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arXiv 2024年

作者： Liu, Wenshuai Fu, Yaru Shi, Zheng Wang, Hong The School of Science and Technology Hong Kong Metropolitan University 999077 Hong Kong The School of Intelligent Systems Science and Engineering Jinan University Zhuhai519070 China The Key Lab of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education Nanjing University of Posts and Telecommunications Nanjing210003 China

The convergence of digital twin technology and the emerging 6G network presents both challenges and numerous research opportunities. This article explores the potential synergies between digital twin and 6G, highlighting the key challenges and proposing fundamental principles for their integration. We discuss the unique requirements and capabilities of digital twin in the context of 6G networks, such as sustainable deployment, real-time synchronization, seamless migration, predictive analytic, and closed-loop control. Furthermore, we identify research opportunities for leveraging digital twin and artificial intelligence to enhance various aspects of 6G, including network optimization, resource allocation, security, and intelligent service provisioning. This article aims to stimulate further research and innovation at the intersection of digital twin and 6G, paving the way for transformative applications and services in the future. Copyright © 2024, The Authors. All rights reserved.

关键词： Resource allocation

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Social Awareness-Based Collaboration Interferes with Physical Layer Secure communication 13

Social Awareness-Based Collaboration Interferes with Physica...

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13th International Conference on wireless communications and Signal Processing, WCSP 2021

作者： Zhang, Teng Wei, Cun Wang, Jun Wang, Lei Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing210003 China Nanjing University of Posts and Telecommunications School of Geographic and Biologic Information Nanjing210003 China

ISBN: (纸本)9781665407854

This paper proposes a social-aware cooperative interference strategy for physical layer security, which not only considers the physical characteristics of the devices, but also considers the social relationship among users, and combines the two to increase the confidentiality capacity of the communication network. This paper studies the security issue of a multi-user communication network in the existence of eavesdropper and the source node with the help of cooperative interference node. To be specific, we define a trust value for each node to indicate the social relations and network interactivity between nodes. This paper proposes a two-layer network cooperative interference system model, by constructing the utility function of the main channel and the utility function of the eavesdropping channel, and the goal of maximizing the utility function of the entire network is proposed. The problem can be described as a one-to-one matching game, and the simulation results display that this scheme can obtain a higher confidentiality rate compared with the existing scheme. © 2021 IEEE.

关键词： Cooperative communication

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Compressed ghost imaging based on differential speckle patterns

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Chinese Physics B 2020年第2期29卷 294-300页

作者： Le Wang Shengmei Zhao Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications(NUPT)Nanjing 210003China Key Laboratory of Broadband Wireless Communication and Sensor Network Technology(NUPT) Ministry of EducationNanjing 210003China

We propose a compressed ghost imaging scheme based on differential speckle patterns,named *** the scheme,a series of bucket detector signals are acquired when a series of random speckle patterns are employed to illuminate an unknown *** the differential speckle patterns(differential bucket detector signals)are obtained by taking the difference between present random speckle patterns(present bucket detector signals)and previous random speckle patterns(previous bucket detector signals).Finally,the image of object can be obtained directly by performing the compressed sensing algorithm on the differential speckle patterns and differential bucket detector *** experimental and simulated results reveal that CGI-DSP can improve the imaging quality and reduce the number of measurements comparing with the traditional compressed ghost imaging schemes because our scheme can remove the environmental illuminations efficiently.

关键词： ghost imaging compressed sensing differential speckle patterns differential bucket detector signals

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Interference Source Location Based on Spaceborne Multi-beam Antenna 11th

Interference Source Location Based on Spaceborne Multi-beam ...

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11th EAI International Conference on wireless and Satellite Systems, WiSATS 2020

作者： Ruan, Cen Zhao, Laiding Zhang, Gengxin Xie, Jidong Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Nanjing210003 China "Telecommunication and Network" National Engineering Research Center Nanjing University of Posts and Telecommunications Nanjing210003 China

ISBN: (纸本)9783030690687

Based on the frequency division multiplexing principle of the multi-beam antenna, this paper proposes a new method for locating interference sources by only one single satellite. According to the antenna pattern function expression of multi-beam antennas, the positioning equations are derived and established by analyzing the link that interfering signal arrives at the spaceborne multi-beam antenna from the ground. Importantly, the gain error is introduced in the positioning process when we evaluate the performance of this positioning method. Considering the difficulty of solving nonlinear positioning equations, a new algorithm combining the Particle Swarm Optimization (PSO) and grid search is proposed. At the same time, in this paper, in order to analyze the feasibility of this new algorithm, we introduce the Monte Carlo method in the process of this experiment. Finally, this new algorithm is compared with the traditional Particle Swarm Optimization in terms of speed and accuracy, which shows the superiority of this new algorithm. © 2021, ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering.

