诺西帮江苏移动增强网络安全

江苏移动正在建设面向全IP网络的安全防护体系,应对由于网络IP化和数据业务发展面临的网络安全风险。诺西解决方案可帮助运营商提供安全可靠的电信业务,为用户带来出色的使用体验,帮助运营商牢牢把握全业务运营的机遇。随着移动客户对新业务需求的日益增长,IP网络以其高度的灵活性和突出的性价比优势渐成为了运营商提供业务的首选平台。但是传统的IT安全防护手段不足以应对全IP网络所带来的挑战,使运营商面临着严峻的安全挑战。     

诺基亚西门子助力江苏移动增强网络安全能力

随着移动客户对新业务需求的日益增长,IP网络以其高度的灵活性和突出的性价比优势渐成为了运营商提供业务的首选平台。但是传统的IT安全防护手段不足以应对全IP网络所带来的挑战,使运营商面临着严峻的安全挑战。     

IPv6带来"始终在线"的IP通信,助您尽享无限通信自由

IPv6的出现使网络通信进入了一个崭新时代,使跨越多种固定或移动设备和网络的“始终在线”的IP业务梦想成真。然而,今天运营商所面临的最大问题之一是如何管理从IPv4到IPv6的过渡。分阶段演进路径为此应运而生,它支持两种协议无缝互通。     

爱立信通信新时代--IPv6带来“始终在线”的IP通信

IPv6的出现使网络通信进入了一个崭新的时代,使跨越多种固定或移动设备和网络的"始终在线"的IP业务梦想成真.但是,如何管理从IPv4到IPv6的过渡是运营商面临的最大的问题.为此,分阶段演进路径应运而生,它能够支持两种协议无缝互通.预计到2005年,企业和一般消费者用户的数量可能将超过10亿.     

IMS网络发展策略研究

随着国内电信运营商逐步成为全业务电信运营商,固网/移动网的融合、IP多媒体业务的提供逐步成为国内电信运营商网络建设面临的最大挑战.IMS(IP多媒体子系统)作为3GPP在Release 5版本所提出的支持IP多媒体业务的子系统,其特点是采用SIP(会话初始协议)、接入无关性以及对IP多媒体业务的支持.IMS注定会成为电...     

城域网中引入IPv6的方案探讨

作为一种新型的IP协议,IPv6协议在地址空间、安全能力和移动能力方面比传统IP协议有了很大的改进,已逐渐被人们接受成为下一代IP网络NGI的核心网络协议。另外,电信运营商在基于IPv4协议的IP网络上开展各种新型业务时,也面临着各种各样的问题需要解决,如NAT穿越、安全问题、移动能力差等,IPv6协议的引入为解决这些问题提供了新的思路和机遇。我国的下一代互联网CNGI工程也进入了部署阶段,如中国电信正在承建包括7个核心节点的一个CNGI主干网,这表明IPv6已从纯学术研究逐渐进入了商业试验阶段。     

新IP理念下的智慧运营新技术

智慧运营是新IP网络转型的关键特征之一,分析传统IP网络运维手段在应对云计算、大数据以及移动互联网等新需求中面临的挑战,提出云网融合带来的新需求和新技术是智慧运营的主要推动,结合对DevOps重要概念的解读,对IP网络智慧运营涉及的可编程网络、Netconf/Yang以及业务编排等新技术进行系统性分析和总结,为基础运营商向智慧运营转型提供技术建议.     

