ATM网络管理的TMN实现

电信管理网（ＴＭＮ）是目前国际上比较成熟的网络管理技术,我们公用网上的管理网络技术确定了走ＴＭＮ的技术路线,ＴＭＮ已成为当前人们的关注的一个热点,本文主要是从ＡＴＭ论坛的ＯＳＳ观点出发,结合ＩＴＵ－Ｔ的ＴＭＮ标准,阐述了ＡＴＭＴＭＮ管理的一些要点。     

OMC-NMC接口解决方案

１电信管理网网络结构在ＩＴＵ ＴＭ．３０００系列规范中 ,定义了电信管理网络（ＴＭＮ）的网络体系结构。整个体系结构基于ＯＳＩ的标准之上 ,为执行网络管理任务和网络通信提供了有效且标准的工作模式。它按照网络管理的功能分层 ,形成了一个金字塔形的分层结构 ,如图１所示。图１电信管理网络（ＴＭＮ）层次结构图从图１中可以看出 ,ＴＭＮ结构自下到上共有五个层次 ,分别是 :网元层、网元管理层、网络管理层、服务管理层和事务管理层。ＴＭＮ具有多厂商、互操作性能、可扩展性、可伸缩性和面向对象等优点 ,同时ＴＭＮ还使用面向对象的…     

国际动态

第三代移动通信大步迈向世界标准化目标１９９９年９月间,ＩＴＵ（国际电工联盟）在日内瓦主办了一次有关标准制定组织参加的讨论会,以细化和协调ＩＭＴ———２０００无线电接口标准的详细规范的最终编制问题。参加这次讨论会的组织有日本无线电工商业联合会（ＡＲＩＢ）及电信技术委员会（ＴＴＣ）、韩国电信技术联合会（ＴＴＡ）、美国的电信工业协会和ＡＮＳＩ的Ｔ１委员会、以及欧洲电信标准研究所（ＥＴＳＩ）。ＩＴＵ打算使第三代全球标准“一步到位”,以确保ＩＭＴ———２０００无线电标准满足全世界行业的需要,尽可能地供其他组织…     

UMTS——第三代移动电话网方案

主要电信运营商阿尔卡特、Ｂｏｓｃｈ、Ｉｔａｌｔｅｌ、摩托罗拉、北电和西门子已宣布他们支持第三代移动电话网———通用移动通信系统（ＵＭＴＳ）的一个解决方案,这种ＵＭＴＳ方案组合了ＴＤＭＡ（时分多址）和ＣＤＭＡ（码分多址）技术的优点。在塞浦路斯岛召开的ＧＳＭ-ＭｏＵ（ＧＳＭ协商备忘录）会议上,电信运营商讨论了已由ＥＴＳＩ（欧洲电信标准协会）讨论过的这些标准的目前提案。这种ＧＳＭ１８００／１９００ＭＨｚ频段范围和新的２ＧＨｚ频带都可部署的组合方法,不仅给现有经营者提供投资保护,同时也给新经营者提供巨大的市…     

TMN(电信管理网)

ＴＭＮ（电信管理网）张雄伟（通信工程学院南京２１００１６）ＴＭＮ，即电信管理网，是英文ＴｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓＭａｎａｇｅｍｅｎｔＮｅｔｗｏｒｋ的缩写，ＴＭＮ是ＣＣＩＴＴ（现ＩＴＵＴ）为适应现代通信网综合、宽带等特点而提出的一种新型的管...     

智能增值业务平台TeleServer^TM

ＵＴ斯达康（中国）有限公司利用ＣＴ技术开发的高度集成的综合信息系统－－ＴｅｌｅＳｅｒｖｅ＾ＴＭ智能增值业务平台，采用多样化的信息处理方式，为电信，邮政，金融等公众服务行业提供基于公共电话网（ＰＳＴＮ）和移动通信网（ＰＬＭＮ）的灵活多样的增值服务业务。     

INTERNET与OSI网络管理体系之比较

本文首先介绍了现代网络管理标准及网管思想，然后重点从管理信息结构（ＳＭＩ）、管理协议及公共管理功能三方面对比了当今两大网管体系：基于ＳＮＭＰ的ＩＮＴＥＲＮＥＴ网管体系和基于ＣＭＩＰ的ＯＳＩ网管体系。电信管理网（ＴＭＮ）全面采用了ＯＳＩ的网管体系。随着网络复杂度的不断提高，人们会越来越重视ＴＭＮ和ＯＳＩ。相信不久的将来基于ＴＭＮ和ＯＳＩ网管产品会非常流行。     

