WO2019075741A1 - 一种切换业务承载网络的方法、设备及计算机存储介质 - Google Patents

一种切换业务承载网络的方法、设备及计算机存储介质 Download PDF

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Publication number
WO2019075741A1
WO2019075741A1 PCT/CN2017/107089 CN2017107089W WO2019075741A1 WO 2019075741 A1 WO2019075741 A1 WO 2019075741A1 CN 2017107089 W CN2017107089 W CN 2017107089W WO 2019075741 A1 WO2019075741 A1 WO 2019075741A1
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Prior art keywords
service
indication information
network
support capability
capability indication
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PCT/CN2017/107089
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English (en)
French (fr)
Inventor
唐海
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Oppo广东移动通信有限公司
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Priority to CN201780091930.4A priority Critical patent/CN110741678B/zh
Priority to PCT/CN2017/107089 priority patent/WO2019075741A1/zh
Priority to EP17928905.3A priority patent/EP3661263B1/en
Publication of WO2019075741A1 publication Critical patent/WO2019075741A1/zh
Priority to US16/842,901 priority patent/US20200252849A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0066Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/12Reselecting a serving backbone network switching or routing node
    • H04W36/125Reselecting a serving backbone network switching or routing node involving different types of service backbones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/14Reselecting a network or an air interface
    • H04W36/144Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1443Reselecting a network or an air interface over a different radio air interface technology between licensed networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/02Processing 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
    • H04W8/08Mobility data transfer
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/22Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24Transfer of terminal data

Definitions

  • the embodiments of the present invention relate to the field of wireless communications technologies, and in particular, to a method, a device, and a computer storage medium for switching a service bearer network.
  • 5G wireless access is called New Radio, referred to as NR.
  • 5G has the advantages of high data transmission rate, massive number of data connections and low data transmission delay.
  • 5G networks In the initial stage of the construction of 5G networks, 5G networks can only support data services and cannot support voice services, which makes deployment of 5G networks difficult.
  • the embodiment of the present invention is to provide a method, a device, and a computer storage medium for switching a service bearer network; and to fall back to a communication network having a voice service under the condition that the voice service cannot be supported in the initial stage of the 5G network construction, So as to avoid the difficulty of 5G network deployment.
  • an embodiment of the present invention provides a method for switching a service bearer network, where the method is applied to a session management function SMF in a 5G network architecture, where the method includes:
  • an embodiment of the present invention provides a method for switching a service bearer network, where the method is applied to a session management function AMF in a 5G network architecture, where the method includes:
  • an embodiment of the present invention provides a method for switching a service bearer network, where the method is applied to a mobility management entity MME in a 4G network architecture, where the method includes:
  • the service support capability indication information of the UE is indication information indicating that the UE needs voice service and only supports circuit domain service
  • the circuit domain fallback CSFB process is performed.
  • an embodiment of the present invention provides a network device, including: a first receiving part, an obtaining part, and a first sending part;
  • the first receiving part is configured to receive a request message for establishing a service-specific bearer or a handover indication for a service-specific bearer for the user equipment UE, where the handover indication of the service-specific bearer is used to indicate that the service is dedicated
  • the bearer is switched from 5G to 4G or 2/3G, or used to indicate that the entire service system is switched from 5G to 4G or 2/3G;
  • the acquiring part is configured to acquire the service support capability indication information of the UE from the pre-stored service support capability indication information about the UE;
  • the first sending part is configured to be based on the service support capability indication information of the UE, Sending a system handover request message to the request information or the handover indication.
  • an embodiment of the present invention provides a network device, where the device includes: a second receiving part and a second sending part;
  • the second receiving part is configured to receive service support capability indication information of the UE sent by the UE and/or the historical AMF in a registration process of the UE; or, in the Receiving, by the UE, the service support capability indication information of the UE that is sent by the UE;
  • the second sending part is configured to send the service support capability indication information of the UE to the session management function SMF, where the service support capability indication information of the UE is used by the SMF to establish a service specific for the UE System switching when carrying.
  • an embodiment of the present invention provides a network device, where the device includes: a third receiving part, an executing part;
  • the third receiving part is configured to receive service support capability indication information of the user equipment UE that is sent by the session management function AMF in the 5G network architecture;
  • the executing part is configured to perform a circuit domain fallback CSFB process when the service support capability indication information of the UE is indication information indicating that the UE needs voice service and only supports circuit domain service.
  • an embodiment of the present invention provides a network device, where the device includes: a first network interface, a first memory, and a first processor;
  • the first network interface is configured to receive and send signals during the process of transmitting and receiving information with other external network elements;
  • the first memory is configured to store a computer program capable of running on the first processor
  • the first processor is configured to perform the steps of the method of the first aspect when the computer program is run.
  • an embodiment of the present invention provides a network device, where the device package The second network interface, the second memory and the second processor; wherein
  • the second network interface is configured to receive and send signals during the process of transmitting and receiving information with other external network elements
  • the second memory is configured to store a computer program capable of running on the second processor
  • the second processor is configured to perform the steps of the method of the second aspect when the computer program is run.
  • a ninth aspect, the embodiment of the present invention provides a network device, where the device includes: a third network interface, a third memory, and a third processor;
  • the third network interface is configured to receive and send signals during the process of transmitting and receiving information with other external network elements;
  • the third memory is configured to store a computer program capable of running on the third processor
  • the third processor is configured to perform the steps of the method of the third aspect when the computer program is run.
  • an embodiment of the present invention provides a computer readable medium storing a program for switching a service bearer network, where the program of the handover service bearer network is implemented by at least one processor to implement the first Aspects of the method of the second aspect or the third aspect.
  • the embodiment of the present invention provides a method, a device, and a computer storage medium for switching a service bearer network.
  • the SMF can obtain the service support capability indication information of the UE in advance, and then, according to the service support capability indication of the UE, when the UE performs the voice service.
  • the information determines whether the bearer of the voice service is dropped from the 5G network to the 4G network or from the 5G network to the 2G or 3G network, thereby determining whether to send the first fallback indication information or the second fallback indication information.
  • the UE does not perceive the fallback of the service bearer network in the network side, and the UE does not need to actively determine the initiation mode of the voice service, thereby reducing the complexity of customization and deployment for the UE, and the network side can be based on the UE.
  • the support capability of the service is combined with the service support capability of the network side to determine whether to trigger the fallback to ensure the successful establishment of the service connection.
  • FIG. 1 is a schematic diagram of an atypical 5G basic network architecture
  • FIG. 2 is a schematic flowchart of a method for switching a service bearer network according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of another method for switching a service bearer network according to an embodiment of the present disclosure
  • FIG. 4 is a schematic flowchart of still another method for switching a service bearer network according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of a process of executing a CSFB according to an embodiment of the present invention
  • FIG. 6 is a schematic flowchart of another process of executing a CSFB according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart diagram of a specific example 1 according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic flowchart diagram of a specific example 2 according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic flowchart diagram of a specific example 3 according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic flowchart diagram of a specific example 4 according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic flowchart of a network fallback when a MO UE performs a voice service according to an embodiment of the present disclosure
  • FIG. 12 is a schematic flowchart of a network fallback when a MT UE performs a voice service according to an embodiment of the present disclosure
  • FIG. 13 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a specific hardware of a network device according to an embodiment of the present disclosure.
  • 15 is a schematic structural diagram of another network device according to an embodiment of the present invention.
  • FIG. 16 is a schematic structural diagram of another hardware of another network device according to an embodiment of the present disclosure.
  • FIG. 17 is a schematic structural diagram of still another network device according to an embodiment of the present disclosure.
  • FIG. 18 is a schematic diagram of a specific hardware structure of another network device according to an embodiment of the present invention.
  • an atypical 5G basic network architecture called a Service-Based Architecture (SBA) is shown.
  • the user equipment UE, User Equipment
  • AMF Core Access and Moblity Management
  • R wireless access network
  • R Radio Access Network
  • the user equipment UE, User Equipment
  • MME mobility management entity
  • EMM EPS Mobility Management
  • the Authentication Service Function is similar to the MME's robust function in the LTE system, enabling two-way authentication of the UE and supporting a unified authentication framework.
  • the User plane function is similar to the integration of the serving gateway S-GW and the PDN gateway P-GW in the LTE system, and is connected to the data network DataNetwork.
  • the Session Management Function is similar to the EPS session management ESM function in the LTE system, and is mainly for managing, establishing, modifying, and releasing sessions. It can be seen that the function set of AUSF, AMF and SMF is similar to the MME in the LTE system. In addition, the structure shown in FIG.
  • NEF Network Exposure Function
  • NRF NRF
  • PCF Policy Control Function
  • UDM Unified Data Management
  • AF Application Function
  • NEF is used to demonstrate some capabilities of network functions to the outside, such as monitoring capabilities, provisioning capabilities, and policy or charging capabilities
  • NRF can support service discovery.
  • Functionality; PCF supports a unified policy framework for managing network behavior;
  • UDM includes Application Front End (FE) and User Data Warehouse (UDR), The FE can access the subscription user information in the UDR.
  • the function of the UDM is similar to the HSS in the LTE system.
  • the UDR provides a subscription data storage service, the application front end FE provides data-based application logic, and the AF uses the application service.
  • the terminal needs to register to the 5G network through the registration process before the 5G service can be performed.
  • the registration process of the 5G registration process is different from that of the Long Term Evolution (LTE) system.
  • the registration process does not include the session establishment process.
  • the AMF will associate session-related information, such as non-independent (NSA, Non). Stand alone)
  • the information is sent to the SMF through the N11_Request message of the N11 interface, and then the SMF decides whether to trigger the session establishment process.
  • a method for switching a service bearer network is shown.
  • the method may be applied to a session management function (SMF) in a 5G network architecture, where the method includes:
  • S201 Receive a request message for establishing a service-specific bearer for a UE or a handover indication for a service-specific bearer.
  • the service specific bearer switching indication is used to indicate that the service dedicated bearer needs to be switched from 5G to 4G or 2/3G, or is used to indicate that the entire service system is switched from 5G to 4G or 2/. 3G;
  • S202 Obtain the service support capability indication information of the UE from the pre-stored indication information about the UE service support capability.
  • S203 Send a service bearer request message for the request information or the handover indication, based on the service support capability indication information of the UE.
  • the VoIP (Voice over Internet Protocol) service is carried in the LTE network architecture, and the circuit domain service is carried in the 2G or 3G network.
  • the service type of the service needs to be determined. Therefore, the service support capability of the UE needs to be known first. Therefore, the voice service is used as an example.
  • the service support capability indication information of the UE may include: indication information indicating that the UE needs voice service and only supports VoIP service, and Instructing information indicating that the UE needs voice service and only supporting circuit domain services, indicating information indicating that the UE needs voice service and supporting network telephony VoIP service and circuit domain service, or indicating that the UE does not need The indication information of the voice service or the network indication information carried in the emergency call service.
  • the service support capability indication information of the foregoing five types of UEs may be represented by setting specific parameter values. For example, when set to “0”, it indicates that the UE needs voice service, and only supports VoIP calls (including VoNR, When set to “1”, it means that the UE needs voice service, and only supports circuit domain voice (including CSFB and 3G CS domain call); when set to "2”, it indicates that the UE needs voice service. And support VoIP and circuit domain voice at the same time; when set to "3", it means that the UE does not need voice service; and the network indication information for carrying the emergency call service can be used to indicate that the network for carrying the emergency call service is 5G. Network or 4G network or 2/3G network.
  • the parameter value when the parameter value is set to "4", it means that the emergency call service for the UE is carried over the 5G network; when the parameter value is set to "5", it indicates the emergency for the UE. The call service is carried over the 4G network. When the parameter value is set to "6", it indicates that the emergency call service for the UE is carried over the 2/3G network.
  • the destination network type that is dropped from the 5G network can be determined according to the service support capability indication information of the UE, for example, Falling back from the 5G network to the 4G network; or falling back from the 5G network to 2G or 3G; or carrying an emergency call through the 4G network, or carrying an emergency call through the 2/3G network.
  • the network side can actively determine whether to trigger the 2G or 3G or 4G fallback of the UE. Therefore, the voice service of the UE can be established normally under the 5G network.
  • the voice service is used as an atypical example to describe the technical solution of the embodiment. It can be understood that those skilled in the art can use the technology of the embodiment of the present invention. The solution is applied to other services under the guidance of the voice service example, and details are not described herein.
  • the core access and mobility management AMF to the next generation wireless
  • the first fallback indication information is sent by the access network (NG-RAN, Next Generation RAN), where the first fallback indication information is used to indicate that the service dedicated bearer is switched from the 5G network to the 4G network or the service system is 5G switches to 4G;
  • the UE When the service support capability indication information of the UE is used to indicate that the UE only supports the circuit domain service or the network indication information that is carried for the emergency call service indicates that the emergency call service is carried through the 2/3G network, the UE is sent to the UE through the AMF. Sending the second fallback indication information, where the second fallback indication information is used to indicate that the service dedicated bearer is dropped from the 5G network to the 2G or 3G network or the service system is switched from 5G to 2G or 3G.
  • the pre-stored indication information about the UE service support capability may be acquired by the SMF during the UE registration or session establishment process. Therefore, in a first possible implementation, before the receiving, by the user equipment UE, a request message for establishing a service-specific bearer or a handover indication for a service-specific bearer, the method further includes:
  • the service support capability indication information of the UE that is sent by the AMF is received.
