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A hierarchical blockchain-enabled security-threat assessment architecture for IoV

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Digital Communications and Networks 2024年第4期10卷 1035-1047页

作者： Yuanni Liu Ling Pan shanzhi chen School of Cyber Security and Information Law Chongqing University of Posts and TelecommunicationsChongqing400065China State Key Laboratory of Wireless Mobile Communications China Academy of Telecommunication TechnologyBeijing100191China

In Internet of Vehicles(IoV),the security-threat information of various traffic elements can be exploited by hackers to attack vehicles,resulting in accidents,privacy ***,it is necessary to establish security-threat assessment architectures to evaluate risks of traffic elements by managing and sharing securitythreat ***,most assessment architectures process data in a centralized manner,causing delays in query *** address this issue,in this paper,a Hierarchical Blockchain-enabled Security threat Assessment Architecture(HBSAA)is proposed,utilizing edge chains and global chains to share *** addition,data virtualization technology is introduced to manage multi-source heterogeneous data,and a metadata association model based on attribute graph is designed to deal with complex data *** order to provide high-speed query service,the ant colony optimization of key nodes is designed,and the HBSAA prototype is also developed and the performance is *** results on the large-scale vulnerabilities data gathered from NVD demonstrate that the HBSAA not only shields data heterogeneity,but also reduces service response time.

关键词： Internet of vehicles Blockchain Edge computing Data virtualization Data service composition

System Integration of Terrestrial Mobile Communication and Satellite Communication——The Trends, Challenges and Key Technologies in B5G and 6G

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China Communications 2020年第12期17卷 156-171页

作者： shanzhi chen Shaohui Sun Shaoli Kang State Key Laboratory of Wireless Mobile Communications China Academy of Telecommunication TechnologyBeijing 100191China

Mobile communication standards have been developed into a new era of B5G and *** recent years,low earth orbit(LEO)satellites and space Internet have become hot *** integrated satellite and terrestrial systems have been widely discussed by industries and academics,and even are expected to be applied in those huge constellations in *** paper points out the trends of two stages towards system integration of the terrestrial mobile communication and the satellite communications:to be compatible with 5G,and to be integrated within *** on analysis of the challenges of both stages,key technologies are thereafter analyzed in detail,covering both air interface currently discussed in 3GPP for B5G and also novel network architecture and related transmission technologies toward future 6G.

关键词： satellite communication terrestrial mobile communication system integration B5G 6G space internet

Proactive Platooning Based on C-V2X to Relieve Congestion at a Signalized Intersection

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China Communications 2023年第2期20卷 155-167页

作者： Wei Gao Yan Shi shanzhi chen The State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China The State Key Laboratory of Wireless Mobile Communications China Academy of Telecommunications TechnologyBeijing 100083China

Nowadays urban traffic congestion becomes a major issue due to the increase in vehicles that lead to more commuting time,accidents,traffic violations,and high fuel *** is a good way to solve traffic congestion because it drives with a smaller inter-vehicle distance than *** paper proposes proactive platooning based on C-V2X(cellular vehicle-to-everything)to relieve *** platooning reduces the inter-vehicle distance and increases the throughput of signalized intersections through integrating the networked control platooning and computation-centralized *** and simulation experiments of proactive platooning were conducted to verify the impact of inter-vehicle distance on platooning latency,platooning safety,and traffic *** results show that the optimal inter-vehicle distance under proactive platooning is less than half of human-driving at a signalized intersection.

