[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2018176442A1 - 接入方法、网络设备、终端设备和amf设备 - Google Patents

接入方法、网络设备、终端设备和amf设备 Download PDF

Info

Publication number
WO2018176442A1
WO2018176442A1 PCT/CN2017/079236 CN2017079236W WO2018176442A1 WO 2018176442 A1 WO2018176442 A1 WO 2018176442A1 CN 2017079236 W CN2017079236 W CN 2017079236W WO 2018176442 A1 WO2018176442 A1 WO 2018176442A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal device
slice
information
amf
access
Prior art date
Application number
PCT/CN2017/079236
Other languages
English (en)
French (fr)
Inventor
余芳
倪慧
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP17903737.9A priority Critical patent/EP3589027A4/en
Priority to CN201780057158.4A priority patent/CN109716826B/zh
Priority to PCT/CN2017/079236 priority patent/WO2018176442A1/zh
Priority to BR112019019864A priority patent/BR112019019864A2/pt
Publication of WO2018176442A1 publication Critical patent/WO2018176442A1/zh
Priority to US16/588,279 priority patent/US10979887B2/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/06—Registration at serving network Location Register, VLR or user mobility server
    • H04W8/065—Registration at serving network Location Register, VLR or user mobility server involving selection of the user mobility server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data

Definitions

  • the present application relates to communication technologies, and in particular, to an access method, a network device, a terminal device, and an AMF device.
  • Network slicing is a new type of network mode and business model.
  • multiple virtual networks can be segmented on the same broadband network hardware infrastructure, where each virtual network is a network slice.
  • the network slices are logically isolated, so that operators can customize network functions for each network slice according to the needs of the service scenario, so as to realize multiple services while sharing a broadband network hardware infrastructure. Can maintain the relative independence of the business.
  • the terminal device can access different network slices according to its own service requirements.
  • the network slice defined by the 3rd Generation Partnership Project (3GPP) is an end-to-end network composed of an access network, a core network, and a transmission network.
  • a “core network slice” can be viewed as an instantiated core network architecture.
  • the “core network slice” use cases currently considered by the industry include mobile broadband, multimedia, Massive Machine Type Communication (MMTC) and key machines. Critical Machine Type Communication (CMTC), etc.
  • the terminal device can access the core network slice connected to the AMF device through an Access and Mobility Management Function (AMF) device. Since the core network slices connected to different AMF devices may be different, the access network (AN) node device connected to the terminal device may select Network Slice Selection Assistance Information (NSSAI) according to the network device of the terminal device. , select the AMF device to access for the terminal device.
  • the NSSAI may include: Slice/Service Type (SST) information supported by the terminal device. In this way, the terminal device can access the core network slice corresponding to the service through the AMF device selected by the AN node device to transmit the service through the core network slice when transmitting the different services.
  • SST Slice/Service Type
  • the AMF device selected by the AN node device may not meet the requirements of the terminal device in actual use, and the AMF device is reselected in the terminal device communication process, so that the signaling overhead is large and the communication efficiency is low. .
  • the present application provides an access method, a network device, a terminal device, and an AMF device, which are used to solve the problem that the AMF device selected by the AN node device cannot meet the actual use of the terminal device in the prior art, and needs to be in the terminal device communication process.
  • An access method a network device, a terminal device, and an AMF device, which are used to solve the problem that the AMF device selected by the AN node device cannot meet the actual use of the terminal device in the prior art, and needs to be in the terminal device communication process.
  • Medium reselection of AMF equipment resulting in technical problems of large signaling overhead and low communication efficiency.
  • the application provides an access method, where the method includes:
  • the network device acquires first information, where the first information is used to indicate a slice/service type SST of a slice that the terminal device allows access, and a radio access technology RAT type that is allowed to be used when accessing the slice that is allowed to access ;
  • the network device acquires second information, where the second information is used to indicate an SST of a slice to which the access and mobility management function AMF device is connected, and a RAT type supported by the slice to which the AMF device is connected;
  • the network device selects, according to the first information and the second information, a first AMF device that serves the terminal device.
  • the network device selects the AMF for the terminal device, not only the SST of the slice that the terminal device is allowed to access but also the RAT that is allowed to be used when the terminal device accesses the slice that is allowed to access is considered.
  • the type such that the first AMF selected by the network device for the terminal device can support the terminal device to access different slices using multiple types of RATs, without the use of slices that are not considered for access to the terminal device.
  • the RAT type may cause the terminal device to access the AMF when the terminal device is initially accessed.
