CORBA和网络管理

文章探讨了ＴＭＮ和ＣＯＲＢＡ相结合的可能怕,针对在ＴＭＮ框架中引入ＣＯＲＢＡ技术,给出了基于ＣＯＲＢＡ的电信网络管理体系结构。     

亚信助力贵州移动互联网

日前 ,亚信科技 (中国 )有限公司宣布与贵州全球通移动通信器材有限公司正式签约 ,建设贵州移动互联网一期项目。该项目将实现贵州省网中心节点、ＣＭｎｅｔ省网设备以及现有贵州移动 172网络设备的融合。根据合同 ,亚信公司将提供系统集成服务以及自主研发的大容量电信级计费软件ＡＩＯＢＳ、电子邮件应用管理系统ＡＩＭＣ和综合网络管理系统ＡＩＳｅｒＢａｓｅ。贵州移动互联网是基于ＩＰ的新一代开放电信基础网络 ,其网络覆盖全省主要城市 ,通过移动自有传输网向全省提供互联网公众服务。工程将于 2 0 0 1年底开通 ,届时可开展拨号接入、…     

CORBA与TMN的集成

１引言 由于电信业的逐步开放和进一步全球化,电信网的规模和复杂性正在不断增加、同时,电信运营商为了增强竞争力,需要不断地提供新的业务,使得电信网络更加复杂。为了可靠地管理这些复杂的网络,其管理网络ＴＭＮ（电信管理网）的工作负荷和功能也需要相应地增加。为了减轻管理系统的工作负荷,可将ＴＭＮ的负荷和功能划分为较小的可管理子集,在这种情况下,分布式网络管理就有了用武之地。目前在这一领域,ＣＯＲＢＡ技术巳经引起了越来越多的人们的关注,很多企业和研究单位正在就如何将ＣＯＲＢＡ运用到ＴＭＮ中去进行研究。本文…     

信息站点2

朗讯科技ＴＤＭ１０Ｇｂｉｔ／ｓ系统在我国首次开通北京电信２０００年传输骨干网络扩容一期工程采用了朗讯科技的ＷａｖｅＳｔａｒＴＭＴＤＭ１０Ｇｂｉｔ／ｓ等先进的光网络设备 ,这是该系统首次在中国投入使用。北京电信在本地网中大规模引入１０Ｇｂｉｔ／ｓＳＤＨ设备 ,这在国内处于领先地位。北京电信２０００年传输网扩容二期工程也已决定采用朗讯科技的ＷａｖｅＳｔａｒＤＡＣＳ４／４／１,ＴＤＭ１０Ｇ（ＯＣ１９２） ,ＡＤＭ１６／１,ＡＤＭ４／１和ＩＴＭ -ＳＣ等设备。 (正 )爱立信推出针对ｃｄｍａ２０００的分组核心网解决方…     

解读电信“普遍服务”

一个多世纪前,美国ＡＴ＆Ｔ在其发展中提出口号：一个网络（Ｏｎｅ Ｎｅｔｗｏｒｋ）,一个政策（ＯｎｅＰｏｌｉｃｙ）,普遍服务（Ｕｎｉｖｅｒｓａｌ Ｓｅｒｖｉｃｅ）,这是第一次出现“普遍服务”的概念。当时“普遍服务”的真正含义是ＡＴ＆Ｔ对电信市场和网络的垄断,ＡＴ＆Ｔ认为,只有它的独家垄断,才能使用户都可使用“全球通”电信服务。随着电信的发展,“普遍服务”的含义逐渐转变,用最简单和容易理解的话说,“普遍服务”就是电信经营者应承担为广大消费者提供广泛的基本电信服务的义务和责任。其含义包括：一是为任何人在…     

交换网络的操作与维护系统T－XM

ＸＭ是为网络单元（ＮＥ）提供操作与维护支援的一种软件。它主要用于维护电话和蜂窝移动通信中的ＡＸＥ设备的网络单元一级，还包括电信管理网（ＴＭＮ）的Ｑ３接口。就是说，ＸＭ还可以处理非ＡＸＥ类型交换设备的告警、文件和指令。ＸＭ是爱立信公司的网络管理系统（ＮＭＡＳ）中几种操作与维护工具之一。使用ＸＭ，在操作与维护中心（ＯＭＣ）或网络管理中心（ＮＭＣ）就可以有效地管理整个地区的交换网络。     

