ETSI TS 123 273 V16.6.0 (2021-04)

5G; 5G System (5GS) Location Services (LCS); Stage 2 (3GPP TS 23.273 version 16.6.0 Release 16)

RTS/TSGS-0223273vg60

General Information

• Status: Not Published
• Technical Committee: 3GPP SA 2 - Architecture
• Current Stage: 12 - Completion
• Completion Date: 15-Apr-2021

Standards Content (Sample)

ETSI TS 123 273 V16.6.0 (2021-04)






TECHNICAL SPECIFICATION
5G;
5G System (5GS) Location Services (LCS);
Stage 2
(3GPP TS 23.273 version 16.6.0 Release 16)

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3GPP TS 23.273 version 16.6.0 Release 16 1 ETSI TS 123 273 V16.6.0 (2021-04)

Reference
RTS/TSGS-0223273vg60
Keywords
5G

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3GPP TS 23.273 version 16.6.0 Release 16 2 ETSI TS 123 273 V16.6.0 (2021-04)
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3GPP TS 23.273 version 16.6.0 Release 16 3 ETSI TS 123 273 V16.6.0 (2021-04)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 7
2 References . 7
3 Definitions and Abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 9
4 Architecture Model and Concepts . 9
4.1 General Concepts . 9
4.1a Types of Location Request . 10
4.1a.1 Network Induced Location Request (NI-LR) . 10
4.1a.2 Mobile Terminated Location Request (MT-LR). 10
4.1a.3 Mobile Originated Location Request (MO-LR) . 10
4.1a.4 Immediate Location Request . 10
4.1a.5 Deferred Location Request . 10
4.1a.5.1 Types of event . 10
4.1b LCS Quality of Service . 11
4.2 Architectural Reference Model . 12
4.2.1 Non-roaming reference architecture . 12
4.2.2 Roaming reference architecture . 13
4.2a Interconnection between 5GC and EPC . 14
4.2a.1 General . 14
4.2a.2 Non-roaming architecture . 14
4.2a.3 Roaming architecture . 15
4.2b Positioning methods . 17
4.3 Functional description of LCS per network function . 17
4.3.1 Access Network . 17
4.3.2 LCS Clients, Application Functions and Network Functions . 18
4.3.3 Gateway Mobile Location Centre, GMLC . 18
4.3.4 Location Retrieval Function, LRF . 19
4.3.5 UE . 19
4.3.6 UDM . 20
4.3.7 Access and Mobility Management Function, AMF . 20
4.3.8 Location Management Function, LMF . 20
4.3.9 Network Exposure Function, NEF . 21
4.3.10 Unified Data Repository, UDR . 21
4.4 Reference Point to Support Location Services . 21
4.4.1 Le Reference Point. 21
4.4.2 NL3 Reference Point . 21
4.4.3 N1 Reference Point . 21
4.4.4 N2 Reference Point . 22
4.4.5 Void . 22
4.4.6 NL5 Reference Point . 22
4.4.7 NL2 Reference Point . 22
4.4.8 NL6 Reference Point . 22
4.4.9 N51 Reference Point . 22
4.4.10 NL1 Reference Point . 22
4.4.11 N52 Reference Point . 22
4.4.12 NL7 Reference Point . 22
4.5 Service Based Interfaces to Support Location Services . 22
5 High Level Features . 23
ETSI