  • the terminal device may use multiple types of RATs to access different slices, and the process of reselecting the AMF for the terminal device during the terminal device communication process may be performed. . Therefore, the method of the present application can reduce the probability of reselecting the AMF for the terminal device, thereby reducing signaling overhead and improving communication efficiency.
  • the network device is an access network node device, and the network device obtains the first information, including:
  • the network device acquires first network slice selection assistance information from the terminal device, where the first network slice selection assistance information includes the first information; or
  • the network device acquires second network slice selection assistance information from the second AMF device, where the second network slice selection assistance information includes the first information.
  • the manner in which the network device acquires the first information is flexible, so that the network device can be allowed based on the SST of the slice that the terminal device allows access, and when accessing the slice allowed to access.
  • the RAT type used to select AMF for the terminal device can reduce the probability of reselecting the AMF for the terminal device, thereby reducing signaling overhead and improving communication efficiency.
  • the acquiring, by the network device, the first network slice selection assistance information from the terminal device includes:
  • the network device receives a first request message from the terminal device, where the first request message carries the first network slice selection auxiliary information, and the first network slice selection auxiliary information is configured network slice selection assistance. Information or accepted network slice selection assistance information.
  • the network device may select the access for the terminal device according to the first information included in the first NSSAI carried in the first request message.
  • the first AMF can reduce the probability of reselecting AMF for the terminal device, thereby reducing signaling overhead and improving communication efficiency.
  • the second network slice selection assistance information selects auxiliary information for the accepted network slice.
  • the network device obtains the second information, including:
  • the network device acquires the second information from an access network domain management device.
  • the access method provided by the possible design enables the network device to obtain the second information in a flexible manner, so that the network device can be allowed based on the SST of the slice that the terminal device allows access, and when accessing the slice allowed to access.
  • the network device is a second AMF device, and the network device acquires the first information, include:
  • the network device determines the first information according to the subscription information of the terminal device.
  • the subscription information includes an SST of a slice subscribed by the terminal device, and a RAT type that is allowed to be used when accessing the subscribed slice;
  • the subscription information includes an SST of a slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the network device selects the first AMF device that serves the terminal device according to the first information and the second information, including:
  • the network device matches the first information and the second information, selects an SST that supports the terminal device to allow access, and a RAT type AMF device that is allowed to be used when accessing the SST that is allowed to access Said first AMF device.
  • the application provides an access method, where the method includes:
  • the access and mobility management function AMF device receives, from the access network node device, a first request message sent by the terminal device, where the first request message carries an identifier of the terminal device;
  • the AMF device acquires subscription information corresponding to the identifier of the terminal device from the subscription database according to the identification information of the terminal device;
  • a slice/service type SST of a slice that the terminal device is allowed to access Determining, according to the subscription information, a slice/service type SST of a slice that the terminal device is allowed to access, and a radio access technology RAT type that is allowed to be used when accessing the slice that is allowed to access;
  • the AMF device sends a first accept message to the terminal device, where the first accept message includes: an SST of a slice that the terminal device allows access, and an allowed use when accessing the slice that is allowed to access RAT type.
  • the AMF device may determine, according to the subscription information, the authentication of the terminal device based on the subscription information acquired from the subscription database.
  • the SST of the slice that the device allows access, and the RAT type that is allowed to be used when accessing the slice that is allowed to access, and the slice requested by the AMF device can improve the efficiency of accessing the slice, and the accuracy of the access slice. .
  • the subscription information includes an SST of a slice subscribed by the terminal device, and a RAT type that is allowed to be used when accessing the subscribed slice;
  • the subscription information includes an SST of a slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the method further includes:
  • the AMF device receives, from the access network node device, a second request message sent by the terminal device, where the second request message is used to indicate that the terminal device is to access the sliced SST, and access the slice to be accessed.
  • the AMF device receives the terminal device for indicating the terminal
  • the SST of the device to be accessed and the second request message of the RAT type used when accessing the slice to be accessed may be the terminal device based on the SST of the slice to be accessed and the RAT type used to access the slice. Choosing the right slice improves the accuracy of the slice access.
  • the application provides an access method, where the method includes:
  • the terminal device sends a first request message to the access and mobility management function AMF device by using the access network node device, where the first request message carries the identifier information of the terminal device;
  • the access network node device Receiving, by the access network node device, the first accept message sent by the AMF device, where the first accept message includes: a slice/service type SST of a slice that the terminal device is allowed to access, and The type of radio access technology RAT that is allowed to be used when accessing the slice that is allowed to access.
