WO2017132791A1 - 语音呼叫处理方法及终端设备 - Google Patents

语音呼叫处理方法及终端设备 Download PDF

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Publication number
WO2017132791A1
WO2017132791A1 PCT/CN2016/073047 CN2016073047W WO2017132791A1 WO 2017132791 A1 WO2017132791 A1 WO 2017132791A1 CN 2016073047 W CN2016073047 W CN 2016073047W WO 2017132791 A1 WO2017132791 A1 WO 2017132791A1
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WIPO (PCT)
Prior art keywords
network
lte
terminal
voice
voice call
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PCT/CN2016/073047
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English (en)
French (fr)
Inventor
孙兵
李洪
舒林
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201680077526.7A priority Critical patent/CN108476468B/zh
Priority to PCT/CN2016/073047 priority patent/WO2017132791A1/zh
Priority to EP16888617.4A priority patent/EP3399801B1/en
Publication of WO2017132791A1 publication Critical patent/WO2017132791A1/zh
Priority to US16/051,997 priority patent/US10827393B2/en
Priority to US17/086,878 priority patent/US11363502B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/1225—Details of core network interconnection arrangements
    • H04M7/1235—Details of core network interconnection arrangements where one of the core networks is a wireless network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/165—Performing reselection for specific purposes for reducing network power consumption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer

Definitions

  • the present invention relates to communication technologies, and in particular, to a voice call processing method and a terminal device.
  • LTE Voice LTE Voice
  • IP Internet Protocol
  • EPC Evolved Packet Core
  • IMS IP Multimedia Subsystem
  • the LTE network when the terminal is in the LTE network restricted state, the LTE network receives the voice call request of other users, and sends the request to the terminal, because the terminal is in the LTE network restricted state, VoLTE only The emergency service is provided. Therefore, the terminal in the VoLTE state will ignore the voice call request, so that other users cannot successfully call the terminal, thereby reducing the voice call rate of the smart phone and the user experience is poor.
  • the present invention provides a voice call processing method and a terminal device, which are used to solve the technical problem that the voice call rate of the voice call is low by using the VoLTE method when the terminal is in the LTE network restricted state in the prior art.
  • the present invention provides a voice call processing method: when a terminal meets at least one of two preset conditions, the terminal switches from a currently accessed Long Term Evolution (LTE) network to a non-LTE system;
  • LTE Long Term Evolution
  • the conditions include:
  • Condition 1 Receive the language sent by the LTE network when in the LTE network restricted state a voice paging request, the voice paging request is used to call the terminal to perform a voice call, and the LTE network restriction state can only support emergency call service, and
  • Condition 2 sending an extended service request to the LTE network and receiving a reject message corresponding to the extended service request, the extended service request for requesting the LTE network to redirect or switch the terminal to outside the LTE network
  • Other communication system networks ;
  • a circuit domain CS voice call flow is performed on the non-LTE system network.
  • the terminal when the terminal meets at least one of the two preset conditions, the terminal switches from the currently accessed Long Term Evolution (LTE) network to the non-LTE system network, and performs the operation on the non-LTE system network.
  • LTE Long Term Evolution
  • the circuit domain CS voice call process is implemented to implement a voice call. Therefore, the voice call processing method provided by the embodiment of the present invention improves the voice call rate of the terminal and satisfies the requirements of the user experience.
  • the switching from the currently accessed LTE network to the non-LTE system includes:
  • the terminal actively selects to switch to the currently accessible non-LTE system network;
  • the method further includes the terminal replying to the voice paging response to the non-LTE system network.
  • the terminal actively selects to switch to the currently accessible non-LTE system network in response to the voice paging request, and returns a voice paging response to the non-LTE system network, so that The terminal can quickly access a non-LTE system network.
  • the terminal switching from the currently accessed LTE network to the non-LTE system network includes:
  • the method further includes the terminal replying to the voice paging response to the non-LTE system network.
  • the terminal sends an extended service request to the LTE network in response to the voice paging request, and redirects or switches the terminal from the LTE network to the accessible one under the instruction of the LTE network.
  • the non-LTE system network replies to the voice paging response to the non-LTE system network, so that the terminal can accurately access the available non-LTE system network.
  • the terminal in the restricted state is in the restricted serving cell of the LTE network and only the emergency call bearer is established with the LTE network.
  • the terminal in the LTE network restricted state is in the restricted serving cell of the LTE network and only the emergency call bearer is established with the LTE network to ensure the LTE network.
  • the quality of the call for the emergency call is the reason for the emergency call.
  • the performing the CS voice call process on the non-LTE system network includes:
  • the CS voice call reply procedure is performed in response to the voice paging request on the non-LTE system network to implement the voice call of the terminal.
  • the reject message when the condition 2 is met, includes a reject reason indication value indicating that the CS domain is unavailable.
  • the reject message when the condition 2 is met, includes a reject reason indication value indicating that the CS domain is unavailable, so that the terminal may perform corresponding processing according to the reject cause value in the reject message. .
  • the performing the CS voice call procedure on the non-LTE system network includes: actively initiating CS on the non-LTE system network. Voice call flow.
  • the CS voice call procedure is actively initiated on the non-LTE system network to implement the voice call of the terminal.
  • the non-LTE system network includes: a 2G network or a 3G network.
  • the present invention provides a terminal device, including:
  • the determining module is configured to: when the at least one of the two preset conditions is met, switch from the currently accessed Long Term Evolution (LTE) network to the non-LTE system; the two preset conditions include:
  • Condition 1 receiving a voice paging request sent by the LTE network when in an LTE network restriction state, where the voice paging request is used to call the terminal device to perform a voice call, and the LTE network restriction state can only support Emergency call service, and
  • Condition 2 Send an extended service request to the LTE network and receive the extended service request And obtaining a corresponding reject message, where the extended service request is used to request the LTE network to redirect or switch the terminal device to another communication system network other than the LTE network;
  • a voice call module configured to perform a circuit domain CS voice call procedure on the non-LTE system network.
  • the determining module is specifically configured to:
  • condition 1 in response to the voice paging request, actively selecting to switch to the currently accessible non-LTE system network;
  • the determining module is specifically configured to:
  • the extended service request is sent to the LTE network in response to the voice paging request, and is redirected or switched from the LTE network to accessible under the instruction of the LTE network.
  • the non-LTE system network
  • the terminal device in the LTE network restricted state is in the restricted serving cell of the LTE network and is only established with the LTE network. Emergency call hosting.
  • the voice call module is specifically configured to:
  • condition 1 When condition 1 is satisfied, a CS voice call reply procedure is performed in response to the voice page request on the non-LTE system network.
  • the reject message when the condition 2 is met, includes a reject reason indication value indicating that the CS domain is unavailable.
  • the voice call module is specifically configured to:
  • the CS voice call procedure is actively initiated on the non-LTE system network.
