WO2011035648A1 - Procédé et système pour réaliser localisation d'urgence - Google Patents

Procédé et système pour réaliser localisation d'urgence Download PDF

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Publication number
WO2011035648A1
WO2011035648A1 PCT/CN2010/075528 CN2010075528W WO2011035648A1 WO 2011035648 A1 WO2011035648 A1 WO 2011035648A1 CN 2010075528 W CN2010075528 W CN 2010075528W WO 2011035648 A1 WO2011035648 A1 WO 2011035648A1
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Prior art keywords
slp
supl
emergency
message
positioning
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PCT/CN2010/075528
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English (en)
Chinese (zh)
Inventor
李志军
李会
Original Assignee
中兴通讯股份有限公司
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Publication of WO2011035648A1 publication Critical patent/WO2011035648A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/20—Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections

Definitions

  • the present invention relates to emergency call technology, and more particularly to an emergency positioning implementation method and system. Background technique
  • IMS IP Multimedia Core Subsystem
  • SIP Session Initiation Protocol
  • SIP specifies that communication is independent of access, and has multiple media service control functions and bearer separation capabilities, call and session separation capabilities, application and service separation capabilities, service and network separation capabilities, and mobile network and Internet service convergence capabilities. Wait.
  • GPRS General Packet Radio Service
  • SAE System Architecture Evolution
  • location services are indispensable.
  • the emergency call needs to be routed to the appropriate police station according to the location of the UE.
  • the police station needs to know the current location information of the UE. .
  • FIG. 1 is a schematic diagram of a network architecture of an emergency call for a UE to access an IMS through an SAE.
  • the solid line indicates signaling, and the dotted line indicates the user's IP channel.
  • the network element including the SAE network part and the location location service part are included.
  • the network element of the SAE network part is used to provide the underlying bearer management and mobility management, including an enhanced radio base station (eNodeB), a mobility management entity (MME, Mobility Management Entity), and user plane data routing processing (SAE). GW).
  • the eNodeB is the control device for the main air interface resources of the next generation of radio access networks, which can provide higher uplink and downlink rates, lower transmission delays and more reliable wireless transmission.
  • the MME is responsible for managing and storing the context of the user equipment (UE, User Equipment), such as the UE/user identity, mobility management status, and user security parameters, and assigns a temporary identifier to the user. When the UE is camped on the tracking area or the network, Responsible for authenticating the user.
  • the SAE gateway (GW, Gate Way) (user plane function entity) can be divided into two types: a service gateway (S-GW, Serving GW) and a packet data network gateway (PDN GW, also referred to as P-GW).
  • S-GW service gateway
  • PDN GW packet data network gateway
  • the S-GW is a mobility anchor between the SAE system and the legacy 3GPP system and an evolved universal mobile communication system terrestrial radio access network (E-UTRAN, which is the border gateway of the SAE and Packet Data Network (PDN), responsible for PDN access, forwarding data between SAE and PDN.
  • E-UTRAN evolved universal mobile communication system terrestrial radio access network
  • PDN Packet Data Network
  • the core network element of the SUPL part of the user plane is the user plane location platform (SLP, SUPL Location Platform).
  • the SUPL-capable user terminal is called SET (SUPL Enabled Terminal), and is actually a UE that integrates a positioning module (such as A-GPS).
  • the IMS emergency call part includes: a Home Subscriber Server (HSS), an Emergency Call Session Control Function (E-CSCF), a Location Require Function (LRF), and a public security connection. Entry point (PSAP, Public Safety Access Point).
  • HSS Home Subscriber Server
  • E-CSCF Emergency Call Session Control Function
  • LRF Location Require Function
  • PSAP Public Safety Access Point
  • the HSS management user's subscription data is located in the home network.
  • E-CSCF The core network element that controls the emergency session process is located on the visited network.
  • the PSAP is actually a police station.
  • the LRF is a logical functional entity that provides location information of the UE for the E-CSCF, PSAP, etc.
  • the LRF can be deployed independently or in other location servers, such as integrated into the SLP.
  • a SUPL-capable UE is configured with an SLP of the home network, that is, an H-SLP.
  • an H-SLP When the UE is not roaming, it can perform positioning by interacting with the H-SLP.
