Reliability Enhancement for V2V Communications: via AF Relay Versus via Passive RIS

IF 8.3 2区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Transactions on Communications Pub Date : 2024-11-05 DOI:10.1109/TCOMM.2024.3492052

Momiao Zhou;Fan Wu;Kan Wang;Yanshi Sun;Lei Liu;Shahid Mumtaz;Mohsen Guizani;Dusit Niyato

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Abstract

In advanced vehicular networks, Roadside Unit (RSU)-based amplify-and-forward (AF) relay and passive Reconfigurable Intelligent Surface (RIS) are two potential helpers to enhance the vehicle-to-vehicle (V2V) communications when the direct link experiences poor quality. This paper presents a comprehensive comparison of the two enhancement modes from the outage performance perspective. In the presence of both direct link and enhanced link, the analytical expressions of the outage probability (OP) for the V2V communication under the two enhancement modes are derived respectively. Moreover, considering the co-channel interference caused by relay/RIS, the OP of the neighbouring vehicle-to-infrastructure (V2I) communication is also derived. Additional analysis compares the diversity order and the strength of interference created by the V2V communication under the two enhancement modes. Further discussions are presented on the effect of the channel estimation error and phase quantization error under the RIS mode. Finally, the pros and cons of the two enhancement modes are demonstrated by both the analytical and numerical results.

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增强 V2V 通信的可靠性：通过 AF 中继与通过无源 RIS

在先进的车辆网络中，当直接链路质量较差时，基于路边单元（RSU）的放大转发（AF）中继和无源可重构智能表面（RIS）是增强车对车（V2V）通信的两个潜在助手。本文从中断性能的角度对两种增强模式进行了全面比较。在直接链路和增强链路同时存在的情况下，分别推导了两种增强模式下V2V通信的中断概率（OP）的解析表达式。此外，考虑到中继/RIS引起的同信道干扰，推导了相邻车对基础设施（V2I）通信的OP。并对两种增强方式下V2V通信产生的分集顺序和干扰强度进行了比较。进一步讨论了在RIS模式下信道估计误差和相位量化误差的影响。最后，对两种增强方式的优缺点进行了分析和数值分析。

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 Transactions on Communications 工程技术-电信学

CiteScore

16.10

自引率

8.40%

发文量

528

审稿时长

4.1 months

期刊介绍： The IEEE Transactions on Communications is dedicated to publishing high-quality manuscripts that showcase advancements in the state-of-the-art of telecommunications. Our scope encompasses all aspects of telecommunications, including telephone, telegraphy, facsimile, and television, facilitated by electromagnetic propagation methods such as radio, wire, aerial, underground, coaxial, and submarine cables, as well as waveguides, communication satellites, and lasers. We cover telecommunications in various settings, including marine, aeronautical, space, and fixed station services, addressing topics such as repeaters, radio relaying, signal storage, regeneration, error detection and correction, multiplexing, carrier techniques, communication switching systems, data communications, and communication theory. Join us in advancing the field of telecommunications through groundbreaking research and innovation.