WO2024093844A1 - 一种eplmn列表的设置方法、核心网设备及介质 - Google Patents

一种eplmn列表的设置方法、核心网设备及介质 Download PDF

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Publication number
WO2024093844A1
WO2024093844A1 PCT/CN2023/127270 CN2023127270W WO2024093844A1 WO 2024093844 A1 WO2024093844 A1 WO 2024093844A1 CN 2023127270 W CN2023127270 W CN 2023127270W WO 2024093844 A1 WO2024093844 A1 WO 2024093844A1
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WIPO (PCT)
Prior art keywords
capability
terminal
network
vonr
home
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PCT/CN2023/127270
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English (en)
French (fr)
Inventor
师瑜
周晶
丁志东
魏进武
冯立华
马泽芳
魏群
任驰
邢天齐
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中国联合网络通信集团有限公司
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Publication of WO2024093844A1 publication Critical patent/WO2024093844A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Definitions

  • the present invention claims priority to a Chinese patent application with an application date of November 1, 2022, application number CN202211354202.7, and name “A method for setting an EPLMN list, core network equipment and medium”.
  • the present invention relates to the field of network technology, and in particular to a method for setting an EPLMN list, a core network device and a medium.
  • 5G core network roaming means that under the independent networking (SA) mode, 5G users of the home network use 5G services by accessing the 5G network of the visited network within the 5G roaming area.
  • SA independent networking
  • the technical problem to be solved by the present invention is to provide a method for setting an EPLMN list, a core network device and a medium in view of the above-mentioned deficiencies in the prior art, so as to solve the problem that the existing method for setting the EPLMN list cannot differentiate and issue the EPLMN list according to the capability information of the terminal and the visited network, which may easily lead to the terminal being unable to use voice services after moving to the visited network, or when the terminal is unable to use voice services in the visited network, it is unable to actively return to the home network, which seriously affects the user experience.
  • the present invention provides a method for setting an EPLMN list, which is applied to a core network device, and the method includes:
  • the roaming PLMN of the visited network and the home PLMN of the home network are set to be equivalent, the roaming PLMN of the visited network or the home PLMN of the home network is carried in the EPLMN list and sent to the terminal.
  • the method before acquiring the capability information of the terminal, the method further includes:
  • the acquiring of the capability information of the terminal and the capability information of the visited network specifically includes:
  • capability information of the terminal and capability information of the visited network are obtained.
  • the registration information includes: location information of the terminal, and/or international mobile subscriber identity code IMSI, and/or international mobile equipment identity code IMEI, and/or international mobile subscriber integrated services digital network MSISDN;
  • the determining, according to the registration information, whether the terminal meets the core network roaming condition specifically includes:
  • Whether the terminal meets the core network roaming condition is determined according to the location information, and/or IMSI, and/or IMEI, and/or MSISDN of the terminal.
  • the acquiring the capability information of the terminal specifically includes:
  • acquiring the VoNR capability of the terminal specifically includes:
  • the VoNR capability of the terminal is obtained according to the value of the VoNR capability field, wherein if the value of the VoNR capability field is supported, it indicates that the terminal has the VoNR capability and is in an on state; if the value of the VoNR capability field is not supported, it indicates that the terminal does not have the VoNR capability or has the VoNR capability but the VoNR capability is in a off state.
  • the sending a first request message to the wireless network device specifically includes:
  • the receiving a first response message sent by the wireless network device based on the first request message specifically includes:
  • a UE radio capability check response message is received, which is sent by the wireless network device based on the UE radio capability check request message.
  • acquiring the VoNR capability of the terminal specifically includes:
  • the UE radio capability information indication message is parsed to obtain the VoNR capability of the terminal.
  • judging, according to the capability information of the terminal and the capability information of the visited network, whether the terminal satisfies a condition for setting a roaming PLMN of the visited network and a home PLMN of the home network to be equivalent specifically includes:
  • the terminal Based on the VoNR capability and/or EPS FB capability of the terminal and the VoNR capability and EPS FB capability of the visited network, it is determined whether the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent.
  • judging whether the terminal satisfies a condition for setting a roaming PLMN of the visited network and a home PLMN of the home network to be equivalent according to the VoNR capability and/or EPS FB capability of the terminal and the VoNR capability and EPS FB capability of the visited network includes at least one of the following:
  • the terminal If the visited network supports the VoNR capability and the EPS FB capability, and the terminal supports at least one of the VoNR capability and the EPS FB capability, it is determined that the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal If the visited network supports the VoNR capability and the EPS FB capability, and the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal If the visited network supports VoNR capability but does not support EPS FB capability, the terminal If the terminal supports VoNR capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability but supports the EPS FB capability, it is determined that the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal If the visited network does not support the VoNR capability but supports the EPS FB capability, and the terminal supports the EPS FB capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support VoNR capability and EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the conditions for setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent.
  • acquiring the VoNR capability of the terminal specifically includes:
  • carrying the roaming PLMN of the visited network or the home PLMN of the home network in the EPLMN list and sending it to the terminal specifically includes:
  • the roaming PLMN of the visited network is carried in the EPLMN list and sent to the terminal;
  • the home PLMN of the home network is carried in the EPLMN list and sent to the terminal.
  • carrying the roaming PLMN of the visited network or the home PLMN of the home network in the EPLMN list and sending it to the terminal specifically includes:
  • An EPLMN list carrying the roaming PLMN of the visited network or the home PLMN of the home network is sent to the terminal through a tracking area update accept message/mobile registration update accept message.
  • the method further comprises:
  • the core network device is a home network core network device and the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent, the EPLMN list is not sent to the terminal, or the EPLMN list without the roaming PLMN of the visited network is sent to the terminal.
  • the method further comprises:
  • the core network device is a visited network core network device and the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent, the terminal access is denied, and an attachment failure message/registration failure message carrying a rejection reason value is sent to the terminal, or a tracking area update failure message/mobile registration update failure message carrying a rejection reason value is sent to the terminal.
  • the present invention provides a core network device, including:
  • a capability acquisition module is used to obtain the capability information of the terminal and the capability information of the visited network
  • condition judgment module connected to the capability acquisition module, for judging whether the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent, according to the capability information of the terminal and the capability information of the visited network;
  • the list sending processing module is connected to the condition judgment module and is used to carry the roaming PLMN of the visited network or the home PLMN of the home network in the EPLMN list and send it to the terminal if the terminal meets the condition that the roaming PLMN of the visited network and the home PLMN of the home network are set to be equivalent.
  • the present invention provides a core network device, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to implement the method for setting the EPLMN list described in the first aspect above.
  • the present invention provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for setting the EPLMN list described in the first aspect above is implemented.
  • the method for setting the EPLMN list, the core network device and the medium provided by the present invention first obtain the capability information of the terminal and the capability information of the visited network; then, according to the capability information of the terminal and the capability information of the visited network, determine whether the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent; if the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent, then the roaming PLMN of the visited network or the home PLMN of the home network is carried in the EPLMN list and sent to the terminal.
  • the present invention can issue the EPLMN list in a differentiated manner according to the capability information of the terminal and the visited network, it can ensure that when the terminal cannot use the voice service of the visited network, it does not roam to the visited network through reselection or redirection, and can reduce the frequent network selection operations of the terminal, or can ensure that when the terminal cannot use the voice service in the visited network, it can actively return to the home network, thereby solving the problem that the existing method for setting the EPLMN list cannot set it in a differentiated manner according to the capability information of the terminal and the visited network, which easily leads to the situation that the terminal cannot use the voice service after moving to the visited network, or when the terminal cannot use the voice service in the visited network, it cannot actively return to the home network, which seriously affects the user experience.
  • FIG1 is a schematic diagram of a core network roaming architecture in a scenario with a home network signal according to an embodiment of the present invention
  • FIG2 is a flow chart of a method for setting an EPLMN list according to Embodiment 1 of the present invention.
  • FIG3 is a schematic diagram of the structure of a core network device according to Embodiment 2 of the present invention.
  • FIG4 is a schematic diagram of the structure of a core network device according to Embodiment 3 of the present invention.
  • each unit and module involved in the embodiments of the present invention may correspond to only one physical structure, or may be composed of multiple physical structures, or multiple units and modules may be integrated into one physical structure.
  • each box in the flowchart or block diagram may represent a unit, module, program segment, or code, which contains executable instructions for implementing the specified functions.
  • each box or combination of boxes in the block diagram and flowchart may be implemented by a hardware-based system that implements the specified functions, or by a combination of hardware and computer instructions.
  • the units and modules involved in the embodiments of the present invention can be implemented by software or hardware.
  • the units and modules can be located in a processor.
  • 5G co-built and shared networks are divided into two network architectures: 5G access network sharing and 5G core network roaming.
  • 5G core network roaming refers to the use of 5G services by 5G users of the home network in the 5G roaming area by accessing the 5G network of the visited network under the independent networking (SA) mode.
  • SA independent networking
  • Mainstream 5G core network roaming is implemented using the home routing method, that is, the roaming user data returns to the home network, and the service is provided by the home network.
  • data services, voice/video services based on IMS (IP Multimedia Subsystem) and SMS over IP short message services should be provided to users at the same time.
  • IMS IP Multimedia Subsystem
  • SMS over IP short message services should be provided to users at the same time.
  • the two operators providing 5G core network roaming services should provide corresponding services to roaming users based on the inter-network roaming agreement.
  • the network architecture of 5G core network roaming can be divided into core network roaming in the scenario of "with home network signal” and core network roaming in the scenario of "without home network signal”.
  • the core network roaming defined by 3GPP mainly refers to the international roaming scenario, that is, when there is no home network signal, the terminal can use the visited network 5G service for access.
  • the N26 interface is the interface between the home network MME (Mobility Management Entity) and the roaming network AMF (Access and Mobility Management Function), and the N14 interface is the interface between the home network AMF and the roaming network AMF.
  • the existing EPLMN list setting method cannot differentiate the capability information of the terminal and the visited network, it is easy for the terminal to be unable to use voice services after moving to the visited network, or when the terminal cannot use voice services in the visited network, it cannot actively return to the home network, which seriously affects the user experience.
  • FIG. 1 shows a schematic diagram of the core network roaming architecture in a scenario with a home network signal.
  • a common method for setting the EPLMN list is as follows: when a 5G terminal first accesses, it needs to first attach/register to the 4G/5G core network of the home network.
  • the home 4G/5G network hopes that the user can enter the visited 5G network in the case of insufficient coverage, it will send an EPLMN list (EPLMN list) to the terminal, set the shared PLMN ID of the visited network to the equivalent PLMN of the current PLMN ID in the home network, and set the shared PLMN ID to a high-priority PLMN.
  • EPLMN list an EPLMN list
  • the terminal When the terminal receives the EPLMN list, it is found that the current PLMN has a shared PLMN ID of EPLMN, and the terminal meets the reselection requirements, or the network indicates When the terminal is redirected to the shared PLMN ID, the terminal can reselect or redirect to the visited 5G network.
  • the existing EPLMN list setting method cannot differentiate the EPLMN list according to the capability information of the terminal and the visited network, it is easy to cause the terminal to be unable to use voice services after moving to the visited 5G network, which seriously affects the user experience. For example, operator A and operator B have deployed core network roaming solutions in signal scenarios.
  • Operator B can provide VoNR (Voice Over New Radio) voice services to users of operator A, but because operator B has not opened the N26 interface between operator A and operator B, it is unable to provide EPS FB (EPS Fallback, Evolved Packet Circuit Domain Fallback) services to user UEA of operator A.
