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Semantic Communications:Theories,Technologies and Applications

中国通信（英文版） 2024年第7期21卷前插1-前插5页

作者： Zhang Ping Shi Guangming Cui Shuguang Zhang Zhaoyang Niu Kai Xiao Yong Qin Zhijin Dai Jincheng Shao Shuo Deniz Gündüz Eleonora Grassucci School of Information and Communication Engineering at Beijing University of Posts and Telecommunications State Key Laboratory of Networking and Switching Technology IMT-2020(5G)Experts Panel Experts Panel for China's 6G development Peng Cheng Laboratory School of Artifi-cial Intelligence Xidian University electrical and computer engineering with the University of Arizona Texas A&M University UC Davis Chinese Univer-sity of Hong Kong(Shenzhen)(CUHK-Shenzhen) Zhejiang University School of Artificial Intelli-gence BUPT School of Electron-ic Information and Communications at the Huazhong University of Science and Technology(HUST) WuhanChina Peng Cheng Laboratory Guang-zhouChina and the Pazhou Laboratory(Huangpu)Guang-zhouChina Tsinghua University BeijingChina Key Laboratory of Universal Wireless Communications Ministry of EducationBeijing University of Posts and Telecommunications School of Electronics Informa-tion and Electrical EngineeringShanghai Jiao Tong Univer-sityChina Information Processing in the Electrical and Electronic Engineering Department at Imperial College London UK Intelligent Systems and Networks Group Department at Imperial College London UK Department of Information Engineering Electronicsand Telecommunications of the Sapienza University of Rome

The last seventy years have witnessed the transi-tion of communication from Shannon's theoretical concept to current high-efficiency practical *** respect to Shannon information theory,to fulfill the high-bandwidth utilization,any further increase in the data rate requires a significant augmentation in the received signal power unless the bandwidth is extended in proportion to the incre-mental data rate.

关键词： Special issues and sections Semantics Communication systems Data processing Information theory Data augmentation

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Incorporating distributed DRL into storage resource optimization of space-air-ground integrated wireless communication network

arXiv

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arXiv 2022年

作者： Wang, Chao Liu, Lei Jiang, Chunxiao Wang, Shangguang Zhang, Peiying Shen, Shigen Qingdao266580 China State Key Laboratory of Integrated Services Networks Xidian University Xi'An710071 China Xidian Guangzhou Institute of Technology Guangzhou510555 China Beijing National Research Center for Information Science and Technology Tsinghua University Beijing100084 China Tsinghua Space Center Tsinghua University Beijing100084 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China Department of Computer Science and Engineering Shaoxing University Shaoxing312000 China

Space-air-ground integrated network (SAGIN) is a new type of wireless network mode. The effective management of SAGIN resources is a prerequisite for high-reliability communication. However, the storage capacity of space-air network segment is extremely limited. The air servers also do not have sufficient storage resources to centrally accommodate the information uploaded by each edge server. So the problem of how to coordinate the storage resources of SAGIN has arisen. This paper proposes a SAGIN storage resource management algorithm based on distributed deep reinforcement learning (DRL). The resource management process is modeled as a Markov decision model. In each edge physical domain, we extract the network attributes represented by storage resources for the agent to build a training environment, so as to realize the distributed training. In addition, we propose a SAGIN resource management framework based on distributed DRL. Simulation results show that the agent has an ideal training effect. Compared with other algorithms, the resource allocation revenue and user request acceptance rate of the proposed algorithm are increased by about 18.15% and 8.35% respectively. Besides, the proposed algorithm has good flexibility in dealing with the changes of resource conditions. Copyright © 2022, The Authors. All rights reserved.

关键词： Deep learning

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Off-body LOS and NLOS channel characterization in a mine environment

Off-body LOS and NLOS channel characterization in a mine env...

