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Effective Edge-Cloud Interplay for NFV-Based Optical Metro-Access Networks Supporting IoT Services 认领 引用 被引量：2
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作者 Jin Feiming Zhang Yukun +2 位作者 Li Hanxue Amr Tolba Zhang Tiantian 《China Communications》 SCIE EI CSCD 2025年第4期117-128,共12页
In optical metro-access networks,Access Points(APs)and Data Centers(DCs)are located on the fiber ring.In the cloud-centric solution,a large number of Internet of Things(IoT)data pose an enormous burden on DCs,so the V... In optical metro-access networks,Access Points(APs)and Data Centers(DCs)are located on the fiber ring.In the cloud-centric solution,a large number of Internet of Things(IoT)data pose an enormous burden on DCs,so the Virtual Machines(VMs)cannot be successfully launched due to the server overload.In addition,transferring the data from the AP to the remote DC may cause an undesirable delivery delay.For this end,we propose a promising solution considering the interplay between the cloud DC and edge APs.More specifically,bringing the partial capability of computing in APs close to things can reduce the pressure of DCs while guaranteeing the expected Quality of Service(QoS).In this work,when the cloud DC resource becomes limited,especially for delay sensitive but not computing-dependent IoT applications,we degrade their VMs and migrate them to edge APs instead of the remote DC.To avoid excessive VM degradation and computing offloading,we derive appropriate VM degradation coefficients based on classic microeconomic theory.Simulation results demonstrate that our algorithms improve the service providers'utility with the ratio from 34%to 89%over traditional cloud-centric solutions. 展开更多
关键词 computing offloading edge-cloud interplay network function virtualization optical metroaccess network service degradability
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SAVNFV:Towards a Scalable and Accurate Inter-Domain Source Address Validation Platform with Network Functions Virtualization 认领 引用
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作者 Shu Yang Zequn Zhang Laizhong Cui 《Big Data Mining and Analytics》 EI CSCD 2026年第2期536-553,共18页
Nowadays,Source Address Validation(SAV)is increasingly important for defending Distributed Denial of Service(DDoS)attacks and other malicious activities.Existing ingress/edge filtering-based solutions,such as SAVI,fil... Nowadays,Source Address Validation(SAV)is increasingly important for defending Distributed Denial of Service(DDoS)attacks and other malicious activities.Existing ingress/edge filtering-based solutions,such as SAVI,filter spoofed source addresses using Access Control Lists(ACL)or unicast Reverse Path Forwarding(uRPF),but they only provide coarse-grained filtering.Source Address Validation in intra-domain and inter-domain NETworks(SAVNET)has recently attracted much attention in both industry and the Internet Engineering Task Force(IETF),deploying SAV inside Internet Service Provider(ISP)networks and generating SAV tables by binding source address prefixes with incoming interfaces.However,SAVNET requires upgrading almost all routers across networks,which is impractical—especially in inter-domain scenarios.Moreover,due to policy routing and load balancing,determining the exact incoming interface for each source prefix is challenging.In this paper,we propose SAVNFV,a Network Functions Virtualization(NFV)based platform that provides SAV capabilities by building a“clean”virtual overlay network.SAVNFV randomly generates paths for each flow through a centralized controller,making the SAV table easy to obtain.The paths are periodically refreshed,and packets are transmitted through multiple routes,making it nearly impossible for attackers to identify the correct incoming interface.We formulate the multi-path transmission as an optimization problem and prove it to be NP-Complete,then design approximation algorithms with theoretical guarantees.Comprehensive simulations show that SAVNFV blocks 94.6%more malicious traffic than traditional solutions while maintaining acceptable path stretch.We also implement the system using open-source routing software and build a real-world experimental platform to further validate our design. 展开更多
