WO2010127529A1 - Procédé et système d'établissement d'un service de sous-système multimédia par internet - Google Patents

Procédé et système d'établissement d'un service de sous-système multimédia par internet Download PDF

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Publication number
WO2010127529A1
WO2010127529A1 PCT/CN2009/074021 CN2009074021W WO2010127529A1 WO 2010127529 A1 WO2010127529 A1 WO 2010127529A1 CN 2009074021 W CN2009074021 W CN 2009074021W WO 2010127529 A1 WO2010127529 A1 WO 2010127529A1
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WIPO (PCT)
Prior art keywords
address
emergency
cscf
message
registration request
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PCT/CN2009/074021
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English (en)
Chinese (zh)
Inventor
朱春晖
宗在峰
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中兴通讯股份有限公司
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Publication of WO2010127529A1 publication Critical patent/WO2010127529A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/436—Arrangements for screening incoming calls, i.e. evaluating the characteristics of a call before deciding whether to answer it
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2242/00—Special services or facilities
    • H04M2242/04—Special services or facilities for emergency applications
    • 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
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and system for establishing a multimedia subsystem service of an Internet Protocol (IP).
  • IP Internet Protocol
  • the IP Multimedia Core Subsystem is the core of the new generation of communication networks. It uses the Session Initiation Protocol (SIP) system. SIP is independent of access and has many functions such as separation of media service control functions from bearer separation, call and session separation, application and service separation, service and network separation, and convergence of mobile network and Internet services.
  • SIP Session Initiation Protocol
  • IMS is independent of access
  • emergency services EMC, Emergency Call
  • GPRS general packet radio service
  • SAE system architecture evolution
  • Figure 1 shows the main network elements involved in the emergency call of the user equipment (UE, User Equipment) accessing the IMS through the SAE; wherein the solid line indicates signaling and the dotted line indicates the user's IP channel.
  • UE User Equipment
  • the main network elements involved in the emergency call of the UE to access the IMS through the SAE include: the network element of the SAE network part, the network element of the location service (LCS) part, and the network element of the IMS emergency service part. .
  • the network element of the SAE network part is configured to provide the underlying bearer management and mobility management.
  • the network elements of the SAE network part include: an enhanced radio base station (eNodeB), a mobility management entity (MME, Mobility Management Entity), and a user plane data routing processing network element (SAE GW); the SAE GW includes a packet data network gateway (P -GW, Packet Data Network Gateway) and Service Gateway (S-GW, Serving GW).
  • eNodeB enhanced radio base station
  • MME mobility management entity
  • SAE GW user plane data routing processing network element
  • P -GW Packet Data Network Gateway
  • S-GW Service Gateway
  • the MME is responsible for managing and storing the context of the UE (eg, UE identity/user identity, mobility management state, user security parameters, etc.), assigning a temporary identity to the user, when the UE is camped in the tracking area
  • the domain or network it is responsible for authenticating the UE.
  • the P-GW is a mobility anchor in the SAE system. It is a border gateway between the SAE and the Packet Data Network (PDN). It is responsible for PDN access and forwarding data between the SAE and the PDN.
  • PDN Packet Data Network
  • the Policy and Charging Control (PCC) network element is set to establish effective policy and charging control at the underlying carrier layer and the upper layer.
  • the PCC network element includes: a Policy and Charging Rules Function (PCRF), and a Policy and Charging Enforcement Function (PCEF).
  • PCRF Policy and Charging Rules Function
  • PCEF Policy and Charging Enforcement Function
  • PCRF is an important functional entity of the PCC architecture, and is set to acquire, assemble, and deliver control policies and charging rules.
  • PCEF is the implementation point of specific policy and charging, usually located in the GW (Gateway) function; in the SAE network, the PCEF function is located in the P-GW.
  • the network element of the LCS part is set to the address of the emergency call providing location service and Public Safety Answering Point (PSAP).
  • the network elements in the LCS part include: a Location Require Function (LRF), which is a logical functional entity defined in the emergency call architecture to provide users with emergency call session control functions (E-CSCF, Emergency-CSCF). Location, and find the appropriate PSAP based on the location.
