Question: During handover of a UE with active emergency bearers to a Closed Subscriber Group (CSG) cell, what action does the target RNC take if the UE is not a CSG member of the target CSG cell?
Option 1: The target RNC accepts all bearers (emergency and non-emergency) and the target SGSN authorizes full service access.
Option 2: The target RNC only accepts the emergency bearers, and the target SGSN releases the non-emergency bearers not accepted by the target RNC.
Option 3: The handover is cancelled to prevent service disruption, and the UE remains in the current cell.
Option 4: The target RNC rejects all bearers, including emergency services, due to CSG membership requirements.
Explanation: This is because, according to the described behavior for handling emergency services during handover to a CSG cell, if the UE is not a member of the target CSG and has active emergency bearer services, the network prioritizes the continuity of emergency services. Thus, the target RNC will only accept the emergency bearers to ensure uninterrupted emergency service access, while non-emergency bearers are managed accordingly by the target SGSN, reflecting the UE's temporary 'emergency attached' status.