WO2009152767A1 - Procédé d’établissement d’une communication et son dispositif - Google Patents

Procédé d’établissement d’une communication et son dispositif Download PDF

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Publication number
WO2009152767A1
WO2009152767A1 PCT/CN2009/072315 CN2009072315W WO2009152767A1 WO 2009152767 A1 WO2009152767 A1 WO 2009152767A1 CN 2009072315 W CN2009072315 W CN 2009072315W WO 2009152767 A1 WO2009152767 A1 WO 2009152767A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
session
bearer
identifier
calling
Prior art date
Application number
PCT/CN2009/072315
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English (en)
Chinese (zh)
Inventor
金辉
龙水平
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2009152767A1 publication Critical patent/WO2009152767A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H04W36/00226—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]
    • 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

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a call setup method, apparatus, and system. Background technique
  • CS circuit-switched
  • CDMA Code Division Multiple Access
  • MSC Mobile Switching Centre
  • the IP Multimedia Subsystem is an IP-switched service network.
  • the IMS supports the UE through various packet-switched access networks (currently mainly IP-capable access networks IP-CAN, IP-Connectivity Access Network).
  • IP-CAN IP-Connectivity Access Network
  • GPRS GPRS
  • IMS IP Multimedia Subsystem
  • IMS is a service platform based on IP-CAN, which basically corresponds to the MSC of the CS network.
  • IP-CAN provides higher bandwidth and supports richer services.
  • the core of IMS is the Call Server Control Function (CSCF) entity and various application servers (AS, Application Server), where the service-call server control function (S-CSCF, Serving-CSCF) is responsible for meeting the conditions. , routing the call request to the correct AS, and the business logic is executed by the AS.
  • CSCF Call Server Control Function
  • AS Application Server
  • S-CSCF service-call server control function
  • Serving-CSCF Serving-CSCF
  • the IMS network is complex. The full deployment of the IMS network cannot be completed in a short period of time. Therefore, the CS network and the IMS network will coexist in a certain period of time. Then, the simultaneous operation of the CS and IMS service platforms will increase the operating cost. If a new service is to be introduced, the operator needs to rebuild both CS and IMS service platforms, increasing construction costs. It is a more reasonable way to transfer the functions of the CS network service platform to the IMS network and realize the unification of the service platform to reduce the new service construction cost and operation cost.
  • the services supported by the unified service platform are called IMS Centralized Service (ICS).
  • the UE establishes an IMS call by using the CS network to carry the voice media, and the CS bearer implements the ICS by establishing a CS call between the UE and the newly introduced service set and the Service Continuity Application Server (SCC AS). , weaken or remove the business processing logic in the MSC.
  • SCC AS Service Continuity Application Server
  • a call setup process is provided in the prior art. As shown in FIG. 1, the UE initiates a session request process through a Gm interface, which specifically includes:
  • the ICS UE A initiates an IMS service request to the UE B through the Gm interface, and the SDP of the request message includes the indication information that uses the CS as the bearer, and the Invite message carries the public identity information of the UE A, and the message passes the UE-A S. -CSCF forwards to SCC AS; (S101, S102)
  • SCC AS allocates SCC AS public service identity directory number (PSI DN, Public) for UE-A
  • the SCC AS sends a response message carrying the SCC AS public service identity directory number PSI DN to the UE-A through the S-CSCF; (S104, S105)
  • UE-A initiates a CS call request to the MSC Server with the SCC AS PSI DN as the called number;
  • the MSC Server returns a call processing message; and sends an IAM message to the MGCF according to the SCC AS PSI DN; (S107, S108)
  • the MGCF converts the IAM message into a SIP Invite message, and the SIP Invite message is
  • the S-CSCF sends the information to the SCC AS, and the SDP information of the message includes the media information of the MGW; (S109, S110)
  • the SCC AS associates the Invite message (session control signaling) in step S102 with the Invite message (bearer control signaling) in step S110, and merges the SDP messages in the two Invite messages into one Invite message.
