WO2008122235A1 - Procédé de commande d'appel, adaptateur de domaine à commutation de circuits et dispositif terminal - Google Patents

Procédé de commande d'appel, adaptateur de domaine à commutation de circuits et dispositif terminal Download PDF

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Publication number
WO2008122235A1
WO2008122235A1 PCT/CN2008/070654 CN2008070654W WO2008122235A1 WO 2008122235 A1 WO2008122235 A1 WO 2008122235A1 CN 2008070654 W CN2008070654 W CN 2008070654W WO 2008122235 A1 WO2008122235 A1 WO 2008122235A1
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WO
WIPO (PCT)
Prior art keywords
call
party
terminal device
circuit switched
branch
Prior art date
Application number
PCT/CN2008/070654
Other languages
English (en)
French (fr)
Inventor
Shuiping Long
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP08715386A priority Critical patent/EP2117177B1/en
Priority to KR1020097017359A priority patent/KR101095421B1/ko
Priority to JP2009551095A priority patent/JP5095759B2/ja
Priority to ES08715386T priority patent/ES2395990T3/es
Publication of WO2008122235A1 publication Critical patent/WO2008122235A1/zh
Priority to US12/534,278 priority patent/US20090290576A1/en
Priority to US13/300,477 priority patent/US20120063366A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
    • 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
    • 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
    • H04L65/1083—In-session procedures
    • H04L65/1095—Inter-network session transfer or sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • 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]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a call control method, a circuit switched domain adapter, and a terminal device.
  • the mobile communication network is mainly Circuit-Switched (CS), including Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), and the like.
  • CS Circuit-Switched
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • MSC Mobile Switching Center
  • call routing and business logic execution such as call forwarding services, call hold services, and so on.
  • the service provision of the CS network requires the support of the Mobile Switching Centre (MSC), which is disadvantageous for the introduction of new services.
  • MSC Mobile Switching Centre
  • IMS IP Multimedia Sub-system
  • the IMS supports the UE to perform IMS multimedia services based on packet switching through various packet switched access networks.
  • the IMS network based on Packet-Switched (PS) is the future development trend of the communication network, but the IMS network is also a relatively complex network. It is foreseeable that the full deployment of the packet-switched IMS network will not be completed in a short time. It is impossible for all CS network users to replace the new IMS terminal in a short time.
  • the CS network will coexist with the IMS network for a long period of time, so the CS network and the IMS network need to operate at the same time.
  • the existing technology for realizing network coexistence is to realize the interworking between the CS network and the IMS network through a specific network port, such as introducing a Media Gateway Controller (MGC) to convert different call protocols of the two networks.
  • MSC Media Gateway Controller
  • the Media Gateway Controller is a logical functional entity that implements the Media Gateway Control Function (MGCF).
  • the existing technology can realize the communication between the CS network and the IMS network but has the following problems:
  • the CS service control platform provides service services for CS users, in the packet switching network.
  • the IMS service control platform provides service services for IMS users, and the service control platforms of the two networks operate at the same time, which greatly increases the operation cost, and needs to be in the CS service control platform and the IMS service control platform when implementing new services.
  • configuration and update will bring difficulties to the implementation of new services.
  • Embodiments of the present invention provide a call control method, a circuit switched domain adapter, and a terminal device to implement call control of a circuit switched terminal device by a packet switching network control platform.
  • a method for call control provided by an embodiment of the present invention includes:
  • the packet switching server receives a call request sent to the called terminal device of the circuit switched domain; routing the call request to the circuit switched domain adapter;
  • the circuit switched domain adapter requests the called terminal device to establish a circuit switched based call branch
  • the packet switching server receives, by the circuit switching domain adapter, that the message returned by the called terminal device meets a preset trigger condition, establishing a call of the initiator of the call request and the forward target of the called terminal device .
  • circuit call branch establishing unit configured to establish a circuit switching based call branch with the terminal device
  • packet call branch establishing unit configured to establish a packet switching based call branch with the second party
  • call branch binding unit configured to bind the The circuit switched call branch and the packet switched based call branch establish a call connection between the terminal device and the second party.
  • circuit call branch establishing unit configured to establish a circuit switching based call branch with the circuit switched domain adapter
  • control information generating unit configured to generate after the circuit switch-based call branch is established Call control information to the circuit switched domain adapter
  • a control information sending unit configured to send the call control information generated by the control message generating unit to the circuit switched domain adapter through a packet switched access network or a circuit switched network.
  • the embodiment of the present invention establishes a call branch based on circuit switching with a terminal device, and establishes, by the packet switching server, the terminal device to establish a call connection based on packet switching with the second party, and implements a packet switching network. Controlling the call control of the circuit switched terminal equipment.
  • the call control function of the circuit-switched network is abandoned, and the packet switching server provides call control services for the terminal equipment of the circuit-switched domain, which centralizes the entire network control function, reduces the cost of network operation, and makes the implementation of new services easier.
  • FIG. 1 is a flowchart of a method for call control according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for call control according to Embodiment 2 of the present invention.
  • FIG. 3 is a flowchart of a method for call control according to Embodiment 3 of the present invention.
  • FIG. 4 is a flowchart of a method for call control according to Embodiment 4 of the present invention.
  • FIG. 5 is a flowchart of a method for call control according to Embodiment 5 of the present invention.
  • FIG. 6 is a flowchart of a method for call control according to Embodiment 6 of the present invention.
  • FIG. 7 is a flowchart of a method for call control according to Embodiment 7 of the present invention.
  • FIG. 8 is a schematic diagram showing the logical structure of a circuit switched domain adapter according to Embodiment 8 of the present invention.
  • FIG. 9 is a schematic diagram showing the logical structure of a circuit switched domain adapter according to Embodiment 9 of the present invention.
  • FIG. 10 is a schematic diagram showing the logical structure of a ten terminal device according to an embodiment of the present invention.
  • Embodiment 1 A method for call control, which is shown in FIG. 1 and includes:
  • Terminal Equipment and Circuit Switched Domain Adapter (Circuit-Switched domain Adaptor
  • the terminal device may be a network device that performs communication based on circuit switching, for example: may be a mobile phone, a fixed telephone, a network computer or a server, or the like.
  • the circuit switched domain adapter establishes a packet switching based call branch with a second party.
  • the circuit switched domain adapter establishes a call connection between the terminal device and a second party by binding the circuit switched based call leg and the packet switched based call leg.
  • steps 102 and 103 can be understood as: the circuit switched domain adapter proxying the terminal device to establish a packet switched based call connection with the second party under the control of the packet switching server.
  • the packet switching server is a functional entity for performing call control in a packet switching network, and specifically may be: a Telephone Application Server (TAS), a Call Server Control Function (CSCF). ) Server and so on.
  • TAS Telephone Application Server
  • CSCF Call Server Control Function
  • the packet switching server can be a functional entity used by the IMS network for call control.
  • the circuit switched domain adapter establishes a packet switching based call branch with the second party under the control of the packet switching server;
  • circuit switched domain adapter acts as a proxy for the terminal device in the PS network to establish a call with the second party, and the packet switching server provides the call control service to the user through the agent of the circuit switched domain adapter.
  • Embodiment 1 of the present invention establishes a packet-switched call connection with a second party by using a terminal device and a circuit switched domain adapter to implement call control of the circuit switching terminal device by the packet switching network control platform.
  • the call control function of the circuit-switched network is abandoned, and the packet switching server provides call control services for the terminal equipment of the circuit-switched domain, which centralizes the entire network control function, reduces the cost of network operation, and makes the implementation of new services easier to implement.
  • a second embodiment of the present invention provides a call control method.
  • the signaling flowchart is as shown in FIG. 2, and includes:
  • the terminal device and the circuit switched domain adapter establish a call branch based on circuit switching.
  • the circuit switched domain adapter establishes a packet switching based call branch with a second party under control of a packet switching server.