  • LRF Location Require Function
  • E-CSCF emergency call session control functions
  • GMLC Gateway The Mobile Location Center
  • GMLC Gateway The Mobile Location Center
  • the network element of the IMS emergency service part is set to control and process the session of the emergency call.
  • the network elements of the IMS emergency service part include:
  • HSS Home Subscriber Server
  • the Call Session Control Function is the core network element that controls the session process.
  • the CSCF includes the Proxy Call Session Control Function (P-CSCF, Proxy-CSCF), and the Call Session Control Function (I-CSCF, Interrogating).
  • P-CSCF Proxy Call Session Control Function
  • I-CSCF Call Session Control Function
  • -CSCF Serving Call Session Control Function
  • E-CSCF E-CSCF.
  • the E-CSCF is the session control center of the emergency call, which determines which PSAP the emergency call should be routed to.
  • Step 1 Establish an emergency bearer
  • the UE initiates an emergency attach, that is, when the UE initiates the normal attach, the emergency service identifier is carried to notify the bearer network that the current attachment is for the emergency call; after the bearer network receives the emergency attach request of the UE, the emergency access point name is passed.
  • -APN Emergency Access Point Name
  • This default bearer is mainly used for signaling control.
  • Step 2 initiate an emergency call
  • the UE initiates an emergency call, that is, by carrying an emergency service identifier in a normal INVITE message, indicating that the call request is an emergency call; the UE fills in the emergency number in the called number, and if the UE is in the visited place, the emergency The number is the emergency number of the visited place; the emergency call is routed to the E-CSCF, and the E-CSCF queries the LRF for the address of the PSAP; the LRF determines which PSAP to serve the UE by querying the location information of the UE; the E-CSCF is obtained After the PSAP address, the call is routed to the PSAP.
  • FIG. 2 illustrates a process in which a UE with normal subscription and unrestricted access initiates an emergency bearer to the SAE in the prior art, and initiates a normal registration in the IMS, including the following steps:
  • Step 201 The UE sends an emergency attach request or an emergency PDN connection establishment request (collectively referred to as an emergency bearer setup request) to the MME, where the request carries an emergency service identifier.
  • the UE When the UE initiates an emergency PDN connection establishment request, the UE has normally attached to the SAE network and has a normal PDN connection.
  • Step 202 The MME selects a P-GW, and initiates a default bearer request to the P-GW to establish an emergency bearer.
  • Step 203 After receiving the default bearer response sent by the P-GW, the MME returns an emergency attach response or an emergency PDN connection setup response to the UE.
  • Step 204 The UE initiates a registration request for normal service of the IMS to the P-CSCF by using the established emergency bearer.
  • Step 205 The P-CSCF sends the registration request of the IMS normal service to the I-CSCF.
  • Step 207 Since the current subscriber's subscription status in the HSS is normal (this normal state is because the HSS stores information that the UE was successfully registered in the MME before), the HSS will return a response success message to the I-CSCF. : Cx query response / Cx select pull response (Cx-Query Resp / Cx-Select-Pull Resp) message, notify the I-CSCF that the current state of the UE is normal, and can register the normal service of the IMS;
  • Step 208 The I-CSCF completes the registration process of the IMS normal service subsequent to the UE; after that, the UE can perform normal IMS service.
  • the UE establishes an emergency bearer by urgently attaching to the SAE network or by establishing an emergency PDN connection to the SAE network, but uses the emergency bearer to perform non-emergency IMS normal service on the IMS network; Will lead to the following problems:
  • the SAE is inconsistent with the user data in the IMS, that is, the UE is recorded in the SAE network to establish an emergency bearer, and the IMS network records that the UE is performing normal IMS service;
  • the IMS network element (for example, the HSS, the I-CSCF, and the P-CSCF) cannot use the emergency bearer to initiate the IMS using the emergency bearer because the UE cannot use the emergency bearer to initiate the registration request of the IMS normal service. The registration of the service, and thus the UE cannot use the emergency bearer to perform normal IMS services.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a method and system for establishing an IMS service, so that the IMS network element knows whether the UE uses the emergency load when initiating the registration request of the IMS normal service.
