WO2017075814A1 - 一种语音漫游方法，移动性管理网元及接入网网元 - Google Patents

一种语音漫游方法，移动性管理网元及接入网网元 Download PDF

Info

Publication number
WO2017075814A1
WO2017075814A1 PCT/CN2015/094016 CN2015094016W WO2017075814A1 WO 2017075814 A1 WO2017075814 A1 WO 2017075814A1 CN 2015094016 W CN2015094016 W CN 2015094016W WO 2017075814 A1 WO2017075814 A1 WO 2017075814A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
network element
mobility management
management network
vplmn
Prior art date
Application number
PCT/CN2015/094016
Other languages
English (en)
French (fr)
Inventor
崇卫微
吴晓波
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/094016 priority Critical patent/WO2017075814A1/zh
Priority to CN201580083881.0A priority patent/CN108141741B/zh
Priority to EP15907656.1A priority patent/EP3364674B1/en
Publication of WO2017075814A1 publication Critical patent/WO2017075814A1/zh
Priority to US15/971,865 priority patent/US10390209B2/en

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/80—Arrangements enabling lawful interception [LI]
    • 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]
    • H04W36/00226—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] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a voice roaming method, a mobility management network element, and an access network element.
  • VoLTE Voice over LTE
  • IMS Internet Protocol Multimedia Subsystem
  • 4G fourth generation mobile communication technology
  • S8HR The Home Routed over S8 interface
  • Figure 1 is a schematic diagram of the VoLTE S8HR architecture.
  • the visited Public Land Mobile Network selects the Home Public Land Mobile Netwrok for the terminal.
  • the Public Data Network Gateway (PGW) in the abbreviation HPLMN establishes a connection and sends the registration information to the IMS device in the HPLMN for registration.
  • SRVCC Single Radio Voice Call Continuity
  • S8HR roaming architecture Single Radio Voice Call Continuity
  • SRVCC Single Radio Voice Call Continuity
  • LTE Long Term Evolution
  • CS 2G/3G circuit switching
  • the embodiment of the invention provides a voice roaming method, a mobility management network element and an access network element, to solve the problem that the SVHR roaming architecture cannot meet the SRVCC interruption delay requirement.
  • a voice roaming method including:
  • the mobility management network element determines that the terminal is a terminal roaming into the visited public land mobile network VPLMN and the terminal is capable of using the long term evolution network based voice transmission VoLTE service in the VPLMN;
  • the mobility management network element disables the single wireless voice call continuity SRVCC function of the terminal.
  • the mobility management network element determines that the terminal is a roaming terminal and the roaming network supports the VoLTE service, the SRVCC function of the terminal is prohibited, and the access network element is notified, so that the access network element prohibits the terminal. Trigger the SRVCC process.
  • the method further includes:
  • the mobility management network element determines that the VoLTE service of the terminal needs to be based on an S8 interface home route S8HR communication architecture.
  • the mobility management network element determines that the VoLTE service of the terminal needs to be based on an S8HR communication architecture, including:
  • the mobility management network element searches for preset configuration information corresponding to the HPLNM identification information, where the configuration information includes roaming agreement information between the visited public land mobile network VPLMN and the HPLMN corresponding to the HPLMN identifier;
  • the mobility management network element determines that the VoLTE service of the terminal needs to be based on the S8HR communication architecture.
  • the mobility management network element determines that the VoLTE service of the terminal needs to be based on an S8HR communication architecture, including:
  • the mobility management network element acquires subscription data of the terminal
  • the mobility management network element determines, according to the subscription data, that the VoLTE service of the terminal needs to be based on an S8HR communication architecture.
  • the mobility management network element prohibits the SRVCC function of the terminal, including:
  • the mobility management network element sends first indication information to the network element of the access network, where the first indication information is used to indicate that the mobility management network element does not support the SRVCC function for the terminal.
  • the mobility management network element sends the first indication information to the network element of the access network, including:
  • the mobility management network element sets the SRVCC operation feasibility value to a negative value
  • the mobility management network element sends the SRVCC operational feasibility value to the access network element, where the SRVCC operational feasibility value is used to indicate that the mobility management network element does not support the SRVCC function for the terminal.
  • the mobility management network element prohibits the SRVCC function of the terminal, including:
  • the mobility management network element sends second indication information to the access network network element, where the second indication information is used to notify the access network element that the terminal is a roaming terminal, and the VoLTE service needs to be based on S8HR communication.
  • the architecture is such that the access network element prohibits triggering the SRVCC process on the terminal.
  • the mobility management network element prohibits the single wireless voice call continuity SRVCC function of the terminal, including:
  • the handover request message is used to trigger an SRVCC handover procedure, and the mobility management network element rejects the handover Request message.
  • the method also includes:
  • the mobility management network element determines that the VPLMN supports SRVCC functionality for non-roaming terminals and/or roaming terminals that do not employ the S8HR communication architecture.
  • a voice roaming method including:
  • the access network element receives the indication information of the transmission of the mobility management network element, where the indication information is used to indicate that the mobility management network element does not support the single wireless voice call continuity SRVCC function to the terminal, or is used to notify the
  • the access network element terminal is a roaming terminal and the VoLTE service needs to be based on an S8HR communication architecture;
  • the access network element prohibits triggering a single wireless voice call continuity SRVCC process to the terminal according to the indication information.
  • the mobility management network element determines that the terminal is a roaming terminal and the roaming network supports the VoLTE service, the SRVCC function of the terminal is prohibited, and the access network element is notified, so that the access network element prohibits the terminal. Trigger the SRVCC process.
  • the method further includes:
  • the access network element network element receives a bearer setup request sent by the mobility management network element, where the bearer setup request is used to request to establish a VoLTE service bearer for the terminal;
  • the access network element network element rejects the bearer setup request.
  • the access network element can convert the volte call initiated by the UE to the CSFB call actively or passively under the necessary conditions, and try to avoid triggering the SRVCC to the UE and the network side SVRCC scenarios are not supported to avoid call failures and dropped calls.
  • a voice roaming method including:
  • the mobility management network element determines that the terminal is a terminal roaming into the visited public land mobile network VPLMN and the terminal is capable of using the long term evolution network based voice transmission VoLTE service in the VPLMN;
  • the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal;
  • the mobility management network element determines that the terminal needs to be legally monitored
  • the mobility management network element rejects the bearer setup request.
  • the mobility management network element determines that the terminal is a roaming terminal, and the VPLMN cannot perform VoLTE to the terminal.
  • the mobility management network element rejects the establishment of the VoLTE service bearer of the terminal, so that the VPLMN cannot perform lawful interception on the VoLTE call of the roaming terminal.
  • the mobility management network element can treat the ramming terminal differently.
  • the VPLMN translates its VoLTE call setup process into a CSFB call setup process, ensuring that the terminal can be monitored in the CS domain using existing mechanisms while ensuring that it is not perceived by the terminal.
  • the method further includes:
  • the mobility management network element determines that the VoLTE service of the terminal needs to be based on an S8 interface home route S8HR communication architecture.
  • the mobility management network element determines that the VoLTE service of the terminal needs to be based on an S8HR communication architecture, including:
  • the mobility management network element searches for preset configuration information corresponding to the HPLNM identification information, where the configuration information includes roaming agreement information between the visited public land mobile network VPLMN and the HPLMN corresponding to the HPLMN identifier;
  • the mobility management network element determines that the long-term evolution based voice transmission VoLTE service of the terminal needs to be based on an S8HR communication architecture.
  • the mobility management network element determines that the VoLTE service of the terminal needs to be based on an S8HR communication architecture, including:
  • the mobility management network element acquires subscription data of the terminal
  • the mobility management network element determines, according to the subscription data, that the VoLTE service of the terminal needs to be based on an S8HR communication architecture.
  • the mobility management network element determines that the VPLMN cannot be used by the terminal.
  • Legal listening for VoLTE sessions including:
  • the lawful interception function is not deployed for the S8HR communication architecture, and the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal, including:
  • the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the foregoing is based on VoLTE call signaling and/or session content between the terminal and the HPLMN, where the mobility is
  • the management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal, including:
  • the mobility management network element receives first indication information sent by the network device of the HPLMN, where the first indication information is used to indicate that the VoLTE session of the S8HR roaming terminal for the terminal or all the S8HR roaming terminals is encrypted. Or encryption is not turned off;
  • the mobility management network element determines that VoLTE call signaling and/or session content between the terminal and the HPLMN is encrypted
  • the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the mobility is performed according to VoLTE call signaling and/or session content between the terminal and the HPLMN, where the mobility is
  • the management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal, including:
  • the mobility management network element receives the second indication information sent by the lawful interception execution device, where the second indication information is used to indicate that the encrypted or encrypted for the terminal VoLTE session is not closed;
  • the mobility management network element determines that VoLTE call signaling and/or session content between the terminal or all S8HR roaming terminals from the HPLMN and the HPLMN is encrypted;
  • the mobility management network element determines that the VPLMN cannot enter the VoLTE session of the terminal Lawful interception.
  • the fourth aspect and the fifth aspect further provide a mobility management network element, where the mobility management network element has a function of implementing mobility management network element behavior in the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • a fourth aspect provides a mobility management network element, including: a processor;
  • the processor is configured to determine that the terminal is a terminal that roams into the visited public land mobile network VPLMN and the terminal is capable of using the long term evolution network based voice transmission VoLTE service in the VPLMN;
  • the processor is further configured to disable a single wireless voice call continuity SRVCC function of the terminal.
  • the processor is further configured to determine that the VoLTE service of the terminal needs to be based on an S8 interface home route S8HR communication architecture.
  • the processor is specifically configured to acquire the home public land mobile network HPLMN identification information of the terminal;
  • the processor is further configured to search for preset configuration information corresponding to the HPLNM identification information, where the configuration information includes roaming agreement information between the visited public land mobile network VPLMN and the HPLMN corresponding to the HPLMN identifier. ;
  • the processor is further configured to determine that the VoLTE service of the terminal needs to be based on the S8HR communication architecture.
  • the processor is specifically configured to acquire subscription data of the terminal
  • the processor is further configured to determine, according to the subscription data, that the VoLTE service of the terminal needs to be based on an S8HR communication architecture.
  • the mobility management network element further includes a transmitter
  • the transmitter is configured to send first indication information to the access network element, where the first indication information is used by The mobile management network element is instructed to not support the SRVCC function for the terminal.
  • the processor is specifically configured to set an SRVCC operation feasibility value to a negative value
  • the transmitter is specifically configured to send the SRVCC operational feasibility value to the access network element, where the SRVCC operational feasibility value is used to indicate that the mobility management network element does not support the SRVCC function for the terminal.
  • the mobility management network element further includes: a transmitter;
  • the transmitter is configured to send second indication information to the network element of the access network, where the second indication information is used to notify the network element of the access network that the terminal is a roaming terminal, and the VoLTE service needs to be based on S8HR communication.
  • the architecture is such that the access network element prohibits triggering the SRVCC process on the terminal.
  • the handover request message is used to trigger an SRVCC handover procedure, and the processor screenshot is used to reject the handover request message.
  • the processor is further configured to determine that the VPLMN supports SRVCC functionality for a non-roaming terminal and/or a roaming terminal that does not employ an S8HR communication architecture.
  • a mobility management network element including:
  • a determining unit configured to determine that the terminal is a terminal roaming into the visited public land mobile network VPLMN and the terminal is capable of using the long term evolution network based voice transmission VoLTE service in the VPLMN;
  • a prohibition unit for prohibiting a single wireless voice call continuity SRVCC function of the terminal is a prohibition unit for prohibiting a single wireless voice call continuity SRVCC function of the terminal.
  • the determining unit is further configured to: determine that the VoLTE service of the terminal needs to be based on an S8 interface home route S8HR communication architecture.
  • the determining unit is specifically configured to:
  • configuration information corresponding to the HPLNM identification information includes roaming agreement information between the visited public land mobile network VPLMN and the HPLMN corresponding to the HPLMN identifier;
  • the determining unit is specifically configured to:
  • the mobility management network element further includes:
  • a sending unit configured to send the first indication information to the network element of the access network, where the first indication information is used to indicate that the mobility management network element does not support the SRVCC function for the terminal.
  • the mobility management network element further includes:
  • the sending unit is specifically configured to send the SRVCC operational feasibility value to the access network element, where the SRVCC operational feasibility value is used to indicate that the mobility management network element does not support the SRVCC function for the terminal.
  • the mobility management network element further includes:
  • a sending unit configured to send second indication information to the access network network element, where the second indication information is used
  • the terminal of the access network element is informed that the terminal is a roaming terminal, and the VoLTE service needs to be based on an S8HR communication architecture, so that the access network element prohibits the SRVCC process from being triggered to the terminal.
  • the prohibition unit is specifically configured to:
  • the handover request message is used to trigger the SRVCC handover procedure, and reject the handover request message.
  • the determining unit is further configured to: determine that the VPLMN supports the SRVCC function for the non-roaming terminal and/or the roaming terminal that does not adopt the S8HR communication architecture.
  • the sixth aspect and the seventh aspect further provide an access network element, where the access network element has the function of implementing the behavior of the access network element in the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • a sixth aspect further provides an access network element, including: a receiver and a processor; wherein
  • the receiver is configured to receive the indication information of the transmission of the mobility management network element, where the indication information is used to indicate that the mobility management network element does not support the single wireless voice call continuity SRVCC function, or is used to notify the terminal
  • the access network element terminal is a roaming terminal and the VoLTE service needs to be based on an S8HR communication architecture;
  • the processor is configured to, according to the indication information, prohibit a single wireless voice call continuity SRVCC process from being triggered to the terminal.
  • the receiver is further configured to receive a bearer setup request sent by the mobility management network element, where the bearer setup request is used to request to establish a VOLTE service bearer for the terminal;
  • the processor is further configured to reject the bearer setup request.
  • the seventh aspect provides an access network element, including:
  • a receiving unit configured to receive the indication information of the transmission of the mobility management network element, where the indication information is used to indicate that the mobility management network element does not support the single wireless voice call continuity SRVCC function to the terminal, or is used to notify the
  • the access network element terminal is a roaming terminal and the VoLTE service needs to be based on an S8HR communication architecture
  • the forbidden unit is configured to, according to the indication information, prohibit the triggering of a single wireless voice call continuity SRVCC procedure for the terminal.
  • the receiving unit is further configured to receive a bearer setup request sent by the mobility management network element, where the bearer setup request is used to request to establish a VoLTE service bearer for the terminal;
  • the access network element further includes:
  • a rejecting unit configured to reject the bearer setup request if it is determined that the LTE network signal quality of the terminal is lower than a set value.
  • the eighth aspect and the ninth aspect further provide a mobility management network element, wherein the mobility management network element has a function of implementing mobility management network element behavior in the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • a mobility management network element including: a processor;
  • the processor is configured to determine that the terminal is a terminal that roams into the visited public land mobile network VPLMN and the terminal is capable of using the long term evolution network based voice transmission VoLTE service in the VPLMN;
  • the processor is further configured to determine that the VPLMN cannot perform lawful interception on a VoLTE session of the terminal;
  • the processor is further configured to determine that the terminal needs to be legally monitored
  • the bearer setup request sent by the core network gateway is received, the bearer setup request is used to request to establish a VoLTE service bearer for the terminal, and the processor is further configured to reject the bearer setup request.
  • the processor is further configured to determine that the VoLTE service of the terminal needs to be based on an S8 interface home route S8HR communication architecture.
  • the processor is specifically configured to acquire the home public land mobile network HPLMN identification information of the terminal;
  • the processor is further configured to search for preset configuration information corresponding to the HPLNM identification information, where the configuration information includes roaming agreement information between the visited public land mobile network VPLMN and the HPLMN corresponding to the HPLMN identifier. ;
  • the processor is further configured to determine that the long-term evolution-based voice transmission of the terminal is based on the S8HR communication architecture.
  • the processor is specifically configured to acquire subscription data of the terminal
  • the processor is further configured to determine, according to the subscription data, that the VoLTE service of the terminal needs to be based on an S8HR communication architecture.
  • the lawful interception function is not configured for the S8HR communication architecture, and the processor is specifically configured to determine that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the processor is specifically configured to determine that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the mobility management network element further includes: a receiver
  • the receiver is configured to receive first indication information sent by a network device of the HPLMN, where the first indication information is used to indicate that a VoLTE session for the terminal or all S8HR roaming terminals from the HPLMN is encrypted. Or encryption is not turned off;
  • the processor is further configured to determine VoLTE call signaling between the terminal and the HPLMN And/or session content is encrypted;
  • the processor is further configured to determine that the VPLMN cannot perform lawful interception on a VoLTE session of the terminal.
  • the receiver is specifically configured to receive second indication information sent by a legal interception execution device, where the second indication information is used to indicate VoLTE between the S8HR roaming terminal and the HPLMN for the terminal or from the HPLMN
  • the session is encrypted or encrypted is not closed;
  • the processor is specifically configured to determine that VoLTE call signaling and/or session content between the terminal and the HPLMN is encrypted
  • the processor is further configured to determine that the VPLMN cannot perform lawful interception on a VoLTE session of the terminal.
  • a mobility management network element including:
  • a determining unit configured to determine that the terminal is a terminal roaming into the visited public land mobile network VPLMN and the terminal is capable of using the long term evolution network based voice transmission VoLTE service in the VPLMN;
  • the determining unit is further configured to determine that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal;
  • the determining unit is further configured to determine that the terminal needs to be legally monitored
  • the rejecting unit is configured to: if the bearer setup request sent by the core network gateway is received, the bearer setup request is used to request to establish a VoLTE service bearer for the terminal, and the bearer setup request is rejected.
  • the determining unit is further configured to: determine that the VoLTE service of the terminal needs to be based on an S8 interface home route S8HR communication architecture.
  • the determining unit is specifically configured to:
  • configuration information corresponding to the HPLNM identification information includes roaming agreement information between the visited public land mobile network VPLMN and the HPLMN corresponding to the HPLMN identifier;
  • the long-term evolution based voice transmission VoLTE service of the terminal needs to be based on the S8HR communication architecture.
  • the determining unit is specifically configured to:
  • the determining unit is specifically configured to:
  • the VPLMN does not deploy a lawful interception function for the S8HR communication architecture, it is determined that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the determining unit is specifically configured to:
  • the VPLMN cannot legally monitor the VoLTE session of the terminal.
  • the method further includes:
  • a receiving unit configured to receive first indication information sent by a network device of the HPLMN, where the first indication information is used to indicate encryption or encryption of a VoLTE session for the terminal or all S8HR roaming terminals from the HPLMN Not closed;
  • the determining unit is specifically configured to determine that VoLTE call signaling and/or session content between the terminal and the HPLMN is encrypted;
  • the determining unit is further configured to determine that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the mobility management network element further includes:
  • a receiving unit configured to receive second indication information sent by the legal intercepting execution device, where the second indication information is used to indicate a VoLTE session between the S8HR roaming terminal and the HPLMN for the terminal or from the HPLMN Encrypted or encrypted is not closed;
  • the determining unit is specifically configured to determine that VoLTE call signaling and/or session content between the terminal and the HPLMN is encrypted;
  • the determining unit is further configured to determine that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • Embodiments A voice roaming method, a mobility management network element, and an access network element provided by an embodiment of the present invention have the following beneficial effects:
  • the mobility management network element determines that the terminal is a roaming terminal that supports the VoLTE service, the SRVCC function of the terminal is prohibited, and the access network element is notified, so that the access network element prohibits the SRVCC process from being triggered to the terminal, and avoids roaming.
  • the VoLTE session of the terminal may result in a poor user experience due to entering the SRVCC process;
  • the mobility management network element determines that the terminal is a terminal that supports the VoLTE service that is roaming into the VPLMN, and the VPLMN cannot perform lawful interception on the terminal's VoLTE session, and the mobility management network element determines that the terminal needs to be legally monitored, mobility management.
  • the network element rejects the bearer establishment, so that in the case that the VPLMN cannot legally listen to the VoLTE call of the roaming terminal, the mobility management network element can treat the flooded user differently, and rejects the bearer setup request only for the roaming terminal that needs to be intercepted.
  • FIG. 1 is a schematic diagram of a VoLTE S8HR architecture
  • FIG. 2 is a schematic flowchart of a voice roaming method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart diagram of another voice roaming method according to an embodiment of the present disclosure.
  • Figure 4 is a schematic diagram of the process of calling VoLTE to CSFB
  • FIG. 5 is a schematic diagram of a flow of a called VoLTE to CSFB;
  • FIG. 6 is a schematic flowchart diagram of still another voice roaming method according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a mobility management network element according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of another mobility management network element according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of an access network element according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of another access network element according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of still another mobility management network element according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of still another mobility management network element according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of still another access network element according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of still another mobility management network element according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a voice roaming method according to an embodiment of the present invention, where the method includes the following steps:
  • the mobility management network element determines that the terminal is a terminal that roams into the visited public land mobile network VPLMN and the terminal is capable of using the long term evolution network based voice transmission VoLTE service in the VPLMN.
  • the terminal in this embodiment is a roaming user roaming into the VPLMN from the HPLMN.
  • the roaming terminal initiates an Evolved Packet System (EPS) registration in the VPLMN, and may also need to initiate an IMS registration request message to the IMS network of its HPLMN. Therefore, the registration request message includes an EPS registration request message or an IMS registration request message.