  • the message is forwarded to the UE-B via the S-CSCF; (Sill, S112) completes the process of establishing the session control signaling and the CS bearer. (S113)
  • the SCC AS associates the session mainly according to the public user identity information, so that when one user has two devices UE-1 and UE-2 with the same public user identity, and UE-1 has one CS session, the UE -2
  • the SCC AS cannot judge that the call is from the public user identity only.
  • UE-1 is also UE-2. Therefore, it cannot be determined whether it is necessary to establish a new CS bearer for UE-1 or share an existing CS bearer, resulting in poor communication.
  • an embodiment of the present invention provides a call setup method and apparatus.
  • the call request can be distinguished.
  • the user equipment determines whether it is necessary to establish a corresponding bearer for the user equipment or share an existing circuit domain bearer to successfully establish a communication link.
  • An embodiment of the present invention provides a call setup method, including:
  • the circuit switching bearer of the existing session establishes a session.
  • a receiving unit configured to receive an IMS service request message from the calling user equipment, to obtain the calling user equipment identifier
  • the determining unit is configured to determine whether the calling user equipment has a circuit service bearer, and the processing unit performs processing on the IMS service request message received by the receiving unit according to the judgment result of the determining unit.
  • An embodiment of the present invention provides a user equipment, including:
  • a sending unit configured to send a session request message that carries the identifier of the user equipment
  • a storage unit configured to store the user equipment identifier.
  • the session and bearer between the peer and the peer are established through the circuit domain session bearer.
  • the IP multimedia subsystem IMS service request message sent by the calling user equipment to the called user equipment carries the calling party.
  • the identity information and the user equipment identifier are associated with the calling user equipment according to the user equipment identifier, and the session establishment process is completed.
  • the user equipment that sends the call request can be distinguished according to the identity information and the user equipment identifier, and the manner of establishing the session and the bearer between the calling party and the called party is determined according to the situation that the user equipment has a circuit service bearer, so as to successfully establish a communication chain. road.
  • FIG. 1 is a schematic flowchart of establishing a call by an ICS UE in the prior art
  • FIG. 2 is a flowchart of a call setup method provided in an embodiment of the present invention.
  • FIG. 3 is a flowchart of a call request initiated by a Gm interface according to Embodiment 1 of the present invention
  • FIG. 4 is a flowchart of a call request initiated by an II interface according to Embodiment 2 of the present invention
  • FIG. 5 is a Gm interface according to Embodiment 3 of the present invention
  • a flowchart of initiating call forwarding
  • FIG. 6 is a schematic structural diagram of an application server provided in an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a user equipment provided in an embodiment of the present invention. detailed description
  • the embodiment of the present invention provides a method for establishing a call.
  • a CS network and an IMS network coexist, when there are multiple user equipments of the same public user identity (such as the same user), it is possible to distinguish which user equipment the call request comes from, thereby It is determined whether a new CS bearer needs to be established for the user equipment or an existing CS bearer is shared.
  • the IMS centralized control service ICS is supported by the transfer of the functions of the CS network service platform to the IMS network and the integration of the service platform.
  • the user equipment UE establishes an IMS call by using the CS network to carry the voice media.
  • the CS bearer implements the ICS by establishing a CS call between the UE and the newly introduced service set and the session continuity application server SCC AS, and at the same time, weakens or removes the MSC in the MSC. Business processing logic.
  • the SCC AS completes the adaptation between the CS domain signaling and the IMS domain SIP signaling, and acts as a user agent to establish and control the IMS session within the IMS domain instead of the user.
  • the control message for the session is transmitted through a signaling channel other than the CS call.
  • a signaling channel other than the CS call.
  • different messaging protocols may be used, and only the CS domain is connected.
  • the circuit can be transmitted through a circuit-switched service control signaling channel (eg, II interface) between the UE and the SCC; for example, when the UE is in an IP-CAN connection without VoIP capability, it can pass through the IP-CAN.
  • the packet exchange service control signaling channel (for example, the Gm interface) between the UE and the SCC is transmitted, and the Gm interface mainly transmits the procedures related to registration, user service control, and authentication between the user and the CSCF.