  • the non-LTE system network includes: a 2G network or a 3G network.
  • beneficial effects brought by the foregoing second aspect and the possible implementation manners of the second aspect may be compared with the beneficial effects brought about by the foregoing first aspect and the possible implementation manners of the first aspect, and details are not described herein again. .
  • the present invention provides a terminal device, including:
  • a memory for storing processor executable instructions
  • the processor and the memory are coupled to each other by a system bus; the processor is configured to read the instruction from the memory;
  • the processor is a communication baseband processor.
  • processor is configured to perform the following operations when the instruction is executed:
  • the two preset conditions include:
  • Condition 1 receiving a voice paging request sent by the LTE network when in an LTE network restriction state, the voice paging request is used to call the terminal to perform a voice call, and the LTE network restriction state can only support an emergency Call business, and
  • Condition 2 sending an extended service request to the LTE network and receiving a reject message corresponding to the extended service request, the extended service request for requesting the LTE network to redirect or switch the terminal to outside the LTE network
  • Other communication system networks ;
  • a circuit domain CS voice call flow is performed on the non-LTE system network.
  • beneficial effects brought about by the embodiments of the third aspect may be compared with the beneficial effects brought about by the embodiments of the first aspect, and are not described herein again.
  • FIG. 1 is a schematic structural diagram of an LTE system according to an embodiment of the present disclosure
  • Embodiment 1 is a flowchart of Embodiment 1 of a method for processing a voice call according to an embodiment of the present invention
  • FIG. 3 is a signaling diagram of Embodiment 2 of a method for processing a voice call according to an embodiment of the present disclosure
  • Embodiment 4 is a signaling diagram of Embodiment 3 of a method for processing a voice call according to an embodiment of the present invention
  • FIG. 5 is a signaling diagram of Embodiment 4 of a method for processing a voice call according to an embodiment of the present invention
  • FIG. 6 is a signaling diagram of Embodiment 5 of a method for processing a voice call according to an embodiment of the present disclosure
  • FIG. 7 is a signaling diagram of Embodiment 6 of a method for processing a voice call according to an embodiment of the present invention.
  • FIG. 8 is a signaling diagram of Embodiment 7 of a method for processing a voice call according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of Embodiment 1 of a terminal device according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of Embodiment 2 of a terminal device according to an embodiment of the present disclosure.
  • FIG. 1 is a schematic structural diagram of an LTE system according to an embodiment of the present invention.
  • an LTE system is used as an example, and the LTE system includes a user equipment, an evolved base station (Evolved Node B, eNodeB for short), and an evolved packet core network. (Evolved Packet Core, EPC for short).
  • Evolved Packet Core EPC for short.
  • the EPC is responsible for the core network part
  • the signaling processing part is the Mobility Management Entity (MME)
  • the data processing part is the Serving Gateway (S-GW)
  • the eNode B is responsible for the access network part. It is called the evolved UMTS Terrestrial Radio Access Network (Evolved UTRAN, Evolved UTRAN).
  • the LTE system supports interoperability with other 3GPP systems. According to the duplex mode, the LTE system is divided into a Frequency Division Duplexing (LTE) system (Frequency Division Duplexing-LTE) and a Time Division Duplexing (LTE) system. Referred to as TDD-LTE).
  • LTE Frequency Division Duplexing
  • LTE Time Division Duplexing
  • the terminal involved in the embodiment of the present invention may be a smart phone or a wearable device.
  • the Mobile Switching Center (MSC) involved in the embodiments of the present invention is a place for providing call transition service and call control between a telephone and a data system.
  • the voice call processing method and the terminal device provided by the embodiments of the present invention are used to solve the technical problem that the voice call rate of the voice call is low by using the VoLTE method when the terminal is in the LTE network restricted state in the prior art.
  • FIG. 2 is a flowchart of Embodiment 1 of a method for processing a voice call according to an embodiment of the present invention, such as As shown in Figure 2, the method includes:
  • Step 101 The terminal switches from the currently accessed Long Term Evolution (LTE) network to the non-LTE standard network when at least one of the two preset conditions is met.
  • LTE Long Term Evolution
  • the non-LTE system network may be a second generation mobile phone communication technology specification (2-Generation wireless telephone technology, 2G for short) network, or a third generation mobile phone communication technology specification (3-Generation wireless telephone technology, Referred to as 3G) network, but not limited to this.
  • 2G second generation mobile phone communication technology specification
  • 3G third generation mobile phone communication technology specification
  • two preset conditions include:
  • Condition 1 receiving a voice paging request sent by the LTE network when in the LTE network restricted state, the voice paging request is used for the calling terminal to perform a voice call, and the LTE network restriction state can only support the emergency call service, and
  • Condition 2 Sending an extended service request to the LTE network and receiving a reject message corresponding to the extended service request, the extended service request is used to request the LTE network to redirect or switch the terminal to another communication standard network other than the LTE network.
  • the LTE network currently camped by the terminal A receives the voice paging request from the terminal B to the terminal A, At this time, terminal A satisfies condition 1.
  • terminal A needs to call terminal B, terminal A sends an extended service request to the currently camped LTE network and receives a reject message corresponding to the extended service request. At this time, terminal A satisfies condition 2.
  • Step 102 Perform a Circuit Switched (CS) voice call process on a non-LTE network.
  • CS Circuit Switched
  • a circuit call Circuit Switched, CS for short
  • CS Circuit Switched, CS for short
  • the terminal when the terminal meets at least one of the two preset conditions, switches from the currently accessed Long Term Evolution (LTE) network to the non-LTE system network, and performs circuit domain CS voice on the non-LTE system network.
  • LTE Long Term Evolution
  • a call flow where condition 1: receiving a voice paging request sent by the LTE network when the LTE network is restricted, the voice paging request is used for the calling terminal to perform a voice call, and the LTE network restriction state can only support the emergency call service.
  • condition 2 sending an extended service request to the LTE network and receiving a reject message corresponding to the extended service request, where the extended service request is used to request the LTE network to redirect or switch the terminal to another communication system network other than the LTE network.
  • the terminal when the terminal satisfies at least one of the two preset conditions, the terminal can also perform a normal voice call, avoiding the prior art that when the terminal meets any of the preset conditions, the terminal cannot make a voice call.
  • the problem is to improve the voice call rate of the terminal and meet the requirements of the user experience.
  • FIG. 3 is a signaling diagram of Embodiment 2 of a method for processing a voice call according to an embodiment of the present invention. As shown in FIG. 3, the method includes:
  • Step 201 The terminal is in an LTE network restricted state.
  • the terminal receives the voice paging request sent by the LTE network when the terminal is in the LTE network restricted state, and the voice paging request is used to perform the voice call by the calling terminal, and the LTE network restriction state can only support the emergency call service. .
