共查询到19条相似文献，搜索用时 109 毫秒
1.
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。 相似文献
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针对现有的预测式FMIPv6(快速移动IPv6)没有提供域内乒乓切换机制,因而可能导致大量远程注册开销和系统通信开销的问题,在FMIPv6的基础上引入HMIPv6(分层移动IPv6)层次结构,提出了一种基于FHMIPv6(快速层次移动IPv6)的乒乓切换优化方案。分析结果表明,与FHMIPv6相比,所提方案在乒乓切换模式下能够有效减少时延和丢包率,进一步提高吞吐量。 相似文献
3.
对未来移动网络首选的移动Ipv6的工作原理作了详尽的介绍,在此基础上,对移动IPv6的各种切换方案作了深入的探讨,进而引入了类比于3G移动通信系统切换的思想,最后提出了移动IPv6切换的下一步研究方向。 相似文献
4.
移动IPv6网络中的切换策略研究 总被引：2，自引：0，他引：2
在未来基于IPv6技术的宽带移动网络中,移动主机的IP层切换策略是保证实时业务服务质量的关键问题之一。论文首先分析和比较了在Internet工程任务组(IETF)中三个主要的移动IPv6网络中的切换策略,在此基础上深入研究了将快速切换协议应用于分级移动IPv6网络的方案,并对此进行了仿真。仿真结果表明,该方案可以提高移动用户IP层切换的性能,能改善实时业务的服务质量。 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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切换技术是移动IPv6技术的关键技术之一,其优劣在很大程度上决定了MN在移动通信过程中的通信质量。本文介绍了移动IPv6的工作原理,阐述了移动IPv6切换的关键技术,以及三种切换的实现方式。 相似文献
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目前的无线局域网和3G网络都还无法满足人们对移动多媒体通信的需求。IEEE802．20——移动宽带无线接入(MBWA)工作组的目标是使高速移动的用户也能获得与有线链路相媲美的数据业务体验。为了支持网络层的移动性，MBWA系统中引入了移动IPv6技术。介绍了一种可以应用于MBWA系统的移动IPv6快速切换机制，此机制是对标准IPv6切换的改进，从而能够在最大程度上减小由于IP协议操作引起的切换时延。 相似文献
9.
一种减少移动IPv6切换延时的新方法 总被引：1，自引：0，他引：1
切换问题是移动计算环境中最基本的问题。理想的切换是指同时具备快速切换和平滑切换能力的无缝切换;快速切换就是要求系统具有最小的切换时延,平滑切换则要求系统具备最低的丢包率。现提出一种基于组播的平滑切换框架模型,该模型的基本思想是让移动节点本身携带途经的接入路由器绑定更新队列,每当移动节点到达一个新的链路并获得该链路的转交地址,就向家乡代理和队列成员进行组播。该模型有效地减少了数据包的丢失率,减少了延时,并与现有的快速切换/IPv6路由优化技术能很好地结合起来。 相似文献
10.
随着移动网络的迅速发展和IPv6技术的部署实施,各项基于移动网络上新的数据应用层出不穷。当移动节点在不同的子网间随意移动时,移动IPv6技术如何保障其正在通信的业务不中断,在网络层上完成平滑快速无缝切换,成为移动IP的关键技术之一。 相似文献
11.
This Letter proposes a scheme that supports a fast handover effectively in hierarchical mobile IPv6 networks (F‐HMIPv6) by optimizing the associated data and control flows during the handover. By NS‐2 simulation, we show that the proposed scheme can give better handover performance than a simple combination of existing schemes. 相似文献
12.
This paper proposes a fast handover mechanism to provide a seamless multicast service for Mobile IPv6 hosts. With the proposed
Fast handover based on a Mobile IP-Multi casting (FMIP-M) protocol, the selection of a new multicast service method, service
preparation, and initialization procedures are all performed during the fast handover period, thereby enabling a reliable
and efficient multicast service. When mobile hosts move to other networks, they can encounter data loss, out-of-synch problems
for multicast data, and multicast service exchange latency. Therefore, the proposed FMIP-M allows the new access router to
select a suitable multicast service method according to the multicast service-related network conditions and supports a reliable
multicast transmission by compensating for data losses from the previous access router. An analysis is conducted of the overheads
associated with a fast multicast handover, including the signaling cost and multicast packet-forwarding cost, where the costs
are formulated based on timing diagrams, and compared with a fast handover using Mobile IPv6. The performance analysis and
numerical results confirm that the proposed FMIP-M provides a fast multicast handover and reliable service with a relatively
small signaling cost and packet-delivery cost. 相似文献
13.
