基于GMPLS的光突发交换网络的研究

文章基于通用多协议标签交换(GMPLS)的光突发交换(OBS)网络的体系结构,研究了如何将GMPLS引入OBS,并使两者能够高效协调地工作.重点讨论了GMPLS与OBS技术相结合的网络(GMPLS-based OBS)的各种关键技术和解决机制.特别在处理突发数据包(BDP)冲突竞争机制上提出了新的方法.最后,指出了GMPLS-based OBS进一步研究的方向.     

GMPLS技术及其路由算法

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     

GMPLS与自动交换光网络

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。     

基于GMPLS的自动交换光网络智能OXC设计

自动交换光网络(ASON)是一种能够自动完成网络连接的新型网络;GMPLS(通用多协议标签交换)是IETF提出的可用于光层的一种通用多协议标签交换技术,是由MPLS扩展而来的。本文主要是从软硬件方面设计了一个基于GMPLS的满足自动交换光网络控制面要求的智能OXC节点,并探讨了仿真方案,通过仿真可以验证它的功能。     

电信辞库

通用多协议标签交换通用多协议标签交换(GMPLS)是一种在多协议标签交换(MPLS)的基础上发展起来的通用控制平面协议规范。GMPLS对MPLS流量工程(MPLS-TE)进行了扩展，使得它不仅适用于包交换，还适用于时分交换(如SDH/SONET、PDH)、波长交换以及空间交换。在GMPLS中，还提出了一些例如双向标签交换路径(Bi-directionalLSP)、链路绑定(LinkBundling)和LSP层次(LSPHierar鄄chy)等新的概念。GMPLS体系结构涵盖了为多种光虚拟专用网光虚拟专用网(OVPN)是指不用建设专用的网络，利用一些控制和管理技术，将光网络中的某一…     

基于对等模型的新型光因特网技术

文章简述一种新的组网技术———对等模型,它为光因特网的实现提供一种新的方式。通用多协议标签交换(GMPLS)支持对等模型网络,GMPLS技术和路由机制是构建对等模型光因特网的关键技术。     

GMPLS--智能光网络的核心技术

GMPLS是MPLS向光网络扩展的产物,能支持分组交换、时分交换、波长交换和光纤交换,它实现了IP和WDM光网络的融合,很好地满足智能光网络控制面的需要.对GMPLS的标签、层次化LSP、路由与寻址、信令和链路管理等方面加以分析,最后对GMPLS的意义进行了概括.     

基于GMPLS的多层多域智能光网络若干关键技术研究

在信息技术发展中,各种宽带数据信息量得到了爆炸式增长,而光传送网也在逐渐向着大规模、智能化的方向发展。文章通过对GMPLS(广义多协议标签交换)进行分析,并结合实际对以GMPLS为核心的多层多域智能光网络关键技术提出个人观点,希望为关注基于GMPLS的多层多域智能光网络技术的人群提供参考。     

基于GMPLS的IP over WDM

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。     

下一代光传送网:自动交换光网络

为适应网络动态化的要求,国际电信联盟标准化组织(ITU-T)提出了自动交换光网络(ASON)的概念.文章对ASON的网络总体结构、控制层面组成、控制协议及其与广义多协议标签交换(GMPLS)结构的关系作了概要的描述,并对ASON和光互联网进行了比较.     

GMPLS-IP层与光层融合的核心技术

GMPLS是MPLS向光网络的扩展，文章在简要介绍了MPLS技术的基本思路之后，主要介绍了将IP层与光层融合起来的GMPLS技术，包括GMPLS中的标签、路由与寻址、信令、链路管理等内容。     

Photonic MPLS Internetworking using an Optical Code Label Stack

Generalized multiprotocol label switching (GMPLS), which enables dynamic optical path provisioning, is promising. However, the critical issues of GMPLS in the optical domain are the data granularity of a wavelength and the very exiguous label space. The capacity of a single wavelength path may be sometimes too large to accommodate the traffic between edge node pairs, and the label space may be too small to assign the labels to each packet or flow. To solve the granularity and label space issues, optical code MPLS (OC-MPLS) is proposed. In this paper, OC-MPLS internetworking is introduced and experimentally demonstrated. One of the key techniques is photonic label processing of a label stack attached to a single packet or flow. The proposed method performs routing of packets or flows for interconnected OC-MPLS networks depending on the attached label stack in an all optical manner.     

