虚拟化技术在企业数据中心中的应用

针对基于传统IT基础设施架构的企业数据中心所面临的应用与计算资源紧耦合、IT资源利用率整体偏低、管理维护成本高等问题,分析服务器虚拟化技术在企业数据中心基础架构建设中的具体应用.通过虚拟化软件对IT服务器和网络的虚拟化,可实现IT资源"池化"共享及按需动态弹性调度使用,通过对虚拟化资源的可视化监控和使用周期管理,可显著...     

数据中心虚拟化的控制管理研究

加强数据中心虚拟化管理,能够提升IT效率和创造客户价值。数据中心虚拟化在服务器虚拟化的基础上,运用软件整合和抽象数据中心全能IT资源,构建数据中心虚拟化资源池,集中管理和统一调度,实现资源动态伸缩和业务的即时调整。     

桌面虚拟化研究及应用

计算机虚拟化技术主要包括服务器虚拟化、桌面虚拟化和应用虚拟化,而桌面虚拟化技术是当前发展最快的,也是最具应用前景的技术.通过桌面虚拟化技术,将硬件、操作系统、应用程序以及用户数据完全分离,并对这些资源进行集中管理,实现了桌面管理的低成本、高安全.本文针对传统桌面面临的挑战,提出了桌面虚拟化的优势,介绍了桌面虚拟化端到端...     

移动核心网应用NFV的关键问题探讨及实践

基于网络功能虚拟化的背景,探讨了移动核心网应用网络功能虚拟化(NFV)需要解决的3大关键技术:基础设施平台选择、核心网云管理架构设计和转发面性能加速,并基于NFV架构定义了一种移动核心网的云管理系统架构。与传统电信核心网管理相比,该系统架构增加了对硬件资源、虚拟资源层、虚拟化网元以及完整网络功能的管理、编排和调度,增加了虚拟网元管理和虚拟网元之间的接口,增强了对通用硬件运行状态的管理能力,以便能更及时、更全面地管理通用硬件和虚拟网元,实现实时的资源和功能调度。     

基于虚拟化的无线网络规划优化平台的研究

研究一种基于虚拟化的无线网络规划优化平台。通过虚拟化技术,该平台能够集成各种无线网络规划优化软件工具,不仅保留了传统单机版软件工具使用灵活方便的优点,同时提供了集中管理、多方式远程访问、扩展性强、硬件资源按需分配以及高效率、大规模仿真的需求。介绍了平台的总体设计方案以及网络与虚拟化设计方案。对平台的使用进行了展示。     

虚拟化技术在电信服务器资源整合中的应用研究

随着电信企业中应用的服务器数量的不断增加,机架资源、电力资源、制冷系统资源变得越来越紧张,给运维管理带来了很大的挑战.虚拟化技术能提高资源利用率和管理效率,降低成本.本文就电信企业如何利用虚拟化技术提高管理水平和资源利用率进行了研究.     

服务器虚拟化关键技术探析

服务器虚拟化是云计算基础平台的核心部分,具有降低运营成本、应用平坦化、实时迁移提高服务可用性、整合资源和绿色等多重价值优势。服务器虚拟化技术涉及CPU虚拟化、内存虚拟化设备、I/O和网口虚拟化等3个硬件虚拟关键技术和实时迁移技术1个辅助功能关键技术。通过对服务器虚拟化关键技术的解析,展示了云计算的基础IT资源的构成。同时,根据服务器虚拟性能的特点,为运营云计算的服务提供商提供了选取虚拟服务器的标准。     

基于IAAS的异构虚拟化管理平台的设计与搭建

本文所阐述的异构虚拟化管理系统设计的基本思想和实现方案是以虚拟化管理思想为依据,以开源虚拟化库libvirt为技术基础,以J2EE开源开发框架为工具,实现对多平台虚拟化环境集成管理技术研究成果的可视化体现.该系统的成功建立将对各虚拟化管理平台建设起到很好的支撑作用,从而解决长期以来虚拟化管理难以工程化的问题.     