  • the Gm interface has the advantages of a large amount of transmission information and a rich transmission content with respect to the circuit-switched session control signaling channel (for example, the II interface). It is recommended that when the packet-switched service control signaling channel and the circuit-switched service control signaling channel are simultaneously available, The packet switched service control signaling channel is preferentially selected as the channel for session control message transmission.
  • the UE when the UE has a Gm or II interface, multiple calls can be initiated on the CS network, and the calls share the same CS bearer, that is, only the first CS call needs to establish a CS bearer, and when a second CS call request is initiated.
  • the CS bearer is not required to be established, the CS bearer is shared with the first CS call.
  • an embodiment of the present invention provides a call setup method.
  • a Gm interface and an II interface are respectively used as a packet switched session control signaling channel and a circuit switched session control signaling channel, and the method includes the following steps. :
  • the calling user equipment sends an IMS service request message to the called user equipment, where the message carries the identity information of the calling party and the user equipment identifier.
  • the device identifier is a unique identifier that is set in advance for different user devices of the same user; or the device identifier is a unique identifier that is assigned to different user devices of the same user during the registration process, such as GRUU; or
  • the device identifier is the mobile communication international identification code IMEI of the user equipment, or the mobile station international ISDN number MSISDN/mobile subscriber directory number MDN.
  • the device identification is stored in the user equipment.
  • the user equipment identifier is obtained from the service request message, and it is determined whether the user equipment has a circuit service bearer; if there is a circuit service bearer, step S203 is performed, otherwise, step S204 is performed;
  • the calling user equipment supports the II interface, and sends the IMS service request message through the II interface, the information obtained from the II interface generates a new service request message, and forwards the new service request message to the called user. device.
  • PSI DN public service identity directory number
  • the calling user equipment supports the Gm interface, and the IMS service request message is sent through the Gm interface, after the PSI DN number is assigned to the calling user equipment, the response message is sent to the calling user equipment, where the response message carries The PSI DN number.
  • the session and the bearer between the calling party and the called party are established through the circuit domain CS network bearer, including:
  • the service request message carrying the session control signaling is associated with the SIP service request message, and the session description protocol (SDP) message in the two messages is combined and sent to the second user equipment.
  • SDP session description protocol
  • the allocated PSI DN number is sent to the calling user equipment through the II interface.
  • the access network can be changed without interrupting the session when the user moves.
  • the access network needs to be changed, and the media in the session is continuously switched.
  • the SCC AS performs the switching function of the call branches between different access networks.
  • the ISC user equipment When the ISC user equipment detects that the surrounding wireless environment changes or other changes occur, it will switch according to the previously defined switching policy.
  • the ISC user equipment initiates a handover request from the access network to be switched to the SCC AS, and the SCC AS establishes a connection with the ISC user equipment in the handover access network, and switches the remote session connection to the new connection, and releases the cut-out connection.
  • the embodiment of the present invention further provides a call forwarding method, in which an IMP service session exists between a first user equipment and a second user equipment in a PS network, and the method includes:
  • a service request message with a session transfer identifier as the called number, where the session description protocol SDP field of the service request message includes the use of the circuit domain as the bearer indication information, where the service
  • the request message carries the identity information and the device identifier of the first user equipment;
  • the session transfer identifier STI is an identifier used to indicate that a session transfer needs to be initiated, and may be dynamically allocated by the SCC AS or pre-stored in the UE.
  • the STI initiates the call with the STI as the called number.
  • the SCC AS can determine that the call is a session transfer request according to the called number, and transfer the session control path and the media transmission path to the new network through the session negotiation.
  • circuit service bearer If the circuit service bearer does not exist, assign the PSI DN number to the first user equipment, and send the PSI DN number to the first user equipment;
  • the interacting with the MSC server includes:
  • the MSC server returns a call processing message.
  • the service request message carrying the session control signaling is associated with the SIP service request message, and the SDP messages in the two messages are combined and sent to the second user equipment; Establishing session control signaling and circuit domain bearer between the first user equipment and the second user equipment.
