共查询到19条相似文献,搜索用时 437 毫秒
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移动IPv6切换技术 总被引:1,自引:1,他引:0
基本的移动IPv6切换时延太大,无法满足实时业务的要求。文章在分析了现有移动IPv6网络切换技术的基础上,提出了一种基于分层移动IPv6网络模型的快速切换方案F-HMIPv6。该方案实现了移动节点在不同移动锚点域移动的快速切换操作。从理论分析得出结论,该方案可以弥补现有移动IPv6网络切换技术中的一些缺陷。 相似文献
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移 动 IPv6 标准切换包括移动 节点的二层切换、路由发 现、重复地址检测(DAD)、家 乡代理绑定更新(BU)、通信节 点绑定更新这几个环节,在此期 间移动节点不能收发应用的 IP 分 组。在无线链路质量不佳,或者 家乡代理与移动节点距离遥远等 情况下,标准切换过程引起的分 组传输延时和分组丢失无法满足 实时业务的要求。 移动 IPv6 的快速移动切换 研究是当前的一个热点,IETF 对 此提出了移动 IPv6 快速移动切换(FMIPv6)草案。FMIPv6 利用移 动节点或网络的二层链路信息, 对移动切换事件进行预测或快速 响应,通… 相似文献
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快速层次移动IPv6切换性能分析及优化 总被引:1,自引:0,他引:1
移动IPv6技术中切换延时对实时应用影响很大。介绍了目前移动IPv6常用的快速移动和层次移动切换技术,描述其切换原理和过程。结合2种技术的优缺点,给出了一种新的快速层次移动IPv6的切换方案。利用NS-2对这3种切换方法进行仿真得到的结果表明,快速层次移动IPv6切换延时要小于快速移动IPv6和层次移动IPv6的切换延时,且降低了数据包丢失率,提高了网络的性能。 相似文献
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文章介绍了一种基于流的移动IPv6快速切换方法.即路由器利用IPv6的业务流的信息把各个业务流重定向到移动节点的新转交地址上.这种重定向的方式是在MN绑定更新注册的过程中进行的.使得移动节点在向家乡代理的注册还未完成之前.便能与通信对端进行正常通信,这样大大减少了切换时延.提高了切换效率.另外.本文通过理论分析.将此方法与常规的移动IPv6和分层移动IPv6机制进行了比较.并利用NS-2网络模拟器的仿真数椐对在此方法下不同类型的业务流的传输进行了分析,验证其具有较为良好的性能。 相似文献
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《信息通信》2019,(12)
随着互联网技术与移动通信技术飞速发展,移动IPv6技术已经成为下一代移动互联网的研究热点。切换技术是影响移动互联网实时运行质量的重要技术之一。低延迟、低丢包的无缝切换方案对移动IPv6的性能至关重要。层次移动IPv6(HMIPv6)利用移动锚点(MAP)降低了延迟和数据丢失。然而,只有移动节点在同一MAP域的网络上进行切换时,HMIPv6才能有效减少延迟。当移动节点在不同MAP域的网络移动时,其切换性能并不优于标准移动IPv6。文章针对层次移动IPv6提出了一种增强切换方案(EHMIPv6),该方案在HMIPv6的基础上实现并行重复地址检测(PDAD),以减少不同区域网络间切换的延迟。分析表明,该方案比HMIPv6具有更好的性能。 相似文献
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由于移动节点的位置是不断变化的,移动IPv6协议给出了支持移动节点的远程加入和双向隧道两种组播方法,但这两种方法都有各自的缺点.本文提出基于移动预测的快速分层移动组播体系结构(mobility prediction based fast and hierarchical mobile multicast architecture,简称MP-FHMM),通过移动预测,在切换前为移动节点配置好切换信息,并且在切换时使用基于FMIPv6改进的快速组播切换方法,有效减少了切换延迟以及由此引发的组播数据分组丢失.另外,由于采用层次型结构的移动组播管理,屏蔽了节点在子网内的移动,减少了因节点移动而重构组播树的频率. 相似文献
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A comparative performance analysis on Hierarchical Mobile IPv6 and Proxy Mobile IPv6 总被引:1,自引:0,他引:1
Jong-Hyouk Lee Youn-Hee Han Sri Gundavelli Tai-Myoung Chung 《Telecommunication Systems》2009,41(4):279-292
This paper presents comparative results on Hierarchical Mobile IPv6 and Proxy Mobile IPv6. The two mobility support protocols
have similar hierarchical mobility management architectures but there are, however, clearly different perceptions: Hierarchical
Mobile IPv6 has specific properties of a host-based mobility support protocol, whereas Proxy Mobile IPv6 is based on a network-based
mobility support protocol. Thus, it is important to reveal their mobility characteristics and performance impact factors.
