Question: What is the purpose of the Global eNodeB-ID, and how is it constructed?
Option 1: The Global eNodeB-ID is used to identify UE globally, and it is constructed by concatenating the MCC, MNC, and IMSI.
Option 2: The Global eNodeB-ID is used to identify eNodeBs locally, and it is constructed by concatenating the TAC, PCI, and eNodeBID.
Option 3: The Global eNodeB-ID is used to identify eNodeBs globally, and it is constructed by concatenating the MCC, MNC, and eNodeBID, with a subdomain name derived from the MNC and MCC.
Option 4: The Global eNodeB-ID is used to identify cells globally, and it is constructed by concatenating the ECGI, TAC, and PCI.
Explanation: The correct answer is Option 3 because the Global eNodeB-ID is indeed used to identify eNodeBs globally, and its construction involves the concatenation of MCC, MNC, and eNodeBID, with a subdomain name derived from the MNC and MCC. This ensures that each eNodeB has a unique identifier that can be used across different networks and domains.