关键词 Source Address Validation(SAV) Network Functions Virtualization(NFV) Distributed Denial of Service(DDoS)attacks multi-path routing
IMS行政交换NFV核心网的网元资源配置方法 认领 引用
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作者 柳旭 梅增杨 +2 位作者 束一 贾平 祁步仁 《自动化技术与应用》 2026年第4期146-154,168,共9页
网络功能虚拟化技术将电信网功能网元以虚拟化的形式部署在通用硬件服务器上,减少对特定硬件的依赖。IMS行政交换NFV核心网在设计轻量级组网方案时,行政交换用户需求与NFV核心网算力资源、NFV核心网元合理配置的适配成为关键问题。针对... 网络功能虚拟化技术将电信网功能网元以虚拟化的形式部署在通用硬件服务器上,减少对特定硬件的依赖。IMS行政交换NFV核心网在设计轻量级组网方案时,行政交换用户需求与NFV核心网算力资源、NFV核心网元合理配置的适配成为关键问题。针对网络功能虚拟化环境下IMS行政交换网的核心网元资源配置问题,为提高网络灵活性、可靠性及资源利用率,提出一种混合组网轻量级优化方法。首先,构建虚拟网元与物理网元的混合架构,结合最小二乘法拟合用户规模与资源需求的动态关系模型;其次,基于贪心算法设计单节点最简配置方案,利用递归算法实现分级冗余部署;最后,通过多活实例同步与动态扩容技术优化双节点冗余配置。实验结果表明,所提方法显著优于传统静态配置,单节点最简配置降低硬件成本35%,双节点冗余配置在资源利用率损失仅4%~6%的条件下实现99.99%可用性,起到了良好的优化效果。 展开更多
关键词 IMS行政交换网 网络功能虚拟化 资源配置 多媒体子系统 轻量级NFV
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Security Monitoring and Management for the Network Services in the Orchestration of SDN-NFV Environment Using Machine Learning Techniques 认领 引用 被引量：2
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作者 Nasser Alshammari Shumaila Shahzadi +7 位作者 Saad Awadh Alanazi Shahid Naseem Muhammad Anwar Madallah Alruwaili Muhammad Rizwan Abid Omar Alruwaili Ahmed Alsayat Fahad Ahmad 《Computer Systems Science & Engineering》 2024年第2期363-394,共32页
Software Defined Network(SDN)and Network Function Virtualization(NFV)technology promote several benefits to network operators,including reduced maintenance costs,increased network operational performance,simplified ne... Software Defined Network(SDN)and Network Function Virtualization(NFV)technology promote several benefits to network operators,including reduced maintenance costs,increased network operational performance,simplified network lifecycle,and policies management.Network vulnerabilities try to modify services provided by Network Function Virtualization MANagement and Orchestration(NFV MANO),and malicious attacks in different scenarios disrupt the NFV Orchestrator(NFVO)and Virtualized Infrastructure Manager(VIM)lifecycle management related to network services or individual Virtualized Network Function(VNF).This paper proposes an anomaly detection mechanism that monitors threats in NFV MANO and manages promptly and adaptively to implement and handle security functions in order to enhance the quality of experience for end users.An anomaly detector investigates these identified risks and provides secure network services.It enables virtual network security functions and identifies anomalies in Kubernetes(a cloud-based platform).For training and testing purpose of the proposed approach,an intrusion-containing dataset is used that hold multiple malicious activities like a Smurf,Neptune,Teardrop,Pod,Land,IPsweep,etc.,categorized as Probing(Prob),Denial of Service(DoS),User to Root(U2R),and Remote to User(R2L)attacks.An anomaly detector is anticipated with the capabilities of a Machine Learning(ML)technique,making use of supervised learning techniques like Logistic Regression(LR),Support Vector Machine(SVM),Random Forest(RF),Naïve Bayes(NB),and Extreme Gradient Boosting(XGBoost).The proposed framework has been evaluated by deploying the identified ML algorithm on a Jupyter notebook in Kubeflow to simulate Kubernetes for validation purposes.RF classifier has shown better outcomes(99.90%accuracy)than other classifiers in detecting anomalies/intrusions in the containerized environment. 展开更多
关键词 Software defined network network function virtualization network function virtualization management and orchestration virtual infrastructure manager virtual network function Kubernetes Kubectl artificial intelligence machine learning