  • EPS FB EPS Fallback, Evolved Packet Circuit Domain Fallback
  • the 4G/5G network of operator A sends the EPLMN list to UEA and sets PLMN A and PLMN X as equivalent PLMNs. Then, UEA can meet the requirements of reselecting and redirecting from operator network A to operator B's 5G network. However, there are both terminals that support VoNR and terminals that do not support VoNR on operator A's network.
  • terminal UEA When terminal UEA that does not support VoNR roams to operator B's 5G network, operator B's network cannot provide voice services for UEA.
  • the terminal will use the offline re-search method to return to 4G or will not be able to use voice services, which greatly affects the user experience.
  • the common method of sending the EPLMN list is: when the 5G terminal accesses for the first time, due to the lack of home network signal, the 5G terminal randomly selects an accessible network for registration; when the network currently registered by the 5G terminal user happens to be a visited network that has signed a core network roaming contract, the visited network will send the EPLMN list to the terminal, which carries the PLMN of the home network; after the terminal receives the EPLMN list, it sets the visited network PLMN of the core network roaming and the home network PLMN to be equivalent, then the 5G terminal will not regularly search for the home network PLMN network signal as defined by the 3GPP protocol, and try to actively return to the home network cell.
  • the visited network will successfully accept the UE's registration request, regardless of whether the UE supports the voice service capabilities of the visited network. If the UE does not support the voice service capabilities of the visited network, the UE cannot use voice services in the visited network and will not actively return to the home network, which seriously affects the user experience.
  • the idea of the present application is to provide a method for setting an EPLMN list, a core network device and a medium, wherein the core network device sends the EPLMN list in a differentiated manner according to the capability information of the terminal and the visited network, so as to ensure that the terminal cannot use the visited network.
  • the terminal uses the voice service of the network, it does not roam to the visited network through reselection or redirection, and can reduce the frequent network selection operations of the terminal, or can ensure that the terminal can actively return to the home network when it cannot use the voice service in the visited network.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides a method for setting an EPLMN list, which is applied to a core network device. As shown in FIG2 , the method includes:
  • Step S101 Acquire capability information of the terminal and capability information of the visited network.
  • a method for setting an EPLMN list provided by the present invention can be applied to the MME of the current network.
  • a method for setting an EPLMN list provided by the present invention can be applied to the AMF of the current network, wherein, in a scenario with a home network, the current network refers to the home network, and in a scenario without a home network, the current network refers to the visited network.
  • the method before acquiring the capability information of the terminal, the method further includes:
  • the acquiring of the capability information of the terminal and the capability information of the visited network specifically includes:
  • capability information of the terminal and capability information of the visited network are obtained.
  • an attach request is sent to the core network device, which carries the registration information of the terminal.
  • a Registration request is sent to the core network device, which carries the registration information of the terminal.
  • the registration information may include at least one of the following: location information of the terminal, such as TAC (Tracking Area Code), IMSI (International Mobile Subscriber Identity), IMEI (International Mobile Equipment Identity), MSISDN (Mobile Subscriber International ISDN), IMS (IP Multimedia Subsystem) voice capability, short message capability and emergency call capability, etc.
  • location information of the terminal such as TAC (Tracking Area Code), IMSI (International Mobile Subscriber Identity), IMEI (International Mobile Equipment Identity), MSISDN (Mobile Subscriber International ISDN), IMS (IP Multimedia Subsystem) voice capability, short message capability and emergency call capability, etc.
  • the core network equipment can determine whether the terminal meets the core network roaming conditions based only on the TAC location information or IMSI of the terminal, or it can determine whether the terminal meets the core network roaming conditions based on a combination of TAC location information and IMSI.
  • the terminal capability information when the core network device determines that the terminal meets the core network roaming conditions, the terminal capability information is obtained, and the terminal capability information may include new radio voice VoNR capability and/or evolved packet circuit fallback EPS FB capability, and may also include IMS voice capability, emergency call capability, etc.
  • EPS FB capability, IMS voice capability and emergency call capability can be obtained from the registration information.
  • acquiring the VoNR capability of the terminal may specifically include:
  • the UE radio capability information indication message is parsed to obtain the VoNR capability of the terminal.
  • the wireless network device is a base station.
  • the base station first initiates a UE capability enquiry message to the terminal to request the terminal's capability information, including VoNR capability, supported frequency band information, etc.
  • the terminal sends UE capability information to the base station, which carries the key capability field requested by the network.
  • the base station sends a UE RADIO CAPABILITY INFO INDICATION message to the core network device, which carries the UE capability information.
  • the existing core network device does not parse the UE capability information of the terminal. If the capability information of the terminal is not parsed, the core network The device cannot obtain the VoNR capability of the terminal. Therefore, in the present invention, when the core network device receives a UE wireless capability information indication message carrying UE capability information sent by the wireless network device, the message can be directly parsed to obtain the VoNR capability of the terminal.
  • acquiring the VoNR capability of the terminal may specifically include:
  • the VoNR capability of the terminal is obtained according to the value of the VoNR capability field, wherein if the value of the VoNR capability field is supported, it indicates that the terminal has the VoNR capability and is in an on state; if the value of the VoNR capability field is not supported, it indicates that the terminal does not have the VoNR capability or has the VoNR capability but the VoNR capability is in a off state.
  • the present invention in order to avoid excessive processing delays caused by excessive capability reading when parsing the UE wireless capability information indication message, the present invention carries the VoNR capability field in the pre-designed first request message and the first response message, so that the core network device can obtain the VoNR capability of the terminal without parsing the UE wireless capability information indication message.
  • the value of the VoNR capability field can be supported (supported) or not supported (not supported), which is consistent with the VoNR capability indication in UECapabilityinformation. If the terminal supports VoNR capability (that is, the terminal has VoNR capability and is in the on state), the value is supported (supported), otherwise it is not supported (not supported).
  • the sending a first request message to the wireless network device specifically includes:
  • UE radio capability match request message (UE RADIO CAPABILITY MATCH REQUEST) or a UE radio capability check request message (UE RADIO CAPABILITY CHECK REQUEST) to the wireless network device;
  • the receiving a first response message sent by the wireless network device based on the first request message may specifically include:
  • UE RADIO CAPABILITY MATCH RESPONSE Receiving a UE radio capability match response message (UE RADIO CAPABILITY MATCH RESPONSE) sent by the wireless network device based on the UE radio capability match request message;
  • Radio capability check response message (UE RADIO CAPABILITY CHECK RESPONSE).
  • the VoNR (Voice over NR) capability field can be carried in the UE radio capability match request message (UE RADIO CAPABILITY MATCH REQUEST) sent by the core network device (MME) to the radio network device (eNB) and the UE radio capability match response message (UE RADIO CAPABILITY MATCH RESPONSE) sent by the eNB to the MME.
  • UE radio capability match request message UE RADIO CAPABILITY MATCH REQUEST
  • UE RADIO CAPABILITY MATCH RESPONSE UE radio capability match response message
  • Table 1 Description of VoNR capability fields in UE RADIO CAPABILITY MATCH REQUEST
  • Table 2 Description of VoNR capability fields in UE RADIO CAPABILITY MATCH RESPONSES
  • the VoNR (Voice over NR) capability field can be carried in the UE radio capability check request message (UE RADIO CAPABILITY CHECK REQUEST) sent by the core network device (AMF) to the radio network device (gNB) and the UE radio capability check response message (UE RADIO CAPABILITY CHECK RESPONSE) sent by the gNB to the AMF.
  • UE radio capability check request message UE RADIO CAPABILITY CHECK REQUEST
  • UE CAPABILITY CHECK RESPONSE UE radio capability check response message
  • Table 3 Description of VoNR capability fields in UE RADIO CAPABILITY CHECK REQUEST
  • Table 4 Description of VoNR capability fields in UE RADIO CAPABILITY CHECK RESPONSE
  • Step S102 judging whether the terminal satisfies a condition of setting a roaming PLMN of the visited network and a home PLMN of the home network to be equivalent, according to the capability information of the terminal and the capability information of the visited network.
  • Step S103 If the terminal meets the requirements of the roaming PLMN of the visited network and the home network If the home PLMN is set to be equivalent, the roaming PLMN of the visited network or the home PLMN of the home network is carried in the EPLMN list and sent to the terminal.
  • the core network of the home network and the core network of the visited network both pre-store capability information of both parties, such as N26 support, VoNR support, EPS FB support, supported network frequency information, etc.
  • judging, according to the capability information of the terminal and the capability information of the visited network, whether the terminal satisfies a condition for setting a roaming PLMN of the visited network and a home PLMN of the home network to be equivalent specifically includes:
  • the terminal Based on the VoNR capability and/or EPS FB capability of the terminal and the VoNR capability and EPS FB capability of the visited network, it is determined whether the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent.
  • judging whether the terminal satisfies a condition for setting a roaming PLMN of the visited network and a home PLMN of the home network to be equivalent according to the VoNR capability and/or EPS FB capability of the terminal and the VoNR capability and EPS FB capability of the visited network includes at least one of the following:
  • the terminal If the visited network supports the VoNR capability and the EPS FB capability, and the terminal supports at least one of the VoNR capability and the EPS FB capability, it is determined that the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal If the visited network supports the VoNR capability and the EPS FB capability, and the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal If the visited network supports the VoNR capability but does not support the EPS FB capability, and the terminal supports the VoNR capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability but supports the EPS FB capability, it is determined that the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal If the visited network supports VoNR capability but does not support EPS FB capability, the terminal does not support VoNR capability and EPS FB capability and the terminal is a non-voice terminal, then Determine that the terminal meets the condition that the roaming PLMN of the visited network and the home PLMN of the home network are set to be equivalent;
  • the terminal If the visited network does not support the VoNR capability but supports the EPS FB capability, and the terminal supports the EPS FB capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support VoNR capability and EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the conditions for setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent.
  • the core network device can specifically determine whether the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent based on the capability information of the terminal shown in Table 5 and the capability information of the visited network. If the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent, the roaming PLMN is sent as EPLMN; otherwise, the roaming PLMN is not sent as EPLMN.
  • the core network device can also determine whether to send the EPLMN list carrying the roaming PLMN of the visited network or the home PLMN of the home network according to other capability information of the terminal or the visited network. For example, considering that the visited network can only provide 5G services but does not support IMS emergency calls, even if the terminal supports VoNR, the emergency call service cannot be used, and the core network device does not open the core network roaming service for such users. That is, if the visited network supports IMS voice and VoNR, but does not support EPS FB and IMS emergency calls, the terminal supports IMS voice and the visited network frequency, and the TAC location information belongs to the core network roaming area, and supports VoNR and IMS emergency calls.
  • the rules for sending the EPLMN list can be customized to different degrees according to the needs of operators. For example, according to the terminal's IMSI, IMEI, VoNR or the frequency of the visited network, IMS capability, EPSFB capability and other information, the EPLMN list can be sent or not sent to the single terminal level, and according to the terminal's location information (TAC) and VoNR information, the EPLMN list can be sent or not sent to the terminals in an area.
  • TAC terminal's location information
  • VoNR the EPLMN list can be sent or not sent to the terminals in an area.
  • acquiring the VoNR capability of the terminal specifically includes:
  • TAU Tracking Area Update
  • MRU Mobility Registration Update
  • the VoNR capability of the terminal is obtained from the tracking area update message or the mobile registration update message.
  • the EPLMN list is not obtained.
  • the UE turns on the VoNR function (that is, the VoNR capability is in the on state).
  • the voice capability of the terminal changes, and the terminal initiates a TAU process, which includes UE capability reporting.
