广电下一代同轴接入技术展望

三网融合已经进入全面推行阶段。面向下一代IP化的高带宽电信级全业务接入需求,作为业务的承载管道,广电接入网需要向下一代IP化Multiplay接入演进,以满足宽带中国的战略要求,为未来的全业务竞争打好基础。以广电运营商的宽带接入网承载需求演进讨论为基础,重点分析了广电运营商在面向三网融合全业务接入时的接入网技术演进各阶段的技术选择,同时展望了广电接入网技术的主要发展方向。     

面向三网融合的宽带融合接入网技术及其演进

视频业务作为三网融合的核心业务给网络带宽提出了更高的要求,因此宽带提速是融合业务的必然趋势,但最后1 km的入户端部分仍存在瓶颈问题,所以当前接入网需要技术演进。文章讲述了宽带融合接入网(电信和广电)的接入网模型及部署思路,最后基于CBM(组件化业务模型)提出了以用户为中心的宽带融合接入网演进、面向虚拟运营的宽带融合接入网。     

三网融合下宽带接入网发展策略探讨

分析了三网融合下各类业务对宽带接入网的需求以及国内宽带接入网的网络现状和技术现状,指出现有接入网技术满足近中期三网融合业务需求。     

基于CORBA接口的ANDSF动态实现

3GPP(第三代合作伙伴计划)组织在R10版本中引入了ANDSF(接入网发现和选择功能单元),协助终端进行接入网的发现和选择。文章介绍在EPS(演进分组系统)现有系统架构下的ANDSF技术,分析其不足之处,提出基于CORBA(公用对象请求代管者体系结构)接口的ANDSF动态实现方案,详细介绍其实现流程和涉及现网改造的网元,最终目的是进一步减少接入网的切换时延,提高用户感知度。     

浅析有线电视接入网技术的发展

近年来,三网融合社会形势对技术的融合与发展具有很大促进作用。本文基于个人观察视角,有线电视接入网现状与在时代变革中的发展趋势进行描述,并对有线电视接入网体系架构、信道绑定与全频带捕获、模拟和数学光纤等技术性问题提出相关建议。     

广电接入网设备统一网管平台的设计与实现

通过对广电接入网设备主要构成的总结,指出了进行设备统一管理的必要性和迫切性。因此,本文给出了接入网设备统一网管平台的设计思想、架构方案和技术实现方法,为三网融合提供了一定的理论基础。     

以太网组网确保OLT可靠汇聚

FTTx与三网融合掀起了接入网的革命,EPON技术在IP城域网中大量应用。运营商在不断升级、更换原有的接入网设备,原有的网络架构已经发生质的改变。然而在接入带宽大幅度提高的同时,     

有线电视接入网技术发展趋势

三网融合的大形势促进了技术融合和发展。站在个人观察角度,描述了有线电视接入网在这个大变革年代可能发展的方向和具体趋势,对有线电视接入网的基本体系架构和数字光纤与模拟光纤、全频带捕获与信道绑定、业务承载IP化等具体技术问题提出了个人见解。     

承载融合业务的城域网规划和设计简

本文从技术角度,探讨了三网融合背景下承载融合业务的城域网规划和设计方面的问题。在对OTN、PTN、EPON等技术分析的基础上,提出了三层架构的城域网设想,并对接入网流量进行了模型分析。     

三网技术演进与融合趋势

对电信网、互联网和广播电视网的技术演进进行了分析,认为三网融合是技术发展的必然趋势.对三网融合的本质、原动力以及在我国的发展现状进行探讨,指出三网融合与技术演进存在相互促进作用,三网融合是三网在向下一代网络演进中通过分层逐步融合的长期过程.     

Completing the convergence puzzle: a survey and a roadmap

Convergence has more than ever been a central issue for fixed and mobile operators throughout the world and is considered to be the next big step in the evolution of telecommunication networks. Convergence opens new market opportunities and competition among network operators and above all offers enhanced user experience. Multimode handsets and the proliferation of terminals and access technologies are generating increasing demands for solutions that enable convergence, seamless handover, and transparent service delivery across heterogeneous access networks. Different strategies are available for operators, depending on the services they intend to deliver to their customers, from basic commercial convergence limited to unified billing for Fixed/Mobile/Internet up to in-dept network convergence covering new applications and services. This article surveys different technologies which offer seamless handover and converged access to mobile voice, video, and data services. It provides first the different network parts involved in defining the operator global convergence strategy and then surveys different technologies which achieve this step-by-step convergence. We present the main features of these technologies and discuss their limitations and potentials to enable convergence in heterogeneous networks. We also provide a personal stance as to the emergence of these technologies and our vision towards the long term converged telecommunication networks.     

