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TR 23.731 (SA2)
Study on enhancement
to the 5GC LoCation Services

use "3GPP‑Page" to get the Word version
for a better overview, the Table of Contents (ToC) is reproduced
V16.0.0 (Wzip)  2018/12  170 p.

Rapporteur:  Mr. Ai, Ming

The objectives of this Technical Report are to enhance the service-based architecture used for location services in the 5G system, and corresponding Network Functions (NFs) and procedures, to meet the service requirements defined in, SA1 (e.g. TS 22.261 and TS 22.071), including the consideration of roaming and non-roaming scenarios, and access via 3GPP as well as non-3GPP access technologies (un-trusted, and trusted in TR 23.716). Of particular consideration is how to support location services in 5GS and EPS interworking scenarios, and in non-3GPP access and 3GPP access interworking scenarios.

short Table of Contents for  TR 23.731  Word version:   16.0.0

each title links to the equivalent title in the full ToC

 

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1  ScopeWord-p. 11
2  ReferencesWord-p. 11
3  Definitions and abbreviationsWord-p. 12
4  Architectural Requirements and AssumptionsWord-p. 12
5  Key IssuesWord-p. 13
5.1  Key Issue 1: Enhancement to LCS ArchitectureWord-p. 13
5.2  Key Issue 2: Positioning via user plane transmissionWord-p. 14
5.3  Key Issue 3: Support of low latency and high performance LCSWord-p. 14
5.4  Key Issue 4: Reduce overhead for repetitive non-successful privacy verificationWord-p. 15
5.5  Key Issue 5: Slicing dependent location serviceWord-p. 15
5.6  Key Issue 6: ScalabilityWord-p. 16
5.7  Key Issue 7: Location service exposureWord-p. 16
5.8  Key Issue 8: Support of IoT UEsWord-p. 17
5.9  Key Issue 9: Support EUTRAN positioning methodsWord-p. 17
5.10  Key Issue 10: Support NR positioning methodsWord-p. 17
5.11  Key Issue 11: Coordination of Positioning Signalling Transmitted via Control Plane Path and User Plane PathWord-p. 17
5.12  Key Issue 12: LCS support for Non-3GPP accessWord-p. 18
5.13  Key Issue 13: Support of Flexible and Efficient Periodic and Triggered LocationWord-p. 18
5.14  Key Issue 14: Positioning Access selection for LCS serviceWord-p. 18
5.15  Key Issue 15: Location continuity supportWord-p. 19
5.16  Key Issue 16: Distribution Positioning Assistance DataWord-p. 19
6  SolutionsWord-p. 20
6.1  Solution 1: 5GS LCS Functionality and Allocation to 5GS elements - Option 1 and Option 2Word-p. 20
6.2  Solution 2: LMF Based Location SolutionWord-p. 25
6.3  Solution 3: Enhancement to LCS architectureWord-p. 52
6.4  Solution 4: Positioning operations considering different LMF deployment scenariosWord-p. 54
6.5  Solution 5: Privacy Check with UE privacy settingWord-p. 60
6.6  Solution 6: User Privacy Setting send via AMFUpWord-p. 65
6.7  Solution 7: User Privacy Setting send via LMFWord-p. 68
6.8  Solution 8: slice dependent LMF selectionWord-p. 70
6.9  Solution 9: Solution for position service exposureWord-p. 72
6.10  Solution 10: Solution for LDR type service exposure via NEFWord-p. 78
6.11  Solution 11: Solution for Location Service exposure to NG-RANUpWord-p. 84
6.12  Solution 12: LCS support for non-3GPP accessWord-p. 85
6.13  Solution 13: LCS support for non-3GPP accessWord-p. 89
6.14  Solution 14: Reuse R15 existing location service architecture for commercial use casesWord-p. 97
6.15  Solution 15: Enhancement to LCS architectureWord-p. 112
6.16  Solution 16: Solution for position via user plane transmissionWord-p. 117
6.17  Solution 17: Solution for Flexible and Efficient Periodic and Triggered LocationWord-p. 119
6.18  Solution #18: UDM based Positioning Access selection for LCS serviceWord-p. 122
6.19  Solution #19: Distribution of Positioning Assistance InformationWord-p. 124
6.20  Solution 20: LMF selection in GMLCWord-p. 128
6.21  Solution 21: Solution for Low Power Periodic and Triggered LocationWord-p. 132
6.22  Solution 22: LCS continuity Support for N26 based HandoverWord-p. 136
6.23  Solution #23: Unified NEF Location Service ExposureWord-p. 140
6.24  Solution #24: GMLC based Positioning Access selection for LCS serviceUpWord-p. 146
6.25  Solution #25: Coordination of Positioning Signalling Transmitted via Control Plane Path and User Plane PathWord-p. 148
6.26  Solution 26: Local LCS architectureWord-p. 149
6.27  Solution #27: Bulk operation of LCS service request targeting to multiple UEsWord-p. 153
6.28  Solution #28: Enhanced NG-RAN to support high accuracy location estimationWord-p. 156
7  EvaluationWord-p. 158
8  ConclusionsWord-p. 161
A  Supported positioning methodsWord-p. 164
B  Evaluation tables for Key IssuesWord-p. 167
C  Change historyWord-p. 170

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