基于以太网的无源光网络(EPON)系统的研究与实现

Investigation and Implement of Ethernet on Passive Optical Networks System

在分析EPON协议的基础上,对EPON的网络结构、层次模型以及各项关键技术进行了研究,包括多点控制协议、连接初始化过程及冲突解决、测距和时延补偿技术、动态带宽分配技术、突发同步技术、信息搅动技术、前向纠错技术等．采用100M的外围以太网芯片与FPGA相配合的硬件:方案,研制了一套带局端设备(OLT)和用户端设备(ONU)的EPON实验系统．测试结果表明,系统性能达到了EPON技术对丢包率和带宽的要求．

Based on the analysis of the protocol of EPON , the EPON network structure, layering model and the key technologies are investigated , including MPCP protocol, connection control, time model, dynamic bandwidth allocation, burst synchronization, information churning, FEC, etc. Combining the peripheral 100M Ethernet chips with FPGA schemes , one experiment EPON system with OLT and ONUs is accomplished . The testing results show that the packet loss rate and the bandwidth prop erties are content with the EPON performance requirement .