  • the UE needs to cooperate with the H-SLP and the SLP of the visited network, that is, the V-SLP to complete the positioning.
  • the emergency call due to the particularity of the emergency call, it must be processed in the visited network, and the processing logic for the emergency call may be different from the general call. Therefore, there is an SLP that provides location service for emergency calls, that is, an emergency call SLP (E- SLP, Emergency SLP) overwhelm
  • E- SLP Emergency SLP
  • the location for the emergency call is usually initiated by the network side, that is, Network Initiated Location Request (NI-LR).
  • NI-LR Network Initiated Location Request
  • the E-CSCF requests the location information of the UE from the LRF after receiving the emergency call request of the UE, and the LRF initiates a location query to the emergency SLP (E-SLP), thereby triggering the E-SLP to initiate the network side positioning process ( Ie NI-LR).
  • E-SLP emergency SLP
  • the UE may also initiate an emergency location procedure to the E-SLP, that is, the UE initiates an emergency location procedure instead of the E-SLP, FIG. 3
  • the UE initiates a positioning process (MO-LR) to implement an emergency positioning process.
  • MO-LR positioning process
  • Step 300 The UE is attached to the IP access network, and the UE has the SUPL capability, that is, the SET.
  • the IP access network generally refers to an SAE network including important network element entities such as eNodeB and MME.
  • the UE attaches to the IP access network, it is assigned an appropriate IP address, and obtains necessary network information such as a Dynamic Host Setup Protocol (DHCP) server address and a Domain Name Server (DNS) address from the network.
  • DHCP Dynamic Host Setup Protocol
  • DNS Domain Name Server
  • Step 301 The UE obtains an address of the SLP of the visited network from the network.
  • the UE can obtain the address of the SLP located in the visited network by constructing a suitable domain name and requesting DNS server resolution.
  • the UE may construct a domain name of the form: "E-SLRXXX.XXX.XXX” or a similar structure, where XXX may be any valid
  • the string if it is a 3GPP network, can be configured as "E-SLP.MNC.MCC.PUB.3GPPNETWORK.ORG, where MNC is the network number of the visited network accessed by the UE, and the MCC is accessed by the UE.
  • the country number of the network, 3GPPNETWORK indicates that the UE is currently accessing the 3GPP network.
  • the UE accesses the EPS network, is assigned an IP address, and obtains an appropriate SLP address, and has the condition for initiating an emergency call.
  • Step 302 The UE initiates an emergency call, that is, initiates a SIP INVITE, which carries an emergency identifier.
  • the emergency call request is routed to the E-CSCF.
  • Step 303 After the UE initiates the emergency call request, the UE sends a SUPL START message (SUPL START) to the SLP, which carries the emergency identifier.
  • SUPL START SUPL START
  • Step 304 After receiving the SUPL START message from the UE, the SLP returns a SUPL RESPONSE message to the UE.
  • Step 305 The UE initiates a SUPL positioning initialization message (SUPL POS INIT) to the SLP.
  • Step 307 After the UE initiates an emergency call request in step 302, when the E-CSCF receives
  • the location query request is sent to the LRF.
  • the location query request is used to request the LRF to return the location information of the UE, and determine the appropriate PSAP according to the location of the UE.
  • Step 308 The LRF queries the location information of the UE from the SLP, and determines an appropriate PSAP according to the location information, and returns the location information of the UE carrying the location information and the PSAP information to the E-CSCF. Request a response.
  • Step 309 After obtaining the PSAP, the E-CSCF routes the emergency call request initiated by the UE to the PSAP.
  • Step 310 In the subsequent process, an emergency call is established between the PSAP and the UE.
  • the UE finds an SLP dedicated to an emergency call, that is, an E-SLP, the above procedure is normal. However, if the UE obtains a normal SLP for emergency positioning, such as when the visited network is a V-SLP and the home network is an H-SLP, then since the emergency location must be provided by the E-SLP, the Figure 3 shows The positioning process is not completed properly.
  • the network returns the SLP address for the common location to the UE, or the UE discovers the SLP for common positioning by constructing the domain name, then The UE wants to initiate an emergency location procedure for the E-SLP for emergency positioning will not be implemented normally.
  • the main object of the present invention is to provide an emergency positioning implementation method and system, which can ensure the normal implementation of emergency positioning, thereby ensuring a successful emergency call.