  • the mobility management network element may determine that the terminal is a terminal that roams into the VPLMN and can use the VoLTE service in the VPLMN.
  • the mobility management network element is located in the VPLMN and may be a Mobility Management Entity (MME).
  • MME Mobility Management Entity
  • the mobility management network element disables the SRVCC function of the terminal.
  • the access network element For a roaming terminal that is originally in the VoLTE service, if the LTE signal quality in the area where the LTE coverage is not good enough is insufficient to continue to support the VoLTE session requirement of the terminal, the access network element triggers the SRVCC handover procedure to the VoLTE session of the terminal.
  • the CS session of the traditional 2G/3G session is continued to ensure that the voice call of the user is not interrupted.
  • the standard requires that the voice interruption delay caused by the entire handover process cannot exceed 300 ms.
  • the SRVCC handover of the terminal may be possible in the roaming situation. The standard requirements cannot be met. Therefore, the mobility management network element determines that the terminal is roaming into the VPLMN. When the terminal supporting the VoLTE service is enabled, the SRVCC function of the terminal is prohibited, thereby preventing the access network element from triggering the SRVCC handover procedure of the terminal.
  • the mobility management network element sends indication information to an access network element.
  • the mobility management network element After determining that the SRVCC function of the terminal is prohibited, the mobility management network element sends the indication information to the network element of the access network, where the indication information is used to indicate that the mobility management network element does not support the SRVCC function, and/or is used to notify the
  • the access network element terminal is a roaming terminal and the VoLTE service needs to be based on an S8HR communication architecture.
  • the VoLTE service based on the S8HR communication architecture in the prior art, no matter how the operation is performed, the SRVCC handover cannot meet the standard delay requirement.
  • the access network element receives the indication information of the mobility management network element.
  • the access network element prohibits triggering the SRVCC process on the terminal according to the indication information.
  • the access network element After receiving the indication information sent by the mobility management network element, the access network element prohibits the SRVCC process from being triggered to the terminal, thereby preventing the access network element from triggering the SRVCC handover process of the terminal.
  • the mobility management network element may also not send the indication information to the access network network element, but when the mobility management network element receives the access network element, the When the handover request message of the terminal is used, the handover request message is used to trigger an SRVCC handover procedure, and the mobility management network element rejects the handover request message, and the access network element does not need to take any operation.
  • the mobility management network element determines that the terminal is a roaming terminal and the roaming terminal supports the VoLTE service roaming terminal, the SRVCC function of the terminal is prohibited, and the access network is notified.
  • the network element so that the access network element prohibits the SRVCC process from being triggered on the terminal.
  • FIG. 3 is a schematic flowchart of another voice roaming method according to an embodiment of the present invention, where the method includes the following steps:
  • the mobility management network element of the VPLMN receives the registration request message of the terminal.
  • the roaming terminal When the registration process of the EPS network of the VPLMN is initiated, the roaming terminal sends an EPS registration request (EPS attach request)/Tracking Area Update (TAU) request message to the mobility management network element of the VPLMN.
  • EPS registration request EPS attach request
  • TAU Track Area Update
  • the terminal when the network side and the terminal side support both VoLTE and Circuit Switched Fallback (CSFB) services, the terminal will The attach type/EPS update type cell in the EPS attach request/TAU request message is set to the combined EPS/IMSI attach/combined tracking area location area update (combined TA/LA update), the attachment type/EPS update type cell is used to inform the network side terminal to request simultaneous registration in the 4G network EPS domain and the CS domain of the 2G/3G network.
  • CSFB Circuit Switched Fallback
  • the registration request message in step 201 includes an EPS registration request message or an IMS registration request message.
  • the mobility management network element determines that the terminal is a terminal that supports the VoLTE service that roams into the VPLMN.
  • the mobility management network element may determine that the terminal is a terminal that supports the VoLTE service roaming into the VPLMN. For example, the mobility management network element may obtain the terminal identifier according to the user registration data obtained in the EPS registration request message or the IMS registration request message or the registration process, and determine whether the terminal identifier belongs to the local terminal identifier range covered by the VPLMN, thereby determining the location.
  • the terminal is a roaming terminal; the mobility management network element may further determine, according to the EPS registration request message or the IMS registration request message or the HPLMN identifier of the acquiring terminal in the user subscription data obtained in the registration process, whether the HPLMN identifier and the VPLMN are The same, thereby determining that the terminal is a roaming terminal.
  • the mobility management network element may specifically determine, according to the combination of one or more of the following manners, that the terminal can use the VoLTE service in the VPLMN:
  • the mobility management network element can determine whether the terminal can use the VoLTE service in the VPLMN according to the user subscription data obtained in the registration process.
  • the registration process here may be an EPS registration process or an IMS registration process.
  • the mobility management network element may obtain the indication information of the terminal, and the indication information indicating that the VTLMN service can be used by the VPLMN terminal, the mobility management network element may determine, according to the indication information, that the terminal is in the VPLMN. Can use VoLTE services.
  • the mobility management network element may determine that the terminal can use the VoLTE service in the VPLMN according to the STN-SR included in the acquired user subscription data.
  • the mobility management network element may determine whether a VoLTE roaming protocol exists between the VPLMN and the HPLMN of the terminal, or allow configuration information of the VoLTE service to be provided to the HPLMN terminal, and determine whether the terminal can use the VPLMN according to the configuration. VoLTE business. S203, the moving The sex management network element determines that the VoLTE service of the terminal needs to be based on the S8 interface home route S8HR communication architecture.
  • the roaming terminal supporting the VoLTE service includes an S8HR roaming terminal
  • the S8HR roaming terminal refers to a roaming terminal that needs to adopt the S8HR communication mechanism for VoLTE.
  • step S203 includes:
  • the mobility management network element acquires an HPLMN identifier of the terminal
  • the mobility management network element searches for preset configuration information corresponding to the HPLNM identification information, where the configuration information includes roaming agreement information between the visited public land mobile network VPLMN and the HPLMN corresponding to the HPLMN identifier; If it is found that there is S8HR roaming agreement information between the HPLMN and the VPLMN, the mobility management network element determines that the VoLTE service of the terminal needs to be based on the S8HR communication architecture.
  • the mobility management network element may be configured according to the configuration information.
  • the configuration information e.g., when the mobility management network element receives the registration request message of the terminal, the HPLMN ID of the terminal is identified, and the mobility management network element queries the internal configuration information by using the HPLMN ID. If the S8HR roaming protocol is configured between the VPLMN and the HPLMN, The mobility management network element determines that the terminal is an S8HR roaming terminal.
  • the VPLMN when the VPLMN is configured to provide the S8HR VoLTE roaming service from the other HPLMN roaming terminals, the VPLMN does not need to acquire the HPLMN ID of the terminal, and directly determines, according to the configuration information, that the terminal is an S8HR roaming terminal. .
  • step S203 includes:
  • the mobility management network element acquires subscription data of the terminal
  • the mobility management network element determines, according to the subscription data, that the terminal needs to be based on the S8HR communication architecture of the VoLTE service of the VPLMN.
  • the mobility management network element determines, according to the subscription data of the terminal, that the subscription data of the terminal may or may not contain some specific indication information, and the mobility management network element may determine that the terminal is an S8HR roaming terminal.
  • the terminal does not contain specific indication information.
  • the subscription data of the terminal will be IMS access point name for VPLMN (Access Point Name, APN for short), a visited address allowed (VAA) identifier is used to indicate that the terminal can use the LBO roaming architecture to make a VoLTE call in the VPLMN.
  • VAA visited address allowed
  • the mobility management network element determines that the IMS APN for the VPLMN in the subscription data of the terminal does not include the VAA flag, it can be determined that the terminal is an S8HR roaming terminal.
  • Another case is to include specific indication information, that is, the embodiment of the present invention enhances the subscription data of the terminal, and adds indication information about whether the VPLMN uses the S8HR roaming protocol. If the mobility management network element determines that the subscription data of the terminal includes indication information for using the S8HR roaming protocol for the VPLMN, the mobility management network element may determine that the terminal is an S8HR roaming terminal.
  • the mobility management network element determines based on a specific Session Tranfer Number for SRVCC (STN-SR).
  • STN-SR Session Tranfer Number for SRVCC
  • the specific STN-SR number may be a number in a specific coding manner, such as an all-one number.
  • the IMS network device such as P-CSCF/ATCF, etc.
  • the terminal initiates an IMS registration request message in the VPLMN, the registration request
  • the message will be transmitted to the HPLMN's IMS network.
  • the terminal is determined to be an S8HR roaming out user (specifically, it is determined that the terminal has roamed out of the HPLMN, and the S8HR roaming architecture needs to be used for VoLTE between the roaming VPLMN and the HPLMN. Service), the IMS network device allocates a specific STN-SR to the terminal, and the specific STN-SR is transmitted to the HSS and finally transmitted to the mobility management network element of the VPLMN.
  • the mobility management network element can determine at this time that the terminal is an S8HR roaming terminal according to a specific STN-SR (generally received an ordinary STN-SR).
  • the HPLMN may pre-set the STN-SR number of all the contracted terminals to a specific STN-SR in the HSS, and when the terminal initiates registration with the HPLMN IMS network, the HPLMN IMS network device determines the terminal. If the non-S8HR roams out the user, the IMS network device allocates a new non-specific STN-SR to the terminal. Conversely, if the HPLMN IMS network device determines that the terminal is an S8HR roaming out user, the STN-SR of the terminal is not modified.
  • the STN-SR corresponding to the terminal is transmitted to the mobility management network element of the VPLMN in the IMS registration process, and the mobility management network element can determine that the terminal is an S8HR roaming terminal according to the specific STN-SR.
  • the mobility management network element determines that the VPLMN supports the SRVCC function for the non-roaming terminal and/or the roaming terminal that does not adopt the S8HR communication architecture.
  • the mobility management network element prohibits continuity of a single wireless voice call of the terminal. SRVCC function.
  • step S204 includes:
  • the mobility management network element sends first indication information to the network element of the access network, where the first indication information is used to indicate that the mobility management network element does not support the SRVCC function for the terminal.
  • the mobility management network element sends the first indication information to the network element of the access network, where the first indication information is used to indicate that the mobility management network element does not support the SRVCC function for the terminal, including:
  • the mobility management network element sets the SRVCC operation feasibility value to a negative value
  • the mobility management network element sends the SRVCC operational feasibility value to the access network element, where the SRVCC operational feasibility value is used to indicate that the access network element does not support the SRVCC function for the terminal.
  • the mobility management network element sets the SRVCC operation possible value to a negative value (such as false or acceptable), and sends the updated value to the access network.
  • the element informs the access network element that the SRVCC operation is not supported on the terminal. It should be noted that the value may also be a negative value, and the value need not be updated when setting. According to the prior art, after receiving the negative SRVCC operation possible value, the access network element does not trigger the SRVCC process for the terminal under any conditions.
  • the mobility management network element may specifically have a negative value of SRVCC in a message such as a user initial context setup request/user context modification request (downlink NAS transport) or a downlink non-access layer transport (downlink NAS transport).
  • the operation possible value is sent to the access network element.
  • step S204 includes:
  • the mobility management network element sends second indication information to the access network network element, where the second indication information is used to notify the access network element that the terminal is a roaming terminal, and the VoLTE service needs to be based on S8HR communication.
  • the architecture is such that the access network element prohibits triggering the SRVCC process on the terminal.
  • the mobility management network element sends indication information to the access network element, where the indication information is used to notify the access network element that the terminal is an S8HR terminal, so that the access network element is in any situation.
  • the SVRCC process is triggered on the S8HR terminal.
  • the mobility management network element may specifically send the indication information to the access network element in a message such as an Initial UE context setup/UE context modification/downlink NAS transport.
  • the mobility management network element sends indication information to an access network element.
  • the access network element receives the indication information of the mobility management network element.
  • the access network element prohibits triggering a single wireless voice call continuity SRVCC process to the terminal according to the indication information.
  • the access network element network element receives a bearer setup request sent by the mobility management network element, where the bearer setup request is used to request to establish a VOLTE service bearer for the terminal.
  • the access network element network element rejects the bearer setup request.
  • the access network element receives the VoLTE service bearer sent by the core network (generally the bearer)
  • the specific QCI 1, where QCI (QoS Class Identifier) is a scale value used to measure a specific packet forwarding behavior provided to the service data flow), and the access network element needs to determine the LTE where the terminal is located.
  • the specific uplink signal quality parameter includes at least one of an uplink signal strength of the terminal, an uplink signal to noise ratio of the terminal, and an uplink packet loss ratio of the terminal; and specific downlink signal quality parameters include the terminal. At least one of a downlink signal strength, a downlink signal to noise ratio of the terminal, and a downlink packet loss rate of the terminal.
  • the response message may also carry a specific cause value.
  • the cause value may be: Radio resources not available, Failure in the Radio Interface Procedure, or Not supported QCI value.
  • the cause value may also be a standard undefined cause value, which is not limited herein.
  • the IMS network sends a 380/503 message to the terminal in the terminal calling scenario, triggering the terminal to re-initiate the CSFB calling process; or
  • the IMS network sends a 380/503 message to the called domain selection device, triggering it to re-select the called domain to the CS domain, and initiates the CSFB called process to the terminal.
  • This ensures that when the terminal initiates a VoLTE call in the case where the LTE signal quality is not good (subsequently it is necessary to trigger the SRVCC process), the VoLTE call is rejected and the call is converted to CSFB, avoiding or reducing the subsequent need from the source.
  • the opportunity to trigger SRVCC avoids the dropped call experience caused by the network side not providing SRVCC function.
  • about 380/503 messages, 380 and 503 are specific session initials.
  • the Session Initiation Protocol (SIP) response message code, 380 represents the replacement service, and 503 indicates that the service is not provided.
  • SIP Session Initiation Protocol
  • the terminal sends an invite message to the IMS network device (P-CSCF) to request to initiate a VoLTE call procedure.
  • the P-CSCF establishes a calling VoLTE session for the terminal, and sends an invite message to the subsequent network node and the peer terminal.
  • the peer terminal may respond with a response, and the P-CSCF may receive a 183 response message, and the P-CSCF sends a response message to the calling terminal.
  • the P-CSCF Trigger Policy and the Charging Rules Function (PCRF) initiate an IP-CAN session session establishment to the EPS network device (PGW), as shown in Figure 4 for AAR, RAR, RAA, and AAA. Wait for four messages.
  • PCRF Policy and the Charging Rules Function
  • the bearer establishment reject message is transmitted to the P-CSCF through the mobility management network element. It contains specific cause values. The specific cause value can be set.
  • the P-CSCF After receiving the reject message with the specific cause value, the P-CSCF sends a 380/503 message to the terminal. And if the 183 message is received before, then the P-CSCF will send a cancel message to the subsequent network node to cancel the peer session.
  • the terminal After receiving the 380/503 message, the terminal will automatically initiate the CSFB call flow.
  • the called process is similar to the above-mentioned calling process, as shown in Figure 5, the called VoLTE to CSFB process, the process includes the following steps:
  • the IMS network device P-CSCF After receiving the invite message sent by other nodes of the IMS network, the IMS network device P-CSCF establishes a called VoLTE session for the called terminal, and sends an invite message to the called terminal.
  • the terminal After receiving the call request, the terminal replies with a 183 response message.
  • the P-CSCF triggers the IP-CAN session establishment process to the PCRF, which is the same as the calling process.
  • the P-CSCF After receiving the reject message, the P-CSCF sends a 380/503 message to the called domain selection device of the IMS network, and the called domain selection device re-triggers a CSFB called procedure for the terminal.
  • the terminal and EPS network perform the existing CSFB called process.
  • the terminal is prohibited.
  • the SRVCC function notifies the access network element, so that the access network element prohibits the SRVCC process from being triggered on the terminal, thereby avoiding the poor user experience brought by the SRVCC function to the user in the current S8HR roaming architecture;
  • the access network element can convert the volte call initiated by the UE to the CSFB call actively or passively under the necessary conditions, and try to avoid triggering the SRVCC on the UE and not supporting the SVRCC on the network side. Scenario, avoiding call failures and dropped calls.
  • the VoLTE call session triggered by the roaming terminal is used as the IMS core network carrying the HPLMN through the EPS network of the VPLMN.
  • the signaling and session content of the call are encrypted between the terminal and the IMS network, so the VPLMN cannot It is very difficult to legally monitor or monitor VoLTE calls initiated by the incoming S8HR terminal.
  • FIG. 6 is a schematic flowchart of still another method for roaming a voice according to an embodiment of the present invention, where the method includes the following steps:
  • the mobility management network element determines that the terminal is a terminal that roams into the visited public land mobile network VPLMN and the terminal is capable of using the long term evolution network based voice transmission VoLTE service in the VPLMN.
  • the mobility management network element determines that the terminal is a terminal that roams into the visited public land mobile network VPLMN and the terminal can use the long-term evolution network-based voice transmission VoLTE service in the VPLMN.
  • the terminal can use the long-term evolution network-based voice transmission VoLTE service in the VPLMN.
  • the mobility management network element may further determine the terminal.
  • the VoLTE service needs to be based on the S8HR communication architecture. For details, refer to step S203 in the embodiment shown in FIG. 3.
  • the mobility management network element determines that the VPLMN cannot perform lawful interception on a VoLTE session of the terminal.
  • step S302 includes:
  • the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the mobility management network element determines that the VPLMN does not deploy a lawful interception function for the S8HR roaming architecture. For example, the SGW and the access network element of the VPLMN may not be deployed to monitor the VoLTE session related signaling and data. The function to judge.
  • step S302 includes:
  • the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the MoLTE call signaling and/or session content is encrypted according to the terminal and the HPLMN, and the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal, including :
  • the mobility management network element receives first indication information sent by a network device of the HPLMN, where the first indication information is used to indicate that a VoLTE session for the terminal or all S8HR roaming terminals from the HPLMN is encrypted or Encryption is not turned off;
  • the mobility management network element determines that VoLTE call signaling and/or session content between the terminal and the HPLMN is encrypted
  • the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the voice management network element determines that the VOLTN call signaling and/or session content between the terminal and the HPLMN is encrypted, and the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the mobility management network element receives second indication information sent by the lawful interception execution device, where the second indication information is used to indicate VoLTE between the S8HR roaming terminal and the HPLMN for the terminal or from the HPLMN
  • the session is encrypted or encrypted is not closed;
  • the mobility management network element determines that VoLTE call signaling and/or session content between the terminal and the HPLMN is encrypted
  • the mobility management network element determines that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the lawful interception execution device may be an SGW of the VPLMN or an access network element.
  • the mobility management network element determines that the terminal needs to be legally monitored.
  • the mobility management network element acquires identity information of the terminal, and the identity information includes identification information, such as an International Mobile Subscriber Identification Number (IMSI) of the terminal, and an International Mobile Equipment Identity (International Mobile Equipment Identity, Referred to as IMEI).
  • the identity information of the terminal that requests the registration of the mobility management network element belongs to the prior art, and is not limited herein.
  • the mobility management network element reports the identity information of the terminal to the relevant lawful interception execution device (such as a monitoring gateway) or a lawful interception control device (such as a monitoring center, an administration function (ADMF), etc.), and legally monitors the execution/control device. After determining whether the device needs to be monitored according to the identity information of the terminal, the mobility management network element result is notified.
  • the lawful interception execution/control device actively sends the identity information of all objects that need to be monitored to the mobility management network element, and the mobility management network element saves the information.
  • the mobility management network element After obtaining the identity information of the terminal that is requested to be registered, the mobility management network element determines whether the identity information of the terminal is included in the information that needs to be monitored by the terminal, and if so, determines that the terminal needs Being monitored.
  • the above two methods do not limit the existence of a direct interface between the mobility management network element and the lawful interception execution/control device.
  • the mobility management network element can perform execution/control from the lawful interception via the intermediate network element.
  • the device gets the necessary information.
  • the bearer setup request sent by the core network gateway is received, the bearer setup request is used to request to establish a VoLTE service bearer for the terminal, and the mobility management network element rejects the bearer setup request.
  • the IMS network sends a 380/503 message to the terminal in the terminal call origination scenario, triggering the terminal to re-initiate the CSFB calling process, or in the terminal called scenario, the IMS network.
  • the 380/503 message will be sent to the called domain selection device, triggering it to re-select the called domain to the CS domain, and initiate the CSFB called process to the terminal.
  • step S304 is executed when the next VoLTE session is initiated, which is actually not contradictory to the embodiment of the present invention.
  • the mobility management network element determines that the terminal is a roaming terminal, and the VPLMN cannot perform lawful interception on the terminal's VoLTE session, and the mobility management network element determines that the terminal needs to be performed on the terminal.
  • the lawful interception the mobility management network element rejects the establishment of the VoLTE service bearer of the terminal, so that when the VPLMN cannot legally monitor the VoLTE call of the roaming terminal, the mobility management network element can treat the flooded terminal differently, for most A roaming terminal that needs to be legally monitored can provide normal VoLTE services, so that the VoLTE roaming solution can be commercialized as soon as possible.
  • the VPLMN converts its VoLTE call setup process into a CSFB call setup process, ensuring that the terminal can The CS domain is monitored using existing mechanisms while ensuring that it is not perceived by the terminal.
  • FIG. 7 is a schematic structural diagram of a mobility management network element according to an embodiment of the present disclosure, where the mobility management network element 1000 includes:
  • the determining unit 11 is configured to determine that the terminal is a terminal supporting the VoLTE service roaming into the VPLMN.
  • the terminal in this embodiment is a roaming user roaming into the VPLMN from the HPLMN.
  • the roaming terminal initiates an EPS registration at the VPLMN and may also need to initiate an IMS registration request message to the IMS network of its HPLMN. Therefore, the registration request message includes an EPS registration request message or an IMS registration request message.
  • the determining unit 11 may determine that the terminal is roaming into the terminal of the visited public land mobile network VPLMN and the terminal is capable of using the long term evolution network based voice transmission VoLTE service in the VPLMN.
  • the mobility management network element is located in the VPLMN and may be an MME.
  • the prohibition unit 12 is configured to disable the SRVCC function of the terminal.
  • the access network element triggers the SRVCC handover procedure to the VoLTE session of the terminal.
  • the CS session of the traditional 2G/3G session is continued to ensure that the voice call of the user is not interrupted.
  • the standard requires that the voice interruption delay caused by the entire handover process cannot exceed 300 ms.