Optical CDMA for All-Optical Sub-Wavelength Switching in Core GMPLS Networks

Generalized multi-protocol label switching (GMPLS) is a multipurpose control-plane paradigm that extends the MPLS scheme allowing switching without recognizing packet boundaries. In this paper, we present a novel extension that exploits a new physical layer for switching in optical GMPLS. The proposed extension is achieved through adding an optical code switching layer, or code switch capable (CSC) layer, to the existing label mapping layers. Our proposal enables finer granularity at sub-wavelength level in all-optical GMPLS core switches, resulting in significant enhancements to traffic isolation capabilities for all-optical GMPLS core switches. We employ mathematical analysis to derive performance bounds for the proposed scheme, from both the labeling capacity and network throughput points of view. We use our analytical model to derive several optimum operating points for the network, and show that our techniques significantly improve the overall performance of all-optical core networks     

基于GMPLS的OBS网络技术

GMPLS(通用多协议标签交换)是MPLS技术向光网络发展的产物。描述GMPLS和MPLS控制平台的区别,介绍引用GMPLS协议作为控制平面的OBS网络。提出的网络结构是在OBS的突发控制包中用通用标签代替源节点和目的节点地址,并使用GMPLS协议栈对路由协议、信令功能以及链路管理协议进行增强和扩展以便更好地支持OBS网络。     

广义多协议标签交换GMPLS

未来的光传输网将由下列网络单元组成：路由器、交换机、DWDM系统、ADM、光交叉连接设备（OXC）等。为使由这些网络单元组成的网络具有很好的鲁棒特性,IETF的IPO工作组提出用广义的多协议标签交换（GMPLS）业动态地配置资源,充分利用保护和恢复技术提高网络的生存性,GMPLS将时隙、波长和光纤端口作为标签用于数据传发,由于各标签之间对应的数据粒度不同,GMPLS采用扩展的MPLS信令和路由来转发标签并建立相应的标签交换路径。     

A novel IP with MPLS over WDM-based broad-band wavelength switchedIP network

This paper presents a new technology for constructing IP over photonic systems. An IP with multiprotocol label switching (MPLS) over wavelength division multiplexing (WDM)-based broad-band IP network architecture and protocol is proposed and analyzed in this paper, which supports variable-length IP-like optical packet label switching and optical virtual path routing. This system tries to merge into one layer the functionalities of the wavelength switching, SONET mux/demux, and IP routing, and is sometimes known as the concept of optical MPLS. The label banding, forwarding/switching process, and node architecture of the proposed network are discussed and studied. A unique as well as important function of a lambda/label edge router (LER) is a flow assembly device that can encompass MPLS' forward equivalence classes, label stacking, and label switching path aggregation function. At the same time, a particular function of the core label switching router is wavelength merging. A fiber delay line is used to delay the data stream in order to process the label information and resolve contention. Transmission bit error rate measurements of the baseband data stream and back-to-back is also demonstrated to show its feasibility     

Demonstration of the highly reliable Hikari router network based on a newly developed disjoint path selection scheme

Integration of multiprotocol label switching functions and multiprotocol lambda switching functions can enhance the throughput of IP networks and remove bottlenecks that are derived from electrical packet processing. To enhance the packet forwarding capability, NTT proposed a photonic MPLS concept that includes MP/spl lambda/S, and demonstrated IP, MPLS, and photonic MPLS integrated router systems called the photonic MPLS router. This router system is now called the Hikari router. The word Hikari is Japanese meaning beam, light, lightwave, optical, photonic, and sunshine. The amount of IP data traffic has grown remarkably. Massive IP routers and flexible route control mechanisms are now required to cope with the increased amount of traffic. The Hikari router can offer two solutions utilizing photonic switching technologies, and photonic network operation and management technologies. The first solution is utilizing photonic switching technologies realized using optical-switch-based crossconnect systems. The other solution is realized using the MPLS and MP/spl lambda/S signaling protocol and photonic network protection functions. In this article we report on the implementation of the Hikari router systems, propose a newly developed disjoint path selection scheme for generalized MPLS networks with shared risk link group constraints, and demonstrate the signaling protocol and network protection functions. The demonstration system achieves a distributed optical path set-up/tear-down protocol with an extended constraint-based routing label distribution protocol. Fast self-healing through automatic protection switching and a new restoration scheme are also implemented. These functions are successfully implemented, and the performance is verified on a demonstration network. The protection switching scheme achieves protection in less than 20 ms, and the optical path restoration scheme achieves restoration in less than 500 ms.     

Signaling and Control Procedures Using Generalized MPLS Protocol for IP over an Optical Network

This paper reviews the existing research activities on signaling and control procedures for IP over optical networks. We focus on the IP‐centric signaling and control architecture based on the generalized multi‐protocol label switching (GMPLS) protocol and analyze various scenarios and technical issues for deploying the IP over an optical network. We analyze the signaling and operations and administration and maintenance requirements for integrating an IP network and an optical network in order to cope with the high bandwidth and poor resource granularity of the optical network, including the optical cross‐connect system. On the basis of network architecture and a reference configuration model, we investigate the GMPLS‐based control architecture and interconnection model appropriate for controlling IP bandwidth and optical lambda resources. The signaling and control procedure based on GMPLS on optical user‐network interface and network‐network interface are comparatively investigated to provide the optical lightpath. We also study protection and restoration procedures to protect link failure when it applies to GMPLS signaling.