基于FTTH的光网络保护系统的研究

Research of optical network protection system based on FTTH

针对FTTH光纤线路的保护问题,提出了一种无源光网络光纤线路切换保护系统。光纤线路切换设备通过不同的光纤链路连接远端设备的两个光通信端口,当某一个与远端设备连接的分支光纤链路出现故障时,光纤线路切换设备通过连接备用的分支光纤链路,保障通信的及时恢复。实验结果表明,ONU能够在50ms内自动完成在光口1和光口2间的识别与光路保护切换,极大地提高了PON光纤线路保护的可靠性和生存性,有利于FTTH/B的应用。

For FTTH optical line protection problems,a kind of optical line protection switching system on PON is put forward.Optical circuit switching device through different optical fiber link is connected to the two optical communications port of ONU,when a branch optical link occurs fault,optical line switching equipment by connecting the alternate branch optical fiber link,will guarantee the timely restoration of communication.The experimental results show that ONU can automatically recognition and realize optical path protection switching in the optical port 1 and optical port 2 in 50ms.This system greatly improves optical line protection reliability and survivability of PON,is beneficial to promotion and application of FTTH/B.