关键词： platooning communication platooning safety C-V2X signalized intersection

Cooperative User-Scheduling and Resource Allocation Optimization for Intelligent Reflecting Surface Enhanced LEO Satellite Communication

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China Communications 2024年第2期21卷 227-244页

作者： Meng Meng Bo Hu shanzhi chen Jianyin Zhang State Key Lab of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Lab of Wireless Mobile Communication China Academy of Telecommunication TechnologyBeijing 100191China Research Institute of China Mobile Beijing 100053China

Lower Earth Orbit(LEO) satellite becomes an important part of complementing terrestrial communication due to its lower orbital altitude and smaller propagation delay than Geostationary satellite. However, the LEO satellite communication system cannot meet the requirements of users when the satellite-terrestrial link is blocked by obstacles. To solve this problem, we introduce Intelligent reflect surface(IRS) for improving the achievable rate of terrestrial users in LEO satellite communication. We investigated joint IRS scheduling, user scheduling, power and bandwidth allocation(JIRPB) optimization algorithm for improving LEO satellite system *** optimization problem of joint user scheduling and resource allocation is formulated as a non-convex optimization problem. To cope with this problem, the nonconvex optimization problem is divided into resource allocation optimization sub-problem and scheduling optimization sub-problem firstly. Second, we optimize the resource allocation sub-problem via alternating direction multiplier method(ADMM) and scheduling sub-problem via Lagrangian dual method ***, we prove that the proposed resource allocation algorithm based ADMM approaches sublinear convergence theoretically. Finally, we demonstrate that the proposed JIRPB optimization algorithm improves the LEO satellite communication system throughput.

关键词： convex optimization intelligent reflecting surface LEO satellite communication OFDM

A Proactive Selection Method for Dynamic Access Points Grouping in User-centric UDN

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China Communications 2021年第4期18卷 153-165页

作者： Bo Hu Fangxia Zuo Chuan’anWang shanzhi chen State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China Department of Computer Science Anhui Science and Technology UniversityAnhui 233100China State Key Laboratory of Wireless Mobile Communications China Academy of Telecommunication TechnologyBeijing 100191China

Network densification is a promising solution to fulfill network capacity requirement and transmission rate for beyond 5G and 6G wireless ***-dense network(UDN)integrates heterogeneous network resources and coordinates technologies on quality of service controlling,to provide users with flexible ***,dense deployment reduces coverage radius of the cell,resulting in an increase on handover frequency,which makes a serious impact on service *** this paper,we propose a proactive selection method for dynamic access points grouping(DAPGing)in accordance with“user-centric”philosophy,which selects target Access Points(AP)and reduces handover times to ensure communication *** method includes two criteria:1)the user’s sojourn time,which is determined by analyzing the AP coverage area;2)neighbor relationship between APs,which is determined by coverage area and signal strength characteristics between neighboring ***,candidate APs become the proactive selected ones to update the AP *** geometry is used to build system model and performance metrics are analyzed,including AP group coverage probability and average update *** analysis shows that the proposed proactive selection method brings similar coverage probability to traditional handover method,while average update frequency is reduced more than 20%selection criteria.

关键词： proactive selection user-centric ultradense network stochastic geometry model

Mobility driven network slicing: an enabler of on demand mobility management for 5G

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The Journal of China Universities of Posts and Telecommunications 2017年第4期24卷 16-26页

作者： Wang Hucheng chen shanzhi Ai Ming Shi Yan State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications State Key Laboratory of Wireless Mobile Communications China Academy of Telecommunications Technology

As different requirements on mobility support will be introduced by diversified communication scenarios in the fifth generation （5G）, on demand mobility management is put forward to simplify signaling process, reduce terminal power consumption, improve network efficiency and so on. In order to enable on demand mobility management in 5G networks, a mobility driven network slicing （MDNS） was proposed, which takes individual mobility support requirements into account while customizing networks for different mobile services. Within the MDNS framework, the actual levels of required mobility support are determined by a mobility description system, and network slice templates with the corresponding mobility management schemes are defined by a network slice description function. By instantiating the network slices, each mobile terminal could be directed to the network slice with the most appropriate mobility management scheme. Based on this, a prototype was implemented to validate the feasibility of MDNS framework, i.e. creating multiple network slices with different mobility management schemes. In addition, the performance evaluation on average cost of processing a mobility event is conducted for the proposed MDNS framework and the long term evolution （LTE） system, and operating benefits are analyzed including efficiency and scalability.

