N1N2 Retransmission

Once N1N2 retransmission timer expires, following action is taken:

  1. SMF increments the N1N2 retry counter

  2. SMF sends N11N1N2 Transfer Request message towards AMF and restarts the N1N2 retransmission timer. SMF waits for N1N2 Transfer Response.

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

  4. Once the N1N2 retry counter reaches the configured maximum number, the procedure is aborted.