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3GPP TS 23.273 version 16.6.0 Release 16 4 ETSI TS 123 273 V16.6.0 (2021-04)
5.1 LMF Selection . 23
5.1a GMLC Discovery and Selection . 24
5.2 3GPP access specific aspects. 24
5.3 Non-3GPP Access Specific Aspects . 24
5.3.1 Location Information for Non-3GPP Access . 24
5.3.2 Access Type Selection for LCS Service . 25
5.4 UE LCS privacy . 26
5.4.1 General . 26
5.4.2 Content of UE LCS Privacy Profile . 26
5.4.2.1 General . 26
5.4.2.2 Privacy Classes . 27
5.4.2.2.1 Universal Class . 27
5.4.2.2.2 Call/Session related Class . 27
5.4.2.2.3 Call/Session unrelated Class . 27
5.4.2.2.4 PLMN Operator Class . 27
5.4.2.3 Location Privacy Indication (LPI) . 28
5.4.3 Provision of UE LCS privacy profile . 28
5.4.4 Privacy Override Indicator (POI) . 28
5.4.5 LCS service authorization for an Immediate UE Location . 28
5.4.6 LCS service authorization for a Deferred UE Location . 29
5.5 Location service exposure . 30
5.6 LCS Charging . 32
5.7 Support of Concurrent Location Requests . 32
5.7.1 General . 32
5.7.2 Combining location requests by an H-GMLC or NEF . 33
5.7.3 Combining location requests by a V-GMLC . 33
5.7.4 Combining location requests by an AMF . 33
5.7.5 Combining location requests by an LMF . 33
5.7.6 Combining location requests by a UE. 33
5.8 Interworking with the IMS . 33
6 Location Service Procedures . 34
6.1 5GC-MT-LR Procedure . 34
6.1.1 5GC-MT-LR procedure for the regulatory location service . 34
6.1.2 5GC-MT-LR Procedure for the commercial location service . 35
6.2 5GC-MO-LR Procedure . 39
6.3 Deferred 5GC-MT-LR Procedure for Periodic, Triggered and UE Available Location Events . 42
6.3.1 Initiation and Reporting of Location Events . 42
6.3.2 Cancellation of Reporting of Location Events by a UE . 48
6.3.3 Cancellation of Reporting of Location Events by an AF or External LCS Client or GMLC . 49
6.4 LMF Change Procedure . 50
6.5 Unified Location Service Exposure Procedure . 52
6.5.1 Unified Location Service Exposure Procedure without routing by a UDM . 52
6.5.2 Unified Location Service Exposure Procedure with routing via a UDM . 54
6.6 NG-RAN Location Service Exposure Procedure . 55
6.7 Low Power Periodic and Triggered 5GC-MT-LR Procedures . 55
6.7.1 Event Reporting with no change of LMF . 56
6.7.2 Event Reporting with change of LMF . 58
6.8 Bulk Operation of LCS Service Request Targeting to Multiple UEs . 58
6.9 Procedures to Support Non-3GPP Access . 61
6.9.1 Common Positioning Procedures when a UE is served by only one PLMN . 61
6.9.2 MT-LR Procedures when a UE is served by Different PLMNs for 3GPP Access and Non-3GPP
Access . 63
6.9.3 MO-LR Procedures when UE is served by the Different PLMNs via 3GPP Access and Non-3GPP
Access . 66
6.9.4 NI-LR Procedures when a UE is served by Different PLMNs for 3GPP access and non-3GPP access . 66
6.10 Procedures dedicated to Support Regulatory services . 66
6.10.1 5GC-NI-LR Procedure . 66
6.10.2 5GC-MT-LR Procedure without UDM Query . 68
6.10.3 Location continuity for Handover of an Emergency session from NG-RAN . 69
6.11 Common Sub-Procedures . 70
6.11.1 UE Assisted and UE Based Positioning Procedure . 70
ETSI

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3GPP TS 23.273 version 16.6.0 Release 16 5 ETSI TS 123 273 V16.6.0 (2021-04)
6.11.2 Network Assisted Positioning Procedure . 72
6.11.3 Obtaining Non-UE Associated Network Assistance Data . 72
6.12 UE Location Privacy Setting Procedure . 74
6.12.1 UE Location Privacy Setting Procedure Initiated by UE . 74
6.12.2 UE Location Privacy Setting Procedure Initiated by AF . 74
6.13 Procedures with interaction between 5GC and EPC . 75
6.13.1 MT-LR Procedure . 75
6.13.2 MO-LR Transfer to a Third Party Procedure . 76
6.14 Procedures for Broadcast of Assistance Data . 77
6.14.1 Broadcast of Assistance Data by an LMF . 77
6.14.2 Delivery of Ciphering Keys to UEs for Broadcast Assistance Data . 78
7 Information storage . 80
7.1 UDM . 80
7.2 GMLC . 82
7.2.1 Information for an LCS Client . 82
8 Network Function Services . 84
8.1 AMF Services . 84
8.2 UDM Services . 84
8.3 LMF Services . 84
8.3.1 General . 84
8.3.2 Nlmf_Location service . 84
8.3.2.1 General . 84
8.3.2.2 Nlmf_Location_DetermineLocation service operation . 84
8.3.2.3 Nlmf_Location_EventNotify service operation . 85
8.3.2.4 Nlmf_Location_CancelLocation service operation . 85
8.3.2.5 Nlmf_Location_LocationContextTransfer service operation . 85
8.3.3 Nlmf_Broadcast service . 86
8.3.3.1 General . 86
8.3.3.2 Nlmf_Broadcast_CipheringKeyData service operation . 86
8.4 GMLC Services . 86
8.4.1 General . 86
8.4.2 Ngmlc_Location service . 86
8.4.2.1 General . 86
8.4.2.2 Ngmlc_Location_ProvideLocation service operation . 87
8.4.2.3 Ngmlc_Location_LocationUpdate service operation . 87
8.4.2.4 Ngmlc_Location_EventNotify service operation . 88
8.4.2.5 Ngmlc_Location_CancelLocation service operation . 88
8.4.2.6 Ngmlc_Location_LocationUpdateNotify service operation . 88
8.5 NEF Services . 88
...