ETSI TS 138 305 V15.5.0 (2020-01)

ETSI TS 138 305 V15.5.0 (2020-01)






TECHNICAL SPECIFICATION
5G;
NG Radio Access Network (NG-RAN);
Stage 2 functional specification of User Equipment (UE)
positioning in NG-RAN
(3GPP TS 38.305 version 15.5.0 Release 15)

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3GPP TS 38.305 version 15.5.0 Release 15 1 ETSI TS 138 305 V15.5.0 (2020-01)



Reference
RTS/TSGR-0238305vf50
Keywords
5G
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3GPP TS 38.305 version 15.5.0 Release 15 2 ETSI TS 138 305 V15.5.0 (2020-01)
Intellectual Property Rights
Essential patents
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pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
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"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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3GPP TS 38.305 version 15.5.0 Release 15 3 ETSI TS 138 305 V15.5.0 (2020-01)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 8
1 Scope . 9
2 References . 9
3 Definitions, symbols and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 11
4 Main concepts and requirements . 12
4.1 Assumptions and Generalities . 12
4.2 Role of UE Positioning Methods . 13
4.3 Standard UE Positioning Methods . 13
4.3.1 Introduction. 13
4.3.2 Network-assisted GNSS methods . 14
4.3.3 OTDOA positioning . 14
4.3.4 Enhanced Cell ID methods . 14
4.3.5 Barometric pressure sensor positioning . 15
4.3.6 WLAN positioning . 15
4.3.7 Bluetooth positioning . 15
4.3.8 TBS positioning . 15
4.3.9 Motion sensor positioning . 15
5 NG-RAN UE Positioning Architecture . 16
5.1 Architecture . 16
5.2 UE Positioning Operations . 17
5.3 NG-RAN Positioning Operations . 18
5.3.1 General NG-RAN Positioning Operations . 18
5.3.2 OTDOA Positioning Support . 18
5.4 Functional Description of Elements Related to UE Positioning in NG-RAN . 18
5.4.1 User Equipment (UE) . 18
5.4.2 gNB . 18
5.4.3 ng-eNB . 18
5.4.4 Location Management Function (LMF) . 19
6 Signalling protocols and interfaces . 19
6.1 Network interfaces supporting positioning operations . 19
6.1.1 General LCS control plane architecture . 19
6.1.2 NR-Uu interface . 19
6.1.3 LTE-Uu interface . 19
6.1.4 NG-C interface . 19
6.1.5 NLs interface . 20
6.2 UE-terminated protocols . 20
6.2.1 LTE Positioning Protocol (LPP) . 20
6.2.2 Radio Resource Control (RRC) for NR . 20
6.2.3 Radio Resource Control (RRC) for LTE . 20
6.3 NG-RAN Node terminated protocols . 20
6.3.1 NR Positioning Protocol A (NRPPa) . 20
6.3.2 NG Application Protocol (NGAP) . 21
6.4 Signalling between an LMF and UE . 21
6.4.1 Protocol Layering . 21
6.4.2 LPP PDU Transfer . 21
6.5 Signalling between an LMF and NG-RAN node . 23
6.5.1 Protocol Layering . 23
ETSI

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3GPP TS 38.305 version 15.5.0 Release 15 4 ETSI TS 138 305 V15.5.0 (2020-01)
6.5.2 NRPPa PDU Transfer for UE Positioning . 23
6.5.3 NRPPa PDU Transfer for Positioning Support . 24
6.6 Void . 25
7 General NG-RAN UE Positioning procedures . 25
7.1 General LPP procedures for UE Positioning . 25
7.1.1 LPP procedures . 25
7.1.2 Positioning procedures . 26
7.1.2.1 Capability transfer . 26
7.1.2.2 Assistance data transfer . 26
7.1.2.3 Location information transfer. 26
7.1.2.4 Multiple transactions . 26
7.1.2.5 Sequence of procedures . 26
7.1.2.6 Error handling . 26
7.1.2.7 Abort . 26
7.2 General NRPPa Procedures for UE Positioning . 27
7.2.1 NRPPa procedures . 27
7.2.2 NRPPa transaction types . 27
7.2.2.1 Location information transfer. 27
7.3 Service Layer Support using combined LPP and NRPPa Procedures . 28
7.3.1 General . 28
7.3.2 NI-LR and MT-LR Service Support . 28
7.4 General RRC procedures for UE Positioning . 29
7.4.1 NR RRC Procedures . 29
7.4.1.1 Location Measurement Indication . 29
7.4.2 LTE RRC Procedures . 29
7.4.2.1 Inter-frequency RSTD measurement indication . 30
8 Positioning methods and Supporting Procedures . 30
8.1 GNSS positioning methods . 30
8.1.1 General . 30
8.1.2 Information to be transferred between NG-RAN/5GC Elements . 31
8.1.2.1 Information that may be transferred from the LMF to UE . 31
8.1.2.1.1 Reference Time . 32
8.1.2.1.2 Reference Location . 32
8.1.2.1.3 Ionospheric Models . 32
8.1.2.1.4 Earth Orientation Parameters . 32
8.1.2.1.5 GNSS-GNSS Time Offsets . 32
8.1.2.1.6 Differential GNSS Corrections . 33
8.1.2.1.7 Ephemeris and Clock Models . 33
8.1.2.1.8 Real-Time Integrity . 33
8.1.2.1.9 Data Bit Assistance . 33
8.1.2.1.10 Acquisition Assistance . 33
8.1.2.1.11 Almanac. 33
8.1.2.1.12 UTC Models . 33
8.1.2.1.13 RTK Reference Station Information . 33
8.1.2.1.14 RTK Auxiliary Station Data . 33
8.1.2.1.15 RTK Observations . 34
8.1.2.1.16 RTK Common Observation Information . 34
8.1.2.1.17 GLONASS RTK Bias Information . 34
8.1.2.1.18 RTK MAC Correction Differences . 34
8.1.2.1.19 RTK Residuals . 34
8.1.2.1.20 RTK FKP Gradients . 34
8.1.2.1.21 SSR Orbit Corrections . 35
8.1.2.1.22 SSR Clock Corrections . 35
8.1.2.1.23 SSR Code Bias . 35
8.1.2.1a Recommendations for grouping of assistance data to support different RTK service levels . 35
8.1.2.2 Information that may be transferred from the UE to LMF . 37
8.1.2.2.1 GNSS Measurement Information . 37
8.1.2.2.1.1 UE-based mode . 37
8.1.2.2.1.2 UE-assisted mode . 38
8.1.2.2.2 Additional Non-GNSS Related Information. 38
ETSI