  • the terminal device may receive the SST carrying the slice allowed to be accessed by the terminal device, and allow access when accessing the slice allowed for access a first accept message of the RAT type, such that the terminal device can request access to the AMF device based on the SST of the slice that the terminal device is allowed to access, and the RAT type that is allowed to be used when accessing the slice that is allowed to access,
  • the efficiency of access slicing can be improved, as well as the accuracy of access slicing.
  • the first request message further includes: first network slice selection assistance information
  • the first network slice selection assistance information is configured network slice selection assistance information or accepted network slice selection assistance information.
  • the application provides an access method, where the method includes:
  • the access and mobility management function AMF device receives, from the access network node device, a first request message sent by the terminal device, where the first request message carries the identification information of the terminal device;
  • the AMF device acquires subscription information of the terminal device from a subscription database according to the identification information of the terminal device;
  • the AMF device Determining, by the AMF device, the first information according to the subscription information of the terminal device, where the first information is used to indicate a slice/service type SST of a slice that the terminal device is allowed to access, and accessing the The radio access technology RAT type that is allowed to be used when accessing the slice is allowed;
  • the AMF device If the AMF device is unable to provide services to the terminal device, the AMF device triggers an AMF device reselection operation.
  • the AMF device may acquire the subscription information of the terminal device to acquire the slice/service type of the slice that the terminal device allows access through the subscription information.
  • SST and a radio access technology RAT type that is allowed to be used when accessing the slice that is allowed to access, and then, based on the information, determining that the terminal device cannot be served, the AMF device may trigger to reselect the AMF device for the terminal device.
  • the subscription information includes an SST of a slice subscribed by the terminal device, and a RAT type that is allowed to be used when accessing the subscribed slice;
  • the subscription information includes an SST of a slice that the terminal device is allowed to access, and accessing the allowed connection The type of RAT allowed when entering the slice.
  • the AMF device triggers an AMF device reselection operation, including:
  • the AMF device reselects the AMF device for the terminal device according to the first information
  • the AMF device sends a third request message to the second AMF device, where the third request message is used to instruct the second AMF device to reselect the AMF device for the terminal device; or
  • the AMF device sends a reject message to the access network node device, where the reject message is used to instruct the access network node device to reselect the AMF device for the terminal device.
  • the manner of reselecting the operation of the AMF device for the terminal device is flexible, and the terminal device can be ensured to access the supporting terminal device to access different slices by using multiple types of RATs.
  • the probability of reselecting the AMF for the terminal device during the communication process of the terminal device is reduced, thereby reducing signaling overhead and improving communication efficiency.
  • the application provides a network device, where the network device includes:
  • a first acquiring module configured to acquire first information, where the first information is used to indicate a slice/service type SST of a slice that the terminal device allows access, and a wireless that is allowed to be used when accessing the slice that is allowed to access Access technology RAT type;
  • a second acquiring module configured to acquire second information, where the second information is used to indicate an SST of a slice to which the access and mobility management function AMF device is connected, and a RAT type supported by the slice to which the AMF device is connected ;
  • a selection module configured to select, according to the first information and the second information, a first AMF device that serves the terminal device.
  • the network device is an access network node device
  • the first acquiring module is configured to acquire, by the terminal device, first network slice selection auxiliary information, where the first network slice selection auxiliary information includes the first information; or, obtain a second information from the second AMF device.
  • the network slice selects the auxiliary information, and the second network slice selection auxiliary information includes the first information.
  • the first acquiring module is configured to receive a first request message from the terminal device, where the first request message carries the first network slice selection auxiliary information,
  • the first network slice selection assistance information selects auxiliary information for the configured network slice or the accepted network slice selection assistance information.
  • the second network slice selection assistance information selects auxiliary information for the accepted network slice.
  • the second acquiring module is specifically configured to acquire the second information from the AMF device, or obtain the second information from an access network domain management device.
  • the network device is a second AMF device
  • the first acquiring module is configured to acquire the subscription information of the terminal device from the subscription database, and determine the first information according to the subscription information of the terminal device.
  • the subscription information includes an SST of a slice subscribed by the terminal device, and a RAT type that is allowed to be used when accessing the subscribed slice;
  • the subscription information includes an SST of a slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the selecting module is specifically configured to match the first information and the second information, select an SST that supports the terminal device to allow access, and access the allowed access.
