GSM基站网络

GSM 基站网络 GSM 基站网络 ................................................................................................................. 1 一、ＧＳＭ系统结构.................................................. 2 1、系统的组成....................................................................................................... 3 2、交换网路子系统（ＮＳＳ） .......................................................................... 3 3、无线基站子系统（ＢＳＳ） .......................................................................... 3 二、基站的基本类型：................................................ 4 （一）、M＿CELL6机柜 ................................................ 6 （二）、供电部分..................................................... 6 1）．NPSM（Negative Power Supply Module） ......................................................... 6 2）．PDU（Power Distribution Unit） ......................................................................... 6 3）．风扇散热系统：.................................................................................................... 7 （三）、数据模块..................................................... 7 １）．NIU....................................................................................................................... 7 ２）．FOX...................................................................................................................... 7 ３）．FMUX .................................................................................................................. 7 ４）．MCU..................................................................................................................... 8 ５）．BPSM ................................................................................................................... 8 （四）、射频模块..................................................... 8 １）．TCU（Tranceiver Control Unit） ........................