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A movement-assisted software-defined sensor network with NFV support 认领 引用 被引量：2
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作者 Yin Haohao Ding Cui +2 位作者 Yan Feng Xia Weiwei Shen Lianfeng 《Journal of Southeast University(English Edition)》 EI CAS 2018年第2期156-165,共10页
A flexible and controllable movement-assisted software-defined sensor network(MA-SDSN)based on the software-defined network(SDN)and network function virtualization(NFV)is proposed.First,a three-layer fundamental archi... A flexible and controllable movement-assisted software-defined sensor network(MA-SDSN)based on the software-defined network(SDN)and network function virtualization(NFV)is proposed.First,a three-layer fundamental architecture is proposed to overcome the inherent distributed management and rigidity of the conventional wireless sensor networks.Furthermore,the platform for research and development of MA-SDSN is established,and the dumb node(DN),the software-defined node(SN)and the movement-assisted node(MN)are designed and implemented.Then,the southbound application programming interface(API)is designed to provide a series of frames for communication between controllers and sensor nodes.The northbound API is developed and demonstrated overall and in detail.The functions of the controller are presented including topology discovery,dynamic networking,packet processing,mobility management and virtualization.Followed by the MA-SDSN network model,a Markov chain-based movement-assisted weighted relocation(MMWR)topology control algorithm is proposed to redeploy the MNs based on the node status and weight.Simulation results and analysis indicate that the proposed algorithm based on the MA-SDSN extends network lifetime with a lower average power consumption. 展开更多
关键词 software-defined sensor network network function virtualization movement-assisted topology control
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ApplianceBricks: A Scalable Network Appliance Architecture for Network Functions Virtualization 认领 引用 被引量：2
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作者 MA Shicong WANG Baosheng +1 位作者 ZHANG Xiaozhe GAO Xianming 《China Communications》 SCIE CSCD 2016年第S1期32-42,共11页
Network Functions Virtualization(NFV) is an attempt to help operators more effectively manage their networks by implementing traditional network functions embedded in specialized hardware platforms in term of virtuali... Network Functions Virtualization(NFV) is an attempt to help operators more effectively manage their networks by implementing traditional network functions embedded in specialized hardware platforms in term of virtualized software instances. But, existing novel network appliances designed for NFV infrastructure are always architected on a general-purpose x86 server, which makes the performance of network functions limited by the hosted single server. To address this challenge, we propose ApplianceB ricks, a novel NFV-enable network appliance architecture that is used to explore the way of consolidating multiple physical network functions into a clustered network appliance, which is able to improve the processing capability of NFV-enabled network appliances. 展开更多
关键词 NFV network appliance virtualization software routers cluster-based appliances consolidation scalability
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Adaptive Partial Task Offloading and Virtual Resource Placement in SDN/NFV-Based Network Softwarization 认领 引用
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作者 Prohim Tam Sa Math Seokhoon Kim 《Computer Systems Science & Engineering》 SCIE EI 2023年第5期2141-2154,共14页