  • the application provides an access and mobility management function AMF device, where the AMF device includes:
  • a first receiving module configured to receive, by the access network node device, a first request message sent by the terminal device, where the first request message carries an identifier of the terminal device;
  • An obtaining module configured to acquire, according to the identifier information of the terminal device, the subscription information corresponding to the identifier of the terminal device from the subscription database;
  • a determining module configured to determine, according to the subscription information, a slice/service type SST of a slice that the terminal device is allowed to access, and a radio access technology RAT type that is allowed to be used when accessing the slice that is allowed to access;
  • a sending module configured to send a first accept message to the terminal device, where the first accept message includes: an SST of a slice that the terminal device allows access, and an allowed use when accessing the slice that is allowed to access RAT type.
  • the subscription information includes an SST of a slice subscribed by the terminal device, and a RAT type that is allowed to be used when accessing the subscribed slice;
  • the subscription information includes an SST of a slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the AMF device further includes:
  • a second receiving module configured to receive, after the sending module sends an accept message to the terminal device, a second request message sent by the terminal device from the access network node device, where the second request message is used to indicate Describe the SST of the slice to be accessed by the terminal device, and the type of the RAT used when accessing the slice to be accessed;
  • a selection module configured to select, according to the second request message, an SST of a slice to which the AMF device is connected, and a RAT type supported by a slice to which the AMF device is connected, to select a slice that provides a service for the terminal device.
  • the application provides a terminal device, where the terminal device includes:
  • a sending module configured to send, by the access network node device, a first request message to the access and mobility management function AMF device, where the first request message carries the identifier information of the terminal device;
  • a receiving module configured to receive, by using the access network node device, a first accept message sent by the AMF device, where the first accept message includes: a slice/service type SST of a slice that the terminal device allows to access, and The type of radio access technology RAT that is allowed to be used when accessing the slice that is allowed to access.
  • the first request message further includes: first network slice selection assistance information
  • the first network slice selection assistance information is configured network slice selection assistance information or accepted network slice selection assistance information.
  • the present application provides an access and mobility management function AMF device, where the AMF device includes:
  • a receiving module configured to receive, by the access network node device, a first request message sent by the terminal device, where the first request message carries the identifier information of the terminal device;
  • An obtaining module configured to acquire, according to the identifier information of the terminal device, the sign of the terminal device from a subscription database Information
  • a first determining module configured to determine, according to the subscription information of the terminal device, the first information, where the first information is used to indicate a slice/service type SST of a slice that the terminal device is allowed to access, and a radio access technology RAT type that is allowed to be used when entering the slice that is allowed to access;
  • a second determining module configured to determine, according to the first information, an SST of a slice to which the AMF device is connected, and a RAT type supported by a slice to which the AMF device is connected, whether the AMF device can be the terminal device Provide services;
  • a triggering module configured to trigger an AMF device reselection operation when the AMF device cannot provide a service for the terminal device.
  • the subscription information includes an SST of a slice subscribed by the terminal device, and a RAT type that is allowed to be used when accessing the subscribed slice;
  • the subscription information includes an SST of a slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the triggering module is specifically configured to: reselect an AMF device for the terminal device according to the first information; or send a third request message to the second AMF device, where the third request message is used. Instructing the second AMF device to reselect the AMF device for the terminal device; or sending a reject message to the access network node device, where the reject message is used to indicate that the access network node device is the terminal device Reselect the AMF device.
  • the application provides a network device, including: a processor, a memory, a receiver, and a transmitter; the receiver and the transmitter are both coupled to the processor, and the processor controls the receiving Receiving action of the device, the processor controlling a sending action of the transmitter;
  • the memory is for storing computer executable program code, the program code comprising instructions; when the processor executes the instructions, the instructions cause the network device to perform the access method of any of the first aspect and the possible implementations of the first aspect .
  • the present application provides an access and mobility management function AMF device, including: a processor, a memory, a receiver, and a transmitter; the receiver and the transmitter are coupled to the processor, The processor controls a receiving action of the receiver to control a sending action of the transmitter;
  • the memory is for storing computer executable program code, the program code comprising instructions; when the processor executes the instructions, the instructions cause the AMF device to perform the access method of any of the possible embodiments of the second aspect and the second aspect .
  • the application provides a terminal device, including: a processor, a memory, a receiver, and a transmitter; the receiver and the transmitter are coupled to the processor, and the processor controls the receiving The receiving action of the device controls the sending action of the transmitter;
  • the memory is for storing computer executable program code, the program code comprising instructions; when the processor executes the instructions, the instructions cause the terminal device to perform the access method according to any of the third aspect and the third aspect of the possible embodiments .
  • the present application provides an access and mobility management function AMF device, including: a processor, a memory, a receiver, and a transmitter; the receiver and the transmitter are coupled to the processor, The processor controls a receiving action of the receiver to control a sending action of the transmitter;
  • the memory is for storing computer executable program code, the program code comprising instructions; when the processor executes the instructions, the instructions cause the AMF device to perform the access method of any of the possible implementations of the fourth aspect and the fourth aspect .
