一种用于软件定义TWDM-PON的光纤故障定位方法

Branch-Fiber Fault Location Method in Software-Defined TWDM-PON

时分波分复用无源光网络(TWDM-PON)汇集了波分复用(WDM)-PON和时分复用(TDM)-PON各自的优势,是下一代PON2(NG-PON2)的理想解决方案。光纤故障定位关系到网络运维,是PON的重要研究领域。TWDM-PON光纤故障定位需要在保证一定事件区分度情况下,能够定位分支光纤故障。将软件定义网络的概念引入TWDM-PON,提出了一种适用于软件定义TWDM-PON(SDTWDM-PON)的分支光纤故障定位方法。该方法工作在位于光线路终端(OLT)的Open Flow控制器上,利用光码分多址接入(OCDMA)编码增益增强方法的动态范围,且可以保证约10 cm的事件区分度。

TWDM-PON （Time and Wavelength Division Multiplexed Passive Optical Networks） gathers the advantages of WDM （wavelength division multiplexed）-PON and TDM （Time Division Multiplexed ） - PON, and is the ideal solution to the next generation-PON2（NG-PON2）. The fiber fault-location involves network operation and maintenance, and is the focus of PON study. TWDM-PON optical fiber fault-location requires the location of branch-optical-fiber fault under the condition of ensuring certain event division, The concept of software-defined network is introduced into TWDM-PON, and the branch-optical-fiber fault location method suitable for software-defined TWDM-PON （SDTWDM-PON） thus proposed. The method works on a OpenFlow controller located on an OLT （Optical Line Termination）, and by utilizing the dynamic range of OCDMA （Optical Code Division Multiple Access） code gain enhancement method, could guarantee the event division of about 10cm.