  • An emergency positioning implementation method includes:
  • the UE After the UE initiates the emergency call, the UE initiates SUPL emergency positioning to the user plane positioning platform SLP;
  • the SLP transfers the SUPL emergency location to the location by the emergency user plane positioning platform E-SLP.
  • the SLP shifting the SUPL emergency location to the emergency user plane positioning platform E-SLP implementation includes: after receiving the SUPL initiation message initiated by the UE, the SLP determines that the location should be E-based according to the emergency identifier carried in the SUPL start message. SLP processing;
  • the SLP sends a SUPL End message to the UE, in which the SLP carries information indicating that the UE should initiate an emergency location request to the E-SLP; the UE receives the SUPL node sent by the SLP. After the bundle message, the address of the E-SLP is obtained, and the SUPL start message carrying the emergency identifier is sent to the E-SLP.
  • the information indicating that the UE should initiate an emergency location request to the E-SLP includes an indication, or an address of the E-SLP.
  • the SLP shifting the SUPL emergency location to the emergency user plane positioning platform E-SLP implementation includes: after receiving the SUPL initiation message initiated by the UE, the SLP determines that the location should be E-based according to the emergency identifier carried in the SUPL start message. SLP processing;
  • the SLP forwards the received SUPL start message to the E-SLP, and all subsequent SUPL messages of the UE are forwarded to the E-SLP via the SLP, and the response and processing result returned by the E-SLP are forwarded via the SLP.
  • the SLP forwards the received SUPL start message to the E-SLP, and all subsequent SUPL messages of the UE are forwarded to the E-SLP via the SLP, and the response and processing result returned by the E-SLP are forwarded via the SLP.
  • the SLP shifting the SUPL emergency location to the emergency user plane positioning platform E-SLP implementation includes: after receiving the SUPL initiation message initiated by the UE, the SLP determines that the location should be E-based according to the emergency identifier carried in the SUPL start message. SLP processing;
  • the SLP forwards the received SUPL start message to the E-SLP, and all subsequent SUPL messages of the UE have the E-SLP directly interacting with the UE.
  • the SLP shifting the SUPL emergency location to the emergency user plane positioning platform E-SLP implementation includes: after receiving the SUPL initiation message initiated by the UE, the SLP determines that the location should be E-based according to the emergency identifier carried in the SUPL start message. SLP processing;
  • the SLP sends a SUPL end message to the UE, and the SLP notifies the E-SLP to initiate emergency location to the UE; the E-SLP initiates a SUPL initialization message to the UE to initiate emergency location.
  • the SUPL end message includes information indicating that the location request initiated by the UE has notified the E-SLP; the SLP notifies the E-SLP to initiate emergency location to the UE as:
  • the SLP sends a notification message to the E-SLP, informing the E-SLP that the UE initiates an emergency location procedure; after receiving the notification message from the SLP, the E-SLP initiates a SUPL initialization message to the UE.
  • the notification message carries the complete SUPL start message; or
  • the notification message includes information that the E-SLP actively initiates the positioning process.
  • An emergency positioning implementation system mainly includes a UE, a user plane positioning platform SLP, and an emergency SLP E-SLP, wherein
  • the UE is configured to initiate SUPL emergency positioning to the SLP after the emergency call is initiated;
  • SLP used to transfer SUPL emergency positioning to positioning by E-SLP;
  • E-SLP used to interact with the UE to complete emergency positioning.
  • the SLP is specifically configured to: the SLP receives a SUPL start message initiated by the UE, and if the SUPL start message received by the SLP from the UE carries an emergency identifier, sends a SUPL end message to the UE;
  • the UE is specifically configured to: after receiving the SUPL end message sent by the SLP, obtain the address of the E-SLP, and send a SUPL start message to the E-SLP, where the emergency identifier is carried.
  • the SLP is specifically configured to: the SLP receives the SUPL start message initiated by the UE, and if the SUPL start message received by the SLP from the UE carries the emergency identifier, forwards the received SUPL start message to the E-SLP, and forwards the UE and the SUPL message exchanged between E-SLPs;
  • the UE is specifically configured to send a SUPL message to the E-SLP via the SLP;
  • the E-SLP is specifically configured to return a response or a processing result to the UE via the SLP.
