Energy Efficiency Optimization for URLLC in RIS-Aided User-Centric Networks

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2024-11-20 DOI:10.1109/LCOMM.2024.3502716

Tao Luo;Hancheng Lu;Baolin Chong

引用次数: 0

Abstract

User-centric networking is expected to be a promising technology to implement ultra-reliable and low-latency communication (URLLC). However, the densely deployed access points (APs) in a user-centric network (UCN) will involve significant hardware costs and energy consumption. To address this issue, we propose a reconfigurable intelligent surface (RIS)-aided UCN for URLLC. Then, a joint optimization problem with consideration of active beamforming at APs and passive beamforming at RISs is formulated to achieve optimal energy efficiency (EE). Since the problem is intractable and non-convex, we develop an alternating optimization algorithm based on the inner approximation framework to solve it efficiently. Numerical results verify that the proposed algorithm outperforms baseline algorithms regarding EE. Particularly, with the proposed algorithm, our RIS-aided UCN achieves up to 147% performance gains in terms of EE compared to traditional UCN.

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ris辅助用户中心网络中URLLC的能效优化

以用户为中心的网络有望成为实现超可靠和低延迟通信（URLLC）的一种有前途的技术。然而，在以用户为中心的网络（UCN）中密集部署的接入点（ap）将涉及大量的硬件成本和能源消耗。为了解决这个问题，我们提出了一个可重构智能表面（RIS）辅助的URLLC UCN。在此基础上，提出了考虑APs处有源波束形成和RISs处无源波束形成的联合优化问题，以实现最优的能量效率（EE）。针对该问题的难解性和非凸性，提出了一种基于内逼近框架的交替优化算法。数值结果验证了该算法在EE方面优于基准算法。特别是，与传统UCN相比，我们的ris辅助UCN在EE方面实现了高达147%的性能提升。

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

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.