ETSI TS 123 122 V19.6.0 (2026-03)

Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; 5G; Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode (3GPP TS 23.122 version 19.6.0 Release 19)

RTS/TSGC-0123122vj60

General Information

• Status: Not Published
• Technical Committee: 3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
• Current Stage: 8 - Draft receipt by ETSI Secretariat
• Completion Date: 10-Mar-2026

Standards Content (Sample)

TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS);
LTE;
5G;
Non-Access-Stratum (NAS)
functions related to Mobile Station (MS) in idle mode
(3GPP TS 23.122 version 19.6.0 Release 19)

3GPP TS 23.122 version 19.6.0 Release 19 1 ETSI TS 123 122 V19.6.0 (2026-03)

Reference
RTS/TSGC-0123122vj60
Keywords
5G,GSM,LTE,UMTS
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All rights reserved.
ETSI
3GPP TS 23.122 version 19.6.0 Release 19 2 ETSI TS 123 122 V19.6.0 (2026-03)
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Legal Notice
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities. These shall be
interpreted as being references to the corresponding ETSI deliverables.
The cross reference between 3GPP and ETSI identities can be found at 3GPP to ETSI numbering cross-referencing.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
3GPP TS 23.122 version 19.6.0 Release 19 3 ETSI TS 123 122 V19.6.0 (2026-03)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 8
1.1 References . 8
1.2 Definitions and abbreviations . 11
2 General description of idle mode . 19
3 Requirements and technical solutions . 20
3.0 General . 20
3.1 PLMN selection and roaming . 20
3.1A CSG selection / restriction . 26
3.1B PLMN selection triggered by ProSe communications . 27
3.1C PLMN selection triggered by V2X communication over PC5 . 29
3.1D PLMN selection triggered by A2X communication over PC5 . 32
3.2 Regional provision of service . 34
3.3 Borders between registration areas . 35
3.4 Access control . 35
3.4.1 Access control . 35
3.4.2 Forbidden LA or TA for regional provision of service . 36
3.5 No suitable cell (limited service state) . 36
3.6 CTS fixed part selection (A/Gb mode only) . 38
3.7 NAS behaviour configuration. 38
3.8 CAG selection (N1 mode only) . 38
3.9 SNPN selection . 39
3.9A SNPN selection triggered by ProSe communications. 40
3.10 Minimization of service interruption . 42
3.10.1 General . 42
3.10.2 MINT for MS to obtain service in 5GS under disaster condition . 42
3.10.3 MINT for MS with 5G-only national roaming access to obtain service in EPS under disaster
condition . 46
3.11 Signal level enhanced network selection . 47
4 Overall process structure . 48
4.1 Process goal . 48
4.2 States description . 48
4.3 List of states . 49
4.3.1 List of states for the PLMN selection process . 49
4.3.1.1 List of states for automatic mode (figure 2a) . 49
4.3.1.2 List of states for manual mode (figure 2b) . 49
4.3.2 Void . 49
4.3.3 List of states for location registration (figure 3) . 49
4.4 PLMN selection process . 50
4.4.1 Introduction. 50
4.4.2 Registration on a PLMN . 51
4.4.3 PLMN selection . 51
4.4.3.0 General . 51
4.4.3.1 At switch-on or recovery from lack of coverage . 52
4.4.3.1.0 General . 52
4.4.3.1.1 Automatic Network Selection Mode Procedure . 54
4.4.3.1.2 Manual Network Selection Mode Procedure . 61
4.4.3.1.3 Manual CSG selection . 65
4.4.3.2 User reselection . 67
4.4.3.2.0 General . 67
4.4.3.2.1 Automatic Network Selection Mode . 67
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4.4.3.2.2 Manual Network Selection Mode . 68