  • the SLP is specifically configured to: the SLP receives the SUPL start message initiated by the UE, and if the SLP receives the SUPL start message from the UE, the SUPL start message is forwarded to the E-SLP;
  • the UE is specifically configured to: send a SUPL message to the E-SLP;
  • the E-SLP is specifically configured to return a response or a processing result to the UE.
  • the SLP is specifically configured to: receive, by the SLP, a SUPL start message initiated by the UE, if the SUPL start message received by the SLP from the UE carries an emergency identifier, send a SUPL end message to the UE, and notify the E-SLP to initiate an emergency to the UE.
  • the E-SLP is specifically configured to: after receiving the notification message sent by the SLP, initiate a SUPL initialization to the UE. Message.
  • the method of the present invention includes: after the UE initiates an emergency call, initiates SUPL emergency positioning to the SLP; and the SLP transfers the SUPL emergency location to the E-SLP implementation. Since the SLP for emergency location service is E-SLP, the normal implementation of the emergency location process is guaranteed, thus ensuring a successful emergency call. DRAWINGS
  • FIG. 1 is a schematic diagram of a network architecture of an emergency call in which a UE accesses an IMS through a SAE;
  • FIG. 2 is a schematic diagram of interaction between a UE having a SUPL capability and a positioning platform in a roaming scenario;
  • FIG. 3 is a flow chart of the UE performing a positioning process (MO-LR) to implement emergency positioning when the UE initiates an emergency call;
  • MO-LR positioning process
  • FIG. 4 is a flow chart of a method for implementing emergency positioning according to the present invention.
  • FIG. 5 is a flowchart of a first embodiment of implementing emergency positioning according to the present invention.
  • FIG. 6 is a flow chart of a second embodiment of implementing emergency positioning according to the present invention.
  • FIG. 7 is a flow chart of a third embodiment of implementing emergency positioning according to the present invention.
  • Figure 8 is a flow chart of a fourth embodiment of the present invention for implementing emergency positioning. detailed description
  • FIG. 4 is a flowchart of a method for implementing emergency positioning according to the present invention. As shown in FIG. 4, the method includes the following steps: Step 400: After the UE initiates an emergency call, initiate a SUPL emergency location to the SLP.
  • This step generally includes: The UE is attached to the IP access network and is assigned an IP address. And, assuming that the UE has found the address of the SLP, the SLP is used to serve normal positioning. If the UE is on the visited network, the V-SLP is found. If the UE is in the home network, the H-SLP is found. After the UE accesses the IP access network, when an emergency call needs to be initiated, the UE initiates an emergency to the upper IMS service layer. The call, the emergency call is routed to the E-CSCF; the UE initiates a SUPL START message carrying the emergency identity (SUPL START) to the SLP.
  • SUPL START emergency identity
  • Step 401 The SLP transfers the SUPL emergency location to the location implemented by the E-SLP.
  • the SLP After receiving the SUPL START message initiated by the UE, the SLP determines that the location should be processed by the E-SLP because the SUPL START message carries the emergency identifier, and the SLP transfers the SUPL emergency location to the E-SLP.
  • the handover method may be:
  • the SLP sends a SUPL End message (SUPL END) to the UE.
  • SUPL END message the SLP carries an indication, or an address of the E-SLP, to inform the UE that an emergency location request should be initiated to the E-SLP; after receiving the SUPL END message sent by the SLP, the UE obtains the address of the E-SLP, The E-SLP sends a SUPL start message, which carries an emergency identifier, thereby implementing emergency positioning through the E-SLP.
  • the SLP forwards the received SUPL START message to the E-SLP, and all subsequent SUPL messages of the UE are forwarded to the E-SLP via the SLP, and the response and processing result returned by the E-SLP are forwarded to the UE via the SLP.
  • the SLP performs full proxy and achieves emergency positioning through the E-SLP.
  • the SLP forwards the received SUPL START message to the E-SLP, and all subsequent SUPL messages of the UE are directly interacted with by the E-SLP, so that the SLP performs initial proxy and implements emergency location through the E-SLP.
  • the SLP sends a SUPL End message (SUPL END) to the UE.