  • the receiving, by the AMF, the service support capability indication information of the UE including:
  • the method before the receiving, by the user equipment UE, a request message for establishing a service-specific bearer or a handover indication for a service-specific bearer, the method further includes:
  • the service support capability indication information of the UE sent by the AMF and/or the UDM is received.
  • the receiving the service support capability indication information of the UE sent by the AMF and/or the UDM including:
  • the SMF can determine the voice service according to the service support capability indication information of the UE when the voice service is used as an example. Whether the bearer is dropped back to the 4G network by the 5G network or dropped from the 5G network to the 2G or 3G network, thereby determining whether to send the first fallback indication information or the second fallback indication information.
  • the UE may not be aware of the fallback of the service bearer network in the network side, and the UE does not need to actively determine the initiation mode of the voice service, thereby reducing the complexity of customization and deployment for the UE, and the network side may support the service according to the UE.
  • the capability combines with the service support capabilities of the network side to determine whether to trigger a fallback to ensure the successful establishment of the service connection.
  • the embodiment of the present invention provides a method for switching a service bearer network, where the method is applied to a session management function AMF in a 5G network architecture, and the method is Includes:
  • S301 Receive, in the registration process of the UE, the service support capability indication information of the UE that is sent by the UE and/or the historical AMF; or, during the session establishment process for the UE, receive The service support capability indication information of the UE sent by the UE;
  • S302 Send the service support capability indication information of the UE to the session management function SMF;
  • the service support capability indication information of the UE is used by the SMF to perform system handover when establishing a service-specific bearer for the UE.
  • the service support capability indication information of the UE includes: indication information indicating that the UE needs voice service and only supports VoIP service, and is used to indicate the The UE needs the voice service and only supports the indication information of the circuit domain service, the indication information for indicating that the UE needs the voice service, and supports the network telephone VoIP service and the circuit domain service, or the indication for indicating that the UE does not need the voice service. Information, or network indication information carried for emergency call services.
  • the receiving the service support capability indication information of the UE sent by the UE and/or the historical AMF in the registration process of the UE may include:
  • the current AMF of the technical solution shown in FIG. 3 sends an information request Information Request message to the historical AMF.
  • the historical AMF will indicate the previously saved service support capability of the UE.
  • the information is carried in the information response Information Response message is returned to the current AMF.
  • the sending the service support capability indication information of the UE to the session management function SMF includes:
  • the service support capability indication information of the UE is sent to the session management function SMF, including:
  • the service support capability indication information of the UE including:
  • PDU Session Establishment Request message carries the service support capability indication information of the UE.
  • the service support capability indication information of the UE is sent to the session management function SMF, including:
  • a session management request SM Request message carrying the service support capability indication information of the UE is sent to the SMF.
  • the SMF can perform system switching when the service-specific bearer is established for the UE according to the received service support capability indication information of the UE, and the SMF specifically determines the system handover process, as shown in the first embodiment.
  • the SMF Receiving the first fallback indication information sent by the SMF, and sending the first fallback indication information to the next generation radio access network NG-RAN; wherein the first fallback indication information is used to indicate the service dedicated bearer Falling back to the 4G network from the 5G network or by the 5G Switch to 4G;
  • the second fallback indication information is used to indicate that the service dedicated bearer is dropped from the 5G network to the 2G network.
  • the method further includes:
  • the service support capability indication information of the UE includes: indication information indicating that the UE needs voice service and only supports VoIP service, or is used to indicate the UE.
  • the indication information that requires the voice service and supports the VoIP service of the VoIP service and the circuit domain service, or the network indication information carried in the emergency call service indicates that the emergency call service is carried over the 4G network;
  • the service support capability indication information of the UE is indication information indicating that the UE needs voice service and only supports circuit domain service, or a network that carries the bearer for emergency call service.
  • the indication information indicates that the emergency call service is carried over the 2/3G network.
  • the MME can perform the service bearer after switching from the 5G network to the 4G network.
  • the process of carrying the service bearer by the MME refer to the following third embodiment.
  • an embodiment of the present invention provides a method for switching a service bearer network, where the method is applied to a mobility management entity MME in a 4G network architecture, and the method is include:
  • S401 Receive service support capability indication information of the user equipment UE that is sent by the session management function AMF in the 5G network architecture.
  • a specific implementation manner of S401 may include: receiving service support carried by the AMF and carrying the UE during handover of the Handover to the 4G network by the 5G network.
  • the relocation request of the capability indication information is Relocation Request.
  • the performing the CSFB process includes:
  • S4021A Send a paging Paging request or notify a Notification request to the UE, where the paging request or the notification request is used to instruct the UE to perform the CSFB procedure;
  • S4022A Send a service bearer setup failure response for the network telephony VoIP to the IP Multimedia Subsystem IMS.
  • the CSFB process is triggered by the MME.
  • the performing the CSFB process includes:
  • S4021B Send a service bearer setup request for network telephony VoIP to an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN);
  • E-UTRAN Evolved UMTS Terrestrial Radio Access Network
  • the E-UTRAN sends a bearer setup reject message to the IMS according to a current network environment.
  • S4023B The IMS sends a notification message about the CSFB to the UE by using a SIP message, where the notification message of the CSFB is used to notify the UE to perform the CSFB procedure.
  • the CSFB process is triggered by the E-UTRAN. It should be noted that, the E-UTRAN sends a bearer setup reject message to the IMS according to the current network environment, which may include:
  • a bearer setup reject message is sent to the IMS; for example, the evolved node (eNodeB) in the E-UTRAN has no phase installed
  • the license is closed, so that the bearer establishment request for the VoIP service of the network phone cannot be identified;
  • the E-UTRAN when the network environment of the E-UTRAN cannot meet the network environment required for establishing the VoIP service bearer, sending a bearer setup reject message to the IMS; for example, the E-UTRAN network is congested to fail to satisfy the VoIP service bearer. Establish the required network environment;
  • the UE when the UE is in the E-UTRAN range and the signal strength of the UE is lower than a preset strength threshold, sending a bearer setup reject message to the IMS; for example, the UE is in the E-UTRAN
  • the weak coverage makes the eNodeB unable to establish a VoIP service bearer for the UE.
  • the present embodiment details the technical solutions of the foregoing three embodiments by the following specific examples.
  • the voice service is used as an atypical example to describe the technical solution. It can be understood that the technical solution of the embodiment of the present invention can be applied to other services under the guidance of the voice service example. The embodiment will not be described here.
  • the specific example 1 and the specific example 2 are used to describe the process of the SMF obtaining the service support capability indication information of the UE. Then, based on the technical solutions of the specific example 1 and the specific example 2, the embodiment passes the specific example 3. The process of switching the service bearer network in the voice service process of the UE is described. Finally, the process of triggering the CSFB after the voice service falls back from the 5G network to the 4G network is illustrated by the specific example four.
  • the SMF may obtain the service support capability indication information of the UE during the UE registration process, and the specific process is shown in FIG. 7. It should be noted that the process of the technical solution shown in FIG. 7 and the third generation partner program are shown. The registration procedure described in section 4.2.2.2.2 of the Technical Specification (TS, Technical Specification) 23.502 of the 3GPP (3rd Generation Partnership Project) is the same.
  • the AMF learns the service support capability indication information of the UE.
  • the specific process is as follows:
  • the UE encapsulates its own service support capability indication information into the NAS and carries it in the Registration Request message. Subsequently, the UE sends a Registration Request message to the (R)AN. Then, the (R)AN performs AMF selection on the AMF for AMF selection, and then The registration request message is sent to the selected AMF, which is referred to as a new AMF (new AMF) in this specific example; therefore, the above steps implement the new AMF to obtain the service support capability indication information of the UE from the UE;
  • the new AMF may also send an information request Information Request to the historical AMF (old AMF), and receive an information response Information Response transmitted by the old AMF carrying the service support capability indication information of the UE.
  • the new AMF cannot obtain an alternative solution for the service support capability indication information from the UE.
  • the new AMF can obtain the service support capability indication information from the UE, and can also learn the UE's service support capability indication information from the old AMF, the new AMF can consider that the service support capability indication information obtained from the UE has a higher Priority, thereby ignoring the service support capability indication information of the UE learned from the old AMF.
  • the foregoing process describes a specific process in which the AMF learns the service support capability indication information of the UE. It can be understood that the foregoing process corresponds to steps 1 to 5 in FIG. 7.
  • the new AMF sends an acknowledgment request Identity Request to the UE.
  • the new AMF After receiving the acknowledgment response Identity Response sent by the UE, the new AMF sequentially performs the AUSF selection selection, the UDM selection selection, and the PCF selection selection, and When each selection is completed, the corresponding authentication Authenticatio, the upgrade update step, and the corresponding information request are respectively performed.
  • the specific steps are as shown in step 6 to step 17 in FIG. 7. It should be noted that the specific meanings and implementation manners of steps 6 to 17 can be referred to the corresponding contents in 3GPP TS 23.502 Clause 4.2.2.2.2, and details are not described herein again. .
  • the new AMF may indicate the service support capability indication information of the UE.
  • the encapsulation is sent to the SMF in the N11_Request message, so that the SMF learns the service support capability indication information of the UE, and the process corresponds to step 18 in FIG.
  • the SMF sends N11_Response to the new AMF, as in step 19.
  • the subsequent steps of the UE registration process are completed, for example, steps 20 to 23. It should be noted that the specific meanings and implementation manners of the steps 19 to 23 can be referred to the corresponding contents in 3GPP TS 23.502 Clause 4.2.2.2.2, and details are not described herein again.
  • the SMF may obtain the service support capability indication information of the UE during the session establishment process of the UE.
  • the specific process is shown in FIG. 8. It should be noted that the process of the technical solution shown in FIG.
  • the session establishment process described in the section Clause 4.3.2.2.1 of the 23.502 version of the Technical Specification (TS, Technical Specification) of the 3GPP (3rd Generation Partnership Project) is the same.
  • the AMF obtains the service support capability indication information of the UE from the UE. Specifically, in step 1, the UE sends a PDU session establishment request PDU Session Establishment Request carrying the service support capability indication information of the UE to the AMF. Then, the AMF completes according to step 2. After the SMF selects the SMF selection, the PDU Session Establishment Request is sent to the selected SMF by using the session management request SM Request, as in step 3, so that the SMF obtains the service support capability indication information of the UE.
  • the SMF may also send a subscription data request to the UDM, such as step 4a. Then, the UDM encapsulates the service support capability indication information of the UE in the subscription data response message to the SMf, as shown in step 4b. Therefore, the SMF can also obtain the service support capability indication information of the UE.
  • the SMF obtains the service support capability of the UE.
  • the information is displayed, so that the SMF can switch the network carrying the voice service in the voice service process of the UE based on the service support capability indication information of the UE.
  • the specific process is shown in Figure 9:
  • Step 1 The MO UE sends a Session Initiation Protocol (SIP) session for establishing VoIMS (Voice over IMS) to the IMS during the call process.
  • SIP Session Initiation Protocol
  • Step 2 The IMS sends a VoIMS setup request to the Policy and Charging Rules Function (PCRF) to request to establish a VoIMS dedicated bearer.
  • PCRF Policy and Charging Rules Function
  • Step 3 The PCRF sends a service bearer setup request to the SMF.
  • Step 4 The SMF determines the fall of the service network according to the service support capability indication information of the UE.
  • step 5a SMF Sending, to the AMF, a service bearer request for indicating that the 5G network falls back to the 4G network;
  • Step 6a The AMF sends the first fallback indication information to the NG-RAN; wherein the first fallback indication information is used to indicate the service dedicated bearer Falling back to the 4G network from the 5G network or switching the service system from 5G to 4G;
  • the SMF determines that the trigger is dropped from the 5G network to the 2G or 3G network, and then, as shown by the dotted line in FIG. 9, the step 5b: the SMF direction
  • the AMF sends a service bearer request message for indicating that the 5G network falls back to the 2G or 3G network
  • Step 6b The AMF sends the second fallback indication information to the UE, where the second fallback indication information is used to indicate the service dedicated bearer
  • the 5G network is dropped back to the 2G or 3G network to switch the service system from 5G to 2G or 3G.
  • the UE receives the SIP Invite message in step 1.
  • the IMS sends a VoIMS setup request to the PCRF, and the SMF determines the fallback of the service network. This specific example will not be described here.
  • the AMF may carry the service support capability indication information of the UE in the relocation request message sent to the MME in step 3, so that the MME according to the UE
  • the service support capability indication information determines whether the voice service of the UE is carried by the VoIP or the voice service of the UE that is dropped by the CSFB process to the circuit domain.
  • the MME can determine whether to trigger the CSFB process in the process of establishing the VoLTE bearer.
  • This specific example performs the CSFB process by using the UE as the MO UE and the MT UE. set forth.
  • the process of network fallback when the MO UE performs voice service may include:
  • Step 1 The UE sends a SIP Invite message to the IMS, where the message is used to request to establish a VoLTE call.
  • Step 2 The IMS sends a VoLTE establishment request to the PCRF to request the establishment of a VoLTE dedicated bearer.
  • Step 3 The PCRF sends a bearer establishment request to the SMF and the service or PDN gateway (S/P-GW, Server/PDN Gateway); the request is used to request to establish a VoLTE dedicated bearer;
  • Step 4a After receiving the bearer setup request, the SMF determines the fall of the service network.
  • the handover procedure Handover Procedure can be performed according to the procedure in the specific example four.
  • the MME may obtain the service support capability indication information of the UE from the AMF.
  • step 4b the S/P-GW sends a bearer setup to the MME. Request Bearer establishment request;
  • Step 5 The MME performs a CSFB process according to the service support capability indication information of the UE.