  • a call setup method provided in the embodiment of the present invention includes the following steps:
  • the calling ICS UE A initiates a session request to the called UE C through the Gm interface, and carries the public identity information and the user equipment identifier of the UE A in the service request Invite message;
  • the user equipment identifier is a device identifier assigned by the network, and the device identifier is assigned by different UEs of the same identity during the registration process, such as GRUU; or may be a unique identifier defined by the user, and the user defines different names for different UEs or No.; or the user equipment identifier adopts IMEI, International Mobile Equipment Identity number, or MSISDN/MDN.
  • the user equipment identifier is stored in the user equipment UE, and when the Invite request is initiated by the UE, it is carried in the contact information or in the SDP information.
  • a UEID: ⁇ IMEI number or ⁇ 181801 ⁇ / ⁇ 101 ⁇ >
  • the UE A includes the PSI DN in the SDP part of the Invite.
  • the Invite message first arrives at the S-CSCF of UE-A;
  • S302 The S-CSCF forwards the Invite message to the SCC AS.
  • the SCC AS After receiving the Invite message, the SCC AS extracts the user equipment identifier, which may be an IMEI, or an MSISDN/MDN, or an IP address, or a GRUU, or a PSI DN, and queries whether the user equipment UE-A has a CS bearer:
  • the user equipment identifier which may be an IMEI, or an MSISDN/MDN, or an IP address, or a GRUU, or a PSI DN
  • the UE-A does not have a CS bearer, the UE-A is assigned an SCC AS PSI DN number, and the session and the bearer between the calling and the called are established through the circuit domain CS network bearer, and the PSI DN is used as the calling originating circuit domain.
  • the called number at the time of the call request, the specific process is to perform the steps S103 to S113 in FIG. 1 and end; if a CS bearer already exists in the UE-A, the new SCC AS PSI DN number is not allocated, and the subsequent operations are directly performed.
  • the SCC AS sends an Invite message to the UE-C, where the SDP information in the invite message sent by the UE A and the SDP information in the CS are sent, and the Invite message first arrives at the S-CSCF.
  • the S-CSCF sends the Invite message to the UE-C.
  • the method further comprises the following steps:
  • step S306 UEs A and B stop communicating via the CS bearer.
  • the public identity information of the calling user equipment and the user equipment identifier in the session request Invite message can distinguish which UE the call request comes from, thereby determining to establish a session and bearer for the corresponding user equipment.
  • a call setup method provided in the embodiment of the present invention includes the following steps:
  • the ICS UE A initiates a session request to the UE C through the II interface, and carries the public identity information of the UE A in the message, and carries the user equipment identifier in the Invite message;
  • the user equipment identifier is a device identifier assigned by the network, and the device identifier is assigned by different UEs of the same identity during the registration process, such as GRUU; or may be a unique identifier defined by the user, and the user defines different names for different UEs or No.; or the user equipment identifier adopts the mobile communication international identification code IMEI, or MSISDN/MDN.
  • the user equipment identifier is stored in the UE, and when the request is initiated through the II interface, it is carried in
  • the SCC AS after receiving the II message, extracts the user equipment identifier, which may be an IMEI, or an MSISDN/MDN, or an IP address, or a GRUU, or a PSI DN, and determines whether the user equipment UE A has a CS bearer;
  • the user equipment identifier which may be an IMEI, or an MSISDN/MDN, or an IP address, or a GRUU, or a PSI DN
  • the UE-A is assigned an SCC AS PSI DN number, and is sent to the UE-A through the II interface;
  • the UE-A is not assigned a new SCC AS PSI DN number and performs subsequent operations.
  • a CS bearer already exists in the UE-A, and therefore, a subsequent step S403 is performed;
  • the SCC AS generates an invite message according to the information obtained from the II interface and the SDP information carried by the CS, and sends the Invite message to the UE-C, where the message first arrives at the S-CSCF;
  • S404 The S-CSCF sends the Invite message to the UE-C.