  • the packet network involved in the embodiment of the present invention may be an IMS network, and the packet switching based call in the IMS network adopts a Session Initial Protocol (SIP) protocol, and the packet switching branch is used.
  • SIP Session Initial Protocol
  • Call branch for SIP protocol SIP Call Leg
  • the circuit switched domain adapter establishes a call connection between the terminal device and the second party by binding the circuit switched based call leg and the packet switched based call leg. Holding the request, the call hold request includes an identity of the third party;
  • the identifier of the third party may be a SIP Uniform Resource Identifier (URI), a Telephone Universal URI (TEL URI), an Internet Protocol (IP) address, A phone number or other identifying information that can identify the user as a user.
  • URI SIP Uniform Resource Identifier
  • TEL URI Telephone Universal URI
  • IP Internet Protocol
  • the specific identification information does not constitute a limitation of the present invention.
  • the call hold request in the embodiment may be carried in an Unstructured Supplementary Service Data Request (USSD Request) message sent by the circuit switched domain adapter to the circuit switched domain adapter.
  • USB Request Unstructured Supplementary Service Data Request
  • the terminal device may have a PS access capability at the same time, and the call hold device may send a call to the circuit switched domain adapter through an existing General Packet Radio Service (GPRS) network.
  • GPRS General Packet Radio Service
  • the request is kept, and the call hold request can be sent by an Invite or Update message.
  • the circuit switched domain adapter sends a call hold request to the second party by using a packet switching server, and the call branch established with the second party is maintained.
  • both parties of the communication can send a call hold request to the other party, and after the other party agrees to maintain, the two parties keep the current call.
  • the call hold request sent by the circuit switched domain adapter to the second party can be carried by the Invite message, and can also be carried by the Update message, where the Invite message or the Update message includes an identifier indicating the second party.
  • the call branch established with the circuit switched domain adapter is maintained, and the packet switching server can give the second party a tone of the voice call hold to notify the second party that the call is held.
  • the accepting and holding party is a circuit switched domain adapter.
  • the circuit switched domain adapter establishes a packet switching based call branch with a third party under the control of the packet switching server;
  • the circuit switched domain adapter establishes a call connection between the terminal device and a third party by binding the circuit switched based call leg and the third party call branch. It can be understood that, after the step 207, the method may further include:
  • the terminal device may further request, to the circuit switched domain adapter, a call recovery with a second party; and send a call resume request with the second party.
  • the circuit switched domain adapter requests the third party to keep the call branch with the third party.
  • step 205 The call branching with step 205 and the third party will remain the same as the call branch of the second party.
  • the circuit switched domain adapter restores a call connection between the terminal device and the second party by binding the call branch established with the terminal device and the establishing a call branch with the second party.
  • the terminal device in this embodiment may continue to request the circuit switching domain adapter to resume the call, thereby implementing call handover between the terminal device and the second party and the third party.
  • Embodiment 2 of the present invention based on the first embodiment, implements a service for providing a call hold by a packet switching network service platform to a circuit switched network terminal device, by reusing a circuit based on the circuit switched domain adapter and the terminal device
  • the switched call leg makes the implementation of the call hold service flow simpler, thereby saving CS network resources and accelerating the setup time of the call connection.
  • a third embodiment of the present invention provides a call control method.
  • the signaling flow chart is as shown in FIG. 3, and includes: 301.
  • a terminal device and a circuit switched domain adapter establish a call branch based on circuit switching.
  • the circuit switched domain adapter establishes a packet switching based call branch with a second party under control of a packet switching server.
  • the circuit switched domain adapter establishes a call connection between the terminal device and the second party by binding the call branch established with the terminal device and the call branch established with the second party.
  • the third direction the packet switching server sends a call request to the terminal device.
  • the call request is an Invite message
  • the Invite message includes an identity identifier of the terminal device.
  • the packet switching server sends the call request to the circuit switched domain adapter. It can be understood that the packet switching server receives the call request and performs initial filtering. Checking the initial filter Criteria (iFC) to check that the call request is to the circuit switched domain terminal device, that is, the call will be established through the circuit switched network, and the call request is routed to the Circuit switched domain adapter.
  • iFC initial filter Criteria
  • the initial filtering criteria is part of the user's subscription information and is the service triggering information.
  • iFC is used to describe what incoming SIP messages are further routed to a particular application server.
  • the SIP message can typically be an Invite message requesting to establish a call or a Register message for IMS registration.
  • the circuit switched domain adapter sends a call request of the third party to the terminal device.
  • the outgoing call request may be sent to the terminal device through a circuit switched network USSD Request message, and may be sent to the terminal device through a packet switched access network.
  • the terminal device sends a response to the call to the circuit switched domain adapter.
  • the response may be sent to the circuit switched domain adapter through a circuit switched network USSD Request message, and may also be grouped.
  • a switched access network is sent to the circuit switched domain adapter.
  • the circuit switched domain adapter receives the response, and sends a call hold request to the second party to maintain the call branch established with the second party.
  • step 205 of the second embodiment For the manner of maintaining the call branch with the second party, refer to step 205 of the second embodiment.
  • the circuit switched domain adapter establishes a packet switching based call branch with a third party under the control of a packet switching server.
  • the circuit switched domain adapter establishes a call connection between the terminal device and a third party by binding the call branch established with the terminal device and the call branch with the third party.
  • the terminal device can request call recovery from the circuit switched domain adapter, so as to implement call switching between the terminal device and the second party and the third party, and the specific switching manner. See steps 208 to 210 in the second embodiment.
  • the circuit switched domain adapter may receive a third party call request in step 304, that is, step 309 circuit switched domain adapter is in the packet switching server. Controlling, by the third party, a step of establishing a packet switching based call branch with a third party, if the terminal device returns a response to receive the third party call, Continuing to step 308; if the terminal device refuses to make a call with a third party, the circuit switched domain adapter may also tear down the call branch with the third party in a subsequent step.
  • the third embodiment of the present invention is different from the second embodiment in that the terminal device receives a call request from a third party during a session with the second party, and if the call request is accepted, the second party Call the connection and establish a call connection with a third party.
  • the call waiting service of the packet switching platform to the circuit switched terminal device is implemented on the basis of reusing the circuit switched based call leg.
  • the fourth embodiment of the present invention provides a method for call control.
  • the signaling flow chart is as shown in FIG. 4, and includes: Step 401 to Step 407 in this embodiment are the same as Steps 201 to Step 207 in Embodiment 2, specifically No longer praising;
  • the terminal device sends a call transfer request to the circuit switched domain adapter.
  • the terminal device sends a call transfer request to the circuit switched domain adapter, and the terminal transfer request may be sent by using a packet switched access network or a circuit switched network.
  • the circuit switched domain adapter sends a call hold request to the third party to maintain the call branch established with the third party.
  • the circuit switched domain adapter sends a call transfer request to the second party, where the call transfer request includes a third party identity identifier;
  • the call forwarding request can be sent through an Invite message.
  • the second party accepts the call transfer request, and returns an acknowledgement message to the circuit switched domain adapter.
  • the confirmation message can be returned by a 200 OK message.
  • the second party establishes a call connection with the third party.
  • the specific second party and the third party can establish a call connection in the conventional manner, which is not described in this embodiment.
  • Steps 410 to 412 are a specific implementation of the circuit switched domain adapter controlling the second party and the third party to establish a call connection. It can be understood that the circuit switched domain adapter controls the second party to establish a call connection with the third party, and can also establish a call connection. The second party and the third party call connection are established by binding the circuit switched domain adapter with the second party's call branch and the third party's call branch, and the specific second party and the third party establish a call connection manner. Limitations of the invention.
  • step 413 after step 411, releasing the circuit switched domain adapter with the second party and a third party Separate packet switching based call branches.