  • the VoNR function has been turned on.
  • the core network device re-judges whether the terminal meets the conditions for issuing the EPLMN list based on the changed VoNR capability of the terminal. If so, a TAU accept message is issued, which carries the EPLMN list.
  • the EPLMN list is not obtained.
  • the UE turns on the VoNR function (that is, the VoNR capability is turned on).
  • the voice capability of the terminal changes, and the terminal initiates the MRU process, which includes UE capability reporting.
  • the VoNR function has been turned on, and the home network core network device changes according to the terminal.
  • the VoNR capability of the terminal re-determines whether the terminal meets the conditions for sending the EPLMN list. If so, an MRU accept message is sent, which carries the EPLMN list.
  • carrying the roaming PLMN of the visited network or the home PLMN of the home network in the EPLMN list and sending it to the terminal specifically includes:
  • the roaming PLMN of the visited network is carried in the EPLMN list and sent to the terminal;
  • the home PLMN of the home network is carried in the EPLMN list and sent to the terminal.
  • the terminal in a scenario with a home network, the terminal resides in the home network, and when the home network core network device determines that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network as equivalent, the roaming PLMN of the visited network is carried in the EPLMN list and sent to the terminal; correspondingly, in a scenario without a home network, the terminal resides in the visited network, and when the visited network core network device determines that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network as equivalent, the home PLMN of the home network is carried in the EPLMN list and sent to the terminal.
  • carrying the roaming PLMN of the visited network or the home PLMN of the home network in the EPLMN list and sending it to the terminal specifically includes:
  • An EPLMN list carrying the roaming PLMN of the visited network or the home PLMN of the home network is sent to the terminal through a tracking area update accept message/mobile registration update accept message.
  • an attach accept message (attach accept)/registration accept message (Registration accept) carrying the EPLMN list is sent to the terminal, or a tracking area update accept message/mobile registration update accept message carrying the EPLMN list is sent to the terminal.
  • the method for setting the EPLMN list does not modify the EPLMN list message body, but only adds judgment logic and processing filters at the core network level, so that the core network can perform operations on terminals with different capabilities without modifying the terminals and wireless networks as much as possible. Distribute the EPLMN list to improve user experience.
  • the method further comprises:
  • the core network device is a home network core network device and the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent, the EPLMN list is not sent to the terminal, or the EPLMN list without the roaming PLMN of the visited network is sent to the terminal.
  • the method further comprises:
  • the core network device is a visited network core network device and the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent, the terminal access is denied, and an attachment failure message/registration failure message carrying a rejection reason value is sent to the terminal, or a tracking area update failure message/mobile registration update failure message carrying a rejection reason value is sent to the terminal.
  • the tracking area update failure message/mobile registration update failure message may carry a rejection reason value, such as: #11PLMN not allowed, #12Tracking area not allowed, #13roaming not allowed in this tracking area; #15No suitable Cells in tracking area, etc.
  • the network in which the terminal currently resides is a 4G network
  • the core network device is an MME of a home network/visited network
  • the wireless network device is an eNB of a home network/visited network
  • the terminal is a 5G terminal.
  • the method for setting the EPLMN list may include the following steps:
  • the 5G terminal When the 5G terminal is turned on and selects a network, it will give priority to logging in to the frequency of the HPLMN (Home Public Land Mobile Network).
  • HPLMN Home Public Land Mobile Network
  • the 5G terminal After the 5G terminal searches for the 4G signal and successfully accesses the 4G network, it initiates an attach request to the MME of the 4G core network, which carries the IMSI, IMEI, location information (TAC), IMS voice capability (IMS PS Voice preferred, CS Voice as secondary), short message capability, emergency call capability, etc., and is sent directly to the MME of the core network through a NAS message.
  • the MME of the 4G core network which carries the IMSI, IMEI, location information (TAC), IMS voice capability (IMS PS Voice preferred, CS Voice as secondary), short message capability, emergency call capability, etc.
  • the eNB initiates a UE capability enquiry to the 5G terminal, and requests the 5G capability information of the terminal.
  • the VoNR capability can be identified in the VoiceoverNR carried in the UE capability message and sent to the 4G eNB.
  • the method for transmitting UE capability information between the 4G wireless network and the core network is as follows:
  • the core network MME can obtain the location information (such as TAC), IMSI, IMEI, MSISDN and other information of the 5G terminal. Based on this information, the MME can determine whether the 5G terminal meets the core network roaming conditions, and thus perform special actions for such terminals. That is, when the MME determines that the 5G terminal meets the conditions for core network roaming, the MME sends a UE RADIO CAPABILITY MATCH REQUEST message to the eNB to request the VoNR capability of the 5G terminal from the eNB, or the MME needs to start this process for all 5G terminals.
  • the location information such as TAC
  • IMSI e.g., IMSI, IMEI, MSISDN
  • the MME can determine whether the 5G terminal meets the core network roaming conditions, and thus perform special actions for such terminals. That is, when the MME determines that the 5G terminal meets the conditions for core network roaming, the MME sends a UE RADIO CAPABILITY MATCH REQUE
  • a new Voice over NR field is set in the message body of UE RADIO CAPABILITY MATCH REQUEST and UE RADIO CAPABILITY MATCH RESPONSE, with a value of supported or not supported. This value is consistent with the VoNR capability indication in UECapabilityInformation.
  • the eNB parses the UE wireless capability and finds that the VoiceoverNR field is supported, it replies with VoiceoverNR as supported in the UE RADIO CAPABILITY CHECK RESPONSE message, so that the MME successfully obtains the VoNR capability of the 5G terminal.
  • the eNB sends the UE capability message to the MME, which directly parses and reads the VoNR capability of the 5G terminal.
  • MME obtains the capability information of the 5G terminal and stores it.
  • the MME determines whether the 5G terminal satisfies the condition that the roaming PLMN of the visited network and the home PLMN of the home network are set to be equivalent. If so, the MME jumps to step (7); otherwise, the MME jumps to step (6):
  • the terminal if the visited network supports the VoNR capability and the EPS FB capability, and the terminal supports at least one of the VoNR capability and the EPS FB capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal if the visited network supports the VoNR capability and the EPS FB capability, and the terminal does not support the VoNR capability and the EPS FB capability and is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal if the visited network supports the VoNR capability but does not support the EPS FB capability, and the terminal supports the VoNR capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the visited network supports VoNR capability but does not support EPS FB capability
  • the terminal does not support VoNR capability but supports EPS FB capability
  • the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal if the visited network does not support the VoNR capability but supports the EPS FB capability, and the terminal supports the EPS FB capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability but supports the EPS FB capability, the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support VoNR capability and EPS FB capability and the terminal is a non-voice terminal, it is judged that the terminal meets the conditions of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent.
  • (6)MME sends an attach accept message to the 5G terminal without carrying the EPLMN list.
  • the MME sends an attach accept message to the 5G terminal, carrying the EPLMN list, to set the roaming PLMN of the visited network and the home PLMN of the home network as equivalent PLMNs.
  • the setting method of the EPLMN list may include the following step:
  • the frequency point where the HPLMN is located is given priority for logging in.
  • the 5G terminal After the 5G terminal searches for the 5G signal and successfully accesses the 5G signal, it initiates a Registration request to the AMF of the 5G core network, which carries the IMSI, IMEI, location information (TAC), IMS voice capability (IMS PS Voice preferred, CS Voice as secondary), short message capability, emergency call capability, etc., and is sent directly to the AMF of the core network through a NAS message.
  • IMSI IMSI, IMEI, location information (TAC), IMS voice capability (IMS PS Voice preferred, CS Voice as secondary), short message capability, emergency call capability, etc.
  • the gNB initiates a UE capability enquiry to the 5G terminal, and requests the 5G capability information of the terminal.
  • the VoNR capability can be identified in the VoiceoverNR carried in the UE capability message and sent to the 5G gNB.
  • the method for transmitting UE capability information between the 5G wireless network and the core network is as follows:
  • the core network AMF can obtain the location information (such as TAC), IMSI, IMEI, MSISDN and other information of the 5G terminal. Based on this information, the AMF can determine whether the 5G terminal meets the core network roaming conditions, and thus perform special actions for such terminals. That is, when the AMF determines that the 5G terminal meets the conditions for core network roaming, the AMF sends a UE RADIO CAPABILITY CHECK REQUEST message to the gNB to request the VoNR capability of the 5G terminal from the gNB, or the AMF needs to start this process for all 5G terminals.
  • the location information such as TAC
  • IMSI e.g., IMSI, IMEI, MSISDN
  • the AMF can determine whether the 5G terminal meets the core network roaming conditions, and thus perform special actions for such terminals. That is, when the AMF determines that the 5G terminal meets the conditions for core network roaming, the AMF sends a UE RADIO CAPABILITY CHECK
  • a new Voice over NR field is set in the message body of UE RADIO CAPABILITY CHECK REQUEST and UE RADIO CAPABILITY CHECK RESPONSE, with a value of supported or not supported. This value is consistent with the VoNR capability indication in UECapabilityInformation.
  • the gNB parses the UE wireless capability and finds that the VoiceoverNR field is supported, it replies in the UE RADIO CAPABILITY CHECK RESPONSE message that VoiceoverNR is supported, so that the AMF successfully obtains the VoNR capability of the 5G terminal.
  • gNB sends the UE capability message to AMF, which directly parses and reads the VoNR capability of the 5G terminal.
  • the AMF determines whether the 5G terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent. If so, it jumps to step (7); otherwise, it jumps to step (6):
  • the terminal if the visited network supports the VoNR capability and the EPS FB capability, and the terminal supports at least one of the VoNR capability and the EPS FB capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal if the visited network supports the VoNR capability and the EPS FB capability, and the terminal does not support the VoNR capability and the EPS FB capability and is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal if the visited network supports the VoNR capability but does not support the EPS FB capability, and the terminal supports the VoNR capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability but supports the EPS FB capability, it is determined that the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal if the visited network does not support the VoNR capability but supports the EPS FB capability, and the terminal supports the EPS FB capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability but supports the EPS FB capability, the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal If the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent.
  • AMF sends a registration accept message to the 5G terminal, carrying the EPLMN list, to set the roaming PLMN of the visited network and the home PLMN of the home network as equivalent PLMNs.
  • the method for setting the EPLMN list, the core network device and the medium provided by the present invention first obtain the capability information of the terminal and the capability information of the visited network; then, according to the capability information of the terminal and the capability information of the visited network, determine whether the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent; if the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent, then the roaming PLMN of the visited network or the home PLMN of the home network is carried in the EPLMN list and sent to the terminal.
  • the present invention can issue the EPLMN list in a differentiated manner according to the capability information of the terminal and the visited network, it can ensure that when the terminal cannot use the voice service of the visited network, it does not roam to the visited network through reselection or redirection, and can reduce the frequent network selection operations of the terminal, or can ensure that when the terminal cannot use the voice service in the visited network, it can actively return to the home network, thereby solving the problem that the existing method for setting the EPLMN list cannot set it in a differentiated manner according to the capability information of the terminal and the visited network, which easily leads to the situation that the terminal cannot use the voice service after moving to the visited network, or when the terminal cannot use the voice service in the visited network, it cannot actively return to the home network, which seriously affects the user experience.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • this embodiment provides a core network device, which is used to execute the above-mentioned method for setting the EPLMN list, including:
  • a capability acquisition module 11 is used to acquire capability information of the terminal and capability information of the visited network
  • the condition judgment module 12 is connected to the capability acquisition module 11 and is used to determine the capability information of the terminal and the capability information of the visited network, determining whether the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the list sending processing module 13 is connected to the condition judgment module 12, and is used to carry the roaming PLMN of the visited network or the home PLMN of the home network in the EPLMN list and send it to the terminal if the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent.