SONY DSR—30P DVCAM录像机

１　磁带本录像机使用标准ＤＶＣＡＭ或Ｍｉｎｉ－ＤＶＣＡＭ磁带。２　菜单设置·按ＭＥＮＵ（菜单）键,再按ＣＵＲＳＯＲ（光标）的↑／↓键,选定ＳＥＴＵＰＭＥＮＵ（菜单设置）后,按ＥＸ－ＥＣＵＴＥ（执行）键,进入菜单设置：（１）Ｌ１ＩＮＶＩＤＥＯ（１路输入视频）·Ｓ当Ｓ端和复合端都接有信号时,若要选择Ｓ视频信号,则设置到Ｓ的位置。若只有复合端接有信号,则自动选择复合视频。·ＮＯＲＭ当Ｓ端和复合端都接有信号时,若要用复合视频信号,则选择ＮＯＲＭ项。（２）ＡＵＤＩＯＭＯＤＥ（音频模式）·１６当设置到１６时…     

有线接入技术应用分析

根据ＩＴＵ－ＴＧ．９０２标准的定义,所谓接入网是指连接用记和业务节点的一部分电信网络,用户通过用户－网络接口（ＵＮＩ）与它相连,它通过业务节点接口（ＳＮＩ）与业务节点（ＳＮ）相连,并通过Ｑ３接口与电信管理网络（ＴＭＮ）相连。文章结合业务与市场需求,分析了上前各种有线接入技术的技术特点,根据ＦＴＴＢ,ＦＴＴＣ,ＦＴＴＣａｂ和ＦＴＴＺ的不同方式,分别讨论了各种有线接入技术在接入网发展的重点技术。     

未来电信网的基础标准简介：综合业务数字网和智能网的结构标准

简介了原ＣＣＩＴＴ拟定的电信网的基础标准，综合业务数字网（ＩＳＤＮ）的基本结构，与宽带综合业务数字网（Ｂ－ＩＳＤＮ）、专用电信网等连接的参考结构；电信管理网（ＴＭＮ）标准的拟订，与一般电信网的关系；智能网（ＩＮ）标准的拟订，ＩＮ的特点和概念性模式（ＩＮＣＭ）。     

无线Mesh网络与IEEE802系列标准

无线宽带接入系统发展迅速,但带宽容量低、覆盖范围小等缺点限制了它的进一步发展。作为“最后一公里”宽带无线接入非常重要的技术之一。无线Mesh网络（WMN）可以和多种无线网络系统,如无线局域网（WLAN）、无线个域网（WPAN）以及无线城域网（WMAN）等相结合,改善无线网络的性能,提高网络的覆盖范围。随着无线Mesh网络技术的厂泛应用,IEEE802的相关标准组正在致力于推动WMN技术的发展,制订相关的技术标准。目前,WMN标准已经出现在IEEE802．11s、80215、802．16、802．20中。     

多业务传送平台中数据承载新技术

城域网内分组业务占用的带宽资源已远远超过了传统的语音业务.多业务传送平台(MSTP)作为一种新的城域网解决方案可以解决对分组业务支撑能力不足的问题.文章分析了被应用在新一代多业务传送平台中的新的协议和标准:通用成帧规程(GFP)、虚级联(VC)和链路容量调整规程(LCAS),认为将GFP、VC和LCAS技术与可靠的SDH平台结合,使传统的SDH可以较为完美地承载数据业务,为SDH带来新的发展机遇,也使MSTP成为城域网最佳解决方案之一.     

广播电视网络的监控与管理

阐述建立网管系统的必要性和迫切性,介绍ISO网管标准的5大管理功能以及网管协议——简单网络管理协议(SNMP)和公共管理信息协议(CMIP)。     

The ISO reference model entities

The functionalities and presently defined entities at the different levels of the Open Systems Interconnection reference model are discussed. An overview of standards activity by the International Organization for Standardisation (ISO), the Institute of Electrical and Electronics Engineers (IEEE), and the International Consultative Committee for Telephone and Telegraph (CCITT) is given. The ISO reference model and layer functions are described. Standards for the different layers are examined. Network security and naming and addressing issues, which were not covered by the basic reference model and earlier standards activities, are addressed. Two private-sector examples of OSI networks, the Manufacturing Automation Protocol (MAP) and the Technical Office Protocol (TOP), are considered     

3G WCDMA网络共享的关键技术

基于3GPP标准中网络共享的最新研究进展,文章介绍了3G WCDMA网络共享的4种解决方案:站点共享、公共共享网络、地理分割网络共享、无线接入网共享,对Release5中的lu-Flex功能、Release5中连接模式下的UTRAN共享机制和Release6中的网络共享支持增强机制等网络共享的关键技术进行了分析.     

