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
The development of the Next-Generation Wireless Network(NGWN)is becoming a reality.To conduct specialized processes more,rapid network deployment has become essential.Methodologies like Network Function Virtualization...The development of the Next-Generation Wireless Network(NGWN)is becoming a reality.To conduct specialized processes more,rapid network deployment has become essential.Methodologies like Network Function Virtualization(NFV),Software-Defined Networks(SDN),and cloud computing will be crucial in addressing various challenges that 5G networks will face,particularly adaptability,scalability,and reliability.The motivation behind this work is to confirm the function of virtualization and the capabilities offered by various virtualization platforms,including hypervisors,clouds,and containers,which will serve as a guide to dealing with the stimulating environment of 5G.This is particularly crucial when implementing network operations at the edge of 5G networks,where limited resources and prompt user responses are mandatory.Experimental results prove that containers outperform hypervisor-based virtualized infrastructure and cloud platforms’latency and network throughput at the expense of higher virtualized processor use.In contrast to public clouds,where a set of rules is created to allow only the appropriate traffic,security is still a problem with containers.展开更多
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
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
NFV(network function virtualization,网络功能虚拟化)系统主要包括NFVI、VNF和MANO三大功能模块以及子功能模块,相对传统网络架构,网络功能虚拟化解耦了传统专用设备的软硬件,引入了虚拟化技术来池化物理资源,对网络架构的改动很大。...NFV(network function virtualization,网络功能虚拟化)系统主要包括NFVI、VNF和MANO三大功能模块以及子功能模块,相对传统网络架构,网络功能虚拟化解耦了传统专用设备的软硬件,引入了虚拟化技术来池化物理资源,对网络架构的改动很大。对NFV弹性技术进行了分析,强调了网络虚拟化的弹性目标主要是确保业务的连续性,应用设计本身和虚拟化设施均受此目标影响。归纳了弹性结构设计原则,给出弹性用例并进行总结。展开更多
针对当前直播系统并发性能低下,结合软件定义网络(Software Defined Networking,SDN)和网络功能虚拟化(Network Function Virtualization,NFV)技术的新型网络技术快速演进,在综合考虑直播集群技术优势的基础上,设计并实现了基于SDN网络...针对当前直播系统并发性能低下,结合软件定义网络(Software Defined Networking,SDN)和网络功能虚拟化(Network Function Virtualization,NFV)技术的新型网络技术快速演进,在综合考虑直播集群技术优势的基础上,设计并实现了基于SDN网络和NFV技术架构的Red5直播集群,并在实际环境中跟传统网络架构的Red5集群系统性能进行对比测试。测试结果表明,此直播集群系统比传统网络架构的Red5集群系统并发性高。展开更多
文摘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。
基金supported by Future University Researchers Supporting Project Number FUESP-2020/48 at Future University in Egypt,New Cairo 11845,Egypt.
文摘The development of the Next-Generation Wireless Network(NGWN)is becoming a reality.To conduct specialized processes more,rapid network deployment has become essential.Methodologies like Network Function Virtualization(NFV),Software-Defined Networks(SDN),and cloud computing will be crucial in addressing various challenges that 5G networks will face,particularly adaptability,scalability,and reliability.The motivation behind this work is to confirm the function of virtualization and the capabilities offered by various virtualization platforms,including hypervisors,clouds,and containers,which will serve as a guide to dealing with the stimulating environment of 5G.This is particularly crucial when implementing network operations at the edge of 5G networks,where limited resources and prompt user responses are mandatory.Experimental results prove that containers outperform hypervisor-based virtualized infrastructure and cloud platforms’latency and network throughput at the expense of higher virtualized processor use.In contrast to public clouds,where a set of rules is created to allow only the appropriate traffic,security is still a problem with containers.
文摘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。
基金supported by the Researchers Supporting Project of King Saud University,Riyadh,Saudi Arabia,under Project RSPD2025R681。
文摘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.
文摘NFV(network function virtualization,网络功能虚拟化)系统主要包括NFVI、VNF和MANO三大功能模块以及子功能模块,相对传统网络架构,网络功能虚拟化解耦了传统专用设备的软硬件,引入了虚拟化技术来池化物理资源,对网络架构的改动很大。对NFV弹性技术进行了分析,强调了网络虚拟化的弹性目标主要是确保业务的连续性,应用设计本身和虚拟化设施均受此目标影响。归纳了弹性结构设计原则,给出弹性用例并进行总结。
文摘针对当前直播系统并发性能低下,结合软件定义网络(Software Defined Networking,SDN)和网络功能虚拟化(Network Function Virtualization,NFV)技术的新型网络技术快速演进,在综合考虑直播集群技术优势的基础上,设计并实现了基于SDN网络和NFV技术架构的Red5直播集群,并在实际环境中跟传统网络架构的Red5集群系统性能进行对比测试。测试结果表明,此直播集群系统比传统网络架构的Red5集群系统并发性高。