Edge intelligence brings the deployment of applied deep learning(DL)models in edge computing systems to alleviate the core backbone network congestions.The setup of programmable software-defined networking(SDN)control... Edge intelligence brings the deployment of applied deep learning(DL)models in edge computing systems to alleviate the core backbone network congestions.The setup of programmable software-defined networking(SDN)control and elastic virtual computing resources within network functions virtualization(NFV)are cooperative for enhancing the applicability of intelligent edge softwarization.To offer advancement for multi-dimensional model task offloading in edge networks with SDN/NFV-based control softwarization,this study proposes a DL mechanism to recommend the optimal edge node selection with primary features of congestion windows,link delays,and allocatable bandwidth capacities.Adaptive partial task offloading policy considered the DL-based recommendation to modify efficient virtual resource placement for minimizing the completion time and termination drop ratio.The optimization problem of resource placement is tackled by a deep reinforcement learning(DRL)-based policy following the Markov decision process(MDP).The agent observes the state spaces and applies value-maximized action of available computation resources and adjustable resource allocation steps.The reward formulation primarily considers taskrequired computing resources and action-applied allocation properties.With defined policies of resource determination,the orchestration procedure is configured within each virtual network function(VNF)descriptor using topology and orchestration specification for cloud applications(TOSCA)by specifying the allocated properties.The simulation for the control rule installation is conducted using Mininet and Ryu SDN controller.Average delay and task delivery/drop ratios are used as the key performance metrics. 展开更多
关键词 Deep learning partial task offloading software-defined networking virtual machine virtual network functions
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SDNMS: A Software Defined Network Measurement System for NFV Networks 认领 引用 被引量：5
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作者 Tianqi Zhang Ming Chen +2 位作者 Xianglin Wei Bing Chen Chao Hu 《China Communications》 SCIE CSCD 2019年第4期59-74,共16页
As a promising technology to completely transform how we architect, deploy, operate and manage various networks, software-based Network Function Virtualization(NFV) enables hardware-independent, flexible, fast and eff... As a promising technology to completely transform how we architect, deploy, operate and manage various networks, software-based Network Function Virtualization(NFV) enables hardware-independent, flexible, fast and efficient network service provision. With the increasing popularity of NFV paradigm, the Internet has also transformed to be a hybrid environment where NFV-based network entities coexist with traditional network devices. To facilitate our understanding, design, evaluate and manage of such novel network environment, there is a great need for a new NFV-compatible network measurement system which is still in absent so far. To bridge this gap, a system, named Software Defined Network Measurement System(SDNMS), is presented in this paper. Firstly, the architecture of SDNMS is proposed. In this architecture, a formal method to describe the working mode of the network measurement is defined. This method can also be utilized to generate a network measurement middle box(NMMB) in a specific location of the NFV network according to the customized description file, and to flexibly deploy the network measurement function. Secondly, the technology of virtual network measurement function(VNMF) combined with LXC is studied to form NMMB function. Thirdly, a control method is presented to control the start, stop, and update NMMB to form a specific network measurement system function. Finally, a prototype of SDNMS with network monitoring function to monitor network performance anomalies and locate faults is introduced. Experimental results have shown that SDNMS architecture and related technologies are feasible and effective to deploy and control network measurement functions in NFV networks. We hope SDNMS could provide a new method for practitioners to conduct network management and research at the age of NFV. 展开更多