  • the circuit switching domain adapter in the second direction After the call setup of the second party and the third party is successful, the circuit switching domain adapter in the second direction returns a call transfer success message.
  • the USSD Request message includes an identifier indicating that the call forwarding is successful.
  • circuit switched domain adapter can also notify the terminal device of the successful call transfer through the packet switched network.
  • the terminal device releases a call branch with the circuit switched domain adapter after the message of successful call transfer.
  • steps 401 to 407 of this embodiment can also be replaced with steps 301 to 310 of the third embodiment.
  • a method for providing a call forwarding service by the packet switching control platform to the circuit switching terminal device is implemented.
  • a fifth embodiment of the present invention provides a call control method.
  • the signaling flowchart is as shown in FIG. 5, and includes:
  • the terminal device and the circuit switched domain adapter establish a call branch based on circuit switching.
  • the circuit switched domain adapter establishes a packet switching based call branch with a second party under control of a packet switching server.
  • the circuit switched domain adapter establishes a call connection between the terminal device and the second party by binding the call branch established with the terminal device and the call branch established with the second party.
  • the terminal device sends a call transfer request to the circuit switched domain adapter, where the call transfer request carries an identifier of a third party;
  • the terminal device transmitting a call transfer request to the circuit switched domain adapter may be sent over a packet switched access network or a circuit switched network.
  • the circuit switched domain adapter sends a call hold request to the second party to maintain the call branch established with the second party.
  • Steps 506 to 508 are steps for the circuit switched domain adapter to control the second party to establish a call connection with the third party, which is the same as the fourth step 410 to step 412 of the fourth embodiment, and is not further described.
  • the circuit switched domain adaptation releases the packet switched based call branch established with the second party.
  • the circuit switching domain adapter in the second direction After the call setup of the second party and the third party is successful, the circuit switching domain adapter in the second direction returns a call transfer success message.
  • the transfer success message may be sent by using a USSD Request message, where the USSD Request includes an identifier indicating that the call transfer is successful.
  • circuit switched domain adapter can also notify the terminal device of the successful call transfer through the packet switched network.
  • the terminal device releases the circuit-switched call branch established with the circuit switched domain adapter.
  • the three parties establish a call leg, and the terminal device directly sends a call transfer request, and notifies the circuit to exchange the identity of the third party transferred by the domain adapter, and the second party establishes a call transfer with the third party call.
  • Embodiment 6 of the present invention a method for call control, the signaling flow chart is as shown in FIG. 6, and includes:
  • the terminal device and the circuit switched domain adapter establish a call branch based on circuit switching.
  • the circuit switched domain adapter establishes a packet switching based call branch with a second party under control of a packet switching server.
  • the circuit switched domain adapter establishes a call connection between the terminal device and the second party by binding the call branch established with the terminal device and the call branch established with the second party.
  • the second party will send a call hold request with the circuit switched domain adapter to maintain the call leg established with the circuit switched domain adapter.
  • the second direction direction circuit switching domain adapter sends a call transfer request; the call transfer request includes a third party identity identifier.
  • the circuit switched domain adapter establishes a packet switching based call branch with a third party under the control of a packet switching server.
  • the circuit switched domain adapter establishes a call connection between the terminal device and a third party by binding the call branch established with the terminal device and the call branch with the third party.
  • the circuit switched domain adapter interacts with the second party, and the release is established with the second party. Call branch.
  • a call forwarding request is initiated by the second party, the terminal device establishes a call connection with the third party, and the second party exits the call.
  • a packet switching platform is provided to provide passive call forwarding services to circuit switched network terminal equipment.
  • Embodiment 7 is a method for call control, and a signaling flowchart is shown in FIG. 7, which includes:
  • the packet switching server receives a call request to the called terminal device of the circuit switched domain. It can be understood that the packet switching server performs an iFC check to receive the call request, and checks that the call request is going to The circuit switched domain terminal device routes the call to the circuit switched domain adapter.
  • the packet switching server routes the call request to a circuit switched domain adapter.
  • the switching domain adapter requests the called terminal device to establish a circuit switched based call branch.
  • the request to specifically establish a call branch based on circuit switching may include one of the following:
  • the circuit switched domain adapter sends an Invite message to the Media Gateway Controller; the Media Gateway sends an Initial Address (IAM) message to a Mobile Switching Center (MSC) serving the called terminal device;
  • IAM Initial Address
  • MSC Mobile Switching Center
  • the mobile switching center sends a call setup message to the called terminal device.
  • the embodiment emphasizes that the circuit switched domain adapter can send the call request of the calling party to the called terminal device through the circuit switched network, in the process, the specific sent message and the path of the message transmission.
  • the specific path of passing messages and messaging does not constitute a limitation of the present invention.
  • the packet switched domain server establishes a call of an initiator of the call request and a forward target party of the called terminal device.
  • the preset triggering condition may include any one or a combination of the following four points:
  • the packet switching server receives the message that the called terminal device returns a busy line indicating that the called terminal device is busy through the circuit switched domain adapter.
  • the called user terminal device busy line may be a message that the called terminal device returns the called terminal device busy line after the called terminal device receives the call setup request, and the user rejects the call by operation;
  • the MSC detects that the called terminal device is talking, and directly returns a message indicating that the called busy line is busy.
  • the packet switching server receives the forward request message returned by the called terminal device through the circuit switched domain adapter, where the forward request message includes the identity of the forward target party.
  • the user may send, by the called terminal, a request for forwarding the current call to the packet switching server, and the packet switching server performs forwarding according to the forward target specified by the called terminal device.
  • the circuit-switching server does not receive the temporary response message to the call request returned by the called terminal device through the circuit-switched domain adapter within a preset time period, that is, the called terminal device cannot communicate.
  • the circuit-switched server does not receive a response message from the called terminal device to accept the call returned by the circuit-switched domain adapter within a preset duration.
  • triggering condition of the forwarding can be set according to the specific situation and the implementation of the service.
  • the specific forwarding triggering conditions do not constitute a limitation of the present invention.
  • the seventh embodiment of the present invention implements the forward-switching service support of the packet-switched network platform to the called terminal equipment of the circuit-switched network, and the centralized control of the packet-switched network of the forward-switched service, so that the evolution from the circuit-switched network to the packet-switched network is reduced.
  • the cost of network construction saves network resources.
  • Embodiment 8 is a circuit switched domain adapter 800, comprising: a circuit call branch establishing unit 810 and a call proxy unit 820.
  • circuit call branch establishing unit 810 configured to establish a circuit switching based call branch with the terminal device
  • the call proxy unit 820 is configured to establish a packet switching based call connection with the terminal device under the control of the packet switching server.
  • the peer may be a second party or a third party as described in Embodiment 1 to Embodiment 7, and may specifically be a communication device that communicates with the terminal device, such as a mobile phone, a computer, a server, or the like.
  • a circuit switched domain adapter 900 includes: a circuit call branch establishing unit 910 and a call proxy unit 920.
  • the control information forwarding unit 930 is further included.
  • the call proxy unit 920 includes: a packet call branch establishing unit 921; a call branch binding unit 922.
  • the circuit call branch establishment unit 910 is configured to establish a circuit switching based call branch with the terminal device; and the call proxy unit 920 is configured to proxy the terminal device to establish a packet switching based call connection with the second party in the packet switching domain.
  • a packet call branch establishing unit 921 configured to establish a packet switching based call branch with the second party under the control of the packet switching server;
  • the call branch binding unit 922 is configured to bind the call branch established with the terminal device and the call branch established with the opposite end to establish a call connection between the terminal device and the second party.
  • the control information forwarding unit 930 is configured to receive control information of the terminal device, and forward the control information of the terminal device to the second party by using a packet switching-based call branch established by the packet call branch establishing unit 921. .
  • circuit-switched domain adapter 900 The specific implementation process of the functions and functions of each unit in the circuit-switched domain adapter 900 is described in the implementation process of the corresponding steps in the foregoing method, and is not mentioned here.
