Feature Description

SMF supports cause IE on N11 interface message. With this feature:

  • SMF supports sending and handling the received causes, which are available in Cause IE. For this support, SMF complies with the 3GPP TS 29.502 version 15.4.0.0, section 6.1.6.3.8.

  • SMF supports the following 3GPP Change Requests (CR):

    • 3GPP TS 29.502, CR 0097 to send the new "INSUFFICIENT_UP_RESOURCES" cause information.

    • 3GPP TS 29.518 CR 161 not to support the UE_IN_NON_ALLOWED_AREA cause in N1N2 Message Transfer Error from AMF.

  • SMF supports the statistics for the causes on the N11 interface messages.