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International Conference on Electrical and Information Technologies (ICEIT)

作者： Moulay El Azhari Mourad Nedil Yassine Salih Alj Ismail Ben Mabrouk Khalida Ghanem Larbi Talbi Underground Communications Research Laboratory UQAT Val d'Or Canada Al Akhawayn University in Ifrane (AUI) Ifrane Morocco Sensor Networks and Cellular Systems (SNCS) Research Center University of Tabuk Tabuk Saudi Arabia Division Architecture des Systèmes Centre de développement des technologies avancées Algiers Algeria Department of Computer Science and Engineering University of Quebec in Outaouais (UQO) Canada

ISBN: (纸本)9781479974801

In this paper, the off-body performance of a single-input single-output (SISO) system was evaluated in Non-Line-of-Sight (NLOS) situations and compared with measurements done with a clear Line of Sight (LOS) link. The obstructed link study takes into account the human shadowing effect, usually caused by close by miners interrupting the transmitter-receiver link. Measurement campaigns were performed using Monopole antennas in an underground gold mine. The off-body channels were characterized in terms of the channel impulse response, RMS delay spread, and coherence bandwidth. The channel capacity was determined using the well-known Shannon formula for LOS and NLOS situations. The variation of the channel parameters in the different measurement scenarios was analyzed.

关键词： Delays Bandwidth Coherence Antenna measurements Loss measurement Channel capacity Shadow mapping

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Towards adoption of an optical second: Verifying optical clocks at the SI limit

arXiv

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arXiv 2018年

作者： McGrew, W.F. Zhang, X. Leopardi, H. Fasano, R.J. Nicolodi, D. Beloy, K. Yao, J. Sherman, J.A. Schäffer, S.A. Savory, J. Brown, R.C. Römisch, S. Oates, C.W. Parker, T.E. Fortier, T.M. Ludlow, A.D. National Institute of Standards and Technology 325 Broadway BoulderCO80305 United States Department of Physics University of Colorado BoulderCO80309 United States State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Quantum Electronics School of Electronics Engineering and Computer Science Peking University Beijing100871 China Niels Bohr Institute University of Copenhagen Blegdamsvej 17 Copenhagen2100 Denmark

The pursuit of ever more precise measures of time and frequency is likely to lead to the eventual redefinition of the second in terms of an optical atomic transition. To ensure continuity with the current definition, based on a microwave transition between hyperfine levels in ground-state133Cs, it is necessary to measure the absolute frequency of candidate standards, which is done by comparing against a primary cesium reference. A key verification of this process can be achieved by performing a loop closure—comparing frequency ratios derived from absolute frequency measurements against ratios determined from direct optical comparisons. We measure the1S0 →3P0 transition of171Yb by comparing the clock frequency to an international frequency standard with the aid of a maser ensemble serving as a flywheel oscillator. Our measurements consist of 79 separate runs spanning eight months, and we determine the absolute frequency to be 518 295 836 590 863.71(11) Hz, the uncertainty of which is equivalent to a fractional frequency of 2.1 × 10−16. This absolute frequency measurement, the most accurate reported for any transition, allows us to close the Cs-Yb-Sr-Cs frequency measurement loop at an uncertainty of −16, limited by the current realization of the SI second. We use these measurements to tighten the constraints on variation of the electron-to-proton mass ratio, µ = me/mp. Incorporating our measurements with the entire record of Yb and Sr absolute frequency measurements, we infer a coupling coefficient to gravitational potential of kµ = (−1.9 ± 9.4) × 10−7 and a drift with respect to time ofµµ = (5.3 ± 6.5) × 10−17/yr. Copyright © 2018, The Authors. All rights reserved.

关键词： Frequency standards

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Preface of the Symposium “Advanced engineering Systems and computer Applications: Theory and Practice”

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AIP Conference Proceedings 2017年第1期1906卷

作者： Mario Collotta Giovanni Pau Luca Di Persio Mauro De Marchis Barbara Milici 1)Computer and Networks Engineering Laboratory University of Enna Kore - Enna Italy 2)University of Verona Verona Italy 3)Environmental Hydraulic Laboratory University of Enna Kore - Enna Italy

Mario Collotta, Giovanni Pau, Luca Di Persio, Mauro De Marchis, Barbara Milici; Preface of the Symposium “Advanced engineering Systems and computer Applications

