WO2018121590A1 - Sip终端呼叫转接方法及系统 - Google Patents

Sip终端呼叫转接方法及系统 Download PDF

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Publication number
WO2018121590A1
WO2018121590A1 PCT/CN2017/118935 CN2017118935W WO2018121590A1 WO 2018121590 A1 WO2018121590 A1 WO 2018121590A1 CN 2017118935 W CN2017118935 W CN 2017118935W WO 2018121590 A1 WO2018121590 A1 WO 2018121590A1
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Prior art keywords
terminal
call
initial
party
responder
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PCT/CN2017/118935
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English (en)
French (fr)
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潘锦川
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中兴通讯股份有限公司
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Publication of WO2018121590A1 publication Critical patent/WO2018121590A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • 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
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • 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

Definitions

  • the present disclosure relates to, but is not limited to, the field of user equipment (UE) and the Session Initiation Protocol (SIP), and in particular, to a SIP terminal call forwarding method and system.
  • UE user equipment
  • SIP Session Initiation Protocol
  • call forwarding is also a commonly used Voice over Internet Protocol (VoIP) service.
  • VoIP Voice over Internet Protocol
  • Call forwarding refers to, for example, transferring a call between user equipment A and user equipment B as user equipment C and User equipment B's call, user equipment A exits the call.
  • the traditional transit service mainly refers to the 3rd Generation Partnership Project (3GPP) protocol, and its business process is based on the IP Multimedia Subsystem (IMS) network environment, which is mainly controlled by the SIP server, but The requirements for the SIP server are high, and the networking solution is also complex. It requires multiple network elements to cooperate. Therefore, it is not suitable for scenarios with strict network cost control, such as not suitable for small and medium-sized enterprise networks.
  • 3GPP 3rd Generation Partnership Project
  • IMS IP Multimedia Subsystem
  • the present disclosure provides a Session Initiation Protocol (SIP) terminal call transfer method, comprising the steps of: initiating a transfer to an initial responder terminal during a call between an initial caller terminal and an initial responder terminal Requesting, the initial responder terminal releases a call with the initial calling party terminal according to the transfer request, and as a call substitute terminal, initiates a call to a third party terminal specified in the transfer request; Off-hook, the initial responder terminal makes a call with the third party terminal.
  • SIP Session Initiation Protocol
  • the step of the initial caller terminal initiating a transfer request to the initial responder terminal during a call between the initial caller terminal and the initial responder terminal comprises: at the initial caller terminal and the initial responder terminal During the call, the initial caller terminal initiates a blind transfer transfer request to the initial responder terminal, where the blind transfer transfer request includes a third-party terminal for indicating that the initial responder terminal is to be transferred. number.
  • the step of the initial responder terminal releasing the call with the initial caller terminal according to the transfer request and initiating a call to the third party terminal specified in the transfer request as the call substitute terminal may include: The initial responder terminal generates a release message for releasing a call with the initial caller terminal according to the blind transfer request, and sends the release message to the initial caller terminal, where After the initial caller terminal hangs up according to the release message, the initial responder terminal generates a call message for calling a third party terminal according to the blind transfer transfer request, and sends the call message to the call substitute terminal as a call substitute terminal.
  • the third party terminal is not limited to the initial responder terminal.
  • the step of the third party terminal going off-hook and the initial responder terminal making a call with the third party terminal may include: the third party terminal picks up the phone according to the call message, and the initial responder terminal and the terminal The third party terminal makes a call.
  • the step of the initial caller terminal initiating a transfer request to the initial responder terminal during a call between the initial caller terminal and the initial responder terminal comprises: at the initial caller terminal and the During the initial caller terminal, the initial caller terminal also makes a call with the third party terminal, and then the initial caller terminal initiates an inquiry transfer request to the initial responder terminal, and the query turns to The transfer request includes a number indicating a third party terminal to which the initial responder terminal is to be transferred, and information for the third party terminal to perform call replacement.
  • the step of the initial responder terminal releasing the call with the initial caller terminal according to the transfer request and initiating a call to the third party terminal specified in the transfer request as the call substitute terminal may include: The initial responder terminal generates a release message for releasing a call with the initial caller terminal according to the query transfer request, and sends the release message to the initial caller terminal, the initial After the caller terminal hangs up according to the release message, the initial responder terminal generates, according to the query transfer request, a call message including information indicating that the third party terminal performs call replacement and is used to call the third party terminal, and The call substitute terminal transmits the call message to the third party terminal.
  • the step of the third party terminal going off-hook and the initial responder terminal making a call with the third party terminal may include: the third party terminal going off-hook, generating a call for releasing the initial caller terminal
  • the release message is sent to the initial caller terminal, and after the initial caller terminal hangs up according to the release message, the initial responder terminal makes a call with the third party terminal.
