Question: In E-UTRAN, when a recommended eNB for paging is a Home eNodeB (HeNB) behind a HeNB Gateway (HeNB GW), how is the paging target identified?
Option 1: By the eNB Identity
Option 2: By the Tracking Area Identity (TAI)
Option 3: By the Cell ID
Option 4: By the UE's IMSI
Explanation: This is because, as specified in the context of optimizing signaling load for paging, when a recommended eNB is a HeNB behind a HeNB GW, the paging target is uniquely identified by the Tracking Area Identity (TAI) instead of using the eNB's identity. This approach ensures efficient paging even in scenarios involving HeNBs connected through gateways.