  • the MME can learn that the UE needs the voice service, and only supports the circuit domain service. Therefore, the CSFB process needs to be performed.
  • the CSFB process may or may not be triggered by the MME. Therefore, when the CSFB procedure is triggered by the MME, as shown in the dotted line frame of FIG.
  • step 6a transmitting, to the UE, a paging Paging request including a CSFB indication indicator or notifying a Notification request; wherein the CSFB indicator And used to instruct the UE to perform the CSFB process;
  • Step 7a Send a bearer setup failure response for the VoLTE service to the IP Multimedia Subsystem IMS.
  • the UE can perform the CSFB procedure Procedure according to the CSFB indicator.
  • step 6b the MME sends a bearer setup request for the VoIP service of the VoIP service to the E-UTRAN;
  • Step 7b The E-UTRAN sends a Bearer Establishment Reject message to the IMS according to the current network environment.
  • step 7b when the eNodeB in the E-UTRAN does not support the dedicated bearer setup, if the related license is not installed to identify the request, or when the eNodeB network is congested, the VoIP service bearer cannot be established.
  • E-UTRAN sends Bearer establishment Reject to IMS when the required network environment, or when the UE is in a weak coverage so that the eNodeB cannot establish the bearer for the UE
  • Step 8b The IMS sends a SIP response Response message including the CSFB indicator to the UE; as indicated by a dotted line frame, the CSFB indicator is used to instruct the UE to execute the CSFB procedure.
  • step 9 the UE can be based on The CSFB indicator executes the CSFB Procedure.
  • the process of network fallback when the MT UE performs voice service may include:
  • Step 1 The UE receives a SIP Invite message sent by the IMS, where the message is used to request to establish a VoLTE call.
  • Step 2 The IMS issues a VoLTE establishment to the PCRF;
  • Step 3 The PCRF sends a Bearer establishment request to the SMF and the S/P-GW;
  • Step 4 The S/P-GW sends a bearer establishment request to the MME.
  • the handover procedure Handover Procedure can be performed according to the procedure in the specific example four.
  • Step 5 The MME performs a CSFB process according to the service support capability indication information of the UE.
  • the CSFB process may or may not be triggered by the MME. Therefore, when the CSFB procedure is triggered by the MME, refer to the dotted line frame of FIG. 12, step 6a: transmitting a Paging request or a Notification request including the CSFB indicator to the UE; Step 7a: transmitting bearer establishment for the VoLTE service to the IMS Failure response. After the UE receives the Paging or Notification request, Step 11: The UE performs the CSFB Procedure.
  • step 6b the MME sends a Bearer setup request to the E-UTRAN;
  • Step 7b E-UTRAN sends a Bearer establishment Reject to the IMS according to the current network environment
  • the method further includes the step 8: the IMS sends a CSFB trigger message to the mobile switching center (MSC, Mobile Switching Center);
  • MSC Mobile Switching Center
  • Step 9 The MSC sends a Paging request to the MME.
  • Step 10 The MME sends a Paging/Notification request to the UE.
  • Step 11 The UE performs a CSFB Procedure.
  • FIG. 13 shows a composition of a network device 130 according to an embodiment of the present invention.
  • the network device 130 can implement the function of an SMF in a 5G network architecture.
  • the network device 130 can include: a first receiving portion 1301. a portion 1302 and a first transmitting portion 1303; wherein
  • the first receiving part 1301 is configured to receive a request message for establishing a service-specific bearer or a handover indication for a service-specific bearer for the user equipment UE, where the handover indication of the service-specific bearer is used to indicate that the service is to be used
  • the dedicated bearer is switched from 5G to 4G or 2/3G, or used to indicate that the entire service system is switched from 5G to 4G or 2/3G;
  • the obtaining part 1302 is configured to acquire the service support capability indication information of the UE from the pre-stored service support capability indication information about the UE;
  • the first sending part 1303 is configured to send a system switching request message for the request information or the handover indication based on the service support capability indication information of the UE.
  • the service support capability indication information of the UE includes: indication information indicating that the UE needs voice service and only supports VoIP service, and is used to indicate that the UE needs voice service and only The indication information for supporting the circuit domain service, the indication information for indicating that the UE needs the voice service, and the network telephone VoIP service and the circuit domain service, or the indication information for indicating that the UE does not need the voice service, or for the emergency call
  • the network indicates the information carried by the service.
  • the first sending part 1303 is configured to be used by the UE.
  • the service support capability indication information indicates that the UE supports the VoIP service or the network indication information carried in the emergency call service indicates that the emergency call service is carried over the 4G network, and the next generation radio access network NG-RAN is accessed through the access and mobility management AMF.
  • the service support capability indication information of the UE indicates that the UE only supports the circuit domain service or the network indication information that is carried for the emergency call service indicates that the emergency call service is carried through the 2/3G network
  • the first message is sent to the UE by using the AMF.
  • the second fallback indication information is used to indicate that the service dedicated bearer is dropped from the 5G network to the 2G or 3G network or the service system is switched from 5G to 2G or 3G.
  • the first receiving part 1301 is further configured to receive the service support capability indication information of the UE sent by the AMF during the registration process of the UE.
  • the first receiving part 1301 is configured to receive an N11-Request message that is sent by the AMF and carries the service support capability indication information of the UE.
  • the first receiving part 1301 is further configured to: receive, by the AMF and/or the unified data management UDM, the service of the UE in a session establishment process for the UE. Support capability indication information.
  • the first receiving part 1301 is configured to receive a session management request SM Request message that is sent by the AMF and that carries the service support capability indication information of the UE, and is configured from the SM Request message. Determining the service support capability indication information of the UE; and/or,
  • the “part” may be a partial circuit, a partial processor, a partial program or software, etc., of course, may be a unit, a module, or a non-modular.
  • each component in this embodiment may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software function module.
  • the integrated unit may be stored in a computer readable storage medium if it is implemented in the form of a software function module and is not sold or used as a stand-alone product.
  • the technical solution of the embodiment is essentially Said that the part contributing to the prior art or all or part of the technical solution can be embodied in the form of a software product stored in a storage medium, comprising a plurality of instructions for making a computer device (may It is a personal computer, a server, or a network device, etc. or a processor that performs all or part of the steps of the method described in this embodiment.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes.
  • the embodiment provides a computer readable medium storing a program for switching a service bearer network, where the program of the handover service bearer network is executed by at least one processor to implement the foregoing embodiment 1. The steps of the method.
  • a specific hardware structure of a network device 130 may be included, which may include: a first network interface 1401, a first memory 1402, and a first A processor 1403; the various components are coupled together by a bus system 1404.
  • the bus system 1404 is used to implement connection communication between these components.
  • the bus system 1404 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • the various buses are labeled as total in Figure 14.
  • the first network interface 1401 is configured to receive and send signals during the process of transmitting and receiving information with other external network elements.
  • a first memory 1402 configured to store a computer program capable of running on the first processor 1403;
  • the first processor 1403 is configured to: when the computer program is executed, execute:
  • the first memory 1402 in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read only memory (PROM), an erasable programmable read only memory (Erasable PROM, EPROM), or an electric Erase programmable read only memory (EEPROM) or flash memory.
  • the volatile memory can be a Random Access Memory (RAM) that acts as an external cache.
  • RAM Random Access Memory
  • many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM).
  • the first memory 1402 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
  • the first processor 1403 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the first processor 1403 or an instruction in a form of software.
  • the first processor 1403 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA). Or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the first memory 1402, and the first processor 1403 reads the information in the first memory 1402 and completes the steps of the above method in combination with hardware.
  • the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof.
  • the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processing (DSP), Digital Signal Processing Equipment (DSP Device, DSPD), programmable Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general purpose processor, controller, microcontroller, microprocessor, other for performing the functions described herein In an electronic unit or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSP Digital Signal Processing
  • DSP Device Digital Signal Processing Equipment
  • PLD programmable Programmable Logic Device
  • FPGA Field-Programmable Gate Array
  • the techniques described herein can be implemented by modules (eg, procedures, functions, and so on) that perform the functions described herein.
  • the software code can be stored in memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • a composition of a network device 150 according to an embodiment of the present invention is provided.
  • the network device 150 can implement the function of the AMF in the 5G network architecture, and the network device 150 can The second receiving portion 1501 and the second transmitting portion 1502 are included;
  • the second receiving part 1501 is configured to receive service support capability indication information of the UE sent by the UE and/or the historical AMF in a registration process of the UE; or, in the Receiving, by the UE, the service support capability indication information of the UE that is sent by the UE;
  • the second sending part 1502 is configured to send the service support capability indication information of the UE to the session management function SMF, where the service support capability indication information of the UE is used by the SMF to establish a service for the UE Service bearer when dedicated bearer.
  • the service support capability indication information of the UE includes: indication information indicating that the UE needs voice service and only supports VoIP service, is used to indicate that the UE needs voice service, and only supports circuit domain service. Indicating information, indication information indicating that the UE needs voice service and supporting network telephony VoIP service and circuit domain service, or indication information indicating that the UE does not need voice service, or carrying on for emergency call service Network indication information.
  • the second sending part 1502 is configured to send the service support capability indication information of the UE sent by the UE to the SMF.
  • the second receiving part 1501 is configured to receive a registration request registration request message sent by the UE through the radio access network RAN, where the registration request message carries the service support capability indication of the UE. Information; and/or,
  • the Information Response message carries the service support capability indication information of the UE.
  • the second sending part 1502 is configured to send an N11-Request message carrying the service support capability indication information of the UE to the SMF.
  • the second receiving part 1501 is configured to receive a protocol data unit PDU session establishment request PDU Session Establishment Request message sent by the UE, where the PDU Session Establishment Request message carries the The service support capability indication information of the UE.
  • the second sending part 1502 is configured to send a session management request SM Request message carrying the service support capability indication information of the UE to the SMF.
  • the second receiving part 1501 is configured to receive the first fallback indication information sent by the SMF, and the second sending part 1502 is configured to send the first fallback indication information to the next generation wireless Accessing the network NG-RAN; wherein the first fallback indication information is used to indicate that the service dedicated bearer is dropped from the 5G network to the 4G network or the service system is switched from 5G to 4G;
  • the second receiving part 1501 is configured to receive the second fallback indication information sent by the SMF, where the second sending part 1502 is configured to send the second fallback indication information to the UE, where The second fallback indication information is used to indicate that the service dedicated bearer is dropped from the 5G network to the 2G or 3G network or the service system is switched from 5G to 2G or 3G.
  • the second sending part 1502 is further configured to send the service support capability indication information of the UE to the mobility management entity MME;
  • the service support capability indication information of the UE includes: a finger used to indicate that the UE needs voice service and only supports VoIP service.
  • the indication information, or indication information indicating that the UE needs voice service and supports network telephony VoIP service and circuit domain service, or network indication information for bearer for emergency call service indicates that the emergency call service is carried over the 4G network;
  • the service support capability indication information of the UE is indication information indicating that the UE needs voice service and only supports circuit domain service, or a network that carries the bearer for emergency call service.
  • the indication information indicates that the emergency call service is carried over the 2/3G network.
  • the embodiment provides a computer readable medium storing a program for switching a service bearer network, where the program of the handover service bearer network is executed by at least one processor to implement the foregoing embodiment 2
  • the steps of the method For a detailed description of the computer readable medium, refer to the description in the fifth embodiment, and details are not described herein again.
  • FIG. 16 shows a specific hardware structure of the network device 150 according to an embodiment of the present invention, which may include:
  • the bus system 1604 is used to implement connection communication between these components.
  • the bus system 1604 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • various buses are labeled as bus system 1604 in FIG. among them,
  • the second network interface 1601 is configured to receive and send signals during the process of transmitting and receiving information with other external network elements.
  • a second memory 1602 configured to store a computer program capable of running on the second processor 1603;
  • the second processor 1603 is configured to: when the computer program is executed, perform:
  • the second processor 1603 in the network device 150 is further configured to perform the method steps described in the foregoing Embodiment 2 when the computer program is executed, and details are not described herein.
  • composition of a network device 170 may be included, which may include: a third receiving portion 1701, an executing portion 1702;
  • the third receiving part 1701 is configured to receive service support capability indication information of the user equipment UE that is sent by the session management function AMF in the 5G network architecture;
  • the executing part 1702 is configured to perform a circuit domain fallback CSFB process when the service support capability indication information of the UE is indication information indicating that the UE needs voice service and only supports circuit domain service.
  • the executing part 1702 is configured to send a paging Paging request or a notification notification request to the UE, where the paging request or the notification request is used to instruct the UE to perform the CSFB process. ;
  • a service bearer setup failure response regarding the VoIP of the VoIP is sent to the IP Multimedia Subsystem IMS.
  • the executing part 1702 is configured to send a service bearer setup request for the network telephony VoIP to the evolved global terrestrial radio access network E-UTRAN; wherein the service bearer setup request is used for the E- After the UTRAN sends a service bearer setup reject message to the IMS according to the current network environment, the IMS sends a notification message about the CSFB to the UE by using a SIP message, where the notification message of the CSFB is used to notify the UE to perform Place Said CSFB process.
  • the embodiment further provides a computer readable medium storing a program for switching a service bearer network, where the program of the handover service bearer network is implemented by at least one processor to implement the foregoing third embodiment.
  • the computer readable medium For a detailed description of the computer readable medium, refer to the description in the fifth embodiment, and details are not described herein again.