  • the core network device further includes:
  • a registration information acquisition module used to receive an attachment request/registration request of the terminal, and acquire the registration information of the terminal from the attachment request/registration request of the terminal;
  • a roaming condition determination module configured to determine whether the terminal meets the core network roaming condition according to the registration information
  • the capability acquisition module 11 is specifically used for:
  • capability information of the terminal and capability information of the visited network are obtained.
  • the registration information includes: location information of the terminal, and/or international mobile subscriber identity code IMSI, and/or international mobile equipment identity code IMEI, and/or international mobile subscriber integrated services digital network MSISDN;
  • the roaming condition determination module is specifically used for:
  • Whether the terminal meets the core network roaming condition is determined according to the location information, and/or IMSI, and/or IMEI, and/or MSISDN of the terminal.
  • the capability acquisition module 11 includes:
  • the terminal capability acquisition unit is used to obtain the new air interface voice VoNR capability and/or evolved packet circuit fallback EPS FB capability of the terminal.
  • the terminal capability acquisition unit includes:
  • a first sending unit configured to send a first request message to a wireless network device, where the first request message is used to request to obtain the VoNR capability of the terminal;
  • a first receiving unit configured to receive a first response message sent by the wireless network device based on the first request message, where the first response message carries a VoNR capability field;
  • a first acquisition unit is configured to acquire the VoNR capability of the terminal according to the value of the VoNR capability field, wherein if the value of the VoNR capability field is supported, it indicates that the terminal The terminal has VoNR capability and is in an on state. If the value of the VoNR capability field is not supported, it means that the terminal does not have VoNR capability or has VoNR capability but the VoNR capability is in an off state.
  • the first sending unit is specifically configured to:
  • the first receiving unit is specifically configured to:
  • a UE radio capability check response message is received, which is sent by the wireless network device based on the UE radio capability check request message.
  • the terminal capability acquisition unit includes:
  • a second receiving unit configured to receive a UE wireless capability information indication message sent by a wireless network device
  • the parsing and obtaining unit is used to parse the UE radio capability information indication message to obtain the VoNR capability of the terminal.
  • condition judgment module 12 is specifically used for:
  • the terminal Based on the VoNR capability and/or EPS FB capability of the terminal and the VoNR capability and EPS FB capability of the visited network, it is determined whether the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent.
  • condition judgment module 12 judges whether the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent according to at least one of the following:
  • the terminal If the visited network supports the VoNR capability and the EPS FB capability, and the terminal supports at least one of the VoNR capability and the EPS FB capability, it is determined that the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal If the visited network supports the VoNR capability but does not support the EPS FB capability, and the terminal supports the VoNR capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability but supports the EPS FB capability, it is determined that the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal If the visited network does not support the VoNR capability but supports the EPS FB capability, and the terminal supports the EPS FB capability, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support the VoNR capability and the EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent;
  • the terminal does not support VoNR capability and EPS FB capability and the terminal is a non-voice terminal, it is determined that the terminal meets the conditions for setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent.
  • the terminal capability acquisition unit includes:
  • An update message receiving unit is used to receive a tracking area update message or a mobile registration update message sent by a terminal, wherein the tracking area update message or the mobile registration update message carries the terminal VoNR capability;
  • the VoNR acquisition unit is used to acquire the VoNR capability of the terminal from the tracking area update message or the mobile registration update message.
  • the list sending processing module 13 includes:
  • a first sending unit configured to carry the roaming PLMN of the visited network in an EPLMN list and send the list to the terminal if the core network device is a home network core network device;
  • the second sending unit is used for carrying the home PLMN of the home network in the EPLMN list and sending it to the terminal if the core network device is a visited network core network device.
  • the list sending processing module 13 includes:
  • a message sending unit configured to send an EPLMN list carrying a roaming PLMN of the visited network or a home PLMN of the home network to the terminal through an attach accept message/registration accept message;
  • An EPLMN list carrying the roaming PLMN of the visited network or the home PLMN of the home network is sent to the terminal through a tracking area update accept message/mobile registration update accept message.
  • the core network device further includes:
  • the first processing module is used for not sending the EPLMN list to the terminal, or sending the EPLMN list without the roaming PLMN of the visited network to the terminal, if the core network device is a core network device of the home network and the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent.
  • the core network device further includes:
  • the second processing module is used to deny access to the terminal and send an attachment failure message/registration failure message carrying a rejection reason value to the terminal if the core network device is a visited network core network device and the terminal does not meet the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent, or send a tracking area update failure message/mobile registration update failure message carrying a rejection reason value to the terminal.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • this embodiment provides a core network device, including a memory 21 and a processor 22, wherein the memory 21 stores a computer program, and the processor 22 is configured to execute the computer program.
  • the machine program is used to execute the setting method of the EPLMN list in Example 1.
  • the memory 21 is connected to the processor 22.
  • the memory 21 may be a flash memory, a read-only memory or other memory.
  • the processor 22 may be a central processing unit or a single-chip microcomputer.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • This embodiment provides a computer-readable storage medium, on which a computer program is stored.