  • the SRVCC handover of the terminal may be possible in the roaming situation. The requirements of the standard are not met.
  • the terminal prohibits the SRVCC function of the terminal, thereby preventing the access network element from triggering the SRVCC handover procedure of the terminal.
  • the mobility management network element After determining that the SRVCC function of the terminal is prohibited, the mobility management network element sends the indication information to the network element of the access network, where the indication information is used to indicate that the mobility management network element does not support the SRVCC function, and/or is used to notify the
  • the access network element terminal is a roaming terminal and the VoLTE service needs to be based on an S8HR communication architecture.
  • the VoLTE service based on the S8HR communication architecture in the prior art, no matter how the operation is performed, the SRVCC handover cannot meet the standard delay requirement.
  • the mobility management network element when the mobility management network element determines that the terminal is a roaming terminal supporting the VoLTE service, the SRVCC function of the terminal is prohibited, and the access network element is notified, thereby The access network element prohibits the SRVCC process from being triggered on the terminal.
  • FIG. 8 is a schematic structural diagram of another mobility management network element according to an embodiment of the present invention.
  • the mobility management network element 2000 includes:
  • the receiving unit 21 is configured to receive a registration request message of the terminal.
  • the roaming terminal sends an EPS registration request when the EPS network of the VPLMN initiates the registration process.
  • the tracking/tracking area update request message is sent to the mobility management network element of the VPLMN.
  • the roaming terminal may also need to initiate an IMS registration request message to the IMS network of its HPLMN. Therefore, the registration request message includes an EPS registration request message or an IMS registration request message.
  • the determining unit 22 is configured to determine that the terminal is a terminal that roams into the visited public land mobile network VPLMN and the terminal is capable of using the Long Term Evolution network based voice transmission VoLTE service in the VPLMN.
  • the mobility management network element may determine that the terminal is a terminal that supports the VoLTE service roaming into the VPLMN.
  • the determining unit 22 is further configured to determine that the VoLTE service of the terminal needs to be based on an S8 interface home route S8HR communication architecture.
  • the roaming terminal supporting the VoLTE service includes an S8HR roaming terminal
  • the S8HR roaming terminal refers to a roaming terminal that needs to adopt the S8HR communication mechanism for VoLTE.
  • the determining unit 22 is specifically configured to:
  • configuration information corresponding to the HPLNM identification information includes roaming agreement information between the visited public land mobile network VPLMN and the HPLMN corresponding to the HPLMN identifier;
  • the mobility management network element may determine according to the configuration information. Specifically, when the mobility management network element receives the registration request message of the terminal, the HPLMN ID of the terminal is identified, and the mobility management network element queries the internal configuration information by using the HPLMN ID. If the S8HR roaming protocol is configured between the VPLMN and the HPLMN, The mobility management network element determines that the terminal is an S8HR roaming terminal.
  • the VPLMN when the VPLMN is configured to provide the S8HR VoLTE roaming service from the other HPLMN roaming terminals, the VPLMN does not need to acquire the HPLMN ID of the terminal, and directly determines, according to the configuration information, that the terminal is an S8HR roaming terminal. .
  • the determining unit 22 is specifically configured to:
  • the mobility management network element determines, according to the subscription data of the terminal, that the subscription data of the terminal may or may not contain some specific indication information, and the mobility management network element may determine that the terminal is an S8HR roaming terminal.
  • the subscription data of the terminal will be directed to the IMS access point of the VPLMN.
  • the name setting of a visited address is allowed to identify a flag, which is used to indicate that the terminal can perform a VoLTE call in the VPLMN using the LBO roaming architecture.
  • the mobility management network element determines that the subscription data of the terminal is for the VPLMN.
  • the IMS APN does not contain the VAA flag, and it can be judged that the terminal is an S8HR roaming terminal.
  • Another case is to include specific indication information, that is, the embodiment of the present invention enhances the subscription data of the terminal, and adds indication information about whether the VPLMN uses the S8HR roaming protocol. If the mobility management network element determines that the subscription data of the terminal includes indication information for using the S8HR roaming protocol for the VPLMN, the mobility management network element may determine that the terminal is an S8HR roaming terminal.
  • the specific STN-SR number may be a number in a specific coding manner, such as an all-one number.
  • the IMS network device such as P-CSCF/ATCF, etc.
  • the LM registration process of the HPLMN IMS network device in the terminal the terminal initiates an IMS registration request message in the VPLMN, the registration request
  • the message will be transmitted to the HPLMN's IMS network.
  • the terminal is determined to be an S8HR roaming out user (specifically, it is determined that the terminal has roamed out of the HPLMN, and the S8HR roaming architecture needs to be used for VoLTE between the roaming VPLMN and the HPLMN. Service), the IMS network device allocates a specific STN-SR to the terminal, and the specific STN-SR is transmitted to the HSS and finally transmitted to the mobility management network element of the VPLMN.
  • the mobility management network element can determine at this time that the terminal is an S8HR roaming terminal according to a specific STN-SR (generally received an ordinary STN-SR).
  • the HPLMN may pre-set the STN-SR number of all the contracted terminals to a specific STN-SR in the HSS, and when the terminal initiates registration with the HPLMN IMS network, the HPLMN IMS network device determines the terminal. If the non-S8HR roams out the user, the IMS network device allocates a new non-specific STN-SR to the terminal. Conversely, if the HPLMN IMS network device determines that the terminal is an S8HR roaming out user, the STN-SR of the terminal is not modified. As in the prior art, the STN-SR corresponding to the terminal is transmitted to the IMS registration process.
  • the mobility management network element of the VPLMN the mobility management network element can determine that the terminal is an S8HR roaming terminal according to a specific STN-SR.
  • the mobility management network element determines that the VPLMN supports the SRVCC function for the non-roaming terminal and/or the roaming terminal that does not adopt the S8HR communication architecture.
  • the prohibiting unit 23 is configured to prohibit the single wireless voice call continuity SRVCC function of the terminal.
  • the mobility management network element 2000 further includes: a sending unit 24;
  • the sending unit 24 is configured to send the first indication information to the network element of the access network, where the first indication information is used to indicate that the mobility management network element does not support the SRVCC function for the terminal.
  • the mobility management network element sets the SRVCC operation feasibility value to a negative value; the mobility management network element sends the SRVCC operation feasibility value to the access network element, and the SRVCC operation feasibility value And is used to indicate that the access network element does not support the SRVCC function for the terminal.
  • the mobility management network element sets the SRVCC operation possible value to a negative value (such as false or acceptable), and sends the updated value to the access network.
  • the element informs the access network element that the SRVCC operation is not supported on the terminal. It should be noted that the value may also be a negative value, and the value need not be updated when setting. According to the prior art, after receiving the negative SRVCC operation possible value, the access network element does not trigger the SRVCC process for the terminal under any conditions.
  • the mobility management network element may specifically have a negative value of SRVCC in a message such as a user initial context setup request/user context modification request (downlink NAS transport) or a downlink non-access layer transport (downlink NAS transport).
  • the operation possible value is sent to the access network element.
  • the sending unit 24 is configured to send second indication information to the access network element, where the second indication information is used to notify the access network element that the terminal is a roaming terminal, and the VoLTE service needs to be based on S8HR communication.
  • the architecture is such that the access network element prohibits triggering the SRVCC process on the terminal.
  • the mobility management network element sends indication information to the access network network element, where the indication information is used to notify the access network element that the terminal is an S8HR roaming terminal, so that the access network element is in any In this case, it is forbidden to trigger the SVRCC process on the S8HR terminal.
  • the mobility management network element may specifically send the indication information to the access network element in a message such as an Initial UE context setup/UE context modification/downlink NAS transport.
  • the prohibiting unit 23 is specifically configured to:
  • the handover request message is used to trigger the SRVCC handover procedure, and reject the handover request message.
  • prohibition unit 23 can combine the above methods.
  • the sending unit 24 is further configured to send indication information to the access network element.
  • a mobility management network element is configured to disable the SRVCC function of the terminal when the mobility management network element determines that the terminal is a roaming terminal supporting the VoLTE service and the VoLTE service needs to be based on the S8HR communication architecture. And notifying the network element of the access network, so that the access network element prohibits the SRVCC process from being triggered to the terminal, thereby solving the interruption delay requirement of the SRVCC in the current S8HR roaming architecture; and receiving the mobility management on the access network element When the bearer setup request sent by the network element is measured, the LTE network signal quality of the terminal is measured.
  • the access network element rejects the bearer setup message, thereby ensuring that the terminal is in the LTE signal quality.
  • the VoLTE call is rejected and the call is converted to CSFB.
  • the subsequent need to trigger the SRVCC is avoided or reduced from the source, and the network side does not provide the SRVCC function.
  • FIG. 9 is a schematic structural diagram of an access network element according to an embodiment of the present disclosure, where the access network element 3000 includes:
  • the receiving unit 31 is configured to receive indication information of the transmission of the mobility management network element.
  • the prohibiting unit 32 is configured to prohibit triggering the SRVCC process on the terminal according to the indication information.
  • the access network element After receiving the indication information sent by the mobility management network element, the access network element prohibits the SRVCC process from being triggered to the terminal, thereby preventing the access network element from triggering the SRVCC handover process of the terminal.
  • An access network element when the mobility management network element determines that the terminal is a roaming terminal that supports the VoLTE service, prohibits the SRVCC function of the terminal, and notifies the access network element, thereby The access network element prohibits the SRVCC process from being triggered on the terminal.
  • FIG. 10 is a schematic structural diagram of another access network element according to an embodiment of the present disclosure, where the access network element 4000 includes:
  • the receiving unit 41 is configured to receive indication information of the transmission of the mobility management network element.
  • the prohibiting unit 42 is configured to, according to the indication information, prohibit the triggering of a single wireless voice call continuity SRVCC procedure for the terminal.
  • the receiving unit 41 is further configured to receive a bearer setup request sent by the mobility management network element, where the bearer setup request is used to request to establish a VOLTE service bearer for the terminal.
  • the rejecting unit 43 is configured to reject the bearer setup request if it is determined that the LTE network signal quality of the terminal is lower than a set value.
  • the access network element needs to determine the uplink signal quality parameter and/or the downlink signal quality parameter of the LTE network signal where the terminal is located.
  • the specific uplink signal quality parameter includes at least one of an uplink signal strength of the terminal, an uplink signal to noise ratio of the terminal, and an uplink packet loss ratio of the terminal; and specific downlink signal quality parameters include the terminal. At least one of a downlink signal strength, a downlink signal to noise ratio of the terminal, and a downlink packet loss rate of the terminal.
  • the response message may also carry a specific cause value.
  • the cause value may be: Radio resources not available, Failure in the Radio Interface Procedure, or Not supported QCI value.
  • the cause value may also be a standard undefined cause value, which is not limited herein.
  • the IMS network sends a 380/503 message to the terminal in the terminal calling scenario, triggering the terminal to re-initiate the CSFB calling process; or
  • the IMS network sends a 380/503 message to the called domain selection device, triggering it to re-select the called domain to the CS domain, and initiates the CSFB called process to the terminal.
  • This ensures that when the terminal initiates a VoLTE call in the case where the LTE signal quality is not good (subsequently it is necessary to trigger the SRVCC process), the VoLTE call is rejected and the call is converted to CSFB, avoiding or reducing the subsequent need from the source.
  • 380 and 503 are specific Session Initiation Protocol (SIP) response message codes, 380 indicates replacement service, and 503 indicates that the service is not provided.
  • SIP Session Initiation Protocol
  • the mobility management network element of the visited network determines that the terminal roams into the visited network and can access the terminal of the VoLTE service in the visited network and the The VoLTE service needs to be based on the S8HR communication architecture, prohibiting the SRVCC function of the terminal, and notifying the access network element, so that the access network element prohibits the SRVCC process from being triggered to the terminal, thereby avoiding the SRVCC function in the current S8HR roaming architecture.
  • the access network element can convert the volte call initiated by the UE actively or passively into a CSFB call under the necessary conditions, Avoid the scenario where the SRVCC is triggered to the UE and the SVRCC is not supported on the network side to avoid call failure and dropped calls.
  • FIG. 11 is a schematic structural diagram of still another mobility management network element according to an embodiment of the present invention.
  • the mobility management network element 5000 includes:
  • the determining unit 51 is configured to determine that the terminal is a terminal roaming into the visited public land mobile network VPLMN and the terminal is capable of using the Long Term Evolution network based voice transmission VoLTE service in the VPLMN.
  • the determining unit 51 may further be configured to determine that the VoLTE service of the terminal needs to be based on an S8HR communication architecture.
  • the determining unit 51 is specifically configured to:
  • configuration information corresponding to the HPLNM identification information includes roaming agreement information between the visited public land mobile network VPLMN and the HPLMN corresponding to the HPLMN identifier;
  • the S8HR roaming protocol information exists between the HPLMN and the VPLMN, determining the long-term evolution-based voice transmission VoLTE service of the terminal needs to be based on the S8HR communication architecture.
  • the determining unit 51 is specifically configured to:
  • the determining unit 51 is further configured to determine that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the determining unit 51 is specifically configured to:
  • the VPLMN does not deploy the lawful interception function for the S8HR roaming architecture, it is determined that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the mobility management network element determines that the VPLMN is not directed to the S8HR roaming architecture department.
  • the lawful interception function can be determined by, for example, the function of monitoring the VoLTE session-related signaling and data on the SGW of the VPLMN and the access network element.
  • the determining unit 51 is specifically configured to:
  • the mobility management network element further includes a receiving unit (not shown in the figure)
  • the receiving unit is configured to receive first indication information sent by a network device of the HPLMN, where the first indication information is used to indicate encryption or encryption of a VoLTE session for the terminal or all S8HR roaming terminals from the HPLMN Not closed;
  • the determining unit is specifically configured to determine that VoLTE call signaling and/or session content between the terminal and the HPLMN is encrypted;
  • the determining unit is further configured to determine that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the receiving unit is further configured to receive second indication information that is sent by the legal intercepting execution device, where the second indication information is used to indicate that the SLMHR roaming terminal and the HPLMN are all for the terminal or from the HPLMN. Encrypted or encrypted VoLTE session is not closed;
  • the determining unit is specifically configured to determine that VoLTE call signaling and/or session content between the terminal and the HPLMN is encrypted;
  • the determining unit is further configured to determine that the VPLMN cannot perform lawful interception on the VoLTE session of the terminal.
  • the lawful interception execution device may be an SGW of the VPLMN or an access network element.
  • the determining unit 51 is further configured to determine that the terminal needs to be legally monitored.
  • the rejecting unit 52 is configured to: if receiving a bearer setup request sent by the core network gateway, where the bearer setup request is used to request to establish a VoLTE service bearer for the terminal, reject the bearer setup request.
  • the IMS network After the reject message is transmitted to the IMS network, the IMS network sends a 380/503 message to the terminal, triggering the terminal to re-initiate the CSFB calling process, or the IMS network sends a 380/503 message to the called domain selecting device. Trigger it to re-select the called domain to the CS domain, and initiate CSFB to the terminal. Call the process.
  • the mobility management network element when the mobility management network element determines that the terminal is a roaming user, and the VPLMN cannot perform lawful interception on the VoLTE session of the terminal, the mobility management network element determines that the The terminal performs lawful interception, and the mobility management network element rejects the VoLTE service bearer setup message, so that when the VPLMN cannot perform lawful interception on the terminal's VoLTE call, the mobility management network element can treat the flooded user differently, and most need not The terminal that is legally monitored can provide normal VoLTE services, so that the VoLTE roaming solution can be commercialized as soon as possible.
  • the VPLMN converts its initiated VoLTE call into a CSFB call, ensuring that the terminal can utilize the existing in the CS domain. The mechanism is monitored while ensuring that it is not perceived by the terminal.
  • FIG. 12 is a schematic structural diagram of another mobility management network element, which is used to implement the voice roaming function.
  • the mobility management network element 6000 includes a processor 61 and a memory 62.
  • a transmitter 63 (shown in phantom in the figure) may also be included, wherein the processor 61, the memory 62 and the transmitter 63 are connected to each other by a bus 64.
  • the memory 62 stores a computer program, and the processor 61 executes the stored computer program to cause the mobility management network element to implement the above-described method of voice roaming.
  • the processor 61 is configured to determine that the terminal is a terminal that roams into the visited public land mobile network VPLMN and the terminal is capable of using the Long Term Evolution network-based voice transmission VoLTE service in the VPLMN;
  • the processor 61 is further configured to disable the single wireless voice call continuity SRVCC function of the terminal.
  • the processor 61 is further configured to: determine that the VoLTE service of the terminal needs to be based on an S8 interface home route S8HR communication architecture.
  • the processor 61 is specifically configured to acquire the home public land mobile network HPLMN identification information of the terminal;
  • the processor 61 is further configured to search for preset configuration information corresponding to the HPLNM identification information, where the configuration information includes a roaming agreement between the visited public land mobile network VPLMN and the HPLMN corresponding to the HPLMN identifier. information;
  • the processor 61 is further configured to determine that the VoLTE service of the terminal needs to be based on the S8HR communication architecture.
  • the processor 61 is specifically configured to acquire subscription data of the terminal.
  • the processor 61 is further configured to determine, according to the subscription data, that the VoLTE service of the terminal needs to be based on an S8HR communication architecture.
  • the sender 63 is configured to send the first indication information to the network element of the access network, where the first indication information is used to indicate that the mobility management network element does not support the SRVCC function for the terminal.
  • the processor 61 is specifically configured to set an SRVCC operation feasibility value to a negative value
  • the transmitter 63 is specifically configured to send the SRVCC operational feasibility value to the access network element, where the SRVCC operational feasibility value is used to indicate that the mobility management network element does not support the SRVCC function for the terminal.
  • the transmitter 63 is configured to send, to the access network element, second indication information, where the second indication information is used to notify the access network element that the terminal is a roaming terminal, and
  • the VoLTE service needs to be based on the S8HR communication architecture, so that the access network element prohibits the SRVCC process from being triggered to the terminal.
  • the processor 61 is specifically configured to: when receiving a handover request message for the terminal sent by an access network element, the handover request message is used to trigger an SRVCC handover process, and reject the The handover request message.
  • the processor 61 is further configured to determine that the VPLMN supports the SRVCC function for the non-roaming terminal and/or the roaming terminal that does not adopt the S8HR communication architecture.
  • the mobility management network element when the mobility management network element determines that the terminal is a roaming terminal supporting the VoLTE service, the SRVCC function of the terminal is prohibited, and the access network element is notified, thereby The access network element prohibits the SRVCC process from being triggered on the terminal.
  • FIG. 13 is a schematic structural diagram of another access network element, which is used to implement the voice roaming function.
  • the access network element 7000 includes a receiver 71 and a processor 72. And a memory 73 in which the receiver 71, the processor 72 and the memory 73 are connected to each other by a bus 74.
  • the memory 73 stores a computer program, and the processor 72 executes the stored computer program to cause the access network element to implement the above method of voice roaming.
  • the receiver 71 is configured to receive the indication information of the transmission of the mobility management network element, where the indication information is used to indicate that the mobility management network element does not support the continuity of the single wireless voice call to the terminal.
  • the SRVCC function is used to notify the access network element terminal that is a roaming terminal and the VoLTE service needs to be based on an S8HR communication architecture;
  • the processor 72 is configured to, according to the indication information, prohibit a single wireless voice call continuity SRVCC process from being triggered to the terminal;
  • the receiver 71 is further configured to receive a bearer setup request sent by the mobility management network element, where the bearer setup request is used to request to establish a VOLTE service bearer for the terminal;
  • the processor 72 is further configured to reject the bearer setup request.
  • the mobility management network element determines that the terminal roams into the terminal of the visited public land mobile network VPLMN and the terminal can use the long term evolution network based on the VPLMN.
  • the SRVCC function of the terminal is prohibited, and the access network element is notified, so that the access network element prohibits the SRVCC process from being triggered to the terminal; and the access network element receives the mobility management network.
  • the bearer setup request sent by the element is measured, the LTE network signal quality of the terminal is measured.
  • the access network element rejects the bearer setup message, thereby ensuring that the terminal is not in the LTE signal quality.
  • the VoLTE call is rejected and the call is converted to CSFB, which avoids or reduces the need to trigger SRVCC from the source, and avoids the dropped call caused by the network side not providing the SRVCC function.
  • FIG. 14 is a schematic structural diagram of another mobility management network element according to an embodiment of the present invention, for implementing the voice roaming function.
  • the mobility management network element 8000 includes a processor 81 and a memory 82.
  • the processor 81 and the memory 82 are respectively connected to the bus 83.
  • the memory 82 stores a computer program, and the processor 81 executes the stored computer program to cause the mobility management network element to implement the above-described method of voice roaming.
  • the processor 81 is configured to determine that the terminal is a terminal that roams into the visited public land mobile network VPLMN and the terminal is capable of using the long term evolution network based voice transmission VoLTE service in the VPLMN;
  • the processor 81 is further configured to: determine that the VPLMN cannot perform lawful interception on a VoLTE session of the terminal;
  • the processor 81 is further configured to determine that the terminal needs to be legally monitored
  • the bearer setup request sent by the core network gateway is received, the bearer setup request is used to request to establish a VoLTE service bearer for the terminal, and the processor 81 is further configured to reject the bearer setup request.
  • the mobility management network element when the mobility management network element determines that the terminal is an S8HR roaming terminal, and the VPLMN cannot perform lawful interception on the terminal's VoLTE session, and the mobility management network element determines that it needs to The terminal performs lawful interception, and the mobility management network element rejects the VoLTE service bearer setup message, so that when the VPLMN cannot perform lawful interception on the VoLTE call of the S8HR roaming terminal, the mobility management network element can treat the S8HR flooding user differently. Most S8HR terminals that do not need to be legally monitored can provide normal VoLTE services, so that the S8HR VoLTE roaming solution can be commercialized as soon as possible.
  • the VPLMN converts its initiated VoLTE calls into CSFB calls, guaranteeing the terminal. It can be monitored in the CS domain using existing mechanisms while ensuring that it is not perceived by the terminal.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • the computer readable medium may include a random access memory (RAM), a read-only memory (ROM), and an electrically erasable programmable read-only memory (Electrically Erasable Programmable).
  • EEPROM Electrically Error Read-Only Memory
  • CD-ROM Compact Disc Read-Only Memory
  • Any connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, Then coaxial cable, fiber optic cable, twisted pair Wire, DSL or wireless technologies such as infrared, wireless and microwave are included in the fixing of the associated medium.
  • DSL Digital Subscriber Line
  • a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Technology Law (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