  • FIG. 18 shows a specific hardware structure of the network device 170 according to the embodiment of the present invention, which may include:
  • the bus system 1804 includes a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 1804 in FIG. among them,
  • the third network interface 1801 is configured to receive and send signals during the process of transmitting and receiving information with other external network elements.
  • a third memory 1802 configured to store a computer program capable of running on the third processor 1803;
  • the third processor 1803 is configured to: when the computer program is executed, execute:
  • the service support capability indication information of the UE is indication information indicating that the UE needs voice service and only supports circuit domain service
  • the circuit domain fallback CSFB process is performed.
  • the third processor 1803 in the network device 170 is further configured to perform the method steps described in the foregoing Embodiment 3 when the computer program is executed, and details are not described herein.
  • embodiments of the present invention can be provided as a method, system, Or a computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
  • the SMF may know the service support capability indication information of the UE in advance. After the voice service is performed by the UE, it is determined whether the bearer of the voice service is dropped from the 5G network to the 4G network or the 5G network is dropped to the 2G or 3G network according to the service support capability indication information of the UE, thereby determining to send the first fallback indication. The information is also the second fall indication information. In this way, the UE does not perceive the fall of the service bearer network in the network side, and the UE does not need to actively determine the initiation mode of the voice service, thereby reducing the complexity of customization and deployment for the UE.
  • the support capability combines with the service support capabilities of the network side to determine whether to trigger the fallback to ensure the successful establishment of the service connection.

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Abstract

本发明实施例提供了一种切换业务承载网络的方法、设备及计算机存储介质;该方法应用于5G网络架构中的会话管理功能SMF,所述方法包括:接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示;从预存的关于UE的业务支持能力指示信息中获取所述UE的业务支持能力指示信息;基于所述UE的业务支持能力指示信息,针对所述请求信息或所述切换指示发送系统切换请求消息。可以使得UE不会感知到网络侧中业务承载网络的回落,UE也不需要主动判断语音业务的发起方式,从而减少了针对UE进行定制及部署的复杂度,网络侧可根据UE对于业务的支持能力结合网络侧本身的业务支持能力,决定是否触发回落来保障业务连接的成功建立。

Description

一种切换业务承载网络的方法、设备及计算机存储介质 技术领域
本发明实施例涉及无线通信技术领域,尤其涉及一种切换业务承载网络的方法、设备及计算机存储介质。
背景技术
随着通信技术的发展,第五代移动通信技术(5G,5th Generation)的研究也已经展开。5G的无线接入叫New Radio,简称NR。并且5G具有超高的数据传输速率、海量的数据连接数目以及较低的数据传输时延等优势。
在目前5G网络的建设初期,5G网络仅能够支持数据服务,无法支持语音服务,从而导致5G网络的部署困难。
发明内容
为解决上述技术问题,本发明实施例期望提供一种切换业务承载网络的方法、设备及计算机存储介质;能够在5G网络建设初期无法支持语音服务的条件下,回落至具有语音服务的通信网络,从而避免出现5G网络部署困难的情况。
本发明实施例的技术方案可以如下实现:
第一方面,本发明实施例提供了一种切换业务承载网络的方法,所述方法应用于5G网络架构中的会话管理功能SMF,所述方法包括:
接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示;其中,所述业务专用承载的切换指示,用于指示需要将业务专用承载由5G切换至4G或2/3G的业务,或者用于指示将整个业务系统由5G切换至4G或2/3G;
从预存的关于UE的业务支持能力指示信息中获取所述UE的业务支 持能力指示信息;
基于所述UE的业务支持能力指示信息,针对所述请求信息或所述切换指示发送系统切换请求消息。
第二方面,本发明实施例提供了一种切换业务承载网络的方法,所述方法应用于5G网络架构中的会话管理功能AMF,所述方法包括:
在所述UE的注册过程中,接收由所述UE和/或历史AMF发送的所述UE的业务支持能力指示信息;或者,在所述针对所述UE的会话建立过程中,接收由所述UE发送的所述UE的业务支持能力指示信息;
将所述UE的业务支持能力指示信息发送至会话管理功能SMF;其中,所述UE的业务支持能力指示信息用于所述SMF在针对所述UE建立业务专用承载时进行系统切换。
第三方面,本发明实施例提供了一种切换业务承载网络的方法,所述方法应用于4G网络架构中的移动管理实体MME,所述方法包括:
接收由5G网络架构中的会话管理功能AMF发送的用户设备UE的业务支持能力指示信息;
当所述UE的业务支持能力指示信息为用于指示所述UE需要语音业务且仅支持电路域业务的指示信息时,执行电路域回落CSFB过程。
第四方面,本发明实施例提供了一种网络装置,包括:第一接收部分、获取部分和第一发送部分;其中,
所述第一接收部分,配置为接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示;其中,所述业务专用承载的切换指示,用于指示将业务专用承载由5G切换至4G或2/3G,或者用于指示将整个业务系统由5G切换至4G或2/3G;
所述获取部分,配置为从预存的关于UE的业务支持能力指示信息中获取所述UE的业务支持能力指示信息;
所述第一发送部分,配置为基于所述UE的业务支持能力指示信息,针 对所述请求信息或所述切换指示发送系统切换请求消息。
第五方面,本发明实施例提供了一种网络装置,其中,所述装置包括:第二接收部分和第二发送部分;其中,
所述第二接收部分,配置为在所述UE的注册过程中,接收由所述UE和/或历史AMF发送的所述UE的业务支持能力指示信息;或者,在所述针对所述UE的会话建立过程中,接收由所述UE发送的所述UE的业务支持能力指示信息;
所述第二发送部分,配置为将所述UE的业务支持能力指示信息发送至会话管理功能SMF;其中,所述UE的业务支持能力指示信息用于所述SMF在针对所述UE建立业务专用承载时进行系统切换。
第六方面,本发明实施例提供了一种网络装置,其中,所述装置包括:第三接收部分、执行部分;其中,
所述第三接收部分,配置为接收由5G网络架构中的会话管理功能AMF发送的用户设备UE的业务支持能力指示信息;
所述执行部分,配置为当所述UE的业务支持能力指示信息为用于指示所述UE需要语音业务且仅支持电路域业务的指示信息时,执行电路域回落CSFB过程。
第七方面,本发明实施例提供了一种网络装置,其中,所述装置包括:第一网络接口,第一存储器和第一处理器;其中,
所述第一网络接口,用于在与其他外部网元之间进行收发信息过程中,信号的接收和发送;
所述第一存储器,用于存储能够在所述第一处理器上运行的计算机程序;
所述第一处理器,用于在运行所述计算机程序时,执行第一方面所述方法的步骤。
第八方面,本发明实施例提供了一种网络装置,其中,所述装置包 括:第二网络接口,第二存储器和第二处理器;其中,
所述第二网络接口,用于在与其他外部网元之间进行收发信息过程中,信号的接收和发送;
所述第二存储器,用于存储能够在所述第二处理器上运行的计算机程序;
所述第二处理器,用于在运行所述计算机程序时,执行第二方面所述方法的步骤。
第九方面,本发明实施例提供了一种网络装置,其中,所述装置包括:第三网络接口,第三存储器和第三处理器;其中,
所述第三网络接口,用于在与其他外部网元之间进行收发信息过程中,信号的接收和发送;
所述第三存储器,用于存储能够在所述第三处理器上运行的计算机程序;
所述第三处理器,用于在运行所述计算机程序时,执行第三方面所述方法的步骤。
第十方面,本发明实施例提供了一种计算机可读介质,所述计算机可读介质存储有切换业务承载网络的程序,所述切换业务承载网络的程序被至少一个处理器执行时实现第一方面或第二方面或第三方面所述的方法的步骤。
本发明实施例提供了一种切换业务承载网络的方法、设备及计算机存储介质;SMF可以预先获知UE的业务支持能力指示信息之后,就能够在UE进行语音业务时,根据UE的业务支持能力指示信息判断该语音业务的承载由5G网络回落至4G网络还是由5G网络回落至2G或3G网络,从而确定发送第一回落指示信息还是第二回落指示信息。这样可以使得UE不会感知到网络侧中业务承载网络的回落,UE也不需要主动判断语音业务的发起方式,从而减少了针对UE进行定制及部署的复杂度,网络侧可根据UE 对于业务的支持能力结合网络侧本身的业务支持能力,决定是否触发回落来保障业务连接的成功建立。
附图说明
图1为一种非典型性的5G基础网络架构示意图;
图2为本发明实施例提供的一种切换业务承载网络的方法流程示意图;
图3为本发明实施例提供的另一种切换业务承载网络的方法流程示意图;
图4为本发明实施例提供的又一种切换业务承载网络的方法流程示意图;
图5为本发明实施例提供的一种执行CSFB过程的流程示意图;
图6为本发明实施例提供的另一种执行CSFB过程的流程示意图;
图7为本发明实施例提供的具体示例一的流程示意图;
图8为本发明实施例提供的具体示例二的流程示意图;
图9为本发明实施例提供的具体示例三的流程示意图;
图10为本发明实施例提供的具体示例四的流程示意图;
图11为本发明实施例提供的MO UE进行语音业务时网络回落的流程示意图;
图12为本发明实施例提供的MT UE进行语音业务时网络回落的流程示意图;
图13为本发明实施例提供的一种网络装置的组成示意图;
图14为本发明实施例提供的一种网络装置的具体硬件结构示意图;
图15为本发明实施例提供的另一种网络装置的组成示意图;
图16为本发明实施例提供的另一种网络装置的具体硬件结构示意图;
图17为本发明实施例提供的又一种网络装置的组成示意图;
图18为本发明实施例提供的又一种网络装置的具体硬件结构示意图。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点与技术内容,下面结合附图对本发明实施例的实现进行详细阐述,所附附图仅供参考说明之用,并非用来限定本发明实施例。
参见图1,其示出了一种非典型性的5G基础网络架构,称之为基于服务的网络架构(SBA,Service-Based Architecture)。如图1所示,用户设备(UE,User Equipment)通过(无线)接入网络((R)AN,(Radio)Access Network)接入到核心访问与移动性管理(AMF,Core Access and Moblity Management Function),用户设备(UE,User Equipment)也可以直接接入到AMF;AMF用于对网络的控制面消息进行处理,功能类似长期演进(LTE,Long Term Evolution)系统中移动管理实体(MME,Mobility Management Entity)中的EPS移动性管理(EMM)。鉴权服务功能(AUSF,Authentication Server Function)类似LTE系统中MME的健全功能,实现对UE的双向鉴权,支持统一的鉴权框架。用户面功能(UPF,Userplane Function)类似LTE系统中服务网关S-GW和PDN网关P-GW的综合,与数据网络DataNetwork相连接。会话管理功能(SMF,Seesion Management Function)类似LTE系统中的EPS会话管理ESM功能,主要针对会话进行管理、建立、修改和释放。从中可以看出,AUSF、AMF以及SMF的功能集合,类似于LTE系统中的MME。此外,图1所示的结构中还包括:网络曝光功能(NEF,Network Exposure Function)、网元贮存功能(NRF,NF Repository Function)、策略控制功能(PCF,Policy Control Function)、统一的数据管理(UDM,Unified Data Management)和应用功能(AF,Application Function);其中,NEF用于向外部展示网络功能的一些能力,比如,监控能力、供给能力以及策略或计费能力;NRF能够支持服务发现功能;PCF支持管理网络行为的统一策略框架;UDM包括应用前端(FE)和用户数据仓库(UDR), FE可以访问UDR中的订阅用户信息,UDM的功能类似LTE系统中的HSS,UDR提供订阅数据存储服务,应用前端FE提供基于数据的应用逻辑;AF用关于提供应用服务。
