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arXiv 2025年

作者： Tong, Haonan Chen, Mingzhe Zhao, Jun Hu, Ye Yang, Zhaohui Liu, Yuchen Yin, Changchuan The Beijing Key Laboratory of Network System Architecture and Convergence The Beijing Advanced Information Network Laboratory Beijing University of Posts and Telecommunications Beijing China Singapore The Department of Electrical and Computer Engineering Frost Institute for Data Science and Computing University of Miami Coral GablesFL33146 United States The Department of Industrial and Systems Engineering University of Miami Coral GablesFL33146 United States The College of Information Science and Electronic Engineering Zhejiang University Zhejiang Hangzhou310027 China The Department of Computer Science North Carolina State University RaleighNC27695 United States The Beijing Key Laboratory of Network System Architecture and Convergence China The Beijing Advanced Information Network Laboratory Beijing University of Posts and Telecommunications Beijing100876 China

This article investigates the adaptive resource allocation scheme for digital twin (DT) synchronization optimization over dynamic wireless networks. In our considered model, a base station (BS) continuously collects factory physical object state data from wireless devices to build a real-time virtual DT system for factory event analysis. Due to continuous data transmission, maintaining DT synchronization must use extensive wireless resources. To address this issue, a subset of devices is selected to transmit their sensing data, and resource block (RB) allocation is optimized. This problem is formulated as a constrained Markov process (CMDP) problem that minimizes the long-term mismatch between the physical and virtual systems. To solve this CMDP, we first transform the problem into a dual problem that refines RB constraint impacts on device scheduling strategies. We then propose a continual reinforcement learning (CRL) algorithm to solve the dual problem. The CRL algorithm learns a stable policy across historical experiences for quick adaptation to dynamics in physical states and network capacity. Simulation results show that the CRL can adapt quickly to network capacity changes and reduce normalized root mean square error (NRMSE) between physical and virtual states by up to 55.2%, using the same RB number as traditional methods. © 2025, CC BY-NC-SA.

关键词： Markov processes

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Single-layer reflective metasurface for dual-band OAM multiplexing 4

Single-layer reflective metasurface for dual-band OAM multip...

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4th IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2021

作者： He, Xiaoyuan Deng, Li Feng, Botao Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China College of Electronics and Information Engineering Shenzhen University Shenzhen China

ISBN: (纸本)9781665432030

In this paper, a general scheme is proposed for dual-band orbital angular momentum (OAM) multiplexing based on a single-layer reflective geometric metasurface. As an OAM multiplexer, the proposed metasurface can distinguish different incidences featuring different incident angles, transform them into OAM waves with different topological charges (TCs) and control their reflection angle by modifying the k-space of the incidences simultaneously. In this way, the incidences can be combined into a coaxial beam without mutual interference because of the inherent orthogonality of different OAM modes. To achieve dual-band OAM multiplexing, a single-layer metal-insulator-metal (MIM) meta-atom that can independently impose arbitrary phase profiles on incidences at two different frequencies is designed. Based on it, a geometric metasurface is proposed for multiplexing OAM waves at 7 GHz and 14 GHz simultaneously. The simulated results show that eight independent data channels are created in a broadside beam when eight off-axis incidences carrying different information impinge on the proposed metasurface. This phenomenon indicates that the proposed metasurface can effectively achieve multiplexing by combining frequency and OAM domains to boost the channel capacity in wireless communications. © 2021 IEEE

关键词： Angular momentum

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A high-gain Yagi antenna for 5G-C band 4

A high-gain Yagi antenna for 5G-C band

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4th IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2021

作者： Li, Haoming Cao, Wenhua Feng, Botao Deng, Li College of Electronics and Information Engineering Shenzhen University Shenzhen518060 China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781665432030

In this work, a high-gain Yagi antenna for 5G-C band is proposed. The antenna is mainly made up of two parts: a printed folded dipole feeding source with a reflector plane and a director consisting of 21 equal directing units at regular intervals. Simulation results show that a bandwidth of 3.1 to 4.0 GHz is achieved. In addition, the antenna has good directional radiation characteristics. The boresight gain is larger than 14.6 dBi over the frequency band of 3.3-3.8 GHz. © 2021 IEEE

关键词： Microwave antennas

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A wideband vertically polarized omnidirectional antenna for indoor 2G/3G/LTE/5G applications 4

A wideband vertically polarized omnidirectional antenna for ...

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4th IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2021

作者： Liu, Zixuan Feng, Botao Deng, Li College of Electronics and Information Engineering Shenzhen University Shenzhen518060 China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781665432030

A wideband vertically polarized (VP) omnidirectional antenna is presented for the 2G/3G/LTE/5G communication systems in this work. The proposed antenna is composed of a ground plane, a center-fed discone with a dual-sleeve structure, and a top-loading circular patch that is printed with four U-slots and four arc-shaped slots. Here, the top circular patch is connected to the ground plane by using four shorting legs. The simulation results demonstrate that the proposed antenna achieves an enhanced impedance bandwidth of 0.68-4 GHz for |S11|≤-15 dB. Besides, it can radiate omnidirectionally in the horizontal plane, which can be widely applied in indoor distributed communication systems. ©2021 IEEE

关键词： Omnidirectional antennas

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A ±45°dual-polarized flat-topped radiation antenna array for 5G applications 4

A ±45°dual-polarized flat-topped radiation antenna array f...

