable intelligent surfaces (RIS) with non-orthogonal multiple access (NOMA) for uplink multiuser secure communication networks. The proposed scheme aims to simultaneously mitigate the threats of potential eavesdropping (PEs) and guarantee that legitimate users (LUs) satisfy ultra-reliable and low-latency communication (URLLC) requirements under finite blocklength (FBL) constraints. With a norm-bounded channel state information (CSI) uncertainty model, we formulate a sum rate maximization problem subject to FBL transmission constraints on reliability and latency, maximum tolerable information leakage to PEs, and system resource constraints. The problem is challenging due to infinite-dimensional constraints and strong variable coupling. To address these challenges, an alternating optimization (AO) algorithm is developed to jointly optimize LU power allocation, base station (BS) beamforming, and active RIS beamforming. Convergence and complexity analyses are provided. Simulations verify that active RIS with NOMA improves security, robustness, and efficiency while better meeting URLLC requirements.

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有限块长有源ris辅助上行NOMA通信的鲁棒和速率最大化

介绍了一种集成有源可重构智能面（RIS）和非正交多址（NOMA）的创新框架，用于上行多用户安全通信网络。提出的方案旨在同时减轻潜在窃听（PEs）的威胁，并保证合法用户（lu）在有限块长度（FBL）约束下满足超可靠和低延迟通信（URLLC）要求。利用范数有界信道状态信息（CSI）不确定性模型，在FBL传输可靠性和延迟约束、pe最大可容忍信息泄漏约束和系统资源约束下，提出了一个和速率最大化问题。由于无限维约束和强变量耦合，该问题具有挑战性。为了解决这些挑战，开发了一种交替优化（AO）算法来联合优化低功耗功率分配、基站（BS）波束形成和有源RIS波束形成。给出了收敛性和复杂性分析。仿真验证了采用NOMA的主动RIS在更好地满足URLLC需求的同时，提高了安全性、鲁棒性和效率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ain Shams Engineering Journal Engineering-General Engineering

CiteScore

10.80

自引率

13.30%

发文量

441

审稿时长

49 weeks

期刊介绍： in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.