ETSI TS 123 271 V9.2.0 (2010-01) Technical Specification Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Functional stage 2 description of Location Services (LCS) (3GPP TS 23.271 version 9.2.0 Release 9) 3GPP TS 23.271 version 9.2.0 Release 9 1 ETSI TS 123 271 V9.2.0 (2010-01) Reference RTS/TSGS-0223271v920 Keywords GSM, LTE, UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). 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ETSI 3GPP TS 23.271 version 9.2.0 Release 9 3 ETSI TS 123 271 V9.2.0 (2010-01) Contents Intellectual Property Rights ................................................................................................................................ 2 Foreword ............................................................................................................................................................. 2 Foreword ............................................................................................................................................................. 9 1 Scope ...................................................................................................................................................... 10 2 References .............................................................................................................................................. 10 3 Definitions, symbols and abbreviations ................................................................................................. 12 3.1 Definitions ........................................................................................................................................................ 12 3.2 Symbols ............................................................................................................................................................ 15 3.3 Abbreviations ................................................................................................................................................... 16 4 Main concepts ........................................................................................................................................ 19 4.1 Assumptions ..................................................................................................................................................... 19 4.2 Location Services Categories ........................................................................................................................... 20 4.3 Positioning methods ......................................................................................................................................... 20 4.3.1 Standard LCS Methods in UTRAN ............................................................................................................ 20 4.3.2 Standard LCS Methods in GERAN ............................................................................................................ 21 4.3.3 Standard LCS Methods in E-UTRAN ........................................................................................................ 21 4.4 Types of Location Request ............................................................................................................................... 21 4.4.1 Immediate Location Request ...................................................................................................................... 21 4.4.2 Deferred Location Request ......................................................................................................................... 21 4.4.2.1 Types of event ....................................................................................................................................... 21 4.5 Concurrent Location Requests ......................................................................................................................... 22 5 General LCS architecture ....................................................................................................................... 22 5.1 LCS access interfaces ....................................................................................................................................... 22 5.2 LCS Functional diagram, high level functions ................................................................................................. 24 5.3 LCS Client functional group ............................................................................................................................ 25 5.3.1 External Location Client Function (LCF) ................................................................................................... 25 5.4 LCS Server functional group ............................................................................................................................ 25 5.4.1 Client handling component ......................................................................................................................... 25 5.4.1.1 Location Client Control Function (LCCF) ............................................................................................ 25 5.4.1.2 Location Client Authorization Function (LCAF) .................................................................................. 25 5.4.1.2.1 Access Subfunction ......................................................................................................................... 25 5.4.1.2.2 Subscription Subfunction ................................................................................................................ 26 5.4.1.3 Location Client Co-ordinate Transformation Function (LCCTF) ......................................................... 26 5.4.1.4 Location Client Zone Transformation Function (LCZTF) .................................................................... 26 5.4.2 System handling component ....................................................................................................................... 26 5.4.2.1 Location System Control Function(LSCF) ........................................................................................... 26 5.4.2.2 Location System Billing Function (LSBF) ........................................................................................... 27 5.4.2.3 Location System Operations Function (LSOF) ..................................................................................... 27 5.4.2.4 Location System Broadcast Function (LSBcF) ..................................................................................... 27 5.4.2.5 Location System Co-ordinate Transformation Function (LSCTF) ....................................................... 27 5.4.2.6 Location IMS – Interworking Function (LIMS-IWF) ........................................................................... 27 5.4.3 Subscriber handling Component ................................................................................................................. 27 5.4.3.1 Location Subscriber Authorization Function (LSAF) ........................................................................... 27 5.4.3.2 Location Subscriber Translation Function (LSTF) ............................................................................... 27 5.4.3.3 Location Subscriber Privacy Function (LSPF)...................................................................................... 