  • the method further comprises the following steps:
  • step S305 UEs A and B stop communicating via the CS bearer.
  • a session transfer request is initiated through the Gm interface. It is assumed that UE-A and UE-B have a VoIP session in the PS2 network, and the bearer process of the session is as shown in FIG. 1.
  • the Gm interface of the CS network is in the PS1 network. When the user moves outside the coverage of the packet domain network PS2, the user equipment transfers the session to the CS network.
  • the ICS UE A initiates a service request by using the STI as the called number through the Gm interface, and the SDP of the request Invite message includes the indication information that uses the CS as the bearer, and carries the public identity information of the UE A in the Invite message, and simultaneously in the Invite
  • the message carries the user equipment identifier;
  • the user equipment identifier is a device identifier assigned by the network, and the device identifier is assigned by different UEs of the same identity during the registration process; or may be a unique identifier defined by the user, and the user defines different names or numbers for different UEs; or
  • the user equipment identity uses the mobile communication international identification code IMEI, or MSISDN/MDN.
  • the user equipment identifier is stored in the user equipment UE, and when the Invite request is initiated by the UE, it is carried in the contact information or in the SDP information.
  • Or contact ⁇ sip:[5555:: l :2:3:4]>, that is, the contact header contains a UE A IP address.
  • the contact header contains a UE A's GRUU.
  • a UEID: ⁇ IMEI number or ⁇ 181801 ⁇ / ⁇ 101 ⁇ >
  • Or UE A includes a PSI DN in the SDP part of Invite, such as including c lines in the SDP.
  • the message first arrives at the S-CSCF of UE-A;
  • the S-CSCF of the UE-A forwards the message to the SCC AS.
  • the SCC AS After receiving the Invite message, the SCC AS extracts the user equipment identifier, which may be an IMEI, or an MSISDN/MDN, or an IP address, or a GRUU, or a PSI DN, and determines whether the user equipment has a CS bearer.
  • the user equipment identifier which may be an IMEI, or an MSISDN/MDN, or an IP address, or a GRUU, or a PSI DN.
  • the UE-A is assigned the SCC AS PSI DN number; if there is already a CS call, the SCC AS PSI DN is not allocated to the user, and the SCC AS sends an Invite message to the UE-C, which includes the UE A.
  • the SDP information in the sent invite message and the SDP information carried by the CS, the message first arrives at the S-CSCF. It is assumed here that the UE-A does not currently have a CS bearer, so the UE-A is assigned an SCC AS PSI DN number;
  • the SCC AS sends the SCC AS PSI DN to the UE-A by using a response message, where the message first arrives at the S-CSCF;
  • S505 The S-CSCF sends a response message including the SCC AS PSI DN number to the UE A.
  • UE- ⁇ initiates a CS call request with the SCC AS PSI DN as the called number, and the message first arrives at the MSC Server;
  • the MSC Server returns a call processing message
  • the MSC server sends an IAM message to the MGCF according to the SCC AS PSI DN.
  • the MGCF converts the IAM message into a SIP Invite message, and sends the SIP Invite message to the S-CSCF, where the SDP information of the message includes the media information of the MGW.
  • the S-CSCF sends the message to the SCC AS;
  • the SCC AS acts as a back-to-back user agent (B2BUA), and the B2BUA is a logical entity for processing the request, and associates the Invite message (session control signaling) in step S502 with the step S510.
  • Invite message (bearer control signaling), and merges the SDP messages in the two Invite messages into one re-Invite message, and the message is forwarded to the UE-B via the S-CSCF, and the message is used to update the peer end, and Media transfer path update.
  • the S-CSCF sends the message to the UE-B.
  • An embodiment of the present invention further provides an application server.
  • the application server 600 includes:
  • the receiving unit 610 is configured to receive an IMS service request message from the calling user equipment, and obtain the calling user equipment identifier.