UT斯达康WACOS多用业务IP交换系统

ＷＡＣＯＳ 是面向未来的统一多业务ＩＰ交换系统。它不仅实现了通信网络从有线到无线、从窄带到宽带、从ＴＤＭ交换到ＩＰ交换的全方位转变,还兼顾到传统电信网络制造商和业务运营者利用现有基础设施提供新业务的需求。从而为通信网络平滑过渡到未来铺平了道路。ＷＡＣＯＳ系统采用灵活、性价比高、扩展性好的软交换体系结构,利用多协议网关,通过统一的ＩＰ网络向用户提供语音、数据、Ｉｎｔｅｒｎｅｔ接入及其它多种宽带业务。在未来的网络中,ＷＡＣＯＳ还支持 Ｆａｘ／ＶｏＩＰ、ＲＡＳ及高速ＩＰ交换和路由等功能。ＷＡＣＯＳ系统综合了交换、接入、运营支持等技术,为业务运营商提供了全面、有效、经济的解决方案。ＷＡＣＯＳ是构建下一代电信网络的理想体系。 一、系统特点 采用ＷＡＣＯＳ系统,网络运营者可以构建一个基于ＩＰ的、灵活、可靠、可扩展、性价比高的开放式多业务电信网络。在ＷＡＣＯＳ系统中,网络和业务均能适应未来发展的需求。对网络运营者来说,ＷＡＣＯＳ可以实现向未来网络的平稳过渡。 １．统一网络,多种服务 采用多协议接入网关,ＷＡＣＯＳ能够在一个网络中提供多种电信业务。如：基本业务、附加业务、移动业务、高级业务、管理业务、Ｉｎｔｅｒｎｅｔ接入业务...     

运营商应关注全方位通信信息服务

未来的电信运营商将是全网络全业务电信运营商,客户完全可以选择一家电信运营商为其提供固网和移动的电信服务。众所周知,用户量对电信运营商来说至关重要。因为电信业就是靠电信服务来生存和发展的。其电信服务的丰富性和网络的稳定性决定了电信运营商在未来的发展前景和地位。在电信运营商即将进入全网络全业务电信市场时,这种对客户的综合通信服务能力和水平就显得更为重要。     

西门子DXC交叉连接技术及网络优化

１前言随着中国经济的发展 ,中国的电信传输网络的规模也越来越大 ,而早期采用ＡＤＭ +环形结构的传输网的缺陷和不足也逐渐暴露出来 :·网络中环的数目越来越多 ,不便于管理 ;·两点间业务的连接需要经过多个环 ,每个环都要做相应的保护 ,占用网络资源 ,网络的效率低下 ;·随着经济的发展 ,在某些业务节点的业务量越来越大 ,一两套ＡＤＭ已经不能满足要求 ;·跨环业务增加 ,环间业务量的转接由多套ＡＤＭ完成 ,业务量调配很不方便 ,且不便管理 ,安全性不高 ;·节点ＡＤＭ扩容不方便 ,通常只能增加另外一套ＡＤＭ设备或将其整个替换。针对这…     

世界电信

韩　　国　　八十年代初,韩国中央政府的电信政策发生变化,新成立了韩国电信(ＫＴ)和韩国数据通信(ＤＡＣＯＭ)两家公司。前者主要经营话音业务,后者通过向ＫＴ公司租用线路提供数据通信。八十年代中期,韩国又成立了两家公司,其中,ＫＭＴ提供蜂窝区移动电话业务和无线寻呼业务,ＫＰＴＣ为港口地区提供通信业务。1991年,ＫＴ和ＤＡＣＯＭ公司的业务关系发生了变化。ＫＴ开始经营数据通信业务,ＤＡＣＯＭ国际公司开始提供电话业务。1995年,ＤＡＣＯＭ成为韩国第二家国内长途电话业务公司。虽然政府最初规定ＤＡＣＯＭ的国际电话收费较ＫＴ低3%…     

在融合和优化中演进的统一承载网

文章主要讨论了承载网融合过程中网络和设备的架构与功能以及智能软件在流量优化中的关键技术。文章认为网络、设备的融合和多层多域网络的联合优化调度,可以减轻IP网络流量压力,提高承载网运营效率并降低运营商的资本投资和运维成本,是电信网络发展的长期趋势。     

TMN and new network architectures

The impact of telecommunication management network (TMN) concepts when applied to the management of newly emerging network architectures is illustrated using the example of intelligent networks (INs). An in-depth comparison of TMN and IN architectural aspects leads to a number of conclusions showing a significant degree of commonality between the two networks. The IN is analyzed as a telecommunication network architecture aimed at reducing service creation and modification development costs and delays. This approach unifies the processing techniques for a number of highly diversified network services. Similarly, the TMN, which covers a wide range of management resources organized into a unique architecture, tends to unify operation, administration, and maintenance (OAM) for complex and evolving communication networks, despite their highly diverse network components     

基于网络处理器的以太网OAM设计

为了实现电信级的、高可靠的以太网,需要以太网支持运行、管理维护(OAM)功能。而网络处理器(NP)由于具有处理速度快、编程能力强的特点,在目前主要的电信设备制造商中得到了大量的应用。因此,通过网络处理器实现以太网OAM功能是一种十分迫切的要求。在此,首先介绍了以太网OAM的相关标准、消息格式,然后对NP的工作原理和功能特点进行了介绍,最后给出了一种基于NP的以太网OAM功能的实现方法。     

