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					Location Service (LCS)
         Speaker: T.C. Huang
          Advisor: S.R. Yang
                    Date: 8/8



                    Wireless and Mobile Networking Laboratory
                    Computer Science Dep. NTHU
Outline
   Overview
   LCS Architecture in 3GPP
   OMA Mobile Location Protocol
   An Application
Location-based Applications
   For mobile user
       Navigation or real-time traffic
       Emergency assistance
       Travel services
   For corporations, ex: FedEx, UPS
       Dispatch and delivery route optimization
       Security and theft control
   Etc.
LCS Relation




                               OMA
     UE




          3GPP
                           GMLC




                 GMLC: Gateway Mobile Location Center
Outline
   Overview
   LCS Architecture in 3GPP
   OMA Mobile Location Protocol
   An Application
LCS Architecture in 3GPP
   GMLC (Gateway Mobile Location Center)
       Request routing information from the HLR or HSS
       Send position requests to either MSC or SGSN
        and receives final location estimates
   LIMS-IWF (Location IMS – Interworking
    Function)
       Provide routing of LCS service requests and
        response based on the target UE’s SIP-URI
       Mapping of SIP-URI to MSISDN
LCS Architecture in 3GPP(contd.)
   HSS (Home subscriber server)
       Contains LCS subscription data and routing
        information)
   PPR (Privacy Profile Register)
       Privacy check
   PMD (Pseudonym Mediation Device)
       Maps or decrypts the pseudonym into the
        corresponding verinym
LCS Architecture in 3GPP(contd.)


               GERAN    A     2G-                                          gsmSCF         * Note 2
                                                  PPR
                              MSC                *Note 3
                                                                                         Proprietary
                        Gb     2G-          Lg
          Um                                           Lpp            Lc        OSA SCS
                              SGSN
UE                                                                                        OSA API
                                       Lg                              Proprietary
                         Iu                      GMLC                                  External LCS
                   Iu                                                                     Client
                                       Lg                             Le
     Uu                        3G-                               Le
               UTRAN                                                        LIMS-
                        Iu    SGSN                         Lid
                                            Lg    Lh                         IWF
                                                                            * Note 5
                        Iu    MSC
                              server                                  PMD
                                                 HSS
                                                 *Note 1          *Note 4
Outline
   Overview
   LCS Architecture in 3GPP
   OMA Mobile Location Protocol
   An Application
What is Mobile Location Protocol?
   Application-level protocol
   Getting the position of mobile stations
   The interface between a Location Server
    (GMLC) and a Location services (LCS) client
   Using XML

   LCS defined in 3GPP TS23.271
Where is MLP? (change)




                         OMA
     UE




          3GPP
                    GMLC
Types of Mobile Location
   Standard Location Immediate Service
   Emergency Location Immediate Service
   Emergency Location Reporting Service
   Triggered Location Reporting Service
Standard/Emergency Location
Immediate Service
   This is a standard service for requesting the
    location of one or more Mobile Subscribers.




              standard location immediate request


              standard location immediate answer


      LCS client                                    GMLC
Emergency Location reporting
Service
   If a user initiates or releases an emergency
    call, an emergency location report is
    generated.




              emergency location report


      LCS client                          GMLC
Trigger Location Reporting Service
   This service is used when an application
    wants the position of several Mss to be
    tracked.


              trigger location reporting request
              trigger location reporting answer
              trigger location report
              trigger location report
              trigger location reporting stop request
              trigger location reporting stop answer

      LCS client                                   GMLC
MLP example
<?xml version="1.0" ?>
<!DOCTYPE svc_init SYSTEM "MLP_SVC_INIT_310.DTD">
<svc_init ver="3.1.0">
<hdr ver="3.0.0">
...
</hdr>
<slir ver="3.0.0">
...
</slir>
</svc_init>
Outline
   Overview
   LCS Architecture in 3GPP
   OMA Mobile Location Protocol
   An Application
An Application


                      GMLC




         LCS




               USER          CAR
Scenario


                                  GMLC



                        Report
           LCS



            MMS




                 USER            CAR
Message Flow
USER   CAR                                            GMLC

               Push Request


                        MMSC         LCS


                                           Push Location




                                               ………
                                           Push Location


                          Send MMS

             Send MMS

				
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posted:3/29/2013
language:English
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