27 5.4.4 Positioning components .............................................................................................................................. 27 5.5 Information Flows between Client and Server ................................................................................................. 28 5.5.1 Location Service Request ........................................................................................................................... 28 5.5.2 Location Service Response ......................................................................................................................... 29 5.6 Information Flows between LCS Servers ......................................................................................................... 30 5.6.1 Location Service Request ........................................................................................................................... 30 5.6.2 Location Service Response ......................................................................................................................... 31 ETSI 3GPP TS 23.271 version 9.2.0 Release 9 4 ETSI TS 123 271 V9.2.0 (2010-01) 6 LCS Architecture .................................................................................................................................... 32 6.1 Schematic functional description of LCS operations ....................................................................................... 34 6.2 Allocation of LCS functions to network elements ........................................................................................... 35 6.3 Functional description of LCS per network element ........................................................................................ 38 6.3.1 Access Network .......................................................................................................................................... 38 6.3.2 LCS Clients, LCS applications and Requestors .......................................................................................... 39 6.3.3 Gateway Mobile Location Centre, GMLC ................................................................................................. 39 6.3.3A Location Retrieval Function, LRF .............................................................................................................. 39 6.3.4 LCS support in the UE ................................................................................................................................ 40 6.3.5 MSC/VLR ................................................................................................................................................... 40 6.3.6 MSC Server ................................................................................................................................................ 40 6.3.7 SGSN .......................................................................................................................................................... 40 6.3.8 Home Location Register, HLR ................................................................................................................... 41 6.3.9 HSS ............................................................................................................................................................. 41 6.3.10 gsmSCF ...................................................................................................................................................... 41 6.3.11 Privacy Profile Register, PPR ..................................................................................................................... 41 6.3.12 Pseudonym Mediation Device, PMD.......................................................................................................... 41 6.3.13 Mobility Management Entity, MME .......................................................................................................... 41 6.3.14 Evolved Serving Mobile Location Centre, E-SMLC .................................................................................. 41 6.4 Addressing the target UE for LCS purposes .................................................................................................... 42 6.4.1 Verinyms for the target UE ......................................................................................................................... 42 6.4.2 Pseudonyms for the target UE .................................................................................................................... 42 6.4.3 Non-dialable callback numbers ................................................................................................................... 42 6.5 Quality of Service Information ......................................................................................................................... 42 6.5.1 LCS QoS Class ........................................................................................................................................... 42 6.5.1.1 Best Effort Class ................................................................................................................................... 43 6.5.1.2 Assured Class ........................................................................................................................................ 43 7 Signalling and Interfaces ........................................................................................................................ 43 7.1 LCS signalling between Access and Core Networks for GERAN and UTRAN access networks ................... 43 7.1.1 Core network Location Request.................................................................................................................. 43 7.1.2 Location Report .......................................................................................................................................... 43 7.1a LCS signalling between Access and Core Networks for E-UTRAN access networks ..................................... 44 7.1a.1 Core network Measurement Request .......................................................................................................... 44 7.1a.2 Location Measurement Report .................................................................................................................... 44 7.2 Um, Uu and Uu-LTE Interfaces ....................................................................................................................... 44 7.3 MAP Interfaces ................................................................................................................................................ 44 7.4 Lpp interface .................................................................................................................................................... 45 7.4.1 LCS Authorisation Request ........................................................................................................................ 45 7.4.2 LCS Authorisation Response ...................................................................................................................... 46 7.4.3 LCS Privacy Profile Update notification .................................................................................................... 47 7.4.4 LCS Privacy Profile Update notification ack .............................................................................................. 