  • SUPL END message an appropriate description information may be further included, indicating that the positioning request initiated by the UE has notified the E-SLP; at the same time, the SLP may simultaneously send a notification message to the E-SLP, informing the UE that the emergency positioning procedure is to be initiated, and the SLP may Include the complete SUPL START message in the notification message E-SLP. Or, in the notification message, the E-SLP actively includes some necessary information such as the IP address of the UE. Subsequently, after receiving the notification message sent by the SLP, the E-SLP initiates a SUPL INIT (SUPL INIT) to the UE, thereby implementing emergency positioning through the E-SLP.
  • SUPL INIT SUPL INIT
  • the SLP serving the emergency location is an E-SLP, the normal implementation of the emergency positioning process is ensured, thereby ensuring a successful emergency call.
  • An emergency positioning implementation system is further provided for the method of the present invention, which mainly includes a UE, an SLP, and an E-SLP, where
  • the UE is configured to initiate SUPL emergency positioning to the SLP after the emergency call is initiated.
  • SLP used to transfer SUPL emergency positioning to positioning by E-SLP.
  • E-SLP used to interact with the UE to complete emergency positioning.
  • the SLP is specifically configured to: the SLP receives the SUPL START message initiated by the UE, determines that the positioning should be processed by the E-SLP, and sends a SUPL end message (SUPL END) to the UE.
  • SUPL START message initiated by the UE
  • E-SLP determines that the positioning should be processed by the E-SLP
  • SUPL END SUPL end message
  • the UE is specifically configured to: after receiving the SUPL END message sent by the SLP, obtain the address of the E-SLP, and send a SUPL start message to the E-SLP, where the emergency identifier is carried.
  • the SLP is specifically configured to: the SLP receives the SUPL START message initiated by the UE, and if the SUPL start message received by the SLP from the UE carries the emergency identifier, forwards the received SUPL START message to the E-SLP, and forwards the UE and the E- SUPL message for interaction between SLPs.
  • the UE is specifically configured to send a SUPL message to the E-SLP via the SLP.
  • the E-SLP is specifically used to return a response or a processing result to the UE via the SLP.
  • the SLP is specifically used by the SLP to receive the SUPL START message initiated by the UE. If the SUPL start message received by the SLP from the UE carries the emergency identifier, the received SUPL START message is forwarded to the E-SLP.
  • the UE is specifically configured to send a SUPL message to the E-SLP.
  • the E-SLP is specifically used to return a response or a processing result to the UE.
  • the SLP is specifically configured to: the SLP receives the SUPL START message initiated by the UE, and if the SUPL start message received by the SLP from the UE carries the emergency identifier, sends a SUPL END message (SUPL END) to the UE, and notifies the E-SLP to the UE. Start emergency positioning.
  • the E-SLP is specifically configured to: after receiving the notification message sent by the SLP, initiate a SUPL initialization message (SUPL INIT) to the UE.
  • SUPL initialization message SUPL INIT
  • FIG. 5 is a flowchart of the first embodiment of the present invention for implementing emergency positioning.
  • the SLP rejects the SUPL start message initiated by the UE, and informs the UE that A location request is initiated to the E-SLP.
  • the method specifically includes: Step 500: The UE is attached to the IP access network, and is assigned an IP address. And, the UE has found the address of the SLP, which is used to serve normal positioning.
  • the discovered SLP is a V-SLP, and if the UE is at the home network, then the discovered SLP is an H-SLP.
  • Step 501 After the UE accesses the IP access network, when an emergency call needs to be initiated, an emergency call is initiated to the upper IMS service layer, and the emergency call is routed to the E-CSCF.
  • Step 502 The UE initiates a SUPL START message (SUPL START) to the SLP, where the SUPLSTART message carries an emergency identifier ( Emc ).
  • SUPL START SUPL START message
  • Emc emergency identifier
  • Step 503 After receiving the SUPL START message initiated by the UE, the SLP finds that it should be
  • the SLP sends a SUPL End message (SUPL END) to the UE.
  • SUPL End message SUPL End
  • the SUPL END message carries an E-SLP Redirect indication, or an E-SLP address, as long as the UE is informed that an emergency location request should be sent to the designated E-SLP.
  • Step 504 After receiving the SUPL END message sent by the SLP, the UE obtains the location of the E-SLP. Address, sending a SUPL START message to the E-SLP, which carries an emergency identifier.
