基于TMN的ATM网络管理

ＡＴＭ已从一种标准和原型变成了下一代的变换技术，随着大量的ＡＴＭ交换机进入网络，迫切需要与之相应的ＡＴＭ网络管理技术。本文重点讨论了如何将计算机和电信方法综合用于ＡＴＭ网络管理，特别是ＳＮＭＰ和ＣＭＩＰ协议在ＡＴＭ网络中的应用。另外，本文也讨论了ＴＭＮ接口及其与ＡＴＭ的网络元素ＮＥ的通信方式。     

利用DWDM实现核心网络的光网络互联

光网络互联实现了综合ＩＰ、ＡＴＭ、ＳＯＮＥＴ／ＳＤＨ和ＤＷＤＭ技术的低成本网络。ＤＷＤＭ技术彻底改变了核心网络,在ＤＷＤＭ配置的第二阶段,ＩＰ路由器和ＡＴＭ设备直接连接到ＤＷＤＭ,省去了ＳＯＮＥＴ／ＤＳＨ和ＡＴＭ,降低了成本,简化了扩容。光网络互联多数利用了现有标准,但新技术、新网络元素的引入同多带来了互操作问题,因此必须建立开放的ＤＷＤＭ系统,这也将推动光网络互联标准的发展。     

4种IP骨干网传送技术及发展

本主要介绍和分析ＩＰ骨干网传送技术发展,着重阐述了ＩＰ ｏｖｅｒ ＡＴＭ,ＩＰ ｏｖｅｒ ＳＤＨ／ＳＯＮＥＴ,ＩＰ ｏｖｅｒ ＤＴＭ,ＩＰ ｏｖｅｒ ＷＤＭ的技术特点及其发展前景。     

北电业务接入复用器（NSAM）

ＮＳＡＭ既有ＡＴＭ的灵活性，又有ＳＯＮＥＴ传输的可靠性。作为一种经济实用的复用器，ＮＳＡＭ可应用于ＡＴＭ技术，并将双向视频、音频、电话和数据业务融为一体。拥有了它，用户和业务供应商便可享受新型的高级应用，并使其网络面对任何挑战都立于不败之地。     

IP over SONET和IP over ATM技术比较

简要介绍了ＩＰ ｏｖｅｒ ＡＴＭ和ＩＰ ｏｖｅｒ ＳＯＮＥＴ技术,如一般ＩＰ ｏｖｅｒ ＡＴＭ、局域网仿真、ＭＰＯＡ、多协议标记交换及ＩＰ／ＰＰＰ／ＳＯＮＥＴ等,并从协议开销、带宽管理、服务质量、地址和路由、多协议封装以及容错等几个方面对这两种机制进行了比较。最后,为网络管理员提供了部署这两种机制的几种相关方案。     

ITU—TSG13研究组1999年2月会议主要技术进展（中）

２主要技术进展２．６Ｂ-ＩＳＤＮ的资源管理（ＲＭ）Ｂ-ＩＳＤＮ的资源管理一直是设备制造商和运营部门非常关心的问题,各国积极参与,文稿内容丰富。原Ｉ．３７１建议已定义了４种ＡＴＭ传送能力（ＡＴＣ）,即确定比特率（ＤＢＲ）、统计比特率（ＳＢＲ）、ＡＴＭ块传送（ＡＢ     

B—ISDN和ATM与宽带通信业务

本文首先通过对宽带业务发展情况，ＡＴＭ标准，ＡＴＭ适配层的分析引出了ＡＴＭ对Ｂ－ＩＳＤＮ发展的作用及向Ｂ－ＩＳＤＮ过渡的步骤，并指出工发具ＳＭＤＳ和ＦＲ业务接口的ＡＴＭ交换机，对实现Ｎ－ＩＳＤＮ向Ｂ－ＩＳＤＮ过渡具有积极现实意义，其次介绍和分析了ＩＴＵ－Ｔ，日本ＮＴＴ及欧洲各国关于ＡＴＭ和Ｂ－ＩＳＤＮ的标准化活动，应用试验等情况。     

基于TMN的ATM网络管理模型

针对ＡＴＭ网络管理中特有的一些问题,结合ＴＭＮ的概念,提出了一种基于ＴＭＮ分层结构的ＡＴＭ网络管理模型。对它的信息模型、接口、协议和功能进行了分析。     

测试精品廊

ｉｎｔｅｒＷＡＴＣＨＡＴＭ／ＬＡＮ／ＷＡＮ分析仪ＩＭＡ功能测试选件宝隆大北ＧＮＮｅｔｔｅｓｔ的ｉｎｔｅｒＷＡＴＣＨ分析仪系统可以为您提供ＩＭＡ功能和性能测试。ＩＭＡ（ＡＴＭ反向复用）为运营商提供了低带宽ＤＳ１／Ｅ１服务和高速率、高成本ＤＳ３／Ｅ３服务之间的过渡解决方案。利用ＩＭＡ技术,用户可以通过配置多条ＤＳ１／Ｅ１线路使其具有单条ＡＴＭ高速链路的功能。经验证,制造商、服务供应商和大型用户可以正确运行ＩＭＡ系统,检测性能以及解决问题,在广泛的条件下,利用大量的测试（包括负面测试功能）来分析ＩＭＡ的运…     