47 7.5 Lid interface ..................................................................................................................................................... 47 7.5.1 LCS Identity Request .................................................................................................................................. 47 7.5.2 LCS Identity Response ............................................................................................................................... 47 7.6 IMS related Interfaces ...................................................................................................................................... 47 7.6.1 Dh Interface ................................................................................................................................................ 47 7.6.2 Sh Interface ................................................................................................................................................. 47 7.6.3 Ml Interface ................................................................................................................................................ 47 7.7 SLg Interface .................................................................................................................................................... 47 7.8 SLs Interface .................................................................................................................................................... 48 7.9 SLh Interface .................................................................................................................................................... 48 8 General network location procedures ..................................................................................................... 48 8.1 State description for GMLC ............................................................................................................................. 48 8.1.1 GMLC states ............................................................................................................................................... 48 8.1.1.1 NULL State ........................................................................................................................................... 48 8.1.1.2 INTERROGATION State ..................................................................................................................... 48 8.1.1.3 LOCATION State ................................................................................................................................. 48 8.1.2 State functionality ....................................................................................................................................... 49 8.1.2.1 State Transitions .................................................................................................................................... 49 8.1.2.2 INTERROGATION Timer Function .................................................................................................... 49 ETSI 3GPP TS 23.271 version 9.2.0 Release 9 5 ETSI TS 123 271 V9.2.0 (2010-01) 8.1.2.3 LOCATION Timer Function ................................................................................................................ 50 8.2 State description for VMSC and MSC Server .................................................................................................. 50 8.2.1 VMSC and MSC Server States ................................................................................................................... 50 8.2.1.1 LCS IDLE State .................................................................................................................................... 50 8.2.1.2 LOCATION State ................................................................................................................................. 50 8.2.2 State Functionality ...................................................................................................................................... 50 8.2.2.1 State Transitions .................................................................................................................................... 50 8.2.2.2 LOCATION Timer Function ................................................................................................................ 51 8.3 LCS State description for SGSN ...................................................................................................................... 51 8.3.1 SGSN States................................................................................................................................................ 51 8.3.1.1 LCS IDLE State .................................................................................................................................... 51 8.3.1.2 LOCATION State ................................................................................................................................. 51 8.3.2 State Functionality ...................................................................................................................................... 51 8.3.2.1 State Transitions .................................................................................................................................... 51 8.3.2.2 LOCATION Timer Function ................................................................................................................ 52 8.4 Signalling connection for the Iu interface ........................................................................................................ 52 8.5 Signalling connection for the A-interface ........................................................................................................ 52 8.6 Gb interface mapping of target UE................................................................................................................... 52 8.7 LCS State description for MME ....................................................................................................................... 52 8.7.1 MME States ................................................................................................................................................ 52 8.7.1.1 LCS IDLE State .................................................................................................................................... 52 8.7.1.2 LOCATION State ................................................................................................................................. 52 8.7.2 State Functionality ...................................................................................................................................... 53 8.7.2.1 State Transitions .................................................................................................................................... 53 8.7.2.2 LOCATION Timer Function ................................................................................................................ 53 8.8 Signalling connection for the S1 interface ....................................................................................................... 53 9 General Network Positioning Procedures .............................................................................................. 