广东省IP城域网建设与宽带业务发展思路

论述了广东省IP城域网建设和城域网中宽带业务的发展思路。主要描述了IP城域网的组网方法和宽带业务的分类。     

宽带IP城域网的组网技术与实践应用

随着现代信息技术的飞速发展,宽带IP城域网已经广泛应用于电信网络建设中。如何为网络用户提供速率高、性能好的宽带IP接入服务,在宽带IP基础上开发设计个性化网络增值业务,目前已经成为各大网络运营商的发展建设目标。文章在分析了宽带IP城域网建设原则的基础上,对其组网技术和建设方案进行了深入研究。     

ISN8850智能业务交换机介绍

如何快速地发展宽带业务,迅速占领新一轮市场竞争的先机,建设可运营、可管理的宽带IP城域网,成为摆在新时期电信运营商面前的关键课题。目前,全国各地的宽带城域网规划建设并不是一帆风顺,普遍面临着从网络技术的选择、业务提供、设备选择到运营管理等方面的问题,阻碍了市场的正常发展。在已建成的宽带城域网中,如何建立业务模型、开展何种应用服务以及如何开发新的增值业务以确保网络可持续赢利,已成为很重要的问题。《ISN8850智能业务交换机介绍》一文所介绍的华为的ISN8850智能IP业务交换机就是要解决电信运营商在向用户提供IP业务过程中所面临的各种问题,使IP成为一个可运营、可管理的电信网络。ISN8850智能IP业务交换机是电信运营商建立可运营、可管理IP网络理念的重要产品。     

宽带城域网及其增值业务

城市信息化离不开城市信息高速公路 ,宽带城域网的建设为城市信息化提供了高速通道。IP网和ATM网将是宽带城域网的核心平台 ,宽带接入技术将成为城域网接入的主要手段 ,宽带城域网整体解决方案离不开IP软技术的应用 ,三网融合将是宽带城域网发展方向。增值业务是网络不断发展的动力所在     

宽带IP接入的相关技术

宽带IP城域网的建设正处于稳步发展时期，从最初的圈地到目前有序的网络建设过程中，宽带IP接入技术也在不断地摸索发展，逐步适应网络的建设、维护、管理以及业务的开展等各种需要。本文主要论述宽带IP城域网接入网的一些较新的关键技术。     

宽带IP城域网中局域网互连业务的实现

当前，宽带网络建设包含三个层次的内容：即骨干网、城域网和小区网。城域网能灵活地组网和提供特色宽带业务，是IT界谈论的热门话题，因而发展迅速。城域网提供的业务一般有三类：（1）专线接入Internet业务；（2）获取Internet服务的同时还能获取城域网内部的服务；（3）局域网互连业务。其中，局域网互连业务在学校、政府机关和集团用户等市场中存在强烈需求。由于这部分用户具有较高消费能力或潜在消费能力，早已成为电信运营商和计算机公司争夺的大客户。１宽带IP城域网结构一个典型的基于IP技术的宽带城域网网络结构如图1所示。城…     

宽带IP城域网及其应用

文章结合南京电信公众宽带IP城域网的建设，对宽带IP城域网的网络结构、用户接入安全、网络管理和认证计费作了阐述，并简要介绍了应用于宽带IP城域网上的一些业务。     

宽带IP城域网建设方案

近几年来，以IP技术为基础的Internet取得了迅速地发展，国内基于Internet的宽带业务需求也在迅速增长。随着骨干网的带宽化，电信运营商的工作重点已经转移到宽带城域网建设和运营上。作为直接面向最终用户的城域网，与传统的IP网络相比，独具特色。本文将探讨如何建设可运营、可管理的宽带IP城域网。     

宽带IP城域网骨干网络建设方案研究探讨

IP技术为代表的宽带数据通信业务的迅速崛起，使得全球新老电信运营商在宽带IP网络的建设上基本都站在同一起跑线上，纷纷斥巨资构造面向未来的宽带网络。目前宽带骨干网上的ATM与IP之争已经随着大部分运营商国家宽带骨干网建设的完成而结束了，作为国家宽带骨干网竞争的延续，竞争的焦点集中到宽带城域网和宽带接入网方面了。应该说，是用户对宽带多媒体业务的需求和数据网络自身发展的需耍促使了宽带IP城域网建设与运营的发展，而出口速率的拓宽和骨干网络的宽带化也为城域网的建设提供了条件。     

港湾网络多业务万兆城域网解决方案

为了满足用户对IP数据、语音和视频等宽带业务的需求,各大运营商利用IP、以太网、xDSL、无线等技术组建宽带IP网络。目前以宽带IP技术为核心的NGN和3G网络建设的商用化进程又对现有的宽带IP城域网提出了新的挑战,宽带IP城域网面临着如何开展多媒体业务来实现网络持续增值,如何满足在宽带城域网基础上建设NGN和3G网络新一代电信公网的问题。     

Packet-aware transport for metro networks

Today's metro networks have evolved from the need to support traditional voice and private line services. However, the tremendous growth in access to frame relay, ATM, IP, and Ethernet services, coupled with the desire of enterprise customers to interconnect via Ethernet interfaces, suggests the need for a new approach. This article proposes a new architecture for packet-aware transport networks (PATN) that supports both packet and traditional TDM services and leverages an assemblage of emerging technologies to provide efficient aggregation and switching of packet traffic in metro networks. The PATN has the potential to provide significant cost savings to carriers by reducing the number of network elements, reducing transport costs through statistical multiplexing, and eliminating the need for redundant multiplexing operations.     

