TS 38.305
RAN2
★
Stage 2 functional specification of
UE Positioning in NG-RAN
use "3GPP‑Page" to get the Word version
use "ETSI‑search" to get the PDF version
the ToC, based on the Word version, is reproduced for a better overview
use "ETSI‑search" to get the PDF version
the ToC, based on the Word version, is reproduced for a better overview
V16.0.0 (Wzip)
2020/03 107 p.
V15.5.0 (PDF)
2019/12 74 p.
WI Acronym: NR_newRAT
Rapporteur: Dr. Fischer, Sven Qualcomm CDMA Technologies
Rapporteur: Dr. Fischer, Sven Qualcomm CDMA Technologies
The present document specifies the stage 2 of the UE Positioning function of NG-RAN which provides the mechanisms to support or assist the calculation of the geographical position of a UE. UE position knowledge can be used, for example, in support of Radio Resource Management functions, as well as location-based services for operators, subscribers, and third-party service providers. The purpose of this stage 2 specification is to define the NG-RAN UE Positioning architecture, functional entities and operations to support positioning methods. This description is confined to the NG-RAN Access Stratum. It does not define or describe how the results of the UE position calculation can be utilised in the Core Network (e.g., LCS) or in NG-RAN (e.g., RRM).
UE Positioning may be considered as a network-provided enabling technology consisting of standardised service capabilities that enable the provision of location applications. The application(s) may be service provider specific. The description of the numerous and varied possible location applications which are enabled by this technology is outside the scope of the present document. However, clarifying examples of how the functionality being described may be used to provide specific location services may be included.
This stage 2 specification covers the NG-RAN positioning methods, state descriptions, and message flows to support UE Positioning.
full Table of Contents for TS 38.305 Word version: 15.5.0
1 Scope
2 References
3 Definitions, symbols and abbreviations
4 Main concepts and requirements
5 NG-RAN UE Positioning Architecture
6 Signalling protocols and interfaces
7 General NG-RAN UE Positioning procedures
8 Positioning methods and Supporting Procedures
8.1 GNSS positioning methods
8.2 OTDOA positioning
8.3 Enhanced cell ID positioning methods
8.4 Barometric pressure sensor positioning
8.5 WLAN positioning
8.6 Bluetooth positioning
8.7 TBS positioning
8.8 Motion sensor positioning method
A Use of LPP with SUPL
B Change history
1 Scope Word-p. 9
2 References
3 Definitions, symbols and abbreviations Word-p. 10
4 Main concepts and requirements Word-p. 12
4.1 Assumptions and Generalities
4.2 Role of UE Positioning Methods Word-p. 13
4.3 Standard UE Positioning Methods
5 NG-RAN UE Positioning Architecture Word-p. 16
5.1 Architecture
5.2 UE Positioning Operations Word-p. 17
5.3 NG-RAN Positioning Operations Word-p. 18
5.4 Functional Description of Elements Related to UE Positioning in NG-RAN
6 Signalling protocols and interfaces
6.1 Network interfaces supporting positioning operations 
6.4 Signalling between an LMF and UE
6.5 Signalling between an LMF and NG-RAN node Word-p. 23
7 General NG-RAN UE Positioning procedures Word-p. 25
6.1.1 General LCS control plane architecture
6.1.2 NR-Uu interface
6.1.3 LTE-Uu interface
6.1.4 NG-C interface
6.1.5 NLs interface Word-p. 20
6.2 UE-terminated protocols
6.2.1 LTE Positioning Protocol (LPP)
6.2.2 Radio Resource Control (RRC) for NR
6.2.3 Radio Resource Control (RRC) for LTE
6.3 NG-RAN Node terminated protocols
6.4 Signalling between an LMF and UE
6.5 Signalling between an LMF and NG-RAN node Word-p. 23
6.5.1 Protocol Layering
6.5.2 NRPPa PDU Transfer for UE Positioning
6.5.3 NRPPa PDU Transfer for Positioning Support Word-p. 24
6.6 Void
7.1 General LPP procedures for UE Positioning
7.2 General NRPPa Procedures for UE Positioning Word-p. 27
7.3 Service Layer Support using combined LPP and NRPPa Procedures Word-p. 28
7.4 General RRC procedures for UE Positioning Word-p. 29
8 Positioning methods and Supporting Procedures
8.1 GNSS positioning methods
A Use of LPP with SUPL Word-p. 67
8.1.1 General
8.1.2 Information to be transferred between NG-RAN/5GC Elements Word-p. 31
8.2 OTDOA positioning
8.1.2.1 Information that may be transferred from the LMF to UE
8.1.3 Assisted-GNSS Positioning Procedures
8.1.2.1.1 Reference Time Word-p. 32
8.1.2.1.2 Reference Location
8.1.2.1.3 Ionospheric Models
8.1.2.1.4 Earth Orientation Parameters
8.1.2.1.5 GNSS-GNSS Time Offsets
8.1.2.1.6 Differential GNSS Corrections Word-p. 33
8.1.2.1.7 Ephemeris and Clock Models
8.1.2.1.8 Real-Time Integrity
8.1.2.1.9 Data Bit Assistance
8.1.2.1.10 Acquisition Assistance
8.1.2.1.11 Almanac
8.1.2.1.12 UTC Models
8.1.2.1.13 RTK Reference Station Information