53 9.1 Mobile Terminating Location Request ............................................................................................................. 54 9.1.1 Common MT-LR procedure in PS and CS domain .................................................................................... 55 9.1.1A Common MT-LR procedure in PS and CS domain for Emergency MT-LR .............................................. 59 9.1.1.1 LCS Authorisation request .................................................................................................................... 61 9.1.1.2 LCS Privacy Profile Update .................................................................................................................. 62 9.1.1.3 LCS identity request .............................................................................................................................. 62 9.1.2 Circuit Switched Mobile Terminating Location Request (CS-MT-LR) ..................................................... 63 9.1.2.1 Location Preparation Procedure ............................................................................................................ 64 9.1.2.2 Positioning Measurement Establishment Procedure ............................................................................. 65 9.1.2.3 Location Calculation and Release Procedure ........................................................................................ 65 9.1.3 CS-MT-LR without HLR Query ................................................................................................................. 65 9.1.4 CS-MT-LR and PS-MT-LR for a previously obtained location estimate ................................................... 66 9.1.4.1 Initial Location ...................................................................................................................................... 67 9.1.4.2 Current Location ................................................................................................................................... 67 9.1.4.3 Last known Location ............................................................................................................................. 67 9.1.4.4 Security and Privacy ............................................................................................................................. 67 9.1.4.5 Failing to locate the target UE............................................................................................................... 67 9.1.4.5.1 Target UE is "Not Reachable" ......................................................................................................... 67 9.1.4.5.2 Target UE is "Detached" ................................................................................................................. 68 9.1.4.5.3 Target UE is Reachable but Positioning Fails ................................................................................. 68 9.1.4.5.4 MSC Server or SGSN Target UE is "Purged" ................................................................................. 68 9.1.5 Network Induced Location Request (NI-LR) ............................................................................................. 69 9.1.5.1 Location Preparation Procedure ............................................................................................................ 69 9.1.5.2 Positioning Measurement Establishment Procedure ............................................................................. 70 9.1.5.3 Location Calculation and Release Procedure ........................................................................................ 70 9.1.5A NI-LR using Location Based Routing – applicable to North American Emergency Calls only ................. 71 9.1.5A.1 Location Preparation Procedure ............................................................................................................ 72 9.1.5A.2 Positioning Measurement Establishment Procedure ............................................................................. 72 9.1.5A.3 Location Calculation and Release Procedure ........................................................................................ 72 9.1.5A.4 Location Preparation Procedure ............................................................................................................ 72 9.1.5A.5 Positioning Measurement Establishment Procedure ............................................................................. 73 9.1.5A.6 Location Calculation and Release Procedure ........................................................................................ 73 9.1.6 Packet Switched Mobile Terminating Location Request (PS-MT-LR) ...................................................... 73 9.1.6.1 Location Preparation Procedure ............................................................................................................ 74 ETSI 3GPP TS 23.271 version 9.2.0 Release 9 6 ETSI TS 123 271 V9.2.0 (2010-01) 9.1.6.2 Positioning Measurement Establishment Procedure ............................................................................. 75 9.1.6.3 Location Calculation and Release Procedure ........................................................................................ 76 9.1.6A PS-MT-LR without HLR Query ................................................................................................................. 76 9.1.7 Packet Switched Network Induced Location Request (PS-NI-LR) ............................................................ 77 9.1.7.1 Positioning Measurement Establishment Procedure ............................................................................. 78 9.1.7.2 Location Calculation and Release Procedure ........................................................................................ 78 9.1.8 Mobile Terminating Deferred Location Request – UE available event ...................................................... 78 9.1.8.1 Deferred Location Request Procedure .................................................................................................. 79 9.1.8.2 Location Report Procedure ................................................................................................................... 80 9.1.8.3 Combined Periodical/Deferred Mobile Terminating Location Request with UE available event......... 81 9.1.8.4 Cancellation of a Deferred Location Request – UE available event ..................................................... 83 9.1.9 Deferred Location Request Procedure for the change of area event ........................................................... 84 9.1.9.1 Cancellation of a Deferred Location Request – Change of Area event ................................................. 87 9.1.10 Circuit Switched Post Positioning Notification and Verification Procedure .............................................. 88 9.1.11 Packet Switched Post Positioning Notification and Verification Procedure ............................................... 91 9.1.12 Deferred Location Request Procedure for the Periodic Location Event ..................................................... 92 9.1.12.1 Instigation of an MT-LR Request for Periodic Location ...................................................................... 92 9.1.12.2 Reporting of Periodic Location ............................................................................................................. 