When Option A described in clause 6.3.1
is used, xIRI provided by the IRI-POI in the SMF+PGW-C based on the events specified in TS 33.107
shall not be generated; the IRI-POI in the SMF+PGW-C shall generate xIRI when it detects the following specific events or information specified in TS 33.128
PDN connection establishment.
PDN connection modification.
PDN connection release.
Start of interception with an established PDN connection.
When EPC/5GC interworking architecture is used, the xIRI for the events listed above are described in clause 126.96.36.199.1.2
For the interception of home routed roaming sessions in the visited network, the POIs and TFs shall be present in the SGW and the SMF in the VPLMN and the xIRI records described in the present clause and clause 188.8.131.52
shall be generated.
For all other cases, the POIs and TFs shall be present in the SMF+PGW-C and SMF+PGW-U as described in clause 184.108.40.206.2
and the following events shall be generated.
The PDU session establishment xIRI is generated when the IRI-POI present in the SMF+PGW-C detects that a PDU session with mapped EBIs has been established for the target UE or that a PDN connection has been established for the target UE.
The PDU session modification xIRI is generated when the IRI-POI present in the SMF+PGW-C detects that a PDU session or EBIs are modified for the target UE or when a target UE's PDN connection from EPC is migrated to the 5GS or when a dedicated EPS bearer is activated or deactivated for the target UE.
The PDU session release xIRI is generated when the IRI-POI present in the SMF+PGW-C detects that a PDU session is released or when the default EBI for a PDN connection is deactivated for the target UE.
The start of interception with an established PDU Session xIRI is generated when the IRI-POI present in a SMF+PGW-C detects that interception is activated on the target UE that has an already established PDU session in the 5GS that has a mapped to PDN connection or an already established PDN connection in EPS. When a target UE has multiple 5GC PDU sessions mapped to multiple PDN connections in EPC or when a target UE has multiple PDN connections in EPC, this xIRI shall be sent for each PDU session and each PDN connection with different correlation information values.
When xIRIs are generated due to the detection of a PDU session with mapped EBIs, no separate xIRIs shall be generated for the same events for the corresponding PDN connection.
When additional warrants are activated on a target UE, MDF2 shall be able to generate and deliver the start of interception with an established PDU session related IRI messages to the LEMF associated with the warrants without receiving the corresponding start of interception with an established PDU session xIRI.
When the warrant requires the packet header information reporting, the following xIRI shall be generated:
The generation of packet header information reporting can be done by either the IRI-POI present in the UPF+PGW-U or the MDF2.