超宽带室内分布系统的应用

发布时间：2018-01-08 13:08

本文关键词：超宽带室内分布系统的应用　出处：《吉林大学》2012年硕士论文　论文类型：学位论文

【摘要】：近几年，通信领域的室内分布系统进行了大规模的深度覆盖，但随着使用量的增加，同轴分布系统的各种弊端开始显现，如在传输过程中损耗大，无法进行大规模覆盖；由于中继设备底噪高，导致室内呼叫消耗室外资源，，无法有效分担室外宏蜂窝的负荷和扩容压力；由于WLAN业务的增加，需在原有系统中频繁的合路、分路等问题。而超宽带以其独特的优越性逐渐进入人们的视野。超宽带系统采用波分复用技术，可以支持多网络制式于同一根光缆传输，是可以商用化的最简单的新型室内分布技术。超宽带分布系统是由数字POI、数字拉远单元和光覆盖单元组成。分为信源、主干、天馈三个分部。其中，信源是由运营商提供，可多制式输入；主干是由数字POI（即多系统合路平台，POINT OFINTERFACE）和数字拉远通过大量光纤或者网线连接，组网形式灵活，可星型、链型、树型、环型组网。其中，环型组网为最优组网形式，因其可二级备份，且环内任意设备损坏不会影响其他设备运行，极大的降低了数据存储的风险。天馈连接部分同一般传统的分布形式相同，可通过平层分布扩大覆盖范围。对于室外及建筑物内部结构单一的场所，如小区、体育场、机场、会展中心等场所更可直接采用光纤天线系统的方式进行覆盖。本文通过对超宽带的特性和组网结构的探讨研究，阐述了超宽带系统的优越性，具体分为以下几个方面：第一、在话音质量方面，结合超宽带在室内分布系统的实际应用、测试，验证了超宽带系统对室内分布系统在通化质量方面的优化和改善。第二、在带宽方面，超宽带系统把各制式的信源集中在POI处，由POI统一处理后经OSU、ORU输送到末端；相对于传统的同轴分布系统，在末端合路的方式，不仅节省了合路器等器件的使用量，还节省了光缆资源。第三、在组网结构方面，传统分布系统一般分为前后端，以星型、链型结构组网。这种结构，前端一般最多只能带4台后端，且后端越多光衰越大，对设备接收信源信号有较大影响。而超宽带系统可以环形组网，不仅可以双POI备份，且OSU之间最多可串联30台，对后端光衰影响也极小。第四、在投资方面，传统分布系统为了达到较好的场强覆盖，需要在末端合路较多的3G或DSC设备，且由于设备的增加，传输方面也要配备同等的光缆资源，投资较大。超宽带系统在单制式方面虽不具备竞争力，但在多制式合路的情况下，由于节省了信源设备、光缆资源、器件用量，较大的降低了投资造价。本文通过对实验对象开通后的路测，论证了超宽带系统对现网网络的优化强于传统同轴分布，从一定层度上弥补了传统分布系统的不足，对现网网络的质量具有提升意义。
[Abstract]:In recent years , the indoor distribution system in the field of communication has large - scale depth coverage , but with the increase of the use amount , the various disadvantages of the coaxial distribution system begin to appear , such as large loss during transmission and cannot be covered on a large scale ; due to the high noise of the relay equipment , outdoor resources can not be effectively shared , and the problems such as frequent closing and splitting in the original system are required due to the increase of the WLAN service , and the ultra - wide band gradually enters the field of view of people with its unique superiority . The ultra - wideband system adopts wavelength division multiplexing technology , which can support the transmission of multi - network system in the same optical cable , and is the simplest and novel indoor distribution technology which can be commercialized . The ultra - wideband distribution system is composed of digital POI , digital pull - off unit and light - covering unit . The ultra - wideband distribution system is composed of digital POI , digital pull - off unit and light - covering unit . This paper studies the characteristics of ultra - wideband and the structure of networking , expounds the superiority of ultra - wideband system , which is divided into the following aspects : First , in the aspect of voice quality , combined with the practical application and test of ultra - wideband in indoor distribution system , the optimization and improvement of indoor distribution system for indoor distribution system are verified . secondly , in the aspect of bandwidth , the ultra - wideband system focuses the information sources of the various modes at the POI , and is sent to the terminal through the OSU and ORU after unified processing by the POI ; and the method not only saves the usage amount of the combiner and the like in the end closing way , but also saves the optical cable resources . Third , in the aspect of networking structure , the traditional distribution system is generally divided into front and rear ends , and star - shaped , chain - structured networking . The front - end generally can only have 4 back - ends , and the larger the back - end is , the larger the optical attenuation , the more the device receives the source signal . The ultra - wideband system can be used as a ring - networking , not only can double - POI backup , and the maximum number of 30 sets can be connected in series between OSU , and the influence on the back - end optical attenuation is also very small . Fourthly , in the aspect of investment , the traditional distribution system needs more 3G or DSC equipment at the end closing path in order to achieve better field strength , and the same optical cable resources are required to be provided on the transmission side due to the increase of the equipment , and the investment is larger . In the case of multi - mode combining , the ultra - wideband system can save the investment cost because of saving the source equipment , the optical cable resources and the device usage . This paper proves that the optimization of the current network by UWB system is stronger than that of the traditional distribution system , and the defects of the traditional distributed system are compensated by the way of the channel measurement after the experiment object is opened , and the quality of the current network is improved .

【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TN915.03

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