关键词 network function virtualization network measurement system architecture network measurement function service chain
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Network Function Virtualization Technology:Progress and Standardization 认领 引用 被引量：1
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作者 Huiling Zhao Yunpeng Xie Fan Shi 《ZTE Communications》 2014年第2期3-7,共5页
Network innovation and business transformation are both necessary for telecom operators to adapt to new situations, but operators face challenges in terms of network bearer complexity, business centralization, and IT/... Network innovation and business transformation are both necessary for telecom operators to adapt to new situations, but operators face challenges in terms of network bearer complexity, business centralization, and IT/CT integration. Network function virtualization （NFV） may inspire new development ideas, but many doubts still exist within industry, especially about how to introduce NFV into an operator＇ s network. This article describes the latest progress in NFV standardization, NFV requirements and hot technology issues, and typical NFV applications in an operator networks. 展开更多
关键词 network functions virtualization （NFV） overlay network virtual extensible LAN （VXLAN） service chaining
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Enhanced Reliability in Network Function Virtualization by Hybrid Hexagon-Cost Efficient Algorithm 认领 引用
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作者 D.Jeyakumar C.Rajabhushanam 《Computer Systems Science & Engineering》 SCIE EI 2022年第12期1131-1144,共14页
In this,communication world, the Network Function Virtualization concept is utilized for many businesses, small services to virtualize the network nodefunction and to build a block that may connect the chain, communic... In this,communication world, the Network Function Virtualization concept is utilized for many businesses, small services to virtualize the network nodefunction and to build a block that may connect the chain, communication services.Mainly, Virtualized Network Function Forwarding Graph (VNF-FG) has beenused to define the connection between the VNF and to give the best end-to-endservices. In the existing method, VNF mapping and backup VNF were proposedbut there was no profit and reliability improvement of the backup and mapping ofthe primary VNF. As a consequence, this paper offers a Hybrid Hexagon-CostEfficient algorithm for determining the best VNF among multiple VNF and backing up the best VNF, lowering backup costs while increasing dependability. TheVNF is chosen based on the highest cost-aware important measure (CIM) rate,which is used to assess the relevance of the VNF forwarding graph.To achieveoptimal cost-efficiency, VNF with the maximum CIM is selected. After the selection process, updating is processed by three steps which include one backup VNFfrom one SFC, two backup VNF from one Service Function Chain (SFC),and twobackup VNF from different SFC. Finally, this proposed method is compared withCERA, MinCost, MaxRbyInr based on backup cost, number of used PN nodes,SFC request utility, and latency. The simulation result shows that the proposedmethod cuts down the backup cost and computation time by 57% and 45% compared with the CER scheme and improves the cost-efficiency. As a result, this proposed system achieves less backup cost, high reliability, and low timeconsumption which can improve the Virtualized Network Function operation. 展开更多
关键词 Network function virtualized(NFV) hybrid hexagon-cost efficient algorithm(HH-CE) cost-aware important measure(CIM) reliability network services
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基于SDN和NFV的空天地一体化网络任务部署与恢复综述 认领 引用 被引量：7
