移动网络组成

• 移动通信网络 = RAN + CN
  • 包含
    • RAN=Radio Access Network=无线电接入网络
      • =Access Network=接入网络
        • Access=接入
        • 接入技术=无线（电）接入技术=radio access technology
          • =空口=air interface
          • =无线电接口=radio interface
    • CN=Core Network=核心网络
  • 举例
    • 单代网络
      • 2G
        • GSM= GRAN + Circuit Core
      • 2.75G
        • EDGE = GERAN + Circuit Core
      • 3G
        • UMTS = UTRAN + Packet Core
        • 架构图
          • 
      • 4G = E-UTRAN + EPC
        • 架构图
          • 
      • 5G = ? + NGC
    • 多代网络
      • 2G 3G 4G COMMUNICATIONS NETWORKS
        • 
  • 对比
    • Circuit and Packet Domains
      • 
  • 名词术语
    • BBU=BaseBand Unit
    • RRH=Remote Radio Heads
    • NGC=Next Generation Core=NG Core=NextGen Core