  • the present disclosure also provides a Session Initiation Protocol (SIP) terminal call forwarding system, including an initial caller terminal, an initial responder terminal, and a third party terminal, wherein: the initial caller terminal is configured to be in the initial responder Transmitting a transfer request to the initial responder terminal during a call; the initial responder terminal is configured to release a call with the initial caller terminal according to the transfer request, and serve as a call substitute terminal.
  • SIP Session Initiation Protocol
  • the initial caller terminal is configured to initiate a blind transfer transfer request to the initial responder terminal during a call with the initial responder terminal, the blind transfer transfer request including The number of the third party terminal to be transferred is indicated to the initial responder terminal.
  • the initial responder terminal may be configured to generate a release message for releasing a call with the initial caller terminal according to the blind transfer request, and send the release message to the initial a caller terminal, after the initial caller terminal hangs up according to the release message, the initial responder terminal generates a call message for calling the third party terminal according to the blind transfer transfer request, and replaces it as a call The terminal sends the call message to the third party terminal.
  • the third-party terminal may be configured to go off-hook according to the call message, and the initial responder terminal makes a call with the third-party terminal.
  • the initial caller terminal is configured to talk to the third party terminal during a call with the initial answering party terminal, and then the initial caller terminal to the initial responder
  • the terminal initiates an inquiry transfer request, where the inquiry transfer request includes a number for indicating the third party terminal to be transferred to the initial answering party terminal, and is used to instruct the third party terminal to perform call replacement. Message.
  • the initial responder terminal may be configured to generate a release message for releasing a call with the initial caller terminal according to the query transfer request, and send the release message to the initial a caller terminal, after the initial caller terminal hangs up according to the release message, the initial responder terminal generates, according to the query transfer request, information including the third party terminal for performing call replacement and is used for calling The call message of the third party terminal, and the call message is sent to the third party terminal as a call substitute terminal.
  • the third-party terminal may be configured to generate a release message for releasing a call with the initial caller terminal according to the call message off-hook, and send the release message to the initial caller.
  • the terminal after the initial calling party terminal hangs up according to the release message, the initial responder terminal makes a call with the third party terminal.
  • the present disclosure also provides a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements any of the methods described above.
  • FIG. 1 is a flowchart of a SIP terminal call transfer method according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a SIP terminal call forwarding system according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a SIP terminal call blind transfer provided by an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a SIP terminal call inquiry turn provided by an embodiment of the present disclosure.
  • the SIP terminal call transfer method includes: Step S101, at an initial caller terminal and an initial responder. During the call by the terminal, the initial caller terminal initiates a transfer request to the initial responder terminal; step S102: the initial responder terminal releases the call with the initial caller terminal according to the transfer request, And as a call substitute terminal, initiating a call to the third-party terminal specified in the transfer request; Step S103: The third-party terminal picks up the phone, and the initial responder terminal makes a call with the third-party terminal.
  • step S101 includes: when the initial caller terminal makes a call with the initial responder terminal, the initial caller terminal initiates a blind transfer transfer request to the initial responder terminal, the blind transfer transfer The request contains a number for indicating to the initial responder terminal the third party terminal to be transferred.
  • step S102 includes: the initial responder terminal generates a release message for releasing a call with the initial caller terminal according to the blind transfer transfer request, and sends the release message to the An initial caller terminal, after the initial caller terminal hangs up according to the release message, the initial responder terminal generates a call message for calling a third party terminal according to the blind transfer transfer request, and serves as a call substitute terminal. Sending the call message to the third party terminal.
  • step S103 includes: the third party terminal picks up the phone according to the call message, and the initial responder terminal makes a call with the third party terminal.
  • step S101 includes: during the initial caller terminal making a call with the initial responder terminal, the initial caller terminal further calls with the third party terminal, and then the initial call The party terminal initiates an inquiry transfer request to the initial responder terminal, where the query transfer request includes a number for indicating to the initial responder terminal that the third party terminal to be transferred is used, and is used to indicate the A message that a third party terminal performs a call replacement.
  • step S102 includes: the initial responder terminal generates a release message for releasing a call with the initial caller terminal according to the query transfer request, and sends the release message to the An initial caller terminal, after the initial caller terminal hangs up according to the release message, the initial responder terminal generates, according to the query transfer request, information including a third party terminal for performing call replacement and is used for calling The call message of the three-party terminal, and the call message is sent to the third-party terminal as a call substitute terminal.
  • step S103 includes: the third party terminal goes off-hook, generates a release message for releasing a call with the initial caller terminal, and sends the release message to the initial caller terminal, After the initial caller terminal hangs up according to the release message, the initial responder terminal makes a call with the third party terminal.
