ETSI TS 143 059 V14.3.0 (2020-04)

Digital cellular telecommunications system (Phase 2+) (GSM); Functional stage 2 description of Location Services (LCS) in GERAN (3GPP TS 43.059 version 14.3.0 Release 14)

RTS/TSGR-0643059ve30

General Information

• Status: Published
• Publication Date: 07-Apr-2020
• Technical Committee: 3GPP RAN 6 - Legacy RAN radio and protocol
• Current Stage: 12 - Completion
• Completion Date: 08-Apr-2020

Standards Content (Sample)

ETSI TS 143 059 V14.3.0 (2020-04)






TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Functional stage 2 description of Location Services (LCS) in
GERAN
(3GPP TS 43.059 version 14.3.0 Release 14)

R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS

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3GPP TS 43.059 version 14.3.0 Release 14 1 ETSI TS 143 059 V14.3.0 (2020-04)



Reference
RTS/TSGR-0643059ve30
Keywords
GSM
ETSI
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3GPP TS 43.059 version 14.3.0 Release 14 2 ETSI TS 143 059 V14.3.0 (2020-04)
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ETSI

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3GPP TS 43.059 version 14.3.0 Release 14 3 ETSI TS 143 059 V14.3.0 (2020-04)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 7
1 Scope . 8
2 References . 8
3 Definitions and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 11
4 Main concepts . 12
4.1 Assumptions . 12
4.2 Standard LCS Methods . 12
4.2.1 Timing Advance . 12
4.2.2 Enhanced Observed Time Difference (E-OTD) positioning mechanism. 12
4.2.3 Global Navigation Satellite System (GNSS) based positioning mechanism . 12
4.2.4 Uplink Time Difference of Arrival (U-TDOA) positioning mechanism . 13
4.2.5 Multilateration Positioning Methods . 13
4.2.5.1 Multilateration Timing Advance . 13
4.2.5.2 Multilateration OTD. 13
5 GERAN LCS Architecture . 13
5.1 LCS Operations . 14
5.2 High-Level Functions . 15
5.2.1 Co-ordination, Measurement and Calculation Functions . 16
5.3 GERAN LCS Functional Entities . 17
5.3.1 Internal Client Group . 17
5.3.1.1 Internal GERAN Location Client Function (LCF) . 17
5.3.2 GERAN System Handling group . 17
5.3.2.1 GERAN Location System Control Function (LSCF) . 17
5.3.2.2 GERAN Location System Operations Function (LSOF) . 17
5.3.2.3 Location System Broadcast Function (LSBcF) . 17
5.3.3 Positioning group . 18
5.3.3.1 GERAN Position Radio Co-ordination Function (PRCF) . 18
5.3.3.2 GERAN Position Calculation Function (PCF) . 18
5.3.3.3 GERAN Position Signal Measurement Function (PSMF) . 19
5.3.3.4 GERAN Position Radio Resource Management (PRRM) . 19
5.4 Assignment of LCS Functional Entities to GERAN Elements . 19
5.5 Functional Description of GERAN LCS Network Elements . 19
5.5.1 BSC . 19
5.5.2 SMLC . 19
5.5.3 CBC . 20
5.5.4 LMU . 20
5.5.5 MS . 20
6 Signalling Protocols and Interfaces . 20
6.1 Protocol layering in A/Gb mode . 20
6.1.1 Generic Signalling Model . 20
6.1.2 Message Segmentation in A/Gb mode . 21
6.1.2.1 Network Level Segmentation . 21
6.1.2.2 Intermediate Level Segmentation . 22
6.1.2.3 RRLP Pseudo-Segmentation . 22
6.1.3 Signalling between an SMLC, MSC and BSC. 22
6.1.3a Signalling between an SMLC, SGSN and BSS . 22
6.1.4 Signaling between SMLC and MS . 23
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3GPP TS 43.059 version 14.3.0 Release 14 4 ETSI TS 143 059 V14.3.0 (2020-04)
6.1.5 SMLC Signalling to a Type A LMU . 24
6.1.5.1 Circuit Switched Signalling using an SDCCH . 24
6.1.5.2 Signalling using a TCH . 24
6.1.6 SMLC signalling to a Type B LMU . 25
6.1.7 SMLC Signalling to a peer SMLC . 26
6.2 Protocol layering in Iu mode . 26
6.2.1 Signalling between SMLC and MSC/SGSN . 26
6.2.2 Signalling between SMLC and MS . 27
6.2.3 SMLC signalling to a Type A LMU . 28
6.2.4 SMLC signalling to a Type B LMU . 28
6.2.5 SMLC signalling to a peer SMLC . 28
7 GERAN Network Location Procedures . 28
7.1 State description for SMLC . 28
7.1.1 SMLC States . 28
7.1.1.1 NULL State . 28
7.1.1.2 LOCATION State . 28
7.1.2 State Functionality . 29
7.1.2.1 State Transitions . 29
7.1.2.2 LOCATION Timer Function . 29
7.2 State Description for the BSC . 29
7.2.1 BSC States . 29
7.2.1.1 IDLE State. 29
7.2.1.2 LOCATION State . 29
7.2.2 State Functionality . 30
7.2.2.1 State Transitions . 30
7.2.2.2 LOCATION Timer Function . 30
7.3 Usage of SCCP Connection on the Lb interface in the CS domain in A/Gb mode . 30