  • the terminal in the LTE network restricted state is in the restricted serving cell of the LTE network and only the emergency call bearer is established with the LTE network.
  • Step 202 The LTE network sends a voice paging request to the terminal.
  • Step 203 The terminal actively selects to switch to a currently accessible non-LTE system network in response to the voice paging request.
  • Step 204 The terminal replies to the voice paging response to the non-LTE system network.
  • Step 205 Perform a circuit domain CS voice call procedure on a non-LTE system network.
  • the CS voice call reply procedure is performed in response to the voice page request on the non-LTE system network.
  • the terminal actively selects to switch to the currently accessible non-LTE system network in response to the voice paging request, and replies to the voice paging response to the non-LTE system network, so that the terminal can quickly access the non-LTE network.
  • LTE system network LTE system network.
  • FIG. 4 is a signaling diagram of Embodiment 3 of a method for processing a voice call according to an embodiment of the present invention. As shown in FIG. 4, the method includes:
  • Step 301 The terminal is in an LTE network restricted state.
  • Step 302 The LTE network sends a voice paging request to the terminal.
  • Step 303 The terminal sends an extended service request to the LTE network in response to the voice paging request.
  • Step 304 The LTE network returns an instruction to the terminal according to the extended service request.
  • Step 305 The terminal redirects or switches the LTE network to the accessible non-LTE standard network according to the instruction.
  • Step 306 The terminal replies to the voice paging response to the non-LTE system network.
  • Step 307 Perform a circuit domain CS voice call procedure on a non-LTE system network.
  • the CS voice call reply procedure is performed in response to the voice page request on the non-LTE system network.
  • the terminal sends an extended service request to the LTE network in response to the voice paging request, and redirects or switches the terminal from the LTE network to the accessible non-LTE system network under the instruction of the LTE network, and The voice page response is replied to the non-LTE system network, so that the terminal can accurately access the available non-LTE system network.
  • FIG. 5 is a signaling diagram of Embodiment 4 of a method for processing a voice call according to an embodiment of the present invention. As shown in FIG. 5, the method includes:
  • Step 401 The terminal sends an extended service request to the LTE network.
  • the extended service request is used to request the LTE network to redirect or switch the terminal to other communication system networks other than the LTE network.
  • Step 402 The LTE network sends a reject message corresponding to the extended service request to the terminal.
  • the reject message includes a reject reason indication value indicating that the CS domain is unavailable, and specifically, the cause indication value is 18.
  • Step 403 The terminal switches from the currently accessed Long Term Evolution (LTE) network to the non-LTE standard network.
  • LTE Long Term Evolution
  • Step 404 Proactively initiate a CS voice call process on a non-LTE network.
  • the CS voice call reply procedure is performed in response to the voice page request on the non-LTE system network.
  • the terminal sends an extended service request to the LTE network, and receives the reject message corresponding to the extended service request sent by the LTE network, and the terminal switches from the currently accessed long-term evolution LTE network to the non-LTE standard network.
  • the CS voice call process is initiated on the non-LTE network, so that the voice call of the terminal can be realized, thereby improving the voice call rate of the terminal and meeting the requirements of the user experience.
  • FIG. 6 is a signaling diagram of Embodiment 5 of a method for processing a voice call according to an embodiment of the present invention. As shown in FIG. 6, the method includes:
  • Step 501 The terminal enters a restricted service state.
  • the terminal may enter the restricted service state by first sending a registration request message to the MME and the MSC, and dialing the VoLTE emergency to the MME.
  • the MME sends a request to release the normal bearer to the terminal.
  • the terminal releases the normal bearer, and sends an hang up VoLTE emergency call request to the LTE network, and the LTE network releases the link after receiving the VoLTE emergency call request.
  • the terminal enters the restricted service state.
  • Step 502 The MSC receives a voice page request.
  • the MSC receives the voice paging request from the terminal B to the terminal A.
  • Step 503 The MSC sends a paging request (PAGING REQ) to the MME.
  • PAGING REQ a paging request
  • the PAGING REQ includes a calling number, location area information, and the like.
  • Step 504 The MME sends a paging request (CS PAGING) of the circuit domain to the terminal.
  • CS PAGING paging request
  • Step 505 The terminal actively selects to switch to the currently accessible non-LTE standard network according to CS PAGING.
  • Step 506 The terminal sends a paging response (PAGING RSP) to the MSC.
  • PAGING RSP paging response
  • the terminal sends a paging response (PAGING RSP) to the MSC using a non-LTE system network.
  • PAGING RSP paging response
  • Step 507 Perform a CS voice call procedure on a non-LTE system network.
  • the terminal actively selects to switch to the currently accessible non-LTE system network according to the voice paging request, so that the terminal can quickly access the non-LTE system network.
  • FIG. 7 is a signaling diagram of Embodiment 6 of a method for processing a voice call according to an embodiment of the present invention. As shown in FIG. 7, the method includes:
  • Step 601 The terminal enters a restricted service state.
  • Step 602 The MSC receives a voice page request.
  • Step 603 The MSC sends a paging request (PAGING REQ) to the MME.
  • PAGING REQ a paging request
  • Step 604 The MME sends a paging request (CS PAGING) of the circuit domain to the terminal.
  • Step 605 The terminal sends an extended service request to the MME according to CS PAGING.
  • Step 606 The LTE network returns an instruction to the terminal according to the extended service request.
  • Step 607 The terminal redirects or switches the LTE network to the accessible non-LTE standard network according to the instruction.
  • the LTE network receives the extended service request sent by the terminal, and returns a redirect instruction to the terminal side, and the terminal performs a redirection standard process according to the redirect instruction to redirect the LTE network of the current access network to Non-LTE network that can be accessed, but not limited to this.
  • Step 608 The terminal sends a paging response (PAGING RSP) to the MSC.
  • PAGING RSP paging response
  • Step 609 Perform a circuit domain CS voice call procedure on a non-LTE system network.
  • the terminal sends an extended service request to the LTE network in response to the voice paging request, and redirects or switches the terminal from the LTE network to the accessible non-LTE system network under the instruction of the LTE network, and The voice page response is replied to the non-LTE system network, so that the terminal can accurately access the available non-LTE system network.
  • FIG. 8 is a signaling diagram of Embodiment 7 of a method for processing a voice call according to an embodiment of the present invention. As shown in FIG. 8, the method includes:
  • Step 701 The terminal sends an extended service request to the MME.
  • the extended service request is used to trigger an LTE network to initiate handover (HO), a cell change order (CCO), or a redirection process, so that the terminal falls back to 2G/3G.
  • HO handover
  • CCO cell change order
  • redirection process so that the terminal falls back to 2G/3G.
  • Step 702 The MME sends a reject message corresponding to the extended service request to the terminal.
  • the MME sends a SERVICE REJ, which is a reject message corresponding to the extended service request, to the terminal, and returns a reason value 18 of the call failure, wherein the reason 15 indicates that the circuit switch (Circuit Switched, CS for short) domain is unavailable.