4.4.3.2.3 Manual CSG selection . 68
4.4.3.3 In VPLMN . 68
4.4.3.3.1 Automatic and manual network selection modes . 68
4.4.3.3.2 Manual CSG selection . 72
4.4.3.4 Investigation Scan for higher prioritized PLMN . 72
4.4.3.5 Periodic attempts for signal level enhanced network selection . 73
4.4.4 Abnormal cases . 74
4.4.5 Roaming not allowed in this LA or TA . 74
4.4.6 Steering of roaming . 74
4.5 Location registration process . 75
4.5.1 General . 75
4.5.2 Initiation of Location Registration . 75
4.5.3 Periodic Location Registration . 77
4.5.4 IMSI attach/detach operation . 78
4.5.5 No Suitable Cells In Location Area . 78
4.6 Service indication (A/Gb mode only) . 78
4.7 Pageability of the mobile subscriber . 78
4.8 MM Restart Procedure . 79
4.9 SNPN selection process . 79
4.9.1 General . 79
4.9.2 Registration on an SNPN . 79
4.9.3 SNPN selection . 79
4.9.3.0 General . 79
4.9.3.1 At switch-on or recovery from lack of coverage . 87
4.9.3.1.0 General . 87
4.9.3.1.1 Automatic SNPN selection mode procedure . 88
4.9.3.1.2 Manual SNPN selection mode procedure . 90
4.9.3.1.3 Automatic SNPN selection mode procedure for onboarding services in SNPN. 93
4.9.3.1.4 Manual SNPN selection mode procedure for onboarding services in SNPN . 94
4.9.3.1.5 Void . 94
4.9.3.2 User reselection . 94
4.9.3.2.0 General . 94
4.9.3.2.1 Automatic SNPN selection mode . 94
4.9.3.2.2 Manual SNPN selection mode procedure . 95
4.9.3.3 Additional conditions for SNPN selection for MS supports access to an SNPN providing access
for localized services in SNPN . 96
4.9.4 Abnormal cases . 96
5 Tables and Figures . 98
6 MS supporting access technologies defined both by 3GPP and 3GPP2 . 104
6.1 General . 104
Annex A (normative): HPLMN Matching Criteria . 106
Annex B (normative): PLMN matching criteria to be of same country as VPLMN . 110
Annex C (normative): Control plane solution for steering of roaming in 5GS . 111
C.0 Requirements for 5G steering of roaming over the control plane . 111
C.1 General . 111
C.1.1 Steering of roaming over the control plane in a PLMN . 111
C.1.2 Steering of roaming over the control plane in an SNPN . 113
C.2 Stage-2 flow for steering of UE in VPLMN during registration . 116
C.3 Stage-2 flow for steering of UE in HPLMN or VPLMN after registration . 124
C.4 Enhanced 5G control plane steering of roaming for the UE in connected mode . 129
C.4.1 General . 129
C.4.2 Applying SOR-CMCI in the UE . 132
C.4.3 Stage-2 flow for providing UE with SOR-CMCI in HPLMN, VPLMN, subscribed SNPN or non-
subscribed SNPN after registration . 135
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C.5 Stage-2 flow for steering of UE in SNPN during registration . 138
C.6 Stage-2 flow for steering of UE in SNPN after registration . 144
C.7 Stage-2 flow for providing UE with SOR-SNPN-SI or SOR-SNPN-SI-LS in HPLMN or VPLMN
after registration . 148
C.8 Stage-2 flow for providing UE with list of preferred PLMN/access technology combinations in
SNPN after registration . 151
Annex D (informative): Change history . 155
History . 173

ETSI
3GPP TS 23.122 version 19.6.0 Release 19 6 ETSI TS 123 122 V19.6.0 (2026-03)
Foreword
This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
In the present document, modal verbs have the following meanings:
shall indicates a mandatory requirement to do something
shall not indicates an interdiction (prohibition) to do something
The constructions "shall" and "shall not" are confined to the context of normative provisions, and do not appear in
Technical Reports.
