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In a real federated learning (FL) system, communication overhead for passing model parameters between the clients and the parameter server (PS) is often a bottleneck. Hierarchical federated learning (HFL) that poses multiple edge servers…

Machine Learning · Computer Science 2024-08-20 Xingrun Yan , Shiyuan Zuo , Rongfei Fan , Han Hu , Li Shen , Puning Zhao , Yong Luo

The emerging machine learning paradigm of decentralized federated learning (DFL) has the promise of greatly boosting the deployment of artificial intelligence (AI) by directly learning across distributed agents without centralized…

Machine Learning · Computer Science 2024-08-12 Yudi Huang , Tingyang Sun , Ting He

Transporting heavy or oversized slung loads using rotorcraft has traditionally relied on single-aircraft systems, which limits both payload capacity and control authority. Cooperative multilift using teams of rotorcraft offers a scalable…

Robotics · Computer Science 2026-03-06 Jack R. Pence , Jackson Fezell , Jack W. Langelaan , Junyi Geng

In a transmit preprocessing aided frequency division duplex (FDD) massive multi-user (MU) multiple-input multiple-output (MIMO) scheme assisted orthogonal frequency-division multiplexing (OFDM) system, it is required to feed back the…

Signal Processing · Electrical Eng. & Systems 2023-08-01 Pavan Kumar Gadamsetty , K. V. S. Hari , Lajos Hanzo

Edge caching can effectively reduce backhaul burden at core network and increase quality-ofservice at wireless edge nodes. However, the beneficial role of edge caching cannot be fully realized when the offloading link is in deep fade.…

Information Theory · Computer Science 2020-11-10 Yingyang Chen , Miaowen Wen , Ertugrul Basar , Yik-Chung Wu , Li Wang , Weiping Liu

The rapid growth of Internet of Things (IoT) devices has generated vast amounts of data, leading to the emergence of federated learning as a novel distributed machine learning paradigm. Federated learning enables model training at the edge,…

Signal Processing · Electrical Eng. & Systems 2023-11-03 Abdelaziz Salama , Achilleas Stergioulis , Syed Ali Zaidi , Des McLernon

This letter investigates computing-accessibility-aware cooperative 3D deployment of multiple UAVs for task completion enhancement, termed CA3D. We first provide a theoretical analysis showing that computing accessibility is the key…

Networking and Internet Architecture · Computer Science 2026-05-19 Yiqin Deng , Zihan Fang , Yijie Wang , Qingxiao Huang , Junhui Gao , Qianyao Ren , Yuguang Fang

The performance of centralized and distributed massive MIMO deployments are analyzed for indoor office scenarios. The distributed deployments use one of the following precoding methods: (1) local precoding with local channel state…

Information Theory · Computer Science 2018-01-11 Stefan Dierks , Gerhard Kramer , Berthold Panzner , Wolfgang Zirwas

Decentralized federated learning (DFL) is a variant of federated learning, where edge nodes only communicate with their one-hop neighbors to learn the optimal model. However, as information exchange is restricted in a range of one-hop in…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-10-11 Li Chen , Wei Liu , Yunfei Chen , Weidong Wang

Under the organization of the base station (BS), wireless federated learning (FL) enables collaborative model training among multiple devices. However, the BS is merely responsible for aggregating local updates during the training process,…

Information Theory · Computer Science 2023-10-05 Jingheng Zheng , Wanli Ni , Hui Tian , Deniz Gunduz , Tony Q. S. Quek , Zhu Han

Federated learning (FL) is a powerful distributed machine learning framework where a server aggregates models trained by different clients without accessing their private data. Hierarchical FL, with a client-edge-cloud aggregation…

Machine Learning · Computer Science 2023-01-10 Lumin Liu , Jun Zhang , Shenghui Song , Khaled B. Letaief

Deep Neural Networks (DNNs) have been widely applied in Internet of Things (IoT) systems for various tasks such as image classification and object detection. However, heavyweight DNN models can hardly be deployed on edge devices due to…

Machine Learning · Computer Science 2022-10-12 Tinghao Zhang , Zhijun Li , Yongrui Chen , Kwok-Yan Lam , Jun Zhao

Training at the edge utilizes continuously evolving data generated at different locations. Privacy concerns prohibit the co-location of this spatially as well as temporally distributed data, deeming it crucial to design training algorithms…

Machine Learning · Computer Science 2023-03-28 Sakshi Choudhary , Sai Aparna Aketi , Gobinda Saha , Kaushik Roy

Recently, deep neural networks (DNNs) have been widely applied in mobile intelligent applications. The inference for the DNNs is usually performed in the cloud. However, it leads to a large overhead of transmitting data via wireless…

Distributed, Parallel, and Cluster Computing · Computer Science 2018-12-19 Guangli Li , Lei Liu , Xueying Wang , Xiao Dong , Peng Zhao , Xiaobing Feng

This paper studies transmission strategies for the downlink of a cloud radio access network, in which the base stations are connected to a centralized cloud-computing based processor with digital fronthaul or backhaul links. We provide a…

Information Theory · Computer Science 2018-06-05 Pratik Patil , Binbin Dai , Wei Yu

Accurate indoor positioning for unmanned aerial vehicles (UAVs) is critical for logistics, surveillance, and emergency response applications, particularly in GPS-denied environments. Existing indoor localization methods, including optical…

Signal Processing · Electrical Eng. & Systems 2025-05-28 Cunyi Yin , Chenwei Wang , Jing Chen , Hao Jiang , Xiren Miao , Shaocong Zheng Zhenghua Chen Senior , Hong Yan

In this work, we propose an efficient method for channel state information (CSI) adaptive quantization and feedback in frequency division duplexing (FDD) systems. Existing works mainly focus on the implementation of autoencoder (AE) neural…

Signal Processing · Electrical Eng. & Systems 2025-09-05 Valentina Rizzello , Matteo Nerini , Michael Joham , Bruno Clerckx , Wolfgang Utschick

Channel state information (CSI)-based user equipment (UE) positioning with neural networks -- referred to as neural positioning -- is a promising approach for accurate off-device UE localization. Most existing methods train their neural…

Signal Processing · Electrical Eng. & Systems 2025-11-21 Till-Yannic Müller , Frederik Zumegen , Reinhard Wiesmayr , Emre Gönültaş , Christoph Studer

In the resource management of wireless networks, Federated Learning has been used to predict handovers. However, non-independent and identically distributed data degrade the accuracy performance of such predictions. To overcome the problem,…

Centralized coded caching and delivery is studied for a radio access combination network (RACN), whereby a set of $H$ edge nodes (ENs), connected to a cloud server via orthogonal fronthaul links with limited capacity, serve a total of $K$…

Information Theory · Computer Science 2019-10-01 Ahmed Roushdy , Abolfazl Seyed Motahari , Mohammed Nafie , Deniz Gunduz