IPv6 Wi-Fi环境下终端行为测试研究

各运营商因缺乏必要数据,无法预估升级移动网络到IPv6后对用户体验造成的影响,因此未敢轻易推进。测试了当前各主流移动终端在IPv6 Wi-Fi网络环境下的行为特性,汇总数据后分析了影响用户体验的关键点,研究了移动互联网IPv6大规模推广的可行性。同时亦说明了整个平台的搭建步骤要点。测试研究结果表明,推广移动互联网IPv6的主要障碍是高占比操作系统和浏览器对IPv6支持不完善,影响网络互通导致用户体验下降。     

基于IPv6的移动数据网络发展探讨

IPv6在设计时充分考虑了移动需求,并将移动IPv6作为IPv6的基本组成部分,因此IPv6在移动环境下可更好地支持端到端以及多媒体业务.随着IPv6标准的成熟,移动网络中逐渐引入IPv6也成为通信网络的重要发展方向.本文首先介绍移动数据通信和IPv6技术的发展现状,然后探讨了在移动网络中引入IPv6的策略,并给出了3G网络环境下IPv6地址分配方式以及移动IP技术的发展现状,分析了移动IPv6协议的优点,列举了需要进一步研究的问题,最后给出了结论和建议.     

移动IPv6在无线局域网中的实现

介绍了移动IPv6的工作机制,提出一个移动IPv6和无线局域网(WLAN)集成的设计方案,以实现移动终端在无线局域网之间无缝切换,并建立实际的实验环境对移动IPv6进行测试.     

基于IPv6的移动互联网络研究与实现

移动IPv6支持主机在Internet上移动，但它并不支持任意一个网络在Internet上移动。快速增长的移动数据业务需求推动着IPv6（其是移动IPv6）和3G不断向前发展。文章介绍了移动IPv6的工作机制和移动IPv6中的关键技术，然后分析了移动Ipv6直接应用于移动网络所带来的问题，提出了一种对移动IPv6作一些改进来支持移动网络的方案。     

移动IPv6的嵌入式系统实现

分析了移动TPv6原理,在基于PXA270处理器的嵌入式系统平台上移植了对IPv6有良好支持的 Linux操作系统及图形系统,随后在WLAN环境下采用MIPL实现移动IPv6协议,搭建了移动IPv6试验床,测试了开发的嵌入式移动IPv6系统的性能.     

移动IPv6技术的研究及其在Linux环境下的实现

文章简介了当前移动IPv4和IPv6的研究情况,着重讨论在一个纯IPv6的环境下移动IPv6协议软件设计中的几个问题。     

移动IPv6技术的实验系统

介绍了移动IPv6的工作原理及目前在Windows、FreeBSD和Linux操作系统上开发出来的各种移动IPv6实验系统,并建立了实验环境,对Linux下的MIPL移动IPv6实验系统进行了测试。     

基于IPv6的移动终端的通信

分析讨论了基于IPv6协议的移动终端的通信.目前由于IPv4地址空间的短缺,基于IPv4的移动终端的通信效率受到了影响,限制了新业务的开展.使对基于IPv6的移动终端间的通信的研究显得更为重要.首先分析了IPv6对移动终端的支持和实现机制,然后研究了移动终端在IPv6环境下的通信实现,最后讨论了移动IPv6越区切换技术和安全性问题.     

扩展移动IPv6以实现网络的移动

本文在深入研究和分析移动IPv6工作原理的基础上,指出了移动IPv6只支持单个节点移动这一局限性,针对这一局限性,提出了扩展移动IPv6协议以实现网络的移动,并对这种网络移动机制的原理和实现做了详细的论述。     

移动IPv6技术研究的实验系统概述

本文介绍了移动IPv6的工作原理及目前在Windows、BSD和Linux操作系统上开发出来的各种移动IPv6实验系统,并建立了实验环境对Linux下的MIPL移动IPv6实验系统进行了测试。     

A Low Latency Handoff Algorithm for Voice over IP Traffics in the Next Generation Packet-Based Cellular Networks: Cellular Mobile IPv6

In the mobile communication environments, Mobile IP is defined to provide users roaming everywhere and transmit information freely. It integrates communication and network systems into Internet. The Mobile IPv6 concepts are similar to Mobile IP, and some new functions of IPv6 bring new features and schemes for mobility support. Two major problems in mobile environments are packet loss and handoff. To solve those problems, a mobile management scheme – the cellular mobile IPv6 (CMIv6) is proposed. Our approach isbased on the Internet Protocol version 6 and is compatible with the Mobile IPv6 standard. Besides, it also combines with the cellular technologies which is an inevitable architecture for the future Personal Communication Service system (PCS). In this paper, {Cellular Mobile IPv6 (CMIv6)}, a new solutionmigrated from Mobile IPv6, is proposed for mobile nodes moving among small wireless cells at high speed. This is important for future mobile communication trends. CMIv6 can solve the problems of communication break off within smaller cellular coverage during high-speed movement when packet-switched data or the real-time voice messages are transmitted. Voice over IP (VoIP) packets were chosen to verify this system. The G.723.1 Codec scheme was selected because it has better jitter resistance than GSM and G729 in a packet-based cellular network. Simulation results using OPNET show smooth and non-breaking handoffs during high-speed movement.     