一种语音漫游方法，移动性管理网元及接入网网元。在移动性管理网元确定终端为漫游终端且在漫游网络支持VoLTE业务的的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程。

Description

一种语音漫游方法，移动性管理网元及接入网网元 技术领域
本发明涉及通信技术领域，尤其涉及一种语音漫游方法，移动性管理网元及接入网网元。
背景技术
基于长期演进的语音传输(Voice over LTE，简称VoLTE)是基于互联网协议多媒体子系统(IP Multimedia Subsystem，简称IMS)的语音业务。IMS由于支持多种接入和丰富的多媒体业务，成为全IP时代的核心网标准架构。VoLTE是一种IP数据传输技术，无需第二代移动通信技术/第三代移动通信技术(2nd Generation/3rd Generation，简称2G/3G)网，全部业务承载于第四代移动通信技术(4th Generation，简称4G)网络上，可实现数据与语音业务在同一网络下的统一。S8口归属路由(Home Routed over S8interface，简称S8HR)是VoLTE漫游的一种方案。如图1，为VoLTE S8HR架构示意图，当S8HR终端发起IMS注册时，受访的公用陆地移动网(Visited Public Land Mobile Network，简称VPLMN)为终端选择归属公共陆地移动网(Home Public Land Mobile Netwrok，简称HPLMN)中的公共数据网网关(Public Data Network Gateway，简称PGW)建立连接，将注册信息发送给HPLMN中的IMS设备进行注册。
然而，S8HR漫游架构下单一无线语音呼叫连续性(Single Radio Voice Call Continuity，简称SRVCC)是个难以解决的技术难题。所谓SRVCC是指原本正在进行VoLTE业务的终端，如果进入长期演进(Long Term Evolution，简称LTE)网络覆盖不好的区域，所述区域LTE信号质量不足以继续支撑用户的VOLTE会话要求，则网络侧触发SRVCC切换流程将VoLTE会话切换至传统2G/3G的电路交换(Circuit Switching，简称CS)会话继续进行，保证用户的语音通话不被中断，要求整个切换过程所带来的语音中断时延不能超过300ms。然而在S8HR漫游架构下，SRVCC切换并不能满足此要求。
发明内容
本发明实施例提供了一种语音漫游方法，移动性管理网元及接入网网元，以解决目前S8HR漫游架构下不能满足SRVCC的中断时延要求。
第一方面，提供了一种语音漫游方法，包括：
移动性管理网元确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务；
所述移动性管理网元禁止所述终端的单一无线语音呼叫连续性SRVCC功能。
在移动性管理网元确定终端为漫游终端且在漫游网络支持VoLTE业务的漫游终端的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程。
结合第一方面，在第一种可能的实现方式中，所述方法还包括：
所述移动性管理网元确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
结合第一方面的第一种可能的实现方式，在第二种可能的实现方式中，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构，包括：
所述移动性管理网元获取所述终端的归属公共陆地移动网HPLMN标识信息；
所述移动性管理网元查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构。
结合第一方面的第一种可能的实现方式，在第三种可能的实现方式中，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构，包括：
所述移动性管理网元获取所述终端的签约数据；
所述移动性管理网元根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种可能的实现方式或第一方面的第三种可能的实现方式，在第四种可能的实现方 式中，所述移动性管理网元禁止所述终端的SRVCC功能，包括：
所述移动性管理网元向接入网网元发送第一指示信息，所述第一指示信息用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
结合第一方面的第四种可能的实现方式，在第五种可能的实现方式中，所述移动性管理网元向接入网网元发送第一指示信息，包括：
所述移动性管理网元设置SRVCC操作可行性值为否定值；
所述移动性管理网元将所述SRVCC操作可行性值发送给接入网网元，所述SRVCC操作可行性值用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种可能的实现方式或第一方面的第三种可能的实现方式，在第六种可能的实现方式中，所述移动性管理网元禁止所述终端的SRVCC功能，包括：
所述移动性管理网元向接入网网元发送第二指示信息，所述第二指示信息用于告知所述接入网网元所述终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构，以使所述接入网网元禁止对所述终端触发SRVCC流程。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种可能的实现方式或第一方面的第三种可能的实现方式，在第七种可能的实现方式中，所述移动性管理网元禁止所述终端的单一无线语音呼叫连续性SRVCC功能，包括：
当所述移动性管理网元接收到接入网网元发送的针对所述终端的切换请求消息时，所述切换请求消息用于触发SRVCC切换流程，所述移动性管理网元拒绝所述切换请求消息。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种可能的实现方式或第一方面的第三种可能的实现方式或第一方面的第四种可能的实现方式或第一方面的第五种可能的实现方式或第一方面的第六种可能的实现方式或第一方面的第七种可能的实现方式，在第八种可能的实现方式中，所述方法还包括：
所述移动性管理网元确定所述VPLMN对于非漫游终端和/或非采用S8HR通信架构的漫游终端支持SRVCC功能。
第二方面，还提供了一种语音漫游方法，包括：
接入网网元接收移动性管理网元的发送的指示信息，所述指示信息用于指示所述移动性管理网元对终端不支持单一无线语音呼叫连续性SRVCC功能，或用于告知所述接入网网元终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构；
所述接入网网元根据所述指示信息，禁止对所述终端触发单一无线语音呼叫连续性SRVCC流程。
在移动性管理网元确定终端为漫游终端且在漫游网络支持VoLTE业务的漫游终端的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程。
结合第二方面，在第一种可能的实现方式中，所述方法还包括：
所述接入网元网元接收所述移动性管理网元发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载；
若确定所述终端的LTE网络信号质量低于设定值，则所述接入网元网元拒绝所述承载建立请求。
在网络侧对漫游终端不提供SRVCC功能的情况下，接入网网元可以在必要的条件下将UE主动或被动发起的volte呼叫转化为CSFB呼叫，尽量避免需要对UE触发SRVCC而网络侧又不支持SVRCC的场景，避免带来的呼叫失败和掉话问题。
第三方面，提供了一种语音漫游方法，包括：
移动性管理网元确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务；
所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听；
所述移动性管理网元确定需要对所述终端进行合法监听；
若收到核心网网关发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载，则所述移动性管理网元拒绝所述承载建立请求。
在移动性管理网元确定终端为漫游终端，且VPLMN无法对终端的VoLTE 会话进行合法监听时，且移动性管理网元确定需要对该终端进行合法监听，移动性管理网元拒绝该终端的VoLTE业务承载建立，从而在VPLMN无法对漫游终端的VoLTE呼叫进行合法监听的情况下，移动性管理网元可以区别对待漫入终端，对于大多数不需要被合法监听的漫游终端可提供正常的VoLTE业务，使得VoLTE漫游方案可以尽快商用，而对于少数需要被监听的漫游终端，VPLMN将其VoLTE呼叫建立过程转化为CSFB呼叫建立过程，保证终端可以在CS域利用现有机制被监听，同时保证不被终端感知。
结合第三方面，在第一种可能的实现方式中，所述方法还包括：
所述移动性管理网元确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
结合第三方面的第一种可能的实现方式，在第二种可能的实现方式中，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构，包括：
所述移动性管理网元获取所述终端的归属公共陆地移动网HPLMN标识信息；
所述移动性管理网元查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，所述移动性管理网元确定所述终端的基于长期演进的语音传输VoLTE业务需要基于S8HR通信架构。
结合第三方面的第一种可能的实现方式，在第三种可能的实现方式中，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构，包括：
所述移动性管理网元获取所述终端的签约数据；
所述移动性管理网元根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
结合第三方面或结合第三方面的第一种可能的实现方式或结合第三方面的第二种可能的实现方式结合第三方面的第三种可能的实现方式，在第四种可能的实现方式中，所述移动性管理网元确定所述VPLMN无法对所述终端的 VoLTE会话进行合法监听，包括：
根据所述VPLMN未针对S8HR通信架构部署合法监听功能，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
结合第三方面或结合第三方面的第一种可能的实现方式或结合第三方面的第二种可能的实现方式结合第三方面的第三种可能的实现方式，在第五种可能的实现方式中，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听，包括：
根据所述终端和归属公共陆地移动网HPLMN之间的VoLTE呼叫信令和/或会话内容被加密，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
结合第三方面的第五种可能的实现方式，在第六种可能的实现方式中，所述根据所述终端和HPLMN之间的VoLTE呼叫信令和/或会话内容被加密，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听，包括：
所述移动性管理网元接收所述HPLMN的网络设备发送的第一指示信息，所述第一指示信息用于指示针对所述终端或来自所述HPLMN的所有S8HR漫游终端的VoLTE会话的被加密或者加密未关闭；
所述移动性管理网元确定所述终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
结合第三方面的第五种可能的实现方式，在第七种可能的实现方式中，所述根据所述终端和HPLMN之间的VoLTE呼叫信令和/或会话内容被加密，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听，包括：
所述移动性管理网元接收合法监听执行设备发送的第二指示信息，所述第二指示信息用于指示针对所述终端VoLTE会话的被加密或者加密未关闭；
所述移动性管理网元确定所述终端或来自所述HPLMN的所有S8HR漫游终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进 行合法监听。
第四方面及第五方面还提供了一种移动性管理网元，该移动性管理网元具有实现上述方法中移动性管理网元行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
第四方面，提供了一种移动性管理网元，包括：处理器；其中，
所述处理器，用于确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务；
所述处理器还用于禁止所述终端的单一无线语音呼叫连续性SRVCC功能。
结合第四方面，在第一种可能的实现方式中，所述处理器还用于确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
结合第四方面的第一种可能的实现方式，在第二种可能的实现方式中：
所述处理器具体用于获取所述终端的归属公共陆地移动网HPLMN标识信息；
所述处理器还具体用于查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，所述处理器还具体用于确定所述终端的VoLTE业务需要基于S8HR通信架构。
结合第四方面的第一种可能的实现方式，在第三种可能的实现方式中：
所述处理器具体用于获取所述终端的签约数据；
所述处理器还具体用于根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
结合第四方面或第四方面的第一种可能的实现方式或第四方面的第二种可能的实现方式或第四方面的第三种可能的实现方式，在第四种可能的实现方式中，所述移动性管理网元还包括发送器；
所述发送器，用于向接入网网元发送第一指示信息，所述第一指示信息用 于指示所述移动性管理网元对所述终端不支持SRVCC功能。
结合第四方面的第四种可能的实现方式，在第五种可能的实现方式中：
所述处理器具体用于设置SRVCC操作可行性值为否定值；
所述发送器具体用于将所述SRVCC操作可行性值发送给接入网网元，所述SRVCC操作可行性值用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
结合第四方面或第四方面的第一种可能的实现方式或第四方面的第二种可能的实现方式或第四方面的第三种可能的实现方式，在第六种可能的实现方式中，所述移动性管理网元还包括：发送器；
所述发送器，用于向接入网网元发送第二指示信息，所述第二指示信息用于告知所述接入网网元所述终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构，以使所述接入网网元禁止对所述终端触发SRVCC流程。
结合第四方面或第四方面的第一种可能的实现方式或第四方面的第二种可能的实现方式或第四方面的第三种可能的实现方式，在第七种可能的实现方式中：
当接收到接入网网元发送的针对所述终端的切换请求消息时，所述切换请求消息用于触发SRVCC切换流程，所述处理器截图用于拒绝所述切换请求消息。
结合第四方面或第四方面的第一种可能的实现方式或第四方面的第二种可能的实现方式或第四方面的第三种可能的实现方式或第四方面的第四种可能的实现方式或第四方面的第五种可能的实现方式或第四方面的第六种可能的实现方式或第四方面的第七种可能的实现方式，在第八种可能的实现方式中：
所述处理器还用于确定所述VPLMN对于非漫游终端和/或非采用S8HR通信架构的漫游终端支持SRVCC功能。
第五方面，提供了一种移动性管理网元，包括：
确定单元，用于确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务；
禁止单元，用于禁止所述终端的单一无线语音呼叫连续性SRVCC功能。
结合第五方面，在第一种可能的实现方式中，所述确定单元还用于：确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
结合第五方面的第一种可能的实现方式，在第二种可能的实现方式中，所述确定单元具体用于：
获取所述终端的归属公共陆地移动网HPLMN标识信息；
查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，确定所述终端的VoLTE业务需要基于S8HR通信架构。
结合第五方面的第一种可能的实现方式，在第三种可能的实现方式中，所述确定单元具体用于：
获取所述终端的签约数据；
根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
结合第五方面或第五方面的第一种可能的实现方式或第五方面的第二种可能的实现方式或第五方面的第三种可能的实现方式，在第四种可能的实现方式中，所述移动性管理网元还包括：
发送单元，用于向接入网网元发送第一指示信息，所述第一指示信息用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
结合第五方面的第四种可能的实现方式，在第五种可能的实现方式中，所述移动性管理网元还包括：
设置单元，用于设置SRVCC操作可行性值为否定值；
所述发送单元具体用于将所述SRVCC操作可行性值发送给接入网网元，所述SRVCC操作可行性值用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
结合第五方面或第五方面的第一种可能的实现方式或第五方面的第二种可能的实现方式或第五方面的第三种可能的实现方式，在第六种可能的实现方式中，所述移动性管理网元还包括：
发送单元，用于向接入网网元发送第二指示信息，所述第二指示信息用于 告知所述接入网网元所述终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构，以使所述接入网网元禁止对所述终端触发SRVCC流程。
结合第五方面或第五方面的第一种可能的实现方式或第五方面的第二种可能的实现方式或第五方面的第三种可能的实现方式，在第七种可能的实现方式中，所述禁止单元具体用于：
当接收到接入网网元发送的针对所述终端的切换请求消息时，所述切换请求消息用于触发SRVCC切换流程，拒绝所述切换请求消息。
结合第五方面或第五方面的第一种可能的实现方式或第五方面的第二种可能的实现方式或第五方面的第三种可能的实现方式或第五方面的第四种可能的实现方式或第五方面的第五种可能的实现方式或第五方面的第六种可能的实现方式或第五方面的第七种可能的实现方式，在第八种可能的实现方式中，所述确定单元还用于：确定所述VPLMN对于非漫游终端和/或非采用S8HR通信架构的漫游终端支持SRVCC功能。
第六方面及第七方面还提供了一种接入网网元，该接入网网元具有实现上述方法中接入网网元行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
第六方面，还提供了一种接入网网元，包括：接收器和处理器；其中，
所述接收器，用于接收移动性管理网元的发送的指示信息，所述指示信息用于指示所述移动性管理网元对终端不支持单一无线语音呼叫连续性SRVCC功能，或用于告知所述接入网网元终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构；
所述处理器，用于根据所述指示信息，禁止对所述终端触发单一无线语音呼叫连续性SRVCC流程。
结合第六方面，在第一种可能的实现方式中：
所述接收器还用于接收所述移动性管理网元发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VOLTE业务承载；
若确定所述终端的LTE网络信号质量低于设定值，则所述处理器还用于拒绝所述承载建立请求。
第七方面，还提供了一种接入网网元，包括：
接收单元，用于接收移动性管理网元的发送的指示信息，所述指示信息用于指示所述移动性管理网元对终端不支持单一无线语音呼叫连续性SRVCC功能，或用于告知所述接入网网元终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构；
禁止单元，用于根据所述指示信息，禁止对所述终端触发单一无线语音呼叫连续性SRVCC流程。
结合第七方面，在第一种可能的实现方式中：
所述接收单元还用于接收所述移动性管理网元发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载；
所述接入网网元还包括：
拒绝单元，用于若确定所述终端的LTE网络信号质量低于设定值，则拒绝所述承载建立请求。
第八方面及第九方面还提供了一种移动性管理网元，该移动性管理网元具有实现上述方法中移动性管理网元行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
第八方面，提供了一种移动性管理网元，包括：处理器；
所述处理器，用于确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务；
所述处理器还用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听；
所述处理器还用于确定需要对所述终端进行合法监听；
若收到核心网网关发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载，则所述处理器还用于拒绝所述承载建立请求。
结合第八方面，在第一种可能的实现方式中，所述处理器还用于确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
结合第八方面的第一种可能的实现方式，在第二种可能的实现方式中：
所述处理器具体用于获取所述终端的归属公共陆地移动网HPLMN标识信息；
所述处理器还具体用于查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，所述处理器还具体用于确定所述终端的基于长期演进的语音传输VoLTE业务需要基于S8HR通信架构。
结合第八方面的第一种可能的实现方式，在第三种可能的实现方式中：
所述处理器具体用于获取所述终端的签约数据；
所述处理器还具体用于根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
结合第八方面或结合第八方面的第一种可能的实现方式或结合第八方面的第二种可能的实现方式结合第八方面的第三种可能的实现方式，在第四种可能的实现方式中：
根据所述VPLMN未针对S8HR通信架构部署合法监听功能，所述处理器具体用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
结合第八方面或结合第八方面的第一种可能的实现方式或结合第八方面的第二种可能的实现方式结合第八方面的第三种可能的实现方式，在第五种可能的实现方式中：
根据所述终端和归属公共陆地移动网HPLMN之间的VoLTE呼叫信令和/或会话内容被加密，所述处理器具体用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
结合第八方面的第五种可能的实现方式，在第六种可能的实现方式中，所述移动性管理网元还包括：接收器；
所述接收器，用于接收所述HPLMN的网络设备发送的第一指示信息，所述第一指示信息用于指示针对所述终端或来自所述HPLMN的所有S8HR漫游终端的VoLTE会话的被加密或者加密未关闭；
所述处理器还用于确定所述终端和所述HPLMN之间的VoLTE呼叫信令 和/或会话内容被加密；
所述处理器还用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
结合第八方面的第五种可能的实现方式，在第七种可能的实现方式中：
所述接收器具体用于接收合法监听执行设备发送的第二指示信息，所述第二指示信息用于指示针对所述终端或来自所述HPLMN的所有S8HR漫游终端和所述HPLMN之间的VoLTE会话的被加密或者加密未关闭；
所述处理器具体用于确定所述终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
所述处理器还具体用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
第九方面，提供了一种移动性管理网元，包括：
确定单元，用于确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务；
所述确定单元还用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听；
所述确定单元还用于确定需要对所述终端进行合法监听；
拒绝单元，用于若收到核心网网关发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载，则拒绝所述承载建立请求。
结合第九方面，在第一种可能的实现方式中，所述确定单元还用于：确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
结合第九方面的第一种可能的实现方式，在第二种可能的实现方式中，所述确定单元具体用于：
获取所述终端的归属公共陆地移动网HPLMN标识信息；
查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，确 定所述终端的基于长期演进的语音传输VoLTE业务需要基于S8HR通信架构。
结合第九方面的第一种可能的实现方式，在第三种可能的实现方式中，所述确定单元具体用于：
获取所述终端的签约数据；
根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
结合第九方面或结合第九方面的第一种可能的实现方式或结合第九方面的第二种可能的实现方式结合第九方面的第三种可能的实现方式，在第四种可能的实现方式中，所述确定单元具体用于：
根据所述VPLMN未针对S8HR通信架构部署合法监听功能，确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
结合第九方面或结合第九方面的第一种可能的实现方式或结合第九方面的第二种可能的实现方式结合第九方面的第三种可能的实现方式，在第五种可能的实现方式中，所述确定单元具体用于：
根据所述终端和归属公共陆地移动网HPLMN之间的VoLTE呼叫信令和/或会话内容被加密，确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
结合第九方面的第五种可能的实现方式，在第六种可能的实现方式中，所述还包括：
接收单元，用于接收所述HPLMN的网络设备发送的第一指示信息，所述第一指示信息用于指示针对所述终端或来自所述HPLMN的所有S8HR漫游终端的VoLTE会话的被加密或者加密未关闭；
所述确定单元具体用于确定所述终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
所述确定单元还具体用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
结合第九方面的第五种可能的实现方式，在第七种可能的实现方式中，所述移动性管理网元还包括：
接收单元，用于接收合法监听执行设备发送的第二指示信息，所述第二指示信息用于指示针对所述终端或来自所述HPLMN的所有S8HR漫游终端和所述HPLMN之间的VoLTE会话的被加密或者加密未关闭；
