Question: In a Stand-Alone Gateway deployment supporting SIPTO@LN, what happens to the SIPTO@LN PDN connection after handover, if the source and target eNodeBs (eNBs) are in different Local IP Networks (LHNs)?
Option 1: The SIPTO@LN PDN connection is automatically updated with the new LHN ID.
Option 2: The SIPTO@LN PDN connection is released, unless otherwise specified by the MME.
Option 3: The handover is cancelled to maintain the SIPTO@LN PDN connection.
Option 4: The User Equipment (UE) is redirected to a different Access Point Name (APN).
Explanation: According to the specified behavior for SIPTO@LN support with a Stand-Alone Gateway, if the source and target eNBs are in different LHNs (i.e., have different LHN IDs), the SIPTO@LN PDN connection is released after handover. This ensures network consistency and prevents potential routing issues across different local networks. The MME's decision to release the connection is based on the LHN ID signaled by the eNB, highlighting the importance of this identifier in managing local network boundaries.