System Architecture for the 5G System
3GPP TS 23.501
3GPP TS 23.501
AMF(Core Access and Mobility Management Function)
SMF (Session Management Function)
PCF (Policy Control Function)
UDM (Unified Data Management)
AUSF (Authentication Server Function)
SDSF (Structured Data Storage Network Function)
UDSF (Unstructured Data Storage Network Function)
NEF (Network Exposure Function)
NRF (NF Repository Function)
NSSF (Network Slicing Selector Function)
UPF (User Plane Function)
MME (Mobility Management Entity)
HSS (Home Subscriber Server)
PCRF (Policy & Charging Rules Function)
SGW (Serving Gateway)
PGW (Packet Gateway)
4G/5G 功能比較
橫軸為4G原本Function,縱軸為5G Function,打勾為兩者互相對應部分。
參考來源:
https://medium.com/@sarpkoksal/core-network-evolution-3g-vs-4g-vs-5g-7738267503c7
DU沒有辦法離RUs太遠 (within 1ms),因為MAC schedules需要即時調度RU。