关键词： mobility driven network slicing network slicing on demand mobility management 5G

A Trajectory Prediction Based Intelligent Handover Control Method in UAV Cellular Networks

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China Communications 2019年第1期16卷 1-14页

作者： Bo Hu Hanzhang Yang Lei Wang shanzhi chen State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications State Key Lab of Wireless Mobile Communication China Academy of Telecommunication Technology

The airborne base station(ABS) can provide wireless coverage to the ground in unmanned aerial vehicle(UAV) cellular *** mobile users move among adjacent ABSs,the measurement information reported by a single mobile user is used to trigger the handover *** handover mechanism lacks the consideration of movement state of mobile users and the location relationship between mobile users,which may lead to handover misjudgments and even communication *** this paper,we propose an intelligent handover control method in UAV cellular ***,we introduce a deep learning model to predict the user *** prediction model learns the movement behavior of mobile users from the measurement information and analyzes the positional relations between mobile users such as avoiding collision and accommodating fellow ***,we propose a handover decision method,which can calculate the users' corresponding receiving power based on the predicted location and the characteristic of air-to-ground channel,to make handover decisions ***,we use realistic data sets with thousands of non-linear trajectories to verify the basic functions and performance of our proposed intelligent handover *** simulation results show that the handover success rate of the proposed method is 8% higher than existing methods.

关键词： UAV airborne base station handover control trajectory prediction deep learning

Building mm Wave on the Evolving C-V2X:mm Wave NR-V2X

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China Communications 2024年第1期21卷 88-101页

作者： shanzhi chen Xinxin He Rui Zhao Jinling Hu Xin Zhang China Information and Communication Technology Group Co. Ltd.(CICT)the State Key Laboratory of Wireless Mobile CommunicationsBeijing 100083China Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture and ConvergenceBeijing University of Posts and TelecommunicationsBeijing 100876China CICT Connected and Intelligent Technologies Co. LtdChina Academy of Telecommunication TechnologyBeijing 100191China CICT Mobile Communications Technology Co.Ltd.

Since the evolving standardization of cellular V2X(C-V2X)technologies is continuously developed by 3GPP,research on new radio(NR-V2X)has been on schedule by academic and *** millimeter wave(mm Wave)frequency band is supposed to provide large transmission bandwidth,yet the development of mm Wave band in NR-V2X is still in preliminary *** this article,a comprehensive discussion of mm Wave NR-V2X is given covering trends,standardization landscape,and enabling technologies,aiming at tackling the challenge of channel modeling,directional channel access,beamforming and blockage *** vision of mm Wave NR-V2X is to fully support the development of automated driving,holographic control display and improved in-car infotainment for the future.

关键词： C-V2X enabling technologies mmWave NR-V2X

Exploring link generation in a temporal evolution network for human mobility

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Science China(Technological Sciences) 2016年第1期59卷 16-21页

作者： SHI Yan SUN WangDong chen Bin ZHOU XiaoJuan chen shanzhi WANG ShengFeng State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Wireless Mobile Communications China Academy of Telecommunications TechnologyBeijing 100083China Datang Telecom Technology&Industry Group Beijing 100083China School of Sciences Beijing University of Posts and TelecommunicationsBeijing 100876China

The prevalence of mobile devices has spurred human mobility to be applied in mobile networking and communications by using network science, in which the temporal evolution of a network topology is of great importance for protocol design and performance analysis. This paper focuses on link generation in a temporal evolution network. Based on observations revealing the strong correlation between the connection patterns of different time periods, a link generation potential based on historical connections is proposed in this paper, aiming to provide a method for making topological predictions with less randomness. Using MIT Reality dataset, an evaluation of the accuracy of the proposed method was conducted. The experimental results demonstrate the proposal's adequacy in terms of its accuracy.

关键词： link generation temporal evolution network connection human mobility network science