PDU UE Synchronization Procedure

This section describes the UE synchronization procedure.

  1. PDU UE synchronization procedure in idle mode receives the failed QFIs, QoS rules and EBIs.

  2. UE synchronization procedure fills N1 message PDU Session Modification command with QoS Descriptions, QoS Rules, and EPS Bearer Context from received QFI, QoS rule ID, and EBI respectively.

  3. The SMF includes the created N1 container to N11 message without any N2 content.

  4. The SMF sends N1N2 Transfer Request message towards AMF and starts the N1N2 retransmission timer. The SMF waits for N1N2 Transfer Response.

  5. If N1N2 Transfer Success is received, the SMF waits for SM Context Update Request with N1 update. The N1 update includes resource modify success/resource modify reject information.