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Content for  TS 23.122  Word version:  16.6.1

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1.2  Definitions and abbreviationsWord‑p. 9
For the purposes of the present document, the abbreviations defined in TR 21.905 apply.
(A/Gb mode only):
Indicates this clause applies only to a GSM system which operates in A/Gb mode. For multi system case this is determined by the current serving radio access network.
(Iu mode only):
Indicates this clause applies only to UMTS. For multi system case this is determined by the current serving radio access network.
(S1 mode only):
Indicates this clause applies only to an EPS. For multi system case this is determined by the current serving radio access network.
Acceptable Cell:
This is a cell that the MS may camp on to make emergency calls or to access RLOS. It must satisfy criteria which are defined for A/Gb mode in TS 43.022, for Iu mode in TS 25.304, for S1 mode in TS 36.304, and for NR access in N1 mode in TS 38.304 and for E-UTRA access in N1 mode in TS 36.304. For an MS in eCall only mode, an acceptable cell must further satisfy the criteria defined in subclause 4.4.3.1.1.
Access Technology:
The access technology associated with a PLMN or SNPN. The MS uses this information to determine what type(s) of radio carrier to search for when attempting to select a specific PLMN or SNPN (e.g., GSM, UTRAN, GSM COMPACT, E-UTRAN or NG-RAN). A PLMN may support more than one access technology. SNPNs only support NG-RAN.
ACDC:
Application specific Congestion control for Data Communication, see TS 22.011.
Allowable PLMN:
In the case of an MS operating in MS operation mode A or B, this is a PLMN which is not in the list of "forbidden PLMNs" in the MS. In the case of an MS operating in MS operation mode C or an MS not supporting A/Gb mode and not supporting Iu mode, this is a PLMN which is not in the list of "forbidden PLMNs" and not in the list of "forbidden PLMNs for GPRS service" in the MS.
Allowable SNPN:
In the case of an MS operating in SNPN access mode, this is an SNPN which is not in the list of "permanently forbidden SNPNs" and is not in the list of "temporarily forbidden SNPNs".
Allowable PLMN/access technology combination:
For an MS operating in MS operation mode C or an MS not supporting A/Gb mode and not supporting Iu mode, this is an allowable PLMN in any specific access technology. For an MS operating in MS operation mode A or B, this is a PLMN/access technology combination where:
  • the PLMN is an allowable PLMN and the specific access technology is supporting non-GPRS services; or
  • the PLMN is not in the list of "forbidden PLMNs" and not in the list of "forbidden PLMNs for GPRS service" in the MS and the specific access technology is only supporting GPRS services.
EXAMPLE: E-UTRAN and NG-RAN are access technologies that are only supporting GPRS services.
Available PLMN:
For GERAN A/Gb mode see TS 43.022. For UTRAN see TS 25.304. For E-UTRAN see TS 36.304. For NG-RAN see TS 36.304 and TS 38.304. For cdma2000® 1xRTT and cdma2000® HRPD see 3GPP2 C.S0016 [44].
Available SNPN:
For NG-RAN see TS 38.304.
Available PLMN/access technology combination:
This is an available PLMN in a specific access technology.
Camped on a cell:
The MS (ME if there is no SIM) has completed the cell selection/reselection process and has chosen a cell from which it plans to receive all available services. Note that the services may be limited, and that the PLMN or the SNPN may not be aware of the existence of the MS (ME) within the chosen cell.
Country:
A country is identified by a single MCC value, with the exception that MCC values 310 through 316 identify a single country (USA) and MCC values 404 through 406 identify a single country (India).
CSG whitelist:
See TS 36.304.
Current serving cell:
This is the cell on which the MS is camped.
CTS MS:
An MS capable of CTS services is a CTS MS.
EAB:
Extended Access Barring, see TS 22.011.
Extended Coverage in GSM for Internet of Things (EC-GSM-IoT):
Extended coverage in GSM for IoT is a feature which enables extended coverage operation. See TS 43.064.
EHPLMN:
Any of the PLMN entries contained in the Equivalent HPLMN list.
Equivalent HPLMN list:
To allow provision for multiple HPLMN codes, PLMN codes that are present within this list shall replace the HPLMN code derived from the IMSI for PLMN selection purposes. This list is stored on the USIM and is known as the EHPLMN list. The EHPLMN list may also contain the HPLMN code derived from the IMSI. If the HPLMN code derived from the IMSI is not present in the EHPLMN list then it shall be treated as a Visited PLMN for PLMN selection purposes.
Generic Access Network (GAN):
See TS 43.318.
GAN mode:
See TS 43.318.
GPRS MS:
An MS capable of GPRS services is a GPRS MS.
MS operation mode:
See TS 23.060.
