Question: What is the condition under which the measurement of successful WLAN additions to the LWA WLAN mobility set is triggered?
Option 1: On receipt of RRCConnectionReconfiguration message by the UE.
Option 2: On transmission of RRCConnectionReconfigurationComplete message by the eNB, corresponding to the received RRCConnectionReconfiguration message which includes the wlan-ToAddList in the lwa-MobilityConfig of lwa-Configuration information element.
Option 3: On receipt of RRCConnectionReconfigurationComplete message by the eNB, corresponding to the transmitted RRCConnectionReconfiguration message which includes the wlan-ToAddList in the lwa-MobilityConfig of lwa-Configuration information element.
Option 4: On transmission of RRCConnectionReconfiguration message by the UE.
Explanation: The measurement is triggered when the eNB receives an RRCConnectionReconfigurationComplete message from the UE, which corresponds to a previously transmitted RRCConnectionReconfiguration message that included the wlan-ToAddList in the lwa-MobilityConfig of lwa-Configuration information element. This indicates that the WLAN addition has been successfully configured and added to the LWA WLAN mobility set.