  • a thirteenth aspect of the present application provides a network device comprising at least one processing element (or chip) for performing the method of the above first aspect.
  • a fourteenth aspect of the present application provides an access and mobility management function AMF device comprising at least one processing element (or chip) for performing the method of the above second aspect.
  • a fifteenth aspect of the present application provides a terminal device comprising at least one processing element (or chip) for performing the method of the above third aspect.
  • a sixteenth aspect of the present application provides an access and mobility management function AMF device, comprising at least one processing element (or chip) for performing the method of the above fourth aspect.
  • a seventeenth aspect of the present application provides a program for performing the method of the above first aspect when executed by a processor.
  • the eighteenth aspect of the present application provides a program for performing the method of the above second aspect when executed by a processor.
  • a nineteenth aspect of the present application provides a program for performing the method of the above third aspect when executed by a processor.
  • a twentieth aspect of the present application provides a program for performing the method of the above fourth aspect when executed by a processor.
  • a twenty-first aspect of the present application provides a program product, such as a computer readable storage medium, comprising the program of the seventeenth aspect.
  • a twenty-second aspect of the present application provides a program product, such as a computer readable storage medium, comprising the program of the eighteenth aspect.
  • a twenty-third aspect of the present application provides a program product, such as a computer readable storage medium, comprising the program of the nineteenth aspect.
  • a twenty-fourth aspect of the present application provides a program product, such as a computer readable storage medium, comprising the program of the twentieth aspect.
  • a twenty-fifth aspect of the present application provides a computer readable storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the method of the first aspect described above.
  • a twenty-sixth aspect of the present application provides a computer readable storage medium having stored therein instructions that, when executed on a computer, cause the computer to perform the method of the second aspect described above.
  • a twenty-seventh aspect of the present application provides a computer readable storage medium having stored therein instructions that, when run on a computer, cause the computer to perform the method of the above third aspect.
  • a twenty-eighth aspect of the present application provides a computer readable storage medium having stored therein instructions that, when run on a computer, cause the computer to perform the method of the above fourth aspect.
  • the access method, the network device, the terminal device, and the AMF device provided by the present application when selecting the AMF for the terminal device, not only consider the SST of the slice that the terminal device is allowed to access, but also consider the slice that the terminal device accesses to allow access.
  • the type of RAT that is allowed to be used so that the first AMF selected for the terminal device can support the terminal device to access different slices using multiple types of RATs, without the presence of slices that are allowed to access because the terminal device access is not considered.
  • the RAT type that is allowed to be used may cause the terminal device to access the AMF when the terminal device is initially accessed. Process. Therefore, the access method, the network device, the terminal device, and the AMF provided by the present application can reduce the probability of reselecting the AMF for the terminal device, thereby reducing signaling overhead and improving communication efficiency.
  • 1 is a schematic diagram of a core network slice
  • FIG. 2 is a schematic diagram of a scenario in which a terminal device accesses a core network slice
  • FIG. 3 is a schematic diagram of a communication system provided by the present application.
  • FIG. 5 is a schematic flowchart diagram of another access method provided by the present application.
  • FIG. 6 is a schematic flowchart diagram of still another access method provided by the present application.
  • FIG. 7 is a schematic flowchart diagram of still another access method provided by the present application.
  • FIG. 8 is a schematic flowchart diagram of still another access method provided by the present application.
  • FIG. 9 is a schematic flowchart diagram of still another access method provided by the present application.
  • FIG. 10 is a schematic flowchart diagram of still another access method provided by the present application.
  • FIG. 11 is a schematic structural diagram of a network device according to the present application.
  • FIG. 12 is a schematic structural diagram of an AMF device provided by the present application.
  • FIG. 13 is a schematic structural diagram of a terminal device according to the present application.
  • FIG. 14 is a schematic structural diagram of another AMF device provided by the present application.
  • 15 is a schematic structural diagram of another network device provided by the present application.
  • FIG. 16 is a schematic structural diagram of still another AMF device provided by the present application.
  • 17 is a schematic structural diagram of another terminal device provided by the present application.
  • FIG. 18 is a schematic structural diagram of another terminal device provided by the present application.
  • FIG. 19 is a structural block diagram of a terminal device provided by the application as a mobile phone.
  • plural means two or more.
  • “and/or” describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/” generally indicates that the contextual object is an "or" relationship.
  • An AN node device can be a base station or an access point (AP).