  • the present invention provides a method for establishing an IP multimedia subsystem service. The method includes:
  • the MME After the MME establishes an emergency bearer for the user equipment UE, the MME sends the IP address corresponding to the emergency bearer to the home subscriber server HSS, and notifies the HSS that the IP address is an IP address used for emergency services.
  • the HSS locally records the IP address as an IP address used for emergency services
  • the UE initiates a registration request of the IP Multimedia Subsystem IMS normal service by using the IP address, and the HSS, and/or the I-CSCF, and/or the P-CSCF 4 rejects the IP address according to the IP address. Describe the registration request. Further, the step C includes:
  • the UE initiates a registration request for the normal service of the IMS to the P-CSCF by using the established emergency bearer;
  • the P-CSCF sends the registration request to the I-CSCF
  • the I-CSCF after receiving the registration request, sends a Cx query or a Cx selection pull message to the HSS to perform a query on a user status; wherein the Cx query or the Cx selection pull message carries Said IP address;
  • the HSS After receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, the HSS extracts the IP address included in the message, and determines that the IP address is used for emergency services. After the IP address, the C-query response response message or the Cx selection pull response message rejecting the registration request is returned to the I-CSCF, and the I-CSCF sends a response message rejecting the registration request to the UE through the P-CSCF. ; and / or
  • the HSS After receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, the HSS extracts the IP address included in the message, and after determining that the IP address is an IP address for emergency service, Returning, to the I-CSCF, a Cx query response message or a Cx selection pull response message, where the Cx query response message or the Cx selection pull response message includes information that the IP address is an IP address for emergency service, where the I - the CSCF sends a response message rejecting the registration request to the UE through the P-CSCF according to the Cx Query Response message or the Cx Select Pull Response message; and/or
  • the HSS After the HSS receives the Cx query message or the Cx selection pull message sent by the I-CSCF, Extracting the IP address included in the message, and returning a Cx query response message or a Cx selection pull response message to the I-CSCF after determining that the IP address is an IP address for emergency service, the Cx query
  • the response message or the Cx selection pull response message includes information that the IP address is an IP address for emergency service
  • the I-CSCF sends the Cx query response message or Cx selection pull response information to the P-CSCF
  • the P-CSCF sends a response message rejecting the registration request to the UE according to the Cx query response message or the Cx selection pull response information.
  • the method further comprises:
  • the P-CSCF records that the IP address is information for an IP address of an emergency service, to reject a registration request for an IMS normal service initiated by using the IP address;
  • the P-CSCF records a user identifier or a UE identifier of a user who initiates a registration request for an IMS normal service using the IP address to reject an IMS request initiated by using the user identifier or the UE identifier.
  • the step that the MME establishes an emergency bearer for the UE in the step A includes: a, the UE sends an emergency bearer setup request to the MME, where the emergency bearer setup request carries an emergency service identifier;
  • the MME parses the packet data network gateway P-GW corresponding to the emergency service identifier by using a domain name system, or selects a P-GW supporting emergency services according to a local configuration, and parses out or selects the P-GW.
  • the GW initiates establishment of a default bearer request to establish an emergency bearer; a3.
  • the parsed or selected P-GW sends a default bearer response to the MME.
  • the method further includes: after receiving the establishment of the default bearer response, the MME returns an emergency bearer setup response to the UE.
  • the emergency bearer setup request is an emergency attach request or an emergency packet data network PDN connection establishment request;
  • the emergency bearer setup response is an emergency attach response or an emergency PDN connection setup response.
  • the emergency service identifier is an emergency access point name.
  • the MME is configured to notify the HSS that the IP address is used as follows
  • the IP address of the emergency service is used as follows:
  • the MME sends a notification request message to the HSS, where the notification request message includes: the IP address, and the emergency service identifier used to identify the IP address as an IP address for emergency services.