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4th IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2021

作者： Li, Abiao Feng, Botao Deng, Li College of Electronics and Information Engineering Shenzhen University Shenzhen518060 China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781665432030

A ±45° dual-polarized planar antenna array with flat-topped radiation pattern is proposed. A bandwidth of 36.6% (2.9-4.2 GHz) with port isolation larger than 30 dB is achieved by using a pair of orthogonal T-shaped feeding lines to excite a pair of modified square-ring shaped dipoles. An array including 3×3 radiating elements has been designed and analyzed. By modifying the amplitude and the phase of each antenna element, a flat-topped radiation pattern that is suitable for the 5G applications is yielded. ©2021 IEEE

关键词： Antenna arrays

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Image Semantic Communications: An Extended Rate-Distortion Theory Based Scheme

Image Semantic Communications: An Extended Rate-Distortion T...

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IEEE Globecom Workshops

作者： Wanjie Tong Fangfang Liu Zhengfen Sun Yang Yang Caili Guo Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781665459761

Semantic communication is a promising paradigm for future artificial intelligence-empowered communications. In this paper, we propose a task-oriented semantic communications with semantic reconstruction (TOSC-SR) scheme for image semantic communications. Different from existing studies focusing on minimizing the pixel-level or feature-level distortion of images, TOSC-SR aims to preserve the semantic information of the image so as to ensure the performance of downstream artificial intelligence (AI) tasks. To this end, a new form of rate-distortion is first derived, which takes the semantic information related to AI tasks into consideration. We formulate TOSC-SR as an extended rate-distortion optimization problem. Then we propose a joint source and channel coding (JSCC) based semantic communication system, which are followed by multiple AI tasks. Experimental results show that the proposed approach outperforms the traditional JPEG, JPEG2000-based communication system and deep learning based multi-task communication system in terms of image reconstruction quality, AI task performance, and multi-task generalization ability.

关键词： Communication systems Semantics Rate-distortion Transform coding Multitasking Distortion Task analysis

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An Error Compensation Method of Time Synchronization for Cross-domain Interconnection in SD-TSN

An Error Compensation Method of Time Synchronization for Cro...

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Optical Fiber Communication (OFC) Conference

作者： Xiaodong Zhang Guochu Shou Junli Xue Hongxing Li Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China

We propose a time synchronization modeling and error compensation method for Software-Defined TSN. Experiments verify that the combination method of POE and NNPID can effectively improve time synchronization performan... 详细信息

ISBN: (纸本)9781557524669

关键词： Error compensation Artificial neural networks Optical fiber communication Synchronization

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Cost-effective Delay-bounded Topology Construction of Time-Sensitive networking for Industrial Internet Applications

Cost-effective Delay-bounded Topology Construction of Time-S...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Hao Ma Guochu Shou Junli Xue Yaqiong Liu Yihong Hu Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China

We propose a cost-effective delay-bounded topology construction method that expands local network via preferential attachment with delay constraint. The experiments show that the method is effective, and the node degr... 详细信息

关键词： network topology Asia Optical fiber networks Topology Delays Internet Photonics

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A dual-polarized omni-directional antenna for 2G/3G/LTE/5G-C band applications 4

A dual-polarized omni-directional antenna for 2G/3G/LTE/5G-C...

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4th IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2021

ISBN: (纸本)9781665432030

This paper proposes a dual-polarized omnidirectional antenna for 2G/3G/LTE/5G-C band applications. The antenna mainly consists of a vertically polarized (VP) element and a horizontally polarized (HP) element. The HP element is composed of four printed dipoles and a four-way power divider, whereas the VP element is made up of two copper pieces that are placed perpendicular to each other. Simulation results indicate that the overlapping bandwidth of the dual ports is 74.3%(1.65-3.60 GHz). In addition, the port isolation is larger than 20 dB and the gain variations are within 3 dB in both the VP and HP planes. © 2021 IEEE

关键词： Omnidirectional antennas

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Short-Term Wind Power Prediction Based on Cnn-Lstm-Xgboost

SSRN

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SSRN 2023年

作者： He, Qingsu Zhang, Xu Han, Qingzhi Sun, Yalu Zhao, Min Wu, Muqing Feng, Xiaowei Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing Beijing100876 China State Grid Gansu Electric Power Company Gansu Lanzhou730050 China

Short-term wind power forecasting can help power systems accurately predict future power supply situations, which is of great significance for promoting the development of power markets, facilitating the popularization and application of new energy sources, and accelerating energy transition and sustainable development. However, the influencing factors of wind power are highly random, volatile, and uncontrollable, as well as the nonlinearity and non-smoothness of the data, which is a great challenge for the prediction accuracy of wind power. To address the above problems, a short-term wind power forecasting approach based on mean Intrinsic Mode Functions (M-IMF), adaptive grouping wavelet packet decomposition (AG-WPD), cross-correlation attention mechanism Convolutional Neural networks (CCAM-CNN), and Long Short-Term Memory Neural network (LSTM) are proposed. Firstly, for the effect of different influence factors on wind power forecasting, a sample data organization method with the same power but different influence factor values is proposed. Then, an energy entropy feature extraction method based on the AG-WPD of M-IMF is used to enhance the diversity and expression ability of input features. In addition, to fully explore the inherent relationship between different features, a cross-correlation attention mechanism is proposed. In the end, a blended learning model based on CNN and LSTM is proposed to forecast wind power and the experimental results demonstrate that the proposed hybrid model has a significant advantage over other state-of-the-art models involved in this study in terms of prediction accuracy and stability. © 2023, The Authors. All rights reserved.

关键词： Long short-term memory

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