移动IPv6技术

本文简要介绍了移动IPv6的基本概念和工作机制，在此基础上详细地介绍了移动IPv6中的关键技术。最后介绍了移动IPv6的一些应用。     

一种移动IPv6的切换优化方案

移动节点在两个不同子网之间移动时产生切换。移动节点的切换技术是保证实时业务服务质量的关键问题之一。目前比较经典的三种切换机制是快速移动IPv6、层次型移动IPv6和快速层次移动IPv6。在简单介绍了三种机制原理并分析了它们的不足后,提出了一种自适应移动IPv6切换时延优化方案。     

Analysis and Evaluation of Mobile IPv6 Handovers over Wireless LAN

In this paper, we analyze the IPv6 handover over wireless LANs. Mobile IPv6 is designed to manage mobile nodes movements between wireless IPv6 networks. Nevertheless, a mobile node cannot receive IP packets on its new point of attachment until the handover completes. Therefore, a number of extensions to Mobile IPv6 have been proposed to reduce the handover latency and the number of lost packets. We focus on Fast Mobile IPv6 which is an extension of Mobile IPv6 that allows the use of L2 triggers to anticipate the handover. We compare the handover latency in four specific cases: basic Mobile IPv6, the forwarding method of Mobile IPv6, the Anticipated method, and the Tunnel-Based Handover. The results of the handover latency are calculated with the L2 properties of IEEE 802.11b. In particular, we take into account the L2 handover for different configurations of the wireless network.     

一种基于移动IPv6协议的软切换实现方案

移动IPv6协议解决了IPv6网络中移动节点的位置更新和路由可达问题,使移动节点能够在不同IPv6子网间进行切换而不中断当前连接。但是这种切换的时延较长,影响移动IPv6网络的性能。为了减少切换时延,文章在移动IPv6协议中引入软切换技术,提出一种采用绑定更新计时器和路由优先级变换机制的软切换工程实现方案,实验结果表明,该软切换方案可以有效提高移动IPv6网络的性能。     

Seamless Support for Mobile Internet Protocol Based Cellular Environments

Cellular is the inevitable architecture for the Personal Communication Service system (PCS) in the coming future. Access to the Internet via cellular networks is expected to become an essential portion of future wireless service offerings. Providing seamless support for IP based packet switched services has become an important issue.The Internet Engineering Task Force's (IETF's) mobile IP protocol offers a standard solution for wide-area mobility at the IP layer. However, Mobile IP does not solve all of the problems involved in providing mobile Internet access to cellular users, especially during handoff period. Thus, IPv6 might be a good candidate to solve this problem.IPv6 is a new version of the Internet Protocol that was standardized by the IETF. It supports mobility and is presently being standardized by the IETF Mobile IP Working Group. At the same time, cellular is an inevitable architecture for the Personal Communication Service system (PCS).This paper introduces the current cellular support based on the Mobile Internet Protocol version 6. We will point out the short-falls using Mobile IP and try to emphasize protocols especially for mobile management schemes that can optimize a high speed mobile station moving among small wireless cells. A comparison between those schemes and future work will be presented.     

移动IPv6分层式路由管理模型的分析与研究

分层移动IPV6协议减少了注册延迟，但仍具有路由不够优化等问题。通过分析HMIPv6．提出一种基于分层机制的移动IPv6路由管理模型。该模型支持路由优化，能在域内、域间移动时实现快速切换以减少延迟．提高网络资源利用率。仿真分析结果验证模型的有效性．     

移动IPv6的安全性探讨

移动IP(Mobile IP)多应用于无线环境,除了要面对所有无线网络所固有的安全威胁外,还需要处理由移动性引入的新的安全问题,这必然导致移动IP相对于有线Internet显得更加脆弱。论文从移动IPv6的基本原理入手,分析移动IPv6存在的安全隐患及几种典型的攻击方法,并对其安全性进行了简单的探讨。     

基于无证书公钥的移动IP注册协议认证

移动IPv6是IPv6的子协议,有着巨大的地址空间、对移动性和QoS的良好支持,内嵌的IPSec协议,以及邻居发现和自动配置等诸多优势,它为未来的全IP移动通信系统提供了一个标准的全球移动性解决方案。针对移动IPv6技术的特点,将IPSec安全协议和无证书公钥体系（CL-PKC）两者结合起来,在分析无证书公钥的优缺点的基础上,提出了一种在移动IPv6环境下的注册协议认证与注册方案,并对该协议的性能进行了分析,以方便日后的改进。