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A Game-Theoretic Perspective on Resource Management for Large-Scale UAV Communication Networks

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China Communications 2021年第1期18卷 70-87页

作者： Jiaxin Chen Ping Chen qihui wu Yuhua Xu Nan Qi Tao Fang Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information TechnologyCollege of Electronic and Information EngineeringNanjing University of Aeronautics and AstronauticsNanjing 211106China State Key Laboratory of Air Traffic Management System and Technology Nanjing 210014China th Research Institute of China Electronics Technology Group Corporation Nanjing 210007China College of Communications Engineering Army Engineering University of PLANanjing 210007China

As a result of rapid development in electronics and communication technology,large-scale unmanned aerial vehicles(UAVs)are harnessed for various promising applications in a coordinated *** it poses numerous advantages,resource management among various domains in large-scale UAV communication networks is the key challenge to be solved ***,due to the inherent requirements and future development trend,distributed resource management is *** this article,we investigate the resource management problem for large-scale UAV communication networks from game-theoretic perspective which are exactly coincident with the distributed and autonomous *** exploring the inherent features,the distinctive challenges are ***,we explore several gametheoretic models that not only combat the challenges but also have broad application *** provide the basics of each game-theoretic model and discuss the potential applications for resource management in large-scale UAV communication ***,mean-field game,graphical game,Stackelberg game,coalition game and potential game are *** that,we propose two innovative case studies to highlight the feasibility of such novel game-theoretic ***,we give some future research directions to shed light on future opportunities and applications.

关键词： large-scale UAV communication networks resource management game-theoretic model

Dynamic Spectrum Anti-Jamming with Distributed Learning and Transfer Learning

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China Communications 2023年第12期20卷 52-65页

作者： Xinyu Zhu Yang Huang Delong Liu qihui wu Xiaohu Ge Yuan Liu Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016China The 723 Institute of CSSC Yangzhou 225001China School of Electronic Information and Communications Huazhong University of Science and TechnologyWuhan 430074China School of Electronic and Information Engineering South China University of TechnologyGuangzhou 510641China

Physical-layer security issues in wireless systems have attracted great *** this paper,we investigate the spectrum anti-jamming(AJ)problem for data transmissions between *** fast-changing physical-layer jamming attacks in the time/frequency domain,frequency resources have to be configured for devices in advance with unknown jamming patterns(*** time-frequency distribution of the jamming signals)to avoid jamming signals emitted by malicious *** process can be formulated as a Markov decision process and solved by reinforcement learning(RL).Unfortunately,stateof-the-art RL methods may put pressure on the system which has limited computing *** a result,we propose a novel RL,by integrating the asynchronous advantage actor-critic(A3C)approach with the kernel method to learn a flexible frequency pre-configuration ***,in the presence of time-varying jamming patterns,the traditional AJ strategy can not adapt to the dynamic interference *** handle this issue,we design a kernelbased feature transfer learning method to adjust the structure of the policy function *** results reveal that our proposed approach can significantly outperform various baselines,in terms of the average normalized throughput and the convergence speed of policy learning.

关键词： A3C anti-jamming reinforcement learning spectrum transfer learning wireless system

Consensus-based decentralized clustering for cooperative spectrum sensing in cognitive radio networks

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Chinese Science Bulletin 2012年第28期57卷 3677-3683页

作者： wu qihui DING GuoRu WANG JinLong LI XiaoQiang HUANG YuZhen Institute of Communications Engineering PLA University of Science and TechnologyNanjing 210007China

A large number of previous works have demonstrated that cooperative spectrum sensing(CSS) among multiple users can greatly improve detection ***,when the number of secondary users(SUs;i.e.,spectrum sensors) is large,the sensing overheads(e.g.,time and energy consumption) will likely be intolerable if all SUs participate in *** this paper,we proposed a fully decentralized CSS scheme based on recent advances in consensus theory and unsupervised learning *** only on iteratively information exchanges among one-hop neighbors,the SUs with potentially best detection performance form a cluster in an ad hoc *** SUs take charge of CSS according to an average consensus protocol and other SUs outside the cluster simply overhear the sensing *** comparison,we also provide a decentralized implementation of the existing centralized optimal soft combination(OSC) *** results show that the proposed scheme has detection performance comparable to that of the OSC scheme and outperforms the equal gain combination scheme and location-awareness ***,compared with the OSC scheme,the proposed scheme significantly reduces the sensing overheads and does not require a priori knowledge of the local received signal-to-noise ratio at each SU.