网络虚拟化的过去、现在和未来

网络虚拟化过程中主要诞生过4类过渡技术:虚拟局域网络(VLAN)、虚拟专用网络(VPN)、主动可编程网络(APN)、覆盖网络。网络虚拟化的研究现在主要集中于3个领域:云计算应用、平台化实现、软件定义网络。认为网络虚拟化的未来在性能保障、可靠性、易用性和完备性等方面需要加强,为此未来的网络虚拟化需要优化自身服务结构,并向无线网络、光网络等领域推广,此外还需要提供更加友好的可编程接口(API)以及网络功能。     

虚拟化技术在高校多媒体教学中的应用探析

本文首先分析高校教学中多媒体教室的使用现状,通过虚拟化技术中的桌面虚拟化和应用虚拟化解决日常教学管理中存在的操作系统更换,教学应用软件频繁安装、教学资源的需求和管理不协调等问题,从而减少多媒体教室管理人员的维护和管理工作量。     

天地异构网络资源融合管理与智能调度技术

针对天地网络资源跨域分散、快速配置调度难、综合利用率低等问题,开展天地异构网络资源特性及融合模式分析,以网络性能优化为目标设计天地异构网络资源融合管理架构。针对资源的异质异构性进行网络资源的分类与虚拟化,针对不同的网络服务需求进行资源多维描述和子网构建,针对业务的动态变化进行虚拟化资源的智能分配与动态调整。采用上述技术实现了网络资源的协同运用与自主调优,通过全网资源的统一调度和智能分配提高了网络资源利用率,提升了网络服务质量。     

5G SA的网络架构和关键技术

SA是5G网络演进的目标架构,当前处于商用准备阶段。由于5GSA采用全新的服务化架构、虚拟化部署,是网络架构的深刻变革,在网络部署、运营、业务模式等多方面存在一系列新的问题和挑战。描述了5G SA的总体网络架构、跨区域漫游架构、4G/5G互操作架构、全国组网架构,分析和探讨了5GC网元实现、虚拟化部署、网络切片与切片管理、边缘计算、语音、智慧运营等方面的架构、方案和关键技术。     

A virtualized infrastructure to offer network mapping functionality in SDN networks

The separation of control and forwarding planes in software‐defined networking (SDN) networks is a key issue of the SDN technology. This feature and the existence of the SDN controller allow the developing of dynamic, adaptable and manageable networks, networks that require adequate services, and applications. However, the separation of these planes prevents the use of existing powerful tools that were coded considering traditional networks. In this paper, we make use of the potential of network virtualization (NV) technologies to propose the use of a virtualized infrastructure that makes possible the incorporation of these existing services and/or applications to an SDN network, without the need for programming additional and complex software modules in the SDN controller. Thus, in this paper, NV is not employed to develop a network managed by SDN but to broaden and give support to the SDN control layer. As an example, we describe the incorporation of nmap (a versatile and powerful tool widely used by security experts for network exploration) into the SDN framework. It is only necessary to develop a simple control plane service that thanks to the proposed virtualized infrastructure allows the inclusion of this powerful management application. The result offers the complete functionality of the nmap utility to the network administrators, who control the SDN network through the out‐of‐band control plane. In addition, a northbound REST API has been defined to offer the main functionality of the tool (host discovery, port scanning, and operating system detection) to the application layer.     

Software‐defined satellite cloud RAN

This paper provides an assessment study on the virtualization of a Digital Video Broadcasting ‐ Satellite ‐ Second Generation (DVB‐S2)/ Digital Video Broadcasting ‐ Return Channel Satellite ‐ Second Generation (DVB‐RCS2) satellite ground infrastructure and proposes a framework, named Satellite Cloud Radio Access Network (SatCloudRAN), that aims to ease the integration of satellite components in forthcoming 5G systems. Special attention is given to the design of SatCloudRAN by considering the split and placement of virtualized and nonvirtualized functions while taking into account the characteristics of the transport links connecting both type of functions. We assess how virtualization and softwarization technologies, namely, network function virtualization and software‐defined networking, can deliver part of the satellite gateway functionalities as virtual network functions and achieve a flexible and programmable control and management of satellite infrastructure. Under the network function virtualization paradigm, building virtual network function blocks that compose a satellite gateway have been identified, and their interaction exhibited. This paper also gives insights on how the SatCloudRAN approach can allow operators to provide software‐defined networking‐based (1) bandwidth on demand, (2) dynamic Quality of Service, and (3) satellite gateway diversity. Copyright © 2017 John Wiley & Sons, Ltd.     

