浅谈用户接入网

介绍了接入网的基本概念，讨论了各种接入方式，其中包括铜线接入新技术，光纤接入，光纤同轴混合接入和无线等接入技术，最后，对ＨＯＮＥＴ综合接入网系统进行了介绍。     

光纤用户接入网简述

本文主要介绍了光纤接入网的概念，结构和特点，并从组网的角度对光纤用户接入网进行了初步探讨。具体内容为：光纤接入网的基本概念；光纤接入网的目标；光纤接入网的结构和接入方式；光纤接入网的建设方法。     

光纤接入网应用技术综述

光纤接入技术因具有简捷、高效等特点被业界人士所看好,可作为宽带接入的长远解决方案。本文主要对接入网的定义、光纤接入网的优点、光纤接入网基本构成、无源光网络、有源光网络、光纤接入网的拓扑结构做了简要介绍,最后对光纤接入网的发展趋势做了展望。     

关于现代通信的用户接入网

简要介绍了用户接入网的定义及其特点；阐述了现代接入网技术的发展以及光纤接入方式、光纤同轴混合接入方式、高速数字用户环路、非对称数字用户环路、无线本地环路等５种主要的接入方式。     

光纤接入网中几种实现方案的比较

主要介绍了光纤接入网的概念、接入方式及几种光纤接入网络的技术实现方案。     

发展荆州市农话接入网的探索

以荆州市农话接入网为例，分别介绍了光纤主系统，无线数字集线器接入系统，集成倍增接入系统。     

宽带接入网技术及发展前景

本简要介绍了宽带接入网的有关概念和特点，论述了光纤接入网，以及光纤接入未形成时的xDSL和Cable Modem等宽带接入技术，最后讨论了宽带接入网未来的发展前景。     

有线接入网技术的发展

按传输媒质的不同，接入网可分成两大类；有线接入网和无线接入网，本文介绍了三种典型的有线接入网，双绞线接入网，光纤接入和混合光纤同轴电缆接入网，并对它们的性能进行了比较。     

光纤接入技术的应用

介绍了在光纤接入方面的一些技术应用 ,在简要介绍了接入网的基础上 ,对 WDM、非相干光源等新的接入技术做了较深入的探讨 ,最后介绍了世界各国在光纤接入网方面的研究情况。     

浅谈光接入网技术及其应用

简要描述了接入网的基本概念及其在现代通信中的重要性。以光接入网为例,着重介绍了当前热门的几种光接入网技术,包括内置SDH接入,光用户环路、混合光纤/同轴接入、ATM技术为基础的无源光网络等,阐明了光接入网的发展前景。     

Fiber to the Home/Fiber to the Premises: What, Where, and When?

After conquering the core and metropolitan networks, fiber is now penetrating into the access domain. Its low loss and huge bandwidth enable the delivery of any current and foreseeable set of broadband services, and also make it a nice match to the wireless link to the end user. Cost effectiveness is a key issue, and will be decisive for the network topology choices. Point-to-point may be the most cost-effective for short-reach access, whereas point-to-multipoint may be the most interesting at medium- to long-reach access, or when line terminations in the local exchange become a key issue. A number of optical techniques being deployed for shared-fiber multiple access are discussed, based on time slot multiplexing, frequency slot multiplexing, code division multiplexing, and wavelength multiplexing, including their application in fiber to the home/fiber to the premises (FTTH/FTTP) networks for fast data transfer (asynchronous transfer mode (ATM) or Ethernet based) and for broadband service distribution (such as CATV). In the research laboratories, techniques aiming at next-generation optical access are being studied, such as wavelength routing for flexible capacity allocation and easily adaptable hosting of services and service providers, and radio-over-fiber techniques creating a powerful symbiosis of the fiber world and the wireless world by enabling centralized radio signal processing.     

光纤光缆最新进展

本文对国内外光缆的最新进展进行了综合分析。针对国内现状,对大芯数光缆、接入网用光缆、ADSS光缆提出了若干建议。同时,还对涉及光纤光缆测量方面的一些新技术作了简单的介绍。     

PON技术及其在铁通接入网中的应用

本文介绍宽带光纤网络的主流接入技术——无源光网络（PON）技术,比较几种PON技术的利弊及适用范围,采用PON技术的优势,以及接入网光进铜退的几种应用模式。     

基于DCF长距离光纤通信系统的色散补偿

通过介绍光纤色散的产生及其对传输系统的影响,引出了色散补偿技术.在多种色散补偿方法中,侧重探讨了色散补偿光纤(DCF)技术.基于DCF在标准单模光纤上传输2245 km的情况下进行了研究,获得了一些对实际色散补偿系统有参考价值的结论.     