North American agreements on ISDN

The work of the North American Integrated Services Digital Network Users Forum (NIUF) is presented, and its relationship to the Accredited Standards Committee T1 and other standards bodies is discussed. The role of the NIUF within the ISDN arena is evident when considering the Federal Information Processing Standard (FIPS) for ISDN and the Transcontinental ISDN Project (TRIP), both of which are described. The relationship of the ISDN FIPS to the Government Open System Interconnection Profile (GOSIP) and the military standard on ISDN are also discussed. A comparison of NIUF agreements/ISDN standards and the Bellcore NI-1 specifications is presented     

Intelligent network overview

The International Consultative Committee for Telephone and Telegraph (CCITT) program of work that addresses global international intelligent network (IN) standards and a framework for the standardized evolution of IN are described. Bell Communication Research's (Bellcore's) IN work, referred to as the Advanced Intelligent Network (AIN), is also discussed in relation to the CCITT IN Recommendations. In addition, IN activities of the European Telecommunications Standards Institute (ETSI) and the Telecommunications Technology Committee (TTC) of Japan are described     

Integrity of public telecommunications networks

Provides an overview of the special issue of the IEEE Journal of Communications, Volume 12, Number 1 (January 1994) which addresses open questions in network integrity, reliability and survivability. Current progress in this area is discussed. The questions addressed include user survivability perspectives on standards, planning, and deployment; the analysis and quantification of network disasters; survivable and fault-tolerant network architectures and associated economic analyses; and techniques to handle network restoration as a result of physical damage or failures in software and control systems. Special interests are devoted to the survivability of broadband networks employing the new transport/switching techniques based on the synchronous optical network (SONET) and asynchronous transfer mode (ATM) standards due to their emerging role in future B-ISDN. Network integrity due to failures of common channel signaling (CCS) systems is also very critical. The present special issue includes 22 papers and is organized into the following sections: user perspectives and planning, software quality and reliability, network survivability characterization and standards, network restoration for SONET networks, network restoration for ATM networks, traffic effect and performance enhancement for computer networks, and survivable network design methods. Network restoration methods for SONET, ATM, and computer networks correspond to those for the physical layer (SONET), ATM layer, and the network layer, defined in the CCITT broadband ISDN layer structure     

NFVO标准和实践

网络功能虚拟化(NFV)是未来网络发展的重要趋势,也是目前全球各大标准组织和开源社区的工作重点.网络功能虚拟化编排器(NFVO)是编排和管理NFV网络的核心功能,也是运营商和设备厂商关注的焦点.全面梳理了NFVO相关的国际国内标准组织及开源项目的最新研究进展,阐述了中国电信股份有限公司北京研究院联合江苏分公司研发的NFVO系统架构和关键组件,并基于现网实践指出NFVO在未来研发和部署中的挑战.     

Non-IP Multi-protocol Stack for Vehicular Communications

Wireless vehicular communications are gaining momentum, mainly to improve road safety through the use of cooperative systems. Such visionary cooperative applications are based on recently established families of standards, notably the IEEE Wireless Access for Vehicular Environment (WAVE) and the ETSI ITS G5. Despite some relevant differences, both family of standards share the same physical and MAC layers, described in the IEEE 802.11:2012 - amendment 6, also know as IEEE 802.11p. Due to the characteristics of the wireless communications in vehicular environment, e.g., high-speed mobility causing unpredictable time-varying changes in connectivity, IP protocols are not suitable for safety communications as they require channel scanning, authentication and association under strict time limits. Safety vehicular communications rely, instead on non-IP protocols, either the WAVE Short Message Protocol (WSMP) or the FAST Network and Transport Protocol (FNTP). In this paper, we explore some of the challenges of implementing such protocols, and designed an architecture for a stack capable of handling both standards. The proposed architecture, including the communication and transport layers of the stack, was implemented in a custom ETSI ITS G5 compliant platform (IT2S), and its performance was assessed using a prototype.