一种EPON干线冗余保护技术

A redundancy protection technology of EPON trunk

提出了一种以太网无源光网络(EPON)干线冗余保护技术.该技术远端节点使用2×N树型分路器,OLT端使用两个光模块和相关的高速差分开关以及复杂可编程逻辑器件(CPLD)控制.CPLD通过对光模块的无光警告(Rx-LOS)和发射告警(Tx-Fault)信息的监测和分析来控制高速差分开关的倒向,实现了对EPON干线的1+1冗余保护,并对OLT的PON接口光模块进行了1+1冗余保护.该技术完全在物理层自动完成,无需上层协议的支持,具有快速切换和业务恢复时间短等优点.

Proposed a 1+1 redundancy protection technology of ethernet pasive optical network(EPON) trunk which using the 2×N tree splitter in the remote node and using dual optical transceivers with relevant high-speed difference switch and complex programmablelogic device(CPLD) control logic in the OLT.CPLD monitored and analyzed the Rx-LOS and Tx-Fault information of these two transceivers and controlled the direction the high-speed difference switch,thus provides the 1+1 redundancy protection for the trunk fiber a...