构建下一代广播电视网（NGB）实现“三网融合”

本文首先介绍“三网融合”的发展现状,分析用于“三网融合”的IPTV技术发展缓慢的内在因素,然后在分析下一代广播网（NGB）及其关键技术的基础上,论证了传统广播电视网能够也应该向NGB演进,最终实现“三网融合”,为用户提供全媒体体验。     

三网融合现状及发展策略

 文章首先界定了三网融合的概念,指出三网融合是技术、业务、市场、法律法规和监管机构的多层次融合,其核心不是某种网络一统天下,而是发挥不同网络的物理优势,使得任何人能够通过任何一种物理网络方便的获得任何一种信息服务。在技术进步、市场需求和产业管制的驱动下,未来三网融合的发展方向是电信网、互联网、传媒网的新三网融合。文章对比了发达国家三网融合的政策法规和市场情况,通过分析中国三网融合的现状和存在的问题,从技术、市场和产业政策等方面提出中国三网融合的发展策略建议。     

Design considerations of satellite-based vehicular broadband networks

Convergence between wireless networks is the main trend in current and future wireless communications. The distinct advantage of satellite and terrestrial network integration is the possibility to provide ubiquitous multimedia services in vehicles at any location. The key design considerations of mobile broadband satellite access technologies are given in this article. After presenting the conceptual models of a system and services, the design issues of satellite network synchronization and burst demodulation are described. The design considerations of medium access control, resource management, capacity, and buffer controls for internetworking are given. Also, the active antenna issues are provided along with a sample design.     

采用DOCSIS技术实现NGB接入网的升级改造

在三网融合的背景下,本文从现有及未来的业务出发,分析业务对接入网络的带宽要求;采用DOCSIS技术改造接入网络在现阶段能够满足业务发展的需要。     

基于分段式PPP协商的快速网络接入算法

多网融合是当今无线通信网络发展的必然趋势,垂直切换是网络融合的关键技术之一。对现有3G网络的终端接入信令流程进行分析,提出了一种基于分段式PPP协商的快速接入算法。通过在现网环境中测试,证明该算法有效地缩短了切换执行时延,对垂直切换过程中"切换执行"阶段的研究做出了贡献。     

EOC接入技术分析

简要介绍三网融合的背景,分析以EOC(Ethernet over Coax)为代表的三网融合接入技术,其中对EOC技术特点、EOC技术分析对比、EOC部署方案及管理等方面进行了详细介绍。最后对EOC技术的应用进行了展望。     

基于Mesh技术的网络融合与协同

无线网络在网络、技术、终端、运营管理等各个方面越来越体现出异构的特点。异构网络的有效融合与协同可以通过Mesh技术完成。异构网络的融合为IP层面的融合,是对网络共性的整合,异构网络的协同则是对网络个性的整合。通过网络间的融合与协同,对异构网络分离的、局部的优势能力与资源进行有序整合,最终实现无处不在、无所不能的智能性网络。     

Fusion of digital television,broadband Internet and mobile communications—Part II: Future service scenarios

This is the second part of the tutorial paper following the previous tutorial paper describing enabling technologies in digital video broadcasting (DVB) system. The paper presents the current and future operational scenarios for DVB via satellite (DVB‐S) system. Review of the current state‐of‐the‐art technologies consisting of integration of broadband Internet and mobile communications and integration of broadband Internet and DVB are given. The future operational scenarios emphasize the fusion of DVB systems with other technologies in terms of network fusion and terminal fusion. For satellite service scenarios, it also takes into consideration mobility management and standard quality‐of‐service mechanism issues, such as integrated services and differentiated services. Several research directions for providing seamless services regardless of network, access technology and terminal in the fusion network are also highlighted in this paper. Copyright © 2007 John Wiley & Sons, Ltd.     

Research on Convergence Network of EPON and WiMAX Based on ROF

Convergence of optical and wireless networks is a promising development for future access network architecture. A Radio over Fiber (ROF)-based network that converges Ethernet Passive Optical Network (EPON) and Worldwide Interoperability for Microwave Access (WiMAX) technologies makes it possible to simultaneously transmit EPON baseband signals and WiMAX wireless Radio Frequency (RF) signals. This article elaborates on uplink and downlink transmission, redundancy protection, and roaming features of such a network.