  • the invention also provides an IMS service establishment system, which system comprises an MME, a P-CSCF,
  • I-CSCF and HSS where:
  • the MME is configured to establish an emergency bearer by the UE, and after the emergency bearer is established, send the IP address corresponding to the emergency bearer to the HSS, and notify the HSS that the IP address is an IP address used for the emergency service;
  • the HSS is configured to locally record that the IP address is an IP address for emergency services; the HSS is further configured to: when the UE initiates a registration request for an IMS normal service by using the IP address, according to the IP address Reject the registration request;
  • the I-CSCF is configured to reject the registration request according to the IP address when the UE initiates a registration request for an IMS normal service by using the IP address;
  • the P-CSCF is configured to reject the registration request according to the IP address when the UE initiates a registration request for an IMS normal service using the IP address. Further, the P-CSCF is further configured to: when the UE uses the established emergency bearer to initiate a registration request for the IMS normal service, send the registration request to the I-CSCF; The response message of the registration request is further configured to: according to the Cx query response message or Cx selection pull response information sent by the I-CSCF, including the information that the IP address is an IP address for emergency service, to the UE Sending a reply message rejecting the registration request;
  • the I-CSCF is further configured to: after receiving the registration request, send a Cx query or a Cx selection pull message to the HSS to perform a query of a user status; wherein the Cx query or the Cx selection pull message carries
  • the IP address is further configured to send, by the P-CSCF, a response message rejecting the registration request to the UE; and further configured to send, by the HSS, information that the IP address is an IP address used for emergency services
  • the Cx query response message or the Cx selection pull response message sends a response message rejecting the registration request to the UE through the P-CSCF;
  • the Cx query response message or the Cx selection pull response message sent by the HSS that includes the IP address is information for the IP address of the emergency service is sent to the P-CSCF;
  • the HSS is further configured to: after receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, extract the IP address included in the message, and determine that the IP address is used for emergency services. After the IP address, the Cx query response message or the Cx selection pull response message rejecting the registration request is returned to the I-CSCF; and is further configured to receive the Cx query message sent by the I-CSCF or the Cx selection pull message. Extracting the IP address included in the message, and returning a Cx query response message or a Cx selection pull response message to the I-CSCF after determining that the IP address is an IP address for emergency service, the Cx The query response message or the Cx selection pull response message contains information that the IP address is an IP address for emergency services.
  • the P-CSCF is further configured to record information that the IP address is an IP address used for emergency services, to reject a registration request for an IMS normal service initiated by using the IP address;
  • the user identifier or the UE identifier of the user who initiates the registration request of the IMS normal service to reject the IMS request initiated by using the user identifier or the UE identifier.
  • the system further includes: a P-GW, where the P-GW is the emergency service identifier that is parsed by the domain name system when the MME sends an emergency bearer setup request carrying an emergency service identifier to the UE a P-GW, or a P-GW supporting emergency services selected according to a local configuration; the P-GW is configured to initiate a default bearer request by the MME to establish an emergency bearer; and is further configured to send to the MME Establish a default bearer response.
  • a P-GW where the P-GW is the emergency service identifier that is parsed by the domain name system when the MME sends an emergency bearer setup request carrying an emergency service identifier to the UE a P-GW, or a P-GW supporting emergency services selected according to a local configuration
  • the P-GW is configured to initiate a default bearer request by the MME to establish an emergency bearer
  • the method and system of the present invention can enable the IMS network element to know the IP address corresponding to the emergency bearer in time after the establishment of the emergency bearer of the UE, and effectively prevent the UE from using the emergency bearer to initiate.
  • Figure 1 shows the primary network element involved in the emergency call of the UE to access the IMS through the SAE.
  • Figure 2 depicts the establishment of an emergency bearer initiated by the UE with normal subscription and unrestricted access to the SAE in the prior art. The process of initiating normal registration;
  • 3 is a flow chart of a method for establishing an IMS service according to the present invention.
  • FIG. 4 is a schematic structural diagram of an IMS service establishment system of the present invention.
  • FIG. 3 is a flow chart of a method for establishing an IMS service according to the present invention.