  • Embodiment 10 a terminal device 1000, comprising: a circuit call branch establishing unit 1010, a control information generating unit 1020, a control information sending unit 1030, and a call removing unit 1040;
  • the circuit call branch establishing unit 1010 configured to establish a circuit switching based call branch with the circuit switched domain adapter
  • the control information generating unit 1020 is configured to generate call control information to the circuit switched domain adapter after the circuit switching based call branch is established;
  • the control information sending unit 1030 is configured to use the call removal unit 1040 generated by the control information generating unit 1020 to receive a call teardown request of the circuit switched domain adapter; and remove the circuit call branch establishing unit 1010. Established circuit-switched call branch.
  • a call exchange based call is established between the terminal device and the circuit switched domain adapter, and a second party is used to establish a packet switching based call connection, so that the packet switching network control platform performs circuit switching. Call control of the terminal device.
  • the call control function of the circuit-switched network is abandoned, and the packet switching server provides call control services for the terminal equipment of the circuit-switched domain, which centralizes the entire network control function, reduces the cost of network operation, and makes the implementation of new services easier to implement.
  • the present invention implements a packet switching network service platform to provide supplementary services such as call hold, call waiting, and call forwarding to a circuit switched network terminal device, and based on a circuit between the circuit switched domain adapter and the terminal device
  • the switched call leg makes the implementation of the second call connection simpler, thereby saving CS network resources and accelerating the setup time of the call connection.
  • the embodiment of the present invention implements the support of the packet switching network platform for the forwarded service of the called terminal equipment of the circuit switched network, and the centralized control of the packet switching network of the forwarding service enables the evolution from the circuit switched network to the packet switched network. Save the cost of network construction and save network resources.
  • the description of the examples is only for helping to understand the method of the present invention and its main idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scopes. The description is not to be construed as limiting the invention.

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  • Mobile Radio Communication Systems (AREA)
  • Telephone Function (AREA)

Description

呼叫控制的方法、 电路交换域适配器及终端设备 本申请要求于 2007 年 4 月 6 日提交中国专利局、 申请号为 200710090412.9、 发明名称为"呼叫控制的方法及电路交换域适配器及终端设 备"的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，具体涉及呼叫控制的方法及电路交换域适配器 及终端设备。
背景技术
目前， 移动通信网络以电路交换（Circuit-Switched, CS )为主， 包括全球 移动通信系统（Global System for Mobile Communications, GSM ), 码分多址 接入（ Code Division Multiple Access, CDMA )等。 各运营商基于 CS网络建 立了比较完善和丰富的业务平台， 其中 MSC (移动交换中心） 负责呼叫路由 和业务逻辑执行， 如呼叫前转业务， 呼叫保持业务等等。
CS网络的业务提供需要漫游地移动交换中心 （Mobile Switching Centre, MSC ) 的支持， 对于新业务的引入不利。 IP 多媒体子系统 （IP Multimedia Sub-system, IMS )是基于分组交换的业务网络， 其业务提供与漫游地无关， 有利于新的多媒体业务的引入。 IMS支持 UE通过各种分组交换接入网， 进行 基于分组交换的 IMS多媒体业务。
基于分组交换 ( Package- Switched, PS )的 IMS网络是通信网络未来的发 展趋势， 但是 IMS网络也是一个比较复杂的网络， 可以预见， 基于分组交换 的 IMS网络的全面部署不会短时间完成， 同时， 不可能所有的 CS网络用户短 时间更换新的 IMS终端， CS网络将会在较长的一段时间内与 IMS网络共存， 因此需要 CS网络与 IMS网络的同时运营。
