The overall network configuration for 5G in a non-roaming scenario with the LI aspects is shown in figure A.1-1 using the service-based representation (as shown in TS 23.501) with the use of point-to-point LI system.
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Figure A.1-1: Network topology showing LI for 5G (service-based representation) with point-to-point LI system
Figure A.1-1 shows the network topology of 5G system in a service-based representation, however, all the LI-related interfaces remain to be point-to-point.
The IRI-POIs present in the AMF, UDM SMF and SMSF deliver the xIRI to the MDF2 and CC-POI present in the UPF delivers the xCC to the MDF3. The MDF3 address to CC-POI present in UPF is provided by the CC-TF present in the SMF over LI_T3 reference point.
The LIPF present in the ADMF provisions the IRI-POIs present in the NFs with the intercept related data. The LI_X1 interfaces between the LIPF and the UPF is to monitor the user plane data.