  • the SIP terminal call forwarding system includes an initial calling party terminal 201, an initial responder terminal 202, and a third party.
  • Terminal 203 wherein the initial caller terminal 201 is configured to initiate a transfer request to the initial responder terminal 202 during a call with the initial responder terminal 202, the initial responder terminal 202 being configured to The transfer request, releasing the call with the initial caller terminal 201, and acting as a call substitute terminal, initiating a call to the third party terminal 203 specified in the transfer request, after the third party terminal 203 goes off-hook,
  • the initial responder terminal 202 makes a call with the third party terminal 203.
  • the initial caller terminal 201 is configured to initiate a blind transfer transfer request to the initial responder terminal 202 during a call with the initial responder terminal 202, the blind transfer request A number is included for indicating to the initial responder terminal 202 the third party terminal 203 to be transferred.
  • the initial responder terminal 202 is configured to generate a release message for releasing a call with the initial caller terminal 201 according to the blind transfer transfer request, and send the release message to the The initial caller terminal 201, after the initial caller terminal 201 hangs up according to the release message, the initial responder terminal 202 generates a call message for calling the third party terminal 203 according to the blind transfer transfer request. And sending the call message to the third party terminal 203 as a call substitute terminal, the third party terminal 203 off-hook according to the call message, the initial responder terminal 202 making a call with the third party terminal 203 .
  • the initial caller terminal 201 is configured to also make a call with the third party terminal 203 during a call with the initial responder terminal 202, and then the initial caller terminal 201 is The initial responder terminal 202 initiates an inquiry transfer request, where the inquiry transfer request includes a number for indicating to the initial responder terminal 202 that the third party terminal 203 is to be transferred and for indicating the The three-party terminal 203 performs a message of call replacement.
  • the initial responder terminal 202 is configured to generate a release message for releasing a call with the initial caller terminal 201 according to the inquiry transfer request, and send the release message to the The initial caller terminal 201, after the initial caller terminal 201 hangs up according to the release message, the initial responder terminal 202 generates, according to the query transfer request, a command including the third party terminal 203 to perform call replacement.
  • the information is used to call the call message of the third party terminal 203, and the call message is sent to the third party terminal 203 as a call substitute terminal, and the third party terminal 203 is used to generate an off-hook according to the call message.
  • FIG. 3 is a schematic diagram of a SIP terminal call blind transfer provided by an embodiment of the present disclosure.
  • the SIP terminal call blind transfer involves SIP signaling INVITE and REFER.
  • the INVITE message can be used to create a SIP session, modify a session, etc., and if used with a Replaces header, can also be used for call replacement.
  • the REFER message is information used to indicate call forwarding, and is used when the service party initiates call forwarding.
  • the SIP terminal call blind transfer includes, for example, the following steps 1-5.
  • User equipment A makes a call with user equipment B, and user equipment A maintains a call connection with user equipment B.
  • the user equipment A sends a REFER message to the user equipment B, where the uniform resource identifier (URI) in the Refer-To header is the number of the user equipment C, that is, the user equipment A and the user equipment B are required.
  • the call is transferred to the user device C and the user device B.
  • URI uniform resource identifier
  • the user equipment B After receiving the REFER message, the user equipment B knows that the call is to be forwarded, sends a 202 status code to the user equipment A, and sends a BYE message to the user equipment A to let the user equipment A exit the call, thereby releasing the user equipment A and User equipment B's call connection.
  • the user equipment B Since the URI in the Refer-To header of the REFER message is the number of the user equipment C, that is, the call is to be transferred to the user equipment C, the user equipment B sends an INVITE message to the user equipment C to create the user. The call from device B to user device C, user device C rings and replies 180 to respond.
  • User equipment C picks up the phone and replies with a 200 OK message to user equipment B.
  • User equipment B sends an ACK message to user equipment C, so that user equipment B makes a call with user equipment C.
  • FIG. 4 is a schematic diagram of a SIP terminal call inquiry transition according to an embodiment of the present disclosure.
  • the SIP terminal call inquiry involves SIP signaling INVITE and REFER.
  • the INVITE message can be used to create a SIP session, modify a session, etc., and if the INVITE message carries a Replaces header, it can also be used for call replacement.
  • the REFER message is information used to indicate call forwarding, and is used when the service party initiates call forwarding.
  • the SIP terminal call inquiry transition includes, for example, the following steps 1-7.
  • User equipment A and user equipment B talk, and user equipment A maintains a call connection with user equipment B.
  • User equipment A talks to user equipment C, and user equipment A maintains a call connection with user equipment C.
  • the call of B is transferred to user equipment C.
  • the user equipment B After receiving the REFER message, the user equipment B knows that the call is to be forwarded, sends a 202 status code to the user equipment A, and sends a BYE message to the user equipment A to release the call between the user equipment A and the user equipment B.