Cisco的IP+ATM技术又有新进展──新型光学核心交换机进一步降低了提供宽带服务的成本

Ｃｉｓｃｏ系统公司最近宣布推出Ｃｉｓｃｏ　ＴＧＸ８７５０光学核心交换机，这是该公司全套ＩＰ＋ＡＴＭ解决方案系列的一部分，通过这些解决方案，服务提供商可向客户提供面向未来的高标准服务。Ｃｉｓｃｏ的ＷＡＮ核心解决方案通过标签交换实现了ＩＰ和ＡＴＭ技术的紧密结合，标签交换是新兴的多协议标记交换（ＭＰＬＳ）标准的初步实现，由此，在单一基础设施上提供共享动态带宽的ＩＰ与ＡＴＭ服务成了可能。ＴＧＸ　８７５０光学核心交换机完全符合ＭＰＬＳ标准，且具有分级专用网络到网络接口（ＰＮＮＩ）、ＳＯＮＥＴ／ＳＤＨ自动保…     

The Effects of Management Traffic on the Local Call Processing Performance of ATM Switches Using Queue Network Models and Jackson's Theorem

This paper considers a TMN‐based management system for the management of public ATM switching networks using a four‐level hierarchical structure consisting of one network management system, several element management systems, and several agent‐ATM switch pairs. Using Jackson's queuing model, we analyze the effects of one TMN command on the performance of the component ATM switch in processing local calls. The TMN command considered is the permanent virtual call connection. We analyze four performance measures of ATM switches—utilization, mean queue length and mean waiting time for the processor directly interfacing with the subscriber lines and trunks, and the call setup delay of the ATM switch—and compare the results with those from Jackson's queuing model.     

A Performance Analysis of TMN Systems Using Models of Networks of Queues,Jackson's Theorem,and Simulation

We analyze the performance of a telecommunications management network (TMN) system using models of networks of queues, Jackson's theorem, and simulation. TMN systems for managing public asynchronous transfer mode (ATM) networks generally have a four‐level hierarchical structure consisting of a network management system, a few element management systems (EMSs), and several pairs of agents and ATM switches. We construct a Jackson's queuing network and present formulae to calculate its performance measures: distributions of queue lengths and waiting times, mean message response time, and maximum throughput. We perform a numerical analysis and a simulation analysis and compare the results.     

TMN-based broadband ATM network management

ATM has rapidly transitioned from a standards and prototyping concept to become the next-generation switching technology used in products available on the market. With the rapid introduction of ATM switches into networks, there is an urgent need to manage them. The article discusses the telecommunication management network (TMN) interfaces being defined for management systems to communicate with ATM network elements (NEs) and other management systems. ATM management systems will have to communicate with ATM NEs in their jurisdiction using TMN interfaces. Networks will usually contain equipment from different suppliers. Thus, it is vital that there be standard management interfaces so that these different NEs can be managed. Some standard interfaces for ATM networks are defined, while others are being defined. The status of these interfaces is reviewed in the article. Communication between different networks is also needed, both between public networks and between public and private networks. Management personnel of one network need to exchange information with other networks for certain functions (e.g., initial service provisioning), and so management systems of different networks will exchange information through a combination of mechanized and manual interfaces. The status of these interfaces is also reviewed in the article     

网络管理体系结构立体模型及其应用的研究

给出了网络管理体系结构的定义及其要研究的问题,在TMN逻辑分层体系结构的基础上,提出网络管理体系结构立体模型并具体研究了它在基于ATM网络的VPN业务管理中的应用。     

TMN-based customer network management for ATM networks

Effective end-to-end management of today's globalized heterogeneous corporate customer networks, a mixture of ATM WANs and ATM LANs, is essential for customers at the cutting edge of technology. ATM WAN and ATM LAN management systems generally have different management policies and management information models. Studies on the customer network management system (CNMS) to realize end-to-end customer network management have thus adopted the telecommunications management network (TMN) interoperability concept, which is based on CNM manager and agent interoperation. This article proposes an end-to-end customer network management method that realizes interoperation. In order to realize configuration management, fault management, and performance management, the CNM agent extracts the information needed by CNMS from the ATM transport network operations system and controls the operations system accordingly     

一种基于CORBA和TMN结构的ATM网络管理模型

本文给出了一种基于CORBA和TMN结构的ATM网络管理模型。首先介绍模型的OS结构,并将ATM与其传输网SDH进行集成管理;其次定义了该模型在不同域之间交换信息的接口,即所谓的Xcoop。结果表明该模型能够实现分布式网络管理、保证宽带连接业务的端到端QoS,并且有故障管理和配置管理功能。     

基于TMN的ATM虚拟专用网(AVPN)管理

建立在 ATM网络之上的 ATM虚拟专用网 (AVPN)可提供话音、数据和图像等多种业务。为了提高 AVPN的运营效率 ,促进 AVPN的进一步发展 ,迫切需要一个开放的、标准的网络管理系统。文中以 TMN框架结构为背景 ,对基于 ATM网络之上的 AVPN的管理作了一些初步的讨论。     

ATM网络管理技术

描述宽带ＡＴＭ网络管理中ＴＭＮ分层，管理系统接口和管理信息库．     

ATM网中VPN业务管理的研究与实现

基于TMN的逻辑分层体系结构,提出VPN业务管理的体系结构,分析了体系结构中各个子系统的功能。在此基础上,提出VPN业务管理所需的管理信息模型及其与ATM网络层/网元层的管理对象的映射关系,并详细讨论了系统中的安全管理功能。