基于EPON的FTTx接入网建设关键问题探讨

Study on the Key Problems of EPON Based FTTx Access Network

基于EPON的FTTx技术具有带宽高、可靠性高、维护成本低、技术成熟等优点,已成为近期各大电信运营商推进"光进铜退"的重要技术。OLT融合了接入、汇聚、交换功能,使EPON技术的引入改变了传统的电信接入网络的架构,打破了传统接入网和汇聚网络明晰的分界线,并且改变了传统的接入、数据、软交换3个专业各自为政的局面,因此如何建设和部署可运营的EPON接入网是个非常重要的问题。本文对基于EPON的FTTx接入网中OLT设备的网络定位、语音业务组网方式、综合化的网络管理架构3个关键问题进行了详细分析。

Due to its advantages of high bandwidth, high reliability, low maintenance cost and good maturity, EPON becomes the key technology of telecom operator to promote fiber-optic access technology instead of cable access technology. Since OLT integrates access, aggregation,soft switch function, the deployment of EPON system in FTYx networks changes the framework of access network, breaks the boundary between access network and aggregation network, and integrates three separate areas： access, data and soft switch. This makes how to construct and operate EPON based FTTx access network a key problem to be further considered. In this paper, the network localization of OLT, implementation of voice service, and network management architecture in EPON based access network are analyzed in detail.