  • FIG. 3 is a flowchart of a process for a UE to establish a SAE emergency bearer, or an SAE emergency service, and use the emergency bearer to initiate registration of an IMS normal service, the method Specifically, the following steps are included:
  • Step 301 The UE sends an emergency attach request or an emergency PDN connection establishment request (collectively referred to as an emergency bearer setup request) to the MME, where the request carries an emergency service identifier.
  • the emergency service identifier may be an emergency APN
  • the UE When the UE initiates an emergency PDN connection establishment request, the UE has normally attached to the SAE network and has a normal PDN connection.
  • Step 302 The MME parses the P-GW corresponding to the emergency APN through the domain name system, or selects a P-GW that supports the emergency service according to the local configuration, and initiates a default bearer request to the P-GW to establish an emergency bearer.
  • Step 303 After receiving the default bearer response sent by the P-GW, the MME sends a notification request message to the HSS, where the notification request message includes: an IP address of the UE and an emergency service identifier; after receiving the notification request message, the HSS is Locally record the IP address contained in the message as the information of the IP address used for emergency services;
  • the emergency service identifier is used to indicate that the IP address of the UE is an IP address for emergency service (or the IP address is an IP address of an emergency bearer); the emergency service identifier may be an emergency step 304, and the HSS sends a notification to the MME.
  • the response message indicates that the notification request message of step 303 has been received and has been correctly processed;
  • Step 305 After receiving the default bearer response sent by the P-GW, the MME returns an emergency attach response or an emergency PDN connection setup response to the UE.
  • step 303 and 305 may be performed in parallel, or step 305 may be performed first, and then executed. Go to step 303.
  • Step 306 The UE initiates a registration request of the IMS normal service to the P-CSCF by using the established emergency bearer, and requests to perform normal IMS service.
  • the foregoing registration request carries: an IP address of the UE, and/or a UE identifier/user identifier.
  • Step 307 The P-CSCF sends the registration request of the IMS normal service to the I-CSCF.
  • Step 309 The HSS queries, according to the IP address of the UE, that the IP address is used for emergency services in the SAE, and therefore returns a Cx query response (Cx-Query Resp)/Cx that rejects the user/UE performing IMS normal service registration to the I-CSCF. Select the pull response (Cx-Select-Pull Resp) message;
  • the HSS may send the reason for the rejection (the user initiates the registration of the IMS normal service by using the IP address for the emergency service, or other rejection reasons), and is included in the Cx query response/Cx selection pull response message.
  • the reason for the rejection the user initiates the registration of the IMS normal service by using the IP address for the emergency service, or other rejection reasons
  • the Cx query response/Cx selection pull response message Give the I-CSCF.
  • the HSS since the registration request of the IMS emergency service does not pass through the I-CSCF, when receiving the Cx query/Cx selection pull message sent by the I-CSCF, the HSS knows that the current registration of the IMS normal service is performed.
  • Step 310 The I-CSCF returns a response message rejecting the UE to perform normal service registration of the IMS to the P-CSCF.
  • the reason for the rejection of the HSS transmission may be included in the response message and sent to the P-CSCF; Step 311, the P-CSCF returns a response message rejecting the IMS normal service registration to the UE; optionally, the P-CSCF may The IP address is blacklisted, and the registration request for the normal service of the IMS initiated by the IP address is rejected.
  • the P-CSCF can also initiate the user identity of the user who registers the IMS normal service by using the IP address of the emergency bearer, Or the UE identifier is blacklisted and the subsequent IMS request of the corresponding user is rejected.
  • the above embodiment may also have various transformation manners, for example:
  • the HSS may send the information of the IP address included in step 308 to the IP address for emergency service in step 309.
  • the I-CSCF stores the corresponding information, judges that the IP address cannot be used for the IMS normal service based on the information, and instructs the P-CSCF to reject the registration request in step 310.
  • the I-CSCF may further notify the P-CSCF that the IP address is an IP address used for emergency services; the P-CSCF may also store corresponding information, and according to the information, determine that the IP address cannot be used for normal IMS services, and In step 311, the normal registration request of the UE is rejected.
