Question: What action(s) does a User Equipment (UE) take when it receives System Information Block 17 (SIB17) with a changed value tag, having previously stored at least one segment of SIB17?
Option 1: Store the new segment and attempt to assemble SIB17-IEs immediately.
Option 2: Discard all previously stored segments, store the newly received segment, and only assemble SIB17-IEs if all segments are received.
Option 3: Ignore the new segment until all previous segments have been successfully assembled into SIB17-IEs.
Option 4: Automatically discard all stored segments without storing the new one, awaiting a full retransmission of SIB17.
Explanation: When a UE receives SIB17 with a changed value tag and has previously stored segments, it must first discard all stored (outdated) segments to ensure data integrity. Then, it stores the newly received segment. Assembly of SIB17-IEs only occurs once all necessary segments have been successfully received, ensuring completeness and accuracy of the system information.