所述确定单元具体用于确定所述终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
所述确定单元还具体用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
实施例本发明实施例提供的一种语音漫游方法，移动性管理网元及接入网网元，具体如下有益效果：
在移动性管理网元确定终端为支持VoLTE业务的漫游终端的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程，避免漫游终端的VoLTE会话可能因进入SRVCC流程而带来的差的用户体验；
在移动性管理网元确定终端为漫游入VPLMN的支持VoLTE业务的终端，且VPLMN无法对终端的VoLTE会话进行合法监听时，且移动性管理网元确定需要对该终端进行合法监听，移动性管理网元拒绝承载建立，从而在VPLMN无法对漫游终端的VoLTE呼叫进行合法监听的情况下，移动性管理网元可以区别对待漫入用户，只对于需要被监听的漫游终端，拒绝其承载建立请求。
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，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅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VoLTE S8HR架构示意图；
图2为本发明实施例提供的一种语音漫游方法的流程示意图；
图3为本发明实施例提供的另一种语音漫游方法的流程示意图；
图4为主叫VoLTE转CSFB流程示意图；
图5为被叫VoLTE转CSFB流程示意图；
图6为本发明实施例提供的又一种语音漫游方法的流程示意图；
图7为本发明实施例提供的一种移动性管理网元的结构示意图；
图8为本发明实施例提供的另一种移动性管理网元的结构示意图；
图9为本发明实施例提供的一种接入网网元的结构示意图；
图10为本发明实施例提供的另一种接入网网元的结构示意图；
图11为本发明实施例提供的又一种移动性管理网元的结构示意图；
图12为本发明实施例提供的又一种移动性管理网元的结构示意图；
图13为本发明实施例提供的又一种接入网网元的结构示意图；
图14为本发明实施例提供的又一种移动性管理网元的结构示意图。
具体实施方式
图2为本发明实施例提供的一种语音漫游方法的流程示意图，该方法包括以下步骤：
S101、移动性管理网元确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务。
如图1所示，本实施例的终端为从HPLMN漫游入VPLMN的漫游用户。漫游终端在VPLMN发起演进分组系统(Evolved Packet System，简称EPS)注册，可能还需要向其HPLMN的IMS网络发起IMS注册请求消息。因此，该注册请求消息包括EPS注册请求消息或IMS注册请求消息。移动性管理网元接收EPS注册请求消息或IMS注册请求消息后，可以确定终端为漫游入VPLMN的且在所述VPLMN中能使用VoLTE业务的终端。本实施例中，该移动性管理网元位于VPLMN中，可以为移动性管理实体(Mobility Management Entity，简称MME)。
S102、所述移动性管理网元禁止所述终端的SRVCC功能。
对于原本正在进行VoLTE业务的漫游终端，如果进入LTE覆盖不好的区域，该区域LTE信号质量不足以继续支持终端的VoLTE会话要求，则接入网网元触发SRVCC切换流程将该终端的VoLTE会话切换至传统2G/3G的CS会话继续进行，保证用户的语音通话不被中断，标准上要求整个切换过程所带来的语音中断时延不能超过300ms，然而，漫游情况下终端的SRVCC切换有可能不能满足该标准要求，因此，在移动性管理网元确定终端为漫游入VPLMN 的支持VoLTE业务的终端时，禁止所述终端的SRVCC功能，从而避免接入网网元触发终端的SRVCC切换流程。
S103、所述移动性管理网元向接入网网元发送指示信息。
移动性管理网元在确定禁止终端的SRVCC功能后，向接入网网元发送指示信息，指示信息用于指示所述移动性管理网元对终端不支持SRVCC功能，和/或用于告知所述接入网网元终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构。对于基于S8HR通信架构进行VoLTE业务，现有技术中更是无论怎么操作，SRVCC切换都不能满足标准的时延要求。
S104、所述接入网网元接收移动性管理网元的发送的指示信息。
S105、所述接入网网元根据所述指示信息，禁止对所述终端触发SRVCC流程。
接入网网元接收移动性管理网元发送的指示信息后，禁止对终端触发SRVCC流程，从而避免了接入网网元触发终端的SRVCC切换流程。
作为S103-S105的一种替代方式，移动性管理网元也可以不向接入网网元发送指示信息，而是当所述移动性管理网元接收到接入网网元发送的针对所述终端的切换请求消息时，所述切换请求消息用于触发SRVCC切换流程，所述移动性管理网元拒绝所述切换请求消息，而接入网网元无需采取任何操作。
根据本发明实施例提供的一种语音漫游方法，在移动性管理网元确定终端为漫游终端且在漫游网络支持VoLTE业务的漫游终端的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程。
图3为本发明实施例提供的另一种语音漫游方法的流程示意图，该方法包括以下步骤：
S201、VPLMN的移动性管理网元接收终端的注册请求消息。
漫游终端在VPLMN的EPS网络发起注册流程时，发送EPS注册请求消息(EPS attach request)/跟踪区更新(Tracking Area Update，简称TAU)request消息给VPLMN的移动性管理网元。
需要说明的是，一般情况下，当网络侧和终端侧同时支持VoLTE和电路域交换回落(Circuit Switched Fallback，简称CSFB)业务的情况下，终端会将所 述EPS attach request/TAU request消息中的附着类型(attach type)/EPS更新类型(EPS update type)信元设置为联合EPS/IMSI附着(combined EPS/IMSI attach)/联合跟踪区位置区更新(combined TA/LA update)，所述附着类型/EPS更新类型信元用于告知网络侧终端请求在4G网络EPS域和2G/3G网络的CS域同时注册。
漫游终端在VPLMN发起EPS注册后，可能还需要向其HPLMN的IMS网络发起IMS注册请求消息。步骤201中的注册请求消息包括EPS注册请求消息或IMS注册请求消息。
S202、所述移动性管理网元确定所述终端为漫游入VPLMN的支持VoLTE业务的终端。
移动性管理网元接收EPS注册请求消息或IMS注册请求消息后，可以确定终端为漫游入VPLMN的支持VoLTE业务的终端。例如，移动性管理网元可以根据EPS注册请求消息或IMS注册请求消息或注册流程中得到的用户签约数据获取终端标识，判断所述终端标识是否属于VPLMN覆盖的本地终端标识范围内，从而判断所述终端是漫游终端；移动性管理网元还可以根据EPS注册请求消息或IMS注册请求消息或注册流程中得到的用户签约数据中的获取终端的HPLMN标识，判断所述HPLMN标识与所述VPLMN是否相同，从而判断终端是漫游终端。
移动性管理网元具体可以根据以下一种或几种方式的结合判断终端在所述VPLMN能够使用VoLTE业务：
一、移动性管理网元可以根据注册流程中获取的用户签约数据，判断终端在所述VPLMN是否能使用VoLTE业务，此处的注册流程可以是EPS注册流程或IMS注册流程。例如在EPS注册流程中移动性管理网元可能获取到终端的签约数据中包含指示在所述VPLMN终端可以使用VoLTE业务的指示信息，则移动性管理网元可据此指示信息判断终端在所述VPLMN能使用VoLTE业务。又如在IMS注册流程中，移动性管理网元可以根据获取到用户签约数据中包含STN-SR判断终端在VPLMN能使用VoLTE业务。
二、移动性管理网元可以判断所述VPLMN和所述终端的HPLMN之间是否存在VoLTE漫游协议或允许为所述HPLMN终端提供VoLTE业务的配置信息，据此判断终端在所述VPLMN是否能使用VoLTE业务。S203、所述移动 性管理网元确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
即在本实施例中，该支持VoLTE业务的漫游终端包括S8HR漫游终端，所述S8HR漫游终端是指需要采用S8HR通信机制进行VoLTE的漫游终端。
作为步骤S203的一种实现方式，步骤S203包括：
所述移动性管理网元获取所述终端的HPLMN标识；
所述移动性管理网元查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构。
在该实现方式中，若移动性管理网元中预先配置了VPLMN和其他公共陆地移动网(Public Land Mobile Network，简称PLMN)之间使用S8HR漫游协议信息，则移动性管理网元可以根据配置信息判断。具体地，当移动性管理网元接收到终端的注册请求消息时，识别终端的HPLMN ID，移动性管理网元利用HPLMN ID查询内部配置信息，若VPLMN和HPLMN之间配置使用S8HR漫游协议，则移动性管理网元确定所述终端是S8HR漫游终端。存在另一种情况，当VPLMN默认配置为来自其他HPLMN漫游终端均提供S8HR VoLTE漫游业务，则所述VPLMN无需获取所述终端的HPLMN ID而直接根据所述配置信息判断所述终端为S8HR漫游终端。
作为步骤S203的另一种实现方式，步骤S203包括：
所述移动性管理网元获取所述终端的签约数据；
所述移动性管理网元根据所述签约数据确定所述终端在所述VPLMN的VoLTE业务需要基于S8HR通信架构。
在该实现方式中，移动性管理网元根据终端的签约数据判断，终端的签约数据中可能含有或者不含有某些特定的指示信息，移动性管理网元可据此判断终端是S8HR漫游终端。
一种情况是不含有特定的指示信息，例如，现有技术中，若终端的归属网络HPLMN和拜访网络VPLMN约定使用本地疏导(Local Breakout，简称LBO)架构进行VoLTE，则终端的签约数据中会针对VPLMN的IMS接入点名称 (Access Point Name，简称APN)设置一个受访地址被允许(visited address allowed，简称VAA)标识flag，用于表明终端可以在VPLMN利用LBO漫游架构进行VoLTE呼叫，那么相反，本发明实施例中，移动性管理网元若判断出终端的签约数据中针对VPLMN的IMS APN不含VAA flag，则可判断终端是S8HR漫游终端。
另一种情况是含有特定的指示信息，即本发明实施例对终端的签约数据加以增强，其中增加对某VPLMN是否使用S8HR漫游协议的指示信息。移动性管理网元若判断终端的签约数据中针对VPLMN含有使用S8HR漫游协议的指示信息，则可判断终端是S8HR漫游终端。
又一种特定指示信息是，移动性管理网元根据特定的用于SRVCC的会话转换号码(Session Tranfer Number for SRVCC，简称STN-SR)判断。所述特定的STN-SR号码可以是按特定编码方式的号码，例如全1号码。本发明实施例中，对终端所在的HPLMN的IMS网络设备(具体如P-CSCF/ATCF等)加以增强，HPLMN IMS网络设备在终端的IMS注册过程(终端在VPLMN发起IMS注册请求消息，注册请求消息会被传至HPLMN的IMS网络来)中，判断终端是一个S8HR漫游出用户(具体地，判断终端已经漫游出本HPLMN，并且所在漫游地VPLMN与本HPLMN之间需要使用S8HR漫游架构进行VoLTE业务)，IMS网络设备为终端分配一个特定的STN-SR，特定的STN-SR会被传至HSS并最终会被传至VPLMN的移动性管理网元。移动性管理网元此时可根据特定的STN-SR(一般情况下收到的是普通的STN-SR)判断终端是S8HR漫游终端。在本发明的另一个实施例中，HPLMN可以在HSS中预先将所有签约终端的STN-SR号码初始化设置为特定的STN-SR，当终端向HPLMN IMS网络发起注册时，HPLMN IMS网络设备判断终端是非S8HR漫游出用户，则IMS网络设备为所述终端分配新的非特定STN-SR，相反，若HPLMN IMS网络设备判断终端是S8HR漫游出用户，则不改动所述终端的STN-SR。同上现有技术，终端对应的STN-SR会在IMS注册过程中被传至VPLMN的移动性管理网元，移动性管理网元可根据特定的STN-SR判断终端是S8HR漫游终端。
进一步地，所述移动性管理网元确定所述VPLMN对于非漫游终端和/或非采用S8HR通信架构的漫游终端支持SRVCC功能。
S204、所述移动性管理网元禁止所述终端的单一无线语音呼叫连续性 SRVCC功能。
作为步骤S204的一种实现方式，步骤S204包括：
所述移动性管理网元向接入网网元发送第一指示信息，所述第一指示信息用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
具体地，所述移动性管理网元向接入网网元发送第一指示信息，所述第一指示信息用于指示所述移动性管理网元对所述终端不支持SRVCC功能，包括：
所述移动性管理网元设置SRVCC操作可行性值为否定值；
所述移动性管理网元将所述SRVCC操作可行性值发送给接入网网元，所述SRVCC操作可行性值用于指示所述接入网网元对所述终端不支持SRVCC功能。
在该实现方式中，针对S8HR终端，移动性管理网元将SRVCC操作可行性(SRVCC operation possible)值置为否定值(如false或者impossible)，并将该更新后的值发送给接入网网元，告知接入网网元不支持对终端进行SRVCC操作，需要说明的是，该值也可以原本为否定值，则设置时无需更新该值。根据现有技术，接入网网元若收到否定的SRVCC operation possible值之后，无论在何种条件下都不会对终端触发SRVCC流程。移动性管理网元具体可以在用户初始上下文建立请求(Initial UE context setup)/用户上下文更新请求(UE context modification)/下行非接入层直传(downlink NAS transport)等消息中将否定值的SRVCC operation possible值发送给接入网网元。
作为步骤S204的另一种实现方式，步骤S204包括：
所述移动性管理网元向接入网网元发送第二指示信息，所述第二指示信息用于告知所述接入网网元所述终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构，以使所述接入网网元禁止对所述终端触发SRVCC流程。
在该实现方式中，移动性管理网元向接入网网元发送指示信息，该指示信息用于告知接入网网元该终端是S8HR终端，以使接入网网元无论在何种情况下都禁止对S8HR终端触发SVRCC流程。移动性管理网元具体可以在Initial UE context setup/UE context modification/downlink NAS transport等消息中将指示信息发送给接入网网元。
S205、所述移动性管理网元向接入网网元发送指示信息。
S206、所述接入网网元接收移动性管理网元的发送的指示信息。
S207、所述接入网网元根据所述指示信息，禁止对所述终端触发单一无线语音呼叫连续性SRVCC流程。
S208、所述接入网元网元接收所述移动性管理网元发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VOLTE业务承载。
S209、若确定所述终端的LTE网络信号质量低于设定值，则所述接入网元网元拒绝所述承载建立请求。
进一步地，为了减少后续终端实际需要触发SRVCC的概率，在终端VoLTE呼叫建立(包括主叫或被叫)过程中，接入网网元会收到核心网发来的VoLTE业务承载(一般该承载具体的QCI＝1，其中QCI(QoS Class Identifier)是一个标度值，用于衡量特定的提供给服务数据流的包转发行为)建立请求，此时接入网网元需要判断终端所在的LTE网络上行信号质量参数和/或下行信号质量参数。具体的上行信号质量参数包括所述终端的上行信号强度、所述终端的上行信号信噪比、所述终端的上行丢包率中的至少一种；具体的的下行信号质量参数包括所述终端的下行信号强度、所述终端的下行信号信噪比、所述终端的下行丢包率中的至少一种。
当上行信号质量参数和/或下行信号质量参数低于预设值，则接入网网元拒绝QCI＝1的承载建立请求。具体地，拒绝QCI＝1的承载建立请求可以是通过响应消息来拒绝。进一步所述响应消息中还可能携带具体的原因值。所述原因值具体可以是：Radio resources not available、Failure in the Radio Interface Procedure或者Not supported QCI value，原因值也可是一个标准未定义的原因值，此处并不做限定。
根据现有技术，该拒绝消息经EPS核心网传至IMS网络后，在终端主叫场景下IMS网络会向所述终端发送380/503消息，触发终端重新发起CSFB主叫流程；或者在终端被叫场景下IMS网络会向被叫域选设备发送380/503消息，触发其重新将被叫域选至CS域，对终端发起CSFB被叫流程。这就保证当终端在LTE信号质量不是很好的情况下(后续很有可能需要触发SRVCC流程)发起VoLTE呼叫时，拒绝VoLTE呼叫而将呼叫转为CSFB，从源头上避免或减少了后续的需要触发SRVCC的机会，避免了因网络侧不提供SRVCC功能而带来的掉话体验。其中，关于380/503消息，380和503是具体的会话初始 协议(Session Initiation Protocol，简称SIP)响应消息代码，380表示替换服务，503表示不提供此服务。可以将两者概括为一条消息，此消息用于触发终端或网络侧发起CSFB流程。
具体的主叫VoLTE转CSFB流程如图4所示，该流程包括以下步骤：
1、终端向IMS网络设备(P-CSCF)发送invite消息，请求发起VoLTE呼叫流程。P-CSCF为终端建立主叫VoLTE会话，并将invite消息发往后续网络节点以及对端终端。
2、对端终端可能回复响应，P-CSCF可能会收到183响应消息，P-CSCF将响应消息发送给主叫终端。
3、P-CSCF触发策略与计费规则功能单元(Policy and Charging Rules Function，简称PCRF)向EPS网络设备(PGW)发起IP-CAN session会话建立，见图4中的AAR、RAR、RAA、AAA等四条消息。
4、PGW根据PCRF指示向SGW触发QCI＝1承载建立过程，此承载后续用于传输VOLTE业务数据包，也即为VoLTE业务数据传送建立一个通道。
5、SGW向移动性管理网元发起QCI＝1承载建立请求，移动性管理网元向ENB发送QCI＝1承载建立请求。
6、ENB判断所述终端当前的LTE信号质量，如果低于一定值，ENB拒绝QCI＝1的承载建立请求，其中携带具体的原因值。
7、承载建立拒绝消息经移动性管理网元，SGW/PGW一直传递到P-CSCF。其中含有具体的原因值。具体原因值可以设置。
8、P-CSCF收到含具体原因值的拒绝消息后，向终端发送380/503消息。并且如果前面收到过183消息，那么此时P-CSCF还要向后续网络节点发送cancel消息，取消对端的会话。
9、终端收到380/503消息后，会自动发起CSFB呼叫流程。
被叫流程与上述主叫流程类似，如图5所示的被叫VoLTE转CSFB流程，该流程包括以下步骤：
1、IMS网络设备P-CSCF收到IMS网络其他节点发送的invite消息后，为被叫终端建立被叫VoLTE会话，并将invite消息发给被叫终端。
2、终端收到呼叫请求后回复183响应消息。
3、P-CSCF向PCRF触发IP-CAN会话建立流程，同主叫流程。
4、PGW触发QCI＝1承载建立流程。
5、ENB收到QCI＝1承载建立请求消息后，同主叫流程，需要判断被叫终端当前LTE信号质量，如信号质量低于一定值，则拒绝QCI＝1承载建立请求。
6、P-CSCF收到拒绝消息后，向IMS网络的被叫域选设备发送380/503消息，被叫域选设备对该终端重新触发一个CSFB被叫流程。
终端和EPS网络执行现有的CSFB被叫流程。
根据本发明实施例提供的一种语音漫游方法，在拜访网络的移动性管理网元确定终端在拜访网络为支持VoLTE业务的漫游终端且该VoLTE业务需要基于S8HR通信架构的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程，从而避免目前S8HR漫游架构下SRVCC功能为用户带来的差的用户体验；且在网络侧对漫游终端不提供SRVCC功能的情况下，接入网网元可以在必要的条件下将UE主动或被动发起的volte呼叫转化为CSFB呼叫，尽量避免需要对UE触发SRVCC而网络侧又不支持SVRCC的场景，避免带来的呼叫失败和掉话问题。
当前形势下，多数国家和或政府法律上要求VPLMN可在必要时对漫入用户进行合法监听。然而上述S8HR漫游架构下，漫游终端触发的VoLTE呼叫会话经VPLMN的EPS网络作为承载接入HPLMN的IMS核心网，呼叫的信令和会话内容在终端和IMS网络之间是加密的，因此VPLMN无法对漫入的S8HR终端发起的VoLTE呼叫进行合法监听或者监听难度很大。
图6为本发明实施例提供的又一种语音漫游方法的流程示意图，该方法包括以下步骤：
S301、移动性管理网元确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务。
移动性管理网元确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务具体可以参见图2所示的实施例中的步骤S101或图3所示的实施例中的步骤S201、S202。
作为一种实现方式，进一步地，所述移动性管理网元还可以确定所述终端 的VoLTE业务需要基于S8HR通信架构，具体请参见图3所示的实施例中的步骤S203。
S302、所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
移动性管理网元需要确定VPLMN是否能对终端的VoLTE会话进行合法监听，下面以VoLTE业务需要基于S8HR通信架构为例，说明移动性管理网元如何确定VPLMN无法对终端的VoLTE会话进行合法监听：作为步骤S302的一种实现方式，步骤S302包括：
根据所述VPLMN未针对S8HR漫游架构部署合法监听功能，则所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
在该实现方式中，移动性管理网元确定VPLMN并未针对S8HR漫游架构部署合法监听功能，例如可以通过VPLMN的SGW、接入网网元等设备上并未部署监听VoLTE会话相关信令和数据的功能来判断。
作为步骤S302的另一种实现方式，步骤S302包括：
根据所述终端和HPLMN之间的VoLTE呼叫信令和/或会话内容被加密，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
具体地，所述根据所述终端和HPLMN之间的VoLTE呼叫信令和/或会话内容被加密，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听，包括：
所述移动性管理网元接收所述HPLMN的网络设备发送的第一指示信息，所述第一指示信息用于指示针对所述终端或来自所述HPLMN所有S8HR漫游终端的VoLTE会话的被加密或者加密未关闭；
所述移动性管理网元确定所述终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
又具体地，所述根据所述终端和HPLMN之间的VoLTE呼叫信令和/或会话内容被加密，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听，包括：
所述移动性管理网元接收合法监听执行设备发送的第二指示信息，所述第二指示信息用于指示针对所述终端或来自所述HPLMN的所有S8HR漫游终端和所述HPLMN之间的VoLTE会话的被加密或者加密未关闭；
所述移动性管理网元确定所述终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
该实现方式中，合法监听执行设备具体可以是VPLMN的SGW或接入网网元等。
S303、所述移动性管理网元确定需要对所述终端进行合法监听。
具体的确定方式如下：
a)移动性管理网元获取终端的身份信息，该身份信息包括标识信息，如终端的国际移动用户识别码(International Mobile Subscriber Identification Number，简称IMSI)，移动设备国际身份码(International Mobile Equipment Identity，简称IMEI)等。移动性管理网元获取请求注册的终端的身份信息属于现有技术，此处不加以限定。移动性管理网元上报终端的身份信息至相关的合法监听执行设备(如监听网关)或合法监听控制设备(如监听中心，管理实体(Administration Function，简称ADMF)等)，合法监听执行/控制设备根据所述终端的身份信息判断其是否需要被监听后，告知移动性管理网元结果。
b)合法监听执行/控制设备主动向移动性管理网元下发需要被监听的所有对象的身份信息，移动性管理网元保存该信息。所述移动性管理网元后续在获取请求注册的终端的身份信息后，判断所述终端的身份信息是否包含在其内部保存的需要被监听对象的信息中，如在，则确定所述终端需要被监听。
上述两种方式，并不限定移动性管理网元需要与合法监听执行/控制设备之间存在直接接口，当不存在直接接口时，移动性管理网元可以经中间网元从合法监听执行/控制设备获取必要的信息。
S304、若收到核心网网关发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载，则所述移动性管理网元拒绝所述承载建立请求。
当移动性管理网元接收网关设备(SGW或PGW)发送的针对终端的VoLTE 业务承载(QCI＝1承载)建立请求消息，移动性管理网元拒绝VoLTE业务承载建立请求。根据现有技术，该拒绝消息传至IMS网络后，在终端主叫发起场景下IMS网络会向终端发送380/503消息，触发终端重新发起CSFB主叫流程，或者在终端被叫场景下IMS网络会向被叫域选设备发送380/503消息，触发其重新将被叫域选至CS域，对终端发起CSFB被叫流程。
说明一点，当所述S8HR漫游终端已经在进行VoLTE会话，才被动态识别出需要被合法监听的情况，移动性管理网元并不对终端正在进行的VoLTE会话做任何处理，而是等待此次VoLTE会话结束，下次VoLTE会话发起时，才执行步骤S304，实际上与本发明实施例并不矛盾。
根据本发明实施例提供的一种语音漫游方法，在移动性管理网元确定终端为漫游终端，且VPLMN无法对终端的VoLTE会话进行合法监听时，且移动性管理网元确定需要对该终端进行合法监听，移动性管理网元拒绝该终端的VoLTE业务承载建立，从而在VPLMN无法对漫游终端的VoLTE呼叫进行合法监听的情况下，移动性管理网元可以区别对待漫入终端，对于大多数不需要被合法监听的漫游终端可提供正常的VoLTE业务，使得VoLTE漫游方案可以尽快商用，而对于少数需要被监听的漫游终端，VPLMN将其VoLTE呼叫建立过程转化为CSFB呼叫建立过程，保证终端可以在CS域利用现有机制被监听，同时保证不被终端感知。
