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We optimize the Age of Information (AoI) in mobile networks using the age-threshold slotted ALOHA (TSA) protocol. The network comprises multiple source-destination pairs, where each source sends a sequence of status update packets to its…

网络与互联网体系结构 · 计算机科学 2024-06-06 Fangming Zhao , Nikolaos Pappas , Chuan Ma , Xinghua Sun , Tony Q. S. Quek , Howard H. Yang

In practical cell-free (CF) massive multiple-input multiple-output (MIMO) networks with distributed and low-cost access points, the asynchronous arrival of signals at the user equipments increases multi-user interference that degrades the…

信息论 · 计算机科学 2022-12-07 Jiakang Zheng , Jiayi Zhang , Julian Cheng , Victor C. M. Leung , Derrick Wing Kwan Ng , Bo Ai

This paper considers a compressed-coding scheme that combines compressed sensing with forward error control coding. Approximate message passing (AMP) is used to decode the message. Based on the state evolution analysis of AMP, we derive the…

信息论 · 计算机科学 2024-10-30 Shansuo Liang , Chulong Liang , Junjie Ma , Li Ping

We examine the kinematic structure of Damped Lyman-alpha Systems (DLAs) in a series of cosmological hydrodynamic simulations using the AREPO code. We are able to match the distribution of velocity widths of associated low ionisation metal…

星系天体物理 · 物理学 2015-01-08 Simeon Bird , Martin Haehnelt , Marcel Neeleman , Shy Genel , Mark Vogelsberger , Lars Hernquist

With the rapid expansion of the Internet of Things, the efficient sharing of the wireless medium by a large amount of simple transmitters is becoming essential. Scheduling-based solutions are inefficient for this setting, where small data…

信息论 · 计算机科学 2022-02-18 Federico Clazzer , Alexandre Graell i Amat

We study the learnability of symbolic finite state automata (SFA), a model shown useful in many applications in software verification. The state-of-the-art literature on this topic follows the query learning paradigm, and so far all…

计算机科学中的逻辑 · 计算机科学 2024-02-14 Dana Fisman , Hadar Frenkel , Sandra Zilles

Motivated by applications in large-scale and multi-agent reinforcement learning, we study the non-asymptotic performance of stochastic approximation (SA) schemes with delayed updates under Markovian sampling. While the effect of delays has…

Federated learning enables collaborative model training across distributed data sources but suffers from slow convergence under non-IID data conditions. Existing solutions employ algorithmic modifications treating all client updates…

机器学习 · 计算机科学 2025-12-19 Jahidul Arafat

We introduce Mini Slotted Threshold ALOHA (MiSTA), a slotted ALOHA modification designed to minimize the network-wide time average Age of Information (AoI). In MiSTA, sources whose ages are below a certain threshold stay silent. When a node…

信息论 · 计算机科学 2021-11-16 Mutlu Ahmetoglu , Orhan Tahir Yavascan , Elif Uysal

Fast fluid antenna multiple access (FAMA) is an idea that promises to overcome severe interference in massive access scenarios by reconfiguring the antenna's position at the receiver side on a symbol-by-symbol basis, without the need of…

信号处理 · 电气工程与系统科学 2026-05-25 Noor Waqar , Kai-Kit Wong , Chan-Byoung Chae , Ross Murch

As 6G networks demand massive connectivity and stronger interference control, rate-splitting multiple access (RSMA) is attractive because it superposes a common stream and user-private streams and remains effective under imperfect CSIT and…

信号处理 · 电气工程与系统科学 2026-04-15 Jinyuan Liu , Yong Liang Guan , Tuo Wu , Kai-Kit Wong , Bruno Clerckx

LoRaWAN is one of the most promising standards for IoT applications. Nevertheless, the high density of end-devices expected for each gateway, the absence of an effective synchronization scheme between gateway and end-devices, challenge the…

网络与互联网体系结构 · 计算机科学 2018-09-17 Tommaso Polonelli , Davide Brunelli , Luca Benini

We study the Gaussian multiple access channel with random user activity, in the regime where the number of users is proportional to the code length. The receiver may know some statistics about the number of active users, but does not know…

信息论 · 计算机科学 2025-10-21 Xiaoqi Liu , Pablo Pascual Cobo , Ramji Venkataramanan

This paper presents an asymptotically compatible error bound for the finite element method (FEM) applied to a nonlocal diffusion model. The analysis covers two scenarios: meshes with and without shape regularity. For shape-regular meshes,…

数值分析 · 数学 2025-06-06 Yanzun Meng , Zuoqiang Shi

This paper introduces a novel sparse latent factor modeling framework using sparse asymptotic Principal Component Analysis (APCA) to analyze the co-movements of high-dimensional panel data over time. Unlike existing methods based on sparse…

统计方法学 · 统计学 2025-08-08 Zhaoxing Gao

Federated learning (FL) was recently proposed to securely train models with data held over multiple locations (``clients'') under the coordination of a central server. Prolonged training times caused by slow clients may hinder the…

机器学习 · 计算机科学 2025-10-07 Charikleia Iakovidou , Kibaek Kim

Continual test-time adaptation (CTTA) updates a pretrained model online on an unlabeled, non-stationary stream while anchoring it to a frozen source checkpoint. This anchor is useful only when the source remains reliable. On CCC-Hard,…

We quantify the throughput capacity of wireless multi-hop networks with several medium access schemes. We analyze pure ALOHA scheme where simultaneous transmitters are dispatched according to a uniform Poisson distribution and exclusion…

网络与互联网体系结构 · 计算机科学 2011-11-10 Salman Malik , Philippe Jacquet , Cedric Adjih

LoRaWAN is one of the most promising standards for long-range sensing applications. However, the high number of end devices expected in at-scale deployment, combined with the absence of an effective synchronization scheme, challenge the…

网络与互联网体系结构 · 计算机科学 2019-02-26 Tommaso Polonelli , Davide Brunelli , Achille Marzocchi , Luca Benini

Recent works have shown that foundational safe control methods, such as Hamilton-Jacobi (HJ) reachability analysis, can be applied in the latent space of world models. While this enables the synthesis of latent safety filters for…

机器人学 · 计算机科学 2025-09-25 Sankalp Agrawal , Junwon Seo , Kensuke Nakamura , Ran Tian , Andrea Bajcsy
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