  • the user equipment C After receiving the INVITE message containing the Replaces parameter, the user equipment C replies with a 200 OK message to the user equipment B, and the user equipment B sends an ACK message to the user equipment C, and the user equipment C sends a BYE message to the user equipment A according to the content of the Replaces parameter.
  • the call between user equipment A and user equipment C is released, thereby performing call replacement.
  • User equipment A replies to the user equipment C with a 200 OK message, so that user equipment B talks to user equipment C.
  • the call of the user equipment A and the user equipment B can be transferred to the communication between the user equipment B and the user equipment C without major control by the SIP server, which reduces the pair.
  • the requirements of the SIP server, and the need to build an IMS network environment, the networking scheme is also relatively simple, and is suitable for a scenario where the network cost control is strict, such as a low-cost small and medium enterprise network environment.
  • the embodiment of the present disclosure is described by taking the user equipment A as a call forwarding service initiator as an example, the present disclosure is not limited thereto, and those skilled in the art may select a call forwarding service initiator according to requirements and an embodiment of the present disclosure. Make the appropriate modifications.
  • Embodiments of the present disclosure may be combined in any combination, and features in the various embodiments of the present disclosure may be partially omitted. Embodiments of the present disclosure may also include additional technical features as desired.
  • the terminal in the present disclosure may be implemented by software, hardware or a combination thereof, which is not specifically limited in the present disclosure.
  • the terminal in the present disclosure may be implemented by a processor executing a computer program, as needed.

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Abstract

本公开提供了一种SIP终端呼叫转接方法及系统，所述SIP终端呼叫转接方法包括：步骤S101，在初始呼叫方终端（201）与初始应答方终端（202）进行通话期间，所述初始呼叫方终端（201）向所述初始应答方终端（202）发起转接请求；步骤S102，所述初始应答方终端（202）根据所述转接请求，释放与所述初始呼叫方终端（201）的通话，并作为呼叫替代终端，向所述转接请求中指定的第三方终端（203）发起呼叫；步骤S103，第三方终端（203）摘机，所述初始应答方终端（202）与所述第三方终端（203）进行通话。

Description

SIP终端呼叫转接方法及系统 技术领域
本公开涉及但不限于用户设备(user equipment，UE)和会话初始协议(Session Initiation Protocol，SIP)技术领域，特别涉及SIP终端呼叫转接方法及系统。
背景技术