The constructions "must" and "must not" are not used as substitutes for "shall" and "shall not". Their use is avoided
insofar as possible, and they are not used in a normative context except in a direct citation from an external, referenced,
non-3GPP document, or so as to maintain continuity of style when extending or modifying the provisions of such a
referenced document.
should indicates a recommendation to do something
should not indicates a recommendation not to do something
may indicates permission to do something
need not indicates permission not to do something
The construction "may not" is ambiguous and is not used in normative elements. The unambiguous constructions
"might not" or "shall not" are used instead, depending upon the meaning intended.
can indicates that something is possible
cannot indicates that something is impossible
The constructions "can" and "cannot" are not substitutes for "may" and "need not".
will indicates that something is certain or expected to happen as a result of action taken by an agency
the behaviour of which is outside the scope of the present document
will not indicates that something is certain or expected not to happen as a result of action taken by an
agency the behaviour of which is outside the scope of the present document
might indicates a likelihood that something will happen as a result of action taken by some agency the
behaviour of which is outside the scope of the present document
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3GPP TS 23.122 version 19.6.0 Release 19 7 ETSI TS 123 122 V19.6.0 (2026-03)
might not indicates a likelihood that something will not happen as a result of action taken by some agency
the behaviour of which is outside the scope of the present document
In addition:
is (or any other verb in the indicative mood) indicates a statement of fact
is not (or any other negative verb in the indicative mood) indicates a statement of fact
The constructions "is" and "is not" do not indicate requirements.

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3GPP TS 23.122 version 19.6.0 Release 19 8 ETSI TS 123 122 V19.6.0 (2026-03)
1 Scope
The present document gives an overview of the tasks undertaken by the Core network protocols of a Mobile Station
(MS) when in idle mode, that is, switched on but typically not having a dedicated channel allocated. It also describes the
corresponding network functions. The idle mode functions are also performed by a GPRS MS as long as no dedicated
channel is allocated to the MS. The conditions when the idle mode functions are performed by an MS in the UTRA
RRC connected mode states are specified in 3GPP TS 25.331 [33]. The conditions when the idle mode functions are
performed by an MS in the E-UTRAN are specified in 3GPP TS 36.304 [43]. The conditions when the idle mode
functions are performed by an MS in the NG-RAN are specified in 3GPP TS 36.304 [43] and 3GPP TS 38.304 [61].
The conditions when the idle mode functions are performed by an MS in the NG-RAN RRC inactive state are specified
in 3GPP TS 36.331 [42] and 3GPP TS 38.331 [65].
The present document defines the PLMN selection for a multi mode MS that supports both 3GPP and 3GPP2 systems.
The common PLMN selection logic covers also PLMNs that are available in 3GPP2 system, but the present document ®
makes no changes on the cdma2000 signalling towards networks that are available via 3GPP2 system.
The present document gives procedures for using the CSG cells, whenever such use is permitted.
The present document gives procedures for using the CAG cells, when the MS supports CAG.
The present document specifies the SNPN selection.
This 3GPP TS outlines how the requirements of the 22 series Technical Specifications (especially 3GPP TS 22.011 [9])
on idle mode operation shall be implemented. Further details are given in 3GPP TS 24.008 [23].
Clause 2 of this 3GPP TS gives a general description of the idle mode process. Clause 3 outlines the main requirements
and technical solutions of those requirements. Clause 4 describes the processes used in idle mode. There is inevitably
some overlap between these clauses. ®
NOTE: cdma2000 is a registered trademark of the Telecommunications Industry Association (TIA-USA).
The present document describes the procedures for control plane solution of steering of roaming in 5GS in annex C.
Annex C is applicable to the MS, the AMF, the UDM and the SOR-AF in the 5GS.
The present document does not consider GERAN Iu mode.
1.1 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] Void.
[2] Void.
[3] Void.
[4] Void.
[5] Void.
[6] Void.
[7] Void
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3GPP TS 23.122 version 19.6.0 Release 19 9 ETSI TS 123 122 V19.6.0 (2026-03)
[8] Void.
[9] 3GPP TS 22.011: "Service accessibility".
[10] Void.
[11] Void.
[12] Void.
[13] Void.
[14] Void.
[15] Void.
[16] Void.
[17] Void.
[18] Void.
[19] Void.
