我国电信技术的发展与传统电信网络革新[6]

７通信网络的融合趋势现在电信、计算机和有线电视网络各有自己的业务领域和不同的技术特征 ,长期以来无论是业务还是网络都是相互分离、各自为政。数字化趋势使得语音、数据和图像业务流都可以通过转换和编码后表示为相同的０／１数字信号形式 ,从而在统一的平台上传送和交换 ,这就为三网融合奠定了基础。三网融合是人们追求多媒体业务的必然要求和信息技术发展的自然结果 ,其好处是多方面的 :可以降低运营成本 ,可以更便捷地满足用户对多业务的需求 ,可以提供更优质的服务 ,便于新业务的开发 ,并且通过不同网络间的竞争和融合 ,可以推动整…     

浅谈多业务SDH传送网的发展机遇

SDH网随着语音业务的发展而建设，现已形成对用户区域的覆盖。SDH网络也承载了ATM、IP网络的业务，但采取统一的网络和技术来传送和处理多种业务，将使电信运营商在多方面获益。     

解读“三网融合”

“三网融合”的动因数字技术的发展为电信、计算机和广播电视三网融合奠定了技术基础。电话、数据和图像等信息都可以采用统一的数码传输、交换和分配,消融了划分三个业务的基本技术隔膜。网络技术、软件技术发展,使三大网络最终都能支持各种功能和业务。不同的业务完全可以跑在同一张网上。在技术上,三网融合已是水到渠成。电信、广电、INTERNET三大产业也发展到了一定阶段,从顺应市场需求和节约社会资源的角度,相互融合、互相渗透成为不可阻挡的潮流。融合成为必然的趋势。“三网合一”到“三网融合”沿着陇海铁路线,布设有电信、网通…     

基于Martini＆Malis MPLS的综合业务平台原理及应用研究

经国内外专家反省论证和试验，认为建立电信级的IP网络可以经济可行地解决未来网络的“三网”融合问题。根据NGN的体系架构，“三网”融合实际上是要解决输送层的融合，即采用一个综合性的多业务平台来解决话音（实时性业务）、数据（非实时性业务）、图像（大容量突发性业务量）等业务的传送问题。由于ATM技术已经证明不能作为下一代网络的综合业务传送平台，因此，全球几乎所有著名的通信制造商都     

面向IP的分组传送网发展思路

业务IP化触发了新一代光传送网——分组传送网的兴起,业务IP化对光传送网提出了更大带宽传送、更加灵活组网等新挑战。实现IP与传送融合的分组传送网定位于满足IP业务的高效传送、灵活组网、高可扩展性和高可靠性等方面。分组传送概念在不同发展阶段和不同网络层次所表现的形式不尽相同,在骨干网主要表现为IP over波分复用（WDM）／光传送网（OTN）／可重构光分插复用（ROADM）的大带宽传送,而在城域网范围主要表现为以传送多协议标签交换（T—MPLS）和电信级以太网（CE）为代表的分组交换和传送技术。     

业务融合的宽带接入网技术分析（一）

“三网融合”已经成为下一步推进信息化应用的趋势。网络融合是由业务竞争以及运营商降低网络的运营和维护成本驱动的。通过网络融合，运营商将努力提高资产的利用率，扩大覆盖范围，提高业务的易用性，扩展网络的多业务领域。而随着IP技术的发展，IP网络成为未来网络融合的核心，运营商都把建设面向IP业务的电信基础网作为其网络建设的重点。宽带接入网连接着用户与核心网，是IP网络建设中非常重要的一环。当前的宽带接入网，     

光传送网演进过程中的OTN技术应用分析

随着数据流量在网络中激增,IP业务逐渐成为电信网络的主导业务,由于IP业务本身的不确定性和不可预见性,特别是IP业务的多样性、精细颗粒和大颗粒等特性对作为电信业务基础承载网络的光传送网提出了新的挑战。本文总结出在新业务驱动下光网络的近期演进方向为向统一传送网演进,对于光网络向统一传送网演进过程中重要的OTN（Optical Transport Network）技术进行了技术特征、设备形态及应用场景的分析,提出了相应应用建议及案例。     

分组传送网标准进展

全球运营商正致力于构建自己的下一代IP包交换网络,网络逐步迈向全IP化。不断增长的数据业务对网络的带宽、服务质量（QoS）、操作维护管理、可靠性等提出了新的要求。IP网络业务融合（如视频、语音、数据融合）需求以及多业务统一的承载需求,进一步驱动传送网技术与数据网络通信技术融合。分组传送网技术应变化而生,分组传送网标准发展迅速。     

