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TS 23.273SA2
5G System – Location Services

use "3GPP‑Page" to get the Word version
the full Contents is reproduced for this TS
V16.3.0 (Wzip)2020/03  94 p.

WI Acronym:  5G_eLCS
Rapporteur:  Mr. Ai, MingCATT (Chinese Academy of Telecommunications Technology)

The present document specifies the stage 2 of the service-based architecture used for location services in the 5G system, and corresponding Network Functions (NFs), NF services and procedures. The architecture and signalling procedures in NG-RAN are defined in TS 38.305.

essential Table of Contents for  TS 23.273  Word version:   16.3.0

each title links to the equivalent title in the full Contents
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1  ScopeWord-p. 7
2  ReferencesWord-p. 7
3  Definitions and AbbreviationsWord-p. 8
4  Architecture Model and ConceptsWord-p. 9
4.1  General ConceptsWord-p. 9
4.1a  Types of Location RequestWord-p. 10
4.1b  LCS Quality of ServiceWord-p. 11
4.2  Architectural Reference ModelWord-p. 12
4.2a  Interconnection between 5GC and EPCWord-p. 14
4.2b  Positioning methodsWord-p. 17
4.3  Functional description of LCS per network functionWord-p. 17
4.4  Reference Point to Support Location ServicesWord-p. 21
4.4.1  Le Reference PointWord-p. 21
4.4.2  NL3 Reference PointWord-p. 21
4.4.3  N1 Reference PointWord-p. 21
4.4.4  N2 Reference PointWord-p. 22
4.4.5Void
4.4.6  NL5 Reference PointWord-p. 22
4.4.7  NL2 Reference PointWord-p. 22
4.4.8  NL6 Reference PointWord-p. 22
4.4.9  N51 Reference PointWord-p. 22
4.4.10  NL1 Reference PointWord-p. 22
4.4.11  N52 Reference PointWord-p. 22
4.4.12  NL7 Reference PointWord-p. 22
4.5  Service Based Interfaces to Support Location ServicesWord-p. 22
5  High Level FeaturesWord-p. 23
5.1  LMF SelectionWord-p. 23
5.1a  GMLC Discovery and SelectionWord-p. 24
5.2  3GPP access specific aspectsWord-p. 24
5.3  Non-3GPP Access Specific AspectsWord-p. 24
5.3.1  Location Information for Non-3GPP AccessWord-p. 24
5.3.2  Access Type Selection for LCS ServiceWord-p. 25
5.4  UE LCS privacyWord-p. 26
5.4.1  GeneralWord-p. 26
5.4.2  Content of UE LCS Privacy ProfileWord-p. 26
5.4.3  Provision of UE LCS privacy profileWord-p. 28
5.4.4  Privacy Override Indicator (POI)Word-p. 28
5.4.5  LCS service authorization for an Immediate UE LocationWord-p. 28
5.4.6  LCS service authorization for a Deferred UE LocationWord-p. 29
5.5  Location service exposureWord-p. 30
5.6  LCS ChargingWord-p. 32
5.7  Support of Concurrent Location RequestsWord-p. 32
5.8  Interworking with the IMSWord-p. 33
6  Location Service ProceduresWord-p. 34
6.1  5GC-MT-LR ProcedureWord-p. 34
6.1.1  5GC-MT-LR procedure for the regulatory location serviceWord-p. 34
6.1.2  5GC-MT-LR Procedure for the commercial location serviceWord-p. 35
6.2  5GC-MO-LR ProcedureWord-p. 39
6.3  Deferred 5GC-MT-LR Procedure for Periodic, Triggered and UE Available Location EventsWord-p. 42
6.3.1  Initiation and Reporting of Location EventsWord-p. 42
6.3.2  Cancellation of Reporting of Location Events by a UEWord-p. 48
6.3.3  Cancellation of Reporting of Location Events by an AF or External LCS Client or GMLCWord-p. 49
6.4  LMF Change ProcedureWord-p. 50