[20] Void.
[21] Void.
[22] Void.
[22A] 3GPP TS 23.003: "Numbering, addressing and identification".
[23] 3GPP TS 24.008: "Mobile Radio Interface Layer 3 specification, Core Network Protocols -
Stage 3".
[23A] 3GPP TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS);
Stage 3".
[24] 3GPP TS 45.002: "Multiplexing and multiple access on the radio path".
[25] 3GPP TS 45.008: "Radio subsystem link control".
[26] Void.
[27] 3GPP TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage 2".
[27A] 3GPP TS 23.682: "Architecture enhancements to facilitate communications with packet data
networks and applications".
[28] Void.
[29] Void.
[30] Void.
[31] Void.
[32] 3GPP TS 25.304: "UE Procedures in Idle Mode and Procedures for Cell Reselection in Connected
Mode".
[33] 3GPP TS 25.331: "RRC Protocol Specification".
[34] 3GPP TS 44.018:"Mobile radio interface layer 3 specification, Radio Resource Control Protocol".
[35] 3GPP TS 43.022: "Functions related to Mobile Station (MS) in idle mode and group receive
mode".
[35A] 3GPP TS 43.318: "Generic Access Network (GAN); Stage 2".
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3GPP TS 23.122 version 19.6.0 Release 19 10 ETSI TS 123 122 V19.6.0 (2026-03)
[35B] 3GPP TS 44.318: "Generic Access Network (GAN); Mobile GAN interface layer 3 specification;
Stage 3".
[36] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[37] Void.
[38] 3GPP TS 21.111: "USIM and IC card requirements".
[39] 3GPP TS 44.060: "General Packet Radio Service (GPRS);Mobile Station (MS) - Base Station
System (BSS) interface; Radio Link Control/Medium Access Control (RLC/MAC) protocol".
[40] 3GPP TS 31.102: "Characteristics of the USIM Application".
[41] 3GPP TS 31.111: "Universal Subscriber Identity Module (USIM), Application Toolkit (USAT)".
[42] 3GPP TS 36.331: "Evolved Universal Terrestrial Radio Access (E-UTRA) Radio Resource
Control (RRC); Protocol specification".
[43] 3GPP TS 36.304: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE)
procedures in idle mode".
[44] 3GPP2 C.S0016-D v1.0: "Over-the-Air Service Provisioning of Mobile Stations in Spread
Spectrum Standards".
[45] 3GPP2 C.S0011-C v2.0: "Recommended Minimum Performance Standards for cdma2000 Spread
Spectrum Mobile Stations".
[46] 3GPP2 C.S0033-A v2.0: "Recommended Minimum Performance Standards for cdma2000 High
Rate Packet Data Access Terminal".
[47] 3GPP TS 24.285: "Allowed Closed Subscriber Group (CSG) List Management Object (MO)".
[48] Void.
[49] 3GPP TS 22.220: "Service requirements for Home Node B (HNB) and Home eNode B (HeNB)".
[50] 3GPP TS 24.368: "Non-Access Stratum (NAS) configuration Management Object (MO)".
[51] 3GPP TS 24.334: "Proximity-services (ProSe) User Equipment (UE) to Proximity-services
(ProSe) Function Protocol aspects; Stage 3".
[52] 3GPP TS 24.333: "Proximity-services (ProSe) Management Objects (MO)".
[53] 3GPP TS 24.105: "Application specific Congestion control for Data Communication (ACDC)
Management Object (MO)".
[54] 3GPP TS 36.306: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE)
radio access capabilities".
[55] 3GPP TS 43.064: "Overall description of the GPRS Radio Interface; Stage 2".
[56] 3GPP TS 36.300: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal
Terrestrial Radio Access Network (E-UTRAN); Overall description".
[57] 3GPP TS 23.167: "IP Multimedia Subsystem (IMS) emergency sessions".
[58] 3GPP TS 23.401: "GPRS enhancements for E-UTRAN access".
[59] 3GPP TS 24.386: "User Equipment (UE) to V2X control function; protocol aspects; Stage 3".
