-低压电力线载波集中抄表系统 - 通信系统参考模型-国家电网公司VIP免费

低压电力线载波集中抄表系统第二部分：数据通信协议第一篇：通信系统参考模型Automatic Meter Reading System UsingLow-Voltage Distribution Line CarrierPART 2: Data Communication ProtocolsSECTION 1: Reference Model of Communication System陕 西 电 力 公 司 企 业 标 准XX/X XXXXX-2011青岛东软电脑技术有限公司××××-××-×× 发布××××-××-×× 实施XXX ××.××. ××XX ××目 次引言...........................................................................................................................................................II1范围...............................................................................................................................................12引用标准.......................................................................................................................................13参考模型描述...............................................................................................................................33.1概述...........................................................................................................................................33.2OSI 模型的基本原理................................................................................................................33.2.1分层结构...............................................................................................................................33.2.2服务和协议...........................................................................................................................33.3参考模型...................................................................................................................................43.3.1最小的三层结构...................................................................................................................43.3.2基本传输原理.......................................................................................................................53.3.3物理层 Ph...