  • a SERVICE REJ which is a reject message corresponding to the extended service request
  • the terminal returns a reason value 18 of the call failure, wherein the reason 15 indicates that the circuit switch (Circuit Switched, CS for short) domain is unavailable.
  • Step 703 The terminal switches from the currently accessed Long Term Evolution (LTE) network to the non-LTE standard network.
  • LTE Long Term Evolution
  • Step 704 Proactively initiate a CS voice call process on a non-LTE network.
  • the CS voice call reply procedure is performed in response to the voice page request on the non-LTE system network.
  • the terminal sends an extended service request to the MME, and receives the reject message corresponding to the extended service request sent by the MME to the terminal, and the terminal switches from the currently accessed Long Term Evolution (LTE) network to the non-LTE standard network.
  • LTE Long Term Evolution
  • the CS voice call process is initiated on the non-LTE system to implement the voice call of the terminal, which improves the voice call rate of the terminal and meets the requirements of the user experience.
  • FIG. 9 is a schematic structural diagram of Embodiment 1 of a terminal device according to an embodiment of the present invention. As shown in FIG. 9, the terminal device includes: a determining module 10 and a voice call 11.
  • the determining module 10 is configured to: when the at least one of the two preset conditions is met, switch from the currently accessed Long Term Evolution (LTE) network to the non-LTE standard network; the two preset conditions include:
  • Condition 1 receiving a voice paging request sent by the LTE network when in the LTE network restricted state, the voice paging request is used to call the terminal device to perform a voice call, and the LTE network restriction state can only support the emergency call service, and
  • Condition 2 Sending an extended service request to the LTE network and receiving a reject message corresponding to the extended service request, the extended service request is used to request the LTE network to redirect or switch the terminal device to another communication standard network other than the LTE network.
  • the voice call module 11 is configured to perform a circuit domain CS voice call procedure on a non-LTE system network.
  • the terminal device in this embodiment can perform the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and the beneficial effects are similar, and details are not described herein again.
  • the specific implementation manner of the determining module 10 of the terminal device provided by the present invention may be as follows:
  • the determining module 10 is specifically configured to:
  • condition 1 in response to the voice page request, the switch is actively selected to the currently accessible non-LTE system network.
  • the voice page response is replied to the non-LTE system network.
  • the terminal device in this embodiment may perform the technical solution of the method embodiment shown in FIG. 3, and the implementation principle and the beneficial effects are similar, and details are not described herein again.
  • the determining module 10 is specifically configured to:
  • an extended service request is sent to the LTE network in response to the voice page request, and is redirected or switched from the LTE network to the accessible non-LTE system network under the command of the LTE network.
  • the voice page response is replied to the non-LTE system network.
  • the terminal device in the LTE network restricted state is in the restricted serving cell of the LTE network and only the emergency call bearer is established with the LTE network.