  • Step 505 After receiving the SUPL START message sent by the UE, the E-SLP exchanges a subsequent SUPL positioning message, establishes a SUPL connection with the UE, and obtains location information of the UE.
  • the IMS service layer determines an appropriate PSAP according to the location information to complete the establishment of the emergency call.
  • FIG. 6 is a flowchart of a second embodiment of the present invention.
  • the SLP proxyes the location request of the UE to the E-SLP. As shown in 6, it specifically includes:
  • Step 600 The UE attaches to the IP access network and is assigned an IP address. And, the UE has found the address of the SLP, which is used to serve normal positioning.
  • the discovered SLP is a V-SLP, and if the UE is at the home network, then the discovered SLP is an H-SLP.
  • Step 601 After the UE accesses the IP access network, when an emergency call needs to be initiated, an emergency call is initiated to the upper IMS service layer, and the emergency call is routed to the E-CSCF.
  • Step 602 The UE initiates a SUPL START message to the SLP, and carries an emergency identifier in the SUPL START message.
  • Step 603 After receiving the SUPL START message initiated by the UE, the SLP finds that it should be processed by the E-SLP, and the SLP forwards the received SUPL START message to the E-SLP.
  • Step 604 After receiving the SUPL START message forwarded by the SLP, the E-SLP returns a SUPL RESPONSE message to the SLP.
  • Step 605 The SLP forwards the SUPL RESPONSE message sent by the E-SLP to the UE.
  • the E-SLP After obtaining the location information of the UE, the E-SLP provides the IMS service layer, and the IMS service layer determines an appropriate PSAP according to the location information to complete the establishment of the emergency call.
  • the SLP acts as a full proxy role, and all UE SUPL messages are forwarded to the E-SLP via the SLP, and the responses and processing results returned by the E-SLP are forwarded to the UE via the SLP.
  • FIG. 7 is a flowchart of a third embodiment of implementing emergency positioning according to the present invention.
  • the SLP only proxies the message between the initial UE and the E-SLP, and when the UE and the E-SLP establish the SUPL. After the connection, the subsequent SUPL positioning message is directly transmitted between the UE and the E-SLP, which improves the positioning efficiency.
  • steps 700 to 703 is completely consistent with steps 600 to 603.
  • the E-SLP directly transmits the SUPL RESPONSE message to the UE without being forwarded by the SLP.
  • the UE After receiving the SUPL RESPONSE message sent by the E-SLP, the UE will directly establish a SUPL positioning connection with the E-SLP, and the UE directly sends the SUPL positioning initialization message to the E-SLP (step 705) instead of the SLP.
  • the subsequent E-SLP and the UE establish a positioning procedure by the interaction of the positioning message, and all messages between the UE and the E-SLP are forwarded by the SLP.
  • the E-SLP obtains the location information of the UE, it provides the IMS service layer, and the IMS service layer determines an appropriate PSAP according to the location information to complete the establishment of the emergency call (step 706).
  • the E-SLP in order to avoid the behavior disorder of the UE, such as the UE sending the SUPL START to the SLP, but receiving the SUPL RESPONSE from the E-SLP, the E-SLP must maintain some negotiation between the SLP and the UE. Key information, such as: SUPL session ID negotiated by the UE and the SLP, by which the UE identifies a unique SUPL session.
  • the E-SLP can add a suitable identifier in the SUPL RESPONSE.
  • the UE initiated SUPL positioning initiation request is forwarded by the SLP to the E-SLP processing, so that the UE can update the SUPL session information held by the terminal itself.
  • the identifier may be a Request Redirected Flag or an address carrying the original SLP.
  • FIG. 8 is a flowchart of a fourth embodiment of the present invention for implementing emergency positioning.
  • the SLP rejects the positioning initiation request initiated by the UE, and notifies E- The SLP initiates an emergency location process.
  • the specific includes:
  • Step 800 The UE attaches to the IP access network and is assigned an IP address. And, the UE has found the address of the SLP, which is used to serve normal positioning.
  • the discovered SLP is a V-SLP, and if the UE is at the home network, then the discovered SLP is an H-SLP.
