3GPP TR 23.842 V11.0.0 (2011-12) Technical Report

3rd Generation Partnership Project;Technical Specification Group Services and System Aspects;

Study on network provided location information to the IP Multimedia Subsystem (IMS)

(Release 11)

The present document has been developed within the 3rd Generation Partnership Project (3GPP TM) and may be further elaborated for the purposes of 3GPP. The present document has not been subject to any approval process by the 3GPP Organizational Partners and shall not be implemented. This Report is provided for future development work within 3GPP only. The Organizational Partners accept no liability for any use of this Specification. Specifications and Reports for implementation of the 3GPP TM system should be obtained via the 3GPP Organizational Partners' Publications Offices.

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3GPP TR 23.842 V11.0.0 (2011-12) 2Release 11

Keywords 3GPP, Architecture, IMS, Location

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2011, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC).

All rights reserved. UMTS is a Trade Mark of ETSI registered for the benefit of its members 3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners LTE is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners GSM and the GSM logo are registered and owned by the GSM Association

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Contents Foreword ...................................................................................................................................................... 5 1 Scope .................................................................................................................................................. 6 2 References .......................................................................................................................................... 6 3 Definitions and abbreviations .............................................................................................................. 7 3.1 Definitions ................................................................................................................................................... 7 3.2 Abbreviations............................................................................................................................................... 7 4 Scenarios for Network Provided Location Information Provision ........................................................ 7 4.1 Lawful interception ...................................................................................................................................... 7 4.2 Charging ...................................................................................................................................................... 7 4.3 IMS Emergency Calls Routing ..................................................................................................................... 8 4.4 Retention of Location Information Data ........................................................................................................ 8 4.5 Special Call Routing for Localised Services .................................................................................................. 8 4.6 Location-based service triggering ................................................................................................................. 8 5 Architecture Requirements .................................................................................................................. 9 5.1 General ........................................................................................................................................................ 9 5.2 High Level Requirements ............................................................................................................................. 9 5.3 Location Characteristics Requirements ......................................................................................................... 9 5.4 Overview of IMS Functional Entities Requiring Location ........................................................................... 10 6 Architecture Alternatives .................................................................................................................. 11 6.1 HSS based NPLI retrieval based on existing mechanisms ............................................................................ 11 6.1.0 General ................................................................................................................................................. 11 6.1.1 NPLI provision for MT call based on HSS interrogation ........................................................................ 12 6.1.2 NPLI provision during IMS emergency registration ............................................................................... 13 6.2 Enhanced PS domain location reporting ...................................................................................................... 14 6.2.1 Signalling Flow for the Enhanced PS Domain Location Reporting ......................................................... 15 6.2.1a Using GTP-U Messages for Enhanced PS Domain Location Reporting .................................................. 16 6.3 LCS based NPLI provision from MME to GMLC ....................................................................................... 17 6.3.1 Overview .............................................................................................................................................. 17 6.3.2 Procedure between GMLC and Serving Nodes ...................................................................................... 18 6.3.3 Pre-establish connection between GMLC and serving node ................................................................... 19 6.3.4 Procedures for localized call routing...................................................................................................... 20 6.4 NPLI provision using EPS and PCC Framework ......................................................................................... 23 6.4.0 General ................................................................................................................................................. 23 6.4.1 NPLI provision at session establishment ................................................................................................ 23 6.4.2 NPLI provision at session release .......................................................................................................... 25 6.4.3 NPLI provision at session modification ................................................................................................. 27 6.4.4 Bearer Independent NPLI Fetch by P-CSCF .......................................................................................... 29 6.4.5 NPLI provision during IMS emergency call .......................................................................................... 30 6.5 Void .......................................................................................................................................................... 30 6.6 Correlation of IMS and IP-CAN CDRs ....................................................................................................... 30 6.6.1 General ................................................................................................................................................. 30 6.6.2 IP-CAN records all cell changes ............................................................................................................ 31 6.6.3 IP-CAN records serving Cell-ID/CSGID for limited conditions ............................................................. 31 6.7 Void .......................................................................................................................................................... 31 6.8 NPLI via GTP-U request for non-Session based IMS .................................................................................. 31 6.8.1 Using GTP S5/S8 ................................................................................................................................. 31 6.8.2 Using PMIP based S5/S8 ...................................................................................................................... 32 6.9 NPLI retrieval based on Intelligent Network exchange ................................................................................ 32 6.9.1 ICS Mg origination ............................................................................................................................... 32 6.10 2-phase solution ......................................................................................................................................... 32 6.10.1 Overview .............................................................................................................................................. 32 6.10.2 Call flows ............................................................................................................................................. 33 6.10.2.1 Originating session establishment .................................................................................................... 33

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6.10.2.2 Terminating session establishment ......