构建面向三网融合的新一代IP承载网络架构

作为三网融合正式启动的元年,2010对于广电和三大电信运营商来说都是不平常的一年,伴随三网融合方案和第一批12个试点城市的出台,三网融合已进入可见的实施阶段,其标志着面向三网融合的下一代网络建设工作也将拉开竞争的序幕。由于广电及电信网络在技术及业务方面的差异性,H3C认为,广电在三网融合过程中,主要应开展以下两方面的工作：在业务方面,开展以视频业务为核心的业务创新;在网络层面,打造新一代IP网络,以满足三网融合时代新业务对技术的各类需求。     

新潮流 IP趋势下的分组传送

近年来,网络IP化趋势越发明显,传送网所承载的业务发生了巨大变化。电信市场研究机构Heavy Reading针对下一代组网技术的主要驱动因素对全球60个主流运营商进行了调查,结果显示,三重播放、电信级以太网／可管理的VPN、VoIP,高速因特网接入等应用位于前列。这表明业务承载的口化趋势已经在业内形成共识,未来的光传输网络将主要负责IP／以太网流量的传送,为分组的流量特征而优化,向着智能的、融合的、宽带的、综合的方向发展。     

Telecommunications

The telecommunications blueprint for a single Europe after 1992 is examined. This `green paper' is an ambitious three-year-old document in which the European Community's Commission calls for a Western-Europe-wide telecommunications infrastructure based on the integrated-services digital network (ISDN) and other digital communication links. The progress that has been made toward this goal is assessed, showing that progress toward opening national markets and establishing an infrastructure varies greatly from country to country. The highly variable quality of network services throughout Europe presents a further obstacle to unification. Nevertheless, the national segments of a trans-European ISDN system are beginning to emerge, and work on the specific technologies, standards, and regulations for cross-border telecommunications systems are advancing     

Telecommunications

The author presents a technological overview of the telecommunications field covering the topics of: European telecommunication authorities privatisation; mobile communications in Asia; fibre optic amplifiers; and cable TV integration with wireless technology     

Telecommunications

The author discusses advances and changes in: Internet; multichannel optical fibre networks using erbium-doped fibre amplifiers and wavelength division multiplexing; HDTV; digital radio; satellites for mobile voice telephony; the auction of wireless telephony licences; and unlicensed personal communication systems     

Telecommunications processors

Telecommunications controllers worldwide are becoming increasingly stored-program oriented. Electromechanical and electronic wired logic controllers lack the flexibility, maintainability, and (ultimately) the economy of stored program processors. While similar to commercial computers, most stored program telecommunications processors have features unique either in nature or degree of application. There also exists a remarkable variety of overall architectural features which are useful in telecommunications applications, and a similar variety of administrations and manufacturers willing to espouse them. Pertinent stored program processor architectural features are discussed as a dass, then extant and proposed processors are described and placed in perspective, Finally, likely future trends are discussed.     

Telecommunications numbering

Numbering volatility in telecommunications is a by-product of progress from a monopoly telephone service to the multiservice, open market of the 1990s and the next century. The last twenty years have seen much number changing activity, including the London code change of 1990. A national code change is scheduled for 1995. The paper presents an understanding of these developments, and investigates personal numbering, branding, portability, and other issues which will be topical throughout the rest of the decade     

Telecommunications in Indonesia

The telecommunications in Indonesia is reviewed with emphasis on transmission and switching networks. It is recognized that due to the geographical configuration of Indonesia, problems are created in the field of telecommunication that require special transmission consideration. The existing Perumtel's Transmission Network and Domestic Satellite Project Palapa 1 are discussed. The future expansion programs in transmission and switching are also briefly reviewed.     

Telecommunications in Lithuania

According to Lithuania's Master Plan, further development of the country's telecommunications infrastructure must be concentrated on modern digital technology, most of it produced in Western countries. The Master Plan is divided into three parts. First, it is a short term plan that covers the development of telecommunication systems with high priority, and covers the period through the end of 1997. Another goal stated in the Master Plan is to have 48 main lines per 100 inhabitants by the year 2005. In addition, the Ministry decided to issue one license for operating a national paging network in 1995. This network must cover most of Lithuania. The number of licenses for local paging networks will not be limited     

澳大利亚电信业的发展

对澳大利亚电信业发展的历史及现状，包括无线通信、有线通信及计算机通信等方面进行了介绍，对该国电信业未来发展的前景作了展望。