基于同步传输的射频光网络单元设计

RFoG技术在HFC网络双向改造中存在明显的优势,越来越多的运营商采用RFoG组网方案,但是RFoG的射频光网络单元由于光突发模式采用电平控制ONU的开通与关断,造成实现困难。为此,给出了一种基于同步传输的射频光网络单元设计方法,将回传信号数字化,采用和CMTS相同的时分复用技术(TDMA)来控制ONU反向光发射的"突发",从而达到在任一给定的时点只允许一个ONU与CMTS头端保持通信,以弥补其不足。

RF ONU design based on synchronous transmission

RFoG technology has obvious advantages in HFC network two-way reform and more and more operators use RFoG networking scheme,but it is difficult to realize RFoG optical network unit(ONU) because light burst mode uses level to control the ONU on and off. This paper presents a method of designing RF ONU based on synchronous transmission.The signal is digitized and time division multiplexing(TDMA) technology is adopted to control the "burst" from ONU reverse light,so as to achieve the goal that at any given time,only one ONU and CMTS head end is allowed to keep communication.