  • voice call module 11 is:
  • the voice call module 11 is specifically configured to:
  • CS is executed in response to a voice page request on a non-LTE system network Voice call reply process.
  • the terminal device in this embodiment can perform the technical solution of the method embodiment shown in FIG. 4, and the implementation principle and the beneficial effects are similar, and details are not described herein again.
  • the voice call module 11 is specifically configured to:
  • the CS voice call flow is actively initiated on the non-LTE system network.
  • the reject message includes a reject reason indication value indicating that the CS domain is unavailable.
  • the terminal device in this embodiment may perform the technical solution of the method embodiment shown in FIG. 5, and the implementation principle and the beneficial effects are similar, and details are not described herein again.
  • FIG. 10 is a schematic structural diagram of Embodiment 2 of the terminal device according to the embodiment of the present invention. As shown in FIG. 10, the terminal device can be implemented as follows:
  • the processor 21 is operative to read the instructions from the memory 20.
  • the processor 21 may be a communication baseband processor.
  • processor 21 is configured to perform the following operations when the instruction is executed:
  • the two preset conditions include:
  • Condition 1 receiving a voice paging request sent by the LTE network when in an LTE network restriction state, where the voice paging request is used to call the terminal device to perform a voice call, and the LTE network restriction state can only support Emergency call service, and
  • Condition 2 sending an extended service request to the LTE network and receiving a reject message corresponding to the extended service request, the extended service request for requesting the LTE network to redirect or switch the terminal device to the LTE network
  • Other communication system networks
  • a circuit domain CS voice call flow is performed on the non-LTE system network.
  • the disclosed system, apparatus and The method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combinations can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明提供一种语音呼叫处理方法及终端设备。该方法包括：终端在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络；在非LTE制式的网络上执行电路域CS语音呼叫流程。本发明实施例提供的语音呼叫处理方法，提高了终端的语音呼通率，满足用户体验的要求。

Description

语音呼叫处理方法及终端设备 技术领域
本发明涉及通信技术，尤其涉及一种语音呼叫处理方法及终端设备。
背景技术
目前，随着智能手机的普及，智能手机厂商之间的竞争也越演越烈，已经逐渐从硬件配置的竞争上升到用户体验的竞争。而语音呼通率是用户体验的关键指标，因此，提高智能手机的语音呼通率尤为重要。
现有技术中，长期演进(Long Term Evolution，简称LTE)采用的主流语音方案是LTE语音(Voice over LTE，简称VoLTE)技术，这种方法的主要思想是利用LTE无线网络和核心分组网演进(Evolved Packet Core，简称EPC)网络提供的网际协议(Internet Protocol，简称IP)承载通道接入IP多媒体子系统(IP Multimedia Subsystem，简称IMS)核心网，由IMS相关业务平台提供语音业务呼叫处理。
但是，采用现有技术的VoLTE方法，当终端处于LTE网络限制状态时，LTE网络接收到其他用户的语音呼叫请求，并将该请求发送给该终端时，由于终端处于LTE网络限制状态，VoLTE只提供紧急服务，因此，处于VoLTE状态的终端将忽略该语音呼叫请求，从而导致其它用户无法成功呼叫该终端，从而降低了智能手机的语音呼通率，用户体验差。
发明内容
本发明提供一种语音呼叫处理方法及终端设备，用以解决现有技术中当终端处于LTE网络限制状态时，采用VoLTE方法进行语音呼叫呼通率低的技术问题。
第一方面，本发明提供一种语音呼叫处理方法：终端在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络；所述两个预设条件包括：
条件1：在处于LTE网络限制状态时接收到所述LTE网络发送的语 音寻呼请求，所述语音寻呼请求用于呼叫所述终端执行语音通话，且所述LTE网络限制状态仅能支持紧急呼叫业务，以及
条件2：向所述LTE网络发送扩展服务请求且收到与该扩展服务请求对应的拒绝消息，所述扩展服务请求用于请求LTE网络将所述终端重定向或切换至所述LTE网络之外的其他通信制式网络；
在所述非LTE制式的网络上执行电路域CS语音呼叫流程。
通过第一方面提供的语音呼叫处理方法，终端在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络，在非LTE制式的网络上执行电路域CS语音呼叫流程，以实现语音通话，故，本发明实施例提供的语音呼叫处理方法，提高了终端的语音呼通率，满足用户体验的要求。
在第一方面的第一种可能的实施方式中，当满足条件1时，所述从当前接入的LTE网络切换到非LTE制式的网络包括：
所述终端响应于所述语音寻呼请求，主动选择切换至当前可接入的所述非LTE制式的网络；
所述方法还包括：所述终端向所述非LTE制式的网络回复语音寻呼响应。
通过该第一种可能的实施方式提供的方法，终端响应于语音寻呼请求，主动选择切换至当前可接入的非LTE制式的网络，并向非LTE制式的网络回复语音寻呼响应，使得终端可以快速地接入非LTE制式的网络。
在第一方面的第二种可能的实施方式中，当满足条件1时，所述终端从当前接入的LTE网络切换到非LTE制式的网络包括：