  • Base station A Radio Access Network (RAN) device is a device that connects a terminal to a wireless network, and can be a Global System of Mobile communication (GSM) or a Code Division Multiple Access (Code Division Multiple Access).
  • GSM Global System of Mobile communication
  • Code Division Multiple Access Code Division Multiple Access
  • the Base Transceiver Station (BTS) in CDMA) may also be a base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), or may be a Long Term Evolution (LTE).
  • the evolved base station (Evolutional Node B, eNB or eNodeB), or the relay station or the access point, or the base station in the future 5G network, etc., is not limited herein.
  • Terminal device may be a wireless terminal or a wired terminal, the wireless terminal may be a device that provides voice and/or other service data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem. .
  • the wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • RAN Radio Access Network
  • it may be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with a wireless access network.
  • RAN Radio Access Network
  • the wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, and a remote terminal.
  • the access terminal, the user terminal (User Terminal), the user agent (User Agent), and the user device (User Device or User Equipment) are not limited herein.
  • the terminal device may also be a vehicle in a communication between a vehicle and a vehicle in a vehicle-to-vehicle (V2V) communication.
  • V2V vehicle-to-vehicle
  • FIG. 1 is a schematic diagram of a core network slice.
  • multiple virtual networks can be segmented on the same set of broadband network hardware infrastructure located on the core network.
  • Each virtual network is treated as a core network slice (referred to as a slice), and each slice supports the transmission of data of one service using one or more Radio Access Technology (RAT).
  • RAT Radio Access Technology
  • the slice described above may be, for example, a Critical Machine Type Communication Slice (Critical MTC Slice), a Massive Machine Type Communication Slice (Massive MTC Slice), or a Mobile Broadband Slice (Mobile). Broadband Slice, MBB Slice), Ultra-reliable and low latency communications slice (URLLC Slice), Multimedia Broadcast Multicast Service Slice (MBMS Slice).
  • FIG. 1 is a schematic diagram showing an example in which one Critical MTC Slice, two Massive MTC Slices, and one MBB Slice are sliced on the same broadband network hardware infrastructure.
  • the RAT mentioned above may be, for example, a Wireless Local Area Networks (WLAN), a Universal Mobile Telecommunications System (UMTS), a UMTS Terrestrial Radio Access Network (UTRAN), and a global mobile network.
  • WLAN Wireless Local Area Networks
  • UMTS Universal Mobile Telecommunications System
  • UTRAN Universal Mobile Telecommunications System
  • GSM Global System for Mobile Communication
  • EDGE Enhanced Data Rate for GSM Evolution
  • GSM GSM Radio Access Network GERAN
  • EUTRAN Enhanced Universal Terrestrial Radio Access Evolved Universal Terrestrial Radio Access Network
  • the RAT is a 3GPP access technology (for example, UMTS, UTRAN, GSM, etc.)
  • the AN node device corresponding to the RAT may be a Radio Access Network (RAN).
  • RAN Radio Access Network
  • FIG. 1 is a schematic diagram of a core network slice taken as an example of a RAN and an AP.
  • Each AMF device can be connected to multiple slices, and the slices connected to each AMF may be different.
  • the AMF device is used to connect the terminal device that accesses the AMF device to the slice that the terminal device needs to access.
  • a scenario in which a terminal device can simultaneously access multiple slices is proposed, and one or more core network devices, such as an AMF device, can be shared among the multiple slices.
  • the AN node device can select the accessed AMF device for the terminal device according to the network slice selection assistance information (NSSAI) of the terminal device.
  • NSSAI network slice selection assistance information
  • the NSSAI may include: a Slice/Service Type (SST) of one or more slices that the terminal device allows access, and supplementary information for distinguishing slices with the same SST, for example: tenant identity.
  • Tenant Identification the group ID to which the terminal device belongs, and so on.
  • the AN node device determines the AMF device to be accessed for the terminal device in the above manner, it is only based on the SST supported by the terminal device, and does not consider the RAT used when the terminal device accesses the slice. Therefore, there may be the following:
  • FIG. 2 is a schematic diagram of a scenario in which a terminal device accesses a core network slice.
  • the terminal device supports the voice service and the Internet access service, and the terminal device supports the 3GPP and WLAN wireless access technologies, wherein the slice corresponding to the voice service is a Voice over Internet Protocol Slice (VoIP Slice).
  • the slice corresponding to the Internet service is an enhanced mobile broadband slice (eMBB Slice). That is to say, the slice that the terminal device allows access includes: VoIP Slice and eMBB Slice.
