heduling purposes. In DC scenarios, two C-RNTIs are independently allocated to the UE, one for MCG and one for SCG. Temporary C-RNTI, which is used during the random-access procedure, is a random value for contention resolution which during some transient states, the UE is temporar- ily identified with a random value used for contention resolution purposes. Inactive RNTI (I-RNTI) is used to identify the UE context for RRC_INACTIVE The following identities are used in NG-RAN for identifying a specific network entity: AMF Name is used to identify an AMF. The AMF Name fully-qualified domain name (FQDN) uniquely identifies an AMF, where FQDN consists of one or more labels. Each label is coded as a one octet-length field followed by that number of octets coded as 8 bit ASCII characters. An AMF Set within an operator's network is identified by its AMF Set ID, AMF Region ID, mobile country code (MCC), and mobile network code (MNC). NR cell global identifier (NCGI) is used to globally identify the NR cells. The NCGI is constructed from the PLMN identity to which the cell belongs and the NR cell identity (NCI) of the cell. It can be assumed that it is equivalent to CGI in LTE system. gNB Identifier (gNB ID) is used to identify gNBs within a PLMN. The gNB ID is con- tained within the NCI of its cells. Global gNB ID is used to globally identify the gNBs, which is constructed from the PLMN identity to which the gNB belongs and the gNB ID. The MCC and MNC are the same as included in the NCGI. TAI is used to identify TAs. The TAI is constructed from the PLMN identity to which the TA belongs and the tracking area code (TAC) of the TA. S-NSSAI is used to identify a network slice. 5G Network Architecture PLMN ID Provisioned identities (Dynamically/semistatically) Assigned identities UE IP (static IP address) UPF IP address (FQDN) GUAMI AMF NAME TAI list allocation UPF IP address (FQDN) policy/rule TAI list 5G-GUTI AMF UE NGAP ID AMF/SEAF AMF NAME SMF/PCF gNB UE NGAP ID gNB ID 5G-GUTI 5G-S-TMSI AMF NAME UPF IP address (FQDN) UPF I