所述终端响应于所述语音寻呼请求，向所述LTE网络发送所述扩展服务请求，并在所述LTE网络的指令下将所述终端从所述LTE网络重定向或切换到可接入的所述非LTE制式的网络；
所述方法还包括：所述终端向所述非LTE制式的网络回复语音寻呼响应。
通过该第二种可能的实施方式提供的方法，终端响应于语音寻呼请求，向LTE网络发送扩展服务请求，并在LTE网络的指令下将终端从LTE网络重定向或切换到可接入的非LTE制式的网络，并向非LTE制式的网络回复语音寻呼响应，使得终端可以准确地接入可用的非LTE制式的网络。
在第一方面的第三种可能的实施方式中，当满足条件1时，在LTE网络 限制状态下的终端处于所述LTE网络的限制服务小区中且仅与所述LTE网络建立了紧急呼叫承载。
通过该第三种可能的实施方式提供的方法，当满足条件1时，在LTE网络限制状态下的终端处于LTE网络的限制服务小区中且仅与LTE网络建立了紧急呼叫承载，以保证LTE网络下紧急呼叫的通话质量。
在第一方面的第四种可能的实施方式中，当满足条件1时，所述在所述非LTE制式的网络上执行CS语音呼叫流程包括：
在所述非LTE制式的网络上响应于所述语音寻呼请求执行CS语音呼叫回复流程。
通过该第四种可能的实施方式提供的方法，当满足条件1时，在非LTE制式的网络上响应于语音寻呼请求执行CS语音呼叫回复流程，以实现终端的语音通话。
在第一方面的第五种可能的实施方式中，当满足条件2时，所述拒绝消息中包括指示CS域不可用的拒绝原因指示值。
通过该第五种可能的实施方式提供的方法，当满足条件2时，拒绝消息中包括指示CS域不可用的拒绝原因指示值，这样，终端可以根据拒绝消息中的拒绝原因值进行相应的处理。
在第一方面的第六种可能的实施方式中，当满足条件2时，所述在所述非LTE制式的网络上执行CS语音呼叫流程包括：在所述非LTE制式的网络上主动发起CS语音呼叫流程。
通过该第六种可能的实施方式提供的方法，当满足条件2时，在非LTE制式的网络上主动发起CS语音呼叫流程，以实现终端的语音通话。
可选地，所述非LTE制式的网络包括：2G网络或者3G网络。
第二方面，本发明提供一种终端设备，包括：
判断模块，用于判断在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络；所述两个预设条件包括：
条件1：在处于LTE网络限制状态时接收到所述LTE网络发送的语音寻呼请求，所述语音寻呼请求用于呼叫所述终端设备执行语音通话，且所述LTE网络限制状态仅能支持紧急呼叫业务，以及
条件2：向所述LTE网络发送扩展服务请求且收到与该扩展服务请 求对应的拒绝消息，所述扩展服务请求用于请求LTE网络将所述终端设备重定向或切换至所述LTE网络之外的其他通信制式网络；
语音呼叫模块，用于在所述非LTE制式的网络上执行电路域CS语音呼叫流程。
在第二方面的第一种可能的实施方式中，所述判断模块具体用于：
当满足条件1时，响应于所述语音寻呼请求，主动选择切换至当前可接入的所述非LTE制式的网络；
向所述非LTE制式的网络回复语音寻呼响应。
在第二方面的第二种可能的实施方式中，所述判断模块具体用于：
当满足条件1时，响应于所述语音寻呼请求，向所述LTE网络发送所述扩展服务请求，并在所述LTE网络的指令下从所述LTE网络重定向或切换到可接入的所述非LTE制式的网络；
向所述非LTE制式的网络回复语音寻呼响应。
在第二方面的第三种可能的实施方式中，当满足条件1时，在LTE网络限制状态下的所述终端设备处于所述LTE网络的限制服务小区中且仅与所述LTE网络建立了紧急呼叫承载。
在第二方面的第四种可能的实施方式中，所述语音呼叫模块具体用于：
当满足条件1时，在所述非LTE制式的网络上响应于所述语音寻呼请求执行CS语音呼叫回复流程。
在第二方面的第五种可能的实施方式中，当满足条件2时，所述拒绝消息中包括指示CS域不可用的拒绝原因指示值。
在第二方面的第六种可能的实施方式中，所述语音呼叫模块具体用于：
当满足条件2时，在所述非LTE制式的网络上主动发起CS语音呼叫流程。
可选地，所述非LTE制式的网络包括：2G网络或者3G网络。
上述第二方面和第二方面的各可能的实施方式所带来的有益效果，可以对应参照上述第一方面和第一方面的各可能的实施方式所带来的有益效果，在此不再赘述。
第三方面，本发明提供一种终端设备，包括：
处理器；
用于存储处理器可执行指令的存储器；
处理器和存储器通过系统总线相互耦合；处理器用于从存储器读取所述指令；
可选地，所述处理器是通信基带处理器。
其中，处理器被配置为在执行所述指令的时候执行以下操作：
在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络；所述两个预设条件包括：
条件1：在处于LTE网络限制状态时接收到所述LTE网络发送的语音寻呼请求，所述语音寻呼请求用于呼叫所述终端执行语音通话，且所述LTE网络限制状态仅能支持紧急呼叫业务，以及
条件2：向所述LTE网络发送扩展服务请求且收到与该扩展服务请求对应的拒绝消息，所述扩展服务请求用于请求LTE网络将所述终端重定向或切换至所述LTE网络之外的其他通信制式网络；
在所述非LTE制式的网络上执行电路域CS语音呼叫流程。
上述第三方面的实施方式所带来的有益效果，可以对应参照上述第一方面的实施方式所带来的有益效果，在此不再赘述。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的LTE系统架构示意图；
图2为本发明实施例提供的语音呼叫处理方法的实施例一的流程图；
图3为本发明实施例提供的语音呼叫处理方法的实施例二的信令图；
图4为本发明实施例提供的语音呼叫处理方法的实施例三的信令图；
图5为本发明实施例提供的语音呼叫处理方法的实施例四的信令图；
图6为本发明实施例提供的语音呼叫处理方法的实施例五的信令图；
图7为本发明实施例提供的语音呼叫处理方法的实施例六的信令图；
图8为本发明实施例提供的语音呼叫处理方法的实施例七的信令图；
图9为本发明实施例提供的终端设备的实施例一的结构示意图；
图10为本发明实施例提供的终端设备的实施例二的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例涉及的语音呼叫处理方法及终端设备，可以适用于LTE系统的网络架构，还可以适用于下一代(4.5G或者5G)通信系统的网络架构。图1为本发明实施例提供的LTE系统架构示意图，如图1所示，以LTE系统为例，该LTE系统中包括用户设备、演进型基站(Evolved Node B，简称eNodeB)和演进分组核心网(Evolved Packet Core，简称EPC)。其中，EPC负责核心网部分，信令处理部分为移动管理实体(Mobility Management Entity，简称MME)，数据处理部分为服务网关(Serving Gateway，简称S-GW)，eNode B负责接入网部分，也称演进的UMTS陆地无线接入网(Evolved UTRAN，演进的UTRAN)。LTE系统支持与其他3GPP系统互操作，根据双工方式不同LTE系统分为频分双工LTE系统(Frequency Division Duplexing-LTE，简称FDD-LTE)和时分双工LTE系统(Time Division Duplexing-LTE，简称TDD-LTE)。
本发明实施例中涉及的终端，可以为智能手机，也可以为可穿戴设备。
本发明实施例中涉及的移动交换中心(Mobile Switching Center，简称MSC)是在电话和数据系统之间提供呼叫转换服务和呼叫控制的地方。
本发明实施例提供的语音呼叫处理方法及终端设备，用以解决现有技术中当终端处于LTE网络限制状态时，采用VoLTE方法进行语音呼叫呼通率低的技术问题。
下面以具体地实施例对本发明的技术方案进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例中不再赘述。
图2为本发明实施例提供的语音呼叫处理方法的实施例一的流程图，如 图2所示，该方法包括：
步骤101、终端在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络。
在本实施例中，非LTE制式的网络可以是第二代手机通信技术规格(2-Generation wireless telephone technology，简称2G)网络，或者，第三代手机通信技术规格(3-Generation wireless telephone technology，简称3G)网络，但并不以此为限。
其中，两个预设条件包括：
条件1：在处于LTE网络限制状态时接收到LTE网络发送的语音寻呼请求，语音寻呼请求用于呼叫终端执行语音通话，且LTE网络限制状态仅能支持紧急呼叫业务，以及