需要说明的是，对于前述的各方法实施例，为了简单描述，故将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本发明并不受所描述的动作顺序的限制，因为根据本发明，某些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作和模块并不一定是本发明所必须的。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
本发明实施例方法中的步骤可以根据实际需要进行顺序调整、合并和删减。
图7为本发明实施例提供的一种移动性管理网元的结构示意图，该移动性管理网元1000包括：
确定单元11，用于确定终端为漫游入VPLMN的支持VoLTE业务的终端。
如图1所示，本实施例的终端为从HPLMN漫游入VPLMN的漫游用户。漫游终端在VPLMN发起EPS注册，可能还需要向其HPLMN的IMS网络发起IMS注册请求消息。因此，该注册请求消息包括EPS注册请求消息或IMS注册请求消息。确定单元11接收EPS注册请求消息或IMS注册请求消息后，可以确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务。本实施例中，该移动性管理网元位于VPLMN中，可以为MME。
禁止单元12，用于禁止所述终端的SRVCC功能。
对于原本正在进行VoLTE业务的漫游终端，如果进入LTE覆盖不好的区域，该区域LTE信号质量不足以继续支持终端的VoLTE会话要求，则接入网网元触发SRVCC切换流程将该终端的VoLTE会话切换至传统2G/3G的CS会话继续进行，保证用户的语音通话不被中断，标准上要求整个切换过程所带来的语音中断时延不能超过300ms，然而，漫游情况下终端的SRVCC切换有可能不能满足该标准要求，因此，在移动性管理网元确定终端为漫游入VPLMN的支持VoLTE业务的终端时，禁止所述终端的SRVCC功能，从而避免接入网网元触发终端的SRVCC切换流程。
移动性管理网元在确定禁止终端的SRVCC功能后，向接入网网元发送指示信息，指示信息用于指示所述移动性管理网元对终端不支持SRVCC功能，和/或用于告知所述接入网网元终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构。对于基于S8HR通信架构进行VoLTE业务，现有技术中更是无论怎么操作，SRVCC切换都不能满足标准的时延要求。
根据本发明实施例提供的一种移动性管理网元，在移动性管理网元确定终端为支持VoLTE业务的漫游终端的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程。
图8为本发明实施例提供的另一种移动性管理网元的结构示意图，该移动性管理网元2000包括：
接收单元21，用于接收终端的注册请求消息。
漫游终端在VPLMN的EPS网络发起注册流程时，发送EPS注册请求消 息/跟踪区更新请求消息给VPLMN的移动性管理网元。
漫游终端在VPLMN发起EPS注册后，可能还需要向其HPLMN的IMS网络发起IMS注册请求消息。因此，该注册请求消息包括EPS注册请求消息或IMS注册请求消息。确定单元22，用于确定所述终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务。
移动性管理网元接收EPS注册请求消息或IMS注册请求消息后，可以确定终端为漫游入VPLMN的支持VoLTE业务的终端。
所述确定单元22还用于确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
即在本实施例中，该支持VoLTE业务的漫游终端包括S8HR漫游终端，所述S8HR漫游终端是指需要采用S8HR通信机制进行VoLTE的漫游终端。
作为一种实现方式，所述确定单元22具体用于：
获取所述终端的HPLMN标识；
查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，确定所述终端的VoLTE业务需要基于S8HR通信架构。
在该实现方式中，若移动性管理网元中预先配置了VPLMN和其他公共陆地移动网之间使用S8HR漫游协议信息，则移动性管理网元可以根据配置信息判断。具体地，当移动性管理网元接收到终端的注册请求消息时，识别终端的HPLMN ID，移动性管理网元利用HPLMN ID查询内部配置信息，若VPLMN和HPLMN之间配置使用S8HR漫游协议，则移动性管理网元确定所述终端是S8HR漫游终端。存在另一种情况，当VPLMN默认配置为来自其他HPLMN漫游终端均提供S8HR VoLTE漫游业务，则所述VPLMN无需获取所述终端的HPLMN ID而直接根据所述配置信息判断所述终端为S8HR漫游终端。
作为另一种实现方式，所述确定单元22具体用于：
获取所述终端的签约数据；
根据所述签约数据确定所述终端在所述VPLMN的VoLTE业务需要基于 S8HR通信架构。
在该实现方式中，移动性管理网元根据终端的签约数据判断，终端的签约数据中可能含有或者不含有某些特定的指示信息，移动性管理网元可据此判断终端是S8HR漫游终端。
一种情况是不含有特定的指示信息，例如，现有技术中，若终端的归属网络HPLMN和拜访网络VPLMN约定使用本地疏导架构进行VoLTE，则终端的签约数据中会针对VPLMN的IMS接入点名称设置一个受访地址被允许标识flag，用于表明终端可以在VPLMN利用LBO漫游架构进行VoLTE呼叫，那么相反，本发明实施例中，移动性管理网元若判断出终端的签约数据中针对VPLMN的IMS APN不含VAA flag，则可判断终端是S8HR漫游终端。
另一种情况是含有特定的指示信息，即本发明实施例对终端的签约数据加以增强，其中增加对某VPLMN是否使用S8HR漫游协议的指示信息。移动性管理网元若判断终端的签约数据中针对VPLMN含有使用S8HR漫游协议的指示信息，则可判断终端是S8HR漫游终端。
又一种特定指示信息是，移动性管理网元根据特定的STN-SR判断。所述特定的STN-SR号码可以是按特定编码方式的号码，例如全1号码。本发明实施例中，对终端所在的HPLMN的IMS网络设备(具体如P-CSCF/ATCF等)加以增强，HPLMN IMS网络设备在终端的IMS注册过程(终端在VPLMN发起IMS注册请求消息，注册请求消息会被传至HPLMN的IMS网络来)中，判断终端是一个S8HR漫游出用户(具体地，判断终端已经漫游出本HPLMN，并且所在漫游地VPLMN与本HPLMN之间需要使用S8HR漫游架构进行VoLTE业务)，IMS网络设备为终端分配一个特定的STN-SR，特定的STN-SR会被传至HSS并最终会被传至VPLMN的移动性管理网元。移动性管理网元此时可根据特定的STN-SR(一般情况下收到的是普通的STN-SR)判断终端是S8HR漫游终端。在本发明的另一个实施例中，HPLMN可以在HSS中预先将所有签约终端的STN-SR号码初始化设置为特定的STN-SR，当终端向HPLMN IMS网络发起注册时，HPLMN IMS网络设备判断终端是非S8HR漫游出用户，则IMS网络设备为所述终端分配新的非特定STN-SR，相反，若HPLMN IMS网络设备判断终端是S8HR漫游出用户，则不改动所述终端的STN-SR。同上现有技术，终端对应的STN-SR会在IMS注册过程中被传至 VPLMN的移动性管理网元，移动性管理网元可根据特定的STN-SR判断终端是S8HR漫游终端。
进一步地，所述移动性管理网元确定所述VPLMN对于非漫游终端和/或非采用S8HR通信架构的漫游终端支持SRVCC功能。
禁止单元23，用于禁止所述终端的单一无线语音呼叫连续性SRVCC功能。
作为一种实现方式，所述移动性管理网元2000还包括：发送单元24；
所述发送单元24用于向接入网网元发送第一指示信息，所述第一指示信息用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
具体地，所述移动性管理网元设置SRVCC操作可行性值为否定值；所述移动性管理网元将所述SRVCC操作可行性值发送给接入网网元，所述SRVCC操作可行性值用于指示所述接入网网元对所述终端不支持SRVCC功能。
在该实现方式中，针对S8HR终端，移动性管理网元将SRVCC操作可行性(SRVCC operation possible)值置为否定值(如false或者impossible)，并将该更新后的值发送给接入网网元，告知接入网网元不支持对终端进行SRVCC操作，需要说明的是，该值也可以原本为否定值，则设置时无需更新该值。根据现有技术，接入网网元若收到否定的SRVCC operation possible值之后，无论在何种条件下都不会对终端触发SRVCC流程。移动性管理网元具体可以在用户初始上下文建立请求(Initial UE context setup)/用户上下文更新请求(UE context modification)/下行非接入层直传(downlink NAS transport)等消息中将否定值的SRVCC operation possible值发送给接入网网元。
作为另一种实现方式：
所述发送单元24用于向接入网网元发送第二指示信息，所述第二指示信息用于告知所述接入网网元所述终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构，以使所述接入网网元禁止对所述终端触发SRVCC流程。
在该实现方式中，移动性管理网元向接入网网元发送指示信息，该指示信息用于告知接入网网元该终端是S8HR漫游终端，以使接入网网元无论在何种情况下都禁止对S8HR终端触发SVRCC流程。移动性管理网元具体可以在Initial UE context setup/UE context modification/downlink NAS transport等消息中将指示信息发送给接入网网元。
作为又一种实现方式，所述禁止单元23具体用于：
当接收到接入网网元发送的针对所述终端的切换请求消息时，所述切换请求消息用于触发SRVCC切换流程，拒绝所述切换请求消息。
当然禁止单元23可以将上述方式之间进行结合使用
发送单元24还用于向接入网网元发送指示信息。
根据本发明实施例提供的一种移动性管理网元，在移动性管理网元确定终端为支持VoLTE业务的漫游终端且该VoLTE业务需要基于S8HR通信架构的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程，从而解决目前S8HR漫游架构下不能满足SRVCC的中断时延要求；且在接入网网元接收到移动性管理网元发送的承载建立请求时，测量终端的LTE网络信号质量，若终端的LTE网络信号质量低于设定值，则接入网网元拒绝该承载建立消息，从而保证当终端在LTE信号质量不是很好的情况下发起VoLTE呼叫时，拒绝VoLTE呼叫而将呼叫转为CSFB，从源头上避免或减少了后续的需要触发SRVCC的机会，避免了因网络侧不提供SRVCC功能而带来的掉话体验。
图9为本发明实施例提供的一种接入网网元的结构示意图，该接入网网元3000包括：
接收单元31，用于接收移动性管理网元的发送的指示信息。
禁止单元32，用于根据所述指示信息，禁止对所述终端触发SRVCC流程。
接入网网元接收移动性管理网元发送的指示信息后，禁止对终端触发SRVCC流程，从而避免了接入网网元触发终端的SRVCC切换流程。
根据本发明实施例提供的一种接入网网元，在移动性管理网元确定终端为支持VoLTE业务的漫游终端的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程。
图10为本发明实施例提供的另一种接入网网元的结构示意图，该接入网网元4000包括：
接收单元41，用于接收移动性管理网元的发送的指示信息。
禁止单元42，用于根据所述指示信息，禁止对所述终端触发单一无线语音呼叫连续性SRVCC流程。
所述接收单元41还用于接收所述移动性管理网元发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VOLTE业务承载。
拒绝单元43，用于若确定所述终端的LTE网络信号质量低于设定值，则拒绝所述承载建立请求。
进一步地，为了减少后续终端实际需要触发SRVCC的概率，在终端VoLTE呼叫建立(包括主叫或被叫)过程中，接入网网元会收到核心网发来的VoLTE业务(一般该承载具体的QCI＝1)承载建立请求，此时接入网网元需要判断终端所在的LTE网络信号上行信号质量参数和/或下行信号质量参数。具体的上行信号质量参数包括所述终端的上行信号强度、所述终端的上行信号信噪比、所述终端的上行丢包率中的至少一种；具体的的下行信号质量参数包括所述终端的下行信号强度、所述终端的下行信号信噪比、所述终端的下行丢包率中的至少一种。
当上行信号质量参数和/或下行信号质量参数低于预设值，则接入网网元拒绝QCI＝1的承载建立请求。具体地，拒绝QCI＝1的承载建立请求可以是通过响应消息来拒绝。进一步所述响应消息中还可能携带具体的原因值。所述原因值具体可以是：Radio resources not available、Failure in the Radio Interface Procedure或者Not supported QCI value，原因值也可是一个标准未定义的原因值，此处并不做限定。
根据现有技术，该拒绝消息经EPS核心网传至IMS网络后，在终端主叫场景下IMS网络会向所述终端发送380/503消息，触发终端重新发起CSFB主叫流程；或者在终端被叫场景下IMS网络会向被叫域选设备发送380/503消息，触发其重新将被叫域选至CS域，对终端发起CSFB被叫流程。这就保证当终端在LTE信号质量不是很好的情况下(后续很有可能需要触发SRVCC流程)发起VoLTE呼叫时，拒绝VoLTE呼叫而将呼叫转为CSFB，从源头上避免或减少了后续的需要触发SRVCC的机会，避免了因网络侧不提供SRVCC功能而带来的掉话体验。其中，关于380/503消息，380和503是具体的会话初始协议(Session Initiation Protocol，简称SIP)响应消息代码，380表示替换服务，503表示不提供此服务。可以将两者概括为一条消息，此消息用于触发终端或网络侧发起CSFB流程。
根据本发明实施例提供的一种接入网网元，在拜访网络的移动性管理网元确定终端漫游入拜访网络且在拜访网络能够使用VoLTE业务的终端且该 VoLTE业务需要基于S8HR通信架构的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程，从而避免目前S8HR漫游架构下SRVCC功能为用户带来的差的用户体验；且在网络侧对漫游终端不提供SRVCC功能的情况下，接入网网元可以在必要的条件下将UE主动或被动发起的volte呼叫转化为CSFB呼叫，尽量避免需要对UE触发SRVCC而网络侧又不支持SVRCC的场景，避免带来的呼叫失败和掉话问题。
图11为本发明实施例提供的又一种移动性管理网元的结构示意图，该移动性管理网元5000包括：
确定单元51，用于确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务。
作为一种实现方式，进一步地，所述确定单元51还可以用于确定所述终端的VoLTE业务需要基于S8HR通信架构。
具体地，所述确定单元51具体用于：
获取所述终端的归属公共陆地移动网HPLMN标识信息；
查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，确定所述终端的基于长期演进的语音传输VoLTE业务需要基于S8HR通信架构。
具体地，所述确定单元51具体用于：
获取所述终端的签约数据；
根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
所述确定单元51还用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
作为一种实现方式，所述确定单元51具体用于：
根据所述VPLMN未针对S8HR漫游架构部署合法监听功能，则确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
在该实现方式中，移动性管理网元确定VPLMN并未针对S8HR漫游架构部 署合法监听功能，例如可以通过VPLMN的SGW、接入网网元等设备上并未部署监听VoLTE会话相关信令和数据的功能来判断。
作为另一种实现方式，所述确定单元51具体用于：
根据所述终端和HPLMN之间的VoLTE呼叫信令和/或会话内容被加密，确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
具体地，所述移动性管理网元还包括接收单元(图中未示出)
所述接收单元用于接收所述HPLMN的网络设备发送的第一指示信息，所述第一指示信息用于指示针对所述终端或来自所述HPLMN所有S8HR漫游终端的VoLTE会话的被加密或者加密未关闭；
所述确定单元具体用于确定所述终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
所述确定单元还具体用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
又具体地，所述接收单元还用于接收合法监听执行设备发送的第二指示信息，所述第二指示信息用于指示针对所述终端或来自HPLMN的所有S8HR漫游终端的和所述HPLMN之间的VoLTE会话的被加密或者加密未关闭；
所述确定单元具体用于确定所述终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
所述确定单元还具体用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
该实现方式中，合法监听执行设备具体可以是VPLMN的SGW或接入网网元等。
所述确定单元51还用于确定需要对所述终端进行合法监听。
拒绝单元52，用于若收到核心网网关发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载，则拒绝所述承载建立请求。
当移动性管理网元接收网关设备(SGW或PGW)发送的针对终端的VoLTE语音承载(QCI＝1承载)建立请求消息，移动性管理网元拒绝VoLTE语音承载建立请求。根据现有技术，该拒绝消息传至IMS网络后，IMS网络会向终端发送380/503消息，触发终端重新发起CSFB主叫流程，或者IMS网络会向被叫域选设备发送380/503消息，触发其重新将被叫域选至CS域，对终端发起CSFB被 叫流程。
根据本发明实施例提供的一种移动性管理网元，在移动性管理网元确定终端为漫游用户，且VPLMN无法对终端的VoLTE会话进行合法监听时，且移动性管理网元确定需要对该终端进行合法监听，移动性管理网元拒绝VoLTE业务承载建立消息，从而在VPLMN无法对终端的VoLTE呼叫进行合法监听的情况下，移动性管理网元可以区别对待漫入用户，对于大多数不需要被合法监听的终端可提供正常的VoLTE业务，使得VoLTE漫游方案可以尽快商用，而对于少数需要被监听的终端，VPLMN将其发起的VoLTE呼叫转化为CSFB呼叫，保证终端可以在CS域利用现有机制被监听，同时保证不被终端感知。
图12为本发明实施例提供的又一种移动性管理网元的结构示意图，用于实现上述语音漫游的功能，如图12所示，移动性管理网元6000包括处理器61和存储器62，还可以包括发送器63(图中以虚线表示)，其中，所述处理器61、存储器62和发送器63之间通过总线64相互连接。存储器62存储计算机程序，处理器61执行存储的计算机程序，使得移动性管理网元实施上述语音漫游的方法。
所述处理器61，用于确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务；
所述处理器61还用于禁止所述终端的单一无线语音呼叫连续性SRVCC功能。
作为一种实现方式，所述处理器61还用于：确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
作为另一种实现方式，所述处理器61具体用于获取所述终端的归属公共陆地移动网HPLMN标识信息；
所述处理器61还具体用于查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，所述处理器61还具体用于确定所述终端的VoLTE业务需要基于S8HR通信架构。
作为又一种实现方式，所述处理器61具体用于获取所述终端的签约数据；
所述处理器61还具体用于根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
作为又一种实现方式，发送器63，用于向接入网网元发送第一指示信息，所述第一指示信息用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
作为又一种实现方式，所述处理器61具体用于设置SRVCC操作可行性值为否定值；
所述发送器63具体用于将所述SRVCC操作可行性值发送给接入网网元，所述SRVCC操作可行性值用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
作为又一种实现方式，发送器63，用于向接入网网元发送第二指示信息，所述第二指示信息用于告知所述接入网网元所述终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构，以使所述接入网网元禁止对所述终端触发SRVCC流程。
作为又一种实现方式，所述处理器61具体用于：当接收到接入网网元发送的针对所述终端的切换请求消息时，所述切换请求消息用于触发SRVCC切换流程，拒绝所述切换请求消息。
作为又一种实现方式，所述处理器61还用于确定所述VPLMN对于非漫游终端和/或非采用S8HR通信架构的漫游终端支持SRVCC功能。
根据本发明实施例提供的一种移动性管理网元，在移动性管理网元确定终端为支持VoLTE业务的漫游终端的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程。
图13为本发明实施例提供的又一种接入网网元的结构示意图，用于实现上述语音漫游的功能，如图13所示，接入网网元7000包括接收器71、处理器72和存储器73，其中，所述接收器71、处理器72和存储器73之间通过总线74相互连接。存储器73存储计算机程序，处理器72执行存储的计算机程序，使得接入网网元实施上述语音漫游的方法。
所述接收器71，用于接收移动性管理网元的发送的指示信息，所述指示信息用于指示所述移动性管理网元对终端不支持单一无线语音呼叫连续性 SRVCC功能，或用于告知所述接入网网元终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构；
所述处理器72，用于根据所述指示信息，禁止对所述终端触发单一无线语音呼叫连续性SRVCC流程；
作为一种实现方式，所述接收器71还用于接收所述移动性管理网元发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VOLTE业务承载；
若确定所述终端的LTE网络信号质量低于设定值，则所述处理器72还用于拒绝所述承载建立请求。
根据本发明实施例提供的一种接入网网元，在移动性管理网元确定终端漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务的情况下，禁止该终端的SRVCC功能，并通知接入网网元，从而接入网网元禁止对该终端触发SRVCC流程；且在接入网网元接收到移动性管理网元发送的承载建立请求时，测量终端的LTE网络信号质量，若终端的LTE网络信号质量低于设定值，则接入网网元拒绝该承载建立消息，从而保证当终端在LTE信号质量不是很好的情况下发起VoLTE呼叫时，拒绝VoLTE呼叫而将呼叫转为CSFB，从源头上避免或减少了后续的需要触发SRVCC的机会，避免了因网络侧不提供SRVCC功能而带来的掉话体验。
图14为本发明实施例提供的又一种移动性管理网元的结构示意图，用于实现上述语音漫游的功能，如图14所示，移动性管理网元8000包括处理器81和存储器82，其中，所述处理器81、存储器82分别与总线83连接。存储器82存储计算机程序，处理器81执行存储的计算机程序，使得移动性管理网元实施上述语音漫游的方法。
所述处理器81，用于确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务；
所述处理器81还用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听；
所述处理器81还用于确定需要对所述终端进行合法监听；
若收到核心网网关发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载，则所述处理器81还用于拒绝所述承载建立请求。
根据本发明实施例提供的一种移动性管理网元，在移动性管理网元确定终端为S8HR漫游终端，且VPLMN无法对终端的VoLTE会话进行合法监听时，且移动性管理网元确定需要对该终端进行合法监听，移动性管理网元拒绝VoLTE业务承载建立消息，从而在VPLMN无法对S8HR漫游终端的VoLTE呼叫进行合法监听的情况下，移动性管理网元可以区别对待S8HR漫入用户，对于大多数不需要被合法监听的S8HR终端可提供正常的VoLTE业务，使得S8HR VoLTE漫游方案可以尽快商用，而对于少数需要被监听的S8HR终端，VPLMN将其发起的VoLTE呼叫转化为CSFB呼叫，保证终端可以在CS域利用现有机制被监听，同时保证不被终端感知。
本发明实施例装置中的单元可以根据实际需要进行合并、划分和删减。本领域的技术人员可以将本说明书中描述的不同实施例以及不同实施例的特征进行结合或组合。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到本发明可以用硬件实现，或固件实现，或它们的组合方式来实现。当使用软件实现时，可以将上述功能存储在计算机可读介质中或作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括随机存取存储器(Random Access Memory，RAM)、只读存储器(Read-Only Memory，ROM)、电可擦可编程只读存储器(Electrically Erasable Programmable Read-Only Memory，EEPROM)、只读光盘(Compact Disc Read-Only Memory，CD-ROM)或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如，如果软件是使用同轴电缆、光纤光缆、双绞线、数字用户线(Digital Subscriber Line，DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的，那么同轴电缆、光纤光缆、双绞 线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。如本发明所使用的，盘(Disk)和碟(disc)包括压缩光碟(CD)、激光碟、光碟、数字通用光碟(DVD)、软盘和蓝光光碟，其中盘通常磁性的复制数据，而碟则用激光来光学的复制数据。上面的组合也应当包括在计算机可读介质的保护范围之内。
总之，以上所述仅为本发明技术方案的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (38)