除了呼叫等待和三方通话，呼叫转接也是一种常用的网络电话(Voice over Internet Protocol，VoIP)业务，呼叫转接是指比如把用户设备A与用户设备B的通话转接为用户设备C与用户设备B的通话，用户设备A退出通话。
传统的转接业务主要是参考了第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)协议，其业务流程基于IP多媒体系统(IP Multimedia Subsystem，IMS)网络环境，由SIP服务器进行主要控制，但是这对SIP服务器要求较高，组网方案也较为复杂，需要多个网元配合，因此不适合对网络成本控制较严的场景，比如不适合中小型企业网。
发明内容
本公开提供一种会话初始协议(SIP)终端呼叫转接方法，包括步骤：在初始呼叫方终端与初始应答方终端进行通话期间，所述初始呼叫方终端向所述初始应答方终端发起转接请求；所述初始应答方终端根据所述转接请求，释放与所述初始呼叫方终端的通话，并作为呼叫替代终端，向所述转接请求中指定的第三方终端发起呼叫；第三方终端摘机，所述初始应答方终端与所述第三方终端进行通话。
在一些实施例中，在初始呼叫方终端与初始应答方终端进行通话期间所述初始呼叫方终端向所述初始应答方终端发起转接请求的 步骤包括：在初始呼叫方终端与初始应答方终端进行通话期间，所述初始呼叫方终端向所述初始应答方终端发起盲转转接请求，所述盲转转接请求中包含用于指示所述初始应答方终端要转接的第三方终端的号码。
该情况下，所述初始应答方终端根据所述转接请求释放与所述初始呼叫方终端的通话并作为呼叫替代终端向所述转接请求中指定的第三方终端发起呼叫的步骤可以包括：所述初始应答方终端根据所述盲转转接请求，生成用于释放与所述初始呼叫方终端的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端，在所述初始呼叫方终端根据所述释放消息挂机后，所述初始应答方终端根据所述盲转转接请求，生成用于呼叫第三方终端的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端。
该情况下，第三方终端摘机、所述初始应答方终端与所述第三方终端进行通话的步骤可以包括：所述第三方终端根据所述呼叫消息摘机，所述初始应答方终端与所述第三方终端进行通话。
在一些实施例中，在初始呼叫方终端与初始应答方终端进行通话期间所述初始呼叫方终端向所述初始应答方终端发起转接请求的步骤包括：在所述初始呼叫方终端与所述初始应答方终端进行通话期间，所述初始呼叫方终端还与所述第三方终端进行通话，然后，所述初始呼叫方终端向所述初始应答方终端发起询问转转接请求，所述询问转转接请求中包含用于指示所述初始应答方终端要转接的第三方终端的号码以及用于所述第三方终端进行通话替换的信息。
该情况下，所述初始应答方终端根据所述转接请求释放与所述初始呼叫方终端的通话并作为呼叫替代终端向所述转接请求中指定的第三方终端发起呼叫的步骤可以包括：所述初始应答方终端根据所述询问转转接请求，生成用于释放与所述初始呼叫方终端的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端，所述初始呼叫方终端根据所述释放消息挂机后，所述初始应答方终端根据所述询问转转接请求，生成包含指示第三方终端进行通话替换的信息且用于呼叫第三方终端的呼叫消息，并作为呼叫替代终端将所述呼叫消息发 送给所述第三方终端。
该情况下，第三方终端摘机、所述初始应答方终端与所述第三方终端进行通话的步骤可以包括：所述第三方终端摘机，生成用于释放与所述初始呼叫方终端的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端，所述初始呼叫方终端根据所述释放消息挂机后，所述初始应答方终端与所述第三方终端进行通话。
本公开还提供一种会话初始协议(SIP)终端呼叫转接系统，包括初始呼叫方终端、初始应答方终端和第三方终端，其中：所述初始呼叫方终端配置为在与所述初始应答方终端进行通话期间，向所述初始应答方终端发起转接请求；所述初始应答方终端配置为根据所述转接请求释放与所述初始呼叫方终端的通话，并作为呼叫替代终端，向所述转接请求中指定的所述第三方终端发起呼叫，所述第三方终端摘机后，所述初始应答方终端与所述第三方终端进行通话。
在一些实施例中，所述初始呼叫方终端配置为在与所述初始应答方终端进行通话期间，向所述初始应答方终端发起盲转转接请求，所述盲转转接请求中包含用于向所述初始应答方终端指示要转接的第三方终端的号码。
该情况下，所述初始应答方终端可以配置为根据所述盲转转接请求，生成用于释放与所述初始呼叫方终端的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端，所述初始呼叫方终端根据所述释放消息挂机后，所述初始应答方终端根据所述盲转转接请求，生成用于呼叫所述第三方终端的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端。
该情况下，所述第三方终端可以配置为根据所述呼叫消息摘机，所述初始应答方终端与所述第三方终端进行通话。
在一些实施例中，所述初始呼叫方终端配置为在与所述初始应答方终端进行通话期间，还与所述第三方终端进行通话，然后，所述初始呼叫方终端向所述初始应答方终端发起询问转转接请求，所述询问转转接请求中包含用于向所述初始应答方终端指示要转接的所述第三方终端的号码以及用于指示所述第三方终端进行通话替换的消 息。
该情况下，所述初始应答方终端可以配置为根据所述询问转转接请求，生成用于释放与所述初始呼叫方终端的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端，所述初始呼叫方终端根据所述释放消息挂机后，所述初始应答方终端根据所述询问转转接请求，生成包含指示所述第三方终端进行通话替换的信息且用于呼叫所述第三方终端的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端。