分层移动IPv6快速切换在一定程度上减少了切换延时，但切换过程中由网络层移动检测和使用重复地址检测（DAD）配置一个新转交地址引起的延时对实时业务仍然有很大的影响。为了减轻这些影响，文中提出了一种更加有效的快速邻居发现和DAD机制，减小了切换延时，提高了网络的性能。 相似文献
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James Kempf Ajoy Singh Jonathan Wood Atsushi Takeshita Nat Natarajan 《Wireless Networks》2006,12(3):321-344
The performance of the base Mobile IP handover algorithm for moving the Mobile Node’s network layer point of attachment from
one subnet to another has been recognized as a potential performance bottleneck for some time. In this paper, we discuss a
collection of algorithms that use a link synchronous approach to Mobile IP handover. In the link synchronous approach, information on the progress of switching the link is used
to drive handover at the IP level. We present a comprehensive analysis of handover packet drop, and develop analytical models
of how the link synchronous algorithms help to mitigate it. We use data from a handover emulator to test the analytical models,
and to compare the performance of the different algorithms under a variety of link conditions. Data from implementations on
IS-2000 and 802.11b show how the link synchronous algorithms behave on real radio protocols. The results indicate that the
link synchronous algorithms can reduce packet loss substantially, with best results possible if the link layer provides information
on the move prior to the link switch.
James Kempf is a Research Fellow at DoCoMo USA Laboratories. He holds a Ph.D. from the University of Arizona, Tucson, AZ. Previously,
James worked at Sun Microsystems for 13 years, and contributed to numerous research projects involving wireless networking,
mobile computing, and service discovery. James is a former member of the Internet Architecture Board, and co-chaired the SEND
and Seamoby IETF Working Groups. James continues to be an active contributor to Internet standards in the areas of security
and mobility for next generation, Internet protocol-based mobile systems.
Ajoy Singh is a Principal Staff Engineer at Motorola GTSS Division where he has led the development of radio network controllers and
the various components of core networks for 3GPP-based HSDPA and 3GPP2-based CDMA prototype systems. He holds a Master’s degree
from DePaul University, Chicago, IL. Ajoy is the co-developer of several pending patents on cellular radio technology, and
has contributed to the standardization of seamless mobility protocols through the Seamoby and Mobile IP IETF Working Groups
and through IEEE 802.21.
Jonathan Wood is an independent contractor and has been working with DoCoMo Labs since 2001. He is currently contributing to research on
next generation mobility and networking infrastructures. Previously at Sun Microsystems, Jonathan focused on Solaris networking
and 4G wireless network research.
Atsushi Takeshita is a Director at the NTT DoCoMo Multimedia Laboratories in Yokoska Research Park, Japan. Prior to that, he was Director of
the Autonomous Communication Laboratory in DoCoMo USA Laboratories, and one of the founding members of DoCoMo USA Laboratories.
Atsushi joined NTT DoCoMo in 1988 and has since been engaged in the research and development of multimedia information retreival
and delivery, the mobile Internet, and mobile terminal architectures. He is a member of the Association for Computing Machinery
(ACM) and Information Processing Society of Japan.
Nat Natarajan joined Motorola in 1993, and is a Fellow of the Technical Staff at Motorola. He received his Ph.D. from Ohio State University
in Columbus, OH. Prior to working at Motorola, Nat served as a research staff member for over 12 years with IBM Thomas J.
Watson Research Center, Yorktown Heights, NY, working primarily on packet switched data, voice and integrated networks as
well as wireless data and satellite networks, and he has been a major contributor to the IEEE 802.11 standard approved in
1997. Nat is a Motorola Distinguished Innovator, holding 30 patents, and is a Senior Member of IEEE. Nat’s current technical
interests are Beyond 3G/4G mobile networking systems based on IP technologies. 相似文献
16.
研究了移动IPv6协议中的越区切换问题,提出了一种基于特征投影的移动IPv6快速切换方法。该方法通过构造先验切换经验与小区覆盖范围的映射关系来协助移动接入网关对切换目的地进行预测。仿真结果表明,文中方法能够获得比FPMIPv6更小的切换延迟,并具有较好的鲁棒性。 相似文献
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XU Kai JI Hong YUE Guang-xin Telecommunication Engineering School Beijing University of Posts Telecommunications Beijing P.R. China 《中国邮电高校学报(英文版)》2004,11(Z1)
1 Introduction MobileIPv6requirestheMobileNode (MN)toregisterwiththeHomeAgent (HA)andtheCorre spondentNode (CN)whenitchangesitspointofattachmentintheInternet[1～ 3] .Therefore ,thiscauseMobileIPv6toincurlongdelayintheregis tration process,andaddsignalingtraffictothebackbonenetworkespeciallywhentheHAandCNarefarawayfromtheMN .Inordertominimizethisdelay ,andthesignalingoverhead presentinMobileIPv6,literatures[4～7] proposeHierarchicalMobileIPv6(HMIPv6)architectureandafasthan dover… 相似文献