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未来骨干网同时承载巨大的IP流量和话音流量,需要新的流量工程解决方案,提高资源利用率,保证服务质量。本文首先介绍了MPLS和GMPLS,然后讨论用GMPLS解决流量工程问题的途径。 相似文献
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随着因特网业务的迅猛发展,流量工程技术正成为优化网络资源和提高网络性能的关键技术。本文介绍了流量工程的基本概念度其重要性,详细分析GMPLS对MPLS的路由协议和信令协议所作的流量工程扩展,并讨论了基于GMPLS网络中实现集成流量工程的可能性和优势。 相似文献
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GMPLS(通用多协议标签交换)是MPLS技术向光网络发展的产物。它有效地实现了IP和WDM光网络的无缝结合,是IP over WDM发展的一种趋势。本文主要介绍了GMPLS通用标签的特点及实现形式,LSP(标签交换路径)技术,以及链路管理协议LMP的特点及实现方法。 相似文献
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GMPLS技术及其路由算法 总被引:1,自引:0,他引:1
通用多协议标签交换( GMPLS)是由多协议标签交换(MPLS)发展而来,它是MPLS向光层扩展的必然产物.GMPLS将时隙、波长和光纤端口作为标签用子数据转发,通过采用扩展的信令、路由协议和新增的链路管理机制以适应对智能光网络进行动态控制和传送信令的要求,动态提供网络资源并增加网络的存活性.本文着重比较了GMPLS与MPLS,说明其如何改进MPLS,并提供了GMPLS在光控制平面的应用解决方案.最后,谨慎分析了GMPLS的前景及其需要解决的问题 相似文献
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介绍了基于GMPLS对等模型的智能光网络,阐述了GMPLS的协议栈结构和对MPLS的扩展,分析了GMPLS体系结构中的关键技术。 相似文献
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GMPLS与自动交换光网络 总被引:1,自引:0,他引:1
GMPLS(通用多协议标签交换)是MPLS技术向光网络发展的产物。它有效地实现了IP和WDM光网络的无缝融合,很好的满足了自动交换光网络控制面的需要。本文主要研究了GMPLS的接口类型和标签、自动交换光网络(ASON)的控制面以及GMPLS在ASON中的应用。 相似文献
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基于光GMPLS接入网中区分服务的QoS研究 总被引:2,自引:0,他引:2
通过配置区分服务体系实现基于光GMPLS环状网络的QoS测量,涉及到不同的实时多媒体服务.讨论并分析区分服务结构的三种服务级别的特性.仿真结果表明,在网络过载的情况下,快速转发类和保证转发类都有很好的保护作用.加速转发类适合于实时服务,而最大努力类对任何类型的服务}生能都非常低,同时保证转发非常适合于视频流. 相似文献
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现有传输网络的结构限制了数据业务的发展,迫切需要开发新技术以解决这个问题。GMPLS(通用多协议标签交换)是MPLS技术向光网络发展的产物。它有效地实现了IP和WDM光网络的融合,是IP over WDM发展的一种趋势。本主要介绍了GMPLS接口和通用多协议标签的特点及实现形式,LSP(标签交换路径)分级技术,以及双向LSP的特点及实现方法。 相似文献
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通用多协议标签交换,不仅支持实行分组交换的设备,也支持在时域,波长域和空间域进行交换的设备,GMPLS的发展需要对现有的MPLS的信令和路由作出修改,也产生了新的协议。 相似文献
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This article discusses a novel approach for realizing traffic engineering in the framework of new-generation multilayer networks based on the GMPLS paradigm. In particular, the proposed traffic engineering system is able to dynamically react to traffic changes while at the same time fulfilling QoS requirements for different classes of service. The proposed solution consists of a hybrid routing approach, based on both offline and online methods, and a novel bandwidth management system that handles priority, preemption mechanisms, and traffic rerouting in order to concurrently accommodate the largest amount of traffic and fulfill QoS requirements. The bandwidth resources of the network are effectively exploited by means of "elastic" utilization of the bandwidth. The main building blocks and operations of the system are reported, and the major advantages are discussed. 相似文献
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Performance analysis of a traffic engineering solution for multilayer networks based on the GMPLS paradigm 总被引:1,自引:0,他引:1
Iovanna P. Settembre M. Sabella R. Conte G. Valentini L. 《Selected Areas in Communications, IEEE Journal on》2004,22(9):1731-1740
This paper presents an integrated traffic engineering (TE) system for new generation multilayer networks based on the generalized multiprotocol label switching (GMPLS) paradigm, and reports the performance analysis of such a system. The proposed TE system aims at dynamically reacting to traffic changes and, at the same time, fulfilling quality of service (QoS) requirements for different classes of service. The proposed solution consists of a hybrid routing approach and a bandwidth management strategy. The former makes use of both off-line and on-line methods to accommodate traffic requests. The latter, based on an "elastic" use of the bandwidth, allows the handling of different priorities among data flows, possible preemptions, and rerouting. The proposed TE permits the accommodation of the largest amount of traffic, while guaranteeing good performance to mission-critical services. The main building blocks and the operations of the system are reported and the major advantages are discussed. The performance of the proposed system are compared with the ones relating to a reasonable alternative system based on overprovisioning, to highlight its advantages of in terms of traffic volume that can be accommodated for a given network infrastructure. 相似文献
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为了研究基于流量工程的自动交换光网络(ASON)路由协议,采用基于源标签交换路由(LSR)路由泛供、仅广播链路可用带宽的增减的方法,得到了该协议能使LSR根据准确的带宽信息和波长可用信息选择路由的结果.结果表明,当链路中每个节点信息负荷量较小时,该协议拥有最小的链路阻塞率;与传统的路由机制相比,它能减少4~7倍的控制开销. 相似文献
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K. Hendling Dipl.-Ing. G. Franzl Dipl.-Ing. K. Bengi Dipl.-Ing. Dr. techn. 《e & i Elektrotechnik und Informationstechnik》2004,121(6):239-242
The main goal of Internet traffic engineering is to efficiently optimize the performance of operational networks in order to avoid the well-known shortcomings of the typical destination-based IP routing. Traffic engineering attempts to reduce or even avoid congestion hot spots and to improve resource utilization across the backbone IP network. During the last years traffic engineering has become an inevitable tool concerning performance optimization in large Internet backbones. The core objective of this paper is to give an overview of the architectures and mechanisms for traffic engineering. 相似文献
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对于利润的要求迫使电信服务提供商不得不更加关注网络建设投入的回报率,更为直观地说,即网络资源的有效利用率。处于当前全球经济发展变缓、网络与通信行业备受打击的困境,只有那些能够有效利用网络资源的服务提供商才能得以生存。GMPLS(Generalized Multi-Protocol LabelSwitching )的出现为其在提高资源利用率、降低运营成本以及新业务的开发等多方面提供了技术实现手段。GMPLS简介GMPLS是在IP骨干网络的MPLS技术基础上发展而来的,其技术的标准化得到了互连网工作组IETF和光纤网络互连论坛OIF的大力支持。MPLS技术主要应… 相似文献