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TECHNICAL SPECIFICATION
LTE;
Evolved Universal Terrestrial
Radio Access Network (E-UTRAN);
Stage 2 functional specification of User Equipment (UE)
positioning in E-UTRAN
(3GPP TS 36.305 version 15.2.0 Release 15)
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3GPP TS 36.305 version 15.2.0 Release 15 1 ETSI TS 136 305 V15.2.0 (2019-04)
Reference
RTS/TSGR-0236305vf20
Keywords
LTE
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3GPP TS 36.305 version 15.2.0 Release 15 2 ETSI TS 136 305 V15.2.0 (2019-04)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
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Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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3GPP TS 36.305 version 15.2.0 Release 15 3 ETSI TS 136 305 V15.2.0 (2019-04)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 8
1 Scope . 9
2 References . 9
3 Definitions 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 Network-assisted GNSS Methods . 14
4.3.2 Downlink positioning . 14
4.3.3 Enhanced Cell ID Methods . 15
4.3.4 Uplink positioning . 15
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
5 E-UTRAN UE Positioning Architecture . 16
5.1 UE Positioning Operations . 16
5.2 E-UTRAN Positioning Operations . 18
5.2.1 Downlink Position Method Support . 18
5.2.2 Uplink Position Method Support . 18
5.2.3 Assistance Information Broadcast Support . 18
5.3 Functional Description of Elements Related to UE Positioning in E-UTRAN . 18
5.3.1 User Equipment (UE) . 18
5.3.2 eNode B . 19
5.3.3 Evolved Serving Mobile Location Centre (E-SMLC) . 19
5.3.4 Location Measurement Unit (LMU) . 19
6 Signalling protocols and interfaces . 20
6.1 Network interfaces supporting positioning operations . 20
6.1.1 General LCS control plane architecture . 20
6.1.2 LTE-Uu interface . 20
6.1.3 S1-MME interface . 20
6.1.4 SLs interface . 20
6.1.5 SLm interface . 20
6.2 UE-terminated protocols . 20
6.2.1 LTE Positioning Protocol (LPP) . 20
6.2.2 Radio Resource Control (RRC) . 21
6.3 eNB-terminated protocols . 21
6.3.1 LTE Positioning Protocol Annex (LPPa). 21
6.3.2 S1 Application Protocol (S1-AP) . 22
6.4 Signalling between an E-SMLC and UE . 22
6.4.1 Protocol Layering . 22
6.4.2 LPP PDU Transfer . 22
6.5 Signalling between an E-SMLC and eNode B . 23
6.5.1 Protocol Layering . 23
6.5.2 LPPa PDU Transfer for UE Positioning . 24
6.5.3 LPPa PDU Transfer for Positioning Support . 25
6.5.4 LPPa PDU Transfer for Assistance Information Broadcast . 25
ETSI
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3GPP TS 36.305 version 15.2.0 Release 15 4 ETSI TS 136 305 V15.2.0 (2019-04)
6.6 LMU-terminated protocols . 26
6.6.1 SLm Application Protocol (SLmAP) . 26
6.7 Signalling between an E-SMLC and LMU . 27
6.7.1 Protocol Layering . 27
7 General E-UTRAN UE Positioning procedures . 27
7.1 General LPP procedures for UE Positioning . 27
7.1.1 LPP Procedures . 27
7.1.2 Positioning procedures . 28
7.1.2.1 Capability transfer . 28
7.1.2.2 Assistance data transfer . 28
7.1.2.3 Location information transfer. 29
7.1.2.4 Multiple transactions . 30
7.1.2.5 Sequence of Procedures . 31
7.1.2.6 Error handling . 31
7.1.2.7 Abort . 32
7.1.3 UE positioning measurements in idle state for NB-IoT . 32
7.2 General LPPa Procedures for UE Positioning . 34
7.2.1 LPPa Procedures . 34
7.2.2 LPPa transaction types . 34
7.2.2.1 Location information transfer. 34
7.3 Service Layer Support using combined LPP and LPPa Procedures . 35
7.3.1 NI-LR and MT-LR Service Support . 35
7.3.2 MO-LR Service Support . 36
7.4 General SLmAP Procedures for UE Positioning . 37
7.4.1 SLmAP Procedures . 37
7.4.1.1 Measurement request . 37
7.4.1.2 Measurement Update . 37
7.4.1.3 Measurement Abort . 38
7.5 Service Layer Support using combined SLmAP and LPPa Procedures . 38
7.5.1 NI-LR and MT-LR Service Support . 38
7.5.2 MO-LR Service Support . 39