In this paper, a cost based evaluation model is developed that evaluates the location update cost, the packet delivery cost,
and the wireless power consumption cost based on the protocol operations used. Then, the numerical results are presented in
where impacts of the various system parameters are evaluated. The results demonstrate that Proxy Mobile IPv6 always outperforms
Hierarchical Mobile IPv6 due to its ability to avoid the mobility signaling sent by the mobile host, and its reduced tunneling
overhead during communications with other nodes. 相似文献
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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. 相似文献
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改进的移动IPv6协议分析 总被引:4,自引:0,他引:4
在IPv4基础上发展起来的移动IPv6,比移动IPv4有很多优势,功能更为强大,更安全,必将在未来的移动互联领域发挥更大作用。但是当移动节点频繁移动时.标准移动IPv6协议会在网络中产生大量的注册报文,造成较大的注册延时,降低网络性能,因此有必要加以改进。本文介绍了两种改进的移动IPv6协议,并进行了详细分析。 相似文献
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Neng-Chung Wang Yung-Kuei Chiang Ji-Shuen Wong 《Wireless Personal Communications》2014,75(4):2181-2200
The research and development of next generation networks results in continuously growing in heterogeneity of wireless systems. Those systems also offer users the increasing possibility of roaming between different networks, which undoubtedly needs seamless integration. As mobile users continue to expand their requirements for seamless roaming, a good handoff mechanism is necessary especially for cellular networks and wireless local area networks. The most critical problem faced in the handoff mechanism is that users may need immediate data transmission. However, immediate data transmission is always obstructed because handoff latency occurs. In this paper, we propose a Hierarchical Mobile IPv6 handoff scheme using active measurement-foreign mobility agent to measure the residual bandwidth of each access point (AP) for handoff decision. As a result, the proposed scheme prevents whole efficiency from being affected by the registration time and improves immediate data transmission. In addition, a dual-threshold of the received signal strength is used to avoid the ping-pong effect. Simulation results show that the proposed scheme outperforms the traditional Mobile IPv6 and enhanced multilayer Hierarchical Mobile IPv6. 相似文献
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Huachun Zhou Hongke Zhang Yajuan Qin Hwang-Cheng Wang Han-Chieh Chao 《Mobile Networks and Applications》2010,15(4):530-542
This paper specifies a global mobility management architecture and protocol procedure called GPMIP, which is based on Proxy Mobile IPv6. In GPMIP, mobility management is performed by the network entity rather than individual mobile nodes. The benefit is the elimination of the wireless link data delivery tunnel overhead between a mobile node and the access router. To compare with the well known Hierarchical Mobile IPv6 mobility management protocol, the location update, packet delivery, and total cost functions generated by a mobile node during its average domain residence time are formulated for each protocol based on fluid flow mobility model. Then, the impacts of various system parameters on the cost functions are analyzed. The analytical results indicate that the proposed global mobility management protocol can guarantee lower total costs. Furthermore, a qualitative comparison between GPMIP and some other global management protocols is also investigated. 相似文献
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Mobile IPv6 is only adapted to the mobile’s movements within its own administrative domain. As Mobile IPv6 is expected to be the basis for beyond 3G networks, a solution for inter-domain security is required allowing the visited domain to authenticate any mobile to grant it access. As such, new concepts known as AAA for Authentication, Authorization, Accounting were defined by the IETF. The IETF is currently defining the Diametr protocol to support those three functions in a Mobile IPv4 environment. Today’s difficulty is to adapt the Diameter protocol to Mobile IPv6. After introducing the Mobile IPv6, IPsec and Diameter protocols, this paper presents our solution (IETF draft of December 2001), and an IETF alternative for adapting Diameter to Mobile IPv6. It gives a comparison and describes our prototype. 相似文献
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Handover delay performance is a critical issue to support real-time applications in wireless networks. To address this issue, this paper presents an Enhanced fast handover Triggering Mechanism (ETM) to improve the handover performance of mobile nodes (MNs) in Fast Proxy Mobile IPv6 (FPMIPv6). Making use of the information from the link layer, the ETM predicts two cases that the MNs perform in the reactive handover mode. Then, it establishes the bi-directional tunnel in advance for fast handover. As a result, the reactive handover delay is significantly reduced. Integrating the ETM into FPMIPv6 forms an enhanced Fast Proxy Mobile IPv6 (eFPMIPv6) protocol. Simulation experiments show that with the presented ETM mechanism, the eFPMIPv6 outperforms the original FPMIPv6 in terms of the overall handover performance. 相似文献
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In this paper, we propose and analyze DMAP-FR, a mobility and service management scheme with failure recovery (FR) control
in Mobile IPv6 systems. The basic idea behind DMAP-FR is to leverage access routers (ARs) running as regional mobility anchor
points (MAPs) as in Hierarchical Mobile IPv6 (HMIPv6) for mobility and service management for mobile nodes (MNs). However,
unlike HMIPv6, DMAP-FR allows the MAP of each MN to be determined dynamically based on the mobility and service characteristics
of the MN and the failure behavior of ARs with the goal to minimize the network traffic. DMAP-FR incorporates fault tolerance
mechanisms to allow the system to quickly recover from AR and MAP failures. We identify the best dynamic regional area size
for the selection of MAP for each MN such that the overall network traffic due to servicing mobility, service and fault tolerance
related operations is minimized. We demonstrate that DMAP-FR outperforms HMIPv6 for the same AR failure rate. 相似文献