现有的实现网络共存的技术为通过特定的网^矣口， 实现 CS网络与 IMS 网络的互通， 如引入媒体网关控制器（Media Gateway Controller , MGC )进 行两个网络不同呼叫协议的转换。 媒体网关控制器为实现媒体网关控制功能 ( Media Gateway Control Function , MGCF ) 的逻辑功能实体。
现有的技术可以实现 CS网络与 IMS网络的通信但是却存在以下问题： 在 CS网络中， CS业务控制平台为 CS用户提供业务服务， 在分组交换网 络中， 是 IMS业务控制平台为 IMS用户提供业务服务， 两个网络的业务控制 平台同时运营， 大大增加了运营的成本， 并且在推行新业务时， 需要在 CS业 务控制平台与 IMS业务控制平台同时进行配置与更新， 给新业务的推行带来 困难。
发明内容
本发明实施例在于提供一种呼叫控制的方法、电路交换域适配器及终端设 备， 以实现分组交换网控制平台对电路交换终端设备的呼叫控制。
为此， 本发明实施例提供的一种呼叫控制的方法， 包括：
与终端设备建立基于电路交换的呼叫分支；
与第二方建立基于分组交换的呼叫分支；
通过绑定所述基于电路交换的呼叫分支和所述基于分组交换的呼叫分支 建立所述终端设备与第二方的呼叫连接。
本发明实施例提供的一种呼叫控制的方法， 包括：
分组交换服务器接收发送给电路交换域被叫终端设备的呼叫请求； 将所述呼叫请求路由到电路交换域适配器；
所述电路交换域适配器向所述被叫终端设备请求建立基于电路交换的呼 叫分支；
当所述分组交换服务器通过电路交换域适配器接收到被叫终端设备返回 的消息满足预置的触发条件时，建立所述呼叫请求的发起方与所述被叫终端设 备的前转目标方的呼叫。
本发明实施例提供的一种电路交换域适配器， 包括：
电路呼叫分支建立单元， 用于与终端设备建立基于电路交换的呼叫分支； 分组呼叫分支建立单元， 用于与第二方建立基于分组交换的呼叫分支； 呼叫分支绑定单元，用于绑定所述基于电路交换的呼叫分支和所述基于分 组交换的呼叫分支， 建立所述终端设备与所述第二方的呼叫连接。
本发明实施例提供的一种终端设备， 包括：
电路呼叫分支建立单元，用于与电路交换域适配器建立基于电路交换的呼 叫分支；
控制信息生成单元， 用于在所述基于电路交换的呼叫分支建立后， 生成去 往所述电路交换域适配器的呼叫控制信息；
控制信息发送单元，用于将所述控制消息生成单元生成的呼叫控制信息通 过分组交换接入网或电路交换网发送给电路交换域适配器。
由上述技术方案可知，本发明实施例通过与终端设备建立基于电路交换的 呼叫分支；在分组交换服务器的控制下建立所述终端设备与第二方建立基于分 组交换的呼叫连接 , 实现分组交换网控制平台对电路交换终端设备的呼叫控 制。放弃了电路交换网的呼叫控制功能， 由分组交换服务器为电路交换域的终 端设备提供呼叫控制服务，使整个网络控制功能集中化，降低网络运营的成本， 并且使新业务的推行更加容易实现。
附图说明
图 1是本发明实施例一呼叫控制的方法的流程图；
图 2是本发明实施例二呼叫控制的方法的流程图；
图 3是本发明实施例三呼叫控制的方法的流程图；
图 4是本发明实施例四呼叫控制的方法的流程图；
图 5是本发明实施例五呼叫控制的方法的流程图；
图 6是本发明实施例六呼叫控制的方法的流程图；
图 7是本发明实施例七呼叫控制的方法的流程图；
图 8是本发明实施例八电路交换域适配器的逻辑结构示意图；
图 9是本发明实施例九电路交换域适配器的逻辑结构示意图；
图 10是本发明实施例十终端设备的逻辑结构示意图。
具体实施方式
下面对本发明实施例提供的呼叫控制的方法及电路交换域适配器及终端 设备进行伴细描述。
实施例一， 一种呼叫控制的方法， 流程图如图 1所示， 包括：
101 , 终端设备与电路交换域适配器（Circuit-Switched domain Adaptor,
CSA )建立基于电路交换的呼叫分支（CS Call Leg );
可以理解的是， 所述终端设备可以是基于电路交换进行通信的网络设备， 例如： 可以是移动电话、 固定电话、 网络计算机或服务器等等。
102, 所述电路交换域适配器与第二方建立基于分组交换的呼叫分支； 103 , 所述电路交换域适配器通过绑定所述基于电路交换的呼叫分支和所 述基于分组交换的呼叫分支建立所述终端设备与第二方的呼叫连接。
其中， 步骤 102和 103 可以理解为： 所述电路交换域适配器代理所述终 端设备在分组交换服务器的控制下与第二方建立基于分组交换的呼叫连接。
可以理解的是，所述分组交换服务器是分组交换网中用于进行呼叫控制的 功能实体，具体可以为：电话应用服务器（Telephone Application Server , TAS )， 呼叫服务器控制功能（Call Server Control Function, CSCF )服务器等等。
可以理解的是， 所述分组交换服务器可以是 IMS 网络用于进行呼叫控制 的功能实体。
本实施例中，所述电路交换域适配器在分组交换服务器的控制下与第二方 建立基于分组交换的呼叫分支；
可以理解的是， 所述电路交换域适配器作为所述终端设备在 PS网络中的 代理与第二方建立呼叫，所述分组交换服务器通过所述电路交换域适配器的代 理为用户提供呼叫控制服务。
本发明实施例一通过终端设备与电路交换域适配器建立基于电路交换的 下与第二方建立基于分组交换的呼叫连接，实现分组交换网控制平台对电路交 换终端设备的呼叫控制。放弃了电路交换网的呼叫控制功能， 由分组交换服务 器为电路交换域的终端设备提供呼叫控制服务， 使整个网络控制功能集中化， 降低网络运营的成本， 并且使新业务的推行更加容易实现。
本发明实施例二， 一种呼叫控制的方法， 信令流程图如图 2所示， 包括：
201 , 终端设备与电路交换域适配器建立基于电路交换的呼叫分支；
202, 所述电路交换域适配器在分组交换服务器的控制下与第二方建立基 于分组交换的呼叫分支；
可以理解的是，本发明实施例中涉及的分组网络可以是 IMS网络，在 IMS 网络中基于分组交换的呼叫采用 舌初始协议 ( Session Initial Protocol, SIP ) 协议， 所述给基于分组交换的呼叫分支为 SIP协议呼叫分支（ SIP Call Leg )
203 , 所述电路交换域适配器通过绑定所述基于电路交换的呼叫分支和基 于分组交换的呼叫分支建立所述终端设备与所述第二方的呼叫连接。 持请求 , 所述呼叫保持请求包含所述第三方的身份标识；
所述第三方的身份标识可以是所述第三方的 SIP 通用资源标识符 ( Uniform Resource Identifier, URI )、 电话通用资源标识符（ Telephone URI， Tel URI )、 互联网协议（Internet Protocol, IP )地址、 电话号码或其他可以用 户标识用户身份的标识信息。 具体的标识信息不构成对本发明的限制。
本实施例中所述呼叫保持请求可以通过电路交换网向所述电路交换域适 配器发送的非结构化补充业务数据请求（Unstructured Supplementary Service Data Request, USSD Request ) 消息中携带。
可以理解的是， 所述终端设备可能同时具有 PS接入能力， 所述呼叫保持 端设备可以通过现有的通用分组无线业务（ General Packet Radio Service， GPRS ) 网络向所述电路交换域适配器发送呼叫保持请求， 所述呼叫保持请求 可以通过邀请 ( Invite )或更新 ( Update ) 消息发送。
205 , 所述电路交换域适配器通过分组交换服务器向所述第二方发送呼叫 保持请求， 将所述与第二方建立的呼叫分支保持。
可以理解的是， 通信的双方都可以向对方发送呼叫保持请求，对方同意保 持后， 则双方保持当前呼叫。
可以理解的是，所述电路交换域适配器向所述第二方发送的呼叫保持请求 可以通过 Invite消息携带， 还可以通过 Update消息携带， 所述 Invite消息或 Update消息中包含标识，指示第二方将所述与电路交换域适配器建立的呼叫分 支保持， 同时所述分组交换服务器可以给所述第二方放音呼叫保持的提示音， 通知第二方用户呼叫被保持。所述保持为接受保持方保持与发送保持请求方的 呼叫状态， 但停止发送数据， 本实施例中， 所述接受保持方为用户终端， 所述 发送保持请求方为电路交换域适配器。
206, 所述电路交换域适配器在分组交换服务器的控制下与第三方建立基 于分组交换的呼叫分支；
207, 所述电路交换域适配器通过绑定所述基于电路交换的呼叫分支和所 述与第三方的呼叫分支建立所述终端设备与第三方的呼叫连接。 可以理解的是， 所述步骤 207之后， 还可以包括：
