GPON系统ONU-MAC层下行链路的研究及FPGA设计  

Research on the ONU-MAC Layer Downlink of GPON System and Design in FPGA

作　　者：郑杭波[1] 孟利民[1] 刘磊[1] 赵城[1] 

机构地区：[1]浙江工业大学浙江省光纤通信技术重点研究实验室,浙江杭州310014

出　　处：《中国有线电视》2009年第8期842-846,共5页China Digital Cable TV

摘　　要：GPON系统相关协议较复杂、实现难度大、涉及面广,所以在设计过程中采用分层的设计方法。针对GPON的分层结构,在原有的基础上进一步研究GPON MAC层的关键技术,包括物理媒介相关层(PMD层)、TC(传输汇聚)子层、帧格式、PLOAM信息的操作管理、开销字节的安排、物理层维护信元的分配、测距、安全、动态带宽分配、突发同步等,这些功能映射的过程需要用硬件描述语言(HDL)来对这些功能进行描述,并使用电子设计自动化工具来将这些描述综合成相应的硬件集成电路,熟悉时钟的提取和同步并进行同步以及硬件操作时的速率匹配问题,主要针对下行链路的设计。Because of the complexity of GPON system related Recommendation and the difficulty of implementation, we adopt hierarchy method in the design process. According to the layered structure of GPON and on the basis of GPON, This thesis further researches the key techniques of the GPON MAC layer, including physical media related layer （PMD）, TC, frame format, PLOAM information operations, arrangement of overhead bytes and the dynamic bandwidth allocation, ranging, safety, and synchronization of physical layer maintenance cell. The process of the function mapping needs hardware description language （HDL） to describe the function and uses automation electronic design tool to synthesize these description into the corresponding hardware circuits. Being Familiar with the extraction and synchronization of the clock and the rate matching problem during the hardware operating process are mainly focus on the design of the downlink.

关 键 词：GPON MAC层 GEM帧 QUARTUSII ArriaTMGX VERILOGHDL语言 

分 类 号：TN929.1[电子电信—通信与信息系统]