  • the computer program is executed by a processor, the method for setting the EPLMN list in the above-mentioned embodiment 1 is implemented.
  • the computer-readable storage medium includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, computer program modules or other data).
  • Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable read only memory), flash memory or other memory technology, CD-ROM (Compact Disc Read-Only Memory), digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer.
  • the core network device and medium provided in the embodiment of the present invention first obtain the capability information of the terminal and the capability information of the visited network; then, based on the capability information of the terminal and the capability information of the visited network, determine whether the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent; if the terminal satisfies the condition of setting the roaming PLMN of the visited network and the home PLMN of the home network to be equivalent, the roaming PLMN of the visited network or the home PLMN of the home network is carried in the EPLMN list and sent to the terminal.
  • the present invention can issue the EPLMN list in a differentiated manner according to the capability information of the terminal and the visited network, it can ensure that when the terminal cannot use the voice service of the visited network, it does not roam to the visited network through reselection or redirection, and can reduce the terminal's frequent network selection operations, or, it can ensure that when the terminal cannot use the voice service in the visited network, it can actively return to the home network, which solves the problem that the existing method for setting the EPLMN list cannot be set in a differentiated manner according to the capability information of the terminal and the visited network, and can This may easily lead to the situation that the terminal cannot use voice services after moving to the visited network, or when the terminal cannot use voice services in the visited network, it cannot actively return to the home network, which seriously affects the user experience.

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Abstract

本发明提供一种EPLMN列表的设置方法、核心网设备及介质，涉及网络技术领域，该方法包括：获取终端的能力信息以及拜访网络的能力信息；根据终端的能力信息以及拜访网络的能力信息，判断终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；若终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则在EPLMN列表中携带拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端，该方法、核心网设备及介质能够解决现有的EPLMN列表的设置方法不能针对终端以及拜访网络的能力信息有区分性的进行设置，容易导致终端移动到拜访网络后无法使用语音业务，或者当终端在拜访网络下无法使用语音业务时，无法主动返回归属网络的情形。

Description

一种EPLMN列表的设置方法、核心网设备及介质
本发明要求申请日为2022年11月01日、申请号为CN202211354202.7、名称为“一种EPLMN列表的设置方法、核心网设备及介质”的中国专利申请的优先权。
技术领域
本发明涉及网络技术领域，尤其涉及一种EPLMN列表的设置方法、核心网设备及介质。
背景技术
5G核心网漫游是指在独立组网(SA)方式下，归属网络方5G用户在5G漫游区域内通过接入拜访网络方5G网络的方式使用5G业务。
然而，在5G核心网漫游场景下，由于现有的EPLMN(Equivalent Public Land Mobile Network，对等公用陆地移动网)列表的设置方法不能针对终端以及拜访网络的能力信息有区分性的进行设置，容易导致终端移动到拜访网络后无法使用语音业务，或者当终端在拜访网络下无法使用语音业务时，无法主动返回归属网络的情形，严重影响了用户体验。
发明内容
本发明所要解决的技术问题是针对现有技术的上述不足，提供一种EPLMN列表的设置方法、核心网设备及介质，用以解决现有的EPLMN列表的设置方法不能针对终端以及拜访网络的能力信息有区分性的下发EPLMN列表，容易导致终端移动到拜访网络后无法使用语音业务，或者当终端在拜访网络下无法使用语音业务时，无法主动返回归属网络的情形，严重影响了用户体验的问题。
第一方面，本发明提供一种EPLMN列表的设置方法，应用于核心网设备，所述方法包括：
获取终端的能力信息以及拜访网络的能力信息；
根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端。
可选地，所述获取终端的能力信息之前，所述方法还包括：
接收所述终端的附着请求/注册请求，从所述终端的附着请求/注册请求中获取所述终端的注册信息；
根据所述注册信息判断所述终端是否满足核心网漫游条件；
所述获取终端的能力信息以及拜访网络的能力信息，具体包括：
若所述终端满足核心网漫游条件，则获取所述终端的能力信息以及拜访网络的能力信息。
可选地，所述注册信息包括：所述终端的位置信息、和/或国际移动用户识别码IMSI、和/或国际移动设备识别码IMEI、和/或国际移动用户综合业务数字网MSISDN；
所述根据所述注册信息判断所述终端是否满足核心网漫游条件，具体包括：
根据所述终端的位置信息、和/或IMSI、和/或IMEI、和/或MSISDN判断所述终端是否满足核心网漫游条件。
可选地，所述获取所述终端的能力信息，具体包括：
获取所述终端的新空口语音VoNR能力和/或演进分组电路域回落EPS FB能力。
可选地，获取所述终端的VoNR能力，具体包括：
向无线网设备发送第一请求消息，所述第一请求消息用于请求获取所述终端的VoNR能力；
接收所述无线网设备基于所述第一请求消息发送的第一响应消息，所述第一响应消息携带VoNR能力字段；
根据所述VoNR能力字段的值获取所述终端的VoNR能力，其中，若所述VoNR能力字段的值为支持则表示所述终端具有VoNR能力且处于开启状态，若所述VoNR能力字段的值为不支持则表示所述终端不具有VoNR能力或者具备VoNR能力但所述VoNR能力处于关闭状态。
可选地，所述向无线网设备发送第一请求消息，具体包括：
向所述无线网设备发送用户终端设备UE无线能力匹配请求消息或UE无线能力检查请求消息；
所述接收所述无线网设备基于所述第一请求消息发送的第一响应消息，具体包括：
接收所述无线网设备基于所述UE无线能力匹配请求消息发送的UE无线能力匹配响应消息；或者，
接收所述无线网设备基于所述UE无线能力检查请求消息发送的UE无线能力检查响应消息。
可选地，获取所述终端的VoNR能力，具体包括：
接收无线网设备发送的UE无线能力信息指示消息；
对所述UE无线能力信息指示消息进行解析，获取所述终端的VoNR能力。
可选地，所述根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，具体包括：
根据所述终端的VoNR能力和/或EPS FB能力以及拜访网络的VoNR能力和EPS FB能力，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
可选地，所述根据所述终端的VoNR能力和/或EPS FB能力以及拜访网络的VoNR能力和EPS FB能力，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，具体包括以下至少之一：
若所述拜访网络支持VoNR能力、支持EPS FB能力，所述终端支持VoNR能力和EPS FB能力中的至少一种，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终 端支持VoNR能力，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终端不支持VoNR能力，但支持EPS FB能力，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端支持EPS FB能力，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端支持VoNR能力，但不支持EPS FB能力，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、不支持EPS FB能力，所述终端支持VoNR能力和EPS FB能力中的至少一种，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、不支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
可选地，获取所述终端的VoNR能力，具体包括：
接收终端发送的跟踪区更新消息或移动注册更新消息，所述跟踪区更新消息或移动注册更新消息携带所述终端的VoNR能力；
从所述跟踪区更新消息或移动注册更新消息中获取所述终端的 VoNR能力。
可选地，所述在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端，具体包括：
若所述核心网设备为归属网络核心网设备，则在EPLMN列表中携带所述拜访网络的漫游PLMN并发送给所述终端；
若所述核心网设备为拜访网络核心网设备，则在EPLMN列表中携带所述归属网络的归属PLMN并发送给所述终端。
可选地，所述在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端，具体包括：
通过附着接受消息/注册接受消息向所述终端发送携带有所述拜访网络的漫游PLMN或归属网络的归属PLMN的EPLMN列表；或者，
通过跟踪区更新接受消息/移动注册更新接受消息向所述终端发送携带有所述拜访网络的漫游PLMN或归属网络的归属PLMN的EPLMN列表。
可选地，所述方法还包括：
若所述核心网设备为归属网络核心网设备且所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则不向所述终端发送EPLMN列表，或者向所述终端发送没有携带所述拜访网络的漫游PLMN的EPLMN列表。
可选地，所述方法还包括：
若所述核心网设备为拜访网络核心网设备且所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则拒绝所述终端接入，并向所述终端发送携带有拒绝原因值的附着失败消息/注册失败消息，或者向所述终端发送携带有拒绝原因值的跟踪区更新失败消息/移动注册更新失败消息。
第二方面，本发明提供一种核心网设备，包括：
能力获取模块，用于获取终端的能力信息以及拜访网络的能力信息；
条件判断模块，与所述能力获取模块连接，用于根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
列表下发处理模块，与所述条件判断模块连接，用于若所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端。
第三方面，本发明提供一种核心网设备，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以实现上述第一方面所述的EPLMN列表的设置方法。
第四方面，本发明提供一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现上述第一方面所述的EPLMN列表的设置方法。
本发明提供的EPLMN列表的设置方法、核心网设备及介质，首先获取终端的能力信息以及拜访网络的能力信息；然后根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；若所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端。由于本发明能够根据终端以及拜访网络的能力信息有区分性的下发EPLMN列表，因此能够保证在终端无法使用拜访网络的语音业务时，不通过重选或重定向漫游到拜访网络下，且能够减少终端频繁选网的操作，或者，能够保证终端在拜访网络下无法使用语音业务时，能够主动返回归属网络，解决了现有的EPLMN列表的设置方法不能针对终端以及拜访网络的能力信息有区分性的进行设置，容易导致终端移动到拜访网络后无法使用语音业务，或者当终端在拜访网络下无法使用语音业务时，无法主动返回归属网络的情形，严重影响了用户体验的问题。
附图说明
图1为本发明实施例的有归属网络信号场景下的核心网漫游架构示意图；
图2为本发明实施例1的一种EPLMN列表的设置方法的流程图；
图3为本发明实施例2的一种核心网设备的结构示意图；
图4为本发明实施例3的一种核心网设备的结构示意图。
具体实施方式
为使本领域技术人员更好地理解本发明的技术方案，下面将结合附图对本发明实施方式作进一步地详细描述。
可以理解的是，此处描述的具体实施例和附图仅仅用于解释本发明，而非对本发明的限定。
可以理解的是，在不冲突的情况下，本发明中的各实施例及实施例中的各特征可相互组合。
可以理解的是，为便于描述，本发明的附图中仅示出了与本发明相关的部分，而与本发明无关的部分未在附图中示出。
可以理解的是，本发明的实施例中所涉及的每个单元、模块可仅对应一个实体结构，也可由多个实体结构组成，或者，多个单元、模块也可集成为一个实体结构。
可以理解的是，在不冲突的情况下，本发明的流程图和框图中所标注的功能、步骤可按照不同于附图中所标注的顺序发生。
可以理解的是，本发明的流程图和框图中，示出了按照本发明各实施例的系统、装置、设备、方法的可能实现的体系架构、功能和操作。其中，流程图或框图中的每个方框可代表一个单元、模块、程序段、代码，其包含用于实现规定的功能的可执行指令。而且，框图和流程图中的每个方框或方框的组合，可用实现规定的功能的基于硬件的系统实现，也可用硬件与计算机指令的组合来实现。
可以理解的是，本发明实施例中所涉及的单元、模块可通过软件的方式实现，也可通过硬件的方式来实现，例如单元、模块可位于处理器中。
申请概述