[60] 3GPP TS 24.385: "V2X services Management Object (MO)".
[61] 3GPP TS 38.304: "NR; User Equipment (UE) procedures in Idle mode and RRC Inactive state".
[62] 3GPP TS 23.501: "System Architecture for the 5G System; Stage 2".
[63] 3GPP TS 23.502: "Procedures for the 5G System; Stage 2".
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[64] 3GPP TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
[65] 3GPP TS 38.331: "NR; Radio Resource Control (RRC) protocol specification".
[66] 3GPP TS 33.501: "Security architecture and procedures for 5G System".
[67] 3GPP TS 31.115: "Secured packet structure for (Universal) Subscriber Identity Module (U)SIM
Toolkit applications".
[68] 3GPP TS 23.246: "Multimedia Broadcast/Multicast Service (MBMS); Architecture and Functional
Description".
[69] 3GPP TS 23.221: "Architectural requirements".
[70] 3GPP TS 23.273: "5G System (5GS) Location Services (LCS)".
[71] 3GPP TS 29.544: "5G System (5GS); Secured Packet Application Function (SP-AF) services;
Stage 3".
[72] 3GPP TS 29.571: "5G System (5GS); Common Data Types for Service Based Interfaces; Stage 3".
[73] ETSI TS 102 225: "Smart Cards; Secured packet structure for UICC based applications".
[74] 3GPP TS 22.261: "Service requirements for the 5G system; Stage 1".
[75] 3GPP TS 24.587: "Vehicle-to-Everything (V2X) services in 5G System (5GS); Stage 3".
[76] ITU-T Recommendation E.212: "The international identification plan for public networks and
subscriptions".
[77] 3GPP TS 24.526: "UE policies for 5G System (5GS); Stage 3".
[78] 3GPP TS 29.503: "5G System; Unified Data Management Services; Stage 3".
[79] 3GPP TS 24.588: "Vehicle-to-Everything (V2X) services in 5G System (5GS); User Equipment
(UE) policies; Stage 3".
[80] 3GPP TS 24.554: " Proximity-services (ProSe) in 5G System (5GS) protocol aspects; Stage 3".
[81] 3GPP TS 24.555: "Proximity-services (ProSe) in 5G System (5GS); User Equipment (UE)
policies; Stage 3".
[82] 3GPP TS 29.504: "5G System; Unified Data Repository Services; Stage 3".
[83] 3GPP TS 29.505: "5G System; Usage of the Unified Data Repository services for Subscription
Data; Stage 3".
[84] 3GPP TS 24.229: "IP multimedia call control protocol based on Session Initiation Protocol (SIP)
and Session Description Protocol (SDP); Stage 3".
[85] 3GPP TS 23.247: "Architectural enhancements for 5G multicast-broadcast services; Stage 2".
[86] 3GPP TS 24.577: "Aircraft-to-Everything (A2X) services in 5G System (5GS) protocol aspects;
Stage 3".
[87] 3GPP TS 24.578: "Aircraft-to-Everything (A2X) services in 5G System (5GS); UE policies;
Stage 3".
[88] 3GPP TS 29.550: "5G System; Steering of roaming application function services; Stage 3".
[89] 3GPP TS 38.306: "NR; User Equipment (UE) radio access capabilities".
1.2 Definitions and abbreviations
For the purposes of the present document, the abbreviations defined in 3GPP TR 21.905 [36] apply.
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(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.
NOTE 1: In accordance with the description of packet services in Iu mode in 3GPPS TS 24.008 [23], the terms
'CS/PS mode of operation' and 'PS mode of operation' are not used in the present document. Instead the
terms 'MS operation mode A' and 'MS operation mode C' are used.