全业务运营环境下的IPRAN组网技术与部署方案研究

全业务运营对电信运营商网络转型提出了新挑战。文章以移动接入IP化承载为切入点,提出一种通过统一的IP网络实现全业务融合承载的解决方案,并经测试可提升业务的网络承载能力、灵活性和可扩展性,为电信运营商全业务运营网络承载提供参考。     

踏踏实实前进，做IP汇聚技术的领跑者——访阿尔卡特亚太区IP事业部总工程师刘永春

目前,电信运营商越来越注重用户数童和业务收益的同步增长,并在积极探索新的业务模式和收入增长点。在这个过程中,他们面临的最大的挑战是扣何保证业务收入的持续增长一个开放的,能够支持各种新业务的承载网是解决这个问题的关健,本着最新的路由发展技术和设计理念,结合多年来时电信业务的理解和经验,上海贝尔阿尔卡特基于业务路由器和业务交换机的解决方案,是构建下一代多业务承载网络的首选平台。它能够帮助运营商伙伴,以最合理的性价比,向用户提供各种真正的运营商级的新业务,顺利实现向用户核心宽带演进为此,我们就IP承载网发展的有关问题采访了阿尔卡特亚太区IP事业部总工程师刘永春博士     

PTN力助运营商IP RAN建设步伐

1 引言 随着全业务运营,当前三大运营商网络的建设都将面临重大的挑战:一方面,业务多样化,承载网带宽弹性调度,对不同业务提供不同服务质量;另一方面,业务IP化趋势明显,业务承载力求高效率和低成本.     

Layer 3 VPN Services over IPv6 Backbone Networks: Requirements, Technology, and Standardization Efforts

Layer 3 virtual private networks (L3VFN) enable organizations to connect geographically dispersed sites to one another across the packet switched network of a service provider. The most popular form of L3VPN is based on BGP/MPLS (border gateway protocol/multiprotocol label switching) technology in which the service provider offers a network-based IP VPN routing and forwarding service to its customers across its own IPv4-based MPLS backbone network. With the deployment of IPv6-based backbone networks underway, there is an emerging requirement to support these same L3VPN services across a native IPv6 backbone network. This introduces a requirement to provide routing and tunneling of IPv6 VPN (and IPv4 VPN) packets across an IPv6 backbone network. Softwires is an Internet Engineering Task Force (IETF) Working Group chartered to address the requirement of providing a generalized, network-based, multi-address family, IP routing and tunneling capability across native IP backbone networks pursuant to IPv6 transitions. Elements of the softwires work can form the basis of an L3VPN over IPv6 solution. After providing a brief overview of how L3VPN works in various topologies, this article presents the requirements for L3VPN services over an IPv6 backbone network and discusses a possible solution set that builds over the softwire technology and related IETF standards. Finally, we outline future directions and how the softwire technology can support new services and improved scalability     

Deployment and test of IPv6 services in the VTHD network

This article presents the deployment and test of IPv6 services in the very high broadband IP/WDM (VTHD) [L. Thual, 2003] network for new-generation Internet applications. The VTHD project is partially funded by the French government through the French Research Network for Telecom (RNRT). VTHD supports both IPv4 and IPv6 services, and interconnects research centers and institutions in France. It has a public autonomous system number (AS20603) and a public IPv6 subnet. It is connected to the IPv6 global network via open transit (France Telecom's international IP service for ISPs). VTHD in France compares with Internet2 in the United States. This article focuses on the implementation of the IPv6 service, IPv6 performance (in the context of a high-speed network), the advantages of given technologies, and problems encountered. The following items are developed: VTHD architecture, IPv6 address space and aggregation, transition mechanisms, routing protocols, network test performance, IPSec test performance, naming (DNS), and network management.     

IPv4/IPv6转换网关的SNMP代理设计与实现

基于NAT-PT技术的IPv4/IPv6转换网关部署在IPv4/IPv6网络边缘,用于两网互通.对转换网关提供网络管理功能对保障两网互通有着重要意义.然而,网关所在网络业务流量的复杂性和其基于网络处理器的架构对网络管理的实现提出了挑战.本文提出了一种转换网关SNMP代理的设计方案,定义了NAT-PT MIB,实现了网络处理器环境下分布式MIB的采集并提供了对IPv4/IPv6两网内进行网络管理的支持.     