208 , 所述终端设备还可以向所述电路交换域适配器请求与第二方的呼叫 恢复； 器发送与第二方的呼叫恢复请求。
209, 电路交换域适配器向所述第三方请求保持所述与第三方建立呼叫分 支；
所述保持与第三方的呼叫分支与步骤 205 将与第二方的呼叫分支保持方 式相同。
210, 所述电路交换域适配器通过绑定所述与终端设备建立的呼叫分支和 所述与第二方建立呼叫分支恢复所述终端设备与所述第二方的呼叫连接。
可以理解的是，本实施例所述终端设备可以继续向所述电路交换域适配器 请求恢复呼叫 ,从而实现所述终端设备与所述第二方和所述第三方之间的通话 切换。
本发明实施例二在实施例一的基础上，实现了分组交换网业务平台向电路 交换网终端设备提供呼叫保持的业务，通过重用所述电路交换域适配器与所述 终端设备之间的基于电路交换的呼叫分支使呼叫保持业务流程的实现更加简 单， 从而节约 CS网络资源和加快呼叫连接的建立时间。
本发明实施例三， 一种呼叫控制的方法， 信令流程图如图 3所示， 包括： 301 , 终端设备与电路交换域适配器建立基于电路交换的呼叫分支；
302, 所述电路交换域适配器在分组交换服务器的控制下与第二方建立基 于分组交换的呼叫分支；
303 , 所述电路交换域适配器通过绑定所述与终端设备建立的呼叫分支和 所述与第二方建立的呼叫分支， 建立所述终端设备与所述第二方的呼叫连接。
304, 第三方向所述分组交换服务器发送去往所述终端设备的呼叫请求； 本实施例中 , 所述呼叫请求为 Invite消息 , 所述 Invite消息包含所述终端 设备的身份标识。
305 ,所述分组交换服务器将所述呼叫请求发送给所述电路交换域适配器。 可以理解的是， 所述分组交换服务器收到所述呼叫请求，进行初始过滤标 准（ initial Filter Criteria, iFC ) 的检查， 检查出所述呼叫请求是去往电路交换 域终端设备的，也就是说所述呼叫将通过电路交换网络建立， 则将所述呼叫请 求路由到所述电路交换域适配器。
初始过滤标准是用户签约信息的一部分， 是服务触发信息。 iFC用来描述 到来的 SIP消息什么条件下被进一步路由到一个特定的应用服务器。 所述 SIP 消息通常可以是请求建立呼叫的 Invite 消息或者进行 IMS 注册的注册 ( Register ) 消息。
306， 所述电路交换域适配器将所述第三方的呼叫请求下发给所述终端设 备。
本实施例中， 所述下发呼叫请求可以通过电路交换网络 USSD Request消 息下发给所述终端设备， 还可以通过分组交换接入网下发给所述终端设备。
307, 所述终端设备向所述电路交换域适配器发送接受所述呼叫的应答； 本实施例中， 所述应答可以通过电路交换网络 USSD Request消息发送给 所述电路交换域适配器，还可以通过分组交换接入网发送给所述电路交换域适 配器。
308, 所述电路交换域适配器收到所述应答， 向所述第二方发送呼叫保持 请求， 保持所述与第二方建立的呼叫分支；
保持与所述第二方的呼叫分支的方式参见与实施例二步骤 205。
309, 所述电路交换域适配器在分组交换服务器的控制下与第三方建立基 于分组交换的呼叫分支；
310， 所述电路交换域适配器通过绑定所述与终端设备建立的呼叫分支和 所述与第三方的呼叫分支建立所述终端设备与第三方的呼叫连接。
可以理解的是， 步骤 310之后， 所述终端设备可以向电路交换域适配器请 求呼叫恢复，从而实现所述终端设备与所述第二方和所述第三方之间的通话切 换， 具体的切换方式参见实施例二中的步骤 208 ~步骤 210。
可以理解的是， 步骤 309与步骤 305至步骤 308并无绝对顺序，也可以在 步骤 304所述电路交换域适配器收到第三方的呼叫请求，即进行步骤 309电路 交换域适配器在分组交换服务器的控制下与第三方建立基于分组交换的呼叫 分支的步骤， 若所述步骤 307， 终端设备返回接收所述第三方呼叫的应答， 则 继续步骤 308; 若所述终端设备拒绝与第三方进行通话， 则也可以在后续的步 骤中电路交换域适配器拆除与所述第三方的呼叫分支。
本发明实施例三与实施例二的区别在于，所述终端设备在与第二方进行会 话的过程中， 收到第三方的呼叫请求， 若接受所述呼叫请求， 则保持与第二方 的呼叫连接， 建立与第三方的呼叫连接。在重用基于电路交换的呼叫支路的基 础上实现了分组交换平台对电路交换终端设备的呼叫等待业务。
本发明实施例四， 一种呼叫控制的方法， 信令流程图如图 4所示， 包括： 本实施例步骤 401至步骤 407与实施例二步骤 201至步骤 207相同 ,具体 现上述， 在此不再赞述；
408, 所述终端设备向所述电路交换域适配器发送呼叫转移请求； 所述终端设备向电路交换域适配器发送呼叫转移请求可以通过分组交换 接入网或电路交换网发送。
409, 电路交换域适配器向所述第三方发送呼叫保持请求， 将所述与第三 方建立的呼叫分支保持；
410, 电路交换域适配器向所述第二方发送呼叫转移请求， 所述呼叫转移 请求包含第三方的身份标识；
所述呼叫转起请求可以通过 Invite消息发送。
411 , 所述第二方接受所述呼叫转移请求， 向所述电路交换域适配器返回 确认消息。
所述确认消息可以通过 200OK消息返回。
412, 所述第二方与所述第三方建立呼叫连接。
具体第二方与所述第三方可以采用现有的常规方式建立呼叫连接，本实施 例不再赘述。
步骤 410至步骤 412是电路交换域适配器控制第二方和第三方建立呼叫连 接的一种具体实现，可以理解的是， 所述电路交换域适配器控制第二方和第三 方建立呼叫连接，还可以通过绑定所述电路交换域适配器与第二方的呼叫分支 和与第三方的呼叫分支实现第二方与第三方呼叫连接的建立，具体第二方和第 三方建立呼叫连接的方式不构成对本发明的限制。
413， 步骤 411之后， 释放所述电路交换域适配器与所述第二方和第三方 分别建立的基于分组交换的呼叫分支。
414， 所述第二方与所述第三方的呼叫建立成功后， 所述第二方向所述电 路交换域适配器返回呼叫转移成功消息。 USSD Request消息， 所述 US SD Request消息中包含指示所述呼叫转移成功的 标识。
可以理解的是，所述电路交换域适配器还可以通过分组交换网将所述呼叫 转移成功的消息通知给所述终端设备。
416， 所述终端设备在呼叫转移成功的消息后， 释放与所述电路交换域适 配器的呼叫分支。
可以理解的是，本实施例步骤 401至步骤 407还可以替换为实施例三的步 骤 301至步骤 310。
本发明实施例四，在实施例二或实施例三的方法的基础上， 实现了一种分 组交换控制平台对所述电路交换终端设备提供呼叫转移业务的方法。
本发明实施例五， 一种呼叫控制的方法， 信令流程图如图 5所示， 包括：
501 , 终端设备与电路交换域适配器建立基于电路交换的呼叫分支；
502, 所述电路交换域适配器在分组交换服务器的控制下与第二方建立基 于分组交换的呼叫分支；
503 , 所述电路交换域适配器通过绑定所述与终端设备建立的呼叫分支和 所述与第二方建立的呼叫分支建立所述终端设备与所述第二方的呼叫连接。
504, 所述终端设备向所述电路交换域适配器发送呼叫转移请求， 所述呼 叫转移请求中携带第三方的身份标识；
所述终端设备向电路交换域适配器发送呼叫转移请求可以通过分组交换 接入网或电路交换网发送。
505 , 所述电路交换域适配器向所述第二方发送呼叫保持请求， 将所述与 第二方建立的呼叫分支保持；
步骤 506至步骤 508为所述电路交换域适配器控制第二方与第三方建立呼 叫连接的步骤， 与实施例四步骤 410至步骤 412相同， 不再赞述。
509, 所述第二方返回接受呼叫转移的确认消息后， 所述电路交换域适配 器释放与所述第二方建立的基于分组交换的呼叫分支。
510, 所述第二方与所述第三方的呼叫建立成功后， 所述第二方向所述电 路交换域适配器返回呼叫转移成功消息。 转移成功消息， 所述呼叫转移成功消息可以通过 USSD Request消息发送， 所 述中 USSD Request包含指示所述呼叫转移成功的标识。
可以理解的是，所述电路交换域适配器还可以通过分组交换网将所述呼叫 转移成功的消息通知给所述终端设备。
512, 所述终端设备在呼叫转移成功的消息后， 释放与所述电路交换域适 配器建立的基于电路交换的呼叫分支。 三方建立呼叫支路， 由所述终端设备直接发送呼叫转移请求， 并通知所述电路 交换域适配器转移的第三方的身份标识，所述第二方建立与第三方的呼叫实现 呼叫转移。
本发明实施例六， 一种呼叫控制的方法， 信令流程图如图 6所示， 包括：
601 , 终端设备与电路交换域适配器建立基于电路交换的呼叫分支；
602, 所述电路交换域适配器在分组交换服务器的控制下与第二方建立基 于分组交换的呼叫分支；