关键词：位置感知产业集群全分散无线电网络频谱基础等增益合并检测性能

Optimal Deployment Density for Maximum Coverage of Drone Small Cells

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China Communications 2018年第5期15卷 25-40页

作者： Chao Dong Jiejie Xie Haipeng Dai qihui wu Zhen Qin Zhiyong Feng The College of Communication Engineering Army Engineering University of PLANanjing 210007China The Unit 31106 of PLA Nanjing 210007China The Department of Computer Science and Technology Nanjing UniversityNanjing 210093China The College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Beijing University of Posts and Telecommunications Beijing 100876China

With the proliferation of small and mini drones, Drone Small Cells(DSCs) can cooperative multiple drones to provide communication service for ground users as emergency means or supplementary ones of traditional terrestrial cellular networks. In this paper, we study the fundamental problem of optimizing the deployment density of DSCs to achieve the maximum coverage performance. Most related works do not consider cumulative inter-cell interference when studying the coverage performance of DSCs. First, we derive an approximate and closed-form expression of the cumulative inter-cell interference which comes from both probabilistic Line-of-Sight(Lo S) and Non-Line-of-Sight(NLo S) links. Then, we analyze the coverage performance of DSCs and derive the transcendental function of optimal deployment density to obtain the maximum coverage. Last, we propose an algorithm to get the optimal deployment density with low complexity. We conduct both field experiments and Matlab simulations to verify the correctness of theoretical analysis. In addition, we show the impact of some factors on the relation between the deployment density and coverage performance through extensive numerical simulations.

关键词： drone small cells deployment density coverage ratio inter-cell interference

Spatial-temporal spectrum hole discovery:a hybrid spectrum sensing and geolocation database framework

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Chinese Science Bulletin 2014年第16期59卷 1896-1902页

作者： Jinlong Wang Guoru Ding qihui wu Liang Shen Fei Song College of Communications Engineering PLA University of Science and Technology

A hybrid spectrum sensing and geolocation database framework is proposed to tackle the discovery of spatial-temporal spectrum hole in cognitive radio *** first analyze the advantages and disadvantages of spectrum sensing-based and geolocation database-based approaches respectively,which motivate us to further propose a hybrid protocol framework by effectively integrating the benefits of both spectrum sensing and geolocation ***,in the proposed hybrid approach,the goal is to maximize the utilization of spatialtemporal spectrum hole while satisfying the protection constraints for the primary *** and numerical results demonstrate the superior performance of the proposed hybrid approach over the existing spectrum sensing only and geolocation database only approaches,in terms of interference-free *** article serves as a fundamental framework for advancing the design of hybrid approaches for spatial-temporal spectrum hole discovery.

关键词：位置数据库地理定位混合协议频谱感知框架时空空洞

Hierarchical Cognition Cycle for Cognitive Radio Networks

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China Communications 2015年第1期12卷 108-121页

作者： WANG Jinlong FENG Shuo wu qihui ZHENG Xueqiang XU Yuhua College of Communications Engineering PLA University of Science and Technology

Cognitive radio(CR) can bring about remarkable improvement in spectrum *** cognition cycles have been proposed in recent ***,most of the existing works only emphasize functional or operational aspects of cognition cycle,regardless of other indispensable aspects and the connection between *** deal with the emerging situation of "data rich,information vague,knowledge poor" in cognitive radio networks(CRNs),we propose the hierarchical cognition cycle(HCC) as a new transdisciplinary research field in this *** investigates a fundamental problem,which is how to manage available resources in the complex environment to meet various demands in CRN.A comprehensive theoretical framework of HCC is established in terms of the core,the essence loop,the function loop,the operation loop,and the external loop of *** reduction of uncertainty in CRN is studied and several new metrics in HCC are ***,a few research challenges ahead are presented as well.