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作者 曹怡璐 贾子晔 +2 位作者 尤嘉豪 张磊 吴启晖 《电信科学》 北大核心 2025年第5期1-16,共16页
空天地一体化网络作为6G技术的关键组成,在整合天基、空基和地基网络时,面临节点异构性、业务多样性等挑战,进而引发资源分配、竞争及故障风险等问题。基于此,聚焦基于软件定义网络(software defined network,SDN)与网络功能虚拟化(netw... 空天地一体化网络作为6G技术的关键组成,在整合天基、空基和地基网络时,面临节点异构性、业务多样性等挑战,进而引发资源分配、竞争及故障风险等问题。基于此,聚焦基于软件定义网络(software defined network,SDN)与网络功能虚拟化(network functions virtualization,NFV)的空天地一体化网络任务部署与恢复,首先阐述了空天地一体化网络系统架构,介绍了各层网络构成、SDN和NFV原理及其相关应用,然后,针对上述挑战,以服务功能链技术为抓手,提出了面向任务的服务功能链优化部署、利用智能算法实现动态调度、通过匹配博弈算法完成失效恢复等策略,最后,构建了一个用例,设定节点部署、服务功能链建模等,验证了所提策略在提升服务功能链完成效率以及应对资源故障方面的有效性,旨在为空天地一体化网络资源管理提供理论基础。 展开更多
关键词 空天地一体化网络 SDN NFV 服务功能链 资源分配
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Space Network Emulation System Based on a User-Space Network Stack 认领 引用
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作者 LEI Jianzhe ZHAO Kanglian +1 位作者 HOU Dongxu ZHOU Fenlin 《ZTE Communications》 2025年第2期11-19,共9页
This paper presents a space network emulation system based on a user-space network stack named Nos to solve space networks'unique architecture and routing issues and kernel stacks'inefficiency and development ... This paper presents a space network emulation system based on a user-space network stack named Nos to solve space networks'unique architecture and routing issues and kernel stacks'inefficiency and development complexity.Our low Earth orbit satellite scenario emulation verifies the dynamic routing function of the protocol stack.The proposed system uses technologies like Open vSwitch(OVS)and traffic control(TC)to emulate the space network's highly dynamic topology and time-varying link characteristics.The emulation results demonstrate the system's high reliability,and the user-space network stack reduces development complexity and debugging difficulty,providing convenience for the development of space network protocols and network functions. 展开更多
关键词 network emulation space network user-space network stack network function virtualization
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Virtualizing Network and Service Functions: Impact on ICT Transformation and Standardization 认领 引用 被引量：1
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作者 Bhumip Khasnabish Jie Hu Ghazanfar Ali 《ZTE Communications》 2013年第4期40-46,共7页
Virtualization of network/service functions means time sharing network/service（and affiliated）resources in a hyper speed manner.The concept of time sharing was popularized in the 1970s with mainframe computing.The s... Virtualization of network/service functions means time sharing network/service（and affiliated）resources in a hyper speed manner.The concept of time sharing was popularized in the 1970s with mainframe computing.The same concept has recently resurfaced under the guise of cloud computing and virtualized computing.Although cloud computing was originally used in IT for server virtualization,the ICT industry is taking a new look at virtualization.This paradigm shift is shaking up the computing,storage,networking,and ser vice industries.The hope is that virtualizing and automating configuration and service management/orchestration will save both capes and opex for network transformation.A complimentary trend is the separation（over an open interface）of control and transmission.This is commonly referred to as software defined networking（SDN）.This paper reviews trends in network/service functions,efforts to standardize these functions,and required management and orchestration. 展开更多
关键词 network function virtualization（NFV） and chaining service function virtualization（SFV） and chaining network virtualization overlay（NVO） software defined networking（SDN） networking economics
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基于SDN与NFV协同优化的广播网络架构设计 认领 引用
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作者 方志祥 《电视技术》 2025年第5期179-181,共3页
