移动IPv6网络中的QoS及其实现探讨

由于移动环境的特殊性，使得在移动网络中提供服务质量（QoS）变得非常复杂。文章首先分析了基于RSVP的移动IPv6QoS解决方案，然后引入了一种新的IP通用信令体系——NSIS，并讨论了NSIS在移动IPv6网络QoS中的应用。     

IPv6部署对移动网络QoS影响分析

随着物联网的兴起和移动数据业务的增长,在移动网络中引入IPv6成为大势所趋。首先介绍了移动网络中Qos的架构,其次从终端、无线接入侧、核心网和外部承载网等方面对移动网络引入IPv6后给QoS所带来的影响进行了分析,提出了移动网络在向IPv6演进的过程中保障QoS需要注意的问题及方案,为在移动网络中引入IPv6提供了参考。     

移动IPv6概述

文章分析了IPV6支持移动性的优势，概述了移动IPv6协议，并对一些热点问题，如快速切换、平滑切换、移动管理、AAA和服务质量等进行了探讨。     

移动IPv6的关键技术及其应用

详细介绍、分析了移动IPv6的基本原理，说明了移动IPv6的基本工作流程，在此基础上进一步分析了移动IPv6的关键技术，讨论了移动IPv6关键技术中存在的问题及其未来应用。     

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。     

基于移动IPv6技术的无线城域网QoS研究

重点介绍了无线城域网中有关IPv6的QoS保证机制．为了提供端到端的QoS保证．除了需要在无线空中接口采用业务分类的动态业务流管理机制外．还需要在IPv6核心网络中采用能提供QoS保证的移动路由管理机制。并对各种支持移动性的InterServ、DiffServ和MPLS等QoS保证机制进行了研究和比较，建议在基于移动IPv6技术的无线城域网中采用扩展的MPLS机制进行核心网的QoS保证。     

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。     

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技术的研究与探索

IPv6技术支持的128位大地址空间不但能彻底解决移动IPv4地址枯竭的问题,而且比目前的移动IPv4有着更大的优越性和更为完善的设计理念.它的出现使移动通信有了更加广阔的发展空间,但该技术目前仍处于理论研究和实践探索阶段.原因是移动IPv6技术还有很多实际问题有待解决.     

移动IPv6与移动IPv4的技术优势比较

IPv4在设计之初并没有考虑到终端设备的移动性,所以连网设备移动时需要从互联网上断开,而在另外一个地方重新连接时,还需要重新配置系统的新的IP地址、正确的子网掩码和新的默认路由器(网关)才能继续通信。为了支持互联网上的移动设备,IETF推出了移动IP 的标准来使用户保留不变的永久IP地址,而不管他们是否连接在网上。移动IP有两种:一种是基于IPv4的移动IPv4, 一种是基于IPv6的移动IPv6。     

移动IPv6环境中集成RSVP信令机制

本文针对在移动无线IP网络中运行RSVP信令协议存在的问题，提出了一种把RSVP信令集成于Ipv6数据包头扩展字段的方案，以减少切换过程中资源预留路径建立的时间，为移动节点提供了服务质量保障。并将此方案和原始RSVP方案在资源预留时间和信令负荷方面进行了性能比较。     

Integrated Service Mobile Internet: RSVP over Mobile IPv4&6

While the Internet keeps its penetration into every facet of life and every corner of the globe, two things stand out. One is the hunger for high quality of services to convey audio and video data. The other is the desire for ubiquitous connections. Combining the two we have an Internet that is capable of supporting multimedia communications for nomadic users on the move. To have a high quality connection, resource must be allocated along the connection path. The current Internet standard for resource reservation is RSVP (Resource reSerVation Protocol), which is receiver-initiated and allows one-to-one or one-to-many communication to have resource reserved in the path from sender to receiver(s). To support mobile users, the Internet also has the mobile IP standard. Mobile IP allows a mobile host to roam from one subnet to another seamlessly. However, several problems need to be solved before we can support QoS communications for mobile users by applying RSVP to mobile IP. In this paper, we identify four problems related to RSVP over mobile IP. The problems are the resource pre-reservation problem, the RSVP tunneling problem, the common path identification problem, and the mobile proxy problem. We also survey the various solutions proposed by many papers.     

