ICS 33.040.50 M 42 中华人民共和国 通信行业标准 YD/T XXXX.1 —202X 接入网技术要求 50Gbit/s 无源光网络 第 1部分：总体要求 Technical requirements for access network--50-Gigabit-capable passive optical network (50G PON)--Part 1: General requirements （报批稿） 201X - XX - XX发布 201X - XX - XX实施 中华人民共和国工业和信息化部    发 布 YD YD/T XXXX.1—201X I目  次 1 范围 ………………………………………………………………………………………………………… 1 2 规范性引用文件 .............................................................................................................................................. 1 3 术语和定义 ...................................................................................................................................................... 2 4 缩略语 .............................................................................................................................................................. 3 5 50G PON系统概述 .......................................................................................................................................... 5 5.1 网络参考配置 ..................................................................... 5 5.2 50G PON工作波长范围 ............................................................. 7 5.3 共存环境下 ODN的结构 ............................................................. 7 5.4 UNI和SNI ........................................................................ 9 5.5 50G PON光网络的分层结构 ........................................................ 10 6 系统承载能力要求 ........................................................................................................................................ 11 6.1 时延 ............................................................................ 11 6.2 最大以太网帧长 .................................................................. 12 6.3 2048kbit/s 电路仿真专线 ......................................................... 12 6.4 VoIP 质量 ....................................................................... 12 6.5 同步特性和质量 .................................................................. 12 6.6 服务质量（ QoS） ................................................................. 13 7 物理层要求 .................................................................................................................................................... 13 7.1 光纤特性 ........................................................................ 13 7.2 50G PON的光波长 ................................................................ 13 7.3 比特率 .......................................................................... 13 7.4 光功率预算 ...................................................................... 13 7.5 分光比 .......................................................................... 13 7.6 光纤距离 ........................................................................ 14 8 系统级要求 .................................................................................................................................................... 14 8.1 认证/加密 ....................................................................... 14 8.2 动态带宽分配 (DBA) ............................................................... 14 8.3 多速率支持 ...................................................................... 14 8.4 异常发光 ONU/OLT的检测和消除 .................................................... 14 8.5 节能要求 ........................................................................ 14 8.6 人眼安全 ........................................................................ 14 8.7 基本承载功能 .................................................................... 15 8.8 切片要求 ........................................................................ 15 8.9 上行方向灵活 FEC功能（可选） .................................................... 15 8.10 保护倒换 ....................................................................... 15 YD/T XXXX.1—202X II9 管理维护要求 ................................................................................................................................................ 15