为提高现阶段广播网络的运营效率,在降低广播网络运维成本的同时提升直播信号的质量和用户体验,提出在电视广播中的直播场景及广播信号处理环节分别部署软件定义网络(Software Defined Network,SDN)和网络功能虚拟化(Network Function V... 为提高现阶段广播网络的运营效率,在降低广播网络运维成本的同时提升直播信号的质量和用户体验,提出在电视广播中的直播场景及广播信号处理环节分别部署软件定义网络(Software Defined Network,SDN)和网络功能虚拟化(Network Function Virtualization,NFV)网络架构。利用回传网络采集多场馆的信号,根据实时流量情况动态分配网络资源,同时在应对突发事件或临时增加直播需求时,SDN快速重新配置网络,优化调度直播流量。基于SDN架构,在广播信号处理环节通过NFV技术虚拟化视频编转码和用户权限认证,确保信号处理和分发环节的高效性。 展开更多
关键词 软件定义网络(SDN) 网络功能虚拟化(NFV) 广播网络架构
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Using the Cooperative Game for Service Placement of Virtual Network Functions 认领 引用 被引量：1
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作者 XIONG Gang HU Yuxiang +1 位作者 WANG Weiming WANG Lingqiang 《China Communications》 SCIE CSCD 2016年第S1期146-157,共12页
To address the issues that middleboxes as a fundamental part of today's networks are facing, Network Function Virtualization(NFV)has been recently proposed, which in essence asserts to migrate hardware-based middl... To address the issues that middleboxes as a fundamental part of today's networks are facing, Network Function Virtualization(NFV)has been recently proposed, which in essence asserts to migrate hardware-based middleboxes into software-based virtualized function entities.Due to the demands of virtual services placement in NFV network environment, this paper models the service amount placement problem involving with the resources allocation as a cooperative game and proposes the placement policy by Nash Bargaining Solution(NBS). Specifically,we first introduce the system overview and apply the rigorous cooperative game-theoretic guide to build the mathematical model, which can give consideration to both the responding efficiency of service requirements and the allocation fairness.Then a distributed algorithm corresponding to NBS is designed to achieve predictable network performance for virtual instances placement.Finally, with simulations under various scenarios,the results show that our placement approach can achieve high utilization of network through the analysis of evaluation metrics namely the satisfaction degree and fairness index. With the suitable demand amount of services, the average values of two metrics can reach above 90%. And by tuning the base placement, our solution can enable operators to flexibly balance the tradeoff between satisfaction and fairness of resourcessharing in service platforms. 展开更多
关键词 Middlebox game theory network function virtualization software defined networking
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AI驱动的网络功能虚拟化:下一代网络的自动化与弹性扩展 认领 引用
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作者 梁桂才 李玉荣 《通信与信息技术》 2026年第1期125-131,共7页
提出一种基于人工智能(AI)的网络功能虚拟化(NFV)架构,以提升网络管理的自动化、弹性和智能化水平。通过集成深度学习和强化学习算法,AI驱动的NFV实现了动态资源分配、实时流量预测和智能故障恢复。实验结果表明,相较于传统NFV,AI驱动... 提出一种基于人工智能(AI)的网络功能虚拟化(NFV)架构,以提升网络管理的自动化、弹性和智能化水平。通过集成深度学习和强化学习算法,AI驱动的NFV实现了动态资源分配、实时流量预测和智能故障恢复。实验结果表明,相较于传统NFV,AI驱动架构在资源利用率上提升了20%、系统响应时间减少了30%、网络吞吐量提高了25%、丢包率降低了15%、服务质量(QoS)提升了10%及故障恢复时间缩短了30%。消融实验验证了各AI组件的有效性。研究还探讨了该架构在5G/6G、智能边缘计算和云网络中的应用潜力,展示了其优化网络性能和管理效率的显著优势。尽管面临训练数据需求和算法复杂度等挑战,研究表明AI驱动NFV在未来网络中具有广阔的应用前景。 展开更多
关键词 AI 网络功能虚拟化 自动化 弹性扩展
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基于最优功率补偿和惯量阻尼自适应的虚拟同步机综合控制策略 认领 引用 被引量：3
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作者 凌果 何山 +1 位作者 樊小朝 徐立军 《太阳能学报》 EI CAS CSCD 北大核心 2026年第3期134-145,共12页
为改善可再生能源并网逆变器在多运行模式(并网模式和孤岛模式)下的动态响应能力,提出一种基于最优功率补偿和惯量阻尼自适应的虚拟同步机(VSG)综合控制策略。首先,建立传统VSG数学模型,分析其虚拟参数变化对系统稳定性的影响;其次,提... 为改善可再生能源并网逆变器在多运行模式(并网模式和孤岛模式)下的动态响应能力,提出一种基于最优功率补偿和惯量阻尼自适应的虚拟同步机(VSG)综合控制策略。首先,建立传统VSG数学模型,分析其虚拟参数变化对系统稳定性的影响;其次,提出基于径向基函数(RBF)的VSG自适应方法,实现参数解耦,使得系统参数随频率的变化动态调整;然后,基于VSG有功-频率方程构建并离散化预测模型,设计以角频率偏差和VSG输出功率为性能指标的代价函数;通过二次规划计算出最优功率增量,实时调整VSG的有功参考值,从而改善暂态过程中的功频响应特性。最后,实验结果表明,所提控制策略有效抑制输出功率和频率的超调与振荡,减小频率的变化率和偏差,提升功频响应速度。 展开更多
关键词 并网逆变器 虚拟同步机 模型预测控制 RBF神经网络 二次规划 功频响应
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6G service-oriented space-air-ground integrated network: A survey 认领 引用 被引量：28
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作者 Nan CHENG Jingchao HE +5 位作者 Zhisheng YIN Conghao ZHOU Huaqing WU Feng LYU Haibo ZHOU Xuemin SHEN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2022年第9期1-18,共18页
