Question: In Enhanced TNL Address Discovery with X2 Gateway (X2 GW) involvement, what information may an Home eNodeB (HeNB) include in the eNB CONFIGURATION TRANSFER message to indicate its capability?
Option 1: Only its own IP address for direct X2 connectivity
Option 2: The IP address of the Mobility Management Entity (MME) for S1 interface configuration
Option 3: Details about its supported wireless communication bands
Option 4: The IP address of the X2 GW to which it is connected, indicating support for indirect X2 via that gateway
Explanation: This option is correct because, according to the Enhanced TNL Address Discovery procedure with an X2 GW, an HeNB may include the IP address of the X2 GW in the eNB CONFIGURATION TRANSFER message. This inclusion specifically indicates the HeNB's support capability for indirect X2 connectivity via the specified X2 GW, facilitating more flexible and potentially more reliable network architecture configurations.