Question: In a UTRAN cell, after changing parameters from T1 to T2 (step d), if the UE fails to respond with a PRACH (URA UPDATE message cause "change of URA") within the allowed time, what action is taken by the SS after waiting for a total of 15s from the beginning of T2?
Option 1: The SS transmits a RRC CONNECTION RELEASE message and ends the procedure.
Option 2: The UE is switched off, and the procedure returns to step a) to activate cell 1-6 with T1 defined parameters.
Option 3: The SS shall transmit a URA UPDATE CONFIRM message and then continues with step g), changing parameters back to T1.
Option 4: The SS initiates a RADIO BEARER SETUP (Step 3) for the UE on Cell 1.
Explanation: According to the procedure outlined, if the UE fails to respond correctly within the allowed time after changing parameters from T1 to T2, and no response is received after waiting for a total of 15s from the beginning of T2, the SS transmits a URA UPDATE CONFIRM message (indicating an expected response despite the UE’s failure to respond as anticipated) and then proceeds with step g), which involves changing the parameters back to T1. This approach ensures continuity in testing under predefined conditions.