  • the SST included in the NSSAI of the terminal device is VoIP and eMBB.
  • the terminal device uses the 3GPP to perform the voice service. After the terminal device accesses the RAN by using the 3GPP access technology, the RAN does not consider the RAT that may be used when the terminal device accesses other slices. Therefore, the RAN selects and connects to the VoIP slice supporting the 3GPP access technology and the AMB device supporting the 3GPP eMBB slice for the terminal device based on the NSSAI of the terminal device, and the AMF device is not connected to the eMBB slice supporting other wireless access technologies. . In this example, it is assumed that the currently selected AMF device is an AMF-1 device. At this time, the terminal device performs voice service through the VoIP slice connected to the AMF-1 device.
  • the AMF-1 device is not connected to the WLAN-enabled eMBB slice. If the terminal device is using the WLAN to perform the Internet service while the voice service is being performed, the terminal device uses the WLAN to access the AP. The eMBB slice, so the AMF-1 device cannot connect the terminal device to the appropriate eMBB slice. In this case, in order to enable the terminal device to access multiple slices supported by the same AMF device, it is necessary to reselect a VoIP slice and a WLAN-enabled eMBB slice capable of simultaneously supporting the 3GPP access technology for the terminal device. The AMF device reconnects the terminal device to the reselected AMF. In this example, the reselected AMF device is an AMF-2 device.
  • the terminal device can access the VoIP slice supporting the 3GPP access technology through the AMF-2 device by using the 3GPP access technology, and access the WLAN-enabled eMBB slice through the AMF-2 device by using the WLAN, so that multiple slices can be shared.
  • the purpose of an AMF device is not limited to, but not limited to, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, Wi-Fi, etc.
  • the AeNB device that is initially accessed by the terminal device determines the AMF device to be accessed for the terminal device in the foregoing manner, it is only based on the SST of the slice that the terminal device allows access, and does not consider the terminal device connection.
  • the RAT used when entering the slice Therefore, when the terminal device accesses a plurality of slices using different RATs, the case of AMF reselection as shown in the above example occurs.
  • the method of reselecting the AMF can enable the terminal device to access multiple slices simultaneously through the same AMF, in the terminal device communication process, the AMF reselection is performed, so that the signaling overhead is large and the communication efficiency is low.
  • the present application proposes an access method in which, when selecting a AMF device for a terminal device, the network device considers not only the SST of the slice that the terminal device is allowed to access, but also the access of the terminal device.
  • the RAT used for accessing the slice so that the AMF selected by the network device for the terminal device can support the terminal device to access different slices by using multiple RATs, thereby reducing the probability of AMF reselection in the communication process of the terminal device.
  • the signaling overhead is reduced and the communication efficiency is improved.
  • the access method provided by the present application is to solve the problem in the prior art that an AMN device selects an AMF device for the terminal device only through the NSSAI of the terminal device, which causes a reselection of the AMF device during the communication process of the terminal device, so that Technical problems with large signaling overhead and low communication efficiency.
  • FIG. 3 is a schematic diagram of a communication system provided by the present application.
  • the communication system includes: a terminal device, an AN node device, a default AMF device, at least one AMF device, and a subscription database.
  • 3 shows a communication system including an AMF device as an example, but those skilled in the art can understand that the communication system can include a plurality of AMF devices, and each AMF device is connected to other devices in the communication system.
  • the method can be referred to as shown in FIG. 3, and details are not described herein again.
  • the AN node device is configured to connect the terminal device to the AMF device.
  • the AN node device in this application is an AN node device accessed by the RAT currently used by the terminal device.
  • the AN node device accessed by the terminal device may be an AP.
  • the AN node device accessed by the terminal device may be the RAN.
  • the default AMF device is an AMF device that is selected for the terminal device after receiving the request message of the terminal device forwarded by the AN node device or other AMF device.
  • Each of the plurality of AMF devices may be connected to a plurality of slices for selecting a specific slice for the terminal device according to the service requirements of the terminal device connected thereto.
  • Each slice connected to the AMF device has a Session Management Function (SMF), a User Plane Function (UPF), and the like.
  • SMF Session Management Function
  • UPF User Plane Function
  • the slice mentioned here is used to process and transmit the service corresponding to the slice.
  • the subscription information of the terminal device is stored in the subscription database, and is used to provide subscription information of the terminal device for the default AMF device and the multiple AMF devices.
  • the foregoing communication system may be an LTE communication system, or may be other communication systems in the future, and is not limited herein.
  • FIG. 4 is a schematic flowchart diagram of an access method provided by the present application.
