WO2014117509A1 - 多cp指定代答控制方法和系统 - Google Patents

多cp指定代答控制方法和系统 Download PDF

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Publication number
WO2014117509A1
WO2014117509A1 PCT/CN2013/082374 CN2013082374W WO2014117509A1 WO 2014117509 A1 WO2014117509 A1 WO 2014117509A1 CN 2013082374 W CN2013082374 W CN 2013082374W WO 2014117509 A1 WO2014117509 A1 WO 2014117509A1
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WO
WIPO (PCT)
Prior art keywords
user terminal
party
pickup
called
calling
Prior art date
Application number
PCT/CN2013/082374
Other languages
English (en)
French (fr)
Inventor
胡录昌
耿恺频
张善锋
李艳霞
王一峰
沈世元
王坚
Original Assignee
中兴通讯股份有限公司
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
Priority claimed from CN201310033761.2A external-priority patent/CN103973912B/zh
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2014117509A1 publication Critical patent/WO2014117509A1/zh

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Classifications

    • 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
    • H04L65/1096—Supplementary features, e.g. call forwarding or call holding
    • 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 communication technologies, and in particular, to a multi-CP (Control Processor) designated pickup control method and system.
  • CP Control Processor
  • the CENTREX (CENTRalized EXchange) service under NGN (Next Generation Network) and IMS (Internet Protocol (IP) Multimedia Subsystem, Internet Protocol Multimedia Subsystem) is to connect the wired and NGN/IMS domains.
  • the wireless access terminals together form a virtual internal communication network.
  • users can talk to each other through short numbers and implement some basic business functions of CENTREX users, such as number display and restriction, call forwarding, call forwarding, and The attendant and so on.
  • the designated pickup service is an important business feature in the CENTREX business, and it has a wide range of applications in the traditional circuit domain. When an extension does not answer incoming calls, it is answered by other extensions in the same user group.
  • the operation mode is that when the unanswered extension rings, the pickup user picks up the access code + the picked up extension. number.
  • the pickup user needs to specify the extension number to be picked up in order to pick up the incoming call of the extension that is ringing.
  • the designated pickup technology is implemented based on a single CP.
  • the number of users carried by a single CP of the application server is limited. When the number of users reaches a certain scale, multiple CPs must be used for load balancing, thereby improving the processing of the service system. ability.
  • the architecture of multiple CPs will inevitably pose a huge challenge to the processing of services, because users are difficult to handle on different CPs when triggering certain services.
  • the specified pickup technology in related technologies is in multiple CPs.
  • the specified pickup function cannot be completed under the architecture. Summary of the invention
  • Embodiments of the present invention provide a multi-CP designated pickup control method and system capable of implementing a designated pickup function under multiple CPs.
  • An embodiment of the present invention provides a multi-control processor CP specifying a pick-up control method, including: The pickup party CP sends a pickup request carrying the called user terminal information to the call distribution module; the call distribution module forwards the pickup request to the called user according to the called user terminal information carried in the pickup request The called party CP corresponding to the terminal;
  • the called party CP queries the current state of the called user terminal according to the called user terminal information carried in the pickup request;
  • the called party CP When the current state of the called user terminal is the ringing state, the called party CP connects the call between the calling user terminal and the pickup user terminal.
  • the sending, by the calling party CP, the call forwarding module sending the pickup request carrying the called user terminal information includes:
  • the pickup party CP receives the pickup request sent by the pickup user terminal and carries the short number of the called user terminal;
  • the calling party CP acquires the called user terminal long number corresponding to the short number of the called user terminal from the service database according to the short number of the called user terminal carried in the pickup request; and the calling party The CP sends a pickup request carrying the long number of the called user terminal to the call distribution module;
  • the call distribution module forwards the pickup request to the called party CP corresponding to the called user terminal according to the called user terminal information carried in the pickup request, including:
  • the call distribution module forwards the pickup request to the called party CP corresponding to the called user terminal according to the called user terminal long number carried in the pickup request;
  • the called party CP queries the current state of the called user terminal according to the long number of the called user terminal carried in the pickup request.
  • the called party CP connects the call between the calling user terminal and the pickup user terminal, including:
  • the pickup party CP acquires the pickup user terminal session initiation protocol, and sends it to the called party CP, which is forwarded by the called party CP to the calling party CP, and then by the master The calling party CP forwards to the calling user terminal;
  • the calling party CP After the calling user terminal receives the pickup user terminal session initiation protocol, the calling party CP receives the calling user terminal session initiation protocol sent by the calling user terminal, and forwards it to the called party CP, and is forwarded by the called party CP. To the pick-up party CP, then the pick-up party CP forwards to the pick-up user terminal.
  • the proxy request includes a pickup user terminal session initiation protocol
  • the pickup party CP acquires a pickup user terminal session initiation protocol, and sends the call to the called party CP, and is forwarded by the called party CP to The calling party CP, and then forwarded by the calling party CP to the calling user terminal, includes:
  • the called party CP acquires a calling code from the called user terminal, and sends a pickup response carrying the calling code to the pickup Square CP;
  • the pickup party CP obtains a pickup user terminal session initiation protocol from the pickup request, and sends an access request carrying the call code and the pickup user terminal session initiation protocol to the called party CP;
  • the called party CP releases the call of the called user terminal according to the calling code in the access request, and sends a call response carrying the session initiation protocol of the pickup user terminal to the calling party.
  • the calling party CP forwards the call response carrying the pickup user terminal session initiation protocol to the calling user terminal.
  • the calling party CP receives the calling user terminal session initiation protocol sent by the calling user terminal, And forwarded to the called party CP, and forwarded by the called party CP to the calling party CP, and then forwarded by the calling party CP to the pickup user terminal, including:
  • the calling party CP After the calling user terminal receives the call response carrying the session initiation protocol of the pickup user terminal, the calling party CP receives the calling party connection response that is sent by the calling user terminal and carries the calling user terminal session initiation protocol. And forwarded to the called party CP;
  • the called party CP forwards the calling party connection response carrying the calling user terminal session initiation protocol to the pickup party CP, and forwards it to the pickup user terminal by the pickup party CP; After the pickup user terminal receives the caller's connection response carrying the calling user terminal session initiation protocol, the pickup party CP receives the pickup party's connection response sent by the pickup user terminal, and forwards the response to the called party. Party CP.
  • the embodiment of the invention further provides a multi-control processor CP designated pickup control system, comprising: a calling party CP, a called party CP, a calling party CP and a call distribution module, wherein:
  • the pickup party CP is configured to: send a pickup request carrying the information of the called user terminal to the call distribution module;
  • the call distribution module is configured to: forward the pickup request to the called party CP corresponding to the called user terminal according to the called user terminal information carried in the pickup request;
  • the called party CP is configured to: query the current state of the called user terminal according to the called user terminal information carried in the pickup request; and connect the calling user when the current state of the called user terminal is the ringing state The call between the terminal and the pickup user terminal.
  • system further includes: a service database; wherein
  • the pick-up party CP is configured to: receive a pick-up request sent by the pick-up user terminal and carry the short number of the called user terminal; according to the short number of the called user terminal carried in the pick-up request, from the service database Obtaining a called user terminal long number corresponding to the short number of the called user terminal; and sending a pickup request carrying the long number of the called user terminal to the call distribution module;
  • the call distribution module is configured to: forward the pickup request to the called party CP corresponding to the called user terminal according to the called user terminal long number carried in the pickup request; and the called party
  • the calling party CP is configured to: query the current state of the called user terminal according to the long number of the called user terminal carried in the pickup request.
  • the calling party CP is further configured to: when the current state of the called user terminal is a ringing state, obtain a pickup user terminal session initiation protocol, and send to the called party CP; After the calling user terminal session initiation protocol sent by the called party CP, forwarding the calling user terminal session initiation protocol to the pickup user terminal;
  • the called party CP is further configured to: after receiving the pickup user terminal session initiation protocol sent by the pickup party CP, forwarding the pickup user terminal session initiation protocol to the calling party CP; After receiving the calling user terminal session initiation protocol sent by the calling party CP, the calling party User terminal session initiation protocol forwarded to the pickup CP;
  • the calling party CP is further configured to: after receiving the pickup user terminal session initiation protocol sent by the called party CP, forwarding the pickup user terminal session initiation protocol to the calling user terminal; After receiving the pickup user terminal session initiation protocol, the calling user terminal receives the calling user terminal session initiation protocol sent by the calling user terminal, and forwards the protocol to the called party CP.
  • the proxy request includes a pickup user terminal session initiation protocol
  • the called party CP is further configured to: when the current state of the called user terminal is a ringing state, acquire a calling code from the called user terminal, and send a pickup response carrying the calling code to Receiving, by the pick-up party CP, an access request that carries the call code and the pick-up user terminal session initiation protocol sent by the pickup party CP, according to the call code in the access request, releasing The call of the called user terminal, and sending a call response carrying the session initiation protocol of the pickup user terminal to the calling party CP;
  • the pickup party CP is further configured to: after receiving the pickup response that is sent by the called party CP and carrying the call code, obtain a pickup user terminal session initiation protocol from the pickup request, and Transmitting, to the called party CP, an access request carrying the calling code and the pickup user terminal session initiation protocol; and the calling party CP is further configured to: receive the carried by the called party CP After the call response to the user terminal session initiation protocol is answered, the call response carrying the pickup user terminal session initiation protocol is forwarded to the calling user terminal.
  • the calling party CP is further configured to: after receiving, by the calling user terminal, the call response carrying the session initiation protocol of the pickup user terminal, receiving the caller sent by the calling user terminal.
  • the calling party of the user terminal session initiation protocol turns on the response and forwards it to the called party
  • the called party CP is further configured to: after receiving the caller's connection response sent by the calling party CP and carrying the calling user terminal session initiation protocol, starting the session with the calling user terminal The calling party's connection response of the protocol is forwarded to the pickup party CP;
  • the pickup party CP is further configured to: after receiving the caller's connection response sent by the called party CP and carrying the calling user terminal session initiation protocol, carrying the calling user terminal session The calling party of the initiation protocol is forwarded to the pickup user terminal; after receiving the response of the calling party carrying the calling user terminal session initiation protocol, the pickup user terminal receives the pickup user terminal The sending pickup party turns on the response and forwards it to the called party CP.
  • the embodiment of the present invention further provides a proxy control processor CP, including:
  • the pickup party CP is configured to: send a pickup request carrying the information of the called user terminal to the call distribution module;
  • the call distribution module forwards the pickup request to the called party CP corresponding to the called user terminal according to the called user terminal information carried in the pickup request; the called party CP according to the The called user terminal information carried in the pickup request, the current state of the called user terminal is queried, and when the current state of the called user terminal is a ringing state, the calling user terminal and the pickup user terminal are connected. The call between.
  • the pickup party CP is configured to: receive a pickup request sent by the pickup user terminal and carry the short number of the called user terminal; and according to the short number of the called user terminal carried in the pickup request, Acquiring, by the service database, the called user terminal long number corresponding to the short number of the called user terminal; and sending, to the call distribution module, a pickup request carrying the long number of the called user terminal.
  • the calling party CP is further configured to: when the current state of the called user terminal is a ringing state, obtain a pick-up user terminal session initiation protocol, and send to the called party CP; After the calling user terminal session initiation protocol sent by the called party CP, forwarding the calling user terminal session initiation protocol to the pickup user terminal;
  • the proxy request includes the pickup user terminal session initiation protocol; and the pickup party CP is further configured to: receive the pickup code carried by the called party CP After the response, the pickup user terminal session initiation protocol is obtained from the pickup request, and an access request carrying the call code and the pickup user terminal session initiation protocol is sent to the called party CP. .
  • the picking party CP is further configured to: after receiving the caller's connection response sent by the called party CP and carrying the calling user terminal session initiation protocol, carrying the calling party The calling party connection response of the user terminal session initiation protocol is forwarded to the pickup user terminal; After receiving the caller's connection response carrying the calling user terminal session initiation protocol, the user terminal receives the pickup party connection response sent by the pickup user terminal, and forwards the response to the called party CP.
  • the embodiment of the present invention further provides a proxy service application server, including: a call distribution module, wherein the call distribution module is configured to: forward the pickup request to the called device according to the called user terminal information carried in the pickup request Called the called party CP corresponding to the user terminal;
  • the called user terminal information includes a called user terminal long number
  • the pickup request is sent by the pickup CP to the call distribution module and carries the called user terminal information.
  • the embodiment of the present invention further provides a calling party control processor CP, including:
  • the calling party CP is configured to: after receiving the pickup user terminal session initiation protocol sent by the called party CP, forwarding the pickup user terminal session initiation protocol to the calling user terminal; receiving at the calling user terminal After the pickup user terminal session initiation protocol is received, the calling user terminal session initiation protocol sent by the calling user terminal is received, and forwarded to the called party CP.
  • the calling party CP is further configured to: after receiving the call response that is sent by the called party CP and carrying the session initiation protocol of the pickup user terminal, start the session with the pickup user terminal The call response of the protocol is forwarded to the calling user terminal.
  • the calling party CP is further configured to: after receiving, by the calling user terminal, the call response carrying the session initiation protocol of the pickup user terminal, receiving the carried by the calling user terminal The calling party of the calling user terminal session initiation protocol turns on the response and forwards it to the called party CP.
  • the embodiment of the present invention further provides a called party control processor CP, including:
  • the called party CP is configured to: query the current state of the called user terminal according to the called user terminal information carried in the pickup request;
  • the called user terminal information includes a called user terminal long number
  • the pickup request is sent by the pickup CP to the call distribution module, and carries the called user end
  • the call distribution module forwards the pickup request to the called party CP corresponding to the called user terminal according to the called user terminal information carried in the pickup request.
  • the called party CP is further configured to: after receiving the pickup user terminal session initiation protocol sent by the pickup party CP, forwarding the pickup user terminal session initiation protocol to the calling party CP; After receiving the calling user terminal session initiation protocol sent by the calling party CP, the calling user terminal session initiation protocol is forwarded to the calling party CP.
  • the called party CP is further configured to: when the current state of the called user terminal is a ringing state, acquire a calling code from the called user terminal, and send the calling code carrying Responding to the pickup party CP; after receiving the access request sent by the pickup party CP carrying the call code and the pickup user terminal session initiation protocol, according to the access request The calling code in the call releases the call of the called user terminal, and sends a call response carrying the session initiation protocol of the pickup user terminal to the calling party CP.
  • the called party CP is further configured to: after receiving the calling party that has the calling user terminal session initiation protocol sent by the calling party CP, the calling party carries the calling party The calling party turn-on response of the user terminal session initiation protocol is forwarded to the pickup party CP.
  • the call distribution module may route the pickup request of the pickup party CP to the called party CP, and the called party The party CP plays a relay role, and the call between the calling user terminal and the pickup user terminal is connected, and the pickup is completed.
  • FIG. 2 is a flowchart of a CP designated pickup control method according to Embodiment 2 of the present invention.
  • FIG. 3 is a flowchart of a CP designated pickup control method according to Embodiment 3 of the present invention.
  • FIG. 4 is a flowchart of a CP designated pickup control method according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic structural diagram of a CP designated pickup control system according to Embodiment 5 of the present invention.
  • FIG. 6 is a schematic structural diagram of a CP designated pickup control system according to Embodiment 6 of the present invention. Preferred embodiment of the invention
  • a call distribution module is newly added in the proxy service application server, for example, three CPs are taken as an example, CP1-101, CP2-102, CP3-103, and both are answered.
  • the call distribution module After receiving the call request, the call distribution module distributes the numbers with the tail numbers 0, 1, and 2 to the CP1-101; the numbers with the tail numbers 3, 4, and 5 are distributed to the CP2. -102; The numbers with the ending numbers 6, 7, 8, and 9 are distributed to the CP3-103.
  • the calling party CP, the called party CP, and the pickup party CP are taken as an example.
  • the call distribution module distributes the call according to the following rules:
  • the calling party CP processes the service of the calling user terminal, and the called party CP
  • the service of the called user terminal is processed, and the pickup CP processes the service of the user terminal.
  • FIG. 1 is a flowchart of a multi-CP designated pickup control method according to Embodiment 1 of the present invention.
  • the multi-CP designated pickup control method mentioned in this embodiment includes the following steps:
  • Step A The pickup party sends a pickup request carrying the information of the called user terminal to the call distribution module.
  • the call distribution module distributes the call request to the called party CP according to the called user terminal number, and the called party CP forwards the call request to the called party. Call the user terminal.
  • the calling party's calling party's calling service and the called user's terminal picking up the called service are triggered.
  • the called user terminal rings and returns the ringing information to the calling user terminal.
  • the calling user terminal can make a pickup request by dialing "specified pickup access code + called user terminal information", wherein the called party
  • the user terminal information may be the called user terminal short number or the called user terminal long number, or other specific identification code that may refer to the called user terminal.
  • Step B The call distribution module forwards the proxy request to the called party CP corresponding to the called user terminal according to the called user terminal information carried in the pickup request.
  • the pickup CP sends a pickup request to the call distribution module, and the call distribution module distributes the pickup request according to the set distribution rule.
  • the call distribution module of this embodiment is terminated according to the called user.
  • the terminal information finds the called party CP corresponding to the called user terminal. For example, the matching search is performed according to the short number, the long number or the specific identification code of the called user terminal, and the CP responsible for processing the service of the called user terminal is found.
  • Step C The called party CP queries the current state of the called user terminal according to the called user terminal information carried in the pickup request.
  • the called party CP finds the called user terminal according to the short number, long number or specific identification code of the called user terminal, and detects the current state of the called user terminal. If the called user terminal is in the ringing state, the called party processes the generation. Answer service, if the called user terminal has answered the call, the call pickup service is terminated, and the call of the called user terminal is avoided.
  • Step D When the current state of the called user terminal is a ringing state, the called party CP connects the call between the calling user terminal and the pickup user terminal.
  • the called party CP plays a relay role, and the SDP (Session Initiation Protocol) information of the calling user terminal and the pickup user terminal is sent to the other party, thereby connecting the calling user terminal and the calling party. Pick up the call from the user terminal and complete the pickup.
  • SDP Session Initiation Protocol
  • the call distribution module is used, and even if the pickup user terminal and the called user terminal are not on the same CP, the call distribution module can route the pickup request of the pickup party CP to the called party CP, and the called party
  • the party CP plays a relay role, and connects the call between the calling user terminal and the pickup user terminal, and easily realizes the pickup service in the case of multiple CPs.
  • FIG. 2 is a flowchart of a multi-CP designated pickup control method according to Embodiment 2 of the present invention. This embodiment is based on the embodiment shown in FIG. 1, and the steps A, B, and C are described in detail.
  • Step A includes the following steps:
  • Step A01 the pickup party CP receives the pickup request sent by the user terminal and carries the short code of the called user terminal.
  • the pickup user terminal dials the "specified pickup access code + called user terminal short number" to issue a pickup request. In addition, it can also be sent by dialing "Specified Pickup Access Code + Called User Terminal Long Number” or "Specified Pickup Access Code + Called User Terminal Specific Identification Code” Pick up the request.
  • Step A02 the calling party CP obtains the called user terminal long number corresponding to the short number of the called user terminal from the service database according to the short number of the called user terminal carried in the pickup request;
  • the pick-up party CP may first determine whether the pick-up request is legal. When the current answer request is legal, the called user terminal short number is accessed by accessing the service database common to each CP. Convert to the full length of the called user terminal. In addition, if the pickup request sent by the user terminal is carried by the called user terminal specific identification code, the specific identification code needs to be converted into a long number by accessing the service database; If the request carries the long number of the called user terminal, it is not necessary to convert it; or the pickup party CP directly sends the pickup request carrying the short number to the call distribution module, and the call distribution module searches for the long from the service database. number.
  • Step A03 the pickup party CP sends a pickup request carrying the long number of the called user terminal to the call distribution module.
  • the pickup party CP replaces the short number in the pickup request with a long number and then sends the replaced proxy request.
  • Step B includes:
  • Step B01 The call distribution module forwards the pickup request to the called party CP corresponding to the called user terminal according to the long number of the called user terminal carried in the pickup request.
  • the call distribution module finds the called party CP corresponding to the called user terminal according to the long number of the called user terminal, and routes the pickup request to the called party CP corresponding to the called user terminal, thereby realizing the distribution of the call information.
  • Step C includes:
  • Step C01 The called party CP queries the current state of the called user terminal according to the long number of the called user terminal carried in the pickup request.
  • the called party CP finds the called user terminal according to the long number, and detects the current state of the called user terminal. If the called user terminal is in the ringing state, the calling service is processed, and if the called user terminal has answered the calling call, Then the pickup service is terminated, and the call of the called user terminal is avoided.
  • the call distribution module is used in the case of multiple CPs, and the call pickup module transmits the pickup request of the pickup party CP to the called party CP, so as to avoid that the user terminal and the called user terminal are not in the same CP. The above is unable to complete the specified pickup function.
  • FIG. 3 is a flowchart of a multi-CP designated pickup control method according to Embodiment 3 of the present invention. This embodiment is based on the embodiment shown in FIG. 1, and the step D is described in detail. Step D includes the following steps:
  • Step D01 When the current state of the called user terminal is a ringing state, the pickup party CP acquires the pickup user terminal session initiation protocol, and sends it to the called party CP, and the called party CP forwards the caller CP to the calling party CP. It is then forwarded by the calling party CP to the calling user terminal.
  • Step D02 After the calling user terminal receives the pick-up user terminal session initiation protocol, the calling party CP receives the calling user terminal session initiation protocol sent by the calling user terminal, and forwards the call to the called party CP, and is called by the called party. The party CP forwards to the pickup party CP, and then the pickup party CP forwards it to the pickup user terminal.
  • the called party CP When processing the pickup service, the called party CP plays a relay role, and the called party CP forwards the pickup user terminal session initiation protocol to the calling party CP, and forwards the calling user terminal session initiation protocol to the pickup party CP.
  • the two parties After the calling user terminal receives the pick-up user terminal session initiation protocol, and the pickup user terminal receives the calling user terminal session initiation protocol, the two parties can achieve normal call connection, and the generation is easily implemented in the case of multiple CPs. Answer the business.
  • FIG. 4 is a flowchart of a multi-CP designated pickup control method according to Embodiment 4 of the present invention. This embodiment is based on the embodiment shown in FIG. 3 and describes step D01 and step D02 in detail.
  • Step D01 includes the following steps:
  • Step D011 When the current state of the called user terminal is a ringing state, the called party CP acquires a calling code from the called user terminal, and sends a pickup response carrying the calling code to the calling party CP.
  • the called party CP When the called party CP sends a pickup response to the pickup party CP, it indicates that the called party CP agrees to answer the answer. User terminal pickup.
  • Step D012 The pickup party CP obtains the pickup user terminal session initiation protocol from the pickup request, and sends an access request carrying the call code and the pickup user terminal session initiation protocol to the called party CP.
  • the pick-up request When the pick-up user terminal sends a pick-up request to the pick-up party CP, the pick-up request includes a pick-up user terminal session initiation protocol, so when processing the pickup service, the pickup CP can directly from the pickup request The pickup user terminal session initiation protocol is obtained, and the calling code of the called user terminal and the pickup user terminal session initiation protocol are added to the access request and sent to the called party CP.
  • Step DO 13 The called party releases the call of the called user terminal according to the calling code in the access request, and sends a call response carrying the session initiation protocol of the pickup user terminal to the calling party CP.
  • the called party releases the original call on the called user terminal according to the calling code, and replaces the original call with a new call, which is a call between the calling user terminal and the calling user terminal.
  • Step D014 the calling party CP forwards the call response carrying the session initiation protocol of the pickup user terminal to the calling user terminal.
  • Step D02 includes the following steps:
  • Step D021 After the calling user terminal receives the call response carrying the session initiation protocol of the pickup user terminal, the calling party CP receives the calling party that is sent by the calling user terminal and carries the calling user terminal session initiation protocol. Respond to and forward to the called party CP.
  • the calling user terminal After receiving the pick-up user terminal session initiation protocol, the calling user terminal sends its own calling user terminal session initiation protocol, and the called party CP determines the calling user after successfully receiving the calling user terminal session initiation protocol. The terminal agrees to pick up the user terminal to pick up the answer.
  • Step D022 The called party CP forwards the calling party access response carrying the calling user terminal session initiation protocol to the calling party CP, and forwards it to the pickup user terminal by the calling party CP.
  • Step D023 after the pickup user terminal receives the caller's connection response carrying the calling user terminal session initiation protocol, the pickup party CP receives the pickup party's connection response sent by the pickup user terminal, and forwards the response to the Called Party CP.
  • the called party CP After the called party CP successfully receives the calling party connection response and the pickup party connection response, it indicates that both the calling user terminal and the pickup user terminal have received the SIP information of the other party, the calling user terminal and the pickup user.
  • the call between the terminals has been connected, and the pickup service can be easily implemented in the case of multiple CPs.
  • FIG. 5 is a schematic structural view of a multi-CP designated pickup control system according to Embodiment 5 of the present invention.
  • the multi-CP designated pickup control system mentioned in this embodiment is connected to the calling user terminal 11, the called user terminal 12 and the pickup user terminal 13, and the system includes the calling party CP 21, the called party CP 22, and the generation.
  • the pickup party CP 23 is configured to send, to the call distribution module 30, a pickup request carrying the information of the called user terminal 12;
  • the call distribution module 30 is configured to forward the pickup request to the called party CP 22 corresponding to the called user terminal 12 according to the information of the called user terminal 12 carried in the pickup request;
  • the called party CP 22 is configured to query the current state of the called user terminal 12 according to the information of the called user terminal 12 carried in the pickup request.
  • the current state of the called user terminal 12 is the ringing state
  • the main terminal is turned on.
  • the call between the user terminal 11 and the pickup user terminal 13 is called.
  • the call distribution module 30 distributes the call request to the called party CP 22 according to the number of the called user terminal 12, and is called by the called party CP. 22 forwards the call request to the called user terminal 12.
  • the pickup calling service of the calling user terminal 11 and the pickup called service of the called user terminal 12 are triggered.
  • the called user terminal 12 rings and returns the ringing information to the calling user terminal 11.
  • the pickup user terminal 13 can issue a pickup request by dialing "specified generation code + calling user terminal 12 information".
  • the called user terminal 12 information may be a short number or a long number of the called user terminal 12, or other specific identification code that may refer to the called user terminal 12.
  • the pickup party CP 23 sends a pickup request to the call distribution module 30, and the call distribution module 30 distributes the pickup request in accordance with the set distribution rule.
  • the call distribution module 30 of the present embodiment finds the called party CP 22 corresponding to the called user terminal 12 according to the information of the called user terminal 12, for example, according to the short number, long number or specific of the called user terminal 12.
  • the identification code performs a matching search to find a CP responsible for processing the service of the called user terminal 12.
  • the called party CP 22 finds the called user terminal 12 according to the short number, long number or specific identification code of the called user terminal 12, and detects the current state of the called user terminal 12, if the called user terminal 12 is at In the ringing state, the pickup service is processed.
  • the pickup service is terminated to avoid affecting the call of the called user terminal 12.
  • the called party The CP 22 plays a relay role, and transmits the SDP information of the calling user terminal 11 and the pickup user terminal 13 to the other party, thereby connecting the call of the calling user terminal 11 and the pickup user terminal 13 to complete the pickup.
  • the call distribution module 30 can be used to route the pickup request of the pickup party CP 23 to the called party through the call distribution module 30 even if the pickup user terminal 13 and the called user terminal 12 are not on the same CP.
  • the CP 22 is relayed by the called party CP 22, and the call between the calling user terminal 11 and the pickup user terminal 13 is turned on, and the pickup service is easily realized in the case of multiple CPs.
  • FIG. 6 is a schematic structural view of a multi-CP designated pickup control system according to a sixth embodiment of the present invention. This embodiment adds a service database 40 based on the embodiment shown in FIG.
  • the pickup party CP 23 is configured to: receive a pickup request sent by the pickup user terminal 13 carrying the short number of the called user terminal 12; according to the short number of the called user terminal 12 carried in the pickup request, from the service database 40 Obtaining the long number of the called user terminal 12 corresponding to the short number of the called user terminal 12; sending a pickup request carrying the long number of the called user terminal 12 to the call distribution module 30; the call distribution module 30 is configured to use the proxy request Carrying the called user terminal 12 long number, forwarding the pickup request to the called party CP 22 corresponding to the called user terminal 12;
  • the called party CP 22 is configured to query the current state of the called user terminal 12 according to the long number of the called user terminal 12 carried in the pickup request.
  • the pickup user terminal 13 dials the "specified pickup access code + called user terminal 12 short number" to issue a pickup request.
  • the pickup request may also be sent by dialing "Specify Pickup Access Code + Called User Terminal 12 Long Number” or "Specify Pickup Access Code + Called User Terminal 12 Specific Identification Code”.
  • the pickup party CP 23 may first determine whether the pickup request is legal. When the current answer request is legal, the called user is accessed by accessing the service database 40 common to each CP. The terminal 12 short number is converted to the complete called user terminal 12 long number.
  • the specific identification code is also required to be converted into a long number by accessing the service database 40; if the user terminal 13 is picked up
  • the sent pickup request carries the long number of the called user terminal 12, so there is no need to convert it; or the pickup party CP 23 will carry it directly.
  • the short number pickup request is sent to the call distribution module 30, and the call distribution module 30 looks up the long number from the service database 40.
  • the pickup party CP 23 replaces the short number in the pickup request with the long number, and then sends the replaced pickup request.
  • the call distribution module 30 finds the called party CP 22 corresponding to the called user terminal 12 according to the long number of the called user terminal 12, and routes the pickup request to the called party CP 22 corresponding to the called user terminal 12 to implement the call. Distribution of information.
  • the called party CP 22 searches the called user terminal 12 according to the long number, and detects the current state of the called user terminal 12. If the called user terminal 12 is in the ringing state, the pickup service is processed, if the called user terminal 12 If the call is answered, the pickup service is terminated, and the call of the called user terminal 12 is avoided.
  • the call distribution module 30 is used in the case of multiple CPs, and the call pickup module 30 sends the pickup request of the pickup party CP 23 to the called party CP 22 to avoid the user terminal 13 and the called user being picked up.
  • the terminal 12 is not on the same CP, and the designated pickup function cannot be completed.
  • the pickup party CP 23 is further configured to: when the current state of the called user terminal 12 is the ringing state, acquire the session initiation protocol of the pickup user terminal 13 and send it to the called party CP 22; After receiving the session initiation protocol of the calling user terminal 11 sent by the called party CP 22, the calling user terminal 11 session initiation protocol is forwarded to the pickup user terminal 13;
  • the called party CP 22 is further configured to: after receiving the session initiation protocol of the pickup user terminal 13 sent by the pickup party CP 23, forward the session initiation protocol of the pickup user terminal 13 to the calling party CP 21; After the calling user terminal 11 sends a session initiation protocol, the calling user terminal 11 session initiation protocol is forwarded to the pickup party CP 23;
  • the calling party CP 21 is further configured to: after receiving the session initiation protocol of the pickup user terminal 13 sent by the called party CP 22, forward the session initiation protocol of the pickup user terminal 13 to the calling user terminal 11; After receiving the session initiation protocol of the pickup user terminal 13, the terminal 11 receives the session initiation protocol of the calling user terminal 11 sent by the calling user terminal 11, and forwards it to the called party CP 22.
  • the called party CP 22 plays a relay role, forwards the pickup user terminal 13 session initiation protocol to the calling party CP 21, and forwards the calling user terminal 11 session initiation protocol to the pickup party CP.
  • the two parties can implement normal call connection, in multiple CPs. It is easy to implement the pickup service in case.
  • the called party CP 22 is further configured to: when the current state of the called user terminal 12 is in a ringing state, acquire a calling code from the called user terminal 12, and send a pickup response carrying the calling code.
  • the pickup party CP 23 is further configured to: after receiving the pickup response carrying the call code sent by the called party CP 22, obtain the session initiation protocol of the pickup user terminal 13 from the pickup request, and send the session initiation protocol to the called party CP. 22 transmitting an access request carrying a call code and a session initiation protocol of the pickup user terminal 13;
  • the calling party CP 21 is further configured to: after receiving the call response that is sent by the called party CP 22 and carrying the session initiation protocol of the pickup user terminal 13, forward the call response carrying the session initiation protocol of the pickup user terminal 13 to The calling user terminal 11.
  • the called party CP 22 When the called party CP 22 sends a pickup response to the pickup party CP 23, it indicates that the called party CP 22 agrees to pick up the user terminal 13 for pickup. Since the pick-up request is sent by the pick-up user terminal 13 to the pick-up party CP 23, the pick-up request includes the pick-up user terminal 13 session initiation protocol, so when processing the pickup service, the pickup party CP 23 can directly The pickup user terminal 13 session initiation protocol is obtained in the pickup request, and the call code of the called user terminal 12 and the pickup user terminal 13 session initiation protocol are added to the access request and sent to the called party CP 22. The called party CP 22 releases the original call on the called user terminal 12 according to the calling code, and replaces the original call with a new call, which is the call between the calling user terminal 13 and the calling user terminal 11. call.
  • the calling party CP 21 is further configured to: after the calling user terminal 11 receives the call response carrying the session initiation protocol of the pickup user terminal 13, receive the calling party sent by the calling user terminal 11 The calling party of the user terminal 11 session initiation protocol turns on the response and forwards it to the called party CP 22;
  • the called party CP 22 is further configured to: after receiving the caller's connection response sent by the calling party CP 21 carrying the session initiation protocol of the calling user terminal 11, the session of the calling user terminal 11 will be carried.
  • the calling party of the protocol is connected to the response and forwarded to the pickup party CP 23;
  • the pickup party CP 23 is further configured to: after receiving the caller's connection response sent by the called party CP 22 carrying the session initiation protocol of the calling user terminal 11, the session initiation protocol of the calling user terminal 11 will be carried.
  • the calling party connection response is forwarded to the pickup user terminal 13; after the pickup user terminal 13 receives the caller's connection response carrying the session initiation protocol of the calling user terminal 11, the receiving and receiving user terminal 13 sends The pickup party turns on the response and forwards it to the called party CP 22.
  • the calling user terminal 11 After receiving the session initiation protocol of the pickup user terminal 13, the calling user terminal 11 sends its own calling user terminal 11 session initiation protocol, and the called party CP 22 successfully receives the session initiation protocol of the calling user terminal 11 after successfully receiving the session initiation protocol of the calling user terminal 11 That is, it is determined that the calling user terminal 11 agrees to pick up the user terminal 13 for pickup. After the called party CP 22 successfully receives the calling party connection response and the pickup party connection response, it indicates that both the calling user terminal 11 and the pickup user terminal 13 have received the SIP information of the other party, and the calling user terminal 11 The call between the user terminal 13 and the pickup user terminal 13 has been turned on, and the pickup service is easily implemented in the case of multiple CPs.
  • the embodiment of the present invention further provides a proxy control processor CP, including:
  • the pickup party CP is configured to: send a pickup request carrying the information of the called user terminal to the call distribution module;
  • the call distribution module forwards the pickup request to the called party CP corresponding to the called user terminal according to the called user terminal information carried in the pickup request; the called party CP according to the The called user terminal information carried in the pickup request, the current state of the called user terminal is queried, and when the current state of the called user terminal is a ringing state, the calling user terminal and the pickup user terminal are connected. The call between.
  • the pickup party CP is configured to: receive a pickup request sent by the pickup user terminal and carry the short number of the called user terminal; and according to the short number of the called user terminal carried in the pickup request, Acquiring, by the service database, the called user terminal long number corresponding to the short number of the called user terminal; and sending, to the call distribution module, a pickup request carrying the long number of the called user terminal.
  • the calling party CP is further configured to: when the current state of the called user terminal is a ringing state, obtain a pick-up user terminal session initiation protocol, and send to the called party CP; After the calling user terminal session initiation protocol sent by the called party CP, forwarding the calling user terminal session initiation protocol to the pickup user terminal;
  • the proxy request includes the pickup user terminal session initiation protocol; and the pickup party CP is further configured to: receive the pickup code carried by the called party CP After the response, the pickup user terminal session initiation protocol is obtained from the pickup request, and an access request carrying the call code and the pickup user terminal session initiation protocol is sent to the called party CP. .
  • the picking party CP is further configured to: after receiving the caller's connection response sent by the called party CP and carrying the calling user terminal session initiation protocol, carrying the calling party The calling party connection response of the user terminal session initiation protocol is forwarded to the pickup user terminal; after the pickup user terminal receives the caller's connection response carrying the caller terminal session initiation protocol, Receiving a pickup party connection response sent by the pickup user terminal, and forwarding to the called party CP.
  • the embodiment of the present invention further provides a proxy service application server, including: a call distribution module, wherein the call distribution module is configured to: forward the pickup request according to the called user terminal information carried in the pickup request To the called party CP corresponding to the called user terminal;
  • the called user terminal information includes a called user terminal long number
  • the pickup request is sent by the pickup CP to the call distribution module and carries the called user terminal information.
  • the embodiment of the present invention further provides a calling party control processor CP, including:
  • the calling party CP is configured to: after receiving the pickup user terminal session initiation protocol sent by the called party CP, forwarding the pickup user terminal session initiation protocol to the calling user terminal; receiving at the calling user terminal After the pickup user terminal session initiation protocol is received, the calling user terminal session initiation protocol sent by the calling user terminal is received, and forwarded to the called party CP.
  • the calling party CP is further configured to: after receiving the call response that is sent by the called party CP and carrying the session initiation protocol of the pickup user terminal, start the session with the pickup user terminal The call response of the protocol is forwarded to the calling user terminal.
  • the calling party CP is further configured to: after receiving, by the calling user terminal, the call response carrying the session initiation protocol of the pickup user terminal, receiving the carried by the calling user terminal The calling party of the calling user terminal session initiation protocol turns on the response and forwards it to the called party CP.
  • the embodiment of the present invention further provides a called party control processor CP, including:
  • the called party CP is configured to: query the current state of the called user terminal according to the called user terminal information carried in the pickup request;
  • the called user terminal information includes a called user terminal long number
  • the pickup request is sent by the pickup party CP to the call distribution module, and carries the called user terminal information; the call distribution module forwards the pickup request according to the called user terminal information carried in the pickup request The called party CP corresponding to the called user terminal.
  • the called party CP is further configured to: after receiving the pickup user terminal session initiation protocol sent by the pickup party CP, forwarding the pickup user terminal session initiation protocol to the calling party CP; After receiving the calling user terminal session initiation protocol sent by the calling party CP, the calling user terminal session initiation protocol is forwarded to the calling party CP.
  • the called party CP is further configured to: when the current state of the called user terminal is a ringing state, acquire a calling code from the called user terminal, and send the calling code carrying Responding to the pickup party CP; after receiving the access request sent by the pickup party CP carrying the call code and the pickup user terminal session initiation protocol, according to the access request The calling code in the call releases the call of the called user terminal, and sends a call response carrying the session initiation protocol of the pickup user terminal to the calling party CP.
  • the called party CP is further configured to: after receiving the calling party that has the calling user terminal session initiation protocol sent by the calling party CP, the calling party carries the calling party The calling party turn-on response of the user terminal session initiation protocol is forwarded to the pickup party CP.
  • the call forwarding module may route the pickup request of the pickup party CP to the called party CP, and the called party CP plays a relay role, and the call between the calling user terminal and the pickup user terminal is connected. , complete the pickup.

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Abstract

一种多CP指定代答控制方法和系统。所述方法包括：代答方CP向呼叫分发模块发送携带有被叫用户终端信息的代答请求；呼叫分发模块根据所述代答请求中携带的被叫用户终端信息，将所述代答请求转发至被叫用户终端对应的被叫方CP；被叫方CP根据代答请求中携带的被叫用户终端信息，查询被叫用户终端的当前状态；以及当被叫用户终端的当前状态为振铃态时，被叫方CP接通主叫用户终端与代答用户终端之间的通话。

Description

多 CP指定代答控制方法和系统
技术领域
本发明涉及到通讯技术领域， 特别涉及到多 CP ( Control Processor, 控制 处理器）指定代答控制方法和系统。
背景技术
NGN( Next Generation Network,下一代通信网络）及 IMS( Internet Protocol ( IP ) Multimedia Subsystem, 互联网协议多媒体子系统） 下的 CENTREX ( CENTRalized EXchange , 集中式用户交换机 )业务是将 NGN/IMS域内的 有线和无线接入终端共同组成一个虚拟的内部通信网络，在 CENTREX内部 , 用户可通过短号码互相通话， 并实现 CENTREX用户的一些基本业务功能， 如， 号码显示和限制、 呼叫转移、 呼叫前转、 以及话务员等。 指定代答业务 是 CENTREX业务中一个重要的业务特征， 它在传统电路域中就有着广泛的 应用。 当某一分机来话无应答时， 由同一用户群内的其它分机代为应答， 操 作方式为， 当无人应答的分机振铃时，代答用户按代答接入码 +被代答的分机 号码。 使用指定代答功能时， 代答的用户需要指定被代答的分机号码， 方可 代答正在振铃的该分机的来话。 目前， 指定代答技术都是基于单 CP实现的， 应用服务器的单个 CP承载的用户量是有限的， 当用户量达到一定规模必然 要使用多个 CP来进行负载均衡， 从而提升业务系统的处理能力。 但是多 CP 的架构必然给业务的处理带来巨大的挑战， 因为用户在触发某些业务的时候 如果在不同的 CP上是很难处理的， 例如， 相关技术中的指定代答技术在多 CP架构下就无法完成指定代答功能。 发明内容
本发明实施例提供一种能在多 CP下实现指定代答功能的多 CP指定代答 控制方法和系统。
本发明实施例提供一种多控制处理器 CP指定代答控制方法， 包括： 代答方 CP向呼叫分发模块发送携带有被叫用户终端信息的代答请求； 呼叫分发模块根据所述代答请求中携带的被叫用户终端信息 , 将所述代 答请求转发至被叫用户终端对应的被叫方 CP;
被叫方 CP根据代答请求中携带的被叫用户终端信息， 查询被叫用户终 端的当前状态； 以及
当被叫用户终端的当前状态为振铃态时， 被叫方 CP接通主叫用户终端 与代答用户终端之间的通话。
可选地， 所述代答方 CP 向呼叫分发模块发送携带有被叫用户终端信息 的代答请求包括：
所述代答方 CP接收代答用户终端发送的携带有被叫用户终端短号码的 代答请求；
所述代答方 CP根据所述代答请求中携带的被叫用户终端短号码， 从业 务数据库中获取所述被叫用户终端短号码对应的被叫用户终端长号码； 以及 所述代答方 CP 向所述呼叫分发模块发送携带有被叫用户终端长号码的 代答请求；
所述呼叫分发模块根据所述代答请求中携带的被叫用户终端信息 , 将所 述代答请求转发至被叫用户终端对应的被叫方 CP包括：
所述呼叫分发模块根据所述代答请求中携带的被叫用户终端长号码， 将 所述代答请求转发至所述被叫用户终端对应的被叫方 CP;
所述被叫方 CP根据所述代答请求中携带的被叫用户终端信息， 查询所 述被叫用户终端的当前状态包括：
所述被叫方 CP根据所述代答请求中携带的被叫用户终端长号码， 查询 被叫用户终端的当前状态。
可选地， 所述当所述被叫用户终端的当前状态为振铃态时， 所述被叫方 CP接通主叫用户终端与代答用户终端之间的通话包括：
当被叫用户终端的当前状态为振铃态时， 代答方 CP获取代答用户终端 会话启动协议， 并发送至被叫方 CP, 由被叫方 CP转发至主叫方 CP, 再由主 叫方 CP转发至主叫用户终端； 以及
在主叫用户终端接收到代答用户终端会话启动协议后， 主叫方 CP接收 主叫用户终端发送的主叫用户终端会话启动协议， 并转发至被叫方 CP, 并由 被叫方 CP转发至代答方 CP, 再由代答方 CP转发至代答用户终端。
可选地， 所述代答请求包含有代答用户终端会话启动协议；
所述当所述被叫用户终端的当前状态为振铃态时， 所述代答方 CP获取 代答用户终端会话启动协议， 并发送至所述被叫方 CP, 由被叫方 CP转发至 主叫方 CP, 再由所述主叫方 CP转发至所述主叫用户终端包括：
当所述被叫用户终端的当前状态为振铃态时， 所述被叫方 CP从所述被 叫用户终端获取呼叫码， 并发送携带有所述呼叫码的代答响应至所述代答方 CP;
所述代答方 CP从所述代答请求中获取代答用户终端会话启动协议， 并 向所述被叫方 CP发送携带有所述呼叫码和代答用户终端会话启动协议的接 入请求；
所述被叫方 CP根据所述接入请求中的呼叫码， 释放所述被叫用户终端 的呼叫， 并发送携带有代答用户终端会话启动协议的呼叫响应至所述主叫方
CP; 以及
所述主叫方 CP将所述携带有代答用户终端会话启动协议的呼叫响应转 发至所述主叫用户终端。
可选地， 所述步骤在所述主叫用户终端接收到所述代答用户终端会话启 动协议后， 所述主叫方 CP接收所述主叫用户终端发送的主叫用户终端会话 启动协议， 并转发至所述被叫方 CP, 并由所述被叫方 CP转发至所述代答方 CP, 再由所述代答方 CP转发至所述代答用户终端包括：
在主叫用户终端接收到所述携带有代答用户终端会话启动协议的呼叫响 应后， 主叫方 CP接收主叫用户终端发送的携带有主叫用户终端会话启动协 议的主叫方接通响应， 并转发至被叫方 CP;
被叫方 CP将所述携带有主叫用户终端会话启动协议的主叫方接通响应 转发至代答方 CP, 并由代答方 CP转发至代答用户终端； 以及 在代答用户终端接收到所述携带有主叫用户终端会话启动协议的主叫方 接通响应后， 代答方 CP接收代答用户终端发送的代答方接通响应， 并转发 至被叫方 CP。
本发明实施例还提供一种多控制处理器 CP指定代答控制系统， 包括： 主叫方 CP、 被叫方 CP、 代答方 CP和呼叫分发模块， 其中：
所述代答方 CP设置成： 向呼叫分发模块发送携带有被叫用户终端信息 的代答请求；
所述呼叫分发模块设置成： 根据所述代答请求中携带的被叫用户终端信 息， 将所述代答请求转发至被叫用户终端对应的被叫方 CP; 以及
所述被叫方 CP设置成： 根据代答请求中携带的被叫用户终端信息， 查 询被叫用户终端的当前状态； 当被叫用户终端的当前状态为振铃态时， 接通 主叫用户终端与代答用户终端之间的通话。
可选地， 所述系统还包括： 业务数据库； 其中，
所述代答方 CP是设置成： 接收代答用户终端发送的携带有被叫用户终 端短号码的代答请求； 根据所述代答请求中携带的被叫用户终端短号码， 从 业务数据库中获取所述被叫用户终端短号码对应的被叫用户终端长号码； 以 及向所述呼叫分发模块发送携带有被叫用户终端长号码的代答请求；
所述呼叫分发模块是设置成： 根据所述代答请求中携带的被叫用户终端 长号码， 将所述代答请求转发至所述被叫用户终端对应的被叫方 CP; 以及 所述被叫方 CP是设置成： 根据所述代答请求中携带的被叫用户终端长 号码， 查询被叫用户终端的当前状态。
可选地， 所述代答方 CP还设置成： 当被叫用户终端的当前状态为振铃 态时， 获取代答用户终端会话启动协议， 并发送至所述被叫方 CP; 在接收到 所述被叫方 CP发送的主叫用户终端会话启动协议后， 将所述主叫用户终端 会话启动协议转发至所述代答用户终端；
所述被叫方 CP还设置成：在接收到所述代答方 CP发送的代答用户终端 会话启动协议后， 将所述代答用户终端会话启动协议转发至所述主叫方 CP; 在接收到所述主叫方 CP发送的主叫用户终端会话启动协议后， 将所述主叫 用户终端会话启动协议转发至所述代答方 CP; 以及
所述主叫方 CP还设置成：在接收到所述被叫方 CP发送的代答用户终端 会话启动协议后， 将所述代答用户终端会话启动协议转发至所述主叫用户终 端； 在所述主叫用户终端接收到代答用户终端会话启动协议后， 接收所述主 叫用户终端发送的主叫用户终端会话启动协议， 并转发至所述被叫方 CP。
可选地， 所述代答请求包含有代答用户终端会话启动协议；
所述被叫方 CP还设置成： 当所述被叫用户终端的当前状态为振铃态时， 从所述被叫用户终端获取呼叫码， 并发送携带有所述呼叫码的代答响应至所 述代答方 CP; 在接收到所述代答方 CP发送的携带有所述呼叫码和代答用户 终端会话启动协议的接入请求后， 根据所述接入请求中的呼叫码， 释放所述 被叫用户终端的呼叫， 并发送携带有代答用户终端会话启动协议的呼叫响应 至所述主叫方 CP;
所述代答方 CP还设置成：在接收到所述被叫方 CP发送的携带有所述呼 叫码的代答响应后， 从所述代答请求中获取代答用户终端会话启动协议， 并 向所述被叫方 CP发送携带有所述呼叫码和代答用户终端会话启动协议的接 入请求； 以及 所述主叫方 CP还设置成：在接收到所述被叫方 CP发送的携带有代答用 户终端会话启动协议的呼叫响应后， 将所述携带有代答用户终端会话启动协 议的呼叫响应转发至所述主叫用户终端。
可选地， 所述主叫方 CP还设置成： 在主叫用户终端接收到所述携带有 代答用户终端会话启动协议的呼叫响应后， 接收所述主叫用户终端发送的携 带有主叫用户终端会话启动协议的主叫方接通响应， 并转发至所述被叫方
CP;
所述被叫方 CP还设置成：在接收到所述主叫方 CP发送的携带有主叫用 户终端会话启动协议的主叫方接通响应后， 将所述携带有主叫用户终端会话 启动协议的主叫方接通响应转发至所述代答方 CP; 以及
所述代答方 CP还设置成：在接收到所述被叫方 CP发送的携带有主叫用 户终端会话启动协议的主叫方接通响应后， 将所述携带有主叫用户终端会话 启动协议的主叫方接通响应转发至代答用户终端； 在代答用户终端接收到所 述携带有主叫用户终端会话启动协议的主叫方接通响应后， 接收所述代答用 户终端发送的代答方接通响应， 并转发至所述被叫方 CP。
本发明实施例还提供一种代答方控制处理器 CP, 包括：
所述代答方 CP设置成： 向呼叫分发模块发送携带有被叫用户终端信息 的代答请求；
其中 ,所述呼叫分发模块根据所述代答请求中携带的被叫用户终端信息 , 将所述代答请求转发至被叫用户终端对应的被叫方 CP; 所述被叫方 CP根据 所述代答请求中携带的被叫用户终端信息， 查询所述被叫用户终端的当前状 态， 当所述被叫用户终端的当前状态为振铃态时， 接通主叫用户终端与代答 用户终端之间的通话。
可选地， 所述代答方 CP是设置成： 接收代答用户终端发送的携带有被 叫用户终端短号码的代答请求； 根据所述代答请求中携带的被叫用户终端短 号码， 从业务数据库中获取所述被叫用户终端短号码对应的被叫用户终端长 号码； 以及向所述呼叫分发模块发送携带有所述被叫用户终端长号码的代答 请求。
可选地， 所述代答方 CP还设置成： 当所述被叫用户终端的当前状态为 振铃态时， 获取代答用户终端会话启动协议， 并发送至被叫方 CP; 在接收到 所述被叫方 CP发送的主叫用户终端会话启动协议后， 将所述主叫用户终端 会话启动协议转发至所述代答用户终端；
可选地， 所述代答请求包含有所述代答用户终端会话启动协议； 以及 所述代答方 CP还设置成：在接收到所述被叫方 CP发送的携带有呼叫码 的代答响应后， 从所述代答请求中获取所述代答用户终端会话启动协议， 并 向所述被叫方 CP发送携带有所述呼叫码和所述代答用户终端会话启动协议 的接入请求。
可选地， 所述代答方 CP还设置成： 在接收到所述被叫方 CP发送的携带 有主叫用户终端会话启动协议的主叫方接通响应后， 将所述携带有主叫用户 终端会话启动协议的主叫方接通响应转发至所述代答用户终端； 在所述代答 用户终端接收到所述携带有主叫用户终端会话启动协议的主叫方接通响应 后 ,接收所述代答用户终端发送的代答方接通响应 ,并转发至所述被叫方 CP。
本发明实施例还提供一种代答业务应用服务器， 包括： 呼叫分发模块， 所述呼叫分发模块设置成： 根据代答请求中携带的被叫用户终端信息， 将所述代答请求转发至被叫用户终端对应的被叫方 CP;
其中， 所述被叫用户终端信息包括被叫用户终端长号码； 以及
所述代答请求由代答方 CP 向所述呼叫分发模块发送， 并携带有被叫用 户终端信息。
本发明实施例还提供一种主叫方控制处理器 CP, 包括：
所述主叫方 CP设置成：在接收到被叫方 CP发送的代答用户终端会话启 动协议后， 将代答用户终端会话启动协议转发至主叫用户终端； 在所述主叫 用户终端接收到所述代答用户终端会话启动协议后， 接收所述主叫用户终端 发送的主叫用户终端会话启动协议， 并转发至所述被叫方 CP。
可选地， 所述主叫方 CP还设置成： 在接收到所述被叫方 CP发送的携带 有代答用户终端会话启动协议的呼叫响应后， 将所述携带有代答用户终端会 话启动协议的呼叫响应转发至所述主叫用户终端。
可选地， 所述主叫方 CP还设置成： 在所述主叫用户终端接收到所述携 带有代答用户终端会话启动协议的呼叫响应后， 接收所述主叫用户终端发送 的携带有主叫用户终端会话启动协议的主叫方接通响应， 并转发至所述被叫 方 CP。
本发明实施例还提供一种被叫方控制处理器 CP, 包括：
所述被叫方 CP设置成： 根据代答请求中携带的被叫用户终端信息， 查 询所述被叫用户终端的当前状态；
当所述被叫用户终端的当前状态为振铃态时， 接通主叫用户终端与代答 用户终端之间的通话；
其中， 所述被叫用户终端信息包括被叫用户终端长号码； 以及
所述代答请求由代答方 CP 向呼叫分发模块发送， 并携带有被叫用户终 端信息； 呼叫分发模块根据所述代答请求中携带的被叫用户终端信息， 将所 述代答请求转发至被叫用户终端对应的被叫方 CP。
可选地， 所述被叫方 CP还设置成： 在接收到代答方 CP发送的代答用户 终端会话启动协议后， 将所述代答用户终端会话启动协议转发至主叫方 CP; 在接收到所述主叫方 CP发送的主叫用户终端会话启动协议后， 将所述主叫 用户终端会话启动协议转发至所述代答方 CP。
可选地， 所述被叫方 CP还设置成： 当所述被叫用户终端的当前状态为 振铃态时， 从所述被叫用户终端获取呼叫码， 并发送携带有所述呼叫码的代 答响应至所述代答方 CP; 在接收到所述代答方 CP发送的携带有所述呼叫码 和所述代答用户终端会话启动协议的接入请求后， 根据所述接入请求中的呼 叫码， 释放所述被叫用户终端的呼叫， 并发送携带有代答用户终端会话启动 协议的呼叫响应至所述主叫方 CP。
可选地， 所述被叫方 CP还设置成： 在接收到所述主叫方 CP发送的携带 有主叫用户终端会话启动协议的主叫方接通响应后， 将所述携带有主叫用户 终端会话启动协议的主叫方接通响应转发至所述代答方 CP。
本发明实施例中针对多 CP,在代答用户终端和被叫用户终端不在同一个 CP上时， 可以通过呼叫分发模块将代答方 CP的代答请求路由到被叫方 CP , 由被叫方 CP起到中转作用， 接通主叫用户终端与代答用户终端的通话， 完 成代答。 附图概述
图 1为本发明实施例一的 CP指定代答控制方法的流程图
图 2为本发明实施例二的 CP指定代答控制方法的流程图
图 3为本发明实施例三的 CP指定代答控制方法的流程图
图 4为本发明实施例四的 CP指定代答控制方法的流程图
图 5为本发明实施例五的 CP指定代答控制系统的结构示意图 图 6为本发明实施例六的 CP指定代答控制系统的结构示意图 本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。 应当理解， 在不冲 突的情况下， 本申请中的实施例及实施例中的特征可以相互任意组合。
本发明实施例中针对多 CP 的情况， 在代答业务应用服务器中新增加了 呼叫分发模块， 例如， 以三个 CP为例， CP1-101、 CP2-102、 CP3-103 , 均与 代答业务应用服务器的统一对外接口连接， 在接收到呼叫请求后， 呼叫分发 模块将尾号为 0、 1、 2的号码分发到 CP1-101上； 尾号为 3、 4、 5的号码分 发到 CP2-102上； 尾号为 6、 7、 8、 9的号码分发到 CP3-103上。 在下列实施 例中以主叫方 CP、 被叫方 CP和代答方 CP为例， 呼叫分发模块按照以下规 则对呼叫进行分发： 主叫方 CP处理主叫用户终端的业务， 被叫方 CP处理被 叫用户终端的业务， 代答方 CP处理代答用户终端的业务。
实施例一
如图 1所示，图 1为本发明实施例一的多 CP指定代答控制方法的流程图。 本实施例提到的多 CP指定代答控制方法， 包括如下步骤：
步骤 A,代答方 CP向呼叫分发模块发送携带有被叫用户终端信息的代答 请求。
本实施例中， 当主叫用户终端向被叫用户终端发起呼叫时， 呼叫分发模 块根据被叫用户终端号码， 将呼叫请求分发至被叫方 CP, 并由被叫方 CP转 发呼叫请求至被叫用户终端。 同时， 主叫用户终端的代答主叫业务和被叫用 户终端的代答被叫业务被触发。 被叫用户终端振铃， 向主叫用户终端返回振 铃信息， 此时， 代答用户终端可通过拨打 "指定代答接入码 +被叫用户终端信 息" 发出代答请求， 其中， 被叫用户终端信息可以是被叫用户终端短号码或 被叫用户终端长号码， 或其他可以指代被叫用户终端的特定标识码。
步骤 B, 呼叫分发模块根据代答请求中携带的被叫用户终端信息， 将代 答请求转发至被叫用户终端对应的被叫方 CP。
代答方 CP将代答请求发送到呼叫分发模块， 由呼叫分发模块按照设定 的分发规则对代答请求进行分发。 本实施例的呼叫分发模块根据被叫用户终 端信息查找到被叫用户终端对应的被叫方 CP, 例如， 根据被叫用户终端的短 号码、 长号码或特定标识码进行匹配查找， 找到负责处理被叫用户终端业务 的 CP。
步骤 C,被叫方 CP根据代答请求中携带的被叫用户终端信息，查询被叫 用户终端的当前状态。
被叫方 CP根据被叫用户终端的短号码、 长号码或特定标识码， 查找到 被叫用户终端， 并检测被叫用户终端的当前状态， 如果被叫用户终端处于振 铃状态， 就处理代答业务， 如果被叫用户终端已经应答呼叫通话， 则终止代 答业务， 避免对被叫用户终端的通话造成影响。
步骤 D, 当被叫用户终端的当前状态为振铃态时，被叫方 CP接通主叫用 户终端与代答用户终端之间的通话。
在处理代答业务时， 被叫方 CP起到中转作用， 将主叫用户终端与代答 用户终端的 SDP ( Session Initiation Protocol, 会话启动协议 )信息发至对方， 从而接通主叫用户终端与代答用户终端的通话， 完成代答。
本实施例釆用呼叫分发模块， 即使代答用户终端和被叫用户终端不在同 一个 CP上，也可以通过呼叫分发模块将代答方 CP的代答请求路由到被叫方 CP, 由被叫方 CP起到中转作用， 接通主叫用户终端与代答用户终端的通话， 在多 CP情况下轻松实现代答业务。
实施例二
如图 2所示，图 2为本发明实施例二的多 CP指定代答控制方法的流程图。 本实施例以图 1所示实施例为基础， 对步骤 A、 B、 C详细描述。
步骤 A包括如下步骤：
步骤 A01 ,代答方 CP接收代答用户终端发送的携带有被叫用户终端短号 码的代答请求。
在被叫用户终端振铃时，代答用户终端拨打 "指定代答接入码 +被叫用户 终端短号码"发出代答请求。 此外， 也可通过拨打 "指定代答接入码 +被叫用 户终端长号码"或 "指定代答接入码 +被叫用户终端特定标识码"等方式发出 代答请求。
步骤 A02 ,代答方 CP根据代答请求中携带的被叫用户终端短号码，从业 务数据库中获取被叫用户终端短号码对应的被叫用户终端长号码；
代答方 CP在接收到代答用户终端发送的代答请求后， 可先判断代答请 求是否合法， 当代答请求合法时， 则通过访问各 CP公用的业务数据库， 将 被叫用户终端短号码转换为完整的被叫用户终端长号码。 此外， 如果代答用 户终端发送的代答请求中携带的是被叫用户终端特定标识码， 则同样需要通 过访问业务数据库， 将特定标识码转换为长号码； 如果代答用户终端发送的 代答请求中携带的是被叫用户终端长号码， 则无需再对其进行转换； 或代答 方 CP直接将携带短号码的代答请求发送到呼叫分发模块， 由呼叫分发模块 从业务数据库中查找长号码。
步骤 A03 ,代答方 CP向呼叫分发模块发送携带有被叫用户终端长号码的 代答请求。
代答方 CP将代答请求中的短号码替换为长号码后， 再发送替换后的代 答请求。
步骤 B包括：
步骤 B01 , 呼叫分发模块根据代答请求中携带的被叫用户终端长号码， 将代答请求转发至被叫用户终端对应的被叫方 CP。
呼叫分发模块根据被叫用户终端长号码找到被叫用户终端对应的被叫方 CP, 并将代答请求路由到被叫用户终端对应的被叫方 CP上， 实现对呼叫信 息的分发。
步骤 C包括：
步骤 C01 ,被叫方 CP根据代答请求中携带的被叫用户终端长号码，查询 被叫用户终端的当前状态。
被叫方 CP根据长号码查找到被叫用户终端， 并检测被叫用户终端的当 前状态， 如果被叫用户终端处于振铃状态， 就处理代答业务， 如果被叫用户 终端已经应答呼叫通话， 则终止代答业务， 避免对被叫用户终端的通话造成 影响。 本实施例在多 CP 的情况下釆用呼叫分发模块， 通过呼叫分发模块将代 答方 CP的代答请求路由到被叫方 CP , 避免因代答用户终端和被叫用户终端 不在同一个 CP上而造成无法完成指定代答功能。
实施例三
如图 3所示，图 3为本发明实施例三的多 CP指定代答控制方法的流程图。 本实施例以图 1所示实施例为基础， 对步骤 D详细描述。 步骤 D包括如下步 骤：
步骤 D01 , 当被叫用户终端的当前状态为振铃态时，代答方 CP获取代答 用户终端会话启动协议，并发送至被叫方 CP,由被叫方 CP转发至主叫方 CP, 再由主叫方 CP转发至主叫用户终端。
步骤 D02, 在主叫用户终端接收到代答用户终端会话启动协议后， 主叫 方 CP接收主叫用户终端发送的主叫用户终端会话启动协议， 并转发至被叫 方 CP, 并由被叫方 CP转发至代答方 CP, 再由代答方 CP转发至代答用户终 端。
在处理代答业务时， 被叫方 CP起到中转作用， 被叫方 CP将代答用户终 端会话启动协议转发至主叫方 CP,并且将主叫用户终端会话启动协议转发至 代答方 CP, 主叫用户终端接收到代答用户终端会话启动协议后， 且代答用户 终端接收到主叫用户终端会话启动协议后， 双方即可实现正常的通话接通， 在多 CP情况下轻松实现代答业务。
实施例四
如图 4所示，图 4为本发明实施例四的多 CP指定代答控制方法的流程图。 本实施例以图 3所示实施例为基础， 对步骤 D01和步骤 D02详细描述。
步骤 D01包括如下步骤：
步骤 D011 , 当被叫用户终端的当前状态为振铃态时， 被叫方 CP从被叫 用户终端获取呼叫码， 并发送携带有呼叫码的代答响应至代答方 CP。
当被叫方 CP向代答方 CP发送代答响应时， 则表示被叫方 CP同意代答 用户终端代答。
步骤 D012, 代答方 CP从代答请求中获取代答用户终端会话启动协议， 并向被叫方 CP发送携带有呼叫码和代答用户终端会话启动协议的接入请求。
由于在代答用户终端向代答方 CP发送代答请求时， 代答请求中包含有 代答用户终端会话启动协议， 因此在处理代答业务时， 代答方 CP可直接从 代答请求中获取代答用户终端会话启动协议， 并将被叫用户终端的呼叫码和 代答用户终端会话启动协议添加到接入请求中， 发送至被叫方 CP。
步骤 DO 13 , 被叫方 CP根据接入请求中的呼叫码， 释放被叫用户终端的 呼叫， 并发送携带有代答用户终端会话启动协议的呼叫响应至主叫方 CP。
被叫方 CP根据呼叫码释放掉被叫用户终端上的原有呼叫， 并用新的呼 叫代替原有呼叫，该新的呼叫即为代答用户终端与主叫用户终端之间的呼叫。
步骤 D014, 主叫方 CP将携带有代答用户终端会话启动协议的呼叫响应 转发至主叫用户终端。
步骤 D02包括如下步骤：
步骤 D021 ,在主叫用户终端接收到携带有代答用户终端会话启动协议的 呼叫响应后， 主叫方 CP接收主叫用户终端发送的携带有主叫用户终端会话 启动协议的主叫方接通响应， 并转发至被叫方 CP。
主叫用户终端接收到代答用户终端会话启动协议后， 将自身的主叫用户 终端会话启动协议发送出去， 被叫方 CP在成功接收到主叫用户终端会话启 动协议后， 即判定主叫用户终端同意代答用户终端代答。
步骤 D022, 被叫方 CP将携带有主叫用户终端会话启动协议的主叫方接 通响应转发至代答方 CP, 并由代答方 CP转发至代答用户终端。
步骤 D023 ,在代答用户终端接收到携带有主叫用户终端会话启动协议的 主叫方接通响应后， 代答方 CP接收代答用户终端发送的代答方接通响应， 并转发至被叫方 CP。
被叫方 CP在成功接收到主叫方接通响应和代答方接通响应， 则说明主 叫用户终端和代答用户终端都已接收到对方的 SIP信息， 主叫用户终端和代 答用户终端之间的通话已经接通， 在多 CP情况下轻松实现代答业务。 实施例五
如图 5所示，图 5为本发明实施例五的多 CP指定代答控制系统的结构示 意图。 本实施例提到的多 CP指定代答控制系统， 与主叫用户终端 11、 被叫 用户终端 12和代答用户终端 13连接 ,该系统包括主叫方 CP 21、被叫方 CP 22、 代答方 CP 23和呼叫分发模块 30, 其中：
代答方 CP 23用于， 向呼叫分发模块 30发送携带有被叫用户终端 12信 息的代答请求；
呼叫分发模块 30用于， 根据代答请求中携带的被叫用户终端 12信息， 将代答请求转发至被叫用户终端 12对应的被叫方 CP 22; 以及
被叫方 CP 22用于， 根据代答请求中携带的被叫用户终端 12信息， 查询 被叫用户终端 12的当前状态； 当被叫用户终端 12的当前状态为振铃态时， 接通主叫用户终端 11与代答用户终端 13之间的通话。
本实施例中， 当主叫用户终端 11向被叫用户终端 12发起呼叫时， 呼叫 分发模块 30根据被叫用户终端 12号码，将呼叫请求分发至被叫方 CP 22,并 由被叫方 CP 22转发呼叫请求至被叫用户终端 12。 同时， 主叫用户终端 11 的代答主叫业务和被叫用户终端 12 的代答被叫业务被触发。 被叫用户终端 12振铃， 向主叫用户终端 11返回振铃信息， 此时， 代答用户终端 13可通过 拨打 "指定代^妻入码 +被叫用户终端 12信息" 发出代答请求， 其中， 被叫 用户终端 12信息可以是被叫用户终端 12短号码或长号码， 或其他可以指代 被叫用户终端 12的特定标识码。代答方 CP 23将代答请求发送到呼叫分发模 块 30, 由呼叫分发模块 30按照设定的分发规则对代答请求进行分发。 本实 施例的呼叫分发模块 30才艮据被叫用户终端 12信息查找到被叫用户终端 12对 应的被叫方 CP 22, 例如， 才艮据被叫用户终端 12的短号码、 长号码或特定标 识码进行匹配查找，找到负责处理被叫用户终端 12业务的 CP。被叫方 CP 22 才艮据被叫用户终端 12的短号码、 长号码或特定标识码， 查找到被叫用户终端 12, 并检测被叫用户终端 12的当前状态， 如果被叫用户终端 12处于振铃状 态， 就处理代答业务， 如果被叫用户终端 12已经应答呼叫通话， 则终止代答 业务， 避免对被叫用户终端 12的通话造成影响。 在处理代答业务时， 被叫方 CP 22起到中转作用， 将主叫用户终端 11与代答用户终端 13的 SDP信息发 至对方， 从而接通主叫用户终端 11与代答用户终端 13的通话， 完成代答。 本实施例釆用呼叫分发模块 30, 即使代答用户终端 13和被叫用户终端 12不 在同一个 CP上， 也可以通过呼叫分发模块 30将代答方 CP 23的代答请求路 由到被叫方 CP 22, 由被叫方 CP 22起到中转作用， 接通主叫用户终端 11与 代答用户终端 13的通话， 在多 CP情况下轻松实现代答业务。
实施例六
如图 6所示，图 6为本发明实施例六的多 CP指定代答控制系统的结构示 意图。 本实施例以图 5所示实施例为基础， 增加了业务数据库 40。
代答方 CP 23用于： 接收代答用户终端 13发送的携带有被叫用户终端 12短号码的代答请求； 根据代答请求中携带的被叫用户终端 12短号码， 从 业务数据库 40中获取被叫用户终端 12短号码对应的被叫用户终端 12长号 码； 向呼叫分发模块 30发送携带有被叫用户终端 12长号码的代答请求； 呼叫分发模块 30用于，根据代答请求中携带的被叫用户终端 12长号码， 将代答请求转发至被叫用户终端 12对应的被叫方 CP 22;
被叫方 CP 22用于， 根据代答请求中携带的被叫用户终端 12长号码， 查 询被叫用户终端 12的当前状态。
在被叫用户终端 12振铃时， 代答用户终端 13拨打 "指定代答接入码 + 被叫用户终端 12短号码"发出代答请求。 此外， 也可通过拨打 "指定代答接 入码 +被叫用户终端 12长号码" 或 "指定代答接入码 +被叫用户终端 12特定 标识码"等方式发出代答请求。 代答方 CP 23在接收到被叫用户终端 12发送 的代答请求后， 可先判断代答请求是否合法， 当代答请求合法时， 则通过访 问各 CP公用的业务数据库 40 ,将被叫用户终端 12短号码转换为完整的被叫 用户终端 12长号码。 此外， 如果代答用户终端 13发送的代答请求中携带的 是被叫用户终端 12特定标识码， 则同样需要通过访问业务数据库 40, 将特 定标识码转换为长号码；如果代答用户终端 13发送的代答请求中携带的是被 叫用户终端 12长号码， 则无需再对其进行转换； 或代答方 CP 23直接将携带 短号码的代答请求发送到呼叫分发模块 30, 由呼叫分发模块 30从业务数据 库 40中查找长号码。 代答方 CP 23将代答请求中的短号码替换为长号码后， 再发送替换后的代答请求。 呼叫分发模块 30根据被叫用户终端 12长号码找 到被叫用户终端 12对应的被叫方 CP 22 , 并将代答请求路由到被叫用户终端 12对应的被叫方 CP 22上， 实现对呼叫信息的分发。 被叫方 CP 22根据长号 码查找到被叫用户终端 12, 并检测被叫用户终端 12的当前状态， 如果被叫 用户终端 12处于振铃状态， 就处理代答业务， 如果被叫用户终端 12已经应 答呼叫通话， 则终止代答业务， 避免对被叫用户终端 12的通话造成影响。 本 实施例在多 CP的情况下釆用呼叫分发模块 30,通过呼叫分发模块 30将代答 方 CP 23的代答请求路由到被叫方 CP 22 , 避免因代答用户终端 13和被叫用 户终端 12不在同一个 CP上而造成无法完成指定代答功能。
本发明实施例中， 代答方 CP 23还用于， 当被叫用户终端 12的当前状态 为振铃态时， 获取代答用户终端 13会话启动协议， 并发送至被叫方 CP 22; 在接收到被叫方 CP 22发送的主叫用户终端 11会话启动协议后，将主叫用户 终端 11会话启动协议转发至代答用户终端 13;
被叫方 CP 22还用于，在接收到代答方 CP 23发送的代答用户终端 13会 话启动协议后， 将代答用户终端 13会话启动协议转发至主叫方 CP 21 ; 在接 收到主叫方 CP 21发送的主叫用户终端 11会话启动协议后，将主叫用户终端 11会话启动协议转发至代答方 CP 23；
主叫方 CP 21还用于，在接收到被叫方 CP 22发送的代答用户终端 13会 话启动协议后， 将代答用户终端 13会话启动协议转发至主叫用户终端 11 ; 在主叫用户终端 11接收到代答用户终端 13会话启动协议后， 接收主叫用户 终端 11发送的主叫用户终端 11会话启动协议， 并转发至被叫方 CP 22。
在处理代答业务时， 被叫方 CP 22起到中转作用， 将代答用户终端 13会 话启动协议转发至主叫方 CP 21 , 并且将主叫用户终端 11会话启动协议转发 至代答方 CP 23 , 主叫用户终端 11接收到代答用户终端 13会话启动协议后， 且代答用户终端 13接收到主叫用户终端 11会话启动协议后， 双方即可实现 正常的通话接通， 在多 CP情况下轻松实现代答业务。 本发明实施例中， 被叫方 CP 22还用于， 当被叫用户终端 12的当前状态 为振铃态时， 从被叫用户终端 12获取呼叫码， 并发送携带有呼叫码的代答响 应至代答方 CP 23;在接收到代答方 CP 23发送的携带有呼叫码和代答用户终 端 13会话启动协议的接入请求后， 根据接入请求中的呼叫码， 释放被叫用户 终端 12的呼叫， 并发送携带有代答用户终端 13会话启动协议的呼叫响应至 主叫方 CP 21 ;
代答方 CP 23还用于， 在接收到被叫方 CP 22发送的携带有呼叫码的代 答响应后， 从代答请求中获取代答用户终端 13 会话启动协议， 并向被叫方 CP 22发送携带有呼叫码和代答用户终端 13会话启动协议的接入请求；
主叫方 CP 21还用于， 在接收到被叫方 CP 22发送的携带有代答用户终 端 13会话启动协议的呼叫响应后， 将携带有代答用户终端 13会话启动协议 的呼叫响应转发至主叫用户终端 11。
当被叫方 CP 22向代答方 CP 23发送代答响应时， 则表示被叫方 CP 22 同意代答用户终端 13代答。 由于在代答用户终端 13向代答方 CP 23发送代 答请求时， 代答请求中包含有代答用户终端 13会话启动协议， 因此在处理代 答业务时，代答方 CP 23可直接从代答请求中获取代答用户终端 13会话启动 协议， 并将被叫用户终端 12的呼叫码和代答用户终端 13会话启动协议添加 到接入请求中，发送至被叫方 CP 22。被叫方 CP 22根据呼叫码释放掉被叫用 户终端 12上的原有呼叫， 并用新的呼叫代替原有呼叫， 该新的呼叫即为代答 用户终端 13与主叫用户终端 11之间的呼叫。
本发明实施例中， 主叫方 CP 21还用于， 在主叫用户终端 11接收到携带 有代答用户终端 13会话启动协议的呼叫响应后， 接收主叫用户终端 11发送 的携带有主叫用户终端 11会话启动协议的主叫方接通响应，并转发至被叫方 CP 22;
被叫方 CP 22还用于， 在接收到主叫方 CP 21发送的携带有主叫用户终 端 11会话启动协议的主叫方接通响应后， 将携带有主叫用户终端 11会话启 动协议的主叫方接通响应转发至代答方 CP 23;
代答方 CP 23还用于， 在接收到被叫方 CP 22发送的携带有主叫用户终 端 11会话启动协议的主叫方接通响应后， 将携带有主叫用户终端 11会话启 动协议的主叫方接通响应转发至代答用户终端 13; 在代答用户终端 13接收 到所述携带有主叫用户终端 11会话启动协议的主叫方接通响应后，接收代答 用户终端 13发送的代答方接通响应， 并转发至被叫方 CP 22。
主叫用户终端 11接收到代答用户终端 13会话启动协议后， 将自身的主 叫用户终端 11会话启动协议发送出去，被叫方 CP 22在成功接收到主叫用户 终端 11会话启动协议后，即判定主叫用户终端 11同意代答用户终端 13代答。 被叫方 CP 22在成功接收到主叫方接通响应和代答方接通响应， 则说明主叫 用户终端 11和代答用户终端 13都已接收到对方的 SIP信息， 主叫用户终端 11和代答用户终端 13之间的通话已经接通，在多 CP情况下轻松实现代答业 务。
本发明实施例还提供一种代答方控制处理器 CP, 包括：
所述代答方 CP设置成： 向呼叫分发模块发送携带有被叫用户终端信息 的代答请求；
其中 ,所述呼叫分发模块根据所述代答请求中携带的被叫用户终端信息 , 将所述代答请求转发至被叫用户终端对应的被叫方 CP; 所述被叫方 CP根据 所述代答请求中携带的被叫用户终端信息， 查询所述被叫用户终端的当前状 态， 当所述被叫用户终端的当前状态为振铃态时， 接通主叫用户终端与代答 用户终端之间的通话。
可选地， 所述代答方 CP是设置成： 接收代答用户终端发送的携带有被 叫用户终端短号码的代答请求； 根据所述代答请求中携带的被叫用户终端短 号码， 从业务数据库中获取所述被叫用户终端短号码对应的被叫用户终端长 号码； 以及向所述呼叫分发模块发送携带有所述被叫用户终端长号码的代答 请求。
可选地， 所述代答方 CP还设置成： 当所述被叫用户终端的当前状态为 振铃态时， 获取代答用户终端会话启动协议， 并发送至被叫方 CP; 在接收到 所述被叫方 CP发送的主叫用户终端会话启动协议后， 将所述主叫用户终端 会话启动协议转发至所述代答用户终端；
可选地， 所述代答请求包含有所述代答用户终端会话启动协议； 以及 所述代答方 CP还设置成：在接收到所述被叫方 CP发送的携带有呼叫码 的代答响应后， 从所述代答请求中获取所述代答用户终端会话启动协议， 并 向所述被叫方 CP发送携带有所述呼叫码和所述代答用户终端会话启动协议 的接入请求。
可选地， 所述代答方 CP还设置成： 在接收到所述被叫方 CP发送的携带 有主叫用户终端会话启动协议的主叫方接通响应后， 将所述携带有主叫用户 终端会话启动协议的主叫方接通响应转发至所述代答用户终端； 在所述代答 用户终端接收到所述携带有主叫用户终端会话启动协议的主叫方接通响应 后 ,接收所述代答用户终端发送的代答方接通响应 ,并转发至所述被叫方 CP。
本发明实施例还提供一种代答业务应用服务器， 包括： 呼叫分发模块， 所述呼叫分发模块设置成： 根据所述代答请求中携带的被叫用户终端信 息， 将所述代答请求转发至被叫用户终端对应的被叫方 CP;
其中， 所述被叫用户终端信息包括被叫用户终端长号码； 以及
所述代答请求由代答方 CP 向所述呼叫分发模块发送， 并携带有被叫用 户终端信息。
本发明实施例还提供一种主叫方控制处理器 CP, 包括：
所述主叫方 CP设置成：在接收到被叫方 CP发送的代答用户终端会话启 动协议后， 将代答用户终端会话启动协议转发至主叫用户终端； 在所述主叫 用户终端接收到所述代答用户终端会话启动协议后， 接收所述主叫用户终端 发送的主叫用户终端会话启动协议， 并转发至所述被叫方 CP。
可选地， 所述主叫方 CP还设置成： 在接收到所述被叫方 CP发送的携带 有代答用户终端会话启动协议的呼叫响应后， 将所述携带有代答用户终端会 话启动协议的呼叫响应转发至所述主叫用户终端。 可选地， 所述主叫方 CP还设置成： 在所述主叫用户终端接收到所述携 带有代答用户终端会话启动协议的呼叫响应后， 接收所述主叫用户终端发送 的携带有主叫用户终端会话启动协议的主叫方接通响应， 并转发至所述被叫 方 CP。
本发明实施例还提供一种被叫方控制处理器 CP, 包括：
所述被叫方 CP设置成： 根据代答请求中携带的被叫用户终端信息， 查 询所述被叫用户终端的当前状态；
当所述被叫用户终端的当前状态为振铃态时， 接通主叫用户终端与代答 用户终端之间的通话；
其中， 所述被叫用户终端信息包括被叫用户终端长号码； 以及
所述代答请求由代答方 CP 向呼叫分发模块发送， 并携带有被叫用户终 端信息； 呼叫分发模块根据所述代答请求中携带的被叫用户终端信息， 将所 述代答请求转发至被叫用户终端对应的被叫方 CP。
可选地， 所述被叫方 CP还设置成： 在接收到代答方 CP发送的代答用户 终端会话启动协议后， 将所述代答用户终端会话启动协议转发至主叫方 CP; 在接收到所述主叫方 CP发送的主叫用户终端会话启动协议后， 将所述主叫 用户终端会话启动协议转发至所述代答方 CP。
可选地， 所述被叫方 CP还设置成： 当所述被叫用户终端的当前状态为 振铃态时， 从所述被叫用户终端获取呼叫码， 并发送携带有所述呼叫码的代 答响应至所述代答方 CP; 在接收到所述代答方 CP发送的携带有所述呼叫码 和所述代答用户终端会话启动协议的接入请求后， 根据所述接入请求中的呼 叫码， 释放所述被叫用户终端的呼叫， 并发送携带有代答用户终端会话启动 协议的呼叫响应至所述主叫方 CP。
可选地， 所述被叫方 CP还设置成： 在接收到所述主叫方 CP发送的携带 有主叫用户终端会话启动协议的主叫方接通响应后， 将所述携带有主叫用户 终端会话启动协议的主叫方接通响应转发至所述代答方 CP。 以上所述仅为本发明的优选实施例， 并非因此限制本发明的专利范围， 凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换， 或直接 或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。
工业实用性
本发明实施例中， 可以通过呼叫分发模块将代答方 CP 的代答请求路由 到被叫方 CP, 由被叫方 CP起到中转作用， 接通主叫用户终端与代答用户终 端的通话， 完成代答。

Claims

权 利 要 求 书
1、 一种多控制处理器 CP指定代答控制方法， 包括：
代答方 CP向呼叫分发模块发送携带有被叫用户终端信息的代答请求； 所述呼叫分发模块根据所述代答请求中携带的被叫用户终端信息 , 将所 述代答请求转发至被叫用户终端对应的被叫方 CP;
所述被叫方 CP根据所述代答请求中携带的被叫用户终端信息， 查询所 述被叫用户终端的当前状态； 以及
当所述被叫用户终端的当前状态为振铃态时， 所述被叫方 CP接通主叫 用户终端与代答用户终端之间的通话。
2、 根据权利要求 1所述的方法， 其中，
所述代答方 CP 向呼叫分发模块发送携带有被叫用户终端信息的代答请 求包括：
所述代答方 CP接收所述代答用户终端发送的携带有被叫用户终端短号 码的代答请求；
所述代答方 CP根据所述代答请求中携带的被叫用户终端短号码， 从业 务数据库中获取所述被叫用户终端短号码对应的被叫用户终端长号码； 以及 所述代答方 CP 向所述呼叫分发模块发送携带有所述被叫用户终端长号 码的代答请求；
所述呼叫分发模块根据所述代答请求中携带的被叫用户终端信息 , 将所 述代答请求转发至被叫用户终端对应的被叫方 CP包括：
所述呼叫分发模块根据所述代答请求中携带的被叫用户终端长号码， 将 所述代答请求转发至所述被叫用户终端对应的被叫方 CP;
所述被叫方 CP根据所述代答请求中携带的被叫用户终端信息， 查询所 述被叫用户终端的当前状态包括：
所述被叫方 CP根据所述代答请求中携带的被叫用户终端长号码， 查询 所述被叫用户终端的当前状态。
3、 根据权利要求 1或 2所述的方法， 其中， 所述当所述被叫用户终端的当前状态为振铃态时， 所述被叫方 CP接通 主叫用户终端与代答用户终端之间的通话包括：
当所述被叫用户终端的当前状态为振铃态时， 所述代答方 CP获取代答 用户终端会话启动协议， 并发送至所述被叫方 CP, 由被叫方 CP转发至主叫 方 CP, 再由所述主叫方 CP转发至所述主叫用户终端； 以及
在所述主叫用户终端接收到所述代答用户终端会话启动协议后， 所述主 叫方 CP接收所述主叫用户终端发送的主叫用户终端会话启动协议， 并转发 至所述被叫方 CP,并由所述被叫方 CP转发至所述代答方 CP,再由所述代答 方 CP转发至所述代答用户终端。
4、 根据权利要求 3所述的方法， 其中， 所述代答请求包含有所述代答用 户终端会话启动协议；
所述当所述被叫用户终端的当前状态为振铃态时， 所述代答方 CP获取 代答用户终端会话启动协议， 并发送至所述被叫方 CP, 由被叫方 CP转发至 主叫方 CP, 再由所述主叫方 CP转发至所述主叫用户终端包括：
当所述被叫用户终端的当前状态为振铃态时， 所述被叫方 CP从所述被 叫用户终端获取呼叫码， 并发送携带有所述呼叫码的代答响应至所述代答方
CP;
所述代答方 CP从所述代答请求中获取所述代答用户终端会话启动协议， 并向所述被叫方 CP发送携带有所述呼叫码和所述代答用户终端会话启动协 议的接入请求；
所述被叫方 CP根据所述接入请求中的所述呼叫码， 释放所述被叫用户 终端的呼叫， 并发送携带有代答用户终端会话启动协议的呼叫响应至所述主 叫方 CP; 以及
所述主叫方 CP将所述携带有代答用户终端会话启动协议的呼叫响应转 发至所述主叫用户终端。
5、 根据权利要求 4所述的方法， 其中， 所述在所述主叫用户终端接收到 所述代答用户终端会话启动协议后， 所述主叫方 CP接收所述主叫用户终端 发送的主叫用户终端会话启动协议， 并转发至所述被叫方 CP, 并由所述被叫 方 CP转发至所述代答方 CP, 再由所述代答方 CP转发至所述代答用户终端 包括：
在所述主叫用户终端接收到所述携带有代答用户终端会话启动协议的呼 叫响应后， 所述主叫方 CP接收所述主叫用户终端发送的携带有主叫用户终 端会话启动协议的主叫方接通响应， 并转发至所述被叫方 CP;
所述被叫方 CP将所述携带有主叫用户终端会话启动协议的主叫方接通 响应转发至所述代答方 CP, 并由所述代答方 CP转发至所述代答用户终端； 以及
在所述代答用户终端接收到所述携带有主叫用户终端会话启动协议的主 叫方接通响应后， 所述代答方 CP接收所述代答用户终端发送的代答方接通 响应， 并转发至所述被叫方 CP。
6、 一种多控制处理器 CP指定代答控制系统， 包括： 主叫方 CP、 被叫方 CP、 代答方 CP和呼叫分发模块， 其中：
所述代答方 CP设置成： 向所述呼叫分发模块发送携带有被叫用户终端 信息的代答请求；
所述呼叫分发模块设置成： 根据所述代答请求中携带的被叫用户终端信 息， 将所述代答请求转发至被叫用户终端对应的被叫方 CP; 以及
所述被叫方 CP设置成： 根据所述代答请求中携带的被叫用户终端信息， 查询所述被叫用户终端的当前状态； 当所述被叫用户终端的当前状态为振铃 态时， 接通主叫用户终端与代答用户终端之间的通话。
7、 根据权利要求 6所述的系统， 还包括： 业务数据库； 其中，
所述代答方 CP是设置成： 接收所述代答用户终端发送的携带有被叫用 户终端短号码的代答请求；根据所述代答请求中携带的被叫用户终端短号码， 从所述业务数据库中获取所述被叫用户终端短号码对应的被叫用户终端长号 码； 以及向所述呼叫分发模块发送携带有所述被叫用户终端长号码的代答请 求；
所述呼叫分发模块是设置成： 根据所述代答请求中携带的被叫用户终端 长号码， 将所述代答请求转发至所述被叫用户终端对应的被叫方 CP; 以及 所述被叫方 CP是设置成： 根据所述代答请求中携带的被叫用户终端长 号码， 查询所述被叫用户终端的当前状态。
8、 根据权利要求 6或 7所述的系统， 其中，
所述代答方 CP还设置成： 当所述被叫用户终端的当前状态为振铃态时， 获取代答用户终端会话启动协议， 并发送至所述被叫方 CP; 在接收到所述被 叫方 CP发送的主叫用户终端会话启动协议后， 将所述主叫用户终端会话启 动协议转发至所述代答用户终端；
所述被叫方 CP还设置成：在接收到所述代答方 CP发送的代答用户终端 会话启动协议后， 将所述代答用户终端会话启动协议转发至所述主叫方 CP; 在接收到所述主叫方 CP发送的主叫用户终端会话启动协议后， 将所述主叫 用户终端会话启动协议转发至所述代答方 CP; 以及
所述主叫方 CP设置成：在接收到所述被叫方 CP发送的代答用户终端会 话启动协议后，将所述代答用户终端会话启动协议转发至所述主叫用户终端； 在所述主叫用户终端接收到所述代答用户终端会话启动协议后， 接收所述主 叫用户终端发送的主叫用户终端会话启动协议， 并转发至所述被叫方 CP。
9、 根据权利要求 8所述的系统， 其中，
所述代答请求包含有所述代答用户终端会话启动协议；
所述被叫方 CP还设置成： 当所述被叫用户终端的当前状态为振铃态时， 从所述被叫用户终端获取呼叫码， 并发送携带有所述呼叫码的代答响应至所 述代答方 CP; 在接收到所述代答方 CP发送的携带有所述呼叫码和所述代答 用户终端会话启动协议的接入请求后， 根据所述接入请求中的呼叫码， 释放 所述被叫用户终端的呼叫， 并发送携带有代答用户终端会话启动协议的呼叫 响应至所述主叫方 CP;
所述代答方 CP还设置成：在接收到所述被叫方 CP发送的携带有所述呼 叫码的代答响应后，从所述代答请求中获取所述代答用户终端会话启动协议， 并向所述被叫方 CP发送携带有所述呼叫码和所述代答用户终端会话启动协 议的接入请求； 以及
所述主叫方 CP还设置成：在接收到所述被叫方 CP发送的携带有代答用 户终端会话启动协议的呼叫响应后， 将所述携带有代答用户终端会话启动协 议的呼叫响应转发至所述主叫用户终端。
10、 根据权利要求 9所述的系统， 其中，
所述主叫方 CP还设置成： 在所述主叫用户终端接收到所述携带有代答 用户终端会话启动协议的呼叫响应后， 接收所述主叫用户终端发送的携带有 主叫用户终端会话启动协议的主叫方接通响应， 并转发至所述被叫方 CP; 所述被叫方 CP还设置成：在接收到所述主叫方 CP发送的携带有主叫用 户终端会话启动协议的主叫方接通响应后， 将所述携带有主叫用户终端会话 启动协议的主叫方接通响应转发至所述代答方 CP; 以及
所述代答方 CP还设置成：在接收到所述被叫方 CP发送的携带有主叫用 户终端会话启动协议的主叫方接通响应后， 将所述携带有主叫用户终端会话 启动协议的主叫方接通响应转发至所述代答用户终端； 在所述代答用户终端 接收到所述携带有主叫用户终端会话启动协议的主叫方接通响应后， 接收所 述代答用户终端发送的代答方接通响应， 并转发至所述被叫方 CP。
11、 一种代答方控制处理器 CP, 包括：
所述代答方 CP设置成： 向呼叫分发模块发送携带有被叫用户终端信息 的代答请求，
其中 ,所述呼叫分发模块根据所述代答请求中携带的被叫用户终端信息 , 将所述代答请求转发至被叫用户终端对应的被叫方 CP; 所述被叫方 CP根据 所述代答请求中携带的被叫用户终端信息， 查询所述被叫用户终端的当前状 态， 当所述被叫用户终端的当前状态为振铃态时， 接通主叫用户终端与代答 用户终端之间的通话。
12、 根据权利要求 11所述的代答方 CP, 其中，
所述代答方 CP是设置成： 接收代答用户终端发送的携带有被叫用户终 端短号码的代答请求； 根据所述代答请求中携带的被叫用户终端短号码， 从 业务数据库中获取所述被叫用户终端短号码对应的被叫用户终端长号码； 以 及向所述呼叫分发模块发送携带有所述被叫用户终端长号码的代答请求。
13、 根据权利要求 11或 12所述的代答方 CP, 其中， 所述代答方 CP还设置成： 当所述被叫用户终端的当前状态为振铃态时， 获取代答用户终端会话启动协议， 并发送至被叫方 CP; 在接收到所述被叫方 CP发送的主叫用户终端会话启动协议后，将所述主叫用户终端会话启动协议 转发至所述代答用户终端。
14、 根据权利要求 13所述的代答方 CP, 其中，
所述代答请求包含有所述代答用户终端会话启动协议； 以及
所述代答方 CP还设置成：在接收到所述被叫方 CP发送的携带有呼叫码 的代答响应后， 从所述代答请求中获取所述代答用户终端会话启动协议， 并 向所述被叫方 CP发送携带有所述呼叫码和所述代答用户终端会话启动协议 的接入请求。
15、 根据权利要求 14所述的代答方 CP, 其中，
所述代答方 CP还设置成：在接收到所述被叫方 CP发送的携带有主叫用 户终端会话启动协议的主叫方接通响应后， 将所述携带有主叫用户终端会话 启动协议的主叫方接通响应转发至所述代答用户终端； 在所述代答用户终端 接收到所述携带有主叫用户终端会话启动协议的主叫方接通响应后， 接收所 述代答用户终端发送的代答方接通响应， 并转发至所述被叫方 CP。
16、 一种代答业务应用服务器， 包括： 呼叫分发模块，
所述呼叫分发模块设置成： 根据代答请求中携带的被叫用户终端信息， 将所述代答请求转发至被叫用户终端对应的被叫方 CP;
其中， 所述被叫用户终端信息包括被叫用户终端长号码； 以及
所述代答请求由代答方 CP 向所述呼叫分发模块发送， 并携带有被叫用 户终端信息。
17、 一种主叫方控制处理器 CP, 包括：
所述主叫方 CP设置成：在接收到被叫方 CP发送的代答用户终端会话启 动协议后， 将代答用户终端会话启动协议转发至主叫用户终端； 在所述主叫 用户终端接收到所述代答用户终端会话启动协议后， 接收所述主叫用户终端 发送的主叫用户终端会话启动协议， 并转发至所述被叫方 CP。
18、 根据权利要求 17所述的主叫方 CP, 其中， 所述主叫方 CP还设置成：在接收到所述被叫方 CP发送的携带有代答用 户终端会话启动协议的呼叫响应后， 将所述携带有代答用户终端会话启动协 议的呼叫响应转发至所述主叫用户终端。
19、 根据权利要求 18所述的主叫方 CP, 其中，
所述主叫方 CP还设置成： 在所述主叫用户终端接收到所述携带有代答 用户终端会话启动协议的呼叫响应后， 接收所述主叫用户终端发送的携带有 主叫用户终端会话启动协议的主叫方接通响应， 并转发至所述被叫方 CP。
20、 一种被叫方控制处理器 CP, 包括：
所述被叫方 CP设置成： 根据代答请求中携带的被叫用户终端信息， 查 询所述被叫用户终端的当前状态；
当所述被叫用户终端的当前状态为振铃态时， 接通主叫用户终端与代答 用户终端之间的通话；
其中， 所述被叫用户终端信息包括被叫用户终端长号码；
所述代答请求由代答方 CP 向呼叫分发模块发送， 并携带有被叫用户终 端信息； 呼叫分发模块根据所述代答请求中携带的被叫用户终端信息， 将所 述代答请求转发至被叫用户终端对应的被叫方 CP。
21、 根据权利要求 20所述的被叫方 CP, 其中，
所述被叫方 CP还设置成：在接收到代答方 CP发送的代答用户终端会话 启动协议后， 将所述代答用户终端会话启动协议转发至主叫方 CP; 在接收到 所述主叫方 CP发送的主叫用户终端会话启动协议后， 将所述主叫用户终端 会话启动协议转发至所述代答方 CP。
22、 根据权利要求 21所述的被叫方 CP, 其中，
所述被叫方 CP还设置成： 当所述被叫用户终端的当前状态为振铃态时， 从所述被叫用户终端获取呼叫码， 并发送携带有所述呼叫码的代答响应至所 述代答方 CP; 在接收到所述代答方 CP发送的携带有所述呼叫码和所述代答 用户终端会话启动协议的接入请求后， 根据所述接入请求中的呼叫码， 释放 所述被叫用户终端的呼叫， 并发送携带有代答用户终端会话启动协议的呼叫 响应至所述主叫方 CP。
23、 根据权利要求 22所述的被叫方 CP, 其中，
所述被叫方 CP还设置成：在接收到所述主叫方 CP发送的携带有主叫用 户终端会话启动协议的主叫方接通响应后， 将所述携带有主叫用户终端会话 启动协议的主叫方接通响应转发至所述代答方 CP。
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