该情况下，所述第三方终端可以配置为根据所述呼叫消息摘机，生成用于释放与所述初始呼叫方终端的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端，所述初始呼叫方终端根据所述释放消息挂机后，所述初始应答方终端与所述第三方终端进行通话。
本公开还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现以上所述的任意方法。
附图说明
图1是本公开的实施例提供的一种SIP终端呼叫转接方法的流程图；
图2是本公开的实施例提供的一种SIP终端呼叫转接系统的示意图；
图3是本公开的实施例提供的一种SIP终端呼叫盲转的示意图；
图4是本公开的实施例提供的一种SIP终端呼叫询问转的示意图。
具体实施方式
以下结合附图对本公开的部分实施例进行详细说明，应当理解，以下所说明的实施例仅用于说明和解释本公开的方案，并不用于限定本公开的方案。
图1是本公开的实施例提供的一种SIP终端呼叫转接方法的流程图，如图1所示，所述SIP终端呼叫转接方法包括：步骤S101， 在初始呼叫方终端与初始应答方终端进行通话期间，所述初始呼叫方终端向所述初始应答方终端发起转接请求；步骤S102：所述初始应答方终端根据所述转接请求，释放与所述初始呼叫方终端的通话，并作为呼叫替代终端，向所述转接请求中指定的第三方终端发起呼叫；步骤S103：所述第三方终端摘机，所述初始应答方终端与所述第三方终端进行通话。
在一些实施例中，步骤S101包括：在初始呼叫方终端与初始应答方终端进行通话期间，所述初始呼叫方终端向所述初始应答方终端发起盲转转接请求，所述盲转转接请求中包含用于向所述初始应答方终端指示要转接的第三方终端的号码。该情况下，步骤S102包括：所述初始应答方终端根据所述盲转转接请求，生成用于释放与所述初始呼叫方终端的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端，所述初始呼叫方终端根据所述释放消息挂机后，所述初始应答方终端根据所述盲转转接请求，生成用于呼叫第三方终端的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端。该情况下，步骤S103包括：所述第三方终端根据所述呼叫消息摘机，所述初始应答方终端与所述第三方终端进行通话。
在一些实施例中，步骤S101包括：在所述初始呼叫方终端与所述初始应答方终端进行通话期间，所述初始呼叫方终端还与所述第三方终端进行通话，然后，所述初始呼叫方终端向所述初始应答方终端发起询问转转接请求，所述询问转转接请求中包含用于向所述初始应答方终端指示要转接的第三方终端的号码以及用于指示所述第三方终端进行通话替换的消息。该情况下，步骤S102包括：所述初始应答方终端根据所述询问转转接请求，生成用于释放与所述初始呼叫方终端的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端，所述初始呼叫方终端根据所述释放消息挂机后，所述初始应答方终端根据所述询问转转接请求，生成包含指示第三方终端进行通话替换的信息且用于呼叫第三方终端的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端。该情况下，步骤S103包括：所述第三方终端摘机，生成用于释放与所述初始呼叫方终端的通话的 释放消息，并将所述释放消息发送给所述初始呼叫方终端，所述初始呼叫方终端根据所述释放消息挂机后，所述初始应答方终端与所述第三方终端进行通话。
图2是本公开的实施例提供的一种SIP终端呼叫转接系统的示意图，如图2所示，所述SIP终端呼叫转接系统包括初始呼叫方终端201、初始应答方终端202和第三方终端203，其中，所述初始呼叫方终端201配置为在与所述初始应答方终端202进行通话期间，向所述初始应答方终端202发起转接请求，所述初始应答方终端202配置为根据所述转接请求，释放与所述初始呼叫方终端201的通话，并作为呼叫替代终端，向所述转接请求中指定的第三方终端203发起呼叫，所述第三方终端203摘机后，所述初始应答方终端202与所述第三方终端203进行通话。
在一些实施例中，所述初始呼叫方终端201配置为在与所述初始应答方终端202进行通话期间，向所述初始应答方终端202发起盲转转接请求，所述盲转转接请求中包含用于向所述初始应答方终端202指示要转接的第三方终端203的号码。该情况下，所述初始应答方终端202配置为根据所述盲转转接请求，生成用于释放与所述初始呼叫方终端201的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端201，所述初始呼叫方终端201根据所述释放消息挂机后，所述初始应答方终端202根据所述盲转转接请求，生成用于呼叫所述第三方终端203的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端203，所述第三方终端203根据所述呼叫消息摘机，所述初始应答方终端202与所述第三方终端203进行通话。
在一些实施例中，所述初始呼叫方终端201配置为在与所述初始应答方终端202进行通话期间，还与所述第三方终端203进行通话，然后，所述初始呼叫方终端201向所述初始应答方终端202发起询问转转接请求，所述询问转转接请求中包含用于向所述初始应答方终端202指示要转接的第三方终端203的号码以及用于指示所述第三方终端203进行通话替换的消息。该情况下，所述初始应答方终端202配置为根据所述询问转转接请求，生成用于释放与所述初始呼叫方终 端201的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端201，所述初始呼叫方终端201根据所述释放消息挂机后，所述初始应答方终端202根据所述询问转转接请求，生成包含指示所述第三方终端203进行通话替换的信息且用于呼叫所述第三方终端203的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端203，所述第三方终端203根据所述呼叫消息摘机，生成用于释放与所述初始呼叫方终端201的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端201，所述初始呼叫方终端201根据所述释放消息挂机后，所述初始应答方终端202与所述第三方终端203进行通话。