基于上述架构,需要说明的是,在5G网络中,终端需要通过注册流程注册到5G网络上才可以进行5G业务。而5G的注册流程与长期演进(LTE,Long Term Evolution)系统的附着流程不同,注册流程不包括会话建立过程,当终端注册完毕后,AMF将与会话相关的信息,例如非独立(NSA,Non Stand alone)信息通过N11接口的N11_Request消息发送给SMF,随后由SMF来决定是否触发会话建立过程。
本发明实施例的技术方案可以应用在上述非典型性的5G基础网络架构中,因此,基于上述结构,提出以下实施例:
实施例一
参见图2,其示出了本发明实施例提供的一种切换业务承载网络的方法,该方法可以应用于5G网络架构中的会话管理功能(SMF,Seesion Management Function),所述方法包括:
S201:接收针对UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示;
需要说明的是,所述业务专用承载的切换指示,用于指示需要将业务专用承载由5G切换至4G或2/3G的业务,或者用于指示将整个业务系统由5G切换至4G或2/3G;
S202:从预存的关于UE业务支持能力的指示信息中获取所述UE的业务支持能力指示信息;
S203:基于所述UE的业务支持能力指示信息,针对所述请求信息或切换指示发送业务承载请求消息。
具体来说,网络电话(VoIP,Voice over Internet Protocol)业务承载于LTE网络架构,而电路域业务承载于2G或3G网络中,当UE进行语音业 务时,需要对该业务进行承载的网络类型进行确定。因此,首先需要获知UE的业务支持能力,因此,以语音业务为例,所述UE的业务支持能力指示信息可以包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或用于指示所述UE不需要语音业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息。
具体来说,上述五种所述UE的业务支持能力指示信息可以通过设置具体参数值进行表示,例如:设置为“0”时,表示该UE需要语音服务,并仅支持VoIP电话(包括VoNR、VoLTE、VoWiFi等);设置为“1”时,表示该UE需要语音服务,并仅支持电路域语音(包括CSFB和3G CS域呼叫);设置为“2”时,表示该UE需要语音服务,并同时支持VoIP和电路域语音;设置为“3”时,表示该UE不需要语音服务;而针对紧急呼叫业务进行承载的网络指示信息可以是用来指示针对紧急呼叫业务进行承载的网络为5G网络或4G网络或2/3G网络,因此,参数值设置为“4”时,表示针对该UE的紧急呼叫业务通过5G网络进行承载;参数值设置为“5”时,表示针对该UE的紧急呼叫业务通过4G网络进行承载;参数值设置为“6”时,表示针对该UE的紧急呼叫业务通过2/3G网络进行承载。
针对上述五种所述UE的业务支持能力指示信息,可以得知,当UE需要进行语音业务时,就能够按照所述UE的业务支持能力指示信息来确定从5G网络回落的目的网络类型,比如从5G网络回落至4G网络;或者从5G网络回落至2G或3G;或者通过4G网络承载紧急呼叫,或者通过2/3G网络承载紧急呼叫。由于网络侧可以主动判断是否触发UE的2G或3G或4G回落,因此,可以保障5G网络下,UE的语音业务正常建立。
需要说明的是,本发明实施例将语音业务作为非典型示例用来说明实施例的技术方案,可以理解地,本领域技术人员可以将本发明实施例的技 术方案在语音业务示例的指导下应用于其他业务,本发明实施例在此不做赘述。
针对各种目的网络类型,所述基于所述UE的业务支持能力指示信息,针对所述请求信息或所述切换指示发送系统切换请求消息,包括:
当所述UE的业务支持能力指示信息指示所述UE支持VoIP业务或针对紧急呼叫业务进行承载的网络指示信息表示通过4G网络承载紧急呼叫业务时,通过核心访问与移动性管理AMF向下一代无线接入网络(NG-RAN,Next Generation RAN)发送第一回落指示信息;其中,所述第一回落指示信息用于指示所述业务专用承载由5G网络切换至4G网络或将所述业务系统由5G切换至4G;
当所述UE的业务支持能力指示信息用于指示所述UE仅支持电路域业务或针对紧急呼叫业务进行承载的网络指示信息表示通过2/3G网络承载紧急呼叫业务时,通过AMF向所述UE发送第二回落指示信息;其中,所述第二回落指示信息用于指示所述业务专用承载由5G网络回落至2G或3G网络或将所述业务系统由5G切换至2G或3G。
针对图2所示的技术方案,预存的关于UE业务支持能力的指示信息可以由SMF在UE进行注册或会话建立的过程中进行获取。因此,在第一种可能的实现方式中,所述接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示之前,所述方法还包括:
在所述UE的注册过程中,接收由AMF发送的所述UE的业务支持能力指示信息。
优选来说,所述接收由AMF发送的所述UE的业务支持能力指示信息,包括:
接收由所述AMF发送的携带有所述UE的业务支持能力指示信息的N11-Request消息;
从所述N11-Request消息中解析得到所述UE的业务支持能力指示信息 的N11-Request消息。
在第二种可能的实现方式中,所述接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示之前,所述方法还包括:
在针对所述UE的会话建立过程中,接收由AMF和/或UDM发送的所述UE的业务支持能力指示信息。
优选地,所述接收由AMF和/或UDM发送的所述UE的业务支持能力指示信息,包括:
接收由所述AMF发送的携带有所述UE的业务支持能力指示信息的会话管理请求SM Request消息,并从所述SM Request消息中解析得到所述UE的业务支持能力指示信息;和/或,
接收由所述UDM发送的携带有所述UE的业务支持能力指示信息的订阅数据响应Subscription data response消息,并从所述Subscription data response消息中解析得到所述UE的业务支持能力指示信息。
通过上述两种可能的实现方式,SMF可以预先获知UE的业务支持能力指示信息之后,以语音业务为例,就能够在UE进行语音业务时,根据UE的业务支持能力指示信息判断该语音业务的承载由5G网络回落至4G网络还是由5G网络回落至2G或3G网络,从而确定发送第一回落指示信息还是第二回落指示信息。可以使得UE不会感知到网络侧中业务承载网络的回落,UE也不需要主动判断语音业务的发起方式,从而减少了针对UE进行定制及部署的复杂度,网络侧可根据UE对于业务的支持能力结合网络侧本身的业务支持能力,决定是否触发回落来保障业务连接的成功建立。
实施例二
基于前述实施例相同的技术构思,参见图3、其示出了本发明实施例提供了一种切换业务承载网络的方法,所述方法应用于5G网络架构中的会话管理功能AMF,所述方法包括:
S301:在所述UE的注册过程中,接收由所述UE和/或历史AMF发送的所述UE的业务支持能力指示信息;或者,在所述针对所述UE的会话建立过程中,接收由所述UE发送的所述UE的业务支持能力指示信息;
S302:将所述UE的业务支持能力指示信息发送至会话管理功能SMF;
其中,所述UE的业务支持能力指示信息用于所述SMF在针对所述UE建立业务专用承载时进行系统切换。
对于图3所示的技术方案,以语音业务为例,所述UE的业务支持能力指示信息,包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或用于指示所述UE不需要语音业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息。
对于图3所示的技术方案,在具体实现时,所述在所述UE的注册过程中,接收由所述UE和/或历史AMF发送的所述UE的业务支持能力指示信息,可以包括:
接收由所述UE发送的注册请求Registration Request消息;其中,所述UE的业务支持能力指示信息通过NAS封装后,承载于所述注册请求Registration Request消息中;
接收由所述历史AMF发送的承载有所述UE的业务支持能力指示信息的信息响应Information Response消息。
可以理解地,当发生AMF迁移或切换时,图3所示技术方案的当前AMF会向历史AMF发送信息请求Information Request消息,此时,历史AMF会将之前保存的所述UE的业务支持能力指示信息承载于信息响应Information Response消息返回至当前AMF。
需要说明的是,由于UE发送的所述UE的业务支持能力指示信息在时效性上高于历史AMF所发送的所述UE的业务支持能力指示信息,因此, UE发送的所述UE的业务支持能力指示信息具有更高的优先级。基于此,当接收到由所述UE和所述历史AMF分别发送的所述UE的业务支持能力指示信息时,所述将所述UE的业务支持能力指示信息发送至会话管理功能SMF,包括:
将所述UE发送的所述UE的业务支持能力指示信息发送至所述SMF。
对于上述具体实现来说,在所述UE的注册过程中,将所述UE的业务支持能力指示信息发送至会话管理功能SMF,包括:
将携带有所述UE的业务支持能力指示信息的N11-Request消息发送至所述SMF。
对于图3所示的技术方案,在具体实现时,在所述针对所述UE的会话建立过程中,接收由UE发送的所述UE的业务支持能力指示信息,包括:
接收由所述UE发送的协议数据单元PDU会话建立请求PDU Session Establishment Request消息,其中,所述PDU Session Establishment Request消息中携带有所述UE的业务支持能力指示信息。
对于上述具体实现来说,在所述针对所述UE的会话建立过程中,将所述UE的业务支持能力指示信息发送至会话管理功能SMF,包括:
将携带有所述UE的业务支持能力指示信息的会话管理请求SM Request消息发送至所述SMF。
通过上述具体实现,可以得知,SMF可以根据接收到的所述UE的业务支持能力指示信息针对所述UE建立业务专用承载时进行系统切换,SMF具体确定系统切换的过程参见实施例一中的描述,在此不再赘述,但是对于AMF来说,在将所述UE的业务支持能力指示信息发送至所述SMF后,所述方法还包括:
接收所述SMF发送的第一回落指示信息,并将所述第一回落指示信息发送至下一代无线接入网络NG-RAN;其中,所述第一回落指示信息用于指示所述业务专用承载由5G网络回落至4G网络或将所述业务系统由5G 切换至4G;
或者,接收所述SMF发送的第二回落指示信息,并将所述第二回落指示信息发送至所述UE;其中,第二回落指示信息用于指示所述业务专用承载由5G网络回落至2G或3G网络或将所述业务系统由5G切换至2G或3G。
此外,在进行系统切换的过程中,在接收到所述第一回落指示信息或所述第二回落指示信息后,所述方法还包括:
向移动管理实体MME发送所述UE的业务支持能力指示信息;
其中,若接收到所述第一回落指示信息,则所述UE的业务支持能力指示信息包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、或用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息表示通过4G网络承载紧急呼叫业务;
若接收到所述第二回落指示信息,则所述UE的业务支持能力指示信息为用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息表示通过2/3G网络承载紧急呼叫业务。
由此可知,MME通过AMF获知UE的业务支持能力指示信息之后,就能够在从5G网络切换到4G网络之后,进行业务承载。MME进行业务承载的过程参见后续实施例三。
实施例三
基于前述实施例相同的技术构思,参见图4、其示出了本发明实施例提供了一种切换业务承载网络的方法,所述方法应用于4G网络架构中的移动管理实体MME,所述方法包括:
S401:接收由5G网络架构中的会话管理功能AMF发送的用户设备UE的业务支持能力指示信息;
S402:当UE的业务支持能力指示信息为用于指示UE需要语音业务且 仅支持电路域业务的指示信息时,执行电路域回落CSFB过程。
需要说明的是,图4所示的技术方案中,S401的一种具体实现方式可以包括:在由5G网络切换Handover至4G网络的过程中,接收由AMF发送的携带有所述UE的业务支持能力指示信息的重定位请求Relocation Request。
对于图4所示的技术方案,在一种可能的实现方式中,参见图5,所述执行CSFB过程,包括:
S4021A:向所述UE发送寻呼Paging请求或通知Notification请求;其中,所述寻呼请求或所述通知请求用于指示所述UE执行所述CSFB过程;
S4022A:向IP多媒体子系统IMS发送关于网络电话VoIP的业务承载建立失败响应。
需要说明的是,对于上述实现方式,CSFB过程由MME进行触发决定。
对于图4所示的技术方案,在另一种可能的实现方式中,参见图6,所述执行CSFB过程,包括:
S4021B:向演进型全球陆地无线接入网(E-UTRAN,Evolved UMTS Terrestrial Radio Access Network)发送关于网络电话VoIP的业务承载建立请求;
S4022B:所述E-UTRAN根据当前的网络环境向所述IMS发送承载建立拒绝消息;
S4023B:所述IMS通过SIP消息向所述UE发送关于CSFB的通知消息,所述CSFB的通知消息用于通知UE执行所述CSFB过程。
需要说明的是,对于上述实现方式,CSFB过程由E-UTRAN进行触发决定。需要说明的是,所述E-UTRAN根据当前的网络环境向所述IMS发送承载建立拒绝消息,可以包括:
当所述E-UTRAN不支持VoIP业务承载建立时,向所述IMS发送承载建立拒绝消息;例如,E-UTRAN中的演进型节点(eNodeB)没有安装相 关许可License,从而不能识别关于网络电话VoIP业务的承载建立请求;
或者,当所述E-UTRAN的网络环境无法满足VoIP业务承载建立所需的网络环境时,向所述IMS发送承载建立拒绝消息;例如,所述E-UTRAN的网络拥塞以致无法满足VoIP业务承载建立所需的网络环境;
或者,所述UE处于所述E-UTRAN范围中且所述UE的信号强度低于预设的强度阈值时,向所述IMS发送承载建立拒绝消息;例如,所述UE处于所述E-UTRAN的弱覆盖范围以致eNodeB无法为UE建立VoIP业务承载。
实施例四
基于前述实施例相同的发明构思,本实施例通过以下具体示例对前述三个实施例的技术方案进行详细地阐述。在本实施例中,将语音业务作为非典型示例用来说明技术方案,可以理解地,本领域技术人员可以将本发明实施例的技术方案在语音业务示例的指导下应用于其他业务,本发明实施例在此不做赘述。
首先,本实施例通过具体示例一和具体示例二来阐述SMF获得UE的业务支持能力指示信息的过程;接着,在具体示例一和具体示例二的技术方案基础上,本实施例通过具体示例三来阐述在UE的语音业务过程中,切换业务承载网络的过程;最后,通过具体示例四来阐述语音业务从5G网络回落到4G网络之后触发CSFB的过程。
具体示例一
在本具体示例中,SMF可以在UE注册过程中获得UE的业务支持能力指示信息,具体流程如图7所示,需要说明的是,图7所示技术方案的流程与第三代合作伙伴计划(3GPP,3rd Generation Partnership Project)的技术规范(TS,Technical Specification)23.502版本内Clause 4.2.2.2.2部分中所记载的注册流程相同。
首先,在UE注册流程中,AMF会获知UE的业务支持能力指示信息, 具体过程如下:
UE将自身的业务支持能力指示信息进行NAS封装,并承载于Registration Request消息;随后,UE将Registration Request消息发送至(R)AN;接着,(R)AN对AMF进行AMF选择AMF selection,随后将Registration Request消息发送至选择的AMF,本具体示例中称之为新AMF(new AMF);因此,上述步骤实现了new AMF从UE处获取UE的业务支持能力指示信息;
此外,new AMF还可以向历史AMF(old AMF)发送信息请求Information Request,并接收old AMF发送的承载有UE的业务支持能力指示信息的信息响应Information Response。
需要说明的是,由于old AMF中所存储的UE的历史业务支持能力指示信息,可作为new AMF无法从UE获得业务支持能力指示信息的替代方案。但是,当new AMF能够从UE获得业务支持能力指示信息,并且也能够从old AMF处获知UE的业务支持能力指示信息时,new AMF可以认为从UE处获得的业务支持能力指示信息具有更高的优先级,从而忽略从old AMF处获知的UE的业务支持能力指示信息。
上述过程描述了AMF获知UE的业务支持能力指示信息的具体过程,可以理解地,上述过程与图7中的步骤1至步骤5相对应。
另外,在UE注册流程中,new AMF会向UE发送确认请求Identity Request,在接收到UE发送的确认响应Identity Response后,new AMF会依次进行AUSF选择selection、UDM选择selection和PCF选择selection,并且在各选择完成时分别进行相应的鉴权Authenticatio、升级Update步骤和相应的信息请求。具体步骤如图7中的步骤6至步骤17,需要说明的是,步骤6至步骤17的具体含义及实现方式可以参见3GPP TS 23.502Clause 4.2.2.2.2中的相应内容,在此不再赘述。
在执行完上述步骤后,new AMF可以将UE的业务支持能力指示信息 封装在N11_Request消息中发送至SMF,从而使得SMF获知UE的业务支持能力指示信息,该过程与图7中的步骤18相对应。
随后,SMF向new AMF发送N11_Response,如步骤19。接着,完成UE注册流程的后续步骤,例如步骤20至步骤23。需要说明的是,步骤19至步骤23的具体含义及实现方式可以参见3GPP TS 23.502Clause 4.2.2.2.2中的相应内容,在此不再赘述。
具体示例二
在本具体示例中,SMF可以在UE的会话建立过程中来获得UE的业务支持能力指示信息,具体流程如图8所示,需要说明的是,图8所示技术方案的流程与第三代合作伙伴计划(3GPP,3rd Generation Partnership Project)的技术规范(TS,Technical Specification)23.502版本内Clause 4.3.2.2.1部分中所记载的会话建立流程相同。
首先,AMF从UE处获取UE的业务支持能力指示信息,具体如步骤1,UE向AMF发送承载有自身的业务支持能力指示信息的PDU会话建立请求PDU Session Establishment Request;随后,AMF根据步骤2完成SMF选择SMF selection后,将该PDU Session Establishment Request通过会话管理请求SM Request向被选择的SMF发送,如步骤3;从而使得SMF获得UE的业务支持能力指示信息。
此外,SMF还可以向UDM发送订阅数据请求Subscription data Request,消息,如步骤4a;随后,UDM将UE的业务支持能力指示信息封装在订阅数据响应Subscription data response消息中发送至SMf,如步骤4b。从而也能够使得SMF获得UE的业务支持能力指示信息。
图8中,后续步骤5至步骤19的具体含义及实现方式可以参见3GPP TS 23.502Clause 4.3.2.2.1中的相应内容,在此不再赘述。
具体示例三
通过上述两个具体示例的方案,使得SMF获得UE的业务支持能力指 示信息,从而SMF就可以基于UE的业务支持能力指示信息在UE的语音业务过程中对承载语音业务的网络进行切换。以UE为主叫(MO,Mobile Origination Call)UE为例,具体过程如图9所示:
步骤1:MO UE在起呼过程中向IMS发送用于建立VoIMS(Voice over IMS)的会话初始协议(SIP,Session Initiation Protocol)Invite信令;
步骤2:IMS向策略与计费规则功能(PCRF,Policy and Charging Rules Function)下发VoIMS建立请求,用于请求建立VoIMS专用承载;
步骤3:PCRF向SMF发送业务承载建立请求;
步骤4:SMF根据UE的业务支持能力指示信息确定业务网络的回落;
当UE的业务支持能力指示信息用于指示所述UE所述UE支持VoIP业务时,SMF确定触发由5G网络回落至4G网络,于是,如图9中点划线框所示,步骤5a:SMF向AMF发送用于指示由5G网络回落至4G网络的业务承载请求;步骤6a:AMF向NG-RAN发送第一回落指示信息;其中,所述第一回落指示信息用于指示所述业务专用承载由5G网络回落至4G网络或将业务系统由5G切换至4G;
当UE的业务支持能力指示信息用于指示所述UE仅支持电路域业务时,SMF确定触发由5G网络回落至2G或3G网络,于是,如图9中虚线框所示,步骤5b:SMF向AMF发送用于指示由5G网络回落至2G或3G网络的业务承载请求消息;步骤6b:AMF向UE发送第二回落指示信息;其中,所述第二回落指示信息用于指示所述业务专用承载由5G网络回落至2G或3G网络将业务系统由5G切换至2G或3G。
需要说明的是,对于被叫(MT,Mobile Termination Call)UE来说,与图9所示流程不同的是:UE会在步骤1中接收到SIP Invite消息。而与图9所示的MO流程的其他步骤一致的,IMS会向PCRF下发VoIMS建立请求,并由SMF确定业务网络的回落。在此本具体示例不做赘述。
具体示例四
针对具体示例三,当SMF确定由5G网络回落至4G网络后,具体由5G网络切换Handover至4G网络的流程如图10所示,而图10所示的切换流程与3GPP TS 23.502中的相应内容相同,在此不再赘述。
需要值得注意的是,图10所示的流程中,AMF可以在步骤3所述的向MME发送的重定位请求Relocation Request消息中,携带有UE的业务支持能力指示信息,从而使得MME根据该UE的业务支持能力指示信息确定通过VoIP承载UE的语音业务还是通过CSFB过程回落至电路域承载UE的语音业务。
具体示例五
基于上述具体示例三和具体示例四,在本具体示例中,MME就能够在建立VoLTE承载过程中决定是否触发CSFB流程,本具体示例通过lUE为MO UE以及MT UE两个方面对触发CSFB流程进行阐述。
第一方面
参见图11,其示出了MO UE进行语音业务时网络回落的过程,可以包括:
步骤1:UE向IMS发送SIP Invite消息;该消息用于请求建立VoLTE通话;
步骤2:IMS向PCRF下发VoLTE建立请求VoLTE establishment,用于请求建立VoLTE专用承载;
步骤3:PCRF向SMF以及服务或PDN网关(S/P-GW,Server/PDN Gateway)发送承载建立请求Bearer establishment request;该请求用于请求建立VoLTE专用承载;
步骤4a:SMF接收到承载建立请求后,确定业务网络的回落;
步骤4a之后,可以按照具体示例四中的流程执行切换过程Handover Procedure。在切换过程中,MME可以从AMF中获知UE的业务支持能力指示信息。在切换过程完成之后,步骤4b:S/P-GW向MME发送承载建立 请求Bearer establishment request;
步骤5:MME根据UE的业务支持能力指示信息执行CSFB过程。
具体来说,当MME从AMF处获知的UE的业务支持能力指示信息为用于指示所述UE仅支持电路域业务的指示信息,说明MME能够获知UE需要语音服务,且仅支持电路域业务,于是,就需要进行CSFB过程。而CSFB过程可以由MME触发,也可以不由MME触发。因此,当CSFB过程由MME触发时,参见图11的点划线框所示,步骤6a:向所述UE发送包含有CSFB指示indicator的寻呼Paging请求或通知Notification请求;其中,所述CSFB indicator用于指示所述UE执行所述CSFB过程;步骤7a:向IP多媒体子系统IMS发送关于VoLTE业务的承载建立失败响应。
可以理解地,UE在接收到Paging或Notification请求后,步骤9:UE就能够根据CSFB indicator执行CSFB过程Procedure。
当CSFB过程不由MME触发时,参见图11的虚线框所示,步骤6b:MME向E-UTRAN发送关于网络电话VoIP业务的承载建立请求Bearer setup request;
步骤7b:E-UTRAN根据当前的网络环境向IMS发送承载建立拒绝消息Bearer establishment Reject;
可以理解地,对于步骤7b,详细来说,当E-UTRAN中eNodeB不支持该专有承载建立,如没有安装相关License从而不能识别该请求时,或者当eNodeB网络拥塞以致无法满足VoIP业务承载建立所需的网络环境时,或者当UE处于弱覆盖范围以致eNodeB无法为UE建立该承载时,E-UTRAN向IMS发送Bearer establishment Reject
步骤8b:IMS向UE发送包含有CSFB indicator的SIP响应Response消息;如点划线框所示,CSFB indicator用于指示所述UE执行所述CSFB过程。
可以理解地,UE在接收到SIP Response后,步骤9:UE就能够根据 CSFB indicator执行CSFB Procedure。
第二方面
参见图12,其示出了MT UE进行语音业务时网络回落的过程,可以包括:
步骤1:UE接收由IMS发送的SIP Invite消息;该消息用于请求建立VoLTE通话;
步骤2:IMS向PCRF下发VoLTE establishment;
步骤3:PCRF向SMF以及S/P-GW发送Bearer establishment request;
步骤4:S/P-GW向MME发送承载建立请求Bearer establishment request;
当SMF接收到承载建立请求,且在步骤4之后,可以按照具体示例四中的流程执行切换过程Handover Procedure。
步骤5:MME根据UE的业务支持能力指示信息执行CSFB过程。
具体来说,而CSFB过程可以由MME触发,也可以不由MME触发。因此,当CSFB过程由MME触发时,参见图12的点划线框,步骤6a:向所述UE发送包含有CSFB indicator的Paging请求或Notification请求;步骤7a:向IMS发送关于VoLTE业务的承载建立失败响应。UE在接收到Paging或Notification请求后,步骤11:UE执行CSFB Procedure。
当CSFB过程不由MME触发时,参见图12的虚线框所示,步骤6b:MME向E-UTRAN发送Bearer setup request;
步骤7b:E-UTRAN根据当前的网络环境向IMS发送Bearer establishment Reject;
可以理解地,上述步骤2至步骤7b与第一方面的相应部分相同,此处不再做赘述。
步骤7b之后,还包括步骤8:IMS向移动交换中心(MSC,Mobile Switching Center)发送CSFB触发消息;
步骤9:MSC向MME发送Paging请求;
步骤10:MME向UE发送Paging/Notification请求;
步骤11:UE执行CSFB Procedure。
本实施例通过以上具体示例对前述实施例技术方案的具体实现方式进行了阐述。可以理解地,上述具体示例仅是具体实现方式的非典型性示例,并不对前述实施例的技术方案进行限定。
实施例五
参见图13,其示出了本发明实施例提供的一种网络装置130的组成,该网络装置130可以实现5G网络架构中SMF的功能,该网络装置130可以包括:第一接收部分1301、获取部分1302和第一发送部分1303;其中,
所述第一接收部分1301,配置为接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示;其中,所述业务专用承载的切换指示,用于指示将业务专用承载由5G切换至4G或2/3G,或者用于指示将整个业务系统由5G切换至4G或2/3G;
所述获取部分1302,配置为从预存的关于UE的业务支持能力指示信息中获取所述UE的业务支持能力指示信息;
所述第一发送部分1303,配置为基于所述UE的业务支持能力指示信息,针对所述请求信息或所述切换指示发送系统切换请求消息。
在一种可能的实现方式中,所述UE的业务支持能力指示信息,包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或用于指示所述UE不需要语音业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息。
在上述实现方式中,所述第一发送部分1303,配置为当所述UE的 业务支持能力指示信息指示所述UE支持VoIP业务或针对紧急呼叫业务进行承载的网络指示信息表示通过4G网络承载紧急呼叫业务时,通过访问与移动性管理AMF向下一代无线接入网络NG-RAN发送第一回落指示信息;其中,所述第一回落指示信息用于指示所述业务专用承载由5G网络切换至4G网络或将所述业务系统由5G切换至4G;
当所述UE的业务支持能力指示信息指示所述UE仅支持电路域业务或针对紧急呼叫业务进行承载的网络指示信息表示通过2/3G网络承载紧急呼叫业务时,通过AMF向所述UE发送第二回落指示信息;其中,所述第二回落指示信息用于指示所述业务专用承载由5G网络回落至2G或3G网络或将所述业务系统由5G切换至2G或3G。
在一种可能的实现方式中,所述第一接收部分1301,还配置为:在所述UE的注册过程中,接收由AMF发送的所述UE的业务支持能力指示信息。
在上述实现方式中,所述第一接收部分1301,配置为接收由所述AMF发送的携带有UE的业务支持能力指示信息的N11-Request消息;
从所述N11-Request消息中解析得到所述UE的业务支持能力指示信息的N11-Request消息。
在一种可能的实现方式中,所述第一接收部分1301,还配置为:在针对所述UE的会话建立过程中,接收由AMF和/或统一的数据管理UDM发送的所述UE的业务支持能力指示信息。
在上述实现方式中,所述第一接收部分1301,配置为接收由所述AMF发送的携带有所述UE的业务支持能力指示信息的会话管理请求SM Request消息,并从所述SM Request消息中解析得到所述UE的业务支持能力指示信息;和/或,
接收由所述UDM发送的携带有所述UE的业务支持能力指示信息的订阅数据响应Subscription data response消息,并从所述Subscription data  response消息中解析得到所述UE的业务支持能力指示信息。
可以理解地,在本实施例中,“部分”可以是部分电路、部分处理器、部分程序或软件等等,当然也可以是单元,还可以是模块也可以是非模块化的。
另外,在本实施例中的各组成部分可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。
所述集成的单元如果以软件功能模块的形式实现并非作为独立的产品进行销售或使用时,可以存储在一个计算机可读取存储介质中,基于这样的理解,本实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或processor(处理器)执行本实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
