吉比特无源光网络的媒质接入控制层技术探讨

Discussion on Medium Access Control Layer Technology of Gigabit Passive Optical Network

GPON关键技术研究对接入网光纤化实现具有重要意义。以某通信设备制造商产品研发为背景,综合考虑光网络发展方向,目前技术实现条件等因素,实现商用GPON网络需要解决许多关键技术,包括用户信息安全性,TDM处理技术,测距及时延补偿,媒质接入控制技术等。围绕GPON网络中媒质接入控制层关键技术研究,介绍GPON体系结构与封装方式;研究测距与时延补偿技术,ONU必须严格按授权发送数据,避免上行带宽冲突使得ONU具有相同逻辑距离;分析现有DBA算法研究现状,比较代表性算法优缺点;提出GPON上行动态带宽分配算法,可以满足多业务服务等级要求带宽分配方案。

The research on the key technologies of GPON is of great significance to the realization of optical fiber access network.Taking the product development of a communication equipment manufacturer as the background and comprehensively considering the development direction of optical network,current technical implementation conditions and other factors,the realization of commercial GPON network needs to solve many key technologies,including user information security,TDM processing technology,ranging and timely delay compensation,media access control technology and so on.Focusing on the research on the key technologies of medium access control layer in GPON network,the GPON architecture and packaging mode are introduced;Research on ranging and delay compensation technology,ONU must send data strictly according to authori zation to avoid uplink bandwidth conflict,so that ONU has the same logical distance;The research status of existing DBA algorithms is analyzed,and the advantages and disadvantages of representative algorithms are compared;A GPON uplink dynamic bandwidth allocation algorithm is proposed,which can meet the bandwidth allocation scheme of multi service service level requirements.