Question: What action does the RNC (Radio Network Controller) take if it receives an MBMS (Multimedia Broadcast Multicast Service) UE Linking Request for a TMGI (Temporary Mobile Group Identity) that has already been linked in the UTRAN (UMTS Terrestrial Radio Access Network)?
Option 1: The RNC will terminate the entire linking process for all TMGIs received in the request.
Option 2: The RNC will send an error message to the UE (User Equipment) and halt further processing of the request.
Option 3: The RNC will consider this specific linking as unsuccessful but proceed with linking the other TMGIs in the request.
Option 4: The RNC will retry the linking process for the specified TMGI after a predefined timeout.
Explanation: This is because, according to the described behavior, if a linking has already been done (or similarly, if a de-linking is requested for a non-existent link), the RNC treats that specific action as unsuccessful but continues with processing the other linking/de-linking requests in the message to ensure partial success and efficiency in managing MBMS Bearer Services.