  • the determining unit 620 is configured to determine whether the calling user equipment has a circuit service bearer; the processing unit 630, according to the determining result of the determining unit 620, performing an IMS service request message received by the receiving unit 610 for processing;
  • An allocating unit 640 configured to allocate a PSI DN number to the calling user equipment
  • the sending unit 650, the PSI DN number and the service request message allocated by the allocating unit S640 are sent;
  • the allocating unit 640 allocates a PSI DN number to the calling party user equipment;
  • the device identifier is a unique identifier that is set in advance for different user devices of the same user; or the device identifier is a unique identifier that is assigned to different user devices of the same user during the registration process; or
  • the device identifier is a mobile communication international identification code IMEI of the user equipment.
  • the embodiment of the present invention further provides a call setup system, including a service call session control function entity S-CSCF and an application server;
  • the application server 600 is configured to receive a session request message from the calling user equipment, obtain the calling user equipment identifier, and determine whether the user equipment has a circuit service bearer; when determining that the user equipment does not have a circuit service The bearer, the PSI DN number is assigned to the calling user equipment; the PSI DN number is sent to the calling user equipment; when the user equipment has a circuit service bearer, the service request message is forwarded to the called party;
  • the S-CSCF is configured to forward the message sent by the application server to the called user equipment, and establish a session and a bearer between the calling user equipment and the called user equipment.
  • the serving call session control function entity S-CSCF forwards the service request of the autonomous call to the application server.
  • the embodiment of the present invention further provides a user equipment 700, as shown in FIG. 7, including:
  • the sending unit 710 is configured to send a session request message that carries the user equipment identifier.
  • the storage unit 720 is configured to store the user equipment identifier.
  • the receiving unit 730 is configured to receive the allocated PSI DN number.
  • the session establishing unit 740 initiates a circuit domain call request with the PSI DN as the called number, and establishes a session.
  • the user equipment identity may be transmitted over a packet switched network traffic control signaling channel or a circuit switched network traffic control signaling channel.
  • the user equipment identifier is carried in the contact information or in the SDP information for transmission.
  • the request message sent by the calling user equipment to the called user equipment is carried.
  • the identity information of the calling party and the user equipment identity are forwarded to the called party, and the session between the calling party and the called party is established, and the user that can distinguish the sending call request according to the identity information and the user equipment identity is established.
  • the device determines the manner of establishing a session and a bearer between the calling party and the called party according to the situation that the user equipment exists in the circuit service bearer.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

La présente invention concerne un procédé d’établissement d’une communication qui consiste à recevoir un message de demande de service de sous-système multimédia IP (IMS) avec l’identifiant de l’équipement d’utilisateur appelant; obtenir l’identifiant de l’équipement d’utilisateur et demander si une session avec l’équipement d’utilisateur appelant existe conformément à l’identifiant de l’équipement d’utilisateur; utiliser le support de commutation de circuit de la session existante pour établir la session s’il existe déjà une session avec l’équipement d’utilisateur appelant; sinon, établir le support de commutation de circuit. L’invention se rapporte également à un serveur d’application qui comprend une unité de réception pour recevoir le message de demande de service IMS et obtenir l’identifiant de l’équipement d’utilisateur appelant; une unité de détermination permettant de déterminer s’il existe un support de service de circuit avec l’équipement d’utilisateur appelant; une unité de traitement permettant de traiter le message de demande de service IMS conformément au résultat de la détermination. La mise en œuvre de la présente invention permet de distinguer l’équipement d’utilisateur transmettant la demande de communication conformément aux informations d’identité de l’utilisateur et à l'identifiant de l'équipement, et de déterminer le schéma d'établissement de la session et du support entre l'appelant et l'appelé en fonction de la condition d'existence du support de service de circuit de l’équipement d’utilisateur.
PCT/CN2009/072315 2008-06-20 2009-06-17 Procédé d’établissement d’une communication et son dispositif WO2009152767A1 (fr)

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CN200810126968 2008-06-20
CN200810126968.3 2008-06-20
CN200810176510.9 2008-11-07
CNA2008101765109A CN101610503A (zh) 2008-06-20 2008-11-07 一种呼叫建立方法及装置

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