无源光网络标准发展及关键技术研究

Development of Standards and Research on Key Technology in Passive Optical Network

无源光网络(Passive Optical Network,PON)作为当今接入网的主要技术解决方案,具有带宽使用效率高、传输距离远、抗干扰能力强等特点.通过研究PON技术的发展动态,本文首先归纳了各种PON技术的产生背景和应用特点,整理出各技术间的连接关系及主要标准;其次介绍了PON技术的帧结构,并对带宽、波长、传输模式等PON技术的主要参数进行了汇总;然后将国内外研究热点进行划分,围绕媒体访问控制协议、帧结构、动态带宽分配算法、节能机制等关键技术,阐述了其研究现状及在PON中的重要作用;最后对PON技术的发展趋势进行了展望.

Passive optical network（PON）, as the major technology solution of the access network, provides higher bandwidth utilization efficiency, supports for farther transmission distance and has the stronger anti-interference capability than the traditional access network technology.According to the development of PONs,this paper firstly summarizes the background and features,sorts out relationship and main standards. Secondly, the frame structures of various PONs are introduced and a noble table containing the main parameters of PONs is presented. Based on the current hot spots of researches at home and abroad, the overview is focused on the media access control protocols,frame structures, dynamic bandwidth allocation algorithms,energy saving,and so on.Finally, we show the idea about the future development trends of PONs.