近年来，5G技术发展迅猛，然而5G网络的部署投资成本高昂，极大的制约了5G网络发展速度，因此，5G共享网络技术作为一种网络成本优化的方式也越来越受到关注，5G共建共享网络分为两种网络架构， 5G接入网共享和5G核心网漫游。其中，5G核心网漫游是指在独立组网(SA)方式下，归属网络方5G用户在5G漫游区域内通过接入拜访网络方5G网络的方式使用5G业务。5G核心网漫游运营商双方的5G接入网、核心网独立建设和管理，用户独立管理。主流的5G核心网漫游采用归属路由方式实现，即漫游用户数据回到归属网络，业务由归属网络提供。在提供5G核心网漫游的网络，同时应向用户提供数据业务、基于IMS(IP Multimedia Subsystem，IP多媒体子系统)的语音/视频业务以及SMS over IP的短消息业务，提供5G核心网漫游业务的运营商双方应基于网间漫游协议为漫游用户提供相应的服务。
目前，按照场景来分，5G核心网漫游的网络架构可以分为“有归属网络信号”场景下的核心网漫游和“无归属网络信号”场景下的核心网漫游。其中，3GPP定义的核心网漫游主要是指国际漫游场景，即，无任何归属网络信号时，终端才可以使用拜访网络5G服务进行接入，归属网络的4G/5G核心网和漫游网络的5G核心网之间，不存在N26接口和N14接口，N26接口为归属网络MME(Mobility Management Entity，移动性管理实体)和漫游网络AMF(Access and Mobility Management Function，接入及移动性管理功能)之间的接口，N14接口为归属网络AMF和漫游网络AMF之间的接口。然而，在5G核心网漫游场景下，由于现有的EPLMN列表的设置方法不能针对终端以及拜访网络的能力信息有区分性的进行设置，容易导致终端移动到拜访网络后无法使用语音业务，或者当终端在拜访网络下无法使用语音业务时，无法主动返回归属网络的情形，严重影响了用户体验。
图1示出了有归属网络信号场景下的核心网漫游架构示意图，在有归属网络信号场景下，常见的EPLMN列表的设置方法是：5G终端在初次接入时，需要先附着/注册到归属网络的4G/5G核心网，当归属4G/5G网络希望用户能够在覆盖不足的情况下进入到拜访5G网络时，就会下发EPLMN列表(EPLMN list)给终端，将拜访网络的共享PLMN ID设置为归属网络下当前PLMN ID的等效PLMN，并设置共享PLMN ID为高优先级PLMN，当终端接收到EPLMN列表后，得之当前所在的PLMN有共享PLMN ID为EPLMN，终端满足重选要求，或者网络指示 终端重定向到共享PLMN ID时，终端能够重选或者重定向到拜访5G网络。然而，由于现有的EPLMN列表的设置方法不能针对终端以及拜访网络的能力信息有区分性的下发EPLMN列表，容易导致终端移动到拜访5G网络后无法使用语音业务的情形，严重影响了用户体验。比如，运营商A和运营商B部署了有信号场景下的核心网漫游方案，运营商B可以为运营商A的用户提供VoNR(Voice Over New Radio，新空口语音)语音服务，但由于运营商B未开通和运营商A之间的N26接口，因此无法为运营商A的用户UEA提供EPS FB(EPS Fallback，演进分组电路域回落)服务。运营商A的4G/5G网络在UEA附着/注册到A网络时，给UEA下发EPLMN list，并将PLMN A和PLMN X设置为等效PLMN，然后，UEA才能够满足从运营商网络A重选、重定向到运营商B的5G网络。然而，运营商A的网络下同时存在支持VoNR的终端和不支持VoNR的终端，不支持VoNR的终端UEA在漫游到运营商B的5G网络时，运营商B的网络由于无法为UEA提供语音服务，终端会采用脱网重搜方式回到4G或者无法使用语音业务，因此，非常影响用户体验。
在无归属网络信号场景下，常见的EPLMN列表发送方法是：5G终端在初次接入时，由于无归属网络信号，5G终端随机选择可供接入的网络进行注册；当5G终端用户当前注册的网络正好是签约了核心网漫游的拜访网络时，拜访网络会下发EPLMN列表给终端，其中携带归属网络的PLMN；终端收到EPLMN列表后，将核心网漫游的拜访网络PLMN和归属网络PLMN设置为等效，则5G终端不会按照3GPP协议所定义的，定期搜索归属网络PLMN网络信号，尝试主动回到归属网络小区。然而，当5G终端首次开机时，或者在没有EPLMN的情况下首次移动到拜访网络时，正好处于无归属网络信号场景，则拜访网络会顺利接受UE的注册请求，而不管UE是否支持拜访网络所具备的语音业务能力。若UE不支持拜访网络具备的语音业务能力，则UE在拜访网络下无法使用语音业务，且不会主动返回归属网络，严重影响了用户体验。
针对上述技术问题，本申请的构思是提供一种EPLMN列表的设置方法、核心网设备及介质，由核心网设备根据终端以及拜访网络的能力信息有区分性的下发EPLMN列表，从而能够保证在终端无法使用拜访 网络的语音业务时，不通过重选或重定向漫游到拜访网络下，且能够减少终端频繁选网的操作，或者，能够保证终端在拜访网络下无法使用语音业务时，能够主动返回归属网络，解决了现有的EPLMN列表的设置方法不能针对终端以及拜访网络的能力信息有区分性的进行设置，容易导致终端移动到拜访网络后无法使用语音业务，或者当终端在拜访网络下无法使用语音业务时，无法主动返回归属网络的情形，严重影响了用户体验的问题。
在介绍了本申请的基本原理之后，下面将参考附图来具体介绍本申请的各种非限制性实施例。
实施例1：
本实施例提供一种EPLMN列表的设置方法，应用于核心网设备，如图2所示，该方法包括：
步骤S101：获取终端的能力信息以及拜访网络的能力信息。
需要说明的是，当当前网络为4G网络时，本发明提供的一种EPLMN列表的设置方法可以应用于当前网络的MME，当当前网络为5G网络时，本发明提供的一种EPLMN列表的设置方法可以应用于当前网络的AMF，其中，在有归属网络的场景下，当前网络指归属网络，在没有归属网络的场景下，当前网络指拜访网络。
可选地，所述获取终端的能力信息之前，所述方法还包括：
接收所述终端的附着请求/注册请求，从所述终端的附着请求/注册请求中获取所述终端的注册信息；
根据所述注册信息判断所述终端是否满足核心网漫游条件；
所述获取终端的能力信息以及拜访网络的能力信息，具体包括：
若所述终端满足核心网漫游条件，则获取所述终端的能力信息以及拜访网络的能力信息。
在本实施例中，当终端在4G归属网络/拜访网络附着时，向核心网设备发送attach request(附着请求)，其中携带终端的注册信息，当终端在5G归属网络/拜访网络注册时，向核心网设备发送Registration request(注册请求)，其中携带终端的注册信息。
在本实施例中，所述注册信息可以包括以下至少之一：所述终端的位置信息，如TAC(Tracking Area Code，跟踪区代码)、IMSI(International Mobile Subscriber Identity，国际移动用户识别码)、IMEI(International Mobile Equipment Identity，国际移动设备识别码)、MSISDN(Mobile Subscriber International ISDN，国际移动用户综合业务数字网)、IMS(IP Multimedia Subsystem，多媒体子系统)语音能力、短消息能力以及紧急呼叫能力等等。
具体地，可以根据所述终端的位置信息、和/或IMSI、和/或IMEI、和/或MSISDN判断所述终端是否满足核心网漫游条件。
在本实施例中，不同的运营商可以根据实现情况设置不同核心网漫游条件，比如核心网设备可以仅根据终端的TAC位置信息或者IMSI来判断终端是否满足核心网漫游条件，也可以根据TAC位置信息和IMSI的组合判断终端是否满足核心网漫游条件。
在本实施例中，当核心网设备判断出终端满足核心网漫游条件时，获取终端的能力信息，终端的能力信息可以包括新空口语音VoNR能力和/或演进分组电路域回落EPS FB能力，还可以包括IMS语音能力、紧急呼叫能力等。其中，EPS FB能力、IMS语音能力和紧急呼叫能力可以从注册信息中获取。
可选地，获取所述终端的VoNR能力，具体可以包括：
接收无线网设备发送的UE无线能力信息指示消息；
对所述UE无线能力信息指示消息进行解析，获取所述终端的VoNR能力。
在本实施例中，无线网设备为基站，基站先向终端发起UE能力查询(UE capability enquiry)消息，向终端索要终端的能力信息，包括VoNR能力，支持的频段信息等等。终端向基站发送UE能力信息(UE capabilityinformation)，其中携带网络索要的关键能力字段，而后，基站向核心网设备发送UE RADIO CAPABILITY INFO INDICATION(UE无线能力信息指示)消息，其中携带UE能力信息，需要说明的是，根据3GPP协议规定，现有的核心网设备不对终端的UE能力信息(UE capabilityinformation)进行解析，而若不解析终端的能力信息，核心网 设备无法获知终端的VoNR能力，因此，在本发明中，当核心网设备接收到无线网设备发送的携带有UE能力信息的UE无线能力信息指示消息时，可以对该消息进行直接解析，从而获取终端的VoNR能力。
可选地，获取所述终端的VoNR能力，具体可以包括：
向无线网设备发送第一请求消息，所述第一请求消息用于请求获取所述终端的VoNR能力；
接收所述无线网设备基于所述第一请求消息发送的第一响应消息，所述第一响应消息携带VoNR能力字段；
根据所述VoNR能力字段的值获取所述终端的VoNR能力，其中，若所述VoNR能力字段的值为支持则表示所述终端具有VoNR能力且处于开启状态，若所述VoNR能力字段的值为不支持则表示所述终端不具有VoNR能力或者具备VoNR能力但所述VoNR能力处于关闭状态。
在本实施例中，为了避免对UE无线能力信息指示消息进行解析时，由于过多的能力读取导致的处理时延过长，本发明在预先设计的第一请求消息和第一响应消息中携带VoNR能力字段，这样核心网设备无需对UE无线能力信息指示消息进行解析，也可以得到终端的VoNR能力。其中，VoNR能力字段的值可以为支持(supported)或不支持(not supported)，与UECapabilityinformation中的VoNR能力指示保持一致，若终端支持VoNR能力(即终端具有VoNR能力且处于开启状态)，则该值为支持(supported)，否则为不支持(not supported)。
可选地，所述向无线网设备发送第一请求消息，具体包括：
向所述无线网设备发送用户终端设备UE无线能力匹配请求消息(UE RADIO CAPABILITY MATCH REQUEST)或UE无线能力检查请求消息(UE RADIO CAPABILITY CHECK REQUEST)；
所述接收所述无线网设备基于所述第一请求消息发送的第一响应消息，具体可以包括：
接收所述无线网设备基于所述UE无线能力匹配请求消息发送的UE无线能力匹配响应消息(UE RADIO CAPABILITY MATCH RESPONSE)；或者，
接收所述无线网设备基于所述UE无线能力检查请求消息发送的UE 无线能力检查响应消息(UE RADIO CAPABILITY CHECK RESPONSE)。
在本实施例中，若归属网络/拜访网络为4G网络，为了得到终端的VoNR能力，可以在核心网设备(MME)向无线网设备(eNB)发送的UE无线能力匹配请求消息(UE RADIO CAPABILITY MATCH REQUEST)以及eNB向MME发送的UE无线能力匹配响应消息(UE RADIO CAPABILITY MATCH RESPONSE)中携带VoNR(Voice over NR)能力字段，该VoNR能力字段的描述如表1和表2所示：
表1：UE RADIO CAPABILITY MATCH REQUEST中VoNR能力字段描述
表2：UE RADIO CAPABILITY MATCH RESPONSE中VoNR能力字段描述

在本实施例中，若归属网络/拜访网络为5G网络，为了得到终端的VoNR能力，可以在核心网设备(AMF)向无线网设备(gNB)发送的UE无线能力检查请求消息(UE RADIO CAPABILITY CHECK REQUEST)以及gNB向AMF发送的UE无线能力检查响应消息(UE RADIO CAPABILITY CHECK RESPONSE)中携带VoNR(Voice over NR)能力字段，该VoNR能力字段的描述如表3和表4所示：
表3：UE RADIO CAPABILITY CHECK REQUEST中VoNR能力字段描述

表4：UE RADIO CAPABILITY CHECK RESPONSE中VoNR能力字段描述
步骤S102：根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
步骤S103：若所述终端满足将拜访网络的漫游PLMN和归属网络的 归属PLMN设置为等效的条件，则在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端。
在本实施例中，归属网络的核心网和拜访网络的核心网均预存有双方的能力信息，比如N26支持情况、VoNR支持情况、EPS FB支持情况、支持的网络频点信息等等。
可选地，所述根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，具体包括：
根据所述终端的VoNR能力和/或EPS FB能力以及拜访网络的VoNR能力和EPS FB能力，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
可选地，所述根据所述终端的VoNR能力和/或EPS FB能力以及拜访网络的VoNR能力和EPS FB能力，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，具体包括以下至少之一：
若所述拜访网络支持VoNR能力、支持EPS FB能力，所述终端支持VoNR能力和EPS FB能力中的至少一种，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终端支持VoNR能力，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终端不支持VoNR能力，但支持EPS FB能力，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判 断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端支持EPS FB能力，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端支持VoNR能力，但不支持EPS FB能力，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、不支持EPS FB能力，所述终端支持VoNR能力和EPS FB能力中的至少一种，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、不支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
在本实施例中，核心网设备具体可以根据表5所示的终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，若终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则下发漫游PLMN为EPLMN，否则，不下发漫游PLMN为EPLMN。
表5：能力信息与是否下发漫游PLMN为EPLMN的对应关系：

在本实施例中，除了表5所示的情况，在实际应用中，核心网设备还可以根据终端或拜访网络的其他能力信息来判断是否下发携带所述拜访网络的漫游PLMN或归属网络的归属PLMN的EPLMN list，比如，考虑到拜访网络仅能提供5G服务，但不支持IMS紧急呼叫，即使终端支持VoNR，也无法使用紧急呼叫业务，核心网设备对此类用户不开通核心网漫游业务。即若拜访网络支持IMS语音，支持VoNR，但不支持EPS FB，不支持IMS紧急呼叫，终端支持IMS语音，支持拜访网络频点，TAC位置信息属于核心网漫游区域，支持VoNR及IMS紧急呼叫 时，不下发EPLMN list，否则下发EPLMN list。又比如，考虑到部分用户信息如IMSI，MSISDN，IMEI等信息网络可以获取，若用户明确表示不签约核心网漫游业务，则网络可以根据IMSI，MSISDN，IMEI等信息，对该用户不开通核心网漫游业务，即若拜访网络支持IMS语音，支持VoNR，但不支持EPS FB，终端支持IMS语音，支持拜访网络频点，TAC位置信息属于核心网漫游区域，但IMSI＝xxx，或者IMEI＝yyy，或MSISDN＝zzz，则不下发EPLMN list，否则下发EPLMN list。
进一步地，EPLMN list下发的规则设置可以根据运营商需求进行不同程度的精细化定制。如：根据终端的IMSI、IMEI、VoNR或者拜访网络的频点，IMS能力，EPSFB能力等信息，可以针对单终端级下发或者不下发EPLMN list，根据终端的位置信息(TAC)，VoNR信息，可以对一片区域的终端统一下发或者不下发EPLMN list。
可选地，获取所述终端的VoNR能力，具体包括：