条件2：向LTE网络发送扩展服务请求且收到与该扩展服务请求对应的拒绝消息，扩展服务请求用于请求LTE网络将终端重定向或切换至LTE网络之外的其他通信制式网络。
在本实施例中，举例说明，当终端A的语音业务处于LTE网络限制状态且仅能支持紧急呼叫业务时，终端A当前驻留的LTE网络收到终端B对终端A的语音寻呼请求，此时，终端A满足条件1。当终端A需要呼叫终端B时，终端A向当前驻留的LTE网络发送扩展服务请求且收到与该扩展服务请求对应的拒绝消息，此时，终端A满足条件2。
步骤102、在非LTE制式的网络上执行电路域(Circuit Switched，简称CS)语音呼叫流程。
在本实施例中，通过在非LTE制式的网络上执行电路域(Circuit Switched，简称CS)语音呼叫流程，以实现语言通话。
在本实施例中，终端在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络，并在非LTE制式的网络上执行电路域CS语音呼叫流程，其中，条件1：在处于LTE网络限制状态时接收到LTE网络发送的语音寻呼请求，语音寻呼请求用于呼叫终端执行语音通话，且LTE网络限制状态仅能支持紧急呼叫业务，以及条件2：向LTE网络发送扩展服务请求且收到与该扩展服务请求对应的拒绝消息，扩展服务请求用于请求LTE网络将终端重定向或切换至LTE网络之外的其他通信制式网 络，这样，终端在满足两个预设条件的至少一项时，也能够进行正常的语音通话，避免了现有技术中，当终端满足任意一项预设条件时，终端无法进行语音通话的问题，从而提高了终端的语音呼通率，满足用户体验的要求。
图3为本发明实施例提供的语音呼叫处理方法的实施例二的信令图，如图3所示，该方法包括：
步骤201、终端处于LTE网络限制状态。
在本实施例中，具体地，终端处于LTE网络限制状态时接收到LTE网络发送的语音寻呼请求，语音寻呼请求用于呼叫终端执行语音通话，且LTE网络限制状态仅能支持紧急呼叫业务。
此外，需要说明的是，在LTE网络限制状态下的终端处于LTE网络的限制服务小区中且仅与LTE网络建立了紧急呼叫承载。
步骤202、LTE网络向终端发送语音寻呼请求。
步骤203、终端响应于语音寻呼请求，主动选择切换至当前可接入的非LTE制式的网络。
步骤204、终端向非LTE制式的网络回复语音寻呼响应。
步骤205、在非LTE制式的网络上执行电路域CS语音呼叫流程。
在本实施例中，具体地，在非LTE制式的网络上响应于语音寻呼请求执行CS语音呼叫回复流程。
在本实施例中，终端响应于语音寻呼请求，主动选择切换至当前可接入的非LTE制式的网络，并向非LTE制式的网络回复语音寻呼响应，使得终端可以快速地接入非LTE制式的网络。
图4为本发明实施例提供的语音呼叫处理方法的实施例三的信令图，如图4所示，该方法包括：
步骤301、终端处于LTE网络限制状态。
步骤302、LTE网络向终端发送语音寻呼请求。
步骤303、终端响应于语音寻呼请求，向LTE网络发送扩展服务请求。
步骤304、LTE网络根据扩展服务请求向终端回复指令。
步骤305、终端根据指令将LTE网络重定向或切换到可接入的非LTE制式的网络。
步骤306、终端向非LTE制式的网络回复语音寻呼响应。
步骤307、在非LTE制式的网络上执行电路域CS语音呼叫流程。
在本实施例中，具体地，在非LTE制式的网络上响应于语音寻呼请求执行CS语音呼叫回复流程。
在本实施例中，终端响应于语音寻呼请求，向LTE网络发送扩展服务请求，并在LTE网络的指令下将终端从LTE网络重定向或切换到可接入的非LTE制式的网络，并向非LTE制式的网络回复语音寻呼响应，使得终端可以准确地接入可用的非LTE制式的网络。
图5为本发明实施例提供的语音呼叫处理方法的实施例四的信令图，如图5所示，该方法包括：
步骤401、终端向LTE网络发送扩展服务请求。
在本实施例中，扩展服务请求用于请求LTE网络将终端重定向或切换至LTE网络之外的其他通信制式网络。
步骤402、LTE网络向终端发送与该扩展服务请求对应的拒绝消息。
在本实施例中，拒绝消息中包括指示CS域不可用的拒绝原因指示值，具体地，原因指示值为18。
步骤403、终端从当前接入的长期演进LTE网络切换到非LTE制式的网络。
步骤404、在非LTE制式的网络上主动发起CS语音呼叫流程。
在本实施例中，具体地，在非LTE制式的网络上响应于语音寻呼请求执行CS语音呼叫回复流程。
在本实施例中，终端向LTE网络发送扩展服务请求，且接收到LTE网络发送的与该扩展服务请求对应的拒绝消息，则终端从当前接入的长期演进LTE网络切换到非LTE制式的网络，在非LTE制式的网络上主动发起CS语音呼叫流程，这样可以实现终端的语音通话，从而提高了终端的语音呼通率，满足用户体验的要求。
图6为本发明实施例提供的语音呼叫处理方法的实施例五的信令图，如图6所示，如图6所示，该方法包括：
步骤501、终端进入限制服务状态。
在本实施例中，举例来说，终端可以通过如下方式进入限制服务状态，首先终端向MME和MSC发送注册请求消息，并向MME拨打VoLTE紧急 呼，以建立终端的紧急承载，MME向终端发送释放普通承载请求，此时，终端释放普通承载，向LTE网络发送挂断VoLTE紧急呼请求，LTE网络接收挂断VoLTE紧急呼请求后释放链路，终端进入限制服务状态。
步骤502、MSC接收语音寻呼请求。
在本实施例中，举例来说，当终端A的语音业务处于LTE网络限制状态时，MSC收到终端B对终端A的语音寻呼请求。
步骤503、MSC向MME发送寻呼请求(PAGING REQ)。
在本实施例中，PAGING REQ包括主叫号码、位置区信息等。
步骤504、MME向终端发送电路域的寻呼请求(CS PAGING)。
步骤505、终端根据CS PAGING，主动选择切换至当前可接入的非LTE制式的网络。
步骤506、终端向MSC发送寻呼响应(PAGING RSP)。
在本实施例中，终端采用非LTE制式的网络向MSC发送寻呼响应(PAGING RSP)。
步骤507、在非LTE制式的网络上执行CS语音呼叫流程。
在本实施例中，终端根据语音寻呼请求，主动选择切换至当前可接入的非LTE制式的网络，使得终端可以快速地接入非LTE制式的网络。
图7为本发明实施例提供的语音呼叫处理方法的实施例六的信令图，如图7所示，该方法包括：
步骤601、终端进入限制服务状态。
步骤602、MSC接收语音寻呼请求。
步骤603、MSC向MME发送寻呼请求(PAGING REQ)。
步骤604、MME向终端发送电路域的寻呼请求(CS PAGING)。
步骤605、终端根据CS PAGING，向MME发送扩展服务请求。
步骤606、LTE网络根据扩展服务请求向终端回复指令。
步骤607、终端根据指令将LTE网络重定向或切换到可接入的非LTE制式的网络。
在本实施例中，举例来说，LTE网络接收终端发送的扩展服务请求，并向终端侧回复重定向指令，终端根据重定向指令执行重定向标准流程将当前接入网的LTE网络重定向到可接入的非LTE网络，但并不以此为限。
步骤608、终端向MSC发送寻呼响应(PAGING RSP)。
步骤609、在非LTE制式的网络上执行电路域CS语音呼叫流程。
在本实施例中，终端响应于语音寻呼请求，向LTE网络发送扩展服务请求，并在LTE网络的指令下将终端从LTE网络重定向或切换到可接入的非LTE制式的网络，并向非LTE制式的网络回复语音寻呼响应，使得终端可以准确地接入可用的非LTE制式的网络。
图8为本发明实施例提供的语音呼叫处理方法的实施例七的信令图，如图8所示，该方法包括：
步骤701、终端向MME发送扩展服务请求。
需要说明的是，扩展服务请求用于触发LTE网络发起切换(Handover，简称HO)、小区切换(Cell Change Order，简称CCO)或者重定向流程使得终端回落到2G/3G。
步骤702、MME向终端发送与该扩展服务请求对应的拒绝消息。
具体地，MME向终端发送与该扩展服务请求对应的拒绝消息即SERVICE REJ，且返回呼叫失败的原因值18，其中，呼叫失败的原因指18表示电路交换(Circuit Switched，简称CS)域不可用。
步骤703、终端从当前接入的长期演进LTE网络切换到非LTE制式的网络。
步骤704、在非LTE制式的网络上主动发起CS语音呼叫流程。
在本实施例中，具体地，在非LTE制式的网络上响应于语音寻呼请求执行CS语音呼叫回复流程。
本实施例中，终端向MME发送扩展服务请求，并接收MME向终端发送的与该扩展服务请求对应的拒绝消息，则终端从当前接入的长期演进LTE网络切换到非LTE制式的网络，在非LTE制式的网络上主动发起CS语音呼叫流程，从而实现终端的语音通话，提高了终端的语音呼通率，满足用户体验的要求。