603 , 所述电路交换域适配器通过绑定所述与终端设备建立的呼叫分支和 所述与第二方建立的呼叫分支建立所述终端设备与所述第二方的呼叫连接。
604, 所述第二方将与电路交换域适配器发送呼叫保持请求， 将所述与电 路交换域适配器建立的呼叫分支保持。
605 , 所述第二方向所述电路交换域适配器发送呼叫转移请求； 所述呼叫 转移请求包含第三方的身份标识。
606, 所述电路交换域适配器在分组交换服务器的控制下与第三方建立基 于分组交换的呼叫分支；
607 所述电路交换域适配器通过绑定所述与终端设备建立的呼叫分支和 所述与第三方的呼叫分支建立所述终端设备与第三方的呼叫连接。
608 , 所述电路交换域适配器与所述第二方交互， 释放与所述第二方建立 的呼叫分支。
本发明实施例六通过第二方发起呼叫转移请求，所述终端设备与第三方建 立呼叫连接， 第二方退出呼叫。 实现了分组交换平台对电路交换网终端设备提 供被动的呼叫转移服务。
实施例七， 一种呼叫控制的方法， 信令流程图如图 7所示， 包括：
701 , 分组交换服务器接收去往电路交换域被叫终端设备的呼叫请求； 可以理解的是，所述分组交换服务器向收到所述呼叫请求，进行 iFC检查， 检查出所述呼叫请求是去往电路交换域终端设备的 ,则将所述呼叫路由到电路 交换域适配器。
702, 分组交换服务器将所述呼叫请求路由到电路交换域适配器；
703 , 交换域适配器向所述被叫终端设备请求建立基于电路交换的呼叫分 支；
具体建立基于电路交换的呼叫分支的请求可以包括下述之一：
所述电路交换域适配器向媒体网关控制器发送邀请 ( Invite ) 消息； 所述媒体网关器向为所述被叫终端设备服务的移动交换中心（MSC )发送 初始地址（IAM ) 消息；
所述移动交换中心向所述被叫终端设备发送呼叫建立 （setup ) 消息。 可以理解的是，本实施例强调的是所述电路交换域适配器可以将主叫方的 呼叫请求通过电路交换网络发送给被叫终端设备，在此过程中，具体发送的消 息和消息传递的路径有多种实现方式，具体的传递消息和消息传递的路径不构 成对本发明的限制。
704, 满足预置的触发条件； 所述分组交换域服务器建立所述呼叫请求的 发起方与所述被叫终端设备的前转目标方的呼叫。
本发明实施例中，所述预置的触发条件可以包括以下四点中的任意一点或 多点的组合：
―.所述分组交换服务器收到所述被叫终端设备通过电路交换域适配器返 回指示被叫终端设备忙线的消息。
可以理解的是，所述被叫用户终端设备忙线可以是所述被叫终端设备收到 所述呼叫建立请求后，用户通过操作拒绝通话，返回被叫终端设备忙线的消息； 也可以是 MSC收到所述呼叫请求后， 检测得知所述被叫终端设备正在通话， 则直接返回指示被叫忙线的消息。
二.所述分组交换服务器收到所述被叫终端设备通过电路交换域适配器返 回的前转请求消息， 所述前转请求消息中包含前转目标方的身份标识。
用户可以通过所述被叫终端发送将本次呼叫前转的请求给所述分组交换 服务器， 所述分组交换服务器根据所述被叫终端设备指定的前转目标进行前 转。
三.所述电路交换服务器在预置的时长内未收到所述被叫终端设备通过所 述电路交换域适配器返回的对所述呼叫请求的临时响应消息 ,即无法被叫终端 设备进行通信。
四.所述电路交换服务器在预置的时长内未收到所述被叫终端设备通过所 述电路交换域适配器返回的接受呼叫的应答消息。
以上提出四种进行呼叫前转的触发条件，可以理解的是，前转的触发条件 可以根据具体情况与业务的实现自行设定，具体的前转触发条件不构成对本发 明的限定。
本发明实施例七实现了分组交换网络平台对电路交换网被叫终端设备的 前转业务支持，通过前转业务的分组交换网络集中控制，使从电路交换网络向 分组交换网演进过程中， 降低网络建设的成本， 节约网络资源。
实施例八，一种电路交换域适配器 800， 包括： 电路呼叫分支建立单元 810 和呼叫代理单元 820。
电路呼叫分支建立单元 810， 用于与终端设备建立基于电路交换的呼叫分 支；
呼叫代理单元 820， 用于在分组交换服务器的控制下与所述终端设备建立 基于分组交换的呼叫连接。
所述对端可以实施例一至实施例七中所述的第二方或第三方，具体的可以 是与所述终端设备进行通信的通信设备， 如： 移动电话、 计算机、 服务器等。
实施例九，一种电路交换域适配器 900， 包括： 电路呼叫分支建立单元 910 和呼叫代理单元 920， 优选的， 还可以包括控制信息转发单元 930。 所述呼叫 代理单元 920包括： 分组呼叫分支建立单元 921 ; 呼叫分支绑定单元 922。 电路呼叫分支建立单 910, 用于与终端设备建立基于电路交换的呼叫分 支； 呼叫代理单元 920， 用于代理所述终端设备在分组交换域中与第二方建立 基于分组交换的呼叫连接。
分组呼叫分支建立单元 921 , 用于在分组交换服务器的控制下与第二方建 立基于分组交换的呼叫分支；
呼叫分支绑定单元 922， 用于绑定所述与终端设备建立的呼叫分支和所述 与对端建立的呼叫分支建立所述终端设备与所述第二方的呼叫连接。
所述控制信息转发单元 930, 用于接收所述终端设备的控制信息， 并通过 所述分组呼叫分支建立单元 921 建立的基于分组交换的呼叫分支将所述终端 设备的控制信息转发到第二方。
所述电路交换域适配器 900 中的各个单元的功能和作用的具体实现过程 详见上述方法中对应步骤的实现过程， 在此不再赞述。
实施例十， 一种终端设备 1000, 包括： 电路呼叫分支建立单元 1010、 控 制信息生成单元 1020、 控制信息发送单元 1030和呼叫拆除单元 1040;
所述电路呼叫分支建立单元 1010， , 用于与电路交换域适配器建立基于电 路交换的呼叫分支；
所述控制信息生成单元 1020， 用于在所述基于电路交换的呼叫分支建立 后， 生成去往所述电路交换域适配器的呼叫控制信息；
所述控制信息发送单元 1030, 用于将所述控制信息生成单元 1020生成的 所述呼叫拆除单元 1040， 用于接收所述电路交换域适配器的呼叫拆除请 求； 拆除所述电路呼叫分支建立单元 1010建立的基于电路交换的呼叫分支。
上述设备中的各个单元的功能和作用的具体实现过程详见上述方法中对 应步骤的实现过程， 在此不再赞述。
以上对本发明实施例所提供的呼叫控制的方法及电路交换域适配器及终 端设备进行了详细介绍， 其中：
本发明实施例通过终端设备与电路交换域适配器建立基于电路交换的呼 与第二方建立基于分组交换的呼叫连接，实现分组交换网控制平台对电路交换 终端设备的呼叫控制。放弃了电路交换网的呼叫控制功能， 由分组交换服务器 为电路交换域的终端设备提供呼叫控制服务，使整个网络控制功能集中化， 降 低网络运营的成本， 并且使新业务的推行更加容易实现。
进一步，本发明实现了分组交换网业务平台向电路交换网终端设备提供呼 叫保持、 呼叫等待、呼叫转移等补充业务， 并在通过重用所述电路交换域适配 器与所述终端设备之间的基于电路交换的呼叫分支使第二呼叫连接的实现更 加简单， 从而节约 CS网络资源和加快呼叫连接的建立时间。
同时，本发明实施例实现了分组交换网络平台对电路交换网被叫终端设备 前转业务的支持，通过前转业务的分组交换网络集中控制，使从电路交换网络 向分组交换网演进过程中， 节约网络建设的成本， 节约网络资源。 例的说明只是用于帮助理解本发明的方法及其主要思想； 同时，对于本领域的 一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变 之处， 综上所述， 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要 求
1. 一种呼叫控制的方法， 其特征在于， 包括：
与终端设备建立基于电路交换的呼叫分支；
与第二方建立基于分组交换的呼叫分支；
通过绑定所述基于电路交换的呼叫分支和所述基于分组交换的呼叫分支 建立所述终端设备与第二方的呼叫连接。
2. 如权利要求 1所述的呼叫控制的方法， 其特征在于， 所述呼叫连接建 立后还包括：
接收所述终端设备发送的呼叫保持请求，
接收所述终端设备发送的包括第三方身份标识的呼叫请求；
保持所述与第二方建立基于分组交换的呼叫分支；
建立所述终端设备与第三方基于分组交换的呼叫分支；
通过绑定所述基于电路交换的呼叫分支和所述与第三方的呼叫分支建立 所述终端设备与第三方的呼叫连接。
3. 如权利要求 2所述的呼叫控制的方法， 其特征在于， 通过分组交换接 入网或电路交换网接收所述终端设备发送的呼叫保持请求或包括第三方身份 标识的呼叫请求。
4. 如权利要求 2所述的呼叫控制的方法， 其特征在于， 所述呼叫连接建 立后还包括：
