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A non-orthogonal multiple access (NOMA) assisted semi-grant-free (SGF) framework is proposed to enable channel access for grant-free users (GFUs) by using residual resources from grant-based users. Under this framework, the problem of joint…

Signal Processing · Electrical Eng. & Systems 2025-08-18 Yuqin Liu , Mona Jaber , Yan Liu , Arumugam Nallanathan

There is a lack of research on the analysis of per-user traffic in cellular networks, for deriving and following traffic-aware network management. \textcolor{black}{In fact, the legacy design approach, in which resource provisioning and…

Systems and Control · Electrical Eng. & Systems 2021-11-03 Amin Azari , Fateme Salehi , Panagiotis Papapetrou , Cicek Cavdar

In this paper, an intelligent reflecting surface (IRS) is introduced to assist an unmanned aerial vehicle (UAV) communication system based on non-orthogonal multiple access (NOMA) for serving multiple ground users. We aim to minimize the…

Information Theory · Computer Science 2022-06-14 Yuanxin Cai , Zhiqiang Wei , Shaokang Hu , Chang Liu , Derrick Wing Kwan Ng , Jinhong Yuan

As augmented and virtual reality evolve, achieving seamless synchronization between physical and digital realms remains a critical challenge, especially for real-time applications where delays affect the user experience. This paper presents…

Networking and Internet Architecture · Computer Science 2025-10-30 Elif Ebru Ohri , Qi Liao , Anastasios Giovanidis , Francesca Fossati , Nour-El-Houda Yellas

In this paper, we consider that the unmanned aerial vehicles (UAVs) with attached intelligent reflecting surfaces (IRSs) play the role of flying reflectors that reflect the signal of users to the destination, and utilize the power-domain…

Signal Processing · Electrical Eng. & Systems 2021-11-09 Hussein M. Hariz , Saeed Sheikhzadeh , Nader Mokari , Mohammad R. Javan , B. Abbasi-Arand , Eduard A. Jorswieck

The age of information (AoI) is used to measure the freshness of the data. In IoT networks, the traditional resource management schemes rely on a message exchange between the devices and the base station (BS) before communication which…

Machine Learning · Computer Science 2024-01-26 Eslam Eldeeb , Mohammad Shehab , Hirley Alves

The high overhead of the beam training process is the main challenge when establishing mmWave communication links, especially for vehicle-to-everything (V2X) scenarios where the channels are highly dynamic. In this paper, we obtain prior…

Signal Processing · Electrical Eng. & Systems 2021-11-17 Yun Chen , Andrew Graff , Nuria González-Prelcic , Takayuki Shimizu

3GPP Release 18 cell discontinuous transmission and reception (cell DTX/DRX) is an important new network energy saving feature for 5G. As a time-domain technique, it periodically aggregates the user data transmissions in a given duration of…

Networking and Internet Architecture · Computer Science 2025-07-30 Wei Mao , Lili Wei , Omid Semiari , Shu-ping Yeh , Hosein Nikopour

This work proposes an energy-efficient, learning-based beamforming scheme for integrated sensing and communication (ISAC)-enabled V2X networks. Specifically, we first model the dynamic and uncertain nature of V2X environments as a Markov…

Signal Processing · Electrical Eng. & Systems 2025-08-28 Chen Shang , Jiadong Yu , Dinh Thai Hoang

In the realm of emerging real-time networked applications such as cyber-physical systems (CPS), the Age of Information (AoI) has emerged as a pivotal metric for evaluating timeliness. To meet the high computational demands, such as those in…

Machine Learning · Computer Science 2026-01-05 Lyudong Jin , Ming Tang , Jiayu Pan , Meng Zhang , Hao Wang

In this work, we adopt the emerging technology of mobile edge computing (MEC) in the Unmanned aerial vehicles (UAVs) for communication-computing systems, to optimize the age of information (AoI) in the network. We assume that tasks are…

Signal Processing · Electrical Eng. & Systems 2022-06-22 Marjan Tajik , Mohammadreza Maleki , Nader Mokari , Mohammad Reza Javan , Hamid Saeedi , Bile Peng , Eduard A. Jorswieck

Artificial intelligence (AI) is expected to significantly enhance radio resource management (RRM) in sixth-generation (6G) networks. However, the lack of explainability in complex deep learning (DL) models poses a challenge for practical…

Signal Processing · Electrical Eng. & Systems 2025-01-24 Nasir Khan , Asmaa Abdallah , Abdulkadir Celik , Ahmed M. Eltawil , Sinem Coleri

A novel framework is proposed for cellular offloading with the aid of multiple unmanned aerial vehicles (UAVs), while the non-orthogonal multiple access (NOMA) technique is employed at each UAV to further improve the spectrum efficiency of…

Machine Learning · Computer Science 2020-10-20 Ruikang Zhong , Xiao Liu , Yuanwei Liu , Yue Chen

The Version Age of Information (VAoI) quantifies information freshness by measuring the number of versions the receiver lags behind. This paper studies VAoI minimization in an $M$-user uplink non-orthogonal multiple access (NOMA) system…

Information Theory · Computer Science 2026-03-31 Gangadhar Karevvanavar , Rajshekhar V. Bhat , Nikolaos Pappas

The rapid advancement of Vehicle-to-Everything (V2X) communication is transforming Intelligent Transportation Systems (ITS), with 6G networks expected to provide ultra-reliable, low-latency, and high-capacity connectivity for Connected and…

Systems and Control · Electrical Eng. & Systems 2025-06-12 Donglin Wang , Anjie Qiu , Qiuheng Zhou , Hans D. Schotten

Unmanned aerial vehicle (UAV) has recently attracted a lot of attention as a candidate to meet the 6G ubiquitous connectivity demand and boost the resiliency of terrestrial networks. Thanks to the high spectral efficiency and low latency,…

Networking and Internet Architecture · Computer Science 2023-01-03 Ahmed Benfaid , Nadia Adem , Bassem Khalfi

We investigate the age of information (AoI) of a relay-assisted cooperative communication system, where a source node sends status update packets to the destination node as timely as possible with the aid of a relay node. For time-slotted…

Information Theory · Computer Science 2023-03-21 Haoyuan Pan , Jian Feng , Tse-Tin Chan , Victor C. M. Leung , Jianqiang Li

Semantic communication transmits the extracted features of information rather than raw data, significantly reducing redundancy, which is crucial for addressing spectrum and energy challenges in 6G networks. In this paper, we introduce…

Machine Learning · Computer Science 2025-05-27 Wenjun Zhang , Qiong Wu , Pingyi Fan , Kezhi Wang , Nan Cheng , Wen Chen , Khaled B. Letaief

There is a strong devotion in the automotive industry to be part of a wider progression towards the Fifth Generation (5G) era. In-vehicle integration costs between cellular and vehicle-to-vehicle networks using Dedicated Short Range…

Networking and Internet Architecture · Computer Science 2019-09-04 Lionel Nkenyereye , Lewis Nkenyereye , S M Riazul Islam , Yoon Ho Choi , Muhammad Bilal , Jong Wook Jan

This article investigates the non-orthogonal multiple access (NOMA) enhanced unmanned aerial vehicle (UAV)-to-Everything (U2X) frameworks. A novel 3-Dimension framework for providing wireless services to randomly roaming NOMA receivers…

Information Theory · Computer Science 2019-07-15 Tianwei Hou , Yuanwei Liu , Zhengyu Song , Xin Sun , Yue Chen