GPON在小区宽带接入中的应用

发布时间：2018-04-23 21:46

本文选题：宽带接入网 + GPON　；参考：《兰州交通大学》2015年硕士论文

【摘要】：GPON是Gigabit-capable PON的简称,意思是吉比特无源光纤网络,即GPON中不含有源元件。它作为一种新兴的技术,与以前的PON标准相比较,具有很大的优势。GPON选用非对称机制传送信息,下行传输速度为2.5Gbit/s,上行传送速度为1.244Gbps,符合人们上传少下载多的特点,节省网络资源;不仅支持APON/BPON的相关的OAM功能,还提供了的业务管理与网络监测功能,功能强大;DBA算法让GPON灵活地分配带宽,能保障多个业务的服务品质,有QoS保障;支持TDM服务,不仅能够支持ATM信元,还可以支持GEM帧,具备很高的支持业务的水平;支持全业务如视频、语音、数字等的传送;GEM的帧协议提供各种不同长度的封装,它对业务不做协议变换,只做一般的普通映射,过程简单,花费小、封装效率高,能够最大程度地使用资源,工作灵活;上行传输时选用时分复用的技术传送,下行选用广播的技术传送,两种方法均能使光网络单元共享传送线路与设备资源,节约成本;覆盖范围大,理论距离为60公里,实际覆盖超过20公里;选用了目前世界上最好最先进的加密方法,即AES标准,安全性大大提高。GPON系统一般选用星型或者树型的拓扑结构来组网,由光线路终端、光分配网、光网络单元三部分构成。本论文重点探讨了GPON技术在宽带小区的应用。首先,本论文介绍了该课题的研究意义与背景,还有光接入网与GPON技术目前的国内外研究状况;然后,介绍了GPON技术的概念、技术的特点、基本的网络结构和工作原理等,通过学习这些知识,认识到GPON应用到宽带接入网中的必要性;再者,从资源情况、地区现状分析、业务需求和用户分析四个方面详细介绍了临夏移动宽带接入现状,并且就城区、乡镇、农村三个方面介绍了临夏移动目前的建设策略,从网络建设规划与网络配置规划两方面对临夏移动GPON组网进行了介绍;最后,以临夏市民主西路香苑小区的宽带接入案例为例,对其背景做了介绍,从建设方案、线路方案如接入管线、综合布线、光电缆布线和设备布线等、工程设备选型、投资估算和效益分析等四个方面介绍了香苑小区GPON组网内容,验证了上述组网的合理性,并且表明GPON在宽带接入网中的优势地位;最后,总结了本论文的主要内容,并对GPON目前存在的需要解决的问题做了展望。
[Abstract]:GPON is the abbreviation of Gigabit-capable PON, meaning Gigabit passive fiber network, that is, GPON does not contain source elements. As a new technology, compared with the previous PON standard, it has a great advantage. GPON uses asymmetric mechanism to transmit information. The downlink transmission speed is 2.5Gbit / s, and the uplink transmission speed is 1.244Gbps. it accords with the characteristics that people upload, download less and download more. It not only supports the related OAM functions of APON/BPON, but also provides the service management and network monitoring functions. The powerful DBA algorithm enables GPON to allocate bandwidth flexibly, which can guarantee the service quality of multiple services and the QoS guarantee. Support for TDM services, not only can support ATM cells, but also can support GEM frames, with a very high level of support services; support for all services such as video, voice, digital transmission of gem frame protocol to provide a variety of different lengths of encapsulation, It does not change the protocol to the service, only makes the general general mapping, the process is simple, the cost is small, the encapsulation efficiency is high, can use the resources to the greatest extent, the work is flexible, when the uplink transmission uses the time division multiplexing technology transmission, The two methods can make the optical network unit share transmission line and equipment resources, save the cost, have a wide coverage range, the theoretical distance is 60 km, and the actual coverage is more than 20 km. In this paper, the best and most advanced encryption method in the world, that is, AES standard, is selected. The security of .GPON system is greatly improved. Generally, star or tree topology is used to form the network, which is composed of three parts: optical line terminal, optical distribution network and optical network unit. This paper focuses on the application of GPON technology in broadband community. First, this paper introduces the research significance and background of this topic, and the current research status of optical access network and GPON technology at home and abroad, then, introduces the concept of GPON technology, technical characteristics, basic network structure and working principle, etc. By studying these knowledge, we realize the necessity of GPON application in broadband access network. Furthermore, we introduce the current situation of Linxia mobile broadband access in detail from four aspects: resource situation, regional status analysis, service demand and user analysis. It also introduces the current construction strategy of Linxia Mobile from three aspects: urban area, township and rural areas, and introduces Linxia Mobile GPON network from two aspects: network construction planning and network configuration planning. Taking the case of Xiaoxi Road Xiangyuan District in Linxia City as an example, the paper introduces its background, including construction scheme, line scheme such as access pipeline, comprehensive wiring, optical cable wiring and equipment wiring, and the selection of engineering equipment. Four aspects of investment estimation and benefit analysis are introduced, including the content of GPON network in Xiangyuan district, the rationality of the above network, and the superiority of GPON in broadband access network. Finally, the main contents of this paper are summarized. The problems that need to be solved in GPON are prospected.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.1

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