5.4.3.Elements of access and core networks

• LTE 架構

  • U-TRAN: Evolved Universal Terrestrial Radio Access Network (=RAN)

  • EPC: 核心網路, Evolved Packet Core

• Access network (RAN)

  • 包括了UE + eNB, 兩者間透過LTE-Uu做無線通訊

    • eNB(eNodeB):

    • UE

  • LTE-Uu可分三層:

    • Layer 3: NAS, RRC

    • Layer 2: PDCP, RLC, MAC

    • Layer 1: PHY: 將資料轉為實體訊號發送

    
• Core network (EPC)

  • MME(Mobile Management Equipment): UE attach handling, Get all eNB request and verify users

  • SGW (Serving Gateway): local anchor for mobility

  • PGW (Packet Data Network Gateway): allocate IP address, QOS control, packet filtering

  • Rest of the world (Internet)

  • HHS: registration management, User subscription details

  • PGRF