8.1.2.1.14 RTK Auxiliary Station Data
8.1.2.1.15 RTK Observations Word-p. 34
8.1.2.1.16 RTK Common Observation Information
8.1.2.1.17 GLONASS RTK Bias Information
8.1.2.1.18 RTK MAC Correction Differences
8.1.2.1.19 RTK Residuals
8.1.2.1.20 RTK FKP Gradients
8.1.2.1.21 SSR Orbit Corrections Word-p. 35
8.1.2.1.22 SSR Clock Corrections
8.1.2.1.23 SSR Code Bias
8.1.2.1a Recommendations for grouping of assistance data to support different RTK service levels
8.1.2.2 Information that may be transferred from the UE to LMF Word-p. 37
8.1.2.1.4 Earth Orientation Parameters
8.1.2.1.5 GNSS-GNSS Time Offsets
8.1.2.1.6 Differential GNSS Corrections Word-p. 33
8.1.2.1.7 Ephemeris and Clock Models
8.1.2.1.8 Real-Time Integrity
8.1.2.1.9 Data Bit Assistance
8.1.2.1.10 Acquisition Assistance
8.1.2.1.11 Almanac
8.1.2.1.12 UTC Models
8.1.2.1.13 RTK Reference Station Information
8.1.2.1.14 RTK Auxiliary Station Data
8.1.2.1.15 RTK Observations Word-p. 34
8.1.2.1.16 RTK Common Observation Information
8.1.2.1.17 GLONASS RTK Bias Information
8.1.2.1.18 RTK MAC Correction Differences
8.1.2.1.19 RTK Residuals
8.1.2.1.20 RTK FKP Gradients
8.1.2.1.21 SSR Orbit Corrections Word-p. 35
8.1.2.1.22 SSR Clock Corrections
8.1.2.1.23 SSR Code Bias
8.1.3.1 Capability Transfer Procedure
8.1.3.2 Assistance Data Transfer Procedure
8.1.3.2.1 LMF initiated Assistance Data Delivery
8.1.3.2.1a LMF initiated Periodic Assistance Data Delivery Word-p. 39
8.1.3.2.2 UE initiated Assistance Data Transfer
8.1.3.2.2a UE initiated Periodic Assistance Data Transfer Word-p. 40
8.1.3.3 Location Information Transfer Procedure Word-p. 41
8.1.3.2.1a LMF initiated Periodic Assistance Data Delivery Word-p. 39
8.1.3.2.2 UE initiated Assistance Data Transfer
8.1.3.2.2a UE initiated Periodic Assistance Data Transfer Word-p. 40
8.2.1 General
8.2.2 Information to be transferred between NG-RAN/5GC Elements Word-p. 43
8.3 Enhanced cell ID positioning methods Word-p. 47
8.2.2.1 Information that may be transferred from the LMF to UE
8.2.2.2 Information that may be transferred from the ng-eNB to LMF
8.2.2.3 Information that may be transferred from the UE to LMF
8.2.3 OTDOA Positioning Procedures Word-p. 44
8.2.2.2 Information that may be transferred from the ng-eNB to LMF
8.2.2.3 Information that may be transferred from the UE to LMF
8.2.3.1 Capability Transfer Procedure
8.2.3.2 Assistance Data Transfer Procedure
8.2.3.2.1 Assistance Data Transfer between LMF and UE
8.2.3.3 Location Information Transfer Procedure Word-p. 46
8.2.3.2.1.1 LMF initiated Assistance Data Delivery
8.2.3.2.1.2 UE initiated Assistance Data Transfer
8.2.3.2.2 Assistance Data Delivery between LMF and ng-eNB Word-p. 45
8.3.1 General
8.3.2 Information to be transferred between NG-RAN/5GC Elements
8.4 Barometric pressure sensor positioning Word-p. 51
8.3.2.1 Information that may be transferred from the LMF to UE
8.3.2.2 Information that may be transferred from the ng-eNB to LMF
8.3.2.3 Information that may be transferred from the gNB to LMF Word-p. 48
8.3.2.4 Information that may be transferred from the UE to LMF
8.3.3 Downlink E-CID Positioning Procedures
8.3.3.1 Capability Transfer Procedure Word-p. 49
8.3.3.2 Assistance Data Transfer Procedure
8.3.3.3 Location Information Transfer Procedure
8.3.4 Uplink E-CID Positioning Procedures Word-p. 50
8.4.2 Information to be transferred between NG-RAN/5GC Elements
8.5 WLAN positioning
8.4.2.1 Information that may be transferred from the LMF to UE
8.4.2.2 Information that may be transferred from the UE to LMF
8.4.3 Barometric Pressure Sensor Positioning Procedures
8.5.1 General
8.5.2 Information to be transferred between NG-RAN/5GC Elements Word-p. 55
8.6 Bluetooth positioning
8.5.2.1 Information that may be transferred from the LMF to UE
8.5.3 WLAN Positioning Procedures
8.5.2.1.1 WLAN AP BSSID
8.5.2.1.2 WLAN AP SSID
8.5.2.1.3 WLAN AP Type Data
8.5.2.1.4 WLAN AP Location
8.5.2.2 Information that may be transferred from the UE to LMF
8.6.2 Information to be transferred between NG-RAN/5GC Elements Word-p. 59
8.7 TBS positioning Word-p. 61
8.6.2.1 Information that may be transferred from the LMF to UE
8.6.2.2 Information that may be transferred from the UE to LMF
8.6.3 Bluetooth Positioning Procedures
8.6.2.2 Information that may be transferred from the UE to LMF
8.7.1 General
8.7.2 Information to be transferred between NG-RAN/5GC Elements
8.8 Motion sensor positioning method
8.7.2.1 Information that may be transferred from the LMF to UE
8.7.2.2 Information that may be transferred from the UE to LMF
8.7.3 TBS Positioning Procedures
A.1 SUPL 2.0 Positioning Methods and Positioning Protocols
A.2 SUPL 2.0 and NR Architecture Word-p. 68
A.3 LPP session procedures using SUPL Word-p. 69
A.4 Procedures combining C-plane and U-plane operations Word-p. 70
B Change history Word-p. 72
