3 Definitions, symbols and abbreviations
38.3043GPPNRRelease 17TSUser Equipment (UE) procedures in idle mode and in RRC Inactive state
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Acceptable Cell: A cell that satisfies certain conditions as specified in 4.5.
Allowed CAG list: A per-PLMN list of CAG Identifiers the UE is allowed to access (see TS 23.501 [10]).
Available PLMN(s): One or more PLMN(s) for which the UE has found at least one cell and read its PLMN identity(ies).
Available SNPN(s): One or more SNPN(s) for which the UE has found at least one cell and read its SNPN identity(ies).
Barred Cell: A cell a UE is not allowed to camp on.
CAG cell: A cell broadcasting at least one Closed Access Group Identifier.
Camped on a cell: UE has completed the cell selection/reselection process and has chosen a cell. The UE monitors system information and (in most cases) paging information.
Camped on any cell: UE is in idle mode and has completed the cell selection/reselection process and has chosen a cell irrespective of PLMN identity.
Closed Access Group Identifier: Identifier of a CAG within a PLMN.
Commercial Mobile Alert System: Public Warning System that delivers Warning Notifications provided by Warning Notification Providers to CMAS capable UEs.
eCall Only Mode: A UE configuration option that allows the UE to register at 5GC and register in IMS to perform only eCall Over IMS, and a non-emergency IMS call for test and/or terminal reconfiguration services.
EHPLMN: Any of the PLMN entries contained in the Equivalent HPLMN list TS 23.122 [9].
Equivalent PLMN list: List of PLMNs considered as equivalent by the UE for cell selection, cell reselection, and handover according to the information provided by the NAS.
Home PLMN: A PLMN where the Mobile Country Code (MCC) and Mobile Network Code (MNC) of the PLMN identity are the same as the MCC and MNC of the IMSI.
HSDN cell: A cell that has higher priority than other cells for cell reselection for HSDN capable UE in a High-mobility state.
Network Identifier: Identifier of an SNPN in combination with a PLMN ID (TS 23.501 [10]).
Non-Public Network: A network deployed for non-public use, as defined in TS 22.261 [12].
Non-terrestrial network: An NG-RAN consisting of gNBs, which provides non-terrestrial NR access to UEs by means of an NTN payload embarked on an airborne or space-borne NTN vehicle and an NTN Gateway.
NR sidelink communication: AS functionality enabling at least V2X Communication as defined in TS 23.287 [16], between two or more nearby UEs, using NR technology but not traversing any network node.
Process: A local action in the UE invoked by an RRC procedure or an RRC_IDLE or RRC_INACTIVE state procedure.
Quasi-earth fixed cell: An NTN cell fixed with respect to a certain geographic area on the earth during a certain time duration. This can be provisioned by beam(s) covering one geographic area for a limited period and a different geographic area during another period (e.g., the case of NGSO satellites generating steerable beams).
Radio Access Technology: Type of technology used for radio access, for instance NR or E-UTRA.
RedCap UE: A UE with reduced capabilities as specified in clause 4.2.21 in TS 38.306 [24].
Registration Area: (NAS) registration area is an area in which the UE may roam without a need to perform location registration, which is a NAS procedure.
Registered PLMN: This is the PLMN on which certain Location Registration outcomes have occurred, as specified in TS 23.122 [9].
Registered SNPN: This is the SNPN on which certain Location Registration outcomes have occurred, as specified in TS 23.122 [9].
Reserved Cell: A cell on which camping is not allowed, except for particular UEs, if so indicated in the system information.
Selected PLMN: This is the PLMN that has been selected by the NAS, either manually or automatically.
Selected SNPN: This is the SNPN that has been selected by the NAS, either manually or automatically.
Serving cell: The cell on which the UE is camped.
Sidelink: UE to UE interface for V2X sidelink communication defined in TS 23.287[16].
SNPN Access Mode: Mode of operation wherein UE only selects SNPNs (as defined in TS 23.501 [10]).
SNPN identity: An identifier of an SNPN comprising of a PLMN ID and an NID combination.
Strongest cell: The cell on a particular frequency that is considered strongest according to the layer 1 cell search procedure (TS 38.213 [4], TS 38.215 [11]).
Suitable Cell: This is a cell on which a UE may camp. For NR cell, the criteria are defined in clause 4.5, for E-UTRA cell in TS 36.304 [7].
U2N Relay UE: a UE that provides functionality to support connectivity to the network for U2N Remote UE(s).
U2N Remote UE: a UE that communicates with the network via a U2N Relay UE.
V2X sidelink communication: AS functionality enabling V2X Communication as defined in TS 23.285 [17], between nearby UEs, using E-UTRA technology but not traversing any network node.
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 [1].
AS Access Stratum
CAG Closed Access Group
CAG-ID Closed Access Group Identifier
CMAS Commercial Mobile Alert System
CN Core Network
DCI Downlink Control Information
DRX Discontinuous Reception
eDRX Extended DRX
ETWS Earthquake and Tsunami Warning System
E-UTRA Evolved UMTS Terrestrial Radio Access
E-UTRAN Evolved UMTS Terrestrial Radio Access Network
GIN Group ID for Network selection
H-SFN Hyper System Frame Number
HRNN Human-Readable Network Name
HSDN High Speed Dedicated Network
IAB Integrated Access and Backhaul
IMSI International Mobile Subscriber Identity
MBS Multicast/Broadcast Services
MBS FSAI MBS Frequency Selection Area Identity
MCC Mobile Country Code
MCCH MBS Control Channel
MICO Mobile Initiated Connection Only
MRB MBS Radio Bearer
MTCH MBS Traffic Channel
NAS Non-Access Stratum
NID Network Identifier
NPN Non-Public Network
NR NR Radio Access
NSAG Network Slice AS Group
NTN Non-Terrestrial Network
PEI Paging Early Indication
PEI-O Paging Early Indication-Occasion
PH Paging Hyperframe
PLMN Public Land Mobile Network
PTW Paging Time Window
RAT Radio Access Technology
RNA RAN-based Notification Area
RNAU RAN-based Notification Area Update
RRC Radio Resource Control
SDT Small Data Transmission
SNPN Stand-alone Non-Public Network
TRS Tracking Reference Signal
U2N UE-to-Network
UAC Unified Access Control
UE User Equipment
UMTS Universal Mobile Telecommunications System
V2X Vehicle to Everything