  • FIG. 4 is a schematic structural diagram of an IMS service establishment system according to the present invention. As shown in FIG. 4, the system includes an MME, a P-GW, a P-CSCF, an I-CSCF, and an HSS;
  • the MME is configured to interact with the P-GW that supports the emergency service, and establish an emergency bearer for the UE, and after the emergency bearer is established, send the IP address corresponding to the emergency bearer to the HSS;
  • the HSS is configured to locally record that the IP address is an IP address for emergency services, and/or to notify the I-CSCF that the IP address is an IP address for emergency services, and/or by the I
  • the CSCF notifies the P-CSCF that the IP address is an IP address for emergency services.
  • the registration request can be rejected.
  • the registration request may be rejected in the following manner: after receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, the HSS extracts the IP address included in the message, and determines at the After the IP address is an IP address for emergency service, return a Cx query response message or a Cx selection pull response message rejecting the registration request to the I-CSCF, where the I-CSCF passes through the P-CSCF Said UE sends a response message rejecting said registration request; or
  • the HSS After receiving the Cx query message or the Cx selection pull message sent by the I-CSCF, the HSS extracts the IP address included in the message, and after determining that the IP address is an IP address for emergency service, Returning, to the I-CSCF, a Cx query response message or a Cx selection pull response message, where the message includes the IP address being information of an IP address for emergency service, and the I-CSCF passes the P according to the information. The CSCF sends a response message rejecting the registration request to the UE.
  • the network elements in the IMS service establishment system of the present invention and the connection relationship (message interaction relationship) between the network elements are briefly described. For detailed functions of each network element included in the system, refer to the description of the method shown in FIG. 3 above.
  • the invention can enable the IMS network element to know the IP address corresponding to the emergency bearer in time after the establishment of the emergency bearer of the UE, which effectively prevents the UE from using the emergency bearer to initiate the normal service of the IMS, and therefore has strong industrial applicability.

Abstract

La présente invention concerne un procédé permettant l'établissement d'un service de sous-système multimédia par Internet. Dans un premier temps selon ce procédé, une fois que l'entité de gestion de mobilité ou "MME" (Mobility Management Entity) a établi un moyen d'acheminement d'urgence pour un équipement utilisateur ou "UE" (User Equipment), elle envoie au serveur d'abonnés de référence ou "HSS" (Home Subscriber Server) une adresse IP correspondant à ce moyen d'acheminement d'urgence, et informe le HSS que l'adresse IP est une adresse IP utilisée au niveau du moyen d'acheminement d'urgence. Dans un deuxième temps, le HSS enregistre en local que l'adresse IP est une adresse IP utilisée au niveau du moyen d'acheminement d'urgence. Enfin, dans un troisième temps, le HSS informe une fonction de contrôle de session de liaison d'interrogation ou "I-CSCF" (Interrogating Call Session Control Function) que l'adresse IP est une adresse IP utilisée au niveau du moyen d'urgence, et/ou informe une fonction de commande de session de liaison mandataire ou "P-CSCF" (Proxy Call Session Control Function), par l'intermédiaire de la I-CSCF, que l'adresse IP est une adresse IP utilisée au niveau du moyen d'urgence. Une fois que le moyen d'acheminement d'urgence de l'équipement utilisateur a été établi, l'invention permet ainsi à un élément de réseau d'un sous-système multimédia par Internet ou "IMS" (IP Multimedia Subsystem) d'obtenir à temps l'adresse IP correspondant au moyen d'acheminement d'urgence, ce qui fait qu'on évite effectivement que l'équipement utilisateur ne lance un service naturel d'IMS en se servant du moyen d'acheminement d'urgence.
PCT/CN2009/074021 2009-05-07 2009-09-18 Procédé et système d'établissement d'un service de sous-système multimédia par internet WO2010127529A1 (fr)

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CN2009101376887A CN101730039B (zh) 2009-05-07 2009-05-07 一种ip多媒体子系统业务的建立方法及系统
CN200910137688.7 2009-05-07

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WO2010127529A1 true WO2010127529A1 (fr) 2010-11-11

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