The future of the intelligent network

This article examines the role the intelligent network (IN) can play as carriers move to next-generation networks. It discusses possible transition scenarios and examines how the IN could interwork with the Internet and packet-based networks to produce new hybrid services. The article presents a view of a fully converged network, and concludes that IN will continue have a vital role in voice and data services     

电信网发展的战略趋势

本文概要论述了笔者对未来电信网发展的战略趋势的看法,主要涉及网络业务的数据化趋势,网络的宽带化趋势,网络的光纤化趋势,网络接入的无线化趋势,网络的分组化趋势以及三网融合的大趋势。     

Enabling Technologies for Next-Generation Optical Packet-Switching Networks

The optical packet-switching network is considered to be one of the most promising solutions for end-to-end delivery of high-bitrate data, video, and voice signals across optical networks of the future. Optical label switching (OLS) technology incurs simpler extraction and processing of the labels so that the optical packets can be routed with low latency to the destinations. We have developed several key enabling technologies for integrated optical networks, including optical label generation, label swapping, optical buffering, clock recovery, and wavelength conversion. We have designed and experimentally demonstrated these enabling techniques that can provide efficient broadband services in future optical networks.     

The future generations of mobile communications based on broadband access technologies

The forthcoming mobile communication systems are expected to provide a wide variety of services, from high-quality voice to high-definition videos, through high data rate wireless channels anywhere in the world. The high data rate requires broad frequency bands, and sufficient broadband can be achieved in higher frequency bands such as microwave, Ka-band, and millimeter-wave. Broadband wireless channels have to be connected to broadband fixed networks such as the Internet and local area networks. The future-generation systems will include not only cellular phones, but also many new types of communication systems such as broadband wireless access systems, millimeter-wave LANs, intelligent transport systems, and high altitude stratospheric platform station systems. Key to the future generations of mobile communications are multimedia communications, wireless access to broadband fixed networks, and seamless roaming among different systems. This article discusses future-generation mobile communication systems.     

Trunking of TDM and narrowband services over IP Networks

The recent interest in IP as the vehicle for transporting TDM and narrowband services stems from the possibility of using a common transport network for voice, video, and data, and the flexibility with which new services can be introduced. A key step in the evolution of networks towards a ‘broadband’ IP‐based environment is the ‘graceful’ interworking of the IP networks with the existing networks and services, particularly with the circuit switched telephone network. A ‘graceful’ interworking approach is one whose complexity is minimal and preserves the user's perceived quality of service (QoS). To interwork with a circuit switched network whose services are pre‐dominantly time‐sensitive, the IP network must essentially behave as a transparent ‘link’ in the end‐to‐end connection. This paper presents an overview of the main technical problems to be addressed when trunking TDM and narrowband services over IP networks. Copyright © 2002 John Wiley & Sons, Ltd.     

如何鉴别低水峰非零色散位移单模光纤

用户对数据、图像和语音业务的需求的高速增长,推动了网络运营商的城域网建设步伐.光纤制造商针对城域网络业务特点纷纷制造出了城域网用的低水峰非色散位移单模光纤.本文详细介绍了低水峰非色散位移单模光纤的特性及其在城域网络中的应用.     

知识经济需要宽带网

信息和知识已成为社会和经济发展的战略资源和基本要素,而它们的传播和共享需要高速实时的知识化网络,并使网络不断升级。对未来宽带网的发展以及北美地区宽带网的发展计划和做法进行了介绍和分析。     

建设自有骨干传输网，掌握市场主动权——支招中国移动

摆在中国移动面前的关键课题是要建设自有的传输网络。拥有自己的传输网络不仅能满足中国移动本身移动语音业务增长的需求,还能快速发展宽带数据业务,实现带宽批发、带宽出租,争取新一轮市场竞争的先机。本文从干线网和城域网建设两个方面给出了中国移动传输网络建设的建议。     

Terminal‐Assisted Hybrid MAC Protocol for Differentiated QoS Guarantee in TDMA‐Based Broadband Access Networks

This paper presents a terminal‐assisted frame‐based packet reservation multiple access (TAF‐PRMA) protocol, which optimizes random access control between heterogeneous traffic aiming at more efficient voice/data integrated services in dynamic reservation TDMA‐based broadband access networks. In order to achieve a differentiated quality‐of‐service (QoS) guarantee for individual service plus maximal system resource utilization, TAF‐PRMA independently controls the random access parameters such as the lengths of the access regions dedicated to respective service traffic and the corresponding permission probabilities, on a frame‐by‐frame basis. In addition, we have adopted a terminal‐assisted random access mechanism where the voice terminal readjusts a global permission probability from the central controller in order to handle the ‘fair access’ issue resulting from distributed queuing problems inherent in the access network. Our extensive simulation results indicate that TAF‐PRMA achieves significant improvements in terms of voice capacity, delay, and fairness over most of the existing medium access control (MAC) schemes for integrated services.