(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 3GPP TS 43.022 [35], for Iu mode in 3GPP TS 25.304 [32], for S1 mode in
3GPP TS 36.304 [43], and for NR access in N1 mode in 3GPP TS 38.304 [61] and for E-UTRA access in N1 mode in
3GPP TS 36.304 [43]. For an MS in eCall only mode, an acceptable cell must further satisfy the criteria defined in
clause 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. The
following access technologies are defined: GSM, UTRAN, GSM COMPACT, EC-GSM-IoT, cdma2000 1xRTT,
cdma2000 HRPD, E-UTRAN (WB-S1 mode and NB-S1 mode), NG-RAN, satellite NG-RAN and satellite E-UTRAN
(WB-S1 mode and NB-S1 mode). A PLMN may support more than one access technology. SNPNs only support NG-
RAN.
NOTE 2: Access technology "E-UTRAN" maps to core network type "EPC" and access technology "NG-RAN"
maps to core network type "5GCN", see 3GPP TS 24.501 [64].
ACDC: Application specific Congestion control for Data Communication, see 3GPP TS 22.011 [9].
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 operation mode over 3GPP access and for an SNPN
candidate which is not an SNPN selected for localized services in SNPN, this is an SNPN which is not in the list of
"permanently forbidden SNPNs" which is, if the MS supports access to an SNPN using credentials from a credentials
holder, equivalent SNPNs or both, associated with the selected entry of the "list of subscriber data" or the selected
PLMN subscription, and is not in the list of "temporarily forbidden SNPNs" which is, if the MS supports access to an
SNPN using credentials from a credentials holder, equivalent SNPNs or both, associated with the selected entry of the
"list of subscriber data" or the selected PLMN subscription. In the case of an MS operating in SNPN access operation
mode over 3GPP access and for an SNPN candidate which is an SNPN selected for localized services in SNPN, this is
an SNPN which is not in the list of "permanently forbidden SNPNs for access for localized services in SNPN" which is
associated with the selected entry of the "list of subscriber data" or the selected PLMN subscription, and is not in the list
of "temporarily forbidden SNPNs for access for localized services in SNPN" which is associated with the selected entry
of the "list of subscriber data" or the selected PLMN subscription. For onboarding services in SNPN, this is an SNPN
which is not in the list of "permanently forbidden SNPNs for onboarding services in SNPN" and is not in the list of
"temporarily forbidden SNPNs for onboarding services in SNPN".
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, satellite E-UTRAN, satellite NG-RAN (see 3GPP TS 22.261 [74]) and NG-RAN are
access technologies that are only supporting GPRS services.
Available PLMN: For GERAN A/Gb mode see 3GPP TS 43.022 [35]. For UTRAN see 3GPP TS 25.304 [32]. For E-
UTRAN see 3GPP TS 36.304 [43]. For satellite E-UTRAN see 3GPP TS 36.304 [43]. For NG-RAN see
ETSI
3GPP TS 23.122 version 19.6.0 Release 19 13 ETSI TS 123 122 V19.6.0 (2026-03) ®
3GPP TS 36.304 [43] and 3GPP TS 38.304 [61]. For satellite NG-RAN, see 3GPP TS 38.304 [61]. For cdma2000 ®
1xRTT and cdma2000 HRPD see 3GPP2 C.S0016 [44].
Available SNPN: For NG-RAN see 3GPP TS 38.304 [61].
Available PLMN/access technology combination: This is an available PLMN in a specific access technology.
CAG-ID authorized based on "Allowed CAG list": A CAG-ID in an "Allowed CAG list", without a time validity
information, or with a time validity information with at least one time period matching UE's current time.
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 defined in ITU-T recommendation E.212 [76], with the
exception of the following MCC ranges that identify a single country:
- values 310 through 316 (USA);
- values 404 through 406 (India);
- values 440 through 441 (Japan);
- values 460 through 461 (China); and
- values 234 through 235 (United Kingdom).
Permitted CSG list: See 3GPP TS 36.304 [43].
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.
Discontinuous coverage: Deployment option for satellite E-UTRAN access, in which shorter periods of satellite E-
UTRAN access radio coverage are followed by longer periods of satellite E-UTRAN access coverage gaps. During
coverage gaps, the access stratum may be deactivated. For more details see 3GPP TS 23.401 [58]
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