  1. 一种语音漫游方法，其特征在于，包括：
    移动性管理网元确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务；
    所述移动性管理网元禁止所述终端的单一无线语音呼叫连续性SRVCC功能。
  2. 如权利要求1所述的方法，其特征在于，还包括：
    所述移动性管理网元确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
  3. 如权利要求2所述的方法，其特征在于，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构，包括：
    所述移动性管理网元获取所述终端的归属公共陆地移动网HPLMN标识信息；
    所述移动性管理网元查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
    若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构。
  4. 如权利要求2所述的方法，其特征在于，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构，包括：
    所述移动性管理网元获取所述终端的签约数据；
    所述移动性管理网元根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
  5. 如权利要求1-4任意一项所述的方法，其特征在于，所述移动性管理网元禁止所述终端的SRVCC功能，包括：
    所述移动性管理网元向接入网网元发送第一指示信息，所述第一指示信息用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
  6. 如权利要求5所述的方法，其特征在于，所述移动性管理网元向接入网网元发送第一指示信息，包括：
    所述移动性管理网元设置SRVCC操作可行性值为否定值；
    所述移动性管理网元将所述SRVCC操作可行性值发送给接入网网元，所述SRVCC操作可行性值用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
  7. 如权利要求2-6任意一项所述的方法，其特征在于，所述移动性管理网元禁止所述终端的SRVCC功能，包括：
    所述移动性管理网元向接入网网元发送第二指示信息，所述第二指示信息用于告知所述接入网网元所述终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构，以使所述接入网网元禁止对所述终端触发SRVCC流程。
  8. 如权利要求1-4任意一项所述的方法，其特征在于，所述移动性管理网元禁止所述终端的SRVCC功能，包括：
    当所述移动性管理网元接收到接入网网元发送的针对所述终端的切换请求消息时，所述切换请求消息用于触发SRVCC切换流程，所述移动性管理网元拒绝所述切换请求消息。
  9. 根据权利要求1-8任意一项所述的方法，其特征在于，还包括：
    所述移动性管理网元确定所述VPLMN对于非漫游终端和/或非采用S8HR通信架构的漫游终端支持SRVCC功能。
  10. 一种语音漫游方法，其特征在于，包括：
    接入网网元接收移动性管理网元的发送的指示信息，所述指示信息用于指 示所述移动性管理网元对终端不支持单一无线语音呼叫连续性SRVCC功能，或用于告知所述接入网网元所述终端为漫游终端且基于长期演进网络的语音传输VoLTE业务需要基于S8HR通信架构；
    所述接入网网元根据所述指示信息，禁止对所述终端触发SRVCC流程。
  11. 如权利要求10所述的方法，其特征在于，还包括：
    所述接入网元网元接收所述移动性管理网元发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载；
    若确定所述终端的LTE网络信号质量低于设定值，则所述接入网元网元拒绝所述承载建立请求。
  12. 一种语音漫游方法，其特征在于，包括：
    移动性管理网元确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用支持基于长期演进网络的语音传输VoLTE业务；
    所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听；
    所述移动性管理网元确定需要对所述终端进行合法监听；
    若收到核心网网关发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载，则所述移动性管理网元拒绝所述承载建立请求。
  13. 如权利要求12所述的方法，其特征在于，还包括：
    所述移动性管理网元确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
  14. 如权利要求13所述的方法，其特征在于，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构，包括：
    所述移动性管理网元获取所述终端的归属公共陆地移动网HPLMN标识信息；
    所述移动性管理网元查找预先设置的与所述HPLNM标识信息对应的配 置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
    若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构。
  15. 如权利要求13所述的方法，其特征在于，所述移动性管理网元确定所述终端的VoLTE业务需要基于S8HR通信架构，包括：
    所述移动性管理网元获取所述终端的签约数据；
    所述移动性管理网元根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
  16. 如权利要求12-15任意一项所述的方法，其特征在于，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听，包括：
    根据所述VPLMN未针对S8HR漫游架构部署合法监听功能，则所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
  17. 如权利要求12-16任意一项所述的方法，其特征在于，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听，包括：
    根据所述终端和HPLMN之间的呼叫信令和/或会话内容被加密，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
  18. 根据权利要求17所述的方法，其特征在于，所述根据所述终端和HPLMN之间的呼叫信令和/或会话内容被加密，所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听，包括：
    所述移动性管理网元接收所述HPLMN的网络设备发送的第一指示信息，所述第一指示信息用于指示针对所述终端或来自所述HPLMN所有S8HR漫游终端的VoLTE会话的被加密或者加密未关闭；
    所述移动性管理网元确定所述终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
    所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进 行合法监听。
  19. 根据权利要求17所述的方法，其特征在于，所述根据所述终端和HPLMN之间的VoLTE呼叫信令和/或会话内容被加密，所述移动性管理网元确定所述VPLMN无法对所述终端的会话进行合法监听，包括：
    所述移动性管理网元接收合法监听执行设备发送的第二指示信息，所述第二指示信息用于指示针对所述终端VoLTE会话的被加密或者加密未关闭；
    所述移动性管理网元确定所述终端或来自所述HPLMN所有S8HR漫游终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
    所述移动性管理网元确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
  20. 一种移动性管理网元，其特征在于，包括：
    确定单元，用于确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用基于长期演进网络的语音传输VoLTE业务；
    禁止单元，用于禁止所述终端的单一无线语音呼叫连续性SRVCC功能。
  21. 如权利要求20所述的移动性管理网元，其特征在于，所述确定单元还用于确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
  22. 如权利要求21所述的移动性管理网元，其特征在于，所述确定单元具体用于：
    获取所述终端的归属公共陆地移动网HPLMN标识信息；
    查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
    若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，确定所述终端的VoLTE业务需要基于S8HR通信架构。
  23. 如权利要求21所述的移动性管理网元，其特征在于，所述确定单元具体用于：
    获取所述终端的签约数据；
    根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
  24. 如权利要求20-23任意一项所述的移动性管理网元，其特征在于，还包括：
    发送单元，用于向接入网网元发送第一指示信息，所述第一指示信息用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
  25. 如权利要求24所述的移动性管理网元，其特征在于，还包括：
    设置单元，用于设置SRVCC操作可行性值为否定值；
    所述发送单元还用于将所述SRVCC操作可行性值发送给接入网网元，所述SRVCC操作可行性值用于指示所述移动性管理网元对所述终端不支持SRVCC功能。
  26. 如权利要求21-25任意一项所述的移动性管理网元，其特征在于，所述发送单元还用于向接入网网元发送第二指示信息，所述第二指示信息用于告知所述接入网网元所述终端为漫游终端且所述VoLTE业务需要基于S8HR通信架构，以使所述接入网网元禁止对所述终端触发SRVCC流程。
  27. 如权利要求20-23任意一项所述的移动性管理网元，其特征在于，所述禁止单元具体用于当所述移动性管理网元接收到接入网网元发送的针对所述终端的切换请求消息时，所述切换请求消息用于触发SRVCC切换流程，拒绝所述切换请求消息。
  28. 根据权利要求20-27任意一项所述的移动性管理网元，其特征在于，所述确定单元还用于确定所述VPLMN对于非漫游终端和/或非采用S8HR通信架构的漫游终端支持SRVCC功能。
  29. 一种接入网网元，其特征在于，包括：
    接收单元，用于接收移动性管理网元的发送的指示信息，所述指示信息用于指示所述移动性管理网元对终端不支持单一无线语音呼叫连续性SRVCC功能，或用于告知所述接入网网元所述终端为漫游终端且基于长期演进网络的语音传输VoLTE业务需要基于S8HR通信架构；
    禁止单元，用于根据所述指示信息，禁止对所述终端触发SRVCC流程。
  30. 如权利要求29所述的接入网网元，其特征在于：
    所述接收单元还用于接收所述移动性管理网元发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载；
    所述接入网网元还包括：
    拒绝单元，用于若确定所述终端的LTE网络信号质量低于设定值，则拒绝所述承载建立请求。
  31. 一种移动性管理网元，其特征在于，包括：
    确定单元，用于确定终端为漫游入受访的公用陆地移动网VPLMN的终端且所述终端在所述VPLMN能够使用支持基于长期演进网络的语音传输VoLTE业务；
    所述确定单元还用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听；
    所述确定单元还用于确定需要对所述终端进行合法监听；
    拒绝单元，用于若收到核心网网关发送的承载建立请求，所述承载建立请求用于请求为所述终端建立VoLTE业务承载，则拒绝所述承载建立请求。
  32. 如权利要求31所述的移动性管理网元，其特征在于，所述确定单元还用于确定所述终端的VoLTE业务需要基于S8接口归属路由S8HR通信架构。
  33. 如权利要求32所述的移动性管理网元，其特征在于，所述确定单元具体用于：
    获取所述终端的归属公共陆地移动网HPLMN标识信息；
    查找预先设置的与所述HPLNM标识信息对应的配置信息，所述配置信息包括受访的公用陆地移动网VPLMN和所述HPLMN标识对应的HPLMN之间的漫游协议信息；
    若查找到所述HPLMN与所述VPLMN之间存在S8HR漫游协议信息，确定所述终端的VoLTE业务需要基于S8HR通信架构。
  34. 如权利要求32所述的移动性管理网元，其特征在于，所述确定单元具体用于：
    获取所述终端的签约数据；
    根据所述签约数据确定所述终端的VoLTE业务需要基于S8HR通信架构。
  35. 如权利要求32-34任意一项所述的移动性管理网元，其特征在于，所述确定单元具体用于：
    根据所述VPLMN未针对S8HR漫游架构部署合法监听功能，则确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
  36. 如权利要求32-35任意一项所述的移动性管理网元，其特征在于，所述确定单元具体用于：
    根据所述终端和HPLMN之间的呼叫信令和/或会话内容被加密，确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
  37. 根据权利要求36所述的移动性管理网元，其特征在于，所述移动性管理网元还包括：
    接收单元，用于接收所述HPLMN的网络设备发送的第一指示信息，所述第一指示信息用于指示针对所述终端或来自所述HPLMN所有S8HR漫游终端的VoLTE会话的被加密或者加密未关闭；
    所述确定单元具体用于确定所述终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
    所述确定单元还用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
  38. 根据权利要求37所述的移动性管理网元，其特征在于：
    所述接收单元还用于接收合法监听执行设备发送的第二指示信息，所述第二指示信息用于指示针对所述终端VoLTE会话的被加密或者加密未关闭；
    所述确定单元具体用于确定所述终端或来自所述HPLMN所有S8HR漫游终端和所述HPLMN之间的VoLTE呼叫信令和/或会话内容被加密；
    所述确定单元还具体用于确定所述VPLMN无法对所述终端的VoLTE会话进行合法监听。
PCT/CN2015/094016 2015-11-06 2015-11-06 一种语音漫游方法，移动性管理网元及接入网网元 WO2017075814A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/CN2015/094016 WO2017075814A1 (zh) 2015-11-06 2015-11-06 一种语音漫游方法，移动性管理网元及接入网网元
CN201580083881.0A CN108141741B (zh) 2015-11-06 2015-11-06 一种语音漫游方法，移动性管理网元及接入网网元
EP15907656.1A EP3364674B1 (en) 2015-11-06 2015-11-06 Voice roaming method, mobility management network element, and access network element
US15/971,865 US10390209B2 (en) 2015-11-06 2018-05-04 Voice roaming method, mobility management network element, and access network element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/094016 WO2017075814A1 (zh) 2015-11-06 2015-11-06 一种语音漫游方法，移动性管理网元及接入网网元