As an indispensable component of the emerging 6G networks,Space-Air-Ground Inte-grated Networks(SAGINs)are envisioned to provide ubiquitous network connectivity and services by integrating satellite networks,aerial ne... As an indispensable component of the emerging 6G networks,Space-Air-Ground Inte-grated Networks(SAGINs)are envisioned to provide ubiquitous network connectivity and services by integrating satellite networks,aerial networks,and terrestrial networks.In 6G SAGINs,a wide variety of network services with the features of diverse requirements,complex mobility,and multi-dimensional resources will pose great challenges to service provisioning,which urges the develop-ment of service-oriented SAGINs.In this paper,we conduct a comprehensive review of 6G SAGINs from a new perspective of service-oriented network.First,we present the requirements of service-oriented networks,and then propose a service-oriented SAGINs management architec-ture.Two categories of critical technologies are presented and discussed,i.e.,heterogeneous resource orchestration technologies and the cloud-edge synergy technologies,which facilitate the interoperability of different network segments and cooperatively orchestrate heterogeneous resources across different domains,according to the service features and requirements.In addition,the potential future research directions are also presented and discussed. 展开更多
关键词 Mobile Edge Computing(MEC) Network Function Virtual-ization(NFV) Network slicing Service-oriented network Software Defined Network-ing(SDN) Space-Air-Ground Inte-grated Networks(SAGINs)
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应用改进图神经网络的虚拟仿真实验资源动态推荐方法 认领 引用
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作者 童绪军 陈涛 《西昌学院学报（自然科学版）》 2026年第1期115-120,共6页
针对目标资源需求节点过多,造成学习者与虚拟仿真实验资源适配度较低,推荐效果不佳的问题,提出了基于改进图神经网络的动态推荐方法。构建实验资源多维度特征关联图,改进图神经网络结构以实现目标资源需求节点信息在关联图中的传递;利用... 针对目标资源需求节点过多,造成学习者与虚拟仿真实验资源适配度较低,推荐效果不佳的问题,提出了基于改进图神经网络的动态推荐方法。构建实验资源多维度特征关联图,改进图神经网络结构以实现目标资源需求节点信息在关联图中的传递;利用Sigmoid激活函数从该关联图中提取虚拟仿真实验资源的特征信息;在此基础上构建基于改进图神经网络的动态推荐结构,生成初始低维嵌入向量,构造交互行为传播的1阶协同信号,及时更新嵌入向量,并计算任意学习者与实验资源之间的适配度,将此适配度作为推荐依据。为验证方法有效性,选取4类典型学习者(编号为1、2、3、4)进行测试,实验结果表明,该方法为学习者1、2、3、4分别推荐适配度最高为40%、80%、60%、80%的资源,这与预设的实验适配度指标一致,且耗时仅为4 s,显示出较佳的推荐效果。 展开更多
关键词 改进图神经网络 虚拟仿真实验资源 动态推荐 多维度特征关联图 Sigmoid激活
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Efficiency-optimized 6G:A virtual network resource orchestration strategy by enhanced particle swarm optimization 认领 引用 被引量：3
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作者 Sai Zou Junrui Wu +4 位作者 Haisheng Yu Wenyong Wang Lisheng Huang Wei Ni Yan Liu 《Digital Communications and Networks》 SCIE CSCD 2024年第5期1221-1233,共13页
The future Sixth-Generation (6G) wireless systems are expected to encounter emerging services with diverserequirements. In this paper, 6G network resource orchestration is optimized to support customized networkslicin... The future Sixth-Generation (6G) wireless systems are expected to encounter emerging services with diverserequirements. In this paper, 6G network resource orchestration is optimized to support customized networkslicing of services, and place network functions generated by heterogeneous devices into available resources.This is a combinatorial optimization problem that is solved by developing a Particle Swarm Optimization (PSO)based scheduling strategy with enhanced inertia weight, particle variation, and nonlinear learning factor, therebybalancing the local and global solutions and improving the convergence speed to globally near-optimal solutions.Simulations show that the method improves the convergence speed and the utilization of network resourcescompared with other variants of PSO. 展开更多
关键词 Virtualization Network function orchestration Network resource virtualized orchestration (NRVO) Particle swarm optimization(PSO)
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