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Reconfigurable intelligent surface (RIS)-aided wireless communications have drawn significant attention recently. We study the physical layer security of the downlink RIS-aided transmission framework for randomly located users in the…

Information Theory · Computer Science 2021-04-09 Jiayi Zhang , Hongyang Du , Qiang Sun , Bo Ai , Derrick Wing Kwan Ng

This paper develops a framework to study multi-hop relaying in a vehicular network consisting of vehicles and Road Side Units (RSUs), and the effect of this relaying on the network coverage and the communication delay. We use a stochastic…

Information Theory · Computer Science 2020-06-23 Hussein A. Ammar , Abdel-karim Ajami , Hassan Artail

This paper investigates a high-altitude platform (HAP) network enhanced with reconfigurable intelligent surfaces (RISs). The arbitrary placement of HAPs and RISs is modeled using stochastic geometry, specifically as homogeneous Poisson…

Signal Processing · Electrical Eng. & Systems 2024-11-07 Islam M. Tanash , Ayush Kumar Dwivedi , Taneli Riihonen

Multi-robot systems rely on underlying connectivity to ensure reliable communication and timely coordination. This paper studies the line-of-sight (LoS) connectivity maintenance problem in multi-robot navigation with unknown obstacles.…

Robotics · Computer Science 2026-03-30 Ruofei Bai , Shenghai Yuan , Xinhang Xu , Xingyu Ji , Xiaowei Li , Hongliang Guo , Wei-Yun Yau , Lihua Xie

This paper evaluates the geometrically averaged performance of a wireless communication network assisted by a multitude of distributed reconfigurable intelligent surfaces (RISs), where the RIS locations are randomly dropped obeying a…

Information Theory · Computer Science 2024-09-18 Jindan Xu , Wei Xu , Chau Yuen

Reconfigurable intelligent surface (RIS) has emerged as a cost- and energy-efficient solution to enhance the wireless communication capacity. However, recent studies show that a very large surface is required for a RIS-assisted…

Signal Processing · Electrical Eng. & Systems 2021-03-09 Nhan Thanh Nguyen , Quang-Doanh Vu , Kyungchun Lee , Markku Juntti

In this paper, we study the impact of reconfigurable intelligent surfaces (RISs) on the coverage extension of integrated access and backhaul (IAB) networks. Particularly, using a finite stochastic geometry model, with random distributions…

Information Theory · Computer Science 2025-02-18 Charitha Madapatha , Behrooz Makki , Hao Guo , Tommy Svensson

Given the necessity of connecting the unconnected, covering blind spots has emerged as a critical task in the next-generation wireless communication network. A direct solution involves obtaining a coverage manifold that visually showcases…

Networking and Internet Architecture · Computer Science 2023-12-12 Ruibo Wang , Washim Uddin Mondal , Mustafa A. Kishk , Vaneet Aggarwal , Mohamed-Slim Alouini

The reconfigurable intelligent surface (RIS) is one of the promising technologies contributing to the next generation smart radio environment. A novel physics-based RIS channel model is proposed. Particularly, we consider the RIS and the…

Signal Processing · Electrical Eng. & Systems 2020-08-04 Jiaqi Xu , Yuanwei Liu

The Random Geometric Graph (RGG) is a random graph model for network data with an underlying spatial representation. Geometry endows RGGs with a rich dependence structure and often leads to desirable properties of real-world networks such…

Social and Information Networks · Computer Science 2022-08-25 Quentin Duchemin , Yohann de Castro

Reconfigurable intelligent surface (RIS) is an emerging technique employing metasurface to reflect the signal from the source node to the destination node. By smartly reconfiguring the electromagnetic (EM) properties of the metasurface and…

Information Theory · Computer Science 2022-06-30 Qi Gu , Dan Wu , Xin Su , Hanning Wang , Jingyuan Cui , Yifei Yuan

In this paper, we utilize tools from stochastic geometry to estimate the interference propagation via reconfigurable intelligent surface (RIS) in the millimeter wave (mmWave, 30-300 GHz) band and specifically on the D band (110-170 GHz).…

Information Theory · Computer Science 2021-07-15 Joonas Kokkoniemi , Markku Juntti

This paper proposes a novel relay-aided intelligent reconfigurable surface (IRS) architecture for future wireless communication systems. The proposed architecture, which consists of two side-by-side intelligent surfaces connected via a…

Information Theory · Computer Science 2020-06-12 Xiaoyan Ying , Umut Demirhan , Ahmed Alkhateeb

In recent years, reconfigurable intelligent surfaces (RIS) have garnered significant attention for their ability to control the phase shifts in reflected signals. By intelligently adjusting these phases, RIS can establish seamless direct…

Networking and Internet Architecture · Computer Science 2024-12-17 Peini Yi , Wenchi Cheng , Jingqing Wang , Wei Zhang

Advancements in high-frequency communication technologies using millimeter waves (mmWave), Tera- Hertz (THz), and optical wireless frequency bands are key for extending wireless connectivity beyond 5G. These technologies offer a broader…

Optimization and Control · Mathematics 2025-07-30 Mohsen Abedi , Alexis A. Dowhuszko , Mehdi Sookhak , Risto Wichman

We consider the problem of signaling rate and performance for an efficient control and management of RIS reconfigurations and handover in next generation mobile networks. To this end, we first analytically determine the rates of RIS…

Networking and Internet Architecture · Computer Science 2024-07-26 Mounir Bensalem , Admela Jukan

Reconfigurable Intelligent Surfaces (RIS) are currently considered for adoption in future 6G stantards. ETSI and 3GPP have started feasibility and performance investigations of such a technology. This work proposes an analytical model to…

Networking and Internet Architecture · Computer Science 2024-08-06 Hamza Adrat , Laurent Decreusefond , Philippe Martins

Reconfigurable intelligent surfaces (RISs) enhance wireless communication by creating engineered signal reflection paths in addition to direct links. This work presents a stochastic geometry framework using point processes (PPs) to model…

Performance · Computer Science 2025-04-24 Guodong Sun , Francois Baccelli

The extra degrees of freedom resulting from the consideration of Reconfigurable Intelligent Surfaces (RISs) for smart signal propagation can be exploited for high accuracy localization and tracking. In this paper, capitalizing on a recent…

Information Theory · Computer Science 2022-03-01 George C. Alexandropoulos , Ioanna Vinieratou , Henk Wymeersch

The past year saw the introduction of new architectures such as Highway networks and Residual networks which, for the first time, enabled the training of feedforward networks with dozens to hundreds of layers using simple gradient descent.…

Neural and Evolutionary Computing · Computer Science 2017-03-16 Klaus Greff , Rupesh K. Srivastava , Jürgen Schmidhuber