OAM mechanisms in MPLS layer 2 transport networks

This article describes OAM in MPLS layer 2 transport networks. MPLS networks used to transport layer 2 traffic are referred to as MPLS layer 2 transport networks. They may be used to connect legacy layer 2 networks and/or provide layer 2 service to a user over a MPLS network. As legacy layer 2 networks migrate to use MPLS for transport, the role of MPLS OAM mechanisms is becoming increasingly important. This is because the converged network must offer the same OAM functionality as existing layer 2 networks. This article emphasizes the importance of end-to-end OAM, while emulating existing layer 2 services using MPLS transport. End-to-end fault detection is described in the context of various layer 2 over MPLS transport network models. The article focuses on state-of-the-art MPLS label switched path and pseudo wire OAM mechanisms being developed by the IETF. This includes fault detection and isolation mechanisms such as LSP-Ping, bidirectional forwarding detection, and virtual circuit connectivity verification. The applicability of each of these mechanisms is given. In some cases it may be possible to carry layer 2 OAM cells end-to-end, while in other cases this may not be possible. The relationship between segment-based OAM mechanisms and end-to-end OAM is described for each of these cases.     

高速通信的桥梁——ETNA SDH网络

功能强大的传送网是现代电信业务的核心和基础。爱立信的ETNA SDH网络由相对独立的业务网、管理网、数据通信网、同步网和辅助网5部分组成,在众多电信业务之间起到了多功能、高效率的桥梁作用。     

A multiservice user descriptive traffic source model

The asynchronous transfer mode (ATM)-based broadband integrated services digital network (B-ISDN) dominates the research interest in telecommunications. Traffic and network modeling are the techniques used for performance evaluation and assessment of B-ISDN design alternatives and planning. The specific nature of the ATM technique requires new approaches for traffic modeling. Selecting appropriate traffic source models is an important issue, since it is closely related to the successful design and efficient performance of the networks to be built in the future. The source (multilevel, multiservice structured Markovian) model presented provides a simple way for characterizing the behavior of a telecommunication user recognizing the multilevel discipline of a telecommunication session. The traffic model is general enough to fit a variety of different services by appropriately varying the values of the parameters defining it, but also it is simple enough because it is described by a small number of parameters and the defining parameters make a good intuitive sense by being closely related to actual physical quantities     

T-MPLS的关键技术研究

随着电信业务的迅猛发展,融合正在成为通信行业发展的主旋律.作为传送平面融合的新技术--T-MPLS满足了下一代传送网高速率、多业务、高性能的需求,是下一代传送分组网的发展趋势.本文在T-MPLS研究现状的基础上,分析了现有传送技术面临的问题,归纳并总结了T-MPLS的各项关键技术,包括其转发行为、生存性机制、OAM机制等,提出了目前研究的缺陷与不足并指明了进一步研究的方向和重点.     

Management and control functions in ATM switching systems

As research has progressed, it has become clear that the main difficulties in ATM pertain to its operational details rather than the concept. And it seems likely that these control issues will be much more complicated and costly for ATM switches when compared with current telephone circuit switches. The asynchronous transfer mode (ATM) is the target switching technique for the future public broadband integrated services digital network (B-ISDN). The purpose of this article is to examine the management and control functions in ATM switching systems implied by current industry standards and agreements on OAM and traffic control. Until now, ATM research in the areas of switch design and traffic control have progressed essentially independently. First, we briefly review the B-ISDN Protocol Reference Model and its representation of the different information flows in ATM. Network management and traffic control principles in ATM, and in particular OAM, are overviewed. With this information as background, we attempt to infer their implications on the functional blocks of an ATM switching system. An example switch architecture model with distributed management and control functions is outlined, and some design issues are discussed     

Construction of baselines for VoIP traffic management on open MANs

In the last century, owing to the constant evolution of technologies telecommunication networks have become increasingly robust, being able to support multiple services. These services are part of the heterogeneous network traffic that can be carried through the Internet. Many of these services, including VoIP, are latency sensitive. In other words, this means that their quality depends directly on the network quality of service. Since users tend to become more sensitive with the instability and unavailability of the network, it is important to improve traffic management. A particular type of data that could be used to improve VoIP traffic management is the Internet Protocol Detail Record (IPDR). IPDRs are tickets created by all VoIP call attempts which contain a group of information related to the call history. Because of its full range of information, IPDRs can be used to create VoIP traffic baselines. This paper presents the development of baselines based on IPDRs to support VoIP traffic management in open‐access Metropolitan Area Networks (MAN). Copyright © 2013 John Wiley & Sons, Ltd.     

Network Design Using SMDS and Leased Lines

In this paper we consider designing a high-speed virtual private network using a combination of heterogeneous telecommunication services. In particular, we consider mixing SMDS access lines and point-to-point digital leased lines to construct a virtual private network at minimum cost. We develop a nonlinear combinatorial optimization model and a simulated annealing algorithm to find a high-performance, low-cost network design. We compute lower bounds on cost savings from using mixed services as opposed to pure SMDS based on actual tariffs and realistic traffic.