High quality signal:
The high quality signal limit is used in the PLMN selection procedure. It is defined in the appropriate AS specification: TS 43.022 for the GSM radio access technology, TS 25.304 for the UMTS radio access technology (FDD or TDD mode), TS 36.304 for the E-UTRAN radio access technology (WB-S1 mode, NB-S1 mode, WB-N1 mode or NB-N1 mode), TS 36.304 and and TS 38.304 for the NG-RAN radio access technology. For 3GPP2 access technologies the high quality signal limit is defined in 3GPP2 C.S0011 [45] for cdma2000® 1xRTT and in 3GPP2 C.S0033 [46] for cdma2000® HRPD. A mobile station attempting to find a cell that supports EC-GSM-IoT (see TS 43.064) does not use high quality signal limit in the PLMN selection procedure, i.e. for the purpose of PLMN selection, when attempting to find a cell that supports EC-GSM-IoT, any found cell supporting EC-GSM-IoT is considered to be received with high quality signal. A UE attempting to find a cell that supports enhanced coverage when operating in any WB-S1 or WB-N1 enhanced coverage mode does not use high quality signal limit in the PLMN selection procedure, i.e. for the purpose of PLMN selection, when attempting to find a cell that supports enhanced coverage, any found cell supporting enhanced coverage and satisfying the coverage specific quality signal limit defined for CE mode (see TS 36.304) is considered to be received with high quality signal.
Home PLMN:
This is a PLMN where the MCC and MNC of the PLMN identity match the MCC and MNC of the IMSI. Matching criteria are defined in Annex A.
In A/Gb mode,...:
Indicates this clause applies only to a GSM system which operates in A/Gb mode. For multi system case this is determined by the current serving radio access network.
In Iu mode,...:
Indicates this clause applies only to UMTS. For multi system case this is determined by the current serving radio access network.
In N1 mode,...:
Indicates this clause applies only to an 5GS. For multi system case this is determined by the current serving radio access network.
In NB-N1 mode:
Indicates this paragraph applies only to a system which operates in NB-N1 mode. For a multi-access system this case applies if the current serving radio access network provides access to 5G network services via E-UTRA connected to 5GCN by NB-IoT (see TS 36.300, TS 36.331, TS 36.306).
In WB-N1 mode:
Indicates this paragraph applies only to a system which operates in WB-N1 mode. For a multi-access system this case applies if the system operates in N1 mode with E-UTRA connected to 5GCN, but not in NB-N1 mode.
In S1 mode,...:
Indicates this clause applies only to an EPS. The S1 mode includes WB-S1 mode and NB-S1 mode. For multi system case this is determined by the current serving radio access network.
In NB-S1 mode:
Indicates this paragraph applies only to a system which operates in NB-S1 mode. For a multi-access system this case applies if the current serving radio access network provides access to network services via E-UTRA by NB-IoT (see TS 36.300, TS 36.331, TS 36.306).
In WB-S1 mode:
Indicates this paragraph applies only to a system which operates in WB-S1 mode. For a multi-access system this case applies if the system operates in S1 mode, but not in NB-S1 mode.
Limited Service State:
Localised Service Area (LSA):
A localised service area consists of a cell or a number of cells. The cells constituting a LSA may not necessarily provide contiguous coverage.
Location Registration (LR):
An MS which is IMSI attached to non-GPRS services only performs location registration by the Location Updating procedure. A GPRS MS which is IMSI attached to GPRS services or to GPRS and non-GPRS services performs location registration by the Routing Area Update procedure only when in a network of network operation mode I. Both location updating and routing area update procedures are performed independently by the GPRS MS when it is IMSI attached to GPRS and non-GPRS services in a network of network operation mode II (see TS 23.060). An MS which is attached via the E-UTRAN performs location registration by the tracking area update procedure. An MS which is registered via the NG-RAN performs location registration by the mobility registration update procedure.
MS:
Mobile Station. The present document makes no distinction between MS and UE.
N1 mode capability:
Capability of the UE associated with an N1 NAS signalling connection between the UE and network. The present document refers to the N1 mode capability over 3GPP access only (see TS 24.501).
NarrowBand Internet of Things (NB-IoT):
NB-IoT is a non-backward compatible variant of E-UTRAN supporting a reduced set of functionality. NB-IoT allows access to EPC or 5GCN network services via E-UTRA with a channel bandwidth limited to 180 kHz (see TS 36.300, TS 36.331, TS 36.306).
Network Type:
The network type associated with HPLMN or a PLMN on the PLMN selector (see TS 31.102). The MS uses this information to determine what type of radio carrier to search for when attempting to select a specific PLMN. A PLMN may support more than one network type.
Registered PLMN (RPLMN):
This is the PLMN on which certain LR outcomes have occurred (see table 1). In a shared network the RPLMN is the PLMN defined by the PLMN identity of the CN operator that has accepted the LR.
Registered SNPN (RSNPN):
This is the SNPN on which certain LR outcomes have occurred. In a shared network the RSNPN is the SNPN defined by the SNPN identity of the CN operator that has accepted the LR.