关键词： cognitive radio network hierarchical cognition cycle theoretical framework uncertainty research challenge

Guarding Legal Communication with Smart Jammer:Stackelberg Game Based Power Control Analysis

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China Communications 2021年第4期18卷 126-136页

作者： Zhe Su Nan Qi Yongjie Yan Zhiyong Du Jiaxin Chen Zhibin Feng qihui wu College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China State Key Laboratory of Air Traffic Management System and Technology Nanjing 210014China th Research Institute of China Electronics Technology Group Corporation Nanjing 210007China College of Information and Communication National University of Defense TechnologyChangsha 430010China College of Communications Engineering Army Engineering University of PLANanjing 210000China

This paper investigates a power control problem in a jamming system,where a separate smart jammer is deployed to ensure the communication security of the legal ***,due to power leakage,the smart jammer may incur unintentional interference to legal *** key is how to suppress illegal communication while limit the negative impact on legal user.A jamming counter measure Stackelberg game is formulated to model the jamming power control dynamic of the *** smart jammer acts as a leader to sense and interfere illegal communications of the illegal user,while the illegal user acts as a *** the game,the impact of uncertain channel information is taken into *** to whether illegal user considers the uncertain channel information,we investigate two scenarios,namely,illegal user can obtain statistical distribution and accurate information of interference channel gain and its own cost,*** work not only proposes a jamming counter measure iterative algorithm to update parameters,but also gives two solutions to obtain the Stackelberg equilibrium(SE).The power convergence behaviours under two scenarios are analyzed and ***,brute force is used to verify the accuracy of the SE value further.

关键词： power control jamming communication Received:Apr.13,2020 Revised:Sep.01,2020 Editor:Haifeng Zheng systems Stackelberg game

ERGODIC CAPACITY ANALYSIS FOR SIMO COGNITIVE FADING CHANNEL IN SPECTRUM SHARING ENVIRONMENT

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Journal of Electronics(China) 2010年第5期27卷 677-685页

作者： Yang Yang Wang Jinlong wu qihui Liu Xin Institute of Communication Engineering PLA University of Science and Technology Nanjing 210007China

In this paper,we consider the spectrum sharing Cognitive Radio(CR) system,wherein Single-Input Multi-Output(SIMO) cognitive fading channel is *** to the average in-terference constraint of primary user,the ergodic capacity of cognitive user involving joint beamforming and power control is *** derive the optimal joint beamforming and power control strategy and deduce the general integral expression for ergodic ***,under different channel fadings including Raleigh fading,Nakagami-m fading and Lognormal shadowing fading,the specific expressions of ergodic capacity for SIMO cognitive channel are *** of the expressions are presented in closed-form or with some special integral *** amount of simulations are conducted to corroborate our theoretical results.

关键词： Cognitive Radio (CR) Beamforming Power control Ergodic capacity Single-Input Multi-Output (SIMO)

A MULTI-CRC SELECTIVE HARQ SCHEME FOR MIMO SYSTEMS

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Journal of Electronics(China) 2008年第1期25卷 53-58页

作者： Song Fei Tong Xiaobing wu qihui Wang Jinlong Institute of Communications Engineering PLA University of Science and Technology Nanjing 210007 China

A multi-Cyclic Redundancy Check (CRC) selective Hybrid Automatic-Repeat-reQuest (HARQ) scheme for improving the throughput efficiency of Multiple Input Multiple Output (MIMO) systems is proposed in this paper. According to different feedback information from the receiver, the proposed HARQ scheme employs two strategies, referred to as retransmission frame selection and space diversity. These two strategies decrease the successive frame errors upon retransmission. Theoretic analysis and computer simulation results show that this HARQ scheme achieves higher throughput than the existing HARQ schemes even in poor conditions of low Signal-to-Noise Ratio (SNR).

关键词： Hybrid Automatic-Repeat-reQuest () Multiple Input Multiple Output (MIMO) Cyclic Redundancy Check (CRC) Space diversity