Question: What should a User Equipment (UE) do when receiving an RRC message with invalid abstract syntax on certain channels?
Option 1: Send an error report to the network.
Option 2: Attempt to correct the syntax error.
Option 3: Ignore the specific field with the error.
Option 4: Ignore the entire message.
Explanation: When a UE receives an RRC message on certain channels (BCCH, CCCH, PCCH, MCCH, or SBCCH for PC5) and detects that the abstract syntax is invalid due to one or more fields having undefined values, it should ignore the entire message. This approach ensures error handling at the message level, as it may not be possible to reliably identify which specific field contains the error.