3 Definitions and abbreviations

25.3043GPPRelease 17TSUser Equipment (UE) procedures in idle mode and procedures for cell reselection in connected mode

3.1 Definitions

For the purposes of the present document, the following definitions and the definitions in [12] apply.

Absolute priority layer: A priority level can be defined for a UTRA frequency, a group of GSM frequencies or a E-UTRA frequency.

Acceptable Cell: A cell that satisfies certain conditions as specified in 4.3. A UE can always attempt emergency calls on an acceptable cell.

Available PLMN: A PLMN for which the UE has found at least one cell and read its PLMN identity.

Barred Cell: A cell a UE is not allowed to camp on.

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.

Camped on MBSFN cluster: UE has completed the MBSFN Cluster selection/reselection process and has chosen a MBSFN Cluster. The UE monitors system information and receives notifications for MBMS services and possibly receives a MBMS service.

Closed Subscriber Group (CSG): A Closed Subscriber Group identifies subscribers of an operator who are permitted to access one or more cells of the PLMN but which have restricted access (CSG cells).

CSG cell: A cell broadcasting a CSG Indicator that is set to TRUE and a specific CSG identity. All the UTRAN CSG cells sharing the same identity and PLMN identity are identifiable as a single group for the purposes of mobility management and charging.

CSG identity: An identifier broadcast by a CSG or hybrid cell/cells and used by the UE to facilitate access for authorised members of the associated Closed Subscriber Group.

CSG member cell: a cell broadcasting the identity of the selected PLMN, registered PLMN or equivalent PLMN and for which the Permitted CSG list of the UE includes an entry comprising cell’s CSG ID and the respective PLMN identity.

DRX cycle: Individual time interval between monitoring Paging Occasion for a specific UE.

EHPLMN: Any of the PLMN entries contained in the Equivalent HPLMN list stored on the USIM [5].

Equivalent PLMN list: List of PLMNs considered as equivalent by the UE for cell selection, cell reselection , MBSFN Cluster selection MBSFN Cluster reselection, and handover according to the information provided by the NAS.

HNB Name: The Home NodeB Name is a broadcast string in free text format that provides a human readable name for the Home NodeB CSG identity and any broadcasted PLMN identity.

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.

Hybrid cell: A cell not broadcasting a CSG Indicator but broadcasting a specific CSG identity.

Location Registration (LR): UE registers its presence in a registration area, for instance regularly or when entering a new registration area.

Maximum DRX cycle: Time interval for the longest possible DRX cycle in a cell.

MBMS Activated Service: An MBMS service that the UE has joined (multicast) or is interested in (broadcast).

MBMS Preferred Layer (PL): A frequency layer that is indicated by the UTRAN to be preferred for camping for MBMS purposes.

MBSFN cluster: Set of cells operating in MBSFN mode providing only MBMS service in PtM mode and seen as one cell by a UE.

MBSFN mode: In order to achieve higher spectral efficiency synchronized cells operate in MBSFN mode which implies that they transmit exactly the same content over an area that is seen as one MBSFN cell by the UE.

Paging Block Periodicity (PBP): Period of the occurrence of Paging Blocks. (For FDD, PBP = 1).

Paging Message Receiving Occasion (TDD only): The frame where the UE receives actual paging message.

Paging occasion:
(FDD) The SFN of the PICH frame where the UE monitors its paging indicator (i.e. the SFN of the PCCPCH frame in which the PICH frame begins).
(TDD) The paging block, which consists of several frames. The value of Paging Occasion is equal to the first frame of the Paging Block.

Permitted CSG list: A list provided by NAS containing all the CSG identities and their associated PLMN IDs of the CSGs to which the subscriber belongs.

NOTE: This list is known as Allowed CSG List in Rel-8 Access Stratum specifications.

Power saving mode: Mode allowing the UE to reduce its power consumption, as defined in TS 24.008 [16], TS 23.060 [21], TS 23.682 [22].

Process: A local action in the UE invoked by a RRC procedure or an Idle Mode procedure.

Radio Access Mode: Radio access mode of the cell, FDD or TDD.

Radio Access Technology: Type of technology used for radio access, for instance UTRA or GSM.

Registered PLMN: This is the PLMN on which certain Location Registration outcomes have occurred [5].

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.

Reserved Cell: A cell on which camping is not allowed, except for particular UEs, if so indicated in the system information.

Restricted Cell: A cell on which camping is allowed, but access attempts are disallowed for UEs whose access classes are indicated as barred.

Selected PLMN: This is the PLMN that has been selected by the NAS, either manually or automatically.

Serving cell: The cell on which the UE is camped.

Strongest cell: The cell on a particular carrier that is considered strongest according to the layer 1 cell search procedure [14][15]. As the details of the layer 1 cell search are implementation dependent, the precise definition of ‘strongest cell’ is also implementation dependent.

Suitable Cell: This is a cell on which an UE may camp. For a UTRA cell, the criteria are defined in subclause 4.3, for a GSM cell the criteria are defined in [1] and for a E-UTRA cell the criteria are defined in [18].

3.2 Abbreviations

For the purposes of the present document, the following abbreviations apply:

ACDC Application specific Congestion control for Data Communication

ANDSF Access Network Discovery and Selection Function

ANR Automatic Neighbor Relation

AS Access Stratum

BCCH Broadcast Control Channel

BSS Basic Service Set

CM Connection Management

CMAS Commercial Mobile Alert System

CN Core Network

CSG Closed Subscriber Group

DRX Discontinuous Reception

DSCH Downlink Shared Channel

E-UTRA Evolved UMTS Terrestrial Radio Access

E-UTRAN Evolved UMTS Terrestrial Radio Access Network

ETWS Earthquake and Tsunami Warning System

FDD Frequency Division Duplex

GC General Control (SAP)

GPRS General Packet Radio Service

GSM Global System for Mobile Communications

HCS Hierarchical Cell Structure

IMB Integrated Mobile Broadcast

IMSI International Mobile Subscriber Identity

MBMS Multimedia Broadcast-Multicast Service

MBSFN MBMS over a Single Frequency Network

MCC Mobile Country Code

MCCH MBMS point-to-multipoint Control Channel

MDT Minimization of Drive Tests

MICH MBMS notification Indicator Channel

MM Mobility Management

MNC Mobile Network Code

MSCH MBMS point-to-multipoint Scheduling Channel

MTCH MBMS point-to-multipoint Traffic Channel

NAS Non-Access Stratum

NI (MBMS) Notification Indicator

PCH Paging Channel

PI Page Indicator

PICH Page Indication Channel

PLMN Public Land Mobile Network

PSM Power Saving Mode

RAT Radio Access Technology

RRC Radio Resource Control

SAP Service Access Point

TDD Time Division Duplex

TMGI Temporary Mobile Group Identity

UE User Equipment

UMTS Universal Mobile Telecommunications System

UTRA UMTS Terrestrial Radio Access

UTRAN UMTS Terrestrial Radio Access Network