Permanent Equipment identifier
A PEI is defined for the 3GPP UE accessing the system. The PEI is the means by which the network identifies the user equipment that is capable of accessing a 3GPP network. The PEI can assume different formats for different UE types and use cases. The UE shall present the PEI to the network together with an indication of the PEI format being used. If the UE supports at least one 3GPP access technology, the UE must be allocated a PEI in the IMEI format. The UE presents the PEI to the network along with an indication of the PEI formats being used. If the UE supports at least one 3GPP access technology, the UE must be allocated a PEI in the IMEI format. In 3GPP Rel-15, the only format supported for the PEI parameter is an IMEI.
Generic Public Subscription Identifier (GPSI) Network Slice Identifiers
The GPSI is used as a means of addressing a 3GPP subscription in data networks outside the 3GPP system. These are public identifiers such as MSISDN. The 3GPP system stores within the subscription data the association between the GPSI and the corresponding SUPI. If MSISDN is included in the subscription data, it will be possible that the same MSISDN value is supported in both 5GS and EPS.
It is used to identify an AMF. It can be configured with one or more GUAMIs. AMF name is a globally unique FQDN (Fully Qualified Domain Name). GUAMI with a distinct AMF pointer value is associated with one AMF only.
Data Network Name
A DNN is equivalent to an APN. The DNN may be used to: select an SMF and UPF(s) for a PDU session. Select N6 interface(s) for a PDU session. It determines policies to apply to this PDU session.
Internal Group Identifier
The Subscription data for a UE in UDR (Unified Data Repository) may associate the subscriber with groups. A group is identified by the Internal Group Identifier. UE can belong to a limited number of groups. The group identifiers corresponding to a UE are provided by the UDM. This information is stored in Charging data record.