因此,本实施例提供了一种计算机可读介质,该计算机可读介质存储有切换业务承载网络的程序,所述切换业务承载网络的程序被至少一个处理器执行时实现上述实施例一所述的方法的步骤。
基于上述网络装置130以及计算机可读介质,参见图14,其示出了本发明实施例提供的一种网络装置130的具体硬件结构,可以包括:第一网络接口1401、第一存储器1402和第一处理器1403;各个组件通过总线系统1404耦合在一起。可理解,总线系统1404用于实现这些组件之间的连接通信。总线系统1404除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图14中将各种总线都标为总 线系统1404。其中,第一网络接口1401,用于在与其他外部网元之间进行收发信息过程中,信号的接收和发送;
第一存储器1402,用于存储能够在第一处理器1403上运行的计算机程序;
第一处理器1403,用于在运行所述计算机程序时,执行:
接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示;其中,所述业务专用承载的切换指示,用于指示需要将业务专用承载由5G切换至4G或2/3G的业务,或者用于指示将整个业务系统由5G切换至4G或2/3G;
从预存的关于UE的业务支持能力指示信息中获取所述UE的业务支持能力指示信息;
基于所述UE的业务支持能力指示信息,针对所述请求信息或所述切换指示发送系统切换请求消息。
可以理解,本发明实施例中的第一存储器1402可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DRRAM)。 本文描述的系统和方法的第一存储器1402旨在包括但不限于这些和任意其它适合类型的存储器。
而第一处理器1403可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法的各步骤可以通过第一处理器1403中的硬件的集成逻辑电路或者软件形式的指令完成。上述的第一处理器1403可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于第一存储器1402,第一处理器1403读取第一存储器1402中的信息,结合其硬件完成上述方法的步骤。
可以理解的是,本文描述的这些实施例可以用硬件、软件、固件、中间件、微码或其组合来实现。对于硬件实现,处理单元可以实现在一个或多个专用集成电路(Application Specific Integrated Circuits,ASIC)、数字信号处理器(Digital Signal Processing,DSP)、数字信号处理设备(DSP Device,DSPD)、可编程逻辑设备(Programmable Logic Device,PLD)、现场可编程门阵列(Field-Programmable Gate Array,FPGA)、通用处理器、控制器、微控制器、微处理器、用于执行本申请所述功能的其它电子单元或其组合中。
对于软件实现,可通过执行本文所述功能的模块(例如过程、函数等)来实现本文所述的技术。软件代码可存储在存储器中并通过处理器执行。存储器可以在处理器中或在处理器外部实现。
具体来说,网络装置130中的第一处理器1403还配置为运行所述计算机程序时,执行前述实施例一中所述的方法步骤,这里不再进行赘述。
实施例六
基于前述实施例相同的发明构思,参见图15,其示出了本发明实施例提供的一种网络装置150的组成,该网络装置150能够实现5G网络架构中AMF的功能,该网络装置150可以包括:第二接收部分1501和第二发送部分1502;其中,
所述第二接收部分1501,配置为在所述UE的注册过程中,接收由所述UE和/或历史AMF发送的所述UE的业务支持能力指示信息;或者,在所述针对所述UE的会话建立过程中,接收由所述UE发送的所述UE的业务支持能力指示信息;
所述第二发送部分1502,配置为将所述UE的业务支持能力指示信息发送至会话管理功能SMF;其中,所述UE的业务支持能力指示信息用于所述SMF在针对所述UE建立业务专用承载时进行业务承载。
在上述方案中,所述UE的业务支持能力指示信息,包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或用于指示所述UE不需要语音业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息。
在上述方案中,所述第二发送部分1502,配置为将所述UE发送的所述UE的业务支持能力指示信息发送至所述SMF。
在上述方案中,所述第二接收部分1501,配置为接收由所述UE通过无线接入网RAN发送的注册请求Registration Request消息,所述Registration Request消息中携带有所述UE的业务支持能力指示信息;和/或,
接收由所述历史AMF发送的信息响应Information Response消息,所述Information Response消息中携带有所述所述UE的业务支持能力指示信息。
在上述方案中,所述第二发送部分1502,配置为将携带有所述UE的业务支持能力指示信息的N11-Request消息发送至所述SMF。
在上述方案中,所述第二接收部分1501,配置为接收由所述UE发送的协议数据单元PDU会话建立请求PDU Session Establishment Request消息,其中,所述PDU Session Establishment Request消息中携带有所述所述UE的业务支持能力指示信息。
在上述方案中,所述第二发送部分1502,配置为将携带有所述UE的业务支持能力指示信息的会话管理请求SM Request消息发送至所述SMF。
在上述方案中,所述第二接收部分1501,配置为接收所述SMF发送的第一回落指示信息,所述第二发送部分1502,配置为将所述第一回落指示信息发送至下一代无线接入网络NG-RAN;其中,所述第一回落指示信息用于指示所述业务专用承载由5G网络回落至4G网络或将所述业务系统由5G切换至4G;
或者,所述第二接收部分1501,配置为接收所述SMF发送的第二回落指示信息,所述第二发送部分1502,配置为将所述第二回落指示信息发送至所述UE;其中,所述第二回落指示信息用于指示所述业务专用承载由5G网络回落至2G或3G网络或将所述业务系统由5G切换至2G或3G。
在上述方案中,所述第二发送部分1502,还配置为向移动管理实体MME发送所述UE的业务支持能力指示信息;
其中,若接收到所述第一回落指示信息,则所述UE的业务支持能力指示信息包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指 示信息、或用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息表示通过4G网络承载紧急呼叫业务;
若接收到所述第二回落指示信息,则所述UE的业务支持能力指示信息为用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息表示通过2/3G网络承载紧急呼叫业务。
因此,本实施例提供了一种计算机可读介质,该计算机可读介质存储有切换业务承载网络的程序,所述切换业务承载网络的程序被至少一个处理器执行时实现上述实施例二所述的方法的步骤。针对计算机可读介质的具体阐述,参见实施例五中的说明,在此不再赘述。
基于上述网络装置150的组成以及计算机可读介质,参见图16,其示出了本发明实施例提供的一种网络装置150的具体硬件结构,可以包括:
第二网络接口1601、第二存储器1602和第二处理器1603;各个组件通过总线系统1604耦合在一起。可理解,总线系统1604用于实现这些组件之间的连接通信。总线系统1604除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图16中将各种总线都标为总线系统1604。其中,
其中,所述第二网络接口1601,用于在与其他外部网元之间进行收发信息过程中,信号的接收和发送;
第二存储器1602,用于存储能够在第二处理器1603上运行的计算机程序;
第二处理器1603,用于在运行所述计算机程序时,执行:
在所述UE的注册过程中,接收由所述UE和/或历史AMF发送的所述UE的业务支持能力指示信息;或者,在所述针对所述UE的会话建立过程中,接收由所述UE发送的所述UE的业务支持能力指示信息;
将所述UE的业务支持能力指示信息发送至会话管理功能SMF;其中,所述UE的业务支持能力指示信息用于所述SMF在针对所述UE建立业务专用承载时进行系统切换。
可以理解地,本实施例中网络装置150的具体硬件结构中的组成部分,与实施例五中的相应部分类似,在此不做赘述。
具体来说,网络装置150中的第二处理器1603,还配置为运行所述计算机程序时,执行前述实施例二中所述的方法步骤,这里不再进行赘述。
实施例七
基于前述实施例相同的发明构思,参见图17,其示出了本发明实施例提供的一种网络装置170的组成,可以包括:第三接收部分1701、执行部分1702;其中,
所述第三接收部分1701,配置为接收由5G网络架构中的会话管理功能AMF发送的用户设备UE的业务支持能力指示信息;
所述执行部分1702,配置为当所述UE的业务支持能力指示信息为用于指示所述UE需要语音业务且仅支持电路域业务的指示信息时,执行电路域回落CSFB过程。
在上述方案中,所述执行部分1702,配置为向所述UE发送寻呼Paging请求或通知Notification请求;其中,所述寻呼请求或所述通知请求用于指示所述UE执行所述CSFB过程;
向IP多媒体子系统IMS发送关于网络电话VoIP的业务承载建立失败响应。
在上述方案中,所述执行部分1702,配置为向演进型全球陆地无线接入网E-UTRAN发送关于网络电话VoIP的业务承载建立请求;其中,所述业务承载建立请求用于所述E-UTRAN根据当前的网络环境向所述IMS发送业务承载建立拒绝消息后,所述IMS通过SIP消息向所述UE发送关于CSFB的通知消息,其中,所述CSFB的通知消息用于通知所述UE执行所 述CSFB过程。
此外,本实施例还提供了一种计算机可读介质,该计算机可读介质存储有切换业务承载网络的程序,所述切换业务承载网络的程序被至少一个处理器执行时实现上述实施例三所述的方法的步骤。针对计算机可读介质的具体阐述,参见实施例五中的说明,在此不再赘述。
基于上述网络装置170以及计算机可读介质,参见图18,其示出了本发明实施例提供的网络装置170的具体硬件结构,可以包括:
第三网络接口1801、第三存储器1802和第三处理器1803;各个组件通过总线系统1804耦合在一起。可理解,总线系统1804用于实现这些组件之间的连接通信。总线系统1804除包括数据总线之外,还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见,在图18中将各种总线都标为总线系统1804。其中,
其中,所述第三网络接口1801,用于在与其他外部网元之间进行收发信息过程中,信号的接收和发送;
第三存储器1802,用于存储能够在第三处理器1803上运行的计算机程序;
第三处理器1803,用于在运行所述计算机程序时,执行:
接收由5G网络架构中的会话管理功能AMF发送的用户设备UE的业务支持能力指示信息;
当所述UE的业务支持能力指示信息为用于指示所述UE需要语音服务且仅支持电路域业务的指示信息时,执行电路域回落CSFB过程。
可以理解地,本实施例中网络装置170的具体硬件结构中的组成部分,与实施例五中的相应部分类似,在此不做赘述。
具体来说,网络装置170中的第三处理器1803,还配置为运行所述计算机程序时,执行前述实施例三中所述的方法步骤,这里不再进行赘述。
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、 或计算机程序产品。因此,本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述,仅为本发明的较佳实施例而已,并非用于限定本发明的保护范围。
工业实用性
本发明实施例中,SMF可以预先获知UE的业务支持能力指示信息之 后,就能够在UE进行语音业务时,根据UE的业务支持能力指示信息判断该语音业务的承载由5G网络回落至4G网络还是由5G网络回落至2G或3G网络,从而确定发送第一回落指示信息还是第二回落指示信息。这样可以使得UE不会感知到网络侧中业务承载网络的回落,UE也不需要主动判断语音业务的发起方式,从而减少了针对UE进行定制及部署的复杂度,网络侧可根据UE对于业务的支持能力结合网络侧本身的业务支持能力,决定是否触发回落来保障业务连接的成功建立。

Claims (42)

  1. 一种业务承载网络的切换方法,所述方法应用于5G网络架构中的会话管理功能SMF,所述方法包括:
    接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示;其中,所述业务专用承载的切换指示,用于指示需要将业务专用承载由5G切换至4G或2/3G的业务,或者用于指示将整个业务系统由5G切换至4G或2/3G;
    从预存的关于UE的业务支持能力指示信息中获取所述UE的业务支持能力指示信息;
    基于所述UE的业务支持能力指示信息,针对所述请求信息或所述切换指示发送系统切换请求消息。
  2. 根据权利要求1所述的方法,其中,所述UE的业务支持能力指示信息,包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或用于指示所述UE不需要语音业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息。
  3. 根据权利要求2所述的方法,其中,所述基于所述UE的业务支持能力指示信息,针对所述请求信息或所述切换指示发送系统切换请求消息,包括:
    当所述UE的业务支持能力指示信息指示所述UE支持VoIP业务或针对紧急呼叫业务进行承载的网络指示信息表示通过4G网络承载紧急呼叫业务时,通过访问与移动性管理AMF向下一代无线接入网络NG-RAN发送第一回落指示信息;其中,所述第一回落指示信息用于指示所述业务专用承载由5G网络切换至4G网络或将所述业务系统由5G 切换至4G;
    当所述UE的业务支持能力指示信息指示所述UE仅支持电路域业务或针对紧急呼叫业务进行承载的网络指示信息表示通过2/3G网络承载紧急呼叫业务时,通过AMF向所述UE发送第二回落指示信息;其中,所述第二回落指示信息用于指示所述业务专用承载由5G网络回落至2G或3G网络或将所述业务系统由5G切换至2G或3G。
  4. 根据权利要求1所述的方法,其中,所述接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示之前,所述方法还包括:
    在所述UE的注册过程中,接收由AMF发送的所述UE的业务支持能力指示信息。
  5. 根据权利要求4所述的方法,其中,所述接收由AMF发送的所述UE的业务支持能力指示信息,包括:
    接收由所述AMF发送的携带有所述UE的业务支持能力指示信息的N11-Request消息;
    从所述N11-Request消息中解析得到所述UE的业务支持能力指示信息的N11-Request消息。
  6. 根据权利要求1所述的方法,其中,所述接接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示之前,所述方法还包括:
    在针对所述UE的会话建立过程中,接收由AMF和/或统一的数据管理UDM发送的所述UE的业务支持能力指示信息。