7.3.1 SCCP Connection for positioning of a target MS . 30
7.3.2 SCCP connection to access a Type A LMU . 31
7.4 Usage of SCCP Connection on the Lb interface in the PS domain in A/Gb mode. 31
7.4.1 SCCP Connection for positioning of a target MS . 31
8 Common Procedures to Support Positioning . 32
8.1 Information Transfer between an SMLC and a Target MS in the CS Domain in A/Gb mode for E-OTD
and A-GNSS positioning methods . 32
8.1a Information Transfer between an SMLC and a Target MS in the PS Domain in A/Gb mode . 33
8.1b Information Transfer between an SMLC and a Target MS in Iu Mode . 34
8.2 Information Transfer between an SMLC and a BSC . 35
8.3 Common Procedures to Support Access to an LMU . 36
8.3.1 Location Update Procedure between an SMLC and a Type A LMU . 36
8.3.2 IMSI Detach Procedure between an SMLC and a Type A LMU . 36
8.3.3 LCS Information Transfer between an SMLC and a Type A LMU . 38
8.3.3.1 Information Transfer using an SDCCH. 38
8.3.3.2 Information Transfer using a TCH . 39
8.3.4 LCS Information Transfer between an SMLC and a Type B LMU . 40
8.4 Common Control Procedures for LMUs . 41
8.4.1 Reset Procedure . 41
8.4.2 Status Query Procedure . 41
8.4.3 Status Update Procedure . 42
8.5 Exception Procedures . 42
8.5.1 Procedures in the SMLC . 42
8.5.2 Procedures in an LMU . 43
8.5.3 Procedures in the BSC in the CS Domain . 43
8.5.3.1 General Procedures . 43
8.5.3.2 Rejection of an SMLC Positioning Request . 44
8.5.3.3 Interaction with Inter-BSC Handover . 44
8.5.3.4 Interaction with Intra-BSC Handover and other RR Management Procedures . 44
8.5.3.5 Priority of Handover and Other RR Management Procedures . 44
8.5.3.6 Interaction with Segmentation support for Legacy MS. 44
8.5.3.7 Overload . 45
8.5.4 Procedures in the BSS in the PS Domain . 45
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3GPP TS 43.059 version 14.3.0 Release 14 5 ETSI TS 143 059 V14.3.0 (2020-04)
8.5.4.1 General Procedures . 45
8.5.4.2 Rejection of an SMLC Positioning Request . 45
8.5.4.3 Overload . 45
8.5.4.4 Inter BSS Cell Change . 46
8.5.5 Void . 46
8.6 Procedures in the Target MS . 46
8.7 Further Procedures for Handover . 46
9 Positioning procedures . 46
9.1 Positioning Procedure Initiation . 46
9.1.1 Core Network Position Procedure Initiation over the A interface . 46
9.1.2 Positioning Procedure Initiation from an Internal LCS Client for the CS Domain (A/Gb mode) . 47
9.1.3 Core Network Position Procedure Initiation over the Gb interface . 47
9.1.3a Core Network Position Procedure Initiation over the Gb interface for Multilateration Positioning
methods . 48
9.1.4 Positioning Procedure Initiation from Core Network (Iu mode) . 49
9.1.5 Positioning Procedure Initiation from Internal LCS Client (Iu mode) . 49
9.2 Common Positioning Procedure for CS Domain in A/Gb mode . 49
9.2a Common Positioning Procedure for PS Domain in A/Gb mode . 50
9.2b Common Positioning Procedure for Iu mode . 51
9.2c GPRS Cell Change for the PS Domain in A/Gb mode . 52
9.2c.1 Intra-BSS Cell Change . 52
9.2c.2 Inter-BSS Cell Change . 52
9.3 TA Based Positioning in CS Domain for A/Gb-mode . 53
9.3.1 Definition of TA states . 53
9.3.1.1 MS in IDLE State . 53
9.3.1.2 MS in DEDICATED State . 53
9.3.2 TA Positioning Procedure . 54
9.3.3 Unsuccessful TA positioning procedure in BSC . 54
9.3a TA Based Positioning in PS Domain for A/Gb-mode . 54
9.3a.1 Definition of PS Domain TA Modes . 55
9.3a.1.1 MS in Packet Idle Mode . 55
9.3a.1.2 MS in Packet Transfer Mode . 55
9.3a.2 TA Positioning Procedure . 55
9.3a.2a TA Positioning Procedure for an MS in EC operation. 56
9.3a.3 Unsuccessful TA positioning procedure in BSS . 57
9.4 E-OTD and A-GNSS Positioning Procedures . 57
9.4.1 General procedures . 57
9.4.2 Positioning Request . 57
9.4.3 Assistance Data Delivery . 58
9.4.3a Positioning Capability Transfer . 59
9.4.4 Error Handling for E-OTD and A-GNSS in CS Domain . 60
9.4.5 Error Handling for the SMLC in CS Domain . 61
9.4.5a Error Handling for E-OTD and A-GNSS in PS Domain . 61
9.4.6 Broadcast of Assistance Data. 62
9.4.6.1 Point-To-Multipoint Assistance Data Broadcast Flow . 62
9.4.6.2 Ciphering . 63
9.4.6.2.1 Algorithm . 63
9.4.6.3 Deciphering key control and delivery to MS . 64
9.5 U-TDOA Positioning Procedures . 66
9.5.0 General . 66
9.5.1 U-TDOA Positioning in CS Domain for A/Gb-mode . 66
9.5.1.1 General Procedures . 66
9.5.1.2 CS U-TDOA Messages and Procedures on the Lb Interface .
...