  • Step 801 After the UE accesses the IP access network, when an emergency call needs to be initiated, an emergency call is initiated to the upper IMS service layer, and the emergency call is routed to the E-CSCF.
  • Step 802 The UE initiates a SUPL START message to the SLP, and carries an emergency identifier in the SUPL START message.
  • Step 803 After receiving the SUPL START message initiated by the UE, the SLP finds that it should be
  • the SLP sends a SUPL End (SUPL END) message to the UE.
  • SUPL END SUPL End
  • appropriate description information may be further included to indicate that the positioning request initiated by the UE has notified the E-SLP.
  • Step 804 While the SLP performs step 803, the SLP sends a notification message to the E-SLP, informing the UE that it wants to initiate an emergency location procedure.
  • the SLP can include the complete SUPL START message in the notification message and send it to the E-SLP.
  • the necessary information required for the E-SLP to initiate the positioning process such as the IP address of the UE, is included.
  • Step 805 After receiving the notification message sent by the SLP, the E-SLP initiates a SUPL initialization message (SUPL INIT) to the UE, where the emergency identifier is carried.
  • Step 806 After receiving the SUPL INIT message sent by the E-SLP, the UE returns a SUPL POS INIT message to the E-SLP according to an existing procedure.
  • SUPL INIT SUPL initialization message
  • Step 807 After receiving the SUPL POS INIT message sent by the UE, the E-SLP continues the subsequent processing procedure, and establishes a SUPL connection with the UE to obtain the location information of the UE. After obtaining the location information of the UE, the E-SLP provides the IMS service layer, and the IMS service layer determines an appropriate PSAP according to the location information to complete the establishment of the emergency call.
  • the UE finds an SLP for common positioning, and after the emergency call is initiated, the UE initiates a SUPL positioning start request to the SLP. , the request carries an emergency sign. And because the SLP and E-SLP are in the same network, the SLP can configure the address of the E-SLP locally.
  • the SLP may notify the UE to re-initiate the request to the E-SLP, or may forward the request to the E-SLP as a proxy, or notify the E-SLP to initiate an emergency location initialization request to the UE.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Public Health (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un système pour réaliser une localisation d'urgence. Le procédé comprend les étapes suivantes : après qu'un équipement utilisateur (« User Equipment » ou UE) transmet un appel d'urgence, il transmet une localisation d'urgence de localisation de plan utilisateur sécurisé (« Security User Plane Location » ou SUPL) à une plate-forme de localisation SUPL (« SUPL Location Platform » ou SLP) (400); la SLP envoie la localisation d'urgence de SUPL à une SLP d'urgence (« Emergency SLP » ou E-SLP) pour réaliser la localisation (401). Grâce à la présente invention, comme la SLP pour le service de localisation d'urgence est la E-SLP, la réalisation normale du procédé de localisation d'urgence peut être garantie, et donc un appel d'urgence réussi est assuré.
PCT/CN2010/075528 2009-09-28 2010-07-28 Procédé et système pour réaliser localisation d'urgence WO2011035648A1 (fr)

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CN200910093798.8 2009-09-28
CN2009100937988A CN102036205A (zh) 2009-09-28 2009-09-28 一种紧急定位实现方法及系统

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US20200154241A1 (en) * 2018-11-08 2020-05-14 Mediatek Inc. Methods for reliable transmission of a supl init message

Citations (3)

* Cited by examiner, † Cited by third party
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WO2007043753A1 (fr) * 2005-10-07 2007-04-19 Lg Electronics Inc. Procede et systeme de service de localisation
KR20070093274A (ko) * 2006-03-13 2007-09-18 삼성전자주식회사 Ｓｕｐｌ을 이용한 응급 서비스 시스템 및 방법
CN101305636A (zh) * 2005-09-15 2008-11-12 高通股份有限公司 紧急电路模式呼叫支持

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Publication number Priority date Publication date Assignee Title
CN101305636A (zh) * 2005-09-15 2008-11-12 高通股份有限公司 紧急电路模式呼叫支持
WO2007043753A1 (fr) * 2005-10-07 2007-04-19 Lg Electronics Inc. Procede et systeme de service de localisation
KR20070093274A (ko) * 2006-03-13 2007-09-18 삼성전자주식회사 Ｓｕｐｌ을 이용한 응급 서비스 시스템 및 방법

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