School of Specs 23.369v20.0.0

3GPP 23.369 v20.0.0 — the document's own text

4.6.2.3 Protocol Stack between AF and AIoT Device for NG-RAN Indirect Connectivity

Figure 4.6.2.3-1: Protocol Stack between AF and AIoT Device for Indirect Connectivity via AMF option
Figure 4.6.2.3-1: Protocol Stack between AF and AIoT Device for Indirect Connectivity via AMF option

Legend:

  • AIoT Data: It is the application data exchanged between the AIoT Device and the AF.
  • AIoT NAS: The NAS protocol between AIoT Device and the AIOTF.
  • AIoT AS: It is between the AIoT Device and the NG-RAN as specified in TS 38.300 [5].
  • NGAP: Application Layer Protocol between the AMF and the NG-RAN as defined in TS 38.413 [10].
  • NGAP AIoT Information: It is the subset of NGAP information that the AMF transparently relays between the NG-RAN and the AIOTF, and is included in the NGAP messages and the AIOT3 messages.

NOTE: From the NG-RAN perspective, there is a single termination of N2 i.e. the AMF.

In the Indirect Connectivity option, the AMF is involved and its functionality is as defined in clause 4.5.7. The AIoT NAS messages between the AIoT Device and the AIOTF are transferred via the NG-RAN and AMF transparently.