共查询到17条相似文献,搜索用时 78 毫秒
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本文首先介绍了QoS的概念模型,然后着重分析了QoS中RSCP(资源预留协议)在移动IP上存在的问题并提出了RSVP与移动IP结合的几种方案,在此基础上介绍了一种在移动IP上提供端到端的QoS机制。 相似文献
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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。 相似文献
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IP QoS研究的现状与发展趋势 总被引:4,自引:0,他引:4
目前,随着电信业务的引入,IP网的服务质量(IP QoS)成为下一代Internet的重要研究课题。由于IP协议的无连接特性和IP网络松散的控制管理方式,使这项研究面临很大的挑战。IPQoS的研究范围十分广泛,不仅包含路由和业务流量控制,还涉及到网络管理、计费和网络测量。当前主要的IP QoS技术集成服务(IntServ)集成服务的基本思想是在传送数据之前,根据业务的QoS需求进行网络资源预留,从而为该数据流提供端到端的QoS保证。资源预留协议(RSVP)是集成服务的核心。这是一种信令协议,用来通知网络节点预留资源。如果资源预留失… 相似文献
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1 简介 因特网上的多媒体应用日益增多,为了在网上获得实时业务服务质量(QoS)的保证,因特网运用了一些控制协议,它们和其它协议如路由协议、传输层以及较低层协议一起完成所要求的QoS性能。这些控制协议有实时传输协议/实时传输控制协议(RTP/RTCP)、RSVP等。本文对RSVP作一简述。 RSVP是资源预留建立协议的简称,它是为实施综合业务因特网设计的。当一主机在网络上应用数据流的服务质量有特殊要求时。可 相似文献
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IP QoS综合服务模型研究 总被引:2,自引:0,他引:2
本文讨论了一种资源预留和QoS控制模型。对该模型中的接纳控制、策略控制和调度算法进行了分析,并且讨论了模型的核心协议-资源预留协议(RSVP),从讨论中可以看到,该模型能在IP网上提供不同级别的QoS以满足不同的需求。 相似文献
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按互联网对时间的要求可分为:①非实时业务,指对数据包到达目的节点的时间或相邻数据包之间的到达间隔没有限制的业务。②实时业务,指那些对各个相邻数据包之间的时间间隔有严格限制的业务。由于IP是面向非连接的、无法保证可预测的时延,只能为高层协议提供非常初级的服务质量(Quality of Service)。虽然,用缓存技术可以处理一定的时延变化,但在某些业务中也无济于事,尤其是双向交互的业务。IETF提出使用RSVP(资源预留协议)为业务预约资源,以保障能在Internet上得到高的QoS。 一、资源预留协议RSVP RSVP协议是一个为应用程序预留资源的协议,它能为组播或单播的数据流提供由接收方发起的资源预留,希望通过业务与网络的协商,为实时业务预留资源,以提高实时业务的服务质量。 相似文献
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Architecture and experimental results for quality of service in mobile networks using RSVP and CBQ 总被引:3,自引:0,他引:3
Efforts are underway to enhance the Internet with Quality of Service (QoS) capabilities for transporting real‐time data. The
issue of wireless networks and mobile hosts being able to support applications that require QoS has become very significant.
The ReSerVation Protocol (RSVP) provides a signaling mechanism for end‐to‐end QoS negotiation. RSVP has been designed to work
with wired networks. To make RSVP suitable for wireless networks, changes need to be made by: (i) changing the way control
messages are sent, and (ii) introducing wireless/mobile specific QoS parameters that take into account the major features
of wireless networks, namely, high losses, low bandwidth, power constraints and mobility. In this paper, an architecture with
a modified RSVP protocol that helps to provide QoS support for mobile hosts is presented. The modified RSVP protocol has been
implemented in an experimental wireless and mobile testbed to study the feasibility and performance of our approach. Class
Based Queueing (CBQ) which is used as the underlying bandwidth enforcing mechanism is also modified to fit our approach. The
experimental results show that the modified RSVP and CBQ help in satisfying resource requests for mobile hosts, after handoff
occurs. The experiments also show how different power and loss profile mechanisms can be used with our framework. The system
performance using the modified RSVP control mechanism is also studied.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Yi Sun Yucheng Zhang Yilin Song Eryk Dutkiewicz 《Wireless Personal Communications》2011,60(4):769-807
In recent years, with the development of mobile communication technologies and the increase of available wireless transmission
bandwidth, deploying multimedia services in next generation mobile IPv6 networks has become an inevitable trend. RSVP (resource
reservation protocol) proposed by the IETF is designed for hardwired and fixed networks and can not be used in mobile environments.