通过分组交换服务器收到第三方发送给所述终端设备的呼叫请求； 将所述第三方的呼叫请求下发给所述终端设备；
在接收到所述终端设备发送的应答后， 保持所述与第二方建立的呼叫分 支；
在分组交换服务器的控制下与第三方建立基于分组交换的呼叫分支； 通过绑定所述基于电路交换的呼叫分支和所述与第三方的呼叫分支建立 所述终端设备与第三方的呼叫连接。
5. 如权利要求 1至 4任意一项所述的呼叫控制的方法， 其特征在于， 还 包括：
接收所述终端设备发送的呼叫恢复请求； 保持所述与第三方建立的呼叫分支；
通过绑定所述基于电路交换的呼叫分支和所述与第二方的呼叫分支恢复 所述终端设备与所述第二方的呼叫连接。
6. 如权利要求 5所述的呼叫控制的方法， 其特征在于， 所述接收终端设 备发送的呼叫恢复请求包括： 求。 ^
7. 如权利要求 1、 2或 4所述的呼叫控制的方法， 其特征在于， 所述建立 基于分组交换的呼叫分支后， 还包括：
接收所述终端设备发送的呼叫转移请求，所述呼叫转移请求包括第三方的 身份标识；
控制所述第二方和第三方建立呼叫连接。
8. 如权利要求 7所述的呼叫控制的方法， 其特征在于， 所述控制第二方 与第三方建立呼叫连接包括：
向所述第二方发送呼叫转移请求；
所述第二方接受所述呼叫转移请求， 与所述第三方建立呼叫连接。
9. 如权利要求 7所述的呼叫控制的方法， 其特征在于， 所述第二方和第 三方呼叫连接建立成功后， 还包括：
释放与所述终端设备建立基于电路交换的呼叫分支。
10. 如权利要求 7所述的呼叫控制的方法， 其特征在于： 所述接收终端设 备发送的呼叫转移请求包括：
通过分组交换接入网或电路交换网接收所述终端设备 呼叫转移请 求。
11. 如权利要求 7所述的呼叫控制的方法， 其特征在于： 所述控制第二方 与第三方建立呼叫连接之前还包括：
保持所述终端设备与第三方建立的呼叫连接。
12. 如权利要求 7所述的呼叫控制的方法， 其特征在于， 所述控制第二方 与第三方建立呼叫连接之前还包括：
保持所述与第二方建立的呼叫分支。
13. 如权利要求 1所述的呼叫控制的方法， 其特征在于， 还包括： 接收所述第二方发送的呼叫转移请求，所述呼叫转移请求包括第三方的身 份标识；
与第三方建立基于分组交换的呼叫分支；
通过绑定所述基于电路交换的呼叫分支和所述与第三方的呼叫分支建立 所述终端设备与第三方的呼叫连接。
14. 如权利要求 13所述的呼叫控制的方法， 其特征在于， 所述控制第二 方与第三方建立呼叫连接之前还包括：
保持与所述第二方建立的呼叫分支。
15. 一种呼叫控制的方法， 其特征在于， 包括：
分组交换服务器接收发送给电路交换域被叫终端设备的呼叫请求； 将所述呼叫请求路由到电路交换域适配器；
所述电路交换域适配器向所述被叫终端设备请求建立基于电路交换的呼 叫分支；
满足预置的触发条件，建立所述呼叫请求的发起方与所述被叫终端设备的 前转目标方的呼叫。
16. 如权利要求 15所述的呼叫控制的方法， 其特征在于， 所述预置的触 发条至少包括下述一种：
所述被叫终端设备返回的指示被叫终端设备忙线的消息；
所述被叫终端设备返回前转请求消息，所述前转请求消息中包括前转目标 方的身份标识；
所述分组交换服务器在预置的时长内未收到所述被叫终端设备返回对所 述呼叫分支建立请求的临时响应消息；
所述分组交换服务器在预置的时长内未收到所述被叫终端设备返回的接 受呼叫的应答消息。
17. 如权利要求 16所述的呼叫控制的方法， 其特征在于， 所述电路交换 域适配器向所述被叫终端设备请求建立基于电路交换的呼叫分支包括：
所述电路交换域适配器向媒体网关控制器发送邀请消息；
所述媒体网关向为所述被叫终端设备服务器的移动交换中心发送初始地 址消息；
所述移动交换中心向所述被叫终端设备发送呼叫建立消息。
18. 一种电路交换域适配器， 其特征在于， 包括：
电路呼叫分支建立单元， 用于与终端设备建立基于电路交换的呼叫分支； 分组呼叫分支建立单元， 用于与第二方建立基于分组交换的呼叫分支； 呼叫分支绑定单元，用于绑定所述基于电路交换的呼叫分支和所述基于分 组交换的呼叫分支 , 建立所述终端设备与所述第二方的呼叫连接。
19. 如权利要求 18所述的电路交换域适配器， 其特征在于， 还包括： 控制信息转发单元， 用于接收所述终端设备的控制信息， 并通过所述分组 呼叫分支建立单元建立的基于分组交换的呼叫分支，将所述终端设备的控制信 息转发到第二方。
20. 一种终端设备， 其特征在于， 包括：
电路呼叫分支建立单元，用于与电路交换域适配器建立基于电路交换的呼 叫分支；
控制信息生成单元， 用于在所述基于电路交换的呼叫分支建立后， 生成去 往所述电路交换域适配器的呼叫控制信息；
控制信息发送单元，用于将所述控制消息生成单元生成的呼叫控制信息通 过分组交换接入网或电路交换网发送给电路交换域适配器。
21. 如权利要求 20所述的终端设备， 其特征在于， 还包括：
呼叫拆除单元， 用于接收所述电路交换域适配器的呼叫拆除请求，拆除所 述电路呼叫分支建立单元建立的基于电路交换的呼叫分支。
PCT/CN2008/070654 2007-04-06 2008-04-01 Procédé de commande d'appel, adaptateur de domaine à commutation de circuits et dispositif terminal WO2008122235A1 (fr)

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EP08715386A EP2117177B1 (en) 2007-04-06 2008-04-01 Method for controlling call, circuit switched domain adapter and terminal device
KR1020097017359A KR101095421B1 (ko) 2007-04-06 2008-04-01 호 제어 방법, 회선 교환 도메인 어댑터 및 단말 장치
JP2009551095A JP5095759B2 (ja) 2007-04-06 2008-04-01 呼制御方法
ES08715386T ES2395990T3 (es) 2007-04-06 2008-04-01 Método para el control de llamada, adaptador de dominio de conmutación por circuitos y dispositivo terminal
US12/534,278 US20090290576A1 (en) 2007-04-06 2009-08-03 Call control method, circuit-switched domain adapter and terminal device
US13/300,477 US20120063366A1 (en) 2007-04-06 2011-11-18 Method and apparatus for call control in a communications network

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CN200710090412.9 2007-04-06
CN200710090412A CN100592703C (zh) 2007-04-06 2007-04-06 呼叫控制的方法及电路交换域适配器及终端设备

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EP2117177B1 (en) 2012-10-10
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US20090290576A1 (en) 2009-11-26
JP5437435B2 (ja) 2014-03-12
KR101095421B1 (ko) 2011-12-16
JP5095759B2 (ja) 2012-12-12
JP2010521084A (ja) 2010-06-17
JP2012165464A (ja) 2012-08-30
US20120063366A1 (en) 2012-03-15
CN100592703C (zh) 2010-02-24
CN101282277A (zh) 2008-10-08
EP2117177A4 (en) 2010-02-17
EP2117177A1 (en) 2009-11-11

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