有线宽带FTTB场景升级改造方案研究

Research on the evolutional strategy of fiber to the building access network

随着高清网络电视、4K、3D视频等新兴业务的发展,用户对接入带宽的需求越来越高。山东移动有线宽带客户覆盖主要以FTTH模式为主,FTTB模式为辅。现网采用FTTH建设的家宽,OLT下行至用户可满足带宽升级到100 Mbit/s要求。部分FTTB模式覆盖的用户,单PON口下挂多口的ONU台数较多,带宽不能满足50 Mbit/s以上的接入需求。本文分析了3种FTTB模式升级改造的方案:降低分光比、升级10 GPON和改造为FTTH。3种方式各有优缺点,工程实施中应根据覆盖信息点的情况,采用适合的方式升级改造。

With the development of high-definition TV, 4K, 3D video and other high traffic services, the access bandwidth demand increase day by day. Gigabit Passive Optical Network (GPON) with fiber to the home(FTTH) and fi ber to the building(FTTB) mode is widely utilized in wired access network. GPON with FTTH mode can provide 100Mbit/s bandwidth. FTTB users which linked to one PON port with more than 188 product of ONU port and splitter port cannot meet 50Mbit/s bandwidth. Three evolutional strategies of FTTB access network are analyzed in this paper. Each of the three strategies has its advantages and disadvantages. The implementation of those upgrade strategies should be based on the coverage situation of information point and appropriate ways.