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)

RTS/TSGR-0238305vf50

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Publication Date
16-Jan-2020
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17-Jan-2020
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ETSI TS 138 305 V15.5.0 (2020-01) - 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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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
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3GPP TS 38.305 version 15.5.0 Release 15 2 ETSI TS 138 305 V15.5.0 (2020-01)
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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 .........................................................................................

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