This paper proposes a protocol, called Fast RSVP, to reserve resources for mobile IPv6. The protocol adopts a cross-layer
design approach where two modules (RSVP module and Mobile IPv6 module) at different layers cooperate with each other. Fast
RSVP divides a handover process with QoS guarantees into two stages: (1) setup of the resource reservation neighbor tunnel
and (2) resource reservation on the optimized route. It can help a mobile node realize fast handover with QoS guarantees as
well as avoid resource wasting by triangular routes, advanced reservations and duplicate reservations. In addition, fast RSVP
reserves “guard channels” for handover sessions, thus greatly reducing the handover session forced termination rate while
maintaining high performance of the network. Based on extensive performance analysis and simulations, Fast RSVP, compared
with existing methods of resource reservation in mobile environments, performs better in terms of packet delay and throughput
during handover, QoS recovery time after handover, resource reservation cost, handover session forced termination rate and
overall session completion rate. 相似文献
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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. 相似文献
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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. 相似文献
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Currently, the RSVP model, which is efficient resource reservation in the fixed endpoints, becomes invalid under host mobility. We investigate the problems of standard RSVP in providing real-time services in wireless mobile networks. We also observe carefully how to interoperate IntServ services over DiffServ networks, and how to map IntServ QoS parameters into a wireless link. We then identify the advantages and drawbacks of the existing RSVP proposals to support QoS under both micromobility and macromobility. We finally propose a dynamic resource allocation scheme for reducing service disruption of real-time applications due to frequent mobility of a host 相似文献
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Architecture for mobility and QoS support in all-IP wireless networks 总被引:14,自引:0,他引:14
Shou-Chih Lo Guanling Lee Wen-Tsuen Chen Jen-Chi Liu 《Selected Areas in Communications, IEEE Journal on》2004,22(4):691-705
Mobility management and quality-of-service (QoS) provisioning are the important tasks on the future development of wireless networks. The high host mobility makes these tasks more challenging. In this paper, we propose an architecture which supports both mobility and QoS management in Internet protocol (IP)-based wireless networks. In mobility management, the fast handoff, which the packets are forwarded in advance to the neighboring locations where a mobile node (MN) may move to, is provided to reduce the service disruption. Also, the fast location lookup, which the routing information about a MN is replicated to some routers, is provided to avoid the triangular routing problem incurred by the protocol of mobile IP. In QoS provisioning, we enable the end-to-end QoS guarantee by using the resource reservation protocol (RSVP) signaling. In particular, the RSVP aggregation technique is used to avoid the scalability problem. Also, the technique of passive resource reservation is used to reduce the influence of host mobility on the resource reservation delay. We emphasize the integration of mobility and QoS management in the architecture design. A performance analysis is given to justify the benefits of our proposed architecture. 相似文献
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HMRSVP: A Hierarchical Mobile RSVP Protocol 总被引:9,自引:0,他引:9
In this paper, we propose a hierarchical Mobile RSVP (HMRSVP) that can achieve mobility independent QoS-guaranteed services in mobile computing environments. The HMRSVP integrates RSVP with Mobile IP regional registration and makes advance resource reservations only when an inter-region movement may possibly occur. We first show that, by NS simulator, our HMRSVP can achieve the same QoS guarantees as MRSVP does with fewer resource reservations. Then, we show that HMRSVP outperforms MRSVP in terms of reservation blocking, forced termination and session completion probabilities. 相似文献