  • This embodiment relates to a process in which a network device selects an AMF for a terminal device according to an SST of a slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the network device mentioned herein may be any device on the network side that has the function of selecting an AMF device for the terminal device, for example, an AN node device or an AMF device (for example, a default AMF device or multiple AMF devices mentioned above). Any AMF, etc.), depending on the configuration and network on the network side
  • the functional division of the side devices is determined. As shown in FIG. 4, the method may include:
  • the network device acquires first information, where the first information is used to indicate an SST of a slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the network device can obtain the first information, and the first information can be used to obtain the SST of the slice that the terminal device allows access, and the access allowed to access the slice that is allowed to be accessed.
  • RAT type when the terminal device initially accesses the network, the network device can obtain the first information, and the first information can be used to obtain the SST of the slice that the terminal device allows access, and the access allowed to access the slice that is allowed to be accessed.
  • the AN node device may acquire the first information stored on the AN node device. Alternatively, the AN node device may further obtain the first information by receiving the first information that is sent by the terminal device to the AN node device. For example, the AN node device may acquire the first information carried in the first NSSAI by acquiring the first NSSAI from the terminal device. Alternatively, the AN node device may further acquire the first information from the AMF device (referred to as the second AMF device) holding the first information. For example, the AN node device may acquire the first information carried in the second NSSAI by acquiring the second NSSAI from the second AMF device.
  • the AMF device referred to as the second AMF device
  • the AMF device may determine the first information and the like according to information acquired from the subscription database. Alternatively, the AMF device may obtain the first information by receiving the first information sent by the terminal device to the AMF device. For example, the AMF device may acquire the first information carried in the first NSSAI by acquiring the first NSSAI from the terminal device. Alternatively, the AMF device may also obtain the first information from other AMF devices that hold the first information. The AMF device may also obtain the first information carried in the second NSSAI by acquiring the second NSSAI from the other AMF devices.
  • the embodiment does not limit how the foregoing first information indicates the SST of the slice that the terminal device allows access, and the RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the foregoing first information may be indicated by the identifier of the SST of the slice that the terminal device is allowed to access, and the identifier of the RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the prior art classification manner may be used.
  • the foregoing RAT type may be any one of the following: UTRAN, GERAN, EUTRAN, Global Area Network (GAN, GAN), enhanced high speed packet.
  • High Speed Packet Access Evolution HSPA Evolution
  • Untrusted WLAN Trusted WLAN
  • the above SST may be any of the following: Enhanced Mobile Broadband (eMBB), Ultra-reliable and low latency communications (URLLC), Massive Internet of Things (MIoT) ), emergency communications (Critical Communications), etc.
  • eMBB Enhanced Mobile Broadband
  • URLLC Ultra-reliable and low latency communications
  • MIoT Massive Internet of Things
  • emergency communications Critical Communications
  • the network device acquires second information, where the second information is used to indicate an SST of the slice to which the AMF device is connected, and a RAT type supported by the connected slice.
  • the network device may further acquire the second information to obtain the SST of the slice connected to the AMF device on the core network side to which the network device can be connected according to the second information, and the AMF device to which the network device can connect The RAT type supported by the connected slice.
  • the network device can obtain the second information stored on the network device.
  • the network device may further obtain, from each AMF device that can be connected, an SST indicating a slice to which the AMF device is connected, and an indication information of a RAT type supported by the slice to which the AMF device is connected, at this time, the network The indication information obtained by the device from the AMF device that can be connected to is the second information.
  • the network device may also obtain the second information from an Access Network Domain Manager (AN Domain Management) device for managing access network devices in the access network domain.
  • AN Domain Management Access Network Domain Manager
  • the embodiment does not limit how the foregoing second information indicates the SST of the slice to which the AMF device is connected, and The RAT type supported by the connected slice.
  • the foregoing second information may be indicated by carrying an identifier of the AMF device, an SST of the slice to which the AMF device is connected, and a RAT type supported by the connected slice.
  • the network device selects, according to the first information and the second information, the first AMF device of the service terminal device for the terminal device.
  • the network device learns, by using the first information, the SST of the slice that the terminal device allows access, and the RAT type that is allowed to be used when accessing the slice that is allowed to access, and the second information is used to learn that each AMF device that can be connected is connected.
  • the network device can select the first AMF device of the service terminal device for the terminal device based on the information, so that the terminal device can Different slices are accessed by the first AMF device using multiple types of RATs.
  • the network device may select an SST that supports the terminal device to allow access by matching the first information and the second information, and the RAT type AMF device that is allowed to be used when accessing the SST that is allowed to access An AMF device.
  