94 9.1.12.3 LCS Client cancellation of a Deferred Location Request – Periodic Location Event ........................... 97 9.1.12.4 UE cancellation of a Deferred Location Request – Periodic Location Event ....................................... 99 9.1.13 IW-MT-LR Procedure .............................................................................................................................. 101 9.1.14 IW-MT-LR Procedure without HLR/HSS or AAA Query ....................................................................... 102 9.1.15 EPC Mobile Terminating Location Request (EPC-MT-LR) .................................................................... 104 9.1.15.1 Location Preparation Procedure .......................................................................................................... 104 9.1.15.2 Positioning Measurement Establishment Procedure ........................................................................... 105 9.1.15.3 Location Calculation and Release Procedure ...................................................................................... 105 9.1.16 EPC-MT-LR without HLR Query ............................................................................................................ 106 9.1.17 EPC Network Induced Location Request (EPC-NI-LR)........................................................................... 107 9.1.17.1 Positioning Measurement Establishment Procedure ........................................................................... 107 9.1.17.2 Location Calculation and Release Procedure ...................................................................................... 108 9.1.18 EPC Post Positioning Notification and Verification Procedure ................................................................ 108 9.2 Mobile Originating Location Request ............................................................................................................ 110 9.2.1 Mobile Originating Location Request, Circuit Switched (CS-MO-LR) ................................................... 110 9.2.1.1 Location Preparation Procedure .......................................................................................................... 111 9.2.1.2 Positioning Measurement Establishment Procedure ........................................................................... 112 9.2.1.3 Location Calculation and Release Procedure ...................................................................................... 112 9.2.2 Mobile Originating Location Request, Packet Switched (PS-MO-LR) .................................................... 114 9.2.2.1 Location Preparation Procedure .......................................................................................................... 114 9.2.2.2 Positioning Measurement Establishment Procedure ........................................................................... 115 9.2.2.3 Location Calculation and Release Procedure ...................................................................................... 115 9.2.3 MO-LR Request for Periodic Location Transfer to a Third Party ............................................................ 116 9.2.4 MO-LR Request for Periodic Self Location ............................................................................................. 118 9.2.5 WLAN UE Originated Procedure in I-WLAN ......................................................................................... 120 9.2.6 Mobile Originating Location Request, EPC (EPC-MO-LR) .................................................................... 121 9.2.6.1 Location Preparation Procedure .......................................................................................................... 121 9.2.6.2 Positioning Measurement Establishment Procedure ........................................................................... 122 9.2.6.3 Location Calculation and Release Procedure ...................................................................................... 122 9.3 LCS signalling procedures specified in UTRAN and GERAN Stage 2 ......................................................... 123 9.3a LCS signalling procedures applicable to E-UTRAN ...................................................................................... 123 9.3a.1 UE Assisted and UE Based Positioning and Assistance Delivery ............................................................ 123 9.3a.2 Network Assisted and Network Based Positioning Procedure ................................................................. 124 9.4 Exception Procedures ..................................................................................................................................... 125 9.4.1 Procedures in the VMSC /MSC server ..................................................................................................... 125 9.4.2 Void .......................................................................................................................................................... 126 9.4.3 Procedures in the SGSN ........................................................................................................................... 126 9.4.3a Procedures in the MME ............................................................................................................................ 127 9.4.4 Void .......................................................................................................................................................... 127 9.4.5 Handover handling .................................................................................................................................... 127 9.4.5.1 VMSC /MSC server procedure for Inter-VMSC /MSC server Handover ........................................... 127 9.4.5.2 Handling of an ongoing handover while a request for positioning arrives .......................................... 127 9.4.5.3 Handover handling in Iu mode ............................................................................................................ 127 9.4.5.4 Handover of an IMS Emergency Call with EPS/GPRS Access .......................................................... 128 ETSI 3GPP TS 23.271 version 9.2.0 Release 9 7 ETSI TS 123 271 V9.2.0 (2010-01) 9.5 Privacy ............................................................................................................................................................ 132 9.5.1 Privacy Override Indicator (POI) .............................................................................................................. 132 9.5.2 Privacy Procedures ................................................................................................................................... 133 9.5.3 UE Privacy Options .................................................................................................................................. 133 9.5.3.1 Universal class .................................................................................................................................... 134 9.5.3.2 Call/Session related class .................................................................................................................... 134 9.5.3.2.1 Call/session-related class in the CS-domain .................................................................................. 