关键词： Monte Carlo methods

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Task Classification Unloading Algorithm for Mobile Edge Computing in Smart Grid 5

Task Classification Unloading Algorithm for Mobile Edge Comp...

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5th IEEE Advanced Information technology, Electronic and Automation Control Conference, IAEAC 2021

作者： Xing, Ningzhe Wu, Peng Jin, Shen Yao, Jiming Xu, Zhichen State Grid Jibei Electric Power Co. Ltd Beijing China Nanjing University of Posts and Telecommunications Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Ministry of Education China

With the rapid development of smart grid, the data generated by grid services are growing rapidly, and the requirements for time delay are becoming more and more stringent. The storage and computing capacity of the existing terminal equipment can not meet the needs of high bandwidth and low delay of the system at the same time. Fortunately, mobile edge computing (MEC) can provide users with nearby storage and computing services at the network edge, this can give an option to simultaneously meet the requirement of high bandwidth and low delay. Aiming at the problem of service offload scheduling in edge computing, this paper proposes a delay optimized task offload algorithm based on task priority classification. Firstly, the priority of power grid services is divided by using analytic hierarchy process (AHP), and the processing efficiency and quality of service of emergency tasks are guaranteed by giving higher weight coefficients to delay constraints and security levels. Secondly, the service is initialized and unloaded according to the task preprocessing time. Finally, the reasonable subchannel allocation is carried out based on the task priority design decision method. Simulation results show that compared with the traditional approaches, our algorithm can effectively improve the overall system revenue and reduce the average user task delay. © 2021 IEEE.

关键词： computation offloading

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Optimal Power Allocation with Limited Feedback of Channel State Information in Multi-User MIMO Systems

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China communications 2020年第2期17卷 163-175页

作者： Kusi Ankrah Bonsu Weiwei Zhou Su Pan Yan Yan Key Lab Broadband Wireless Communication and Sensor Network Technology Ministry of EducationNanjing University of Posts and Telecommunications Nanjing 210003China Global Big Data Technologies Centre(GBDTC) University of Technology SydneySydney 2007Australia

In this paper,an expression for the user’s achievable data rate in the multi-user multiple-input multiple-output(MU-MIMO)system with limited feedback(LF)of channel state information(CSI)is *** energy efficiency(EE)is optimized through power allocation under quality of service(QoS)*** on mathematical equivalence and Lagrange multiplier approach,an energy-efficient unequal power allocation(EEUPA)with LF of CSI scheme is *** simulation results show that as the number of transmitting antennas increases,the EE also increases which is promising for the next generation wireless communication ***,it can be seen that the QoS requirement has an effect on the EE of the ***,the proposed EEUPA with LF of CSI algorithm performs better than the existing energy-efficient equal power allocation(EEEPA)with LF of CSI schemes.

关键词： energy efficiency unequal power allocation limited feedback MU-MIMO QoSguarantee and precoding

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One-decoy state reference-frame-independent quantum key distribution

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Chinese Physics B 2020年第7期29卷 246-250页

作者： Xiang Li Hua-Wei Yuan Chun-Mei Zhang Qin Wang Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China Broadband Wireless Communication and Sensor Network Technology Key Laboratory of Ministry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China

Reference-frame-independent quantum key distribution(RFI-QKD)has been proven to be very useful and practical under realistic ***,we present a scheme for one-decoy state RFI-QKD based on the work of Rusca et al.[***.112,171104(2018)],and carry out investigation on its performance under realistic experimental *** simulation results show that the one-decoy state RFI-QKD can achieve comparable performance in terms of secret key rate and transmission distance as the two-decoy state correspondence under practical experimental *** contrast,it does not need to prepare the vacuum state in the former case,substantially reducing the experimental complexity and random number ***,our present proposal seems very promising in practical implementations of RFI-QKD.