7.6 Procedures for Broadcast of Assistance Data . 39
7.6.1 General . 39
7.6.2 Broadcast Procedures . 40
8 Positioning methods and Supporting Procedures . 41
8.1 GNSS positioning methods . 41
8.1.1 General . 41
8.1.2 Information to be transferred between E-UTRAN Elements . 42
8.1.2.1 Information that may be transferred from the E-SMLC to UE . 42
8.1.2.1.1 Reference Time . 43
8.1.2.1.2 Reference Location . 43
8.1.2.1.3 Ionospheric Models . 43
8.1.2.1.4 Earth Orientation Parameters . 43
8.1.2.1.5 GNSS-GNSS Time Offsets . 43
8.1.2.1.6 Differential GNSS Corrections . 43
8.1.2.1.7 Ephemeris and Clock Models . 43
8.1.2.1.8 Real-Time Integrity . 43
8.1.2.1.9 Data Bit Assistance . 43
8.1.2.1.10 Acquisition Assistance . 43
8.1.2.1.11 Almanac. 44
8.1.2.1.12 UTC Models . 44
8.1.2.1.13 RTK Reference Station Information . 44
8.1.2.1.14 RTK Auxiliary Station Data . 44
8.1.2.1.15 RTK Observations . 44
8.1.2.1.16 RTK Common Observation Information . 44
8.1.2.1.17 GLONASS RTK Bias Information . 44
8.1.2.1.18 RTK MAC Correction Differences . 45
8.1.2.1.19 RTK Residuals . 45
8.1.2.1.20 RTK FKP Gradients . 45
8.1.2.1.21 SSR Orbit Corrections . 45
ETSI
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3GPP TS 36.305 version 15.2.0 Release 15 5 ETSI TS 136 305 V15.2.0 (2019-04)
8.1.2.1.22 SSR Clock Corrections . 45
8.1.2.1.23 SSR Code Bias . 45
8.1.2.1a Recommendations for grouping of assistance data to support different RTK service levels . 45
8.1.2.2 Information that may be transferred from the UE to the E-SMLC. 47
8.1.2.2.1 GNSS Measurement Information . 47
8.1.2.2.1.1 UE-based mode . 47
8.1.2.2.1.2 UE-assisted mode . 48
8.1.2.2.2 Additional Non-GNSS Related Information. 48
8.1.3 Assisted-GNSS Positioning Procedures. 48
8.1.3.1 Capability Transfer Procedure . 48
8.1.3.1.1 Void . 48
8.1.3.2 Assistance Data Transfer Procedure. 48
8.1.3.2.1 E-SMLC initiated Assistance Data Delivery . 48
8.1.3.2.1a E-SMLC initiated Periodic Assistance Data Delivery . 49
8.1.3.2.2 UE initiated Assistance Data Transfer . 49
8.1.3.2.2a UE initiated Periodic Assistance Data Transfer . 50
8.1.3.3 Location Information Transfer Procedure . 51
8.1.3.3.1 E-SMLC initiated Location Information Transfer Procedure . 51
8.1.3.3.2 UE-initiated Location Information Delivery Procedure . 52
8.2 Downlink positioning method . 52
8.2.1 General . 52
8.2.2 Transferred information . 52
8.2.2.1 Assistance Data that may be transferred from the E-SMLC to UE . 52
8.2.2.2 Assistance Data that may be transferred from the eNodeB to E-SMLC . 52
8.2.2.3 Location Information that may be transferred from the UE to E-SMLC . 53
8.2.3 Downlink Positioning Procedures . 53
8.2.3.1 Capability Transfer Procedure . 53
8.2.3.1.1 Void . 53
8.2.3.2 Assistance Data Transfer Procedure. 53
8.2.3.2.1 Assistance Data Transfer between E-SMLC and UE . 53
8.2.3.2.1.1 E-SMLC-initiated assistance data delivery. 53
8.2.3.2.1.2 UE-initiated assistance data transfer . 54
8.2.3.2.2 Assistance Data Delivery between E-SMLC and eNodeB . 55
8.2.3.2.2.1 Void . 55
8.2.3.2.2.2 E-SMLC-initiated assistance data delivery to the E-SMLC . 55
8.2.3.3 Location Information Transfer Procedure . 55
8.2.3.3.1 E-SMLC-initiated Location Information Transfer . 55
8.2.3.3.2 UE-initiated Location Information Delivery procedure . 56
8.3 Enhanced cell ID positioning methods . 56
8.3.1 General . 56
8.3.2 Information to be transferred between E-UTRAN Elements . 57
8.3.2.1 Information that may be transferred from the E-SMLC to UE . 57
8.3.2.2 Information that may be transferred from the UE to E-SMLC . 57
8.3.2.3 Information that may be transferred from the eNodeB to E-SMLC . 57
8.3.3 Downlink E-CID Positioning Procedures . 58
8.3.3.1 Capability Transfer Procedure . 58
8.3.3.1.1 Void . 58
8.3.3.2 Assistance Data Delivery Procedure . 58
8.3.3.3 Location Information Transfer Procedure . 58
8.3.3.3.1 E-SMLC-initiated Location Information Transfer .
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