图3是本公开的实施例提供的一种SIP终端呼叫盲转的示意图，如图3所示，所述SIP终端呼叫盲转涉及SIP信令INVITE和REFER。所述INVITE消息可以用来创建SIP会话、修改会话等，如果携带了Replaces头部，还可以用于通话替换。所述REFER消息是用来指示呼叫转接的信息，由业务方发起呼叫转接时使用。
如图3所示，所述SIP终端呼叫盲转例如包括以下步骤1-5。
1.用户设备A与用户设备B进行通话，用户设备A保持与用户设备B的通话连接。
2.用户设备A向用户设备B发送REFER消息，其中Refer-To头部中的统一资源标识符(uniform resource identifier，URI)为用户设备C的号码，即，要求将用户设备A与用户设备B的通话转接为用户设备C与用户设备B的通话。
3.用户设备B收到REFER消息后，得知要进行呼叫转接，向用户设备A发送202状态码，并向用户设备A发出BYE消息以让用户设备A退出通话，从而释放用户设备A与用户设备B的通话连接。
4.因为REFER消息的Refer-To头部中的URI为用户设备C的号码，也就是说要将呼叫要转接到用户设备C，于是用户设备B向用户设备C发出INVITE消息，以创建用户设备B到用户设备C的呼叫，用户设备C振铃并回复180进行响应。
5.用户设备C摘机并向用户设备B回复200 OK消息，用户设备 B向用户设备C发送ACK消息，从而用户设备B与用户设备C进行通话。
图4是本公开的实施例提供的一种SIP终端呼叫询问转的示意图，如图4所示，所述SIP终端呼叫询问转涉及SIP信令INVITE和REFER。所述INVITE消息可以用来创建SIP会话、修改会话等，如果所述INVITE消息携带了Replaces头部，还可以用于通话替换。所述REFER消息是用来指示呼叫转接的信息，由业务方发起呼叫转接时使用。
如图4所示，所述SIP终端呼叫询问转例如包括以下步骤1-7。
1.用户设备A与用户设备B通话，用户设备A保持与用户设备B的通话连接。
2.用户设备A与用户设备C通话，用户设备A保持与用户设备C的通话连接。
3.用户设备A向用户设备B发出REFER消息，其中Refer-To头部中的URI为用户设备C的号码，REFER消息还包含Replaces参数(Replaces＝AC)，要求将用户设备A的与用户设备B的通话转接到用户设备C。
4.用户设备B收到REFER消息后，得知要进行呼叫转接，向用户设备A发送202状态码，并向用户设备A发出BYE消息以释放用户设备A与用户设备B的通话。
5.用户设备A向用户设备B回复200 OK消息，然后，用户设备B根据REFER消息中的内容向用户设备C发出INVITE消息(包含Replaces参数，Replaces＝AC)。
6.用户设备C收到包含Replaces参数的INVITE消息后，向用户设备B回复200 OK消息，用户设备B向用户设备C发送ACK消息，用户设备C根据Replaces参数内容向用户设备A发送BYE消息以释放用户设备A与用户设备C的通话，从而进行通话替换。
7.用户设备A向用户设备C回复200 OK消息，从而用户设备B与用户设备C通话。
根据本公开的实施例提供的方案，可以实现例如将用户设备A 与用户设备B的通话转接为用户设备B与用户设备C的通话，而不需要由SIP服务器进行主要控制，这降低了对SIP服务器的要求，而且，不需要构建IMS网络环境，组网方案也较为简单，适合对网络成本控制较严的场景，比如适合低成本中小型企业网环境。
虽然以用户设备A作为呼叫转接业务发起方为例描述了本公开的实施例，但是，本公开不限于此，本领域技术人员可以根据需要选择呼叫转接业务发起方并对本公开的实施例进行相应的修改。本公开的各实施例可以进行任意组合，且本公开的各实施例中的特征可部分省略。根据需要，本公开的各实施例还可以包括额外的技术特征。
本公开中的终端可以通过软件、硬件或其结合实现，本公开对此不进行具体限定，例如，根据需要，本公开中的终端可以通过执行计算机程序的处理器实现。
尽管上文对本公开进行了详细说明，但是本公开不限于此，本领域技术人员可以根据本公开的原理对本公开的方案进行各种修改和变型，凡按照本公开的原理所作的修改和变型都应当理解为落入本公开的保护范围。

Claims (15)

  1. 一种会话初始协议(SIP)终端呼叫转接方法，包括步骤：
    S101，在初始呼叫方终端(201)与初始应答方终端(202)进行通话期间，所述初始呼叫方终端(201)向所述初始应答方终端(202)发起转接请求；
    S102，所述初始应答方终端(202)根据所述转接请求，释放与所述初始呼叫方终端(201)的通话，并作为呼叫替代终端，向所述转接请求中指定的第三方终端(203)发起呼叫；
    S103，第三方终端(203)摘机，所述初始应答方终端(202)与所述第三方终端(203)进行通话。
  2. 根据权利要求1所述的方法，其中，步骤S101包括：
    在初始呼叫方终端(201)与初始应答方终端(202)进行通话期间，所述初始呼叫方终端(201)向所述初始应答方终端(202)发起盲转转接请求，所述盲转转接请求中包含用于指示所述初始应答方终端(202)要转接的第三方终端(203)的号码。
  3. 根据权利要求1所述的方法，其中，步骤S101包括：
