In non-roaming scenario, only NEF will provide IRI-POI and CC-POI.
In roaming scenario, V-SMF shall provide the IRI-POI and CC-POI functions for the visited network while NEF in the home network provides IRI-POI and CC-POI.
LI for NIDD using NEF in the VPLMN is described in clause 18.104.22.168.2
. LI for NIDD using NEF in the HPLMN is described in clause 22.214.171.124
Packet header reporting, non-3GPP access and MA-PDU session are not applicable to NIDD.
This clause describes the LI for NIDD using NEF in the VPLMN. The access method for the delivery of xCC related to NIDD using NEF is based on duplication of packets without modification of the packets at the V-SMF (in case of roaming) and NEF in the home network. The duplicated packets with additional information in a header are sent to MDF3 via LI_X3 for further delivery to the LEMF via LI_HI3. Figure 7.8-5
gives a reference point representation of the LI architecture with V-SMF as a CP NF and UP NF providing the IRI-POI and CC-POI functions for NIDD using NEF in the visited network.
The LIPF present in the ADMF provisions the intercept information associated with the following target identities to the IRI-POI present in the V-SMF:
The interception performed on the above three identities are mutually independent, even though, an xIRI may contain the information about the other identities when available.
The IRI-POI present in the V-SMF handles the same records included in xIRIs for NIDD using NEF as those identified in clause 126.96.36.199
PDU session establishment.
PDU session modification.
PDU session release.
Start of interception with established PDU session.
For NIDD using NEF with or without roaming situation, the IRI-POI present in the H-SMF shall avoid generating xIRIs since NEF always provides the xIRIs for the home network.
In non-roaming scenario, the SMF will provide an IRI POI while UPF shall include a CC-POI.
In roaming scenario, V-SMF and H-SMF shall provide the IRI-POI and V-UPF and H-UPF shall include the CC-POI function as shown in Figure 6.2-4
which also concerns IRI-POI and CC-POI functions for IP-based and Ethernet-based PDU sessions.
The LI architecture for SMF/UPF for NIDD using a PtP N6 tunnel is the same as presented in Figure 6.2-4
However, the user plane packets between UE and UPF flow through the SMF as shown in Figure 7.8-2
and Figure 7.8-4
The same xIRIs defined in clause 188.8.131.52
. for PDU sessions of IP or Ethernet type and the same xCC are also considered for PDU sessions for NIDD using a PtP N6 tunnel, considering unstructured payload format.