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3GPP TS 38.305 version 15.5.0 Release 15 5 ETSI TS 138 305 V15.5.0 (2020-01)
8.1.3 Assisted-GNSS Positioning Procedures. 38
8.1.3.1 Capability Transfer Procedure . 38
8.1.3.2 Assistance Data Transfer Procedure. 38
8.1.3.2.1 LMF initiated Assistance Data Delivery . 38
8.1.3.2.1a LMF initiated Periodic Assistance Data Delivery . 39
8.1.3.2.2 UE initiated Assistance Data Transfer . 39
8.1.3.2.2a UE initiated Periodic Assistance Data Transfer . 40
8.1.3.3 Location Information Transfer Procedure . 41
8.1.3.3.1 LMF initiated Location Information Transfer Procedure . 41
8.1.3.3.2 UE-initiated Location Information Delivery Procedure . 42
8.2 OTDOA positioning . 42
8.2.1 General . 42
8.2.2 Information to be transferred between NG-RAN/5GC Elements . 43
8.2.2.1 Information that may be transferred from the LMF to UE . 43
8.2.2.2 Information that may be transferred from the ng-eNB to LMF. 43
8.2.2.3 Information that may be transferred from the UE to LMF . 43
8.2.3 OTDOA Positioning Procedures . 44
8.2.3.1 Capability Transfer Procedure . 44
8.2.3.2 Assistance Data Transfer Procedure. 44
8.2.3.2.1 Assistance Data Transfer between LMF and UE . 44
8.2.3.2.1.1 LMF initiated Assistance Data Delivery . 44
8.2.3.2.1.2 UE initiated Assistance Data Transfer . 44
8.2.3.2.2 Assistance Data Delivery between LMF and ng-eNB . 45
8.2.3.2.2.1 LMF-initiated assistance data delivery to the LMF . 45
8.2.3.3 Location Information Transfer Procedure . 46
8.2.3.3.1 LMF-initiated Location Information Transfer Procedure . 46
8.2.3.3.2 UE-initiated Location Information Delivery procedure . 46
8.3 Enhanced cell ID positioning methods . 47
8.3.1 General . 47
8.3.2 Information to be transferred between NG-RAN/5GC Elements . 47
8.3.2.1 Information that may be transferred from the LMF to UE . 47
8.3.2.2 Information that may be transferred from the ng-eNB to LMF. 47
8.3.2.3 Information that may be transferred from the gNB to LMF . 48
8.3.2.4 Information that may be transferred from the UE to LMF . 48
8.3.3 Downlink E-CID Positioning Procedures . 48
8.3.3.1 Capability Transfer Procedure . 49
8.3.3.2 Assistance Data Transfer Procedure. 49
8.3.3.3 Location Information Transfer Procedure . 49
8.3.3.3.1 LMF-initiated Location Information Transfer . 49
8.3.3.3.2 UE-initiated Location Information Delivery procedure . 49
8.3.4 Uplink E-CID Positioning Procedures . 50
8.3.4.1 Capability Transfer Procedure . 50
8.3.4.2 Assistance Data Transfer Procedure. 50
8.3.4.3 Position Measurement Procedure . 50
8.3.4.3.1 LMF-initiated Position Measurement . 50
8.4 Barometric pressure sensor positioning . 51
8.4.2 Information to be transferred between NG-RAN/5GC Elements . 52
8.4.2.1 Information that may be transferred from the LMF to UE . 52
8.4.2.1.1 Barometric pressure sensor assistance data . 52
8.4.2.2 Information that may be transferred from the UE to LMF . 52
8.4.2.2.1 Standalone mode . 52
8.4.2.2.2 UE-assisted mode .
...