关键词： quantum key distribution RFI-QKD one decoy state

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Heart Rate Detection with the Off-the-Shelf Camera: Static to Non-Static 5

Heart Rate Detection with the Off-the-Shelf Camera: Static t...

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5th IEEE International Conference on Signal and Image Processing, ICSIP 2020

作者： Chen, Rui Chen, Jianxin Cheng, LiMing Huang, XiangJun Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and Telecommunications Ministry of Education Nanjing China

ISBN: (纸本)9781728168968

Imaging photo-plethysmography (IPPG) technique has been proven to detect heart rate (HR) with a camera. Currently it might be used in a rigid scenario, such as the static subject, the short measurement distance and good illumination. In this paper, we try to relax these constraints by extending the measurement distance and applying it to the non-static subject with IPPG technique using the off-the-shelf camera. To achieve it, the landmark detection method is used to locate the facial region of interest (ROI) for the subject during movements. On this ROI, R/G/B channel signals are extracted with the spatial average of pixels. Then we use a skin appearance model (CHROME) to remove the noise, and HR is estimated from the output of the CHROME through the power spectrum. Experimental results showed that our method works effectively in both static and non-static scenarios. In static scenario, the measurement distance can extend to 4 meters, while the accuracy can reach 86% compared with the results from a finger detection equipment. In non-static scenario, our method achieve better results than previous studies. © 2020 IEEE.

关键词： Cameras

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Resource Scheduling in URLLC and eMBB Coexistence Based on Dynamic Selection Numerology

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wireless communications and Mobile Computing 2024年第1期2024卷

作者： Wang, Lei Tao, Sijie Zhao, Lindong Zhou, Dengyou Liu, Zhe Sun, Yanbing School of Telecommunications and Information Engineering Nanjing University of Posts and Telecommunications Nanjing210003 China Key Lab. of Broadband Wireless Communication and Sensor Network Technology Ministry of Education Nanjing University of Posts and Telecommunications Nanjing210003 China School of Foreign Studies Jiangsu Open University Nanjing210036 China

This paper focuses on the resource allocation problem of multiplexing two different service scenarios, enhanced mobile broadband (eMBB) and ultrareliable low latency (URLLC) in 5G New Radio, based on dynamic numerology structure, mini-time slot scheduling, and puncturing to achieve optimal resource allocation. To obtain the optimal channel resource allocation under URLLC user constraints, this paper establishes a relevant channel model divided into two convex optimization problems: (a) eMBB resource allocation and (b) URLLC scheduling. We also determine the numerology values at the beginning of each time slot with the help of deep reinforcement learning to achieve flexible resource scheduling. The proposed algorithm is verified in simulation software, and the simulation results show that the dynamic selection of numerologies proposed in this paper can better improve the data transmission rate of eMBB users and reduce the latency of URLLC services compared with the fixed numerology scheme for the same URLLC packet arrival, while the reasonable resource allocation ensures the reliability of URLLC and eMBB communication. © 2024 Lei Wang et al.

关键词： Resource allocation

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Research on Functional Test of Mobile APP Based on Robot 5

Research on Functional Test of Mobile APP Based on Robot

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5th IEEE International Conference on Signal and Image Processing, ICSIP 2020

作者： Pan, Zhaolai Chen, Jianxin Yao, Ling Chen, ZhuAn Nanjing University of Posts and Telecommunications Ministry of Education Key Lab of Broadband Wireless Communication and Sensor Network Technology Nanjing China

ISBN: (纸本)9781728168968

With the rapid popularization of smartphones, various applications (Application: APP) have come into being. Therefore, automated testing of mobile applications is particularly important. At present, the automated testing on the market is often completed through test frameworks. However, when using the test framework we need to consider the compatibility of the mobile platform system. What's worse, accessing multiple apps at the same time has a bad impact on accuracy. In view of these problems, a robot-based automated test system for mobile applications is proposed. Firstly, a wireless projection technology is utilized to project the screen of a mobile device onto a computer screen. Then, the optical character recognition (OCR) algorithm and the normalized correlation matching algorithm are used to position the coordinates of the elements. Finally, the robot performs a click operation under control. The experimental results show that the system can achieve cross-platform testing, including automatically testing Chinese software or English software on Android and iOS platforms, and also has high accuracy and robustness. © 2020 IEEE.

关键词： Software testing

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