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Low Earth orbit (LEO) satellite constellations are rapidly becoming essential enablers of next-generation wireless systems, offering global broadband access, high-precision localization, and reliable sensing beyond terrestrial coverage.…

Federated learning (FL) enables collaborative model training across distributed nodes without exposing raw data, but its decentralized nature makes it vulnerable in trust-deficient environments. Inference attacks may recover sensitive…

Machine Learning · Computer Science 2025-11-04 Guanjie Cheng , Mengzhen Yang , Xinkui Zhao , Shuyi Yu , Tianyu Du , Yangyang Wu , Mengying Zhu , Shuiguang Deng

Low earth orbit (LEO) satellite internet of things (IoT) is a promising way achieving global Internet of Everything, and thus has been widely recognized as an important component of sixth-generation (6G) wireless networks. Yet, due to…

Information Theory · Computer Science 2024-05-28 Ming Ying , Xiaoming Chen , Qiao Qi , Wolfgang Gerstacker

Integrating contention-based random access procedures into low Earth orbit (LEO) satellite communication (SatCom) systems poses new challenges, including long propagation delays, large Doppler shifts, and a large number of simultaneous…

Signal Processing · Electrical Eng. & Systems 2026-01-27 Hyunwoo Lee , Ian P. Roberts , Jinkyo Jeong , Daesik Hong

Federated learning (FL), as a distributed machine learning paradigm, promotes personal privacy by local data processing at each client. However, relying on a centralized server for model aggregation, standard FL is vulnerable to server…

Machine Learning · Computer Science 2021-08-31 Jun Li , Yumeng Shao , Kang Wei , Ming Ding , Chuan Ma , Long Shi , Zhu Han , H. Vincent Poor

In this paper, we investigate the performance of large-scale heterogeneous low Earth orbit (LEO) satellite networks in the context of three association schemes. In contrast to existing studies, where single-tier LEO satellite-based network…

Emerging Technologies · Computer Science 2024-05-14 Yuan Guo , Christodoulos Skouroumounis , Symeon Chatzinotas , Ioannis Krikidis

Dynamic spectrum sharing (DSS) between satellite and terrestrial networks has increasingly engaged the academic and industrial sectors. Nevertheless, facilitating secure, efficient and scalable sharing continues to pose a pivotal challenge.…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-08-06 Zixin Wang , Mingrui Cao , Hao Jiang , Bin Cao , Shuo Wang , Chen Sun , Mugen Peng

The complexities of healthcare data, including privacy concerns, imbalanced datasets, and interoperability issues, necessitate innovative machine learning solutions. Swarm Learning (SL), a decentralized alternative to Federated Learning,…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-04-24 Yanjie Wu , Yuhao Ji , Saiho Lee , Juniad Akram , Ali Braytee , Ali Anaissi

Despite the great potential of Federated Learning (FL) in large-scale distributed learning, the current system is still subject to several privacy issues due to the fact that local models trained by clients are exposed to the central…

Cryptography and Security · Computer Science 2022-05-12 Truc Nguyen , Phuc Thai , Tre' R. Jeter , Thang N. Dinh , My T. Thai

Unmanned aerial vehicle (UAV) networks are increasingly deployed for complex missions, including disaster response, intelligent logistics, and environmental monitoring. These missions generally require coordinated collaboration among…

Cryptography and Security · Computer Science 2026-03-03 Yao Wu , Ziye Jia , Jingjing Zhao , Haoyang Wang , Qihui Wu , Zhu Han

With the increasing importance of machine learning, the privacy and security of training data have become critical. Federated learning, which stores data in distributed nodes and shares only model parameters, has gained significant…

Machine Learning · Computer Science 2025-07-10 Yang Li , Chunhe Xia , Chang Li , Tianbo Wang

Federated learning (FL) is a promising way to allow multiple data owners (clients) to collaboratively train machine learning models without compromising data privacy. Yet, existing FL solutions usually rely on a centralized aggregator for…

Cryptography and Security · Computer Science 2022-11-09 Nanqing Dong , Jiahao Sun , Zhipeng Wang , Shuoying Zhang , Shuhao Zheng

Low earth orbit (LEO) satellite plays an indispensable role in the earth network because of its low latency, large capacity, and seamless global coverage. For such an unprecedented extensive irregular system, stochastic geometry (SG) is a…

Information Theory · Computer Science 2021-10-26 Ruibo Wang , Mustafa A. Kishk , Mohamed-Slim Alouini

Low Earth Orbit Satellite Networks (LSNs) are integral to supporting a broad range of modern applications, which are typically modeled as Service Function Chains (SFCs). Each SFC is composed of Virtual Network Functions (VNFs), where each…

Information Theory · Computer Science 2024-09-10 Khai Doan , Marios Avgeris , Aris Leivadeas , Ioannis Lambadaris , Wonjae Shin

Federated learning (FL) has emerged as a promising distributed training paradigm for Low Earth Orbit (LEO) networks by significantly reducing communication overhead. However, its deployment faces critical challenges, e.g., topology-induced…

Signal Processing · Electrical Eng. & Systems 2026-05-07 Jinhao Yi , Weijun Gao , Chong Han , Ozgur Gurbuz , Josep M. Jornet

Mobile edge computing (MEC) has been envisioned as a promising paradigm to handle the massive volume of data generated from ubiquitous mobile devices for enabling intelligent services with the help of artificial intelligence (AI).…

Cryptography and Security · Computer Science 2021-04-06 Dinh C. Nguyen , Ming Ding , Quoc-Viet Pham , Pubudu N. Pathirana , Long Bao Le , Aruna Seneviratne , Jun Li , Dusit Niyato , H. Vincent Poor

Federated Learning (FL) addresses the challenges posed by data silos, which arise from privacy, security regulations, and ownership concerns. Despite these barriers, FL enables these isolated data repositories to participate in…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-08-15 Linshan Jiang , Moming Duan , Bingsheng He , Yulin Sun , Peishen Yan , Yang Hua , Tao Song

The regenerative capabilities of next-generation satellite systems offer a novel approach to design low earth orbit (LEO) satellite communication systems, enabling full flexibility in bandwidth and spot beam management, power control, and…

Information Theory · Computer Science 2023-12-19 Sovit Bhandari , Thang X. Vu , Symeon Chatzinotas

For the modern world where data is becoming one of the most valuable assets, robust data privacy policies rooted in the fundamental infrastructure of networks and applications are becoming an even bigger necessity to secure sensitive user…

Cryptography and Security · Computer Science 2019-12-11 Anudit Nagar

Since the traffic conditions change over time, machine learning models that predict traffic flows must be updated continuously and efficiently in smart public transportation. Federated learning (FL) is a distributed machine learning scheme…

Machine Learning · Computer Science 2022-12-27 Chenhao Xu , Youyang Qu , Tom H. Luan , Peter W. Eklund , Yong Xiang , Longxiang Gao