Table of Contents

Intellectual Property Rights
Foreword
Foreword
1 Scope
2 References
3 Definitions, abbreviations and symbols
   3.1 Definitions
   3.2 Abbreviations
   3.3 Symbols
4 Main concepts
   4.1 Assumptions
   4.2 Timing Advance (TA)
   4.3 Time of Arrival (TOA) positioning mechanism
   4.4 Enhanced Observed Time Difference (E-OTD) positioning
        mechanism
   4.5 Global Positioning System (GPS) positioning mechanism
5 General LCS architecture
   5.1 LCS access interfaces and reference points
   5.2 LCS Functional diagram
   5.3 LCS CLIENT
   5.4 LCS Server
   5.5 Information Flows between Client and Server
   5.6 Logical architecture
   5.7 Embedded Architecture
   5.8 Assignment of functions to general logical architecture
6 Signalling Protocols and Interfaces
   6.1 Generic Signalling Model for LCS
   6.2 Signalling between an SMLC, MSC and BSC
   6.3 SMLC Signaling to a Target MS
   6.4 SMLC Signalling to a Type A LMU
   6.5 SMLC signaling to a Type B LMU
   6.6 SMLC Signalling to a peer SMLC
7 General Network Location Procedures
   7.1 State Description for the GMLC
   7.2 State Description for the VMSC
   7.3 State Description for the BSC
   7.4 State Description for the SMLC
   7.5 Usage of SCCP Connections on the Ls and Lb interfaces
   7.6 General Network Positioning Procedures
   7.7 Common Procedures to Support Positioning
   7.8 Common Procedures to Support Access to an LMU
   7.9 Common Control Procedures for LMUs
   7.10 Common Procedures supporting Interaction between Peer SMLCs
   7.11 Exception Procedures
   7.12 Privacy
   7.13 Mobile Originating Location
   7.14 CM Procedures
   7.15 Radio Interface Timing Procedures
8 TA based Positioning
   8.1 Definition of TA states
   8.2 TA Positioning Procedure for an NSS based SMLC
   8.3 TA Positioning Procedure for a BSS based SMLC
   8.4 Unsuccessful TA positioning procedure in BSC
9 TOA based positioning
   9.1 TOA procedures
10 E-OTD and GPS Positioning Procedures
   10.1 General Procedures
   10.2 Positioning for BSS based SMLC
   10.3 Positioning for NSS based SMLC
   10.4 Assistance Data Delivery from BSS based SMLC
   10.5 Assistance Data Delivery from NSS based SMLC
   10.6 Error Handling for E-OTD and GPS
   10.7 Broadcast OF ASSISTANCE DATA
11 Position calculation functionality
   11.1 TA
   11.2 Time Of Arrival (TOA) Positioning mechanism
   11.3 Enhanced Observed Time Difference (E-OTD)
   11.4 Global Positioning System (GPS) positioning mechanism
12 Information storage
   12.1 HLR
   12.2 VLR
   12.3 GMLC
   12.4 SMLC
   12.5 Recovery and Restoration Procedures
13 Operational Aspects
Annex A (Informative): Examples of MT-LR
      A.1 PLMN Roles
      A.2 Non-Call Related MT-LR
      A.3 Call Related MT-LR
Annex B (Informative): Description of TOA
Annex C (informative): Description of E-OTD
      C.1 Basic Concepts
      C.2 Position Calculation Types
      C.3 Implementation Issues
Annex D (informative): Description Of Assisted GPS
      D.1 Assisted-GPS
      D.2 MS-Assisted GPS
      D.3 MS-Based GPS
      D.4 References
Annex E (informative): Privacy class selection rule
Annex F (informative): Change History
History

Abstract

Describes the stage-2 service description for the LoCation Services (LCS) feature on GSM, which provides the mechanisms to support mobile location services of operators, which are not covered by standardized GSM services.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	3GPP SA 2