5G行业无线专网技术与业务需求模型

5G行业无线专网已成为运营商基于5G技术赋能垂直行业的最重要产品服务之一。虚拟化、多接入边缘计算、网络切片等技术的逐渐成熟为5G行业无线专网的发展提供了关键技术保障。介绍了5G行业无线专网的发展现状、关键技术、需求模型、面临挑战和发展建议。对5G行业无线专网的概念和分类进行归纳,对实现5G行业无线专网的关键技术进行分析,并针对业务需求模型提出了设计思路和主要参考指标,最后对运营商开展5G行业无线专网类业务当前面临的挑战进行了总结并给出发展建议。     

基于可编程硬件的虚拟路由器数据平面设计与实现

未来网络体系结构创新和验证亟需建设虚拟化网络实验平台,虚拟路由器作为其中的核心组网设备,其结构和性能决定了实验平台的灵活性和承载能力.本文提出基于并行流水线的虚拟路由器数据平面结构,结合并行包分类和异步多指针轮询调度机制,在同一物理底层上实现了多个相互隔离的并行异构路由器.本设计在可编程硬件上进行了原型实现,并结合商用及软件路由器在真实的网络环境中部署、测试与实验.实验结果表明与传统单流水线结构相比,本设计能以更高灵活性和并行性支持异构的路由器实例独立运行;在逻辑资源开销和延时特性未显著增加的情况下,并行虚拟路由器可以达到与硬件可比的线速转发能力.     

基于虚拟机的数据中心能耗管理机制

文章认为虚拟化技术的广泛应用使得数据中心的能耗管理复杂化,如虚拟机迁移和服务器整合时,迁移哪个虚拟机,何时迁移虚拟机,如何放置虚拟机,整合负载需要考虑哪些问题等。整理、分类分析当前虚拟化数据中心环境中的各种能耗,对于资源和虚拟机的全局管理、合理的放置虚拟机、动态的迁移虚拟机、整合服务器等具有重大意义。文章研究了数据中心节能机制,包括虚拟化数据中心中的全局调度管理、虚拟机初始放置和整合、虚拟机在线迁移策略,以及迁移整合时对网络通信量的考虑、迁移开销、虚拟机负载相关性等。摘要:     

Game theory-based attack and defense analysis in virtual wireless networks with jammers and eavesdroppers

Dynamic spectrum sharing and cognitive radio networks were proposed to enhance the Radio Frequency (RF) spectrum utilization. However, there are several challenges to realize them in real systems, such as sensing uncertainty causing issues to licensed users, business models for licensed service providers. Wireless virtualization is regarded as a technology that leverages service level agreements to sublease unused or underutilized RF spectrum that addresses aforementioned issues and helps to significantly enhance the utilization of the RF spectrum, offer improved coverage and capacity of networks, enhance network security and reduce energy consumption. With wireless virtualization, wireless networks' physical substrate is shared and reconfigured dynamically between virtual wireless networks through Mobile Virtual Network Operations (MVNOs). Wireless virtualization with dynamic configurable features of Wireless Infrastructure Providers (WIPs), virtualized wireless networks are vulnerable to a multitude of attacks, including jamming attacks and eavesdropping attacks. This paper investigates a means of defense through the employment of coalition game theory when jammers try to degrade the signal quality of legitimate users, and eavesdroppers aim to reduce secrecy rates. Specifically, we consider a virtual wireless network where MVNO users' job is to improve their Signal to Interference plus Noise Ratio (SINR) while the jammers target to collectively enhance their Jammer Received Signal Strength (JRSS), and an eavesdropper's goal is to reduce the overall secrecy rate. Numerical results have demonstrated that the proposed game strategies are effective (in terms of data rate, secrecy rate and latency) against such attackers compared to the traditional approaches.     

CE2RV: Commissioned energy-efficient virtualization for large-scale heterogeneous wireless sensor networks

The Internet of Things (IoT) comprises sensor networks, intelligent things, devices, and humans for heterogeneous services and applications. Energy constraints in conventional wireless networks impact IoT performance resulting in service failures. For reducing the adverse impact of energy, this article introduces a commissioned energy-efficient resource virtualization (CE2RV) scheme. This proposed scheme classifies the sensor nodes as fast and slow-depleting for identifying service failures. The fast-depleting nodes are discontinued from the service replications, and the remaining energy high-node-connected resources are identified. Such resources are virtualized for thwarting the existing energy failures over various services. The node classifications are performed using a tree-learning algorithm. The classifications are performed for node replacement and service virtualization under different energy depletion rates. This is required for preventing sensor network disconnections between the users and service providers. The classification is required for overcoming multiple virtualizations between common nodes across different service providers. The proposed scheme's performance is analyzed using the metrics of service disconnections, energy utilization, energy efficiency, and service delay.