接收终端发送的跟踪区更新(Tracking Area Update，简称为TAU)消息或移动注册更新(mobility registration update，简称为MRU)消息，所述跟踪区更新消息或移动注册更新消息携带所述终端的VoNR能力；
从所述跟踪区更新消息或移动注册更新消息中获取所述终端的VoNR能力。
在本实施例中，当不支持VoNR能力的终端(比如终端具有VoNR能力但VoNR能力处于关闭状态)在4G核心网成功附着后，未获得EPLMN list，此时，UE打开VoNR功能(即VoNR能力处于开启状态)，此时，终端的语音能力发生变化，终端发起TAU流程，其中包含UE能力上报，VoNR功能已经打开，核心网设备根据终端变更后的VoNR能力重新判断该终端是否满足EPLMN列表的下发条件，若满足，则下发TAU accept(TAU接受消息)，其中携带EPLMN list。
在本实施例中，当不支持VoNR能力的终端(比如终端具有VoNR能力但VoNR能力处于关闭状态)在5G核心网成功注册后，未获得EPLMN list，此时，UE打开VoNR功能(即VoNR能力处于开启状态)，此时，终端的语音能力发生变化，终端发起MRU流程，其中包含UE能力上报，VoNR功能已经打开，归属网络核心网设备根据终端变更后 的VoNR能力重新判断该终端是否满足EPLMN列表的下发条件，若满足，则下发MRU accept(MRU接受消息)，其中携带EPLMN list。
可选地，所述在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端，具体包括：
若所述核心网设备为归属网络核心网设备，则在EPLMN列表中携带所述拜访网络的漫游PLMN并发送给所述终端；
若所述核心网设备为拜访网络核心网设备，则在EPLMN列表中携带所述归属网络的归属PLMN并发送给所述终端。
在本实施例中，在有归属网络的场景下，终端驻留归属网络，归属网络核心网设备在判断出终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件时，在EPLMN列表中携带所述拜访网络的漫游PLMN并发送给所述终端；相应地，在没有归属网络的场景下，终端驻留拜访网络，拜访网络核心网设备在判断出终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件时，在EPLMN列表中携带所述归属网络的归属PLMN并发送给所述终端。
可选地，所述在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端，具体包括：
通过附着接受消息/注册接受消息向所述终端发送携带有所述拜访网络的漫游PLMN或归属网络的归属PLMN的EPLMN列表；或者，
通过跟踪区更新接受消息/移动注册更新接受消息向所述终端发送携带有所述拜访网络的漫游PLMN或归属网络的归属PLMN的EPLMN列表。
在本实施例中，若所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则向所述终端发送携带有所述EPLMN列表的附着接受消息(attach accept)/注册接受消息(Registration accept)，或者，向所述终端发送携带有所述EPLMN列表的跟踪区更新接受消息/移动注册更新接受消息。
需要说明的是，本发明提供的EPLMN列表的设置方法，不修改EPLMN list消息体，仅在核心网层面加判断逻辑，加处理过滤器，可以使核心网在尽量不改造终端、无线网络的情况下，对不同能力的终端进 行EPLMN list的分发，从而提高用户体验。
可选地，所述方法还包括：
若所述核心网设备为归属网络核心网设备且所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则不向所述终端发送EPLMN列表，或者向所述终端发送没有携带所述拜访网络的漫游PLMN的EPLMN列表。
可选地，所述方法还包括：
若所述核心网设备为拜访网络核心网设备且所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则拒绝所述终端接入，并向所述终端发送携带有拒绝原因值的附着失败消息/注册失败消息，或者向所述终端发送携带有拒绝原因值的跟踪区更新失败消息/移动注册更新失败消息。
在本实施例中，跟踪区更新失败消息/移动注册更新失败消息可以携带拒绝原因值，如：#11PLMN not allowed，#12Tracking area not allowed，#13roaming not allowed in this tracking area；#15No suitable Cells in tracking area等。
在一个具体的实施例中，终端当前驻留的网络是4G网络，核心网设备为归属网络/拜访网络的MME，无线网设备为归属网络/拜访网络的eNB，终端为5G终端，该EPLMN列表的设置方法可以包括如下步骤：
(1)5G终端开机选网，优先选择HPLMN(Home Public Land Mobile Network，本地公用陆地移动网络)所在的频点进行登录。
(2)5G终端搜索到4G信号，随机接入成功后，向4G核心网的MME发起attach request(附着请求)，其中携带IMSI、IMEI、位置信息(TAC)、IMS语音能力(IMS PS Voice preferred，即IMS分组域语音优先，CS Voice as secondary，即电路域语音优先级第二)、短消息能力、紧急呼叫能力等，通过NAS消息直接发送给核心网的MME。
(3)eNB向5G终端发起UE能力查询(UEcapabilityenquiry)，向5G终端索要终端的5G能力信息，当5G终端支持VoNR时，可以通过UE能力消息中携带的VoiceoverNR中标识VoNR能力，发送给4G的eNB。4G无线网和核心网之间传递UE能力信息的方法如下：
a)核心网MME在收到attach request后，可以获知5G终端的位置信息(如TAC)、IMSI、IMEI、MSISDN等信息。MME可以根据此类信息判断5G终端是否满足核心网漫游条件，从而针对此类终端进行特殊的行为，即MME判断5G终端满足可以进行核心网漫游的条件时，MME向eNB发送UE RADIO CAPABILITY MATCH REQUEST消息，向eNB索要5G终端的VoNR能力，或者，MME需要对所有5G终端都开启这个流程。在UE RADIO CAPABILITY MATCH REQUEST和UE RADIO CAPABILITY MATCH RESPONSE的消息体中设置了一个新的Voice over NR字段，值为supported或not supported，该值与UECapabilityinformation中的VoNR能力指示保持一致，当eNB解析UE无线能力，发现VoiceoverNR字段为supported时，在UE RADIO CAPABILITY CHECK RESPONSE消息中回复VoiceoverNR为supported，从而MME成功获取了5G终端的VoNR能力。
b)eNB将UE能力消息发送给MME，MME直接解析，读取5G终端的VoNR能力。
(4)MME获取到5G终端的能力信息后进行存储。
(5)MME判断5G终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，若满足跳转至步骤(7)，否则跳转至步骤(6)：
具体地，若拜访网络支持VoNR能力、支持EPS FB能力，终端支持VoNR能力和EPS FB能力中的至少一种，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络支持VoNR能力、支持EPS FB能力，终端不支持VoNR能力和EPS FB能力且终端为非语音类终端，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络支持VoNR能力、但不支持EPS FB能力，终端支持VoNR能力，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络支持VoNR能力、但不支持EPS FB能力，终端不支持VoNR能力，但支持EPS FB能力，则判断终端不满足将拜访 网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络支持VoNR能力、但不支持EPS FB能力，终端不支持VoNR能力和EPS FB能力且终端为非语音类终端，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络不支持VoNR能力、但支持EPS FB能力，终端支持EPS FB能力，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络不支持VoNR能力、但支持EPS FB能力，终端支持VoNR能力，但不支持EPS FB能力，则判断终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络不支持VoNR能力、但支持EPS FB能力，终端不支持VoNR能力和EPS FB能力且终端为非语音类终端，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络不支持VoNR能力、不支持EPS FB能力，终端支持VoNR能力和EPS FB能力中的至少一种，则判断终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络不支持VoNR能力、不支持EPS FB能力，终端不支持VoNR能力和EPS FB能力且终端为非语音类终端，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
(6)MME下发附着接受(attach accept)消息给5G终端，不携带EPLMN list。
(7)MME下发附着接受(attach accept)消息给5G终端，携带EPLMN list，以将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效PLMN。
在另一个具体的实施例中，若终端当前驻留的网络是5G网络，核心网设备为归属网络/拜访网络的AMF，无线网设备为归属网络/拜访网络的gNB，终端为5G终端，该EPLMN列表的设置方法可以包括如下 步骤：
(1)5G终端开机选网，优先选择HPLMN所在的频点进行登录。
(2)5G终端搜索到5G信号，随机接入成功后，向5G核心网的AMF发起Registration request(注册请求)，其中携带IMSI、IMEI、位置信息(TAC)、IMS语音能力(IMS PS Voice preferred，即IMS分组域语音优先，CS Voice as secondary，即电路域语音优先级第二)、短消息能力、紧急呼叫能力等，通过NAS消息直接发送给核心网的AMF。
(3)gNB向5G终端发起UE能力查询(UEcapabilityenquiry)，向5G终端索要终端的5G能力信息，当5G终端支持VoNR时，可以通过UE能力消息中携带的VoiceoverNR中标识VoNR能力，发送给5G的gNB。5G无线网和核心网之间传递UE能力信息的方法如下：
a)核心网AMF在收到Registration request后，可以获知5G终端的位置信息(如TAC)、IMSI、IMEI、MSISDN等信息。AMF可以根据此类信息判断5G终端是否满足核心网漫游条件，从而针对此类终端进行特殊的行为，即AMF判断5G终端满足可以进行核心网漫游的条件时，AMF向gNB发送UE RADIO CAPABILITY CHECK REQUEST消息，向gNB索要5G终端的VoNR能力，或者，AMF需要对所有5G终端都开启这个流程。在UE RADIO CAPABILITY CHECK REQUEST和UE RADIO CAPABILITY CHECK RESPONSE的消息体中设置了一个新的Voice over NR字段，值为supported或not supported，该值与UECapabilityinformation中的VoNR能力指示保持一致，当gNB解析UE无线能力，发现VoiceoverNR字段为supported时，在UE RADIO CAPABILITY CHECK RESPONSE消息中回复VoiceoverNR为supported，从而AMF成功获取了5G终端的VoNR能力。
b)gNB将UE能力消息发送给AMF，AMF直接解析，读取5G终端的VoNR能力。
(4)AMF获取到5G终端的能力信息后进行存储。
(5)AMF判断5G终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，若满足跳转至步骤(7)，否则跳转至步骤(6)：
具体地，若拜访网络支持VoNR能力、支持EPS FB能力，终端支持VoNR能力和EPS FB能力中的至少一种，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络支持VoNR能力、支持EPS FB能力，终端不支持VoNR能力和EPS FB能力且终端为非语音类终端，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络支持VoNR能力、但不支持EPS FB能力，终端支持VoNR能力，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络支持VoNR能力、但不支持EPS FB能力，终端不支持VoNR能力，但支持EPS FB能力，则判断终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络支持VoNR能力、但不支持EPS FB能力，终端不支持VoNR能力和EPS FB能力且终端为非语音类终端，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络不支持VoNR能力、但支持EPS FB能力，终端支持EPS FB能力，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络不支持VoNR能力、但支持EPS FB能力，终端支持VoNR能力，但不支持EPS FB能力，则判断终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络不支持VoNR能力、但支持EPS FB能力，终端不支持VoNR能力和EPS FB能力且终端为非语音类终端，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络不支持VoNR能力、不支持EPS FB能力，终端支持VoNR能力和EPS FB能力中的至少一种，则判断终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
具体地，若拜访网络不支持VoNR能力、不支持EPS FB能力，终 端不支持VoNR能力和EPS FB能力且终端为非语音类终端，则判断终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
(6)AMF下发注册接受(Registration accept)消息给5G终端，不携带EPLMN list。
(7)AMF下发注册接受(Registration accept)消息给5G终端，携带EPLMN list，以将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效PLMN。
本发明提供的EPLMN列表的设置方法、核心网设备及介质，首先获取终端的能力信息以及拜访网络的能力信息；然后根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；若所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端。由于本发明能够根据终端以及拜访网络的能力信息有区分性的下发EPLMN列表，因此能够保证在终端无法使用拜访网络的语音业务时，不通过重选或重定向漫游到拜访网络下，且能够减少终端频繁选网的操作，或者，能够保证终端在拜访网络下无法使用语音业务时，能够主动返回归属网络，解决了现有的EPLMN列表的设置方法不能针对终端以及拜访网络的能力信息有区分性的进行设置，容易导致终端移动到拜访网络后无法使用语音业务，或者当终端在拜访网络下无法使用语音业务时，无法主动返回归属网络的情形，严重影响了用户体验的问题。
实施例2：
如图3所示，本实施例提供一种核心网设备，用于执行上述EPLMN列表的设置方法，包括：
能力获取模块11，用于获取终端的能力信息以及拜访网络的能力信息；
条件判断模块12，与所述能力获取模块11连接，用于根据所述终 端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
列表下发处理模块13，与所述条件判断模块12连接，用于若所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端。
可选地，所述核心网设备还包括：
注册信息获取模块，用于接收所述终端的附着请求/注册请求，从所述终端的附着请求/注册请求中获取所述终端的注册信息；
漫游条件判断模块，用于根据所述注册信息判断所述终端是否满足核心网漫游条件；
所述能力获取模块11具体用于：