    在所述初始呼叫方终端(201)与所述初始应答方终端(202)进行通话期间，所述初始呼叫方终端(202)还与所述第三方终端(203)进行通话，然后，所述初始呼叫方终端(201)向所述初始应答方终端(202)发起询问转转接请求，所述询问转转接请求中包含用于指示所述初始应答方终端(202)要转接的第三方终端(203)的号码以及用于所述第三方终端(203)进行通话替换的信息。
  4. 根据权利要求2所述的方法，其中，步骤S102包括：
    所述初始应答方终端(202)根据所述盲转转接请求，生成用于释放与所述初始呼叫方终端(201)的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端(201)，在所述初始呼叫方终端 (201)根据所述释放消息挂机后，所述初始应答方终端(202)根据所述盲转转接请求，生成用于呼叫第三方终端(203)的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端(203)。
  5. 根据权利要求3所述的方法，其中，步骤S102包括：
    所述初始应答方终端(202)根据所述询问转转接请求，生成用于释放与所述初始呼叫方终端(201)的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端(201)，所述初始呼叫方终端(201)根据所述释放消息挂机后，所述初始应答方终端(202)根据所述询问转转接请求，生成包含指示第三方终端(203)进行通话替换的信息且用于呼叫第三方终端(203)的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端(203)。
  6. 根据权利要求4所述的方法，其中，步骤103包括：
    所述第三方终端(203)根据所述呼叫消息摘机，所述初始应答方终端(202)与所述第三方终端(203)进行通话。
  7. 根据权利要求5所述的方法，其中，步骤103包括：
    所述第三方终端(203)摘机，生成用于释放与所述初始呼叫方终端(201)的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端(201)，所述初始呼叫方终端(201)根据所述释放消息挂机后，所述初始应答方终端(202)与所述第三方终端(203)进行通话。
  8. 一种会话初始协议(SIP)终端呼叫转接系统，包括初始呼叫方终端(201)、初始应答方终端(202)和第三方终端(203)，其中：
    所述初始呼叫方终端(201)配置为在与所述初始应答方终端(202)进行通话期间，向所述初始应答方终端(202)发起转接请求；
    所述初始应答方终端(202)配置为根据所述转接请求释放与所 述初始呼叫方终端(201)的通话，并作为呼叫替代终端，向所述转接请求中指定的所述第三方终端(203)发起呼叫，所述第三方终端(203)摘机后，所述初始应答方终端(202)与所述第三方终端(203)进行通话。
  9. 根据权利要求8所述的系统，其中，所述初始呼叫方终端(201)配置为在与所述初始应答方终端(202)进行通话期间，向所述初始应答方终端(202)发起盲转转接请求，所述盲转转接请求中包含用于向所述初始应答方终端(202)指示要转接的第三方终端(203)的号码。
  10. 根据权利要求9所述的系统，其中，所述初始应答方终端(202)配置为根据所述盲转转接请求，生成用于释放与所述初始呼叫方终端(201)的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端(201)，所述初始呼叫方终端(201)根据所述释放消息挂机后，所述初始应答方终端(202)根据所述盲转转接请求，生成用于呼叫所述第三方终端(203)的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端(203)。
  11. 根据权利要求10所述的系统，其中，所述第三方终端(203)根据所述呼叫消息摘机，所述初始应答方终端(202)与所述第三方终端(203)进行通话。
  12. 根据权利要求8所述的系统，其中，所述初始呼叫方终端(201)配置为在与所述初始应答方终端(202)进行通话期间，还与所述第三方终端(203)进行通话，然后，所述初始呼叫方终端(201)向所述初始应答方终端(202)发起询问转转接请求，所述询问转转接请求中包含用于向所述初始应答方终端(202)指示要转接的所述第三方终端(203)的号码以及用于指示所述第三方终端(203)进行通话替换的消息。
  13. 根据权利要求12所述的系统，其中，所述初始应答方终端(202)配置为根据所述询问转转接请求，生成用于释放与所述初始呼叫方终端(201)的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端(201)，所述初始呼叫方终端(201)根据所述释放消息挂机后，所述初始应答方终端(202)根据所述询问转转接请求，生成包含指示所述第三方终端(203)进行通话替换的信息且用于呼叫所述第三方终端(203)的呼叫消息，并作为呼叫替代终端将所述呼叫消息发送给所述第三方终端(203)。
  14. 根据权利要求13所述的系统，其中，所述第三方终端(203)根据所述呼叫消息摘机，生成用于释放与所述初始呼叫方终端(201)的通话的释放消息，并将所述释放消息发送给所述初始呼叫方终端(201)，所述初始呼叫方终端(201)根据所述释放消息挂机后，所述初始应答方终端(202)与所述第三方终端(203)进行通话。
  15. 一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现根据权利要求1至7中任一项所述的方法。
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