【摘要】 基于千兆以太网的无源光网络将千兆以太网与无源光纤接入的优势相结合,实现低成本的高速、远距离接入。针对EPON系统上行链路多个ONU共享带宽的树型拓扑结构,为实现EPON系统上行TDMA接入,提出了时间标签法测距方案,论述了方案的可行性并指出其优点。更多还原

【Abstract】 Based on Gigibit Ethernet,EPONs are emerging as a broadband access network technology that can provide a low-cost method of deploying optical access lines between a carrier’s central office and a customer site. Since up-stream traffic is managed utilizing time division multiplexing access, in which transmission time slots are dedicated to the ONUs, the ranging of between OLT and ONUs is necessary. In this paper a novel timestamp ranging scheme is pro-posed and technological underpinnings of the scheme are described in details.更多还原