RSVP Extensions for Real-Time Services in Hierarchical Mobile IPv6

The Mobile IPv6 (MIPv6) provides many great features, such as sufficient addressing space, mobility, and security; MIPv6 is one of the most important protocols for next generation mobile Internet. Simultaneously, with the rapid improvement of wireless technologies, the real-time multi-media IP services such as video on demand, videoconference, interactive games, IP telephony and video IP phone will be delivered in the near future. Thus, to furnish accurate QoS for real-time services is one of the most important thing in the next generation mobile Internet. Although RSVP, which is a resource reservation protocol, processes signaling messages to establish QoS paths between senders and receivers, RSVP was originally designed for stationary networks and not aware of the mobility of MNs. Therefore, this paper proposes a novel RSVP extension to support real-time services in Hierarchical Mobile IPv6 (HMIPv6) environments. For intra-site mobility, the concept of QoS Agent (QA) is proposed to handle the RSVP QoS update messages and provide the advanced reservation models for real-time services. For inter-site mobility, IP multicast can help to invite inter-site QAs to make pre-reservation and minimize the service disruption caused by re-routing the data path during handover. Simulation results show that the proposed scheme over HMIPv6 is more suitable for real-time services than the famous RSVP tunnel-based solution.     

New architecture of IP QoS management system

Based on the analysis of current Quality of Service （QoS） management on IP network, new generation of QoS architecture QoSAF is proposed. QoSAF is divided into three layers： resource control layer, network service layer and business layer. QoS management is accomplished by interactivity of layers. In this architecture, mechanism of feedback control enhances the functions of resource management and system monitoring. The principle of design and logical architecture of system is discussed in detail.     

Enhancing Security in Mobile IPv6

In the Mobile IPv6 (MIPv6) protocol, a mobile node (MN) is a mobile device with a permanent home address (HoA) on its home link. The MN will acquire a care‐of address (CoA) when it roams into a foreign link. It then sends a binding update (BU) message to the home agent (HA) and the correspondent node (CN) to inform them of its current CoA so that future data packets destined for its HoA will be forwarded to the CoA. The BU message, however, is vulnerable to different types of security attacks, such as the man‐in‐the‐middle attack, the session hijacking attack, and the denial‐of‐service attack. The current security protocols in MIPv6 are not able to effectively protect the BU message against these attacks. The private‐key‐based BU (PKBU) protocol is proposed in this research to overcome the shortcomings of some existing MIPv6 protocols. PKBU incorporates a method to assert the address ownership of the MN, thus allowing the CN to validate that the MN is not a malicious node. The results obtained show that it addresses the security requirements while being able to check the address ownership of the MN. PKBU also incorporates a method to verify the reachability of the MN.     

QoS Negotiation and Renegotiation Based on Mobile Agents

The Quality of Service （QoS） has received more and more attention since QoS becomes increasingly important in the Internet development. Mobile software agents represent a valid alternative to the implementation of strategies for the negotiation. In this paper, a QoS negotiation and renegotiation system architecture based on mobile agents is proposed. The agents perform the task in the whole process. Therefore, such a system can reduce the network load, overcome latency, and avoid frequent exchange information between clients and server. The simulation results show that the proposed system could improve the network resource utility about 10%.     

Analysis of Fast Handover Mechanisms for Hierarchical Mobile IPv6 Network Mobility

When a mobile network dynamically changes its point of attachment to the Internet, the various types of movements by a mobile router require handovers, and network mobility (NEMO) is concerned with the management of this movement of mobile networks. Accordingly, this paper investigates the mobile router movement patterns in NEMO network environments, and defines fast hierarchical NEMO handover scenarios based on classified movement patterns. Due to unexpected link breakdowns during the handover procedure, the NEMO handover requires additional latency and packet delivery costs depending on when the breaks occur. For the various handover failure cases, it is also essential to analyze these overhead costs to evaluate and compare the performance of a fast handover. In this paper, the overheads associated with a NEMO fast handover include the latency, buffering cost, and packet loss cost, all of which are formulated based on a timing diagram.

移动IPv6 Bootstrapping研究

移动IPv6通过移动节点(MN)家乡地址绑定注册实现对移动性的支持,MN向家乡代理的注册必须提供家乡地址、家乡代理地址和家乡代理安全关联,移动IPv6基本协议假设以上信息总是存在于MN之上,并未考虑实际部署中的复杂情况。文中重点分析了该问题,把MN动态获得家乡代理注册信息的过程定义为Bootstrapping,考虑了MN在不同网络部署情况下的Bootstrapping,给出了一种可能的解决思路。