Question: What type of Cell Identity is used in NG-RAN signalling for User Location Information, Paging Optimization, Area of Interest, and PWS?
Option 1: Served Cell ID
Option 2: Mapped Cell ID
Option 3: Uu Cell ID
Option 4: TAI-based Cell ID
Explanation: According to the 3GPP TS 38.300 specification, the Cell Identity used in NG-RAN signalling for various cases corresponds to a Mapped Cell ID, which is defined in TS 38.413 and TS 38.423. This type of Cell Identity is used to identify the correct target cell and is mapped to geographical areas configured in the RAN and Core Network.