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Low-noise 750-MHz spaced Yb:fiber frequency combs

arXiv

引用

arXiv 2018年

作者： MA, YUXUAN XU, BO ISHII, HIROTAKA MENG, FEI NAKAJIMA, YOSHIAKI MATSUSHIMA, ISAO SCHIBLI, THOMAS R. ZHANG, ZHIGANG MINOSHIMA, KAORU 1-5-1 Chofugaoka Chofu Tokyo182-8585 Japan State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing100871 China Project 1-5-1 Chofugaoka Chofu Tokyo182-8585 Japan Department of Physics University of Colorado at Boulder 2000 Colorado Avenue BoulderCO80309-0390 United States

Growing interest of frequency combs is stimulating the development of high repetition rate combs. However, increasing the repetition rate to ∼GHz levels while maintaining tight phase locking to an optical reference w... 详细信息

关键词： Fibers

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RIFFLE: A Distributed Network Operating System with Re-configurability for Multiple Domains

RIFFLE: A Distributed Network Operating System with Re-confi...

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IEEE International Symposium on Parallel and Distributed Processing with Applications and IEEE International Conference on Ubiquitous Computing and Communications (ISPA/IUCC)

作者： Boyang Zhou Chunming Wu Shuangxi Chen Zhen Li Hong Fan Zhejiang Lab Intelligent Networks Institute Hangzhou China School of Intelligent Science and Technology Hangzhou Institute for Advanced Study UCAS Hangzhou China College of Computer Science and Technology Zhejiang University Hangzhou China Jiaxing Key Laboratory of Industrial Internet Jiaxing China Research Center for Intelligent Technology Standardization Zhejiang Lab Hangzhou China Department of Electrical Engineering Shanghai University of Electric Power Shanghai China

The distributed network control in software-defined networking is greatly challenged by the design demands of evolving a running distributed control plane (DCP), and by the complexity of handling the control state dynamics. In this paper, we propose RIFFLE to address the problem using a distributed network operating system approach. RIFFLE enables the evolvability of control states of DCP deployed on a global scale. RIFFLE handles spatial and temporal dynamics that occur when updating and migrating the distributed control states, which overcomes the critical barrier to the evolvability. It fills the gap by enabling temporal reconfigurability in DCP. Moreover, RIFFLE reduces the complexities of building and maintaining network control services in DCP by enabling componentization and abstracting the underlying network dynamics. We evaluated the prototype RIFFLE through experiments running in PlanetLab. The results show that the prototype scales well for 135 nodes. We also validate that RIFFLE ensures the continuity and low content request delay for the supported the information-centric network supported during cache update periods owing to the enabled evolvability.

关键词： Runtime Roads Decentralized control Information-centric networking Prototypes Ubiquitous computing Dynamic scheduling

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Implementing software based on relation frame theory to develop and increase relational cognitive skills

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AIP Conference Proceedings 2017年第1期1906卷

作者： Giovambattista Presti Concetta Messina Francesca Mongelli Maria Josè Sireci Mario Collotta 1Department of Human and Social Sciences Kore University Enna Italy 2Computer Engineering and Networks Laboratory Kore University Enna Italy

Relational Frame Theory is a post-skinnerian theory of language and cognition based on more than thirty years of basic and applied research. It defines language and cognitive skills as an operant repertoire of responses to arbitrarily related stimuli specific, as far as is now known, of the human species. RFT has been proved useful in addressing cognitive barriers to human action in psychotherapy and also improving children skills in reading, IQ testing, and in metaphoric and categorical repertoires. We present a frame of action where RFT can be used in programming software to help autistic children to develop cognitive skills within a developmental vision.