一种适合高速铁路的宽带无线接入网络架构

快速发展的高速铁路是需要覆盖移动语音和数据业务的新热点场景,这使得高速铁路宽带无线接入系统成为研究重点。根据高速铁路的特定环境,本文提出了一种基于光载无线通信技术的新型高速铁路宽带无线接入网络架构,阐述了相对应的媒体接入控制方案,并对其移动性管理进行了说明。     

A millimeter wave broadband wireless access technology demonstratorfor the next generation Internet network reach extension

We report design and implementation scenarios for a gigabit-capacity and high-data-rate fixed wireless access technology demonstrator. The system is based on a broadband wireless access concept and implementation techniques utilizing millimeter-wave and newly introduced free-space optical wireless high-speed links. The demonstration platform is to provide broadband “last mile” access and networking solutions to Internet users in densely populated areas with homes and businesses (e.g., building-centric and inner city environments) in need of high bandwidth not served by the fiber infrastructure. The investigation focuses on the radio link design, network architecture, system integration, and a compatible interface to the existing ATM fiber and satellite core networks in support of the next-generation Internet (NGI) reach network extension by the wireless technology     

EPON的网络规划与实现

随着光纤接入的进一步发展, xDSL 向FTTx演进是必然趋势,光纤接入网络将成为城域网/SS(软交换系统) 与家庭网关/IAD(综合接入设备) 之间的主要载体.以太网无源光网络(EPON)作为新一代光网络接入技术, 是实现FTTx 的主要技术之一.文章简要介绍了EPON 的系统结构和工作原理, 重点论述EPON 技术在电信网络中实现的方式,并指出了网络实现中存在的问题, 最后, 展望了EPON 技术的发展前景.     

Design and development of optical fiber joining techniques forefficient construction of aerial distribution cable systems

Two new optical fiber joining techniques have been developed for aerial distribution cables. One employs a compact mass-fusion splicer and the other involves a small mechanical splice. This paper describes their design and performance. These techniques are excellent for use in aerial sites and enable aerial distribution cable systems to be constructed efficiently. They will be useful for the economical construction of optical access networks for fiber-to-the-home     

Performance Evaluation of Symmetric 8 × 10 Gbps TWDM-PON Incorporating Polarization Division Multiplexed Modulation Techniques Under Fiber-Impairments

Today’s access networks are in high demand to fulfill the high bandwidth requirement because of extensive improvement in high transmission rate applications for cloud computing, big data analytics, and other next-generation 5G smart applications. This exponential growth of high capacity and broadband access technologies comprise an essential trend in the development of a passive optical network (PON) access network. In this paper, 80/80 Gbps time wavelength division multiplexing PON (TWDM-PON) incorporating polarization division multiplexing (PDM) based Mach–Zehnder modulator (MZM) and electroabsorption modulator (EAM) techniques have been proposed. The performance of the system consisting of different polarized multiplexed modulation techniques is investigated in both downstream and upstream data transmission for variable transmission distance and received optical power in terms of bit error rate (BER), eye diagrams, power budget (PB) and receiver sensitivity. The results show that the 4?×?20/20 Gbps PDM-EAM modulated signals over 100 km fiber distance at ??60 dBm RS and 70 dB PB are successfully transmitted under fiber non-linearities. The proposed TWDM-PON system provides a next-generation long-reach access network from urban to rural areas.

     

光载无线电(RoF)网络技术

光载无线电(RoF,Radio-over-Fiber)技术是无线宽带接入的发展趋势,这项技术是把射频(RF,Radio Frequency)副载波调制到光载波上,从而在光纤网络中传输。它结合光纤通信和无线通信两大技术,可以实现超过Gb/s的无线业务传输,在未来高速宽带无线通信系统中具有重要的应用。在RoF系统中使用光纤传输的优点是高带宽、低损耗,不受电磁干扰、串扰小,重量轻、投资小、灵活性高等。主要介绍RoF系统的结构,优势、限制以及关键技术等。