Топология оптических сетей FTTH (Fiber-to-the-Home)

This article describes different architecture of access networks, access protocols; also, we analyzed the characteristics of optical networks FTTH (Fiber to the Home). The optical fiber with today is the main transport medium in the backbone and metro network. Using of fiber optic cable instead of copper cable has allowed to significantly increasing the quality of service. The greatest potential for broadband networks today have a fiber-optic technology under the general term FTTX (Fiber To The X - fiber to the X point), in which from the node connection to a specified location (point X) comes optics, and then to the subscriber - copper cable (and possible option, in which optics routed directly to a subscriber unit). Fiber optic access networks currently based on different architectures and technologies. Standards for these technologies and available of equipment make development of service-provider networks without risks. The success of their work stimulate to the dynamic development of the industry. Nowadays the PON architecture became very popular. The main factors of the most configurations of Ethernet FTTH it is the flexibility of the business model and the ability to support future services.В настоящее время архитектуры на базе PON получили большое распространение. Основными факторами большинства конфигураций Ethernet FTTH является гибкость бизнес-модели и способность поддерживать будущие сервисы. В этой статье описываются различные архитектуры сетей доступа, рассматриваются протоколы доступа, а также анализируются характеристики оптических сетей FTTH (Fiber to the Home). Успешность их деятельности является стимулом к динамичному развитию этой отрасли

Power Fiber to the Home Opens Up a New Approach of Integration of Three Networks

AbstractThis thesis analyzes the development trend of power fiber to the home (PFTTH) and the current domestic situation of the integration of three networks. It develops its research about the integration system constitution of three networks based on power fiber to the home and proposes the research, development and implementation of power fiber to the home, which not only establishes new “information highway” based on the smart power grid, but also guarantees the realization of the state's planning objective of the integration of three networks to enable the rapid development of information industry in Chin

Design and Analysis of an FTTH-GPON in a Residential Area

FTTH design is a crucial step to ensure the best performance of the optical link. In this paper, an FTTH-GPON network is designed, and its performance is analyzed using an optical link power and rise time budget. In the residence of 254 users, at least eight feeder cable cores are needed, with respective ODCs and ODPs. The design satisfies the link power budget with the lowest power margin of 2.469 dB/2.826 dB upstream/downstream in its furthest distance. The highest rise time for the system is 0,2236 nm. The FTTH configuration satisfies ITU-T G.984.1 GPON standard

Develop a FTTH network management system using visual basic

This paper proposed an efficient network management software tool named Smart Access Network _ Testing,Analyzing and Database (SANTAD) for remote control, inservice transmission surveillance, centralized monitoring, and fault detection for fiber-to-the-home (FTTH) using Visual Basic programming. A virtual network is setup to operate the software tool from central office (CO) or remote point.This program is able to prevent and detect the occurrence of fault in network system through event identification against optical signal level, attenuation, and losses.SANTAD enable each status of transmission link to be displayed a single screen with capability to configure the attenuation and detect the failure simultaneously

Automatic map-based FTTx access network design

Several mature and standardized optical access network technologies are available for network operators providing broadband services, being now in deployment phase; therefore cost estimation, business analysis, efficient deployment strategies, network and topology design issues for FTTx access networks play an increasingly important role regarding profitability and market success. In a competitive environment, techno-economic evaluation supports the optimal choice among available technologies. Even the tradeoff between future proof technical superiority and short term investment minimization requires a farseeing decision. In our point of view, cost estimation and techno-economic evaluation is strongly related to strategic network design: among others the uneven population density, irregular street system or infrastructure have significant impact on the network topology, thus the deployment costs as well. In order to deal with these aspects, a high-level, strategic network design is necessary that adapts to geospatial characteristics of the services area, providing accurate and detailed network information for the techno-economic evaluation [1]. We have developed a topology designer methodology that supprts the above requirements, providing (near) optimal topology of the fully or partially optical access network, based on the geospatial information about the service area: digital maps, existing infrastructure and subscriber database. Automatic topology design for large-scale service areas, with 10.000s of subsribers is a highly complex mathematical problem. The tough algorithms for a near optimal, yet efficient solution. The developed algorithms were evaluated regarding their speed and accuracy. Based on topology design results, a detailed and flexible techno-economic comparison is carried out, since the framework handles various broadband access network technologies, as presented in a case study. --Topology design,Strategic Design,Network planning,GIS,Map,Techno-economic,Cost estimation

Linear Protection Schemes Analysis in Scattered Placement Fiber-To-The Home-Passive Optical Network Using Customer Access Protection Unit Solution

<STRONG>Problem statement:</STRONG> This study highlights on restoration scheme proposed against failure in working line at the drop region for Fiber-To-The Home (FTTH) with a Passive Optical Network (PON). Whereas PON is a system that brings optical fiber cable and signals all or most of the way to the end user.<STRONG> Approach:</STRONG> Survivability scheme against failure is focused on scattered residence architectures and it is applied in the ring and tree topology respectively by means of Customer Access Protection Unit (CAPU). CAPU will be installed before the ONU and ensure the signal will find the alternative path when failure occurs at the specific line. Our proposal scheme is low cost and applicable to any residence architecture. The advantage of this scheme is the failure at fiber line can be recovered until three levels to make sure the optic signal flow continuously to avoid any application disturbance. Two type of restoration scheme is proposed by means of linear protection (tree) and migrated protection (ring). FTTH based network design is simulated by using Opti System 7.0 in order to investigate the power output and BER performance at each node in the tree and ring protection scheme in scattered placement. This study we perform an analysis on linear protection scheme that consisting of two model a) Line to Line (L2L) protection and CAPU to CAPU (C2C) or Shared protection. However the migration of tree to ring topology to enable the signal flow continuously in the case of failure occurs specifically in random or scattered placement topology has been highlighted in our previous publication. <STRONG>Results:</STRONG> The signal will be divided into section; drop and pass through and the ratio is significant to determine the number of user allowed and achievable distance. Output power for optical nodes could be slightly improved by varying the pass through and drop signal ratio. <STRONG>Conclusion:</STRONG> Our proposal is the first reported up to this time in which the upstream signal flows in anticlockwise in ring topology when the restoration scheme activated