5.3.4 AMF Discovery and Selection

For Indirect Connectivity via AMF (see clause 4.2), AMF discovery and selection functionality is implemented in AIOTF.

In this case, the AIOTF is locally configured with the information of the AMF corresponding NG-RAN node(s).

The AIOTF selects the AMF that is corresponding to the selected NG-RAN nodes based on the local configuration in order to forward the AIoT service operation messages towards the selected NG-RAN node(s) (see NG-RAN Node and RAN Reader Selection in clause 5.3.3) via the selected AMF.

NOTE: It is left to stage3 to handle the case that the AMF fails to forward the inventory or command request to the selected NG-RAN. It is up to the operator to ensure local configured AMF corresponding to the NG-RAN do have the NG connection with the AMF during the deployment phase.