6.5  Unified Location Service Exposure ProcedureWord-p. 52
6.5.1  Unified Location Service Exposure Procedure without routing by a UDMWord-p. 52
6.5.2  Unified Location Service Exposure Procedure with routing via a UDMWord-p. 54
6.6  NG-RAN Location Service Exposure ProcedureWord-p. 55
6.7  Low Power Periodic and Triggered 5GC-MT-LR ProceduresWord-p. 55
6.7.1  Event Reporting with no change of LMFWord-p. 56
6.7.2  Event Reporting with change of LMFWord-p. 57
6.8  Bulk Operation of LCS Service Request Targeting to Multiple UEsWord-p. 58
6.9  Procedures to Support Non-3GPP AccessWord-p. 60
6.9.1  Common Positioning Procedures when a UE is served by only one PLMNWord-p. 60
6.9.2  MT-LR Procedures when a UE is served by Different PLMNs for 3GPP Access and Non-3GPP AccessWord-p. 62
6.9.3  MO-LR Procedures when UE is served by the Different PLMNs via 3GPP Access and Non-3GPP AccessWord-p. 65
6.9.4  NI-LR Procedures when a UE is served by Different PLMNs for 3GPP access and non-3GPP accessWord-p. 65
6.10  Procedures dedicated to Support Regulatory servicesWord-p. 65
6.10.1  5GC-NI-LR ProcedureWord-p. 65
6.10.2  5GC-MT-LR Procedure without UDM QueryWord-p. 67
6.10.3  Location continuity for Handover of an Emergency session from NG-RANWord-p. 68
6.11  Common Sub-ProceduresWord-p. 69
6.11.1  UE Assisted and UE Based Positioning ProcedureWord-p. 69
6.11.2  Network Assisted Positioning ProcedureWord-p. 71
6.11.3  Obtaining Non-UE Associated Network Assistance DataWord-p. 71
6.12  UE Location Privacy Setting ProcedureWord-p. 73
6.12.1  UE Location Privacy Setting Procedure Initiated by UEWord-p. 73
6.12.2  UE Location Privacy Setting Procedure Initiated by AFWord-p. 73
6.13  Procedures with interaction between 5GC and EPCWord-p. 74
6.13.1  MT-LR ProcedureWord-p. 74
6.13.2  MO-LR Transfer to a Third Party ProcedureWord-p. 75
6.14  Procedures for Broadcast of Assistance DataWord-p. 76
6.14.1  Broadcast of Assistance Data by an LMFWord-p. 76
6.14.2  Delivery of Ciphering Keys to UEs for Broadcast Assistance DataWord-p. 77
7  Information storageWord-p. 79
8  Network Function ServicesWord-p. 83
8.3.1  GeneralWord-p. 83
8.3.2  Nlmf_Location serviceWord-p. 83
8.3.2.1  GeneralWord-p. 83
8.3.2.2  Nlmf_Location_DetermineLocation service operationWord-p. 83
8.3.2.3  Nlmf_Location_EventNotify service operationWord-p. 84
8.3.2.4  Nlmf_Location_CancelLocation service operationWord-p. 84
8.3.2.5  Nlmf_Location_LocationContextTransfer service operationWord-p. 84
8.3.3  Nlmf_Broadcast serviceWord-p. 85
8.3.3.1  GeneralWord-p. 85
8.3.3.2  Nlmf_Broadcast_CipheringKeyData service operationWord-p. 85
8.4.1  GeneralWord-p. 85
8.4.2  Ngmlc_Location serviceWord-p. 85
8.4.2.1  GeneralWord-p. 85
8.4.2.2  Ngmlc_Location_ProvideLocation service operationWord-p. 86
8.4.2.3  Ngmlc_Location_LocationUpdate service operationWord-p. 86
8.4.2.4  Ngmlc_Location_EventNotify service operationWord-p. 87
8.4.2.5  Ngmlc_Location_CancelLocation service operationWord-p. 87
8.4.2.6  Ngmlc_Location_LocationUpdateNotify service operationWord-p. 87
A  Differences with TS 23.271 [4]Word-p. 89
B  LCS privacy selection rule in serving NFWord-p. 93
C  Change historyWord-p. 94

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