图9为本发明实施例提供的终端设备的实施例一的结构示意图，如图9所示，该终端设备包括：判断模块10和语音呼叫11。
判断模块10，用于判断在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络；两个预设条件包括：
条件1：在处于LTE网络限制状态时接收到LTE网络发送的语音寻呼请求，语音寻呼请求用于呼叫终端设备执行语音通话，且LTE网络限制状态仅能支持紧急呼叫业务，以及
条件2：向LTE网络发送扩展服务请求且收到与该扩展服务请求对应的拒绝消息，扩展服务请求用于请求LTE网络将终端设备重定向或切换至LTE网络之外的其他通信制式网络。
语音呼叫模块11，用于在非LTE制式的网络上执行电路域CS语音呼叫流程。
本实施例中的终端设备可以执行图2所示方法实施例的技术方案，其实现原理和有益效果相类似，此处不再赘述。
进一步地，在上述实施例一的基础上，本发明提供的终端设备的判断模块10的具体实现方式可以为如下两种：
一种可能的实现方式：
判断模块10具体用于：
当满足条件1时，响应于语音寻呼请求，主动选择切换至当前可接入的非LTE制式的网络。
向非LTE制式的网络回复语音寻呼响应。
本实施例中的终端设备可以执行图3所示方法实施例的技术方案，其实现原理和有益效果相类似，此处不再赘述。
另一种可能的实现方式：
判断模块10具体用于：
当满足条件1时，响应于语音寻呼请求，向LTE网络发送扩展服务请求，并在LTE网络的指令下从LTE网络重定向或切换到可接入的非LTE制式的网络。
向非LTE制式的网络回复语音寻呼响应。
需要说明的是，当满足条件1时，在LTE网络限制状态下的终端设备处于LTE网络的限制服务小区中且仅与LTE网络建立了紧急呼叫承载。
此外，语音呼叫模块11的一种实现方式为：
语音呼叫模块11具体用于：
当满足条件1时，在非LTE制式的网络上响应于语音寻呼请求执行CS 语音呼叫回复流程。
本实施例中的终端设备可以执行图4所示方法实施例的技术方案，其实现原理和有益效果相类似，此处不再赘述。
进一步地，在上述实施例一的基础上，本发明提供的终端设备的语音呼叫模块11的另种实现方式如下：
语音呼叫模块11具体用于：
当满足条件2时，在非LTE制式的网络上主动发起CS语音呼叫流程。
需要说明的是，当满足条件2时，拒绝消息中包括指示CS域不可用的拒绝原因指示值。
本实施例中的终端设备可以执行图5所示方法实施例的技术方案，其实现原理和有益效果相类似，此处不再赘述。
以上描述了终端设备的内部功能模块和结构示意，图10为本发明实施例提供的终端设备的实施例二的结构示意图，如图10所示，终端设备可实现为：
处理器21；
用于存储处理器21可执行指令的存储器20；处理器21和存储器20通过系统总线23相互耦合。处理器21用于从存储器20读取所述指令。可选地，所述处理器21可以是通信基带处理器。
其中，处理器21被配置为在执行所述指令的时候执行以下操作：
在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络；所述两个预设条件包括：
条件1：在处于LTE网络限制状态时接收到所述LTE网络发送的语音寻呼请求，所述语音寻呼请求用于呼叫所述终端设备执行语音通话，且所述LTE网络限制状态仅能支持紧急呼叫业务，以及
条件2：向所述LTE网络发送扩展服务请求且收到与该扩展服务请求对应的拒绝消息，所述扩展服务请求用于请求LTE网络将所述终端设备重定向或切换至所述LTE网络之外的其他通信制式网络；
在所述非LTE制式的网络上执行电路域CS语音呼叫流程。
可以理解，关于本实施例提到的装置的实施例中各单元所执行的具体操作可参照之前方法的实施例的描述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和 方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (14)

  1. 一种语音呼叫处理方法，其特征在于，
    终端在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络；所述两个预设条件包括：
    条件1：在处于LTE网络限制状态时接收到所述LTE网络发送的语音寻呼请求，所述语音寻呼请求用于呼叫所述终端执行语音通话，且所述LTE网络限制状态仅能支持紧急呼叫业务，以及
    条件2：向所述LTE网络发送扩展服务请求且收到与该扩展服务请求对应的拒绝消息，所述扩展服务请求用于请求LTE网络将所述终端重定向或切换至所述LTE网络之外的其他通信制式网络；
    在所述非LTE制式的网络上执行电路域CS语音呼叫流程。
  2. 根据权利要求1所述的方法，其特征在于，当满足条件1时，所述从当前接入的LTE网络切换到非LTE制式的网络包括：
    所述终端响应于所述语音寻呼请求，主动选择切换至当前可接入的所述非LTE制式的网络；
    所述方法还包括：所述终端向所述非LTE制式的网络回复语音寻呼响应。
  3. 根据权利要求1所述的方法，其特征在于，当满足条件1时，所述终端从当前接入的LTE网络切换到非LTE制式的网络包括：
    所述终端响应于所述语音寻呼请求，向所述LTE网络发送所述扩展服务请求，并在所述LTE网络的指令下将所述终端从所述LTE网络重定向或切换到可接入的所述非LTE制式的网络；
    所述方法还包括：所述终端向所述非LTE制式的网络回复语音寻呼响应。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，当满足条件1时，在LTE网络限制状态下的终端处于所述LTE网络的限制服务小区中且仅与所述LTE网络建立了紧急呼叫承载。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，当满足条件1时，所述在所述非LTE制式的网络上执行CS语音呼叫流程包括：
    在所述非LTE制式的网络上响应于所述语音寻呼请求执行CS语音呼叫回复流程。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，当满足条件2时， 所述拒绝消息中包括指示CS域不可用的拒绝原因指示值。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，当满足条件2时，所述在所述非LTE制式的网络上执行CS语音呼叫流程包括：在所述非LTE制式的网络上主动发起CS语音呼叫流程。
  8. 一种终端设备，其特征在于，包括：
    判断模块，用于判断在满足两个预设条件的至少一项时，从当前接入的长期演进LTE网络切换到非LTE制式的网络；所述两个预设条件包括：
    条件1：在处于LTE网络限制状态时接收到所述LTE网络发送的语音寻呼请求，所述语音寻呼请求用于呼叫所述终端设备执行语音通话，且所述LTE网络限制状态仅能支持紧急呼叫业务，以及
    条件2：向所述LTE网络发送扩展服务请求且收到与该扩展服务请求对应的拒绝消息，所述扩展服务请求用于请求LTE网络将所述终端设备重定向或切换至所述LTE网络之外的其他通信制式网络；
    语音呼叫模块，用于在所述非LTE制式的网络上执行电路域CS语音呼叫流程。
  9. 根据权利要求8所述的终端设备，其特征在于，所述判断模块具体用于：
    当满足条件1时，响应于所述语音寻呼请求，主动选择切换至当前可接入的所述非LTE制式的网络；
    向所述非LTE制式的网络回复语音寻呼响应。
  10. 根据权利要求8所述的终端设备，其特征在于，所述判断模块具体用于：
    当满足条件1时，响应于所述语音寻呼请求，向所述LTE网络发送所述扩展服务请求，并在所述LTE网络的指令下从所述LTE网络重定向或切换到可接入的所述非LTE制式的网络；
    向所述非LTE制式的网络回复语音寻呼响应。
  11. 根据权利要求8-10任一项所述的终端设备，其特征在于，当满足条件1时，在LTE网络限制状态下的所述终端设备处于所述LTE网络的限制服务小区中且仅与所述LTE网络建立了紧急呼叫承载。
  12. 根据权利要求8-11任一项所述的终端设备，其特征在于，所述语音 呼叫模块具体用于：
    当满足条件1时，在所述非LTE制式的网络上响应于所述语音寻呼请求执行CS语音呼叫回复流程。
  13. 根据权利要求8-12任一项所述的终端设备，其特征在于，当满足条件2时，所述拒绝消息中包括指示CS域不可用的拒绝原因指示值。
  14. 根据权利要求8-13任一项所述的终端设备，其特征在于，所述语音呼叫模块具体用于：
    当满足条件2时，在所述非LTE制式的网络上主动发起CS语音呼叫流程。
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