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/971,865 Continuation US10390209B2 (en) 2015-11-06 2018-05-04 Voice roaming method, mobility management network element, and access network element

Publications (1)

Publication Number Publication Date
WO2017075814A1 true WO2017075814A1 (zh) 2017-05-11

Family

ID=58661438

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/094016 WO2017075814A1 (zh) 2015-11-06 2015-11-06 一种语音漫游方法，移动性管理网元及接入网网元

Country Status (4)

Country Link
US (1) US10390209B2 (zh)
EP (1) EP3364674B1 (zh)
CN (1) CN108141741B (zh)
WO (1) WO2017075814A1 (zh)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3174356A4 (en) * 2015-09-15 2017-11-15 Huawei Technologies Co., Ltd. Service processing method, service processing device, and communication system
CN108668327A (zh) * 2018-04-23 2018-10-16 北京小米移动软件有限公司 移动终端的通信方法及装置
CN109246718A (zh) * 2018-09-30 2019-01-18 京信通信系统（中国）有限公司 一种终端用户行为监控方法及装置
WO2019029228A1 (zh) * 2017-08-11 2019-02-14 中兴通讯股份有限公司 语音业务的处理方法及装置、存储介质
CN109429272A (zh) * 2017-08-31 2019-03-05 华为技术有限公司 一种漫游场景下的分流方法及相关设备
CN109660962A (zh) * 2017-10-10 2019-04-19 中国移动通信集团公司 一种语音呼叫计费方法及装置

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3582581B1 (en) * 2017-03-20 2022-01-26 Huawei Technologies Co., Ltd. Service communication method, access network device and system
US20190190996A1 (en) * 2017-12-20 2019-06-20 T-Mobile Usa, Inc. Network service access control by authorization server
US10694457B1 (en) 2019-02-21 2020-06-23 At&T Intellectual Property I, L.P. Volte roaming using general purpose packet data access
CN112738854B (zh) * 2019-10-14 2021-11-12 大唐移动通信设备有限公司 一种语音切换方法及装置
US11310701B2 (en) * 2019-12-19 2022-04-19 At&T Intellectual Property I, L.P. Facilitating fast return to stand alone advanced networks after voice fall back
CN111885584B (zh) * 2020-07-27 2022-12-02 中国联合网络通信集团有限公司 语音漫游注册方法和融合网元
CN113260088B (zh) * 2021-04-21 2023-05-30 RealMe重庆移动通信有限公司 保持通话业务的方法、装置、终端和存储介质
CN113038523B (zh) * 2021-05-07 2022-11-01 中国联合网络通信集团有限公司 终端识别方法和装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101909343A (zh) * 2009-06-05 2010-12-08 华为技术有限公司 一种语音切换方法和装置
EP2288205A1 (en) * 2009-08-17 2011-02-23 Alcatel Lucent Method and apparatus for roaming between HPLMN with CSoPS IWF interworking function and VPLMN supporting SRVCC
CN103731814A (zh) * 2013-12-26 2014-04-16 中兴通讯股份有限公司 一种业务域和接入域综合决策的设备及呼叫路由的方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102647693B (zh) * 2011-02-18 2016-11-23 中兴通讯股份有限公司 语音业务呼叫连续性实现方法和系统
CN103843398B (zh) * 2011-10-04 2018-05-22 瑞典爱立信有限公司 用于为话音会话选择基于lte的话音或cs回退的方法和设备
WO2013118719A1 (ja) * 2012-02-09 2013-08-15 日産自動車株式会社 燃料電池スタック及び燃料電池システム
MX371382B (es) * 2013-03-15 2020-01-28 Aerpio Therapeutics Inc Composiciones, formulaciones y metodos para tratar enfermedades oculares.
WO2014153608A1 (en) * 2013-03-26 2014-10-02 Gsa Industries (Aust.) Pty. Ltd. A tube coupling
ES2691956T3 (es) * 2013-03-29 2018-11-29 Mobileum Inc. Habilitación de servicios de voz sobre evolución a largo plazo (VoLTE) para abonados itinerantes entrantes no de VoLTE
US9344933B1 (en) * 2014-04-10 2016-05-17 Sprint Communications Company L.P. Mobility management entity (MME) system and method to disable voice over LTE (VoLTE) service of a long term evolution (LTE) base station
US20160135093A1 (en) * 2014-11-10 2016-05-12 Samsung Electronics Co., Ltd. Apparatus and method for handling single radio voice call continuity handover
US9560517B2 (en) * 2015-03-03 2017-01-31 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for providing a service to a roaming UE via a packet data network gateway
US9930578B2 (en) * 2015-05-04 2018-03-27 Apple Inc. Enhanced voice roaming for UE devices associated with a home network without SRVCC
EP3758327B1 (en) * 2015-08-07 2023-05-10 Apple Inc. Ims emergency call routing techniques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101909343A (zh) * 2009-06-05 2010-12-08 华为技术有限公司 一种语音切换方法和装置
EP2288205A1 (en) * 2009-08-17 2011-02-23 Alcatel Lucent Method and apparatus for roaming between HPLMN with CSoPS IWF interworking function and VPLMN supporting SRVCC
CN103731814A (zh) * 2013-12-26 2014-04-16 中兴通讯股份有限公司 一种业务域和接入域综合决策的设备及呼叫路由的方法

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3174356A4 (en) * 2015-09-15 2017-11-15 Huawei Technologies Co., Ltd. Service processing method, service processing device, and communication system
US10694571B2 (en) 2015-09-15 2020-06-23 Huawei Technologies Co., Ltd. Service processing method and service processing apparatus
US11497076B2 (en) 2015-09-15 2022-11-08 Huawei Technologies Co., Ltd. Service processing method and service processing apparatus
WO2019029228A1 (zh) * 2017-08-11 2019-02-14 中兴通讯股份有限公司 语音业务的处理方法及装置、存储介质
CN109392010A (zh) * 2017-08-11 2019-02-26 中兴通讯股份有限公司 语音业务的处理方法及装置
CN109429272A (zh) * 2017-08-31 2019-03-05 华为技术有限公司 一种漫游场景下的分流方法及相关设备
CN109660962A (zh) * 2017-10-10 2019-04-19 中国移动通信集团公司 一种语音呼叫计费方法及装置
CN109660962B (zh) * 2017-10-10 2020-07-17 中国移动通信集团公司 一种语音呼叫计费方法及装置
CN108668327A (zh) * 2018-04-23 2018-10-16 北京小米移动软件有限公司 移动终端的通信方法及装置
CN108668327B (zh) * 2018-04-23 2021-04-13 北京小米移动软件有限公司 移动终端的通信方法及装置
CN109246718A (zh) * 2018-09-30 2019-01-18 京信通信系统（中国）有限公司 一种终端用户行为监控方法及装置
CN109246718B (zh) * 2018-09-30 2022-05-24 京信网络系统股份有限公司 一种终端用户行为监控方法及装置

Also Published As

Publication number Publication date
EP3364674B1 (en) 2019-10-09
CN108141741B (zh) 2020-04-14
EP3364674A1 (en) 2018-08-22
US10390209B2 (en) 2019-08-20
EP3364674A4 (en) 2018-12-05
US20180255447A1 (en) 2018-09-06
CN108141741A (zh) 2018-06-08

Similar Documents

Publication Publication Date Title
WO2017075814A1 (zh) 一种语音漫游方法，移动性管理网元及接入网网元
US10757612B2 (en) Controlling fallback procedures for different user groups or device groups
US9408113B2 (en) Methods of and nodes for selecting a target core network for handing over a voice session of a terminal
KR102163634B1 (ko) 서비스 처리 방법 및 장치
US9706444B2 (en) Method and system for enabling circuit switched fallback service in evolved packet system
US9307388B2 (en) Method and apparatus for supporting user equipment mobility in a wireless communication system
US11432208B2 (en) Network handover method, apparatus and system
US8755312B2 (en) Apparatus and method for supporting gateway node reselection in communication system
US20100302937A1 (en) Control Method, System, and Device for Circuit Domain Fallback
KR20150014834A (ko) 특정 서비스를 지속적으로 제공하는 방법 및 장치
WO2009097811A1 (zh) 分组域用户处理电路域业务的方法、装置及系统
WO2011098040A1 (zh) 回退到2g/3g网络的方法和相关设备及通信系统
US20160183127A1 (en) Methods, systems and devices for supporting local breakout in small cell architecture
US20150126130A1 (en) Method for implementing mdt continuity
CN105873010B (zh) 支持用户设备接入无线网络的方法、网络设备及用户设备
WO2014005444A1 (zh) 分流到无线局域网络的接入方法及系统、mme和ue
JP6506298B2 (ja) ビデオ通話サービス品質の増進方法及び装置
WO2010099741A1 (zh) 一种网络选择方法、装置及终端
RU2608594C2 (ru) Bss-извлеченная информация для cs-ps srvcc
CN109089289B (zh) 切换到电路交换域的方法和装置
CN114731547B (zh) 当用户设备(ue)使用第一接入时在第二接入中启用单无线电语音呼叫连续性(srvcc)
CN109842879B (zh) 一种呼叫切换方法和装置
WO2017206150A1 (zh) S8hr漫游架构下的srvcc切换方法和装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15907656

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2015907656

Country of ref document: EP