  7. 根据权利要求6所述的方法,其中,所述接收由AMF和/或UDM发送的所述UE的业务支持能力指示信息,包括:
    接收由所述AMF发送的携带有所述UE的业务支持能力指示信息的会话管理请求SM Request消息,并从所述SM Request消息中解析得到所 述UE的业务支持能力指示信息;和/或,
    接收由所述UDM发送的携带有所述UE的业务支持能力指示信息的订阅数据响应Subscription data response消息,并从所述Subscription data response消息中解析得到所述UE的业务支持能力指示信息。
  8. 一种切换业务承载网络的方法,所述方法应用于5G网络架构中的会话管理功能AMF,所述方法包括:
    在所述UE的注册过程中,接收由所述UE和/或历史AMF发送的所述UE的业务支持能力指示信息;或者,在所述针对所述UE的会话建立过程中,接收由所述UE发送的所述UE的业务支持能力指示信息;
    将所述UE的业务支持能力指示信息发送至会话管理功能SMF;其中,所述UE的业务支持能力指示信息用于所述SMF在针对所述UE建立业务专用承载时进行系统切换。
  9. 根据权利要求8所述的方法,其中,所述UE的业务支持能力指示信息,包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或用于指示所述UE不需要语音业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息。
  10. 根据权利要求8所述的方法,其中,当接收到由所述UE和所述历史AMF发送的所述UE的业务支持能力指示信息时,将所述UE的业务支持能力指示信息发送至会话管理功能SMF,包括:
    将所述UE发送的所述UE的业务支持能力指示信息发送至所述SMF。
  11. 根据权利要求8所述的方法,其中,在所述UE的注册过程中,接收由所述UE和/或历史AMF发送的所述UE的业务支持能力指示信息,包括:
    接收由所述UE通过无线接入网RAN发送的注册请求Registration  Request消息,所述Registration Request消息中携带有所述UE的业务支持能力指示信息;和/或,
    接收由所述历史AMF发送的信息响应Information Response消息,所述Information Response消息中携带有所述所述UE的业务支持能力指示信息。
  12. 根据权利要求8所述的方法,其中,在所述UE的注册过程中,将所述UE的业务支持能力指示信息发送至会话管理功能SMF,包括:
    将携带有所述UE的业务支持能力指示信息的N11-Request消息发送至所述SMF。
  13. 根据权利要求8所述的方法,其中,在所述针对所述UE的会话建立过程中,接收由所述UE发送的所述UE的业务支持能力指示信息,包括:
    接收由所述UE发送的协议数据单元PDU会话建立请求PDU Session Establishment Request消息,其中,所述PDU Session Establishment Request消息中携带有所述UE的业务支持能力指示信息。
  14. 根据权利要求8所述的方法,其中,在所述针对所述UE的会话建立过程中,将所述UE的业务支持能力指示信息发送至会话管理功能SMF,包括:
    将携带有所述UE的业务支持能力指示信息的会话管理请求SM Request消息发送至所述SMF。
  15. 根据权利要求8所述的方法,其中,在将所述UE的业务支持能力指示信息发送至所述SMF后,所述方法还包括:
    接收所述SMF发送的第一回落指示信息,并将所述第一回落指示信息发送至下一代无线接入网络NG-RAN;其中,所述第一回落指示信息用于指示所述业务专用承载由5G网络回落至4G网络或将所述业务系统由5G切换至4G;
    或者,接收所述SMF发送的第二回落指示信息,并将所述第二回落指示信息发送至所述UE;其中,所述第二回落指示信息用于指示所述业务专用承载由5G网络回落至2G或3G网络或将所述业务系统由5G切换至2G或3G。
  16. 根据权利要求15所述的方法,其中,在接收到所述第一回落指示信息或所述第二回落指示信息后,所述方法还包括:
    向移动管理实体MME发送所述UE的业务支持能力指示信息;
    其中,若接收到所述第一回落指示信息,则所述UE的业务支持能力指示信息包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、或用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息表示通过4G网络承载紧急呼叫业务;
    若接收到所述第二回落指示信息,则所述UE的业务支持能力指示信息为用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息表示通过2/3G网络承载紧急呼叫业务。
  17. 一种切换业务承载网络的方法,所述方法应用于4G网络架构中的移动管理实体MME,所述方法包括:
    接收由5G网络架构中的会话管理功能AMF发送的用户设备UE的业务支持能力指示信息;
    当所述UE的业务支持能力指示信息为用于指示所述UE需要语音业务且仅支持电路域业务的指示信息时,执行电路域回落CSFB过程。
  18. 根据权利要求17所述的方法,其中,所述执行CSFB过程,包括:
    向所述UE发送寻呼Paging请求或通知Notification请求;其中,所述寻呼请求或所述通知请求用于指示所述UE执行所述CSFB过程;
    向IP多媒体子系统IMS发送关于网络电话VoIP的业务承载建立失败响应。
  19. 根据权利要求17所述的方法,其中,所述执行CSFB过程,包括:
    向演进型全球陆地无线接入网E-UTRAN发送关于网络电话VoIP的业务承载建立请求;
    所述E-UTRAN根据当前的网络环境向所述IMS发送承载建立拒绝消息;
    所述IMS通过SIP消息向所述UE发送关于CSFB的通知消息,所述CSFB的通知消息用于通知所述UE执行所述CSFB过程。
  20. 一种网络装置,包括:第一接收部分、获取部分和第一发送部分;其中,
    所述第一接收部分,配置为接收针对用户设备UE的用于建立业务专用承载的请求消息或针对业务专用承载的切换指示;其中,所述业务专用承载的切换指示,用于指示将业务专用承载由5G切换至4G或2/3G,或者用于指示将整个业务系统由5G切换至4G或2/3G;
    所述获取部分,配置为从预存的关于UE的业务支持能力指示信息中获取所述UE的业务支持能力指示信息;
    所述第一发送部分,配置为基于所述UE的业务支持能力指示信息,针对所述请求信息或所述切换指示发送系统切换请求消息。
  21. 根据权利要求20所述的装置,其中,所述UE的业务支持能力指示信息,包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或用于指示所述UE不需要语音业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息。
  22. 根据权利要求21所述的装置,其中,所述第一发送部分,配置为当所述UE的业务支持能力指示信息指示所述UE支持VoIP业务或针对紧急呼叫业务进行承载的网络指示信息表示通过4G网络承载紧急呼叫业务时,通过访问与移动性管理AMF向下一代无线接入网络NG-RAN发送第一回落指示信息;其中,所述第一回落指示信息用于指示所述业务专用承载由5G网络切换至4G网络或将所述业务系统由5G切换至4G;
    当所述UE的业务支持能力指示信息指示所述UE仅支持电路域业务或针对紧急呼叫业务进行承载的网络指示信息表示通过2/3G网络承载紧急呼叫业务时,通过AMF向所述UE发送第二回落指示信息;其中,所述第二回落指示信息用于指示所述业务专用承载由5G网络回落至2G或3G网络或将所述业务系统由5G切换至2G或3G。
  23. 根据权利要求20所述的装置,其中,所述第一接收部分,还配置为:在所述UE的注册过程中,接收由AMF发送的所述UE的业务支持能力指示信息。
  24. 根据权利要求23所述的装置,其中,所述第一接收部分,配置为接收由所述AMF发送的携带有所述UE的业务支持能力指示信息的N11-Request消息;
    从所述N11-Request消息中解析得到所述UE的业务支持能力指示信息的N11-Request消息。
  25. 根据权利要求20所述的装置,其中,所述第一接收部分,还配置为:在针对所述UE的会话建立过程中,接收由AMF和/或统一的数据管理UDM发送的所述UE的业务支持能力指示信息。
  26. 根据权利要求25所述的装置,其中,所述第一接收部分,配置为接收由所述AMF发送的携带有所述UE的业务支持能力指示信息的会话管理请求SM Request消息,并从所述SM Request消息中解析得到所述UE的业务支持能力指示信息;和/或,
    接收由所述UDM发送的携带有所述UE的业务支持能力指示信息的订阅数据响应Subscription data response消息,并从所述Subscription data response消息中解析得到所述UE的业务支持能力指示信息。
  27. 一种网络装置,其中,所述装置包括:第二接收部分和第二发送部分;其中,
    所述第二接收部分,配置为在所述UE的注册过程中,接收由所述UE和/或历史AMF发送的所述UE的业务支持能力指示信息;或者,在所述针对所述UE的会话建立过程中,接收由所述UE发送的所述UE的业务支持能力指示信息;
    所述第二发送部分,配置为将所述UE的业务支持能力指示信息发送至会话管理功能SMF;其中,所述UE的业务支持能力指示信息用于所述SMF在针对所述UE建立业务专用承载时进行系统切换。
  28. 根据权利要求27所述的网络装置,其中,所述UE的业务支持能力指示信息,包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或用于指示所述UE不需要语音业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息。
  29. 根据权利要求27所述的装置,其中,所述第二发送部分,配置为将所述UE发送的所述UE的业务支持能力指示信息发送至所述SMF。
  30. 根据权利要求27所述的装置,其中,所述第二接收部分,配置为接收由所述UE通过无线接入网RAN发送的注册请求Registration Request消息,所述Registration Request消息中携带有所述UE的业务支持能力指示信息;和/或,
    接收由所述历史AMF发送的信息响应Information Response消息,所述Information Response消息中携带有所述所述UE的业务支持能力指 示信息。
  31. 根据权利要求27所述的装置,其中,所述第二发送部分,配置为将携带有所述UE的业务支持能力指示信息的N11-Request消息发送至所述SMF。
  32. 根据权利要求27所述的装置,其中,所述第二接收部分,配置为接收由所述UE发送的协议数据单元PDU会话建立请求PDU Session Establishment Request消息,其中,所述PDU Session Establishment Request消息中携带有所述所述UE的业务支持能力指示信息。
  33. 根据权利要求27所述的装置,其中,所述第二发送部分,配置为将携带有所述UE的业务支持能力指示信息的会话管理请求SMRequest消息发送至所述SMF。
  34. 根据权利要求27所述的装置,其中,所述第二接收部分,配置为接收所述SMF发送的第一回落指示信息,所述第二发送部分,配置为将所述第一回落指示信息发送至下一代无线接入网络NG-RAN;其中,所述第一回落指示信息用于指示所述业务专用承载由5G网络回落至4G网络或将所述业务系统由5G切换至4G;
    或者,所述第二接收部分,配置为接收所述SMF发送的第二回落指示信息,所述第二发送部分,配置为将所述第二回落指示信息发送至所述UE;其中,所述第二回落指示信息用于指示所述业务专用承载由5G网络回落至2G或3G网络或将所述业务系统由5G切换至2G或3G。
  35. 根据权利要求34所述的装置,其中,所述第二发送部分,还配置为向移动管理实体MME发送所述UE的业务支持能力指示信息;
    其中,若接收到所述第一回落指示信息,则所述UE的业务支持能力指示信息包括:用于指示所述UE需要语音业务且仅支持VoIP业务的指示信息、或用于指示所述UE需要语音业务且支持网络电话VoIP业务以及电路域业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信 息表示通过4G网络承载紧急呼叫业务;
    若接收到所述第二回落指示信息,则所述UE的业务支持能力指示信息为用于指示所述UE需要语音业务且仅支持电路域业务的指示信息、或针对紧急呼叫业务进行承载的网络指示信息表示通过2/3G网络承载紧急呼叫业务。
  36. 一种网络装置,其中,所述装置包括:第三接收部分、执行部分;其中,
    所述第三接收部分,配置为接收由5G网络架构中的会话管理功能AMF发送的用户设备UE的业务支持能力指示信息;
    所述执行部分,配置为当所述UE的业务支持能力指示信息为用于指示所述UE需要语音业务且仅支持电路域业务的指示信息时,执行电路域回落CSFB过程。
  37. 根据权利要求36所述的装置,其中,所述执行部分,配置为向所述UE发送寻呼Paging请求或通知Notification请求;其中,所述寻呼请求或所述通知请求用于指示所述UE执行所述CSFB过程;
    向IP多媒体子系统IMS发送关于网络电话VoIP的业务承载建立失败响应。
  38. 根据权利要求36所述的装置,其中,所述执行部分,配置为向演进型全球陆地无线接入网E-UTRAN发送关于网络电话VoIP的业务承载建立请求;其中,所述业务承载建立请求用于所述E-UTRAN根据当前的网络环境向所述IMS发送业务承载建立拒绝消息后,所述IMS通过SIP消息向所述UE发送关于CSFB的通知消息,其中,所述CSFB的通知消息用于通知所述UE执行所述CSFB过程。
  39. 一种网络装置,其中,所述装置包括:第一网络接口,第一存储器和第一处理器;其中,
    所述第一网络接口,用于在与其他外部网元之间进行收发信息过程 中,信号的接收和发送;
    所述第一存储器,用于存储能够在所述第一处理器上运行的计算机程序;
    所述第一处理器,用于在运行所述计算机程序时,执行权利要求1至7任一项所述方法的步骤。
  40. 一种网络装置,其中,所述装置包括:第二网络接口,第二存储器和第二处理器;其中,
    所述第二网络接口,用于在与其他外部网元之间进行收发信息过程中,信号的接收和发送;
    所述第二存储器,用于存储能够在所述第二处理器上运行的计算机程序;
    所述第二处理器,用于在运行所述计算机程序时,执行权利要求8至16任一项所述方法的步骤。
  41. 一种网络装置,其中,所述装置包括:第三网络接口,第三存储器和第三处理器;其中,
    所述第三网络接口,用于在与其他外部网元之间进行收发信息过程中,信号的接收和发送;
    所述第三存储器,用于存储能够在所述第三处理器上运行的计算机程序;
    所述第三处理器,用于在运行所述计算机程序时,执行权利要求17至19任一项所述方法的步骤。
  42. 一种计算机可读介质,所述计算机可读介质存储有切换业务承载网络的程序,所述切换业务承载网络的程序被至少一个处理器执行时实现权利要求1至7中任一项或权利要求8至16中任一项或权利要求17至19中任一项所述的方法的步骤。
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