共查询到19条相似文献,搜索用时 78 毫秒
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MPLS和移动IP结合技术是目前网络技术研究中的一个热点和难点,将MPLS与移动IP技术进行有机的结合,可以提高网络数据的交换传输速度,支持主机自由访问因特网,增强对QoS的支持,提高网络的安全性能.首先对移动IP技术和MPLS的基本工作原理进行了介绍,给出了基于MPLS标记交换路径的移动IP网络模型,提出多MPLS网络方案以及基于MPLS网络的IP路由优化方案,并对各方案的工作原理以及存在的问题进行了阐述,最后指出了需要进一步研究的问题. 相似文献
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在介绍移动IP技术和MPLS技术特点的基础上,提出了移动IP与MPLS的融事方案。利用MPLS的标记交换代替传统的IP转发,能降低传输开,提高移动IP的可扩展性,同时为MPLS提供移动性支持。 相似文献
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移动通信网络和IP网络的融合推动了电信产业的发展。在一个统一的IP网络平台上传输话音、数据、视频、图像将是大势所趋。目前针对移动用户的服务质量(QoS)要求,也正面临着很大的挑战。在移动IP网络中,由于用户的频繁移动使得端到端的QoS保证和移动切换(handoff)管理更加复杂。多协议标签交换(MPLS)技术作为借鉴了面向连接网络的优越性和实现流量工程的重要技术,为网络提供了较好的QoS保证。文章介绍了MPLS技术是如何应用在移动IP网络中,解决了诸如认证、QoS、流量工程等问题。 相似文献
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IP QoS中的综合业务和区分业务 总被引:1,自引:0,他引:1
IP QoS是现代互联网发展中的一项关键技术。IETF已经定义了几种体系结构以解决IP QoS的诸多问题。介绍了其中的两个主流体系结构:综合业务和区分业务,并提出将二者进行结合,从而为下一代互联网提供更好的IP QoS。 相似文献
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To provide a multicasting service, several multicast protocols for mobile hosts (MHs) have been proposed. However, all of these protocols have faults, such as non‐optimal delivery routes and data loss when hosts move to another network, resulting in insecure multicast data transmissions. Thus, this paper presents a new reliable and efficient multicast routing protocol for mobile IP networks. The proposed protocol provides a reliable multicast transmission by compensating the data loss from the previous mobile agent when a MH moves to another network. In addition, an additional function allows for direct connection to the multicast tree according to the status of agents, thereby providing a more efficient and optimal multicast path. The performance of the proposed protocol is confirmed based on simulations under various conditions. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
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Jen‐Yi Pan Wei‐Jen Lin Ting‐Wei Hsu Kai‐Fang Pan 《Wireless Communications and Mobile Computing》2010,10(3):394-404
IP paging is a well‐known topic, which focuses on reducing amount of binding update (BU). Various IP paging architectures rely on multicast/broadcast to send their messages in wireless network. However, multicast/broadcast is unreliable and has limited bandwidth in power saving mode. This paper uses unicast to avoid exhaustion of the limited bandwidth and reliably page mobile nodes (MNs) by layer 2's supporting acknowledgment in nature. Furthermore, we successfully suppress the amount of BU by remembering and checking MNs' ever attached on‐link care of addresses (LCoAs) in the stack, which is maintained by least recently used (LRU) algorithm for efficiently paging while MNs moving in a localized pattern. We simulate this mechanism to obtain the optimal stack size, which can dramatically reduce the signals of location update and paging. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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多协议标记交换(MPLS)技术是综合利用网络第二层交换技术的有效性和第三层IP路由的灵活性等优点而产生的多层交换技术。通过在传统的IP包里加入标记,使路由转发依赖于标记,大大地提高IP包的转发速度,同时可使传统IP网络具有服务质量(QoS)能力。现主要分析MPLS体系结构,指出MPLS的一些应用。 相似文献
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Current quality of service (QoS) routing schemes for low earth orbit (LEO) satellites IP networks either neglect the varying population density or fail to guarantee end-to-end delay. As a remedy, QoS routing protocol based on mobile agent (QoSRP-MA) is proposed. QoSRP-MA is a source-based routing protocol. Once connection requests arrive, QoS mobile agents are dispatched from ingress satellite to explore routes, which migrate using satellite routing tables. Upon arriving in egress satellite, QoS mobile agents migrate back towards ingress satellite to reserve bandwidth. To construct satellite routing tables, load balancing routing algorithm based on mobile agent (LBRA-MA) is presented. In LBRP-MA, at regular intervals mobile agents launched on all satellites migrate autonomously to evaluate path cost and update routing tables. Moreover, path cost between source and destination is evaluated considering satellite geographical position as well as inter-satellite link (ISL) cost. Furthermore, ISL congestion index is considered to update routing table. Through simulations on a Courier-like constellation, it shows that QoSRP-MA can achieve guaranteed end-to-end delay bound with higher throughput, lower connection failing ratio and signaling overhead compared to high performance satellite routing (HPSR) scheme. 相似文献
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