Question: In a Radio Bearer Setup procedure, what is the expected response from the User Equipment (UE) to the Serving System (SS), and on which channel is it sent?
Option 1: RADIO BEARER SETUP FAILURE message on the DTCH (Dedicated Traffic Channel)
Option 2: RADIO BEARER SETUP COMPLETE message in RLC Transparent mode on the CCCH (Common Control Channel)
Option 3: RADIO BEARER SETUP COMPLETE message in RLC Acknowledged mode on the DCCH (Dedicated Control Channel)
Option 4: RADIO BEARER RECONFIGURATION message in RLC Unacknowledged mode on the BCCH (Broadcast Control Channel)
Explanation: The correct answer is Option 3 because, according to standard telecom procedures for setting up a radio bearer, once the UE receives a RADIO BEARER SETUP message from the SS, it responds with a RADIO BEARER SETUP COMPLETE message. This response is sent in RLC Acknowledged mode to ensure reliable delivery, and it is transmitted on the DCCH, which is established during the RRC Connection Establishment procedure for dedicated control signaling between the UE and the network.