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Content for  TS 23.273  Word version:  18.2.0

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1  Scopep. 10

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, to meet the service requirements defined in TS 22.261 and TS 22.071.
Location Services specified in the present document include regulatory location services and commercial location services. The architecture and signalling procedures in NG-RAN are defined in TS 38.305.

2  Referencesp. 10

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.
TR 21.905: "Vocabulary for 3GPP Specifications".
TS 22.071: "Technical Specification Group Systems Aspects; Location Services (LCS)".
TS 22.261: "Service requirements for the 5G system; Stage 1".
TS 23.271: "Functional stage 2 description of Location Services (LCS)".
TS 43.059: "Functional Stage 2 description of Location Services in GERAN".
[6]  Void.
TS 36.305: "Stage 2 functional specification of User Equipment (UE) positioning in E-UTRAN".
TS 23.032: "Universal Geographical Area Description (GAD)".
TS 38.305: "Stage 2 functional specification of User Equipment (UE) positioning in NG-RAN".
TS 23.167: "IP Multimedia Subsystem (IMS) emergency sessions".
TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
TS 29.572: "5G System; Location Management Services; Stage 3".
OMA MLP TS: "Mobile Location Protocol", [].
[14]  Void.
TS 38.455: "NG-RAN; NR Positioning Protocol A (NRPPa)".
TS 29.518: "5G System; Access and Mobility Management Services; Stage 3".
TS 25.305: "Stage 2 functional specification of User Equipment (UE) positioning in UTRAN".
TS 23.501: "System Architecture for the 5G System; Stage 2".
TS 23.502: "Procedures for the 5G System; Stage 2".
TS 37.355: "LTE Positioning Protocol (LPP)".
TS 23.316: "Wireless and wireline convergence access support for the 5G System (5GS)".
[22]  Void.
ITU-T Recommendation E.164: "The international public telecommunication numbering plan".
TS 23.222: "Common Application Programming Interface (API) framework for 3GPP northbound APIs".
RFC 2396:  "Uniform Resource Identifiers".
RFC 3261:  "SIP: Session Initiation Protocol".
TS 23.228: "IP multimedia subsystem (IMS)".
TS 23.003: "Numbering, addressing and identification".
TS 29.002: "Mobile Application Part (MAP) specification".
TS 32.271: "Telecommunication management; Charging management; Location Services (LCS) charging".
TS 32.298: "Telecommunication management; Charging management; Charging Data Record (CDR) parameter description".
[32]  Void.
TS 29.571: "5G System; Common Data Types for Service Based Interfaces; Stage 3".
[34]  Void.
TS 29.122: "T8 reference point for Northbound APIs".
TS 24.571: "5G System (5GS); Control plane Location Services (LCS) procedures; Stage 3".
TS 23.288: "Architecture enhancements for 5G System (5GS) to support network data analytics services".
TS 38.413: "NG-RAN; NG Application Protocol (NGAP)".
TS 22.104: "Service requirements for cyber-physical control applications in vertical domains".
TS 23.586: "Architectural Enhancements to support Ranging based services and Sidelink Positioning".
TS 23.503: "Policy and charging control framework for the 5G System (5GS); Stage 2".
TS 23.632: "User data interworking, coexistence and migration; Stage 2".
TS 29.563: "Home Subscriber Server (HSS) services for interworking with Unified Data Management (UDM); Stage 3".

3  Definitions and Abbreviationsp. 11

3.1  Definitionsp. 11

For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
5G enhanced positioning area:
see TS 22.261.
5G positioning service area:
see TS 22.261.
LCS Client:
entity that interacts with GMLC for the purpose of obtaining location information for one or more UEs. The LCS Client may reside in the UE.
For the purposes of the present document, the following terms and definitions given in TS 23.271 apply:
Call Related:
see TS 23.271.
see TS 23.271.
Current Location:
see TS 23.271.
Deferred location request:
see TS 23.271.
DL Positioning:
positioning of a target UE in which the target UE obtains downlink measurements for a 3GPP RAT.
GNSS Assistance Data:
Immediate location request:
see TS 23.271.
Last Known Location:
see TS 23.271.
LCS (LoCation Services):
see TS 23.271.
Local Co-ordinates:
see TS 23.032.
Local Location:
location determined by Local Co-ordinate(s).
Located UE:
see TS 23.586.
Location Estimate:
see TS 23.271.
LOS/NLOS measurement indication:
LOS-NLOS-Indicator as defined in TS 37.355 or LOS/NLOS information as defined in TS 38.455.
Positioning Reference Unit (PRU):
see TS 38.305.
Mobile Base Station Relay:
see TS 23.501.
PRU association:
association of a PRU with an LMF by providing PRU related information to an LMF.
PRU dis-association:
remove the PRU related information to dis-associate a PRU with an LMF.
see TS 23.271.
Pseudonym mediation device:
Functionality that verifies pseudonyms to verinyms.
RAT Independent Positioning:
positioning of a target UE in which the target UE obtains measurements not related to a 3GPP RAT.
see TS 23.271.
Requestor Identity:
see TS 23.271.
Response Method:
for LCS Client using the OMA MLP protocol. Detail see TS 23.271.
Scheduled Location Time:
a future global time (e.g. UTC) at which a UE is to be located.
Service Type:
see TS 23.271.
Sidelink Positioning:
Target UE:
see TS 23.271.
UL Positioning:
positioning of a target UE in which NG-RAN obtains uplink measurements of the target UE for a 3GPP RAT.
UL+DL Positioning:
positioning of a target UE using both DL Positioning and UL Positioning.
see TS 23.271.
see TS 23.271.

3.2  Abbreviationsp. 13

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
Access Point Name
APN Network Identifier
Early Data Transmission
Evolved Serving Mobile Location Centre
Gateway Mobile Location Centre
LoCation Services
Location Deferred Request
Location Immediate Request
Location Management Function
LCS Privacy Indicator
Low Power and High Accuracy Positioning
Location Retrieval Function
Mobile Base Station Relay
Mobile Originated Location Request
Mobile Terminated Location Request
Network Induced Location Request
Pseudonym mediation device functionality
Privacy Override Indicator
Positioning Reference Unit
Small Data Transmission
Sidelink Mobile Originating Location Request
Sidelink Mobile Terminating Location Request
Trusted Non-3GPP Access Network
Trusted Non-3GPP Access Point
Trusted WLAN Access Point
Visited GMLC

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