Registration:
This is the process of camping on a cell of the PLMN or the SNPN and doing any necessary LRs.
Registration Area:
A registration area is an area in which mobile stations may roam without a need to perform location registration. The registration area corresponds to location area (LA) for performing location updating procedure, to routing area for performing the GPRS attach or routing area update procedures, and to a list of tracking areas (TAs) for performing the EPS attach, tracking area update, or 5GS registration procedure.
The PLMN to which a cell belongs (PLMN identity):
  • for GERAN, in the system information (MCC + MNC part of LAI) broadcast as specified in TS 44.018;
  • for UTRA, see the broadcast information as specified in TS 25.331;
  • for E-UTRA, see the broadcast information as specified in TS 36.331; and
  • for NR, see the broadcast information as specified in TS 38.331.
The SNPN to which a cell belongs (SNPN identity):
  • for NR, see the broadcast information as specified in TS 38.331.
In a shared network, a cell belongs to all PLMNs given in the system information broadcasted as specified in TS 44.018 for GERAN, in TS 25.331 for UTRAN, and in TS 36.331 for E-UTRAN, and a cell belongs to all PLMNs, all SNPNs, or all PLMNs and all SNPNs, given in the system information broadcasted as specified in TS 36.331 for E-UTRA connected to 5GCN, and in TS 38.331 for NR.
Secured packet:
In this specification, a secured packet contains the list of preferred PLMN/access technology combinations encapsulated with a security mechanism as described in TS 31.115.
Selected PLMN:
This is the PLMN that has been selected according to subclause 3.1, either manually or automatically.
Selected SNPN:
This is the SNPN that has been selected according to subclause 3.9, either manually or automatically.
Shared Network:
An MS considers a cell to be part of a shared network, when multiple PLMN identities are received as specified in TS 44.018 for GERAN, in TS 25.331 for UTRAN, and in TS 36.331 for E-UTRAN, and when multiple PLMN identities, multiple SNPN identities or one or more PLMN identities and one or more SNPN identities are received as specified in TS 36.331 for E-UTRA connected to 5GCN, and in TS 38.331 for NR.
SIM:
Subscriber Identity Module (see TS 21.111). The present document makes no distinction between SIM and USIM.
SNPN identity:
a PLMN ID and an NID combination.
SoLSA exclusive access:
Cells on which normal camping is allowed only for MS with Localised Service Area (LSA) subscription.
Suitable Cell:
This is a cell on which an MS may camp. It must satisfy criteria which are defined for GERAN A/Gb mode in TS 43.022, for UTRAN in TS 25.304, for E-UTRAN in TS 36.304 and for NG-RAN see TS 36.304 and TS 38.304. For 3GPP2 access technologies the criteria are defined in 3GPP2 C.S0011 [45] for cdma2000® 1xRTT and in 3GPP2 C.S0033 [46] for cdma2000® HRPD. For an MS in eCall only mode, a suitable cell must further satisfy the criteria defined in subclause 4.4.3.1.1.
Steering of Roaming (SOR):
A technique whereby a roaming UE is encouraged to roam to a preferred roamed-to-network indicated by the HPLMN.
Steering of Roaming application function (SOR-AF):
An application function that can provide UDM with one of the following:
  1. list of preferred PLMN/access technology combinations;
  2. a secured packet; or
  3. neither of them,
generated dynamically based on operator specific data analytics solutions.
Steering of Roaming information:
This consists of the following HPLMN protected information (see TS 33.501):
  1. an indication of whether the UDM requests an acknowledgement from the UE for successful reception of the steering of roaming information; and
  2. one of the following:
    1. list of preferred PLMN/access technology combinations with an indication that it is included;
    2. a secured packet with an indication that it is included; or
    3. the HPLMN indication that 'no change of the "Operator Controlled PLMN Selector with Access Technology" list stored in the UE is needed and thus no list of preferred PLMN/access technology combinations is provided'.
Visited PLMN:
This is a PLMN different from the HPLMN (if the EHPLMN list is not present or is empty) or different from an EHPLMN (if the EHPLMN list is present).
For the purposes of the present document, the following terms and definitions given in TS 23.167 apply:
eCall over IMS
EPC
E-UTRAN
For the purposes of the present document, the following terms and definitions given in TS 23.401 apply:
eCall only mode
For the purposes of the present document, the following terms and definitions given in TS 23.221 apply:
Restricted local operator services (RLOS)
For the purposes of the present document, the following terms and definitions given in TS 23.501 apply:
Closed Access Group (CAG)
Network identifier (NID)
NG-RAN
Stand-alone Non-Public Network (SNPN)
SNPN access mode
For the purposes of the present document, the following terms and definitions given in TS 24.501 apply:
5GCN
Emergency PDU session
Initial registration for emergency services
Registered for emergency services
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