135 9.5.3.2.2 Call/session-related class in the PS-domain .................................................................................. 135 9.5.3.2.3 Call/session-related class when LCS client not in SLPP ............................................................... 135 9.5.3.3 Call/Session-unrelated class ................................................................................................................ 136 9.5.3.3.1 Call/session-unrelated class when LCS client identities match ..................................................... 136 9.5.3.3.2 Call/session-unrelated class when LCS client identities do not match .......................................... 136 9.5.3.4 PLMN operator class........................................................................................................................... 137 9.5.3.5 Service type checking ......................................................................................................................... 137 9.5.3.6 Matching of LCS client identities ....................................................................................................... 137 9.5.4 Indicator of privacy check related action .................................................................................................. 138 9.6 Mobile Originating Location .......................................................................................................................... 138 9.7 CM Procedures ............................................................................................................................................... 139 9.7.1 Location request for a mobile in idle-mode .............................................................................................. 139 9.7.2 Location request for a mobile in dedicated-mode ..................................................................................... 139 9.8 Interworking with the IMS ............................................................................................................................. 139 9.8.1 Standard Location Request using a SIP-URI ............................................................................................ 139 9.8.2 Standard Location Request using a TEL-URL ......................................................................................... 141 9.8.3 Mobile Originated Location Requests in the IMS .................................................................................... 141 9.8.4 IMS Emergency Location Procedure ........................................................................................................ 141 10 Information storage .............................................................................................................................. 141 10.1 HLR and HSS ................................................................................................................................................. 141 10.1.1 LCS Data in the HLR/HSS for an UE Subscriber..................................................................................... 142 10.2 VLR/SGSN..................................................................................................................................................... 145 10.2a MME .............................................................................................................................................................. 145 10.3 GMLC ............................................................................................................................................................ 145 10.3.1 LCS Data in the GMLC for a LCS Client ................................................................................................. 145 10.3.2 LCS Data in the GMLC/PPR for a UE Subscriber ................................................................................... 147 10.4 Recovery and Restoration Procedures ............................................................................................................ 150 10.5 Interworking between network nodes in different releases ............................................................................ 150 10.5.1 LCS capability set ..................................................................................................................................... 150 10.5.2 Interworking between pre Rel-4 serving node and Rel-4 or later HLR/HSS ............................................ 151 10.5.3 Interworking between pre Rel-5 serving node and Rel-5 or later HLR/HSS ............................................ 151 10.5.4 Interworking between pre Rel-6 network nodes and Rel-6 or later HLR/HSS ......................................... 151 10.5.4.1 Rel-6 or later HLR/HSS with pre Rel-6 serving node ......................................................................... 151 10.6 LIMS-IWF ...................................................................................................................................................... 151 11 Operational Aspects ............................................................................................................................. 151 11.1 Charging ......................................................................................................................................................... 151 11.2 Charging Information Collected by the Visited PLMN.................................................................................. 152 Annex A (normative): Privacy Class selection rule in serving node .............................................. 153 A.1 Interrelation among privacy settings .................................................................................................... 153 A.2 Privacy class selection rule for pre Rel-6 mechanism .......................................................................... 153 A.3 Privacy related action selection rule for Rel-6 and later ...................................................................... 154 Annex B (normative): Presence of LCS client ID Components in MT-LR .................................. 156 Annex C (Informative): Pseudo external ID ....................................................................................... 157 Annex D (normative): including Requestor identity to LCS client name ..................................... 161 Annex E (Informative): Handling of pseudonyms in location services ............................................ 162 Annex F (Informative): Mechanism for performing Change of Area Event Detection ................. 165 ETSI 3GPP TS 23.271 version 9.2.0 Release 9 8 ETSI TS 123 271 V9.2.0 (2010-01) F.1 (U)SIM Application Toolkit (USAT) Based Solution ......................................................................... 165 Annex G (informative): Change history ............................................................................................. 167 History ............................................................................................................................................................ 169 ETSI 3GPP TS 23.271 version 9.2.0 Release 9 9 ETSI TS 123 271 V9.2.0 (2010-01) Foreword This Technical Specification (TS) has been produced by the 3rd Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI