WO2017219939A1 - Procédé de mise en œuvre de commutation de service, serveur d'application, système, et support de stockage - Google Patents

Procédé de mise en œuvre de commutation de service, serveur d'application, système, et support de stockage Download PDF

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Publication number
WO2017219939A1
WO2017219939A1 PCT/CN2017/088963 CN2017088963W WO2017219939A1 WO 2017219939 A1 WO2017219939 A1 WO 2017219939A1 CN 2017088963 W CN2017088963 W CN 2017088963W WO 2017219939 A1 WO2017219939 A1 WO 2017219939A1
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WIPO (PCT)
Prior art keywords
service
terminal
switching
call
message
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PCT/CN2017/088963
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English (en)
Chinese (zh)
Inventor
屈天喜
钱晨
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中兴通讯股份有限公司
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Publication of WO2017219939A1 publication Critical patent/WO2017219939A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold

Definitions

  • the present disclosure relates to the field of communications technologies, and relates to a method, an application server, a system, and a storage medium for implementing service switching.
  • the blind transfer belongs to the call switching service.
  • the main meaning of the blind transfer is that when any user A makes a call with the service user B, the user B performs the transfer operation and carries the number information of any user C.
  • AS Application Server
  • the existing blind transfer technology generally has the following three implementation methods:
  • the terminal corresponding to the user B is a higher-level SIP (Session Initiation Protocol) terminal and has the capability of sending a REFER message.
  • the REFER carries the number of the user C to the AS, and the AS releases the user B. And call user C, and associate user A with user C to achieve blind transfer.
  • the terminal corresponding to user B has the ability of two-way call, and can make a new call on the basis of already talking.
  • the requested called number is the blind transfer service operation code plus the number of user C, and is recorded by the AS in advance.
  • User B and user A correspond to the call information of the call, and the AS releases user B and calls user C, and associates user A with user C to implement blind transfer.
  • the WEB server sends a message carrying the user's C number to the AS, which can be applied to a service function such as a click-to-dial or a switchboard agent.
  • the AS releases the user B and calls the user C, and associates the user A with the user C to implement a blind transfer.
  • the first two methods have higher requirements on the terminal.
  • the terminal needs to support special buttons and has the ability to send refer messages, or the terminal needs to support two-way calls.
  • the latter method requires WEB server support, and a new network needs to be set up in the network. Meta device.
  • the main technical problem to be solved by the embodiments of the present disclosure is to provide a method, an application server, a system, and a storage medium for implementing service switching, and to solve the related art, adopting a higher-level terminal or setting up a WEB server to bring the user terminal and the network
  • the cost of the equipment is increased, the utility is poor, and the adaptability is poor.
  • an embodiment of the present disclosure provides a method for implementing service switching, including:
  • the media maintenance negotiation terminal When the service trigger message carries the preset key service feature code, the media maintenance negotiation terminal performs a media negotiation of the call hold and play service, and controls the media server to play the call hold tone for the service hold terminal;
  • the service switching message is parsed to obtain the switching service parameter, and the terminal corresponding to the switching service performs service switching and media negotiation according to the switching service parameter, and controls the media server to perform corresponding playback on the terminal corresponding to the switching service.
  • an optional embodiment of the present disclosure further provides an application server that implements service switching, including:
  • a receiving module configured to receive a service trigger message reported by the service switching terminal in the call, and receive a service switching message reported by the service switching terminal in the call;
  • the service trigger message is a trigger button signal conversion processing according to the service switching terminal a message generated after the message switching message is generated according to the switching button signal of the service switching terminal;
  • the control module is configured to: when the service trigger message carries the preset button service feature code, negotiate with the media in the call to maintain the call hold service of the service, and control the media server to play the call hold tone for the service hold terminal. And performing the service switching message Parsing, obtaining a handover service parameter; performing service switching and media negotiation on the terminal corresponding to the handover service according to the handover service parameter, and controlling the media server to perform corresponding playback on the terminal corresponding to the handover service.
  • an optional embodiment of the present disclosure further provides a system for implementing service switching, including: a media server and an application server as above;
  • the application server and the media server perform the media negotiation of the handover service, and the media server is configured to send the media stream to the terminal corresponding to the handover service according to the media negotiation performed by the application server and the terminal corresponding to the handover service.
  • an optional embodiment of the present disclosure further provides a storage medium, where the storage medium includes a stored program, wherein the foregoing program executes the foregoing method for implementing service switching.
  • the embodiment of the present disclosure discloses a method, an application server, a system, and a storage medium for implementing service switching.
  • the service trigger message reported by the service switching terminal can be received, and the media server is controlled to play the call hold tone for the service holding terminal.
  • the media server is controlled to play the call hold tone for the service holding terminal.
  • continue to receive the service switching message reported by the service switching terminal obtain the switching service parameter, perform service switching and media negotiation with the terminal corresponding to the switching service, implement association between the two terminals, and re-establish a call between the two terminals.
  • the existing terminal and the network element device are utilized, which is equivalent to the related technology that needs to adopt an advanced terminal, or a solution for setting a WEB server.
  • the present disclosure can be implemented without changing existing terminals and networks. Therefore, the present disclosure obviously has better adaptability and practicability, expands the extensive application, saves the cost of deploying the network, and improves the user experience.
  • FIG. 1 is a flowchart of a method for implementing service switching according to an optional embodiment 1;
  • FIG. 2 is a flowchart of another method for implementing service switching according to an alternative embodiment 2;
  • FIG. 3 is a flow chart of a method for converting a button signal into an INFO signal according to an alternative embodiment 2;
  • FIG. 4 is a flow chart of another method for converting a button signal into an INFO signal according to an alternative embodiment 2;
  • FIG. 5 is a flowchart of a method for implementing blind transfer according to an alternative embodiment 2;
  • FIG. 6 is a schematic diagram of a module of an application server for implementing service switching according to an alternative embodiment 3;
  • FIG. 7 is a schematic block diagram of a system for implementing service switching according to an optional third embodiment.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides a method for implementing service switching.
  • the method can enable any one of the two parties to initiate and implement service switching during the call, and complete the blind transfer.
  • the method of the present disclosure does not require the terminal to have the ability to support special buttons (*, #, 0-9, and has the ability to send a refer message; nor does it require terminal support.
  • the CS Circuit
  • the convergence of the network and the packet switching (PS) network makes the service provided by this embodiment have a very broad development and use space.
  • the method for implementing service switching includes:
  • S101 Receive a service trigger message reported by the service switching terminal in the call, where the service trigger message is a message generated after the conversion of the trigger button signal of the service switching terminal;
  • the media maintenance negotiation terminal performs a media negotiation of the call hold and play service, and controls the media server to play the call hold tone for the service hold terminal.
  • S103 Receive a service switching message reported by the service switching terminal in the call, where the service switching message is a message generated after the switching of the switching button signal of the service switching terminal;
  • S104 Parsing the service switching message to obtain a handover service parameter, performing service switching and media negotiation on the terminal corresponding to the handover service according to the handover service parameter, and controlling the media server to perform corresponding playback on the terminal corresponding to the handover service.
  • the service switching terminal and the service holding terminal are user terminals in the current call, and are devices for initiating a call, answering a call, and performing other call operations
  • the user equipment User Equipment, UE
  • Terminal devices such as a network mobile phone, a PSTN terminal, and an IMS terminal are not limited in this embodiment.
  • a service switching terminal can be understood as a terminal that actively initiates a switching service during a call, that is, a terminal that initiates a service switching by a user operating a button during a call.
  • a service holding terminal is understood as a terminal that talks with a service switching terminal during the same call. There may be multiple service holding terminals. For example, in a multi-party call, other terminals except the service switching terminal may be regarded as a service holding terminal.
  • the service switching terminal may be a calling terminal or a called terminal, which is not limited in this embodiment.
  • the user switching service terminal is the user B, and the operation service holding terminal is the user A. It is conceivable that in step S101, the user B triggers the button on the service switching terminal during the call with the user A.
  • the switch terminal forms a trigger button signal according to the button triggered by the user.
  • the trigger button signal includes the button number triggered by the user B.
  • the button numbers include, but are not limited to, numbers such as *, #, 0-9.
  • different switching service parameters (corresponding to the button number input by the user's button) can be specified for different switching services.
  • the length and composition of the service parameters can be set arbitrarily. For example, *77 is set as the switching service parameter corresponding to the blind transfer service.
  • the button When user B is in the process of talking with user A, the button is triggered and the button number *77 is input.
  • the operation of the blind transfer service is triggered, and the service switching terminal can automatically generate a switch button signal according to the button number, and the switch button signal includes but is not limited to a signal such as a DTMF (Double Tone Multi Frequency) signal.
  • DTMF Double Tone Multi Frequency
  • the AS generally provides the underlying service capabilities, such as call control, status reporting, and bill generation.
  • the AS and the UE can communicate with each other through the core network using the SIP protocol.
  • the SIP protocol Session initiation Protocol
  • the service abbreviated as the SIP protocol, the session initiation protocol, and the like. Therefore, it is conceivable that the service trigger message of the embodiment conforms to the requirements of the SIP protocol, and the message carries the information of the button number triggered by the user.
  • the trigger button signal obtained after the service switching terminal receives the user trigger button number is generally a DTMF signal, in the process of S101, there is necessarily a process of converting the trigger button signal of the service switching terminal to generate an AS identifiable message.
  • the trigger button signal may be converted by the core network between the terminal and the application server, or may be converted by other network element devices, which is not limited in this embodiment.
  • the service triggering message After receiving the service triggering message, the service triggering message needs to be parsed to determine whether the service triggering message carries the preset key service feature code. Therefore, it can be determined that, in step S101, the last reported service trigger message includes a button service feature code, and the button service feature code is converted by the trigger button signal.
  • the correspondence between each trigger button signal and the button service feature code may be pre-stored in the device that implements the conversion.
  • the service switching terminal needs to perform corresponding service switching processing, but for the service holding terminal, it is also necessary to avoid the hang up and need to keep it in the calling state. In view of this, it is necessary to play the call to the service holding terminal in the call. Keep the tone, prompting user A to be in the call hold state, no need to hang up.
  • the playback of the call hold prompt tone requires the cooperation of a Media Resource Server (MRS), and the MRS has the capability of providing voice media, such as playing a call hold tone to the held party user during the call hold process. Etc., generally referred to as Media Server (MS).
  • MRS Media Resource Server
  • step S102 after determining that the service trigger message carries the preset button service feature code, the media maintenance negotiation of the call holding and playing service needs to be performed with the service holding terminal in the call, where media negotiation can be understood as After obtaining the media information of the service holding terminal, after obtaining the media information of the service holding terminal, the media server MRS can be controlled to play the call holding prompt tone to the service holding terminal UE according to the media information.
  • the process of controlling the above media negotiation is performed by the AS, and the AS and the MRS usually use the SIP protocol or the MGCP protocol (Media Gateway Control Protocol), which is determined by the protocol type supported by the MRS. .
  • the UE and the MRS are the media stream transmission, the codec format, the transceiver port, the bandwidth transmission rate and the like of the media packet between the UE and the MRS, according to the call, between the terminal UE and the MRS.
  • the media negotiated is the media stream transmission, the codec format, the transceiver port, the bandwidth transmission rate and the like of the media packet between the UE and the MRS, according to the call, between the terminal UE and the MRS.
  • the service switching terminal may report the service switching message, and the service switching message is a message generated after the switching of the switching button signal of the service switching terminal.
  • the service switching message is a message generated after the switching of the switching button signal of the service switching terminal.
  • the user B needs to input a button number again, and the button number is generally corresponding to the service.
  • the button number is generally corresponding to the service.
  • the user can input a corresponding button number according to the need, and the service switching terminal generates a corresponding switching button signal according to the button number.
  • the type of the switching button signal includes but is not limited to the DTMF signal.
  • the switching button signal needs to be converted to generate a service switching message, and then sent.
  • the network element that processes the service switching message is the AS of the service switching terminal.
  • the service corresponding to the service switching message may also be other services except the call-holding service and the blind-switching service, which is not limited in this embodiment.
  • the service switching message After receiving the service switching message, the service switching message is parsed, and the switching service parameter can be obtained.
  • the switching service parameter herein can be understood as the identification code of a switching service.
  • the one-to-one correspondence with the switching service therefore, in step S102, the understanding of the service switching message further includes: the service switching message includes a switching service parameter, where the switching service parameter is converted by the switching button signal, in order to facilitate the
  • the fast implementation of the conversion process may pre-store the correspondence between the switching key signal and the switching service parameter in the device that implements the conversion.
  • the content of the handover service and the terminal that is operated may be determined.
  • the terminal corresponding to the handover service may perform service switching and media negotiation according to the handover service parameter, and control the media.
  • the server performs corresponding playback on the terminal corresponding to the handover service.
  • the control media server here performs corresponding playback on the terminal corresponding to the handover service, which should be controlled to control the media server to control the playback state of the terminal corresponding to the handover service, for example, corresponding to the handover service.
  • the terminal plays the corresponding prompt tone recorded in advance, or directly plays the null tone. For example, when the terminal corresponding to the handover service is currently in the playback state, the media server is controlled to stop the playback of the terminal.
  • the service switching message and the service triggering message may be the session initial protocol information message, that is, the INFO message of the SIP protocol, and the INFO messages are respectively obtained by converting the switching button signal and the trigger button signal of the service switching terminal by the core network. It is conceivable that there may be more than one button number input by a user corresponding to a service trigger or a service switch, so there may be multiple corresponding switch button signals and trigger button signals.
  • the service switching message and the service trigger message may also be other types of SIP-compliant messages, as long as the type of message can be identified by the AS.
  • the INFO message may be a one-trigger or one-switch corresponding message generated by all key signal conversions.
  • the core network converts all the key signals into the same INFO message and forwards them to the AS. .
  • the core network may directly write the key service feature code into the INFO message when generating the corresponding INFO message according to the corresponding relationship between the trigger button signal and the button service feature code; in addition, the core network may also be only in the INFO
  • the trigger button signal is written in the message, and the AS determines the corresponding button service feature code according to the parsed multiple trigger button signals.
  • the core network may directly write the handover service parameter into the INFO message and send it to the AS when generating the INFO message according to the correspondence between the handover button signal and the handover service parameter.
  • the core network can also convert only a plurality of switch key signals into an INFO message, send it to the AS, and parse the switch button signal by the AS, according to the pre-stored cut. The relationship between the button signal and the switching service parameter is changed, and the corresponding switching service parameter is obtained according to the switching button signal.
  • the INFO message may also be a message generated after a key signal conversion.
  • the button signal is converted into an INFO message and sent to the AS, so the INFO is received.
  • the device side that is, the AS, also needs to merge the INFO messages converted by the key signals, and parse the combined INFO messages to obtain the button numbers corresponding to the multiple keys to determine whether the corresponding service is a trigger service or a handover service, and Which service is switched in the service.
  • the content of the handover service parameter carried in the service switching message determines the object negotiated by the terminal and the media for subsequent service switching.
  • the handover service parameters of this embodiment include, but are not limited to, the call cancellation service parameter and the blind transfer service parameter.
  • the release call service parameter is used to indicate that the current service is to cancel the call hold, and the operation object is the service hold terminal in the call hold.
  • the blind transfer service parameter is used to indicate that the current service is a blind transfer service, and the terminal that is in communication with the service hold terminal needs to be transferred from the service switching terminal to the outreach terminal.
  • the terminal to be operated is different, for example, when the contact call hold service is performed, the terminal that is operated is the service hold terminal A, and when the blind transfer service is executed, the number of the outreach terminal needs to be determined, so this embodiment
  • the terminal can also be identified according to the number of the terminal.
  • the handover service parameters of this embodiment include, but are not limited to, a handover service code and/or an outreach terminal number.
  • the switching service is to cancel the call holding service, the service switching parameter input by the user may be only a switching service code such as *81.
  • the switching service corresponding to the switching service code is to cancel the call holding and reply to the current call;
  • the service switching parameter input by the user may be the number of the third terminal, and the call of the service switching terminal is transferred to the third terminal by default.
  • the user may also input the switching service code plus the third terminal.
  • the service switching parameter in the format of the number, the switching service code indicates that the switching service is a blind transfer, and the number indicates the calling number of the transferred terminal.
  • step S104 the terminal corresponding to the handover service performs service switching and media negotiation according to the handover service parameter, and controls the media server to perform corresponding playback on the terminal corresponding to the handover service.
  • the control media server stops the playing of the call holding tone for the service holding terminal, associates the service switching terminal with the service holding terminal, and controls the service holding terminal and the service switching terminal to perform a call state.
  • the switching service parameter is a blind-transfer service parameter
  • the communication between the service switching terminal and the service holding terminal is converted into communication between the service holding terminal and the external terminal.
  • Step S104 includes: a first step: releasing the service switching terminal, and controlling the media server to stop playing the call holding tone for the service holding terminal;
  • the second step is: performing an outreach terminal corresponding to the blind transfer service, performing media negotiation with the external terminal and the service holding terminal, and controlling the media server to perform corresponding playback on the external terminal and the service maintenance terminal;
  • the third step is: receiving the off-hook signal of the outreach terminal, controlling the media server to stop playing the service to the terminal, and performing media negotiation with the outreach terminal and the service holding terminal respectively, and associating the outreach terminal with the service holding terminal, and controlling the same Enter the call state.
  • the service switching terminal After the service switching terminal is released, the service switching terminal ends the call, and the outreach terminal corresponding to the blind forwarding service is called.
  • the second step after the external terminal corresponding to the blind transfer service is called, media negotiation is performed with the external terminal and the service holding terminal respectively, so as to control the ringing of the external terminal, and control the media server to play the ring back tone to the service keeping terminal. purpose.
  • the outreach terminal picks up the phone, the media server stops the ring back tone to the service hold terminal, and the outreach terminal and the service hold terminal need to communicate.
  • the media negotiation with the external terminal and the service holding terminal can be understood as the AS transmitting the media information of the other party between the external terminal and the service holding terminal, completing the media negotiation of the external terminal and the service holding terminal, and maintaining the external terminal and the service.
  • the outbound terminal and the service hold terminal enter a call state to implement a blind transfer function.
  • the media information mentioned may be SDP media information, including an IP address, a port number, a media capability such as audio, video, an encoding format, and the like.
  • the method for implementing the service switching in this embodiment can be implemented on the basis of the existing terminal and the existing network element device, and the service is switched according to the service, and the service trigger message reported by the service switching terminal can be used. Controlling the media server to play the call hold tone to the service keeping terminal, prompting the user not to hang up, and thereafter, after receiving the service switching message according to the key signal conversion processing reported by the service switching terminal in the call, the service switching message can be switched according to the service switching message.
  • the service parameter determines the handover service, and then performs the service switching and the media negotiation with the diagnosis corresponding to the handover service, and controls the media server to perform the corresponding playback on the terminal corresponding to the handover service, and completes the entire handover process, which is not needed in the method of this embodiment.
  • the terminal supports the sending of the two-way communication and the refer message, and does not need to use a specific WEB server. Therefore, the method in this embodiment is applicable to the existing terminal and the existing network element device, which is beneficial to improving the existing terminal and the existing terminal.
  • the utilization of network element devices reduces the cost of service switching. Practical help enhance the user experience a sense of.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • UEs user equipments
  • PSTN terminal PSTN terminal
  • IMS terminal IMS terminal
  • the application server AS provides the underlying service capabilities, such as call control, status reporting, and bill generation.
  • the MRS media server provides voice media capabilities, such as playing a call hold tone to the held party user during call hold.
  • the protocol used in the network element is as follows:
  • the AS negotiates with the MRS or the UE for the media of the call, and the AS and the UE pass the core.
  • the network uses the SIP protocol to communicate with each other.
  • the SIP protocol or the MGCP protocol is usually used between the AS and the MRS, which is determined by the protocol type supported by the MRS.
  • the media stream is transmitted between the UE and the MRS, the codec format of the UE and the MRS media packet, the transceiver port, the bandwidth transmission rate, and the like, and the media negotiation between the terminal UE and the MRS is performed according to the call.
  • This embodiment provides another method for implementing service switching, where the method includes:
  • the core network converts the message reported by the service switching terminal into an INFO message and sends the message to the AS.
  • the message on the terminal side is generally the DTMF signal corresponding to the key signal, so the core network is also required to convert the user's key signal into an INFO message and report it to the AS.
  • the key signal corresponding to the AS matching INFO message is the designated key service feature code such as *77.
  • the core network converts the key signal reported by the service switching terminal from the DTMF signal to the INFO message and sends it to the AS.
  • the core network may collect a specified button service feature code reported by the terminal, such as *77, and send an INFO message containing the specified button service feature code to the AS in the INFO message body; in addition, the core network may also report on the terminal.
  • a button number is converted into an INFO message and sent to the AS.
  • the AS receives a plurality of button numbers corresponding to the button service feature code to complete the matching of the specified button service feature code.
  • S203 The AS keeps the call hold tone for the service holding terminal of the user A, and plays the tone collection number for the service switching terminal of the user B.
  • the sound of the sound collection and reception number may actually be an empty voice, that is, a silent sound or a null sound; or, the AS puts a call to the A to keep the prompt sound, and the received number here refers to the button number that continues to receive the user B.
  • the signal of the user B received by the AS is actually the INFO message including the button number, that is, the service switching message in the first embodiment, and the button number corresponding to the INFO message, which can be understood as the switching service in the first embodiment. parameter.
  • S205 The AS stops the user to maintain the call hold tone for the service of the user A, associates the users A and B, and causes the users A and B to continue to enter the call state; at this time, the process ends.
  • the AS releases the user B, And stop playing the call hold tone for user A.
  • the service code is added before the number to distinguish it from other service functions in another scenario.
  • the specified service code may not be added, that is, the button number only contains the number part, and the default is Enter the number to go through the blind transfer process.
  • the AS calls the user C, the user C rings, and the AS simultaneously plays the ring back tone to the user A.
  • the user C picks up the phone, the AS stops playing the ring back tone to the user A, and the AS associates the user C with the user A to implement the call between the user C and the user A. At this time, the process ends.
  • this embodiment further provides a method for converting a key signal into an INFO signal, including:
  • the user B is a service user on the AS, and may be a calling party or a called party.
  • the CN is a core network (Core Network, referred to as CN) such as an IMS network or an NGN network.
  • Core Network referred to as CN
  • the AS, the MRS, and the UE are connected.
  • the INFO message is as follows. It can be understood that the message is only an example and does not limit the content of the embodiment.
  • the CN sends a response 200 OK to the AS to send an INFO message.
  • the user B presses a button during a call, such as pressing *; wherein the button number can be any combination of numbers and symbols in *, #, 0-9.
  • CN receives the content of the button of user B as *77, and matches the content of the button to press The key signature *77, the CN sends an INFO message to the AS, and the INFO message body contains corresponding content such as *77.
  • the CN does not send an INFO message to the AS, that is, in this embodiment, The CN completes the matching and screening of the button number and the button feature code.
  • the CN may perform the matching and filtering, directly convert the user B's key code into an INFO message, and send it to the AS, and the AS performs matching and screening. At this time, step S301 is no longer needed.
  • the content of the INFO message sent by the CN is as follows in the step S306. It is to be understood that the message is only an example, and is not limited in this embodiment.
  • S307 The AS sends a response 200 OK to the CN to the INFO message. If the button number in the INFO message received by the AS matches the key signature of the button, the subsequent process is performed.
  • this embodiment also provides another method for converting a key signal into an INFO signal.
  • the method in which the UE B is understood as the service switching terminal of the user B, the method includes:
  • the user B is a service user on the AS, and may be a calling party or a called party.
  • the button number of the user B may be any combination of numbers and symbols in *, #, 0-9.
  • the CN sends the button signal to the INFO message and sends the message to the AS.
  • the message body of the INFO message contains the content of the button of the user B, *.
  • the CN is a Core Network (CN), such as an IMS network or an NGN network.
  • CN Core Network
  • the AS, the MRS, and the UE are connected or anchored to the ISM network or the NGN network.
  • the INFO message in the step S402 is as follows. It can be understood that the message is only an example, and the present embodiment is not limited.
  • the AS returns an OK response message of the INFO message to the CN.
  • the CN sends the button signal to the INFO message and sends the message to the AS.
  • the message body of the INFO message contains the content of the button of the user B, 7.
  • step S405 For the content of the INFO message in step S405, refer to the message content example of step S402, and replace the * content therein with 7.
  • the AS returns an OK response of the INFO message to the CN.
  • the CN sends the button signal to the INFO message and sends the message to the AS.
  • the message body of the INFO message contains the content of the button of the user B, 7.
  • step S408 For the content of the INFO message in step S408, refer to the message content example of step S402, and replace the * content therein with 7.
  • S409 The AS returns a response 200 OK of the INFO message to the CN. If the AS matches the button number of the user B according to the INFO message and the button feature code *77, the process proceeds to the subsequent process.
  • the AS recognizes that the button signal input by the user B is other content such as 123#, *78, etc., and does not match the specified button feature code such as *77, then ignores the corresponding INFO message reported, except for the INFO The message is replied to the OK response and no further processing is done.
  • the embodiment further provides a method for implementing a blind transfer service, where UE A, UE B, and UE C are respectively understood as a service holding terminal of user A, a service switching terminal of user B, and a user C. Connected terminal.
  • the method illustrated in Figure 5 includes:
  • the user B can be the calling party or the called party, and the button signal can be understood as the DTFM signal corresponding to the button number of the user.
  • S502 The AS returns a response 200 OK of the INFO message to the service switching terminal of the user B.
  • the AS matches the button number in the INFO message to the specified service feature code. For example, *77, the AS wants to play the call hold tone to the user A, so the AS sends a REINVITE request to the A, and carries the SDP media information of the MRS.
  • the SDP media information includes an IP address, a port number, and a media capability such as audio, video, and encoding format, and the like.
  • S504 The service holding terminal of the user A returns a response 200 OK of the REINVITE request to the AS, and carries the SDP media information of the service holding terminal.
  • S505 The AS sends an ACK acknowledgement message to the service holding terminal of the user A, and puts a call hold tone for the service hold terminal.
  • the AS wants to play the receiving number of the service switching terminal of the user B, and the sound may be a null tone. Then, the AS sends a REINVITE request to the service switching terminal, and carries the SDP media information of the MRS.
  • the service switching terminal of the user B returns a response 200 OK of the REINVITE request to the AS, and carries the SDP media information of the service switching terminal itself.
  • the AS sends an ACK acknowledgement message to the service switching terminal of the user B, and plays a tone to the service switching terminal.
  • the audio content may be a voice.
  • the user B enters the number of the associated terminal of the user C, and the AS releases the user B, and sends a BYE request to the service switching terminal.
  • the button number input by the user B may also be the specified service code plus the number of the associated terminal, that is, the service code plus the number of the user C.
  • S510 The service switching terminal returns a response of the BYE request 200OK, and B ends the call.
  • the AS stops placing a call alert tone for the A, and the AS calls the user C to send an INVITE request to the associated terminal.
  • S513 The AS wants to put back a ring tone to the user A, and then sends a REINVITE request to the service holding terminal, and carries the SDP media information of the MRS.
  • S514 The service holding terminal returns a response 200 OK of the REINVITE request to the AS, and carries the SDP media information of the service holding terminal itself.
  • the AS sends an ACK acknowledgement message to user A, and puts back a ring tone to user A.
  • S516 The user C picks up the phone, and the outreach terminal returns a response 200 OK of the INVITE request to the AS, and carries the SDP media information of the external terminal itself.
  • the AS stops the ringing tone for the user A, and wants to associate the user A with the user C. Then, the AS sends a REINVITE request to the service holding terminal of the user A, and carries the SDP media information of the associated terminal of the user C, that is, the step is SDP media information in 515.
  • the service holding terminal of the user A returns a response 200 OK of the REINVITE request to the AS, and carries the SDP media information of the service holding terminal.
  • the AS sends an ACK acknowledgement message to the service holding terminal.
  • S520 The AS sends an ACK acknowledgement message to the outbound terminal, and carries the SDP media information of the A, that is, the SDP media information in step 517.
  • the external terminal and the service hold terminal complete the media negotiation, enter the call state, and implement the function of blind transfer. .
  • the method for implementing the service switching in this embodiment can implement the services such as the blind transfer on the basis of the existing terminal and the network element device, and the terminal can report the key number input by the user to the AS, and the AS according to the input key number and The corresponding relationship of each service controls the terminal involved in the service, so as to maintain the call or blindly switch during the call, and the terminal having the message of sending the refer signal must be used or the terminal having the two-way calling capability must be used in the related art.
  • the terminal in this embodiment can be implemented by using the existing common terminal, which is beneficial to the function of calling hold and blind transfer on the terminal currently sold or used in the market, and the adaptability of the embodiment. Better and more practical.
  • the embodiment does not need to set up a WEB server, so the cost of deployment can be saved, and the user experience is improved.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the embodiment provides an application server that implements service switching, including: Receiving module 61 and control module 62;
  • the receiving module 61 is configured to receive a service trigger message reported by the service switching terminal in the call, and receive a service switching message reported by the service switching terminal in the call; the service trigger message is generated according to the trigger button signal conversion processing of the service switching terminal. a message; the service switching message is a message generated after the switching of the switching button signal of the service switching terminal;
  • the control module 62 is configured to: when the service trigger message carries the preset button service feature code, negotiate with the media in the call to maintain the call hold service of the service, and control the media server to play the call hold tone to the service hold terminal;
  • the service switching message is parsed to obtain the switching service parameter, and the terminal corresponding to the switching service performs service switching and media negotiation according to the switching service parameter, and controls the media server to perform corresponding playback on the terminal corresponding to the switching service.
  • the service switching terminal and the service holding terminal are user terminals in the current call, and are devices for initiating a call, answering a call, and performing other call operations
  • the user equipment User Equipment, UE
  • Terminal devices such as a network mobile phone, a PSTN terminal, and an IMS terminal are not limited in this embodiment.
  • a service switching terminal can be understood as a terminal that actively initiates a switching service during a call, that is, a terminal that initiates a service switching by a user operating a button during a call.
  • a service holding terminal is understood as a terminal that talks with a service switching terminal during the same call.
  • the service switching terminal may be a calling terminal or a called terminal, which is not limited in this embodiment.
  • the service trigger message and the service switching message received by the receiving module 61 are both INFO messages, and are INFO messages generated by the core network based on the trigger signal of the terminal and the switching button signal respectively.
  • the trigger button signal and the switch button signal are converted into DTMF signals according to the button numbers input by the user.
  • the response is the corresponding key code entered by the user.
  • the control module 62 controls the media server to play the call holding tone to the service holding terminal according to the service triggering message. Prompt the user that he is currently in a call state to prevent the user from hanging up. At this time, the user can input a button signal on the service switching terminal to determine a switching service.
  • the button numbers include, but are not limited to, numbers, and symbols such as *, #, 0-9.
  • different switching service parameters can be specified for different switching services, and the length and composition of the service parameters can be switched, and can be arbitrarily set, for example, *77 is set to be a blind-transfer service corresponding Switching service parameters, when user B triggers a button during the conversation with user A, and inputs a button number *77, a blind turn operation is triggered, and the service switching terminal can automatically generate a switch button signal according to the button number, the switch
  • the button signals include but are not limited to signals such as DTMF (Double Tone Multi Frequency) signals.
  • the handover service in this implementation includes the call maintenance service and the blind transfer service.
  • the corresponding handover service parameters are blind transfer service parameters and call release maintenance service parameters.
  • control module 62 is configured to control the media server to stop playing the call hold tone for the service holding terminal, associate the service switching terminal with the service holding terminal, and control the call state.
  • the process of associating the service switching terminal with the service holding terminal includes:
  • the control module 62 obtains the media information of the service switching terminal, sends a message with the media information of the service switching terminal to the service holding terminal, receives the message with the self media information sent by the service holding terminal, and sends the service holding terminal to the service switching terminal.
  • Media information That is, the control module 62 needs to transfer the media information of the other party between the service switching terminal and the service holding terminal. After the service switching terminal and the service holding terminal learn the media information of the other party, the service switching terminal and the service holding terminal complete the association and enter the call state. , you can start talking.
  • control module 62 is configured to release the service switching terminal, and control the media server to stop playing the call-holding tone for the service-holding terminal;
  • the outbound terminal corresponding to the call blind forwarding service performs media negotiation with the outbound terminal and the service holding terminal, and controls the media server to perform corresponding playback on the external terminal and the service holding terminal;
  • the control module 62 needs to end the call of the service switching terminal, that is, release the service switching terminal, and then establish a call between the service holding terminal and the external terminal.
  • control module After the control module calls the outreach terminal corresponding to the blind transfer service, the outreach terminal rings, and the control module 62 performs media negotiation with the outreach terminal and the service hold terminal, and sends the application to the outreach terminal and the service hold terminal through the request message.