基于IPv4/IPv6协议转换技术的IDC过渡方案

由于IPv4地址的短缺,未来网络将向下一代IPv6网络过渡,并且由于IPv4与IPv6的差异,使得这两个网络之间无法互相通信。为在过渡期间,用户能够同时享受IPv4与IPv6两个网络的服务,运营商必须使用IPv4/IPv6网络过渡技术,以达到平滑过渡的目的。文章讨论在教育网中如何通过IPv4/IPv6协议转换技术使IDC机房从IPv4网络平滑过渡到IPv6网络的一个通信场景和解决方案。     

IPv4网络和IPv6网络互连技术

IPv6网络和IPv4网络并存是目前无法回避的事实,这种情况下,实现连接在IPv4网络上的终端和连接在IPv6,网络上的终端之问通信已成为十分迫切的事情,本文通过一个实例,详细讨论了通过NAT—PT实现IPv4网络和IPv6网络互连的机制,和连接在IPv4网络上的终端和连接在IPv6网络上的终端之间的通信过程。     

IPv6驻地网建设方案研究

本文通过对IPv6驻地网建设进行技术分析,结合具体的驻地网节点情况,得出了一套IPv6驻地网建设的方案.方案既不影响现有的IPv4网络业务,又可满足驻地网节点对IPv6网络业务的需求,同时还可使IPv4用户平滑升级到IPv6网络上,实现了驻地网吸纳业务和网络增值的作用.     

Building Traversing NAT IPv6 Tunnel Gateway System Relies on Netfilter/Iptable Framework

The transition from IPv4 to IPv6 is doomed to be a long process. The network Address translation （NAT） technology is used very popularly in IPv4 network to make up the shortage of network address. It is a desiderated problem to make the users behind NAT gateway to access to IPv6 networks. By studying the transition technology from IPv4 to IPv6 and introducing NAT technology in IPv6, a scenario is put forward through 6to4 tunnel The scenario is implemented and the gateway system＇s performance is analyzed.     

基于IPv4/IPv6混合网中BRT立体交叉网设计实现

结合NAT-PT和IVI技术实现了纯IPv4网络和纯IPv6网络的互通,同时为了实现IPv4/IPv6混合网络与IPv6网络间快速通信,提出了一种BRT立体交叉网系统模式。该模式在IPv6网络和双栈网络间搭建高架BRT快速IPv6通道,使IPv6通过BRT高架专用IPv6通道进行通信。实现了在实验网络中混合网络和IPv6网络快速通信,解决了由于IPv6在双栈网络中占用IPv4的通信通道,增加网络负担,影响网络通信问题。     

IPv6特色应用分析

虽然IPv6较IPv4有诸多优势．但是如果IPv6支持的应用仅仅是IPv4网络上的那些应用．那么向IPv6过渡的动力将会很小。实际上．除了支持IPv4上的应用之外．IPv6非常适合于拥有巨大数量各种细小设备的网络而不是由价格昂贵的计算机组成的网络，这些简单设备不仅仅是手机和呼机．还可以是RFID、家庭网络、网络视频监控，等等。探讨了目前可以预见的IPv6特色应用，如IPv6与RFID，IPv6与家庭网络、IPv6与三重服务、IPv6与移动、IPv6与VoIP、IPv6与WiFi和WiMax、IPv6与信息家电、IPv6与P2P游戏等。     

Transition to IPv6 in GPRS and WCDMA mobile networks

The limited size and structure of the Internet address space of IPv4 has caused difficulties in coping with the explosive increase in the number of Internet users. IPv6 is a feasible solution for the problems identified with IPv4. Efficient interworking between IPv4 and IPv6 is very important, because IPv4 networks and services will exist for quite a long time. The transition period will be lengthy, and network/terminal equipment supporting both IP versions will be needed during the transition period. Thus, IPv4 to IPv6 transition issues need special care and attention. The three main transition methods are dual IPv4/IPv6 stacks in network elements/terminals, tunneling, and translators in the network. Three transition phases from IPv4 to IPv6 can be identified. These phases are described. Different transition scenarios from the 2G/3G mobile network point of view are also analyzed. Finally, some conclusions are drawn, and some recommendations on the use of transition methods are given