Question: During UE (User Equipment) handover from E-UTRAN to 5GS, how are the lower 8 bits of the E-UTRAN MME Group ID mapped to the 5GS identifiers?
Option 1: Entirely into the 5GS AMF Region ID
Option 2: Into both the 5GS AMF Set ID (upper bits) and 5GS AMF Pointer (lower bits)
Option 3: Into bit 9 down to bit 2 of the 5GS AMF Set ID
Option 4: Directly into the 5GS 5G-TMSI
Explanation: According to specified mapping rules for transitioning from E-UTRAN to 5GS, the lower 8 bits of the E-UTRAN MME Group ID are mapped into bit 9 down to bit 2 of the 5GS AMF Set ID, ensuring continuity and correct identification within the new network context.