若所述终端满足核心网漫游条件，则获取所述终端的能力信息以及拜访网络的能力信息。
可选地，所述注册信息包括：所述终端的位置信息、和/或国际移动用户识别码IMSI、和/或国际移动设备识别码IMEI、和/或国际移动用户综合业务数字网MSISDN；
所述漫游条件判断模块具体用于：
根据所述终端的位置信息、和/或IMSI、和/或IMEI、和/或MSISDN判断所述终端是否满足核心网漫游条件。
可选地，所述能力获取模块11包括：
终端能力获取单元，用于获取所述终端的新空口语音VoNR能力和/或演进分组电路域回落EPS FB能力。
可选地，所述终端能力获取单元包括：
第一发送单元，用于向无线网设备发送第一请求消息，所述第一请求消息用于请求获取所述终端的VoNR能力；
第一接收单元，用于接收所述无线网设备基于所述第一请求消息发送的第一响应消息，所述第一响应消息携带VoNR能力字段；
第一获取单元，用于根据所述VoNR能力字段的值获取所述终端的VoNR能力，其中，若所述VoNR能力字段的值为支持则表示所述终端 具有VoNR能力且处于开启状态，若所述VoNR能力字段的值为不支持则表示所述终端不具有VoNR能力或者具备VoNR能力但所述VoNR能力处于关闭状态。
可选地，所述第一发送单元具体用于：
向所述无线网设备发送用户终端设备UE无线能力匹配请求消息或UE无线能力检查请求消息；
所述第一接收单元具体用于：
接收所述无线网设备基于所述UE无线能力匹配请求消息发送的UE无线能力匹配响应消息；或者，
接收所述无线网设备基于所述UE无线能力检查请求消息发送的UE无线能力检查响应消息。
可选地，所述终端能力获取单元包括：
第二接收单元，用于接收无线网设备发送的UE无线能力信息指示消息；
解析获取单元，用于对所述UE无线能力信息指示消息进行解析，获取所述终端的VoNR能力。
可选地，所述条件判断模块12具体用于：
根据所述终端的VoNR能力和/或EPS FB能力以及拜访网络的VoNR能力和EPS FB能力，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
可选地，所述条件判断模块12具体根据以下至少之一判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件：
若所述拜访网络支持VoNR能力、支持EPS FB能力，所述终端支持VoNR能力和EPS FB能力中的至少一种，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终端支持VoNR能力，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终端不支持VoNR能力，但支持EPS FB能力，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端支持EPS FB能力，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端支持VoNR能力，但不支持EPS FB能力，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、不支持EPS FB能力，所述终端支持VoNR能力和EPS FB能力中的至少一种，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
若所述拜访网络不支持VoNR能力、不支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
可选地，所述终端能力获取单元包括：
更新消息接收单元，用于接收终端发送的跟踪区更新消息或移动注册更新消息，所述跟踪区更新消息或移动注册更新消息携带所述终端的 VoNR能力；
VoNR获取单元，用于从所述跟踪区更新消息或移动注册更新消息中获取所述终端的VoNR能力。
可选地，所述列表下发处理模块13包括：
第一下发单元，用于若所述核心网设备为归属网络核心网设备，则在EPLMN列表中携带所述拜访网络的漫游PLMN并发送给所述终端；
第二下发单元，用于若所述核心网设备为拜访网络核心网设备，则在EPLMN列表中携带所述归属网络的归属PLMN并发送给所述终端。
可选地，所述列表下发处理模块13包括：
消息发送单元，用于通过附着接受消息/注册接受消息向所述终端发送携带有所述拜访网络的漫游PLMN或归属网络的归属PLMN的EPLMN列表；或者，
通过跟踪区更新接受消息/移动注册更新接受消息向所述终端发送携带有所述拜访网络的漫游PLMN或归属网络的归属PLMN的EPLMN列表。
可选地，所述核心网设备还包括：
第一处理模块，用于若所述核心网设备为归属网络核心网设备且所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则不向所述终端发送EPLMN列表，或者向所述终端发送没有携带所述拜访网络的漫游PLMN的EPLMN列表。
可选地，所述核心网设备还包括：
第二处理模块，用于若所述核心网设备为拜访网络核心网设备且所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则拒绝所述终端接入，并向所述终端发送携带有拒绝原因值的附着失败消息/注册失败消息，或者向所述终端发送携带有拒绝原因值的跟踪区更新失败消息/移动注册更新失败消息。
实施例3：
参考图4，本实施例提供一种核心网设备，包括存储器21和处理器22，存储器21中存储有计算机程序，处理器22被设置为运行所述计算 机程序以执行实施例1中的EPLMN列表的设置方法。
其中，存储器21与处理器22连接，存储器21可采用闪存或只读存储器或其他存储器，处理器22可采用中央处理器或单片机。
实施例4：
本实施例提供一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现上述实施例1中的EPLMN列表的设置方法。
该计算机可读存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、计算机程序模块或其他数据)的任何方法或技术中实施的易失性或非易失性、可移除或不可移除的介质。计算机可读存储介质包括但不限于RAM(Random Access Memory，随机存取存储器)，ROM(Read-Only Memory，只读存储器)，EEPROM(Electrically Erasable Programmable read only memory，带电可擦可编程只读存储器)、闪存或其他存储器技术、CD-ROM(Compact Disc Read-Only Memory，光盘只读存储器)，数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。
综上所述，本发明实施例提供的核心网设备及介质，首先获取终端的能力信息以及拜访网络的能力信息；然后根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；若所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端。由于本发明能够根据终端以及拜访网络的能力信息有区分性的下发EPLMN列表，因此能够保证在终端无法使用拜访网络的语音业务时，不通过重选或重定向漫游到拜访网络下，且能够减少终端频繁选网的操作，或者，能够保证终端在拜访网络下无法使用语音业务时，能够主动返回归属网络，解决了现有的EPLMN列表的设置方法不能针对终端以及拜访网络的能力信息有区分性的进行设置，容 易导致终端移动到拜访网络后无法使用语音业务，或者当终端在拜访网络下无法使用语音业务时，无法主动返回归属网络的情形，严重影响了用户体验的问题。
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。

Claims (17)

  1. 一种对等公用陆地移动网EPLMN列表的设置方法，其特征在于，应用于核心网设备，所述方法包括：
    获取终端的能力信息以及拜访网络的能力信息；
    根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    若所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端。
  2. 根据权利要求1所述的EPLMN列表的设置方法，其特征在于，所述获取终端的能力信息之前，所述方法还包括：
    接收所述终端的附着请求/注册请求，从所述终端的附着请求/注册请求中获取所述终端的注册信息；
    根据所述注册信息判断所述终端是否满足核心网漫游条件；
    所述获取终端的能力信息以及拜访网络的能力信息，具体包括：
    若所述终端满足核心网漫游条件，则获取所述终端的能力信息以及拜访网络的能力信息。
  3. 根据权利要求2所述的EPLMN列表的设置方法，其特征在于，所述注册信息包括：所述终端的位置信息、和/或国际移动用户识别码IMSI、和/或国际移动设备识别码IMEI、和/或国际移动用户综合业务数字网MSISDN；
    所述根据所述注册信息判断所述终端是否满足核心网漫游条件，具体包括：
    根据所述终端的位置信息、和/或IMSI、和/或IMEI、和/或MSISDN判断所述终端是否满足核心网漫游条件。
  4. 根据权利要求1所述的EPLMN列表的设置方法，其特征在于，所述获取所述终端的能力信息，具体包括：
    获取所述终端的新空口语音VoNR能力和/或演进分组电路域回落EPS FB能力。
  5. 根据权利要求4所述的EPLMN列表的设置方法，其特征在于，获取所述终端的VoNR能力，具体包括：
    向无线网设备发送第一请求消息，所述第一请求消息用于请求获取所述终端的VoNR能力；
    接收所述无线网设备基于所述第一请求消息发送的第一响应消息，所述第一响应消息携带VoNR能力字段；
    根据所述VoNR能力字段的值获取所述终端的VoNR能力，其中，若所述VoNR能力字段的值为支持则表示所述终端具有VoNR能力且处于开启状态，若所述VoNR能力字段的值为不支持则表示所述终端不具有VoNR能力或者具备VoNR能力但所述VoNR能力处于关闭状态。
  6. 根据权利要求5所述的EPLMN列表的设置方法，其特征在于，所述向无线网设备发送第一请求消息，具体包括：
    向所述无线网设备发送用户终端设备UE无线能力匹配请求消息或UE无线能力检查请求消息；
    所述接收所述无线网设备基于所述第一请求消息发送的第一响应消息，具体包括：
    接收所述无线网设备基于所述UE无线能力匹配请求消息发送的UE无线能力匹配响应消息；或者，
    接收所述无线网设备基于所述UE无线能力检查请求消息发送的UE无线能力检查响应消息。
  7. 根据权利要求4所述的EPLMN列表的设置方法，其特征在于，获取所述终端的VoNR能力，具体包括：
    接收无线网设备发送的UE无线能力信息指示消息；
    对所述UE无线能力信息指示消息进行解析，获取所述终端的VoNR能力。
  8. 根据权利要求4所述的EPLMN列表的设置方法，其特征在于，所述根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，具体包括：
    根据所述终端的VoNR能力和/或EPS FB能力以及拜访网络的VoNR能力和EPS FB能力，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
  9. 根据权利要求8所述的EPLMN列表的设置方法，其特征在于，所述根据所述终端的VoNR能力和/或EPS FB能力以及拜访网络的VoNR能力和EPS FB能力，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，具体包括以下至少之一：
    若所述拜访网络支持VoNR能力、支持EPS FB能力，所述终端支持VoNR能力和EPS FB能力中的至少一种，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    若所述拜访网络支持VoNR能力、支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终端支持VoNR能力，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终端不支持VoNR能力，但支持EPS FB能力，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    若所述拜访网络支持VoNR能力、但不支持EPS FB能力，所述终 端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端支持EPS FB能力，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端支持VoNR能力，但不支持EPS FB能力，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    若所述拜访网络不支持VoNR能力、但支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    若所述拜访网络不支持VoNR能力、不支持EPS FB能力，所述终端支持VoNR能力和EPS FB能力中的至少一种，则判断所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    若所述拜访网络不支持VoNR能力、不支持EPS FB能力，所述终端不支持VoNR能力和EPS FB能力且所述终端为非语音类终端，则判断所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件。
  10. 根据权利要求4所述的EPLMN列表的设置方法，其特征在于，获取所述终端的VoNR能力，具体包括：
    接收终端发送的跟踪区更新消息或移动注册更新消息，所述跟踪区更新消息或移动注册更新消息携带所述终端的VoNR能力；
    从所述跟踪区更新消息或移动注册更新消息中获取所述终端的VoNR能力。
  11. 根据权利要求1所述的EPLMN列表的设置方法，其特征在于，所述在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归 属PLMN并发送给所述终端，具体包括：
    若所述核心网设备为归属网络核心网设备，则在EPLMN列表中携带所述拜访网络的漫游PLMN并发送给所述终端；
    若所述核心网设备为拜访网络核心网设备，则在EPLMN列表中携带所述归属网络的归属PLMN并发送给所述终端。
  12. 根据权利要求1所述的EPLMN列表的设置方法，其特征在于，所述在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端，具体包括：
    通过附着接受消息/注册接受消息向所述终端发送携带有所述拜访网络的漫游PLMN或归属网络的归属PLMN的EPLMN列表；或者，
    通过跟踪区更新接受消息/移动注册更新接受消息向所述终端发送携带有所述拜访网络的漫游PLMN或归属网络的归属PLMN的EPLMN列表。
  13. 根据权利要求1所述的EPLMN列表的设置方法，其特征在于，所述方法还包括：
    若所述核心网设备为归属网络核心网设备且所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则不向所述终端发送EPLMN列表，或者向所述终端发送没有携带所述拜访网络的漫游PLMN的EPLMN列表。
  14. 根据权利要求1所述的EPLMN列表的设置方法，其特征在于，所述方法还包括：
    若所述核心网设备为拜访网络核心网设备且所述终端不满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则拒绝所述终端接入，并向所述终端发送携带有拒绝原因值的附着失败消息/注册失败消息，或者向所述终端发送携带有拒绝原因值的跟踪区更新失败消息/移动注册更新失败消息。
  15. 一种核心网设备，其特征在于，包括：
    能力获取模块，用于获取终端的能力信息以及拜访网络的能力信息；
    条件判断模块，与所述能力获取模块连接，用于根据所述终端的能力信息以及拜访网络的能力信息，判断所述终端是否满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件；
    列表下发处理模块，与所述条件判断模块连接，用于若所述终端满足将拜访网络的漫游PLMN和归属网络的归属PLMN设置为等效的条件，则在EPLMN列表中携带所述拜访网络的漫游PLMN或归属网络的归属PLMN并发送给所述终端。
  16. 一种核心网设备，其特征在于，包括存储器和处理器，所述存储器中存储有计算机程序，所述处理器被设置为运行所述计算机程序以实现如权利要求1-14中任一项所述的EPLMN列表的设置方法。
  17. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1-14中任一项所述的EPLMN列表的设置方法。
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