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Intelligent Multi-Modal Sensing-Communication Integration: Synesthesia of Machines

arXiv

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arXiv 2023年

作者： Cheng, Xiang Zhang, Haotian Zhang, Jianan Gao, Shijian Li, Sijiang Huang, Ziwei Bai, Lu Yang, Zonghui Zheng, Xinhu Yang, Liuqing The State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing100871 China The Samsung Semiconductor Samsung SoC Research and Development Lab San DiegoCA92121 United States Shandong University Jinan250100 China Guangzhou510000 China Guangzhou510000 China The Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong

In the era of sixth-generation (6G) wireless communications, integrated sensing and communications (ISAC) is recognized as a promising solution to upgrade the physical system by endowing wireless communications with sensing capability. Existing ISAC is mainly oriented to static scenarios with radio-frequency (RF) sensors being the primary participants, thus lacking a comprehensive environment feature characterization and facing a severe performance bottleneck in dynamic environments. To date, extensive surveys on ISAC have been conducted but are limited to summarizing RF-based radar sensing. Currently, some research efforts have been devoted to exploring multi-modal sensing-communication integration but still lack a comprehensive review. To fill the gap, we embark on an initial endeavor with the goal of establishing a unified framework of intelligent multi-modal sensing-communication integration by generalizing the concept of ISAC and providing a comprehensive review under this framework. Inspired by the human synesthesia, the so-termed Synesthesia of Machines (SoM) gives the clearest cognition of such an intelligent integration and details its paradigm for the first time. We commence by justifying the necessity and potential of the new paradigm. Subsequently, we offer a rigorous definition of SoM and zoom into the detailed paradigm, which is summarized as three operational modes realizing the integration. To facilitate SoM research, we overview the prerequisite of SoM research, that is, mixed multi-modal (MMM) datasets, and introduce our work. Built upon the MMM datasets, we introduce the mapping relationships between multi-modal sensing and communications, and discuss how channel modeling can be customized to support the exploration of such relationships. Afterward, aiming at giving a comprehensive survey on the current research status of multi-modal sensing-communication integration, we cover the technological review on SoM-enhance-based and SoM-concert-based app

关键词： Beamforming

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Risk Modeling and Traceability of Boundary Attacks on Internet of Power Systems Based on Complex networks

Risk Modeling and Traceability of Boundary Attacks on Intern...

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IEEE International Conference on Data Science in Cyberspace (DSC)

作者： Xin Li Zhaoyang Qu Tong Yu Ming Xie Fu Yu Wei Ding School of Electrical Engineering Northeast Electric Power University Jilin China People’s Bank of China Qinghai Provincial Branch Xining China China Southern Power Grid Guangxi Power Grid Co. Ltd. Research Institute Nanning China Bijie Power Supply Bureau China Guizhou Power Grid Co. Ltd. Bijie China Key Laboratory of Computing Power Network and Information Security Ministry of Education Shandong Computer Science Center (National Supercomputer Center in Jinan) Qilu University of Technology (Shandong Academy of Sciences) Jinan China Shandong Provincial Key Laboratory of Computer Networks Shandong Fundamental Research Center for Computer Science Jinan China

ISBN: (数字)9798350391367

ISBN: (纸本)9798350391374

With the increasing intelligence of power IoT terminal devices, the massive volume of data transmission, and the widespread adoption of shared services, traditional terminal boundary security mechanisms are unable to keep up with the rapid development of network technologies and applications. Additionally, they fail to trace and source network attacks, leading to frequent organized and purposeful malicious attack incidents. To address these issues, this paper proposes a research method for risk modeling and traceability of boundary attacks on power IoT terminals based on complex networks. First, based on the node information of power IoT terminal devices and complex network theory, a terminal boundary attack network (TBAN) is established. Next, using indicators related to complex network theory, such as degree, in-degree, and out-degree, the terminal boundary attack network is analyzed. Furthermore, a staged TBAN is proposed to analyze the attack risks at different times. Then, combining causal theory, a method for tracing and sourcing terminal boundary attacks based on a causal Bayesian network is proposed to identify and trace malicious attacks. Finally, validation and testing analysis are conducted using the actual deployment of power IoT terminal devices. The proposed analysis method transforms the spatial characteristics of the power IoT terminal boundary into a temporally sequential TBAN, which not only visually reflects attack risks but also reveals the temporal relationships of terminal boundary attacks between lines.

关键词： Complex networks Transforms Data science Data models Bayes methods Power systems Internet Security Data communication Testing

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