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Querying graph data with low latency is an important requirement in application domains such as social networks and knowledge graphs. Graph queries perform multiple hops between vertices. When data is partitioned and stored across multiple…

Databases · Computer Science 2022-12-21 Nathan Ng , Hung Le , Marco Serafini

This paper addresses decentralized stochastic gradient descent (D-SGD) over resource-constrained networks by introducing node-based and link-based scheduling strategies to enhance communication efficiency. In each iteration of the D-SGD…

Information Theory · Computer Science 2025-09-16 Jaiprakash Nagar , Zheng Chen , Marios Kountouris , Photios A. Stavrou

Decentralized Federated Learning (DFL) has emerged as a robust distributed paradigm that circumvents the single-point-of-failure and communication bottleneck risks of centralized architectures. However, a significant challenge arises as…

Machine Learning · Computer Science 2025-08-18 Lianshuai Guo , Zhongzheng Yuan , Xunkai Li , Yinlin Zhu , Meixia Qu , Wenyu Wang

In this paper, we consider a two-hop relay-assisted cognitive downlink OFDMA system (named as secondary system) dynamically accessing a spectrum licensed to a primary network, thereby improving the efficiency of spectrum usage. A…

Performance · Computer Science 2015-05-19 Rui Wang , Vincent K. N. Lau , Ying Cui

We consider the problem of minimizing the convergence time for decentralized federated learning (DFL) in wireless networks under broadcast communications, with focus on mixing matrix design. The mixing matrix is a critical hyperparameter…

Machine Learning · Computer Science 2026-04-20 Tuan Nguyen , Ting He

In this paper it is established that any jointly controllable, jointly observable, multi-channel, discrete or continuous time linear system with a strongly connected neighbor (communication) graph can be exponentially stabilized with any…

Systems and Control · Electrical Eng. & Systems 2022-12-02 Fengjiao Liu , Lili Wang , Daniel Fullmer , A. Stephen Morse

Federated learning has emerged as a privacy-preserving technique for collaborative model training across heterogeneously distributed silos. Yet, its reliance on a single central server introduces potential bottlenecks and risks of…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-06-13 Huong Nguyen , Hong-Tri Nguyen , Praveen Kumar Donta , Susanna Pirttikangas , Lauri Lovén

Distributed Hash Tables (DHTs) have been used in several applications, but most DHTs have opted to solve lookups with multiple hops, to minimize bandwidth costs while sacrificing lookup latency. This paper presents D1HT, an original DHT…

Distributed, Parallel, and Cluster Computing · Computer Science 2014-09-01 Luiz Monnerat , Claudio L. Amorim

Prediction of taxi service demand and supply is essential for improving customer's experience and provider's profit. Recently, graph neural networks (GNNs) have been shown promising for this application. This approach models city regions as…

Machine Learning · Computer Science 2023-04-07 Mahmoud Nazzal , Abdallah Khreishah , Joyoung Lee , Shaahin Angizi , Ala Al-Fuqaha , Mohsen Guizani

Graph learning is often a necessary step in processing or representing structured data, when the underlying graph is not given explicitly. Graph learning is generally performed centrally with a full knowledge of the graph signals, namely…

Signal Processing · Electrical Eng. & Systems 2021-12-14 Isabela Cunha Maia Nobre , Mireille El Gheche , Pascal Frossard

Several distributed system paradigms utilize Distributed Hash Tables (DHTs) to realize structured peer-to-peer (P2P) overlays. DHT structures arise as the most commonly used organizations for peers that can efficiently perform crucial…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-09-23 Yahya Hassanzadeh-Nazarabadi , Sanaz Taheri-Boshrooyeh , Safa Otoum , Seyhan Ucar , Öznur Özkasap

Large deep learning models have shown great potential for delivering exceptional results in various applications. However, the training process can be incredibly challenging due to the models' vast parameter sizes, often consisting of…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-04-14 Zhengqing Yuan , Huiwen Xue , Chao Zhang , Yongming Liu

Node representation learning in a network is an important machine learning technique for encoding relational information in a continuous vector space while preserving the inherent properties and structures of the network. Recently,…

Machine Learning · Computer Science 2023-05-16 Hogun Park , Jennifer Neville

Existing Graph Neural Networks (GNNs) follow the message-passing mechanism that conducts information interaction among nodes iteratively. While considerable progress has been made, such node interaction paradigms still have the following…

Machine Learning · Computer Science 2023-04-14 Jie Chen , Zilong Li , Yin Zhu , Junping Zhang , Jian Pu

Peer-to-peer (P2P) Data-sharing systems now generate a significant portion of Internet traffic. P2P systems have emerged as an accepted way to share enormous volumes of data. Needs for widely distributed information systems supporting…

Databases · Computer Science 2011-08-08 Anis Ismail , Mohamed Quafafou , Nicolas Durand , Mohammad Hajjar

With the magnitude of graph-structured data continually increasing, graph processing systems that can scale-out and scale-up are needed to handle extreme-scale datasets. While existing distributed out-of-core solutions have made it…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-01-19 Jiping Yu , Wei Qin , Xiaowei Zhu , Zhenbo Sun , Jianqiang Huang , Xiaohan Li , Wenguang Chen

We investigate the maintenance of overlay networks under massive churn, i.e. nodes joining and leaving the network. We assume an adversary that may churn a constant fraction $\alpha n$ of nodes over the course of $\mathcal{O}(\log n)$…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-02-09 Thorsten Götte , Vipin Ravindran Vijayalakshmi , Christian Scheideler

Communication scheduling aims to reduce communication bottlenecks in data parallel training (DP) by maximizing the overlap between computation and communication. However, existing schemes fall short due to three main issues: (1) hard data…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-03-24 Lin Meng , Yuzhong Sun

In decentralized optimization, nodes of a communication network each possess a local objective function, and communicate using gossip-based methods in order to minimize the average of these per-node functions. While synchronous algorithms…

Optimization and Control · Mathematics 2022-09-02 Mathieu Even , Hadrien Hendrikx , Laurent Massoulie

In wireless networks characterized by dense connectivity, the significant signaling overhead generated by distributed link scheduling algorithms can exacerbate issues like congestion, energy consumption, and radio footprint expansion. To…

Networking and Internet Architecture · Computer Science 2025-09-09 Zhongyuan Zhao , Gunjan Verma , Ananthram Swami , Santiago Segarra