  • the media information of the server receives the media information of the outreach terminal and the service holding terminal.
  • the media information in this embodiment may be SDP media information, including but not limited to an IP address, a port number, a media capability such as audio, video, and an encoding format.
  • the embodiment further provides a system for implementing service switching, including a media server 71 and the application server 6 described above in this embodiment;
  • the application server 6 performs media negotiation with the media server for the handover service, and the media server is configured to send the media stream to the terminal corresponding to the handover service according to the media negotiation performed by the application server and the terminal corresponding to the handover service.
  • the control module can control the media server to maintain the prompt tone for the service holding terminal to prevent the user from hanging up.
  • the control module performs the service switching and the media negotiation according to the service switching message and the terminal corresponding to the switching service, and re-establishes the call between the two terminals after the service switching, so as to implement the service switching during the call.
  • the embodiment is The message containing the button signal is transmitted between the existing terminal and the network element device to implement the triggering of the service, and the service is switched.
  • the advanced terminal must be provided or the WEB server must be used.
  • the network element device is improved, has better adaptability, is conducive to expanding the extensive application, and also saves the cost of deployment, improves the usability and user experience.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • Embodiments of the present disclosure also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the media maintenance negotiation terminal performs a media negotiation of the call hold and play service, and controls the media server to hold the call hold tone for the service hold terminal;
  • S4 Parsing the service switching message to obtain the switching service parameter; performing service switching and media negotiation on the terminal corresponding to the switching service according to the switching service parameter, and controlling the media server to perform corresponding playback on the terminal corresponding to the switching service.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the control media server stops playing the call hold tone for the service hold terminal, associates the service switch terminal with the service hold terminal, and controls the call state to enter the call state.
  • the storage medium is further arranged to store program code for performing the following steps:
  • the outreach terminal corresponding to the call blind transfer service performs media negotiation with the outreach terminal and the service hold terminal, and controls the media server to perform corresponding playback on the external terminal and the service hold terminal;
  • the foregoing storage medium may include, but is not limited to: a USB flash drive, only A medium that can store program code, such as a read-only memory (ROM), a random access memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • removable hard disk a hard disk
  • magnetic disk a magnetic disk
  • optical disk a medium that can store program code
  • the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.
  • modules or steps of the present disclosure can be implemented by a general computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in a storage medium (ROM/RAM, diskette, optical disk) by a computing device, and in some cases The steps shown or described may be performed in an order different than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of the modules or steps may be implemented as a single integrated circuit module. Therefore, the present disclosure is not limited to any specific combination of hardware and software.
  • the service trigger message reported by the service switching terminal may be received, and the control media server may play the call hold tone for the service holding terminal, and then continue to receive the service switching message reported by the service switching terminal to obtain the handover.
  • the service parameter performs service switching and media negotiation with the terminal corresponding to the handover service, implements association between the two terminals, re-establishes a call between the two terminals, and realizes the purpose of corresponding service switching during the call.
  • the existing terminal and the network element device are utilized, which is equivalent to the related art, which requires an advanced terminal, or a solution for setting a WEB server, and the present disclosure does not need to change the existing terminal and the network. Realized, so the present disclosure obviously has better adaptability and practicability, expands the extensive application, saves the cost of deploying the network, and improves the user experience.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)

Abstract

La présente invention concerne un procédé de mise en œuvre de commutation de service, un serveur d'application, un système, et un support de stockage. Selon la présente invention, un message de déclenchement de service rapporté par un terminal de commutation de service peut être reçu, et un serveur multimédia reçoit l'instruction de jouer une tonalité d'invite de maintien d'appel sur un terminal de maintien de service. Ensuite, après qu'un message de commutation de service rapporté par le terminal de commutation de service a été reçu, une commutation de service et une négociation de média peuvent être effectuées avec un terminal correspondant au service cible, d'après un paramètre d'un service cible contenu dans le message de commutation de service. Le service multimédia reçoit l'instruction d'effectuer une lecture vocale correspondante sur le terminal correspondant au service cible. Sur la base du mécanisme, le mode de réalisation peut mettre en œuvre une commutation de service basée sur une clé, sur un terminal commun, pendant un appel. Comparée à une solution de l'état de la technique, qui exige un terminal plus avancé ou l'ajout d'un serveur WEB, la présente invention n'exige pas d'amélioration ou d'ajout d'un terminal ou d'un dispositif réseau/élément, ce qui réduit les coûts du déploiement et facilite l'extension de l'universalité de l'application. En outre, la présente invention permet d'obtenir une meilleure utilité et une meilleure adaptabilité, améliorant ainsi davantage l'expérience de l'utilisateur.
PCT/CN2017/088963 2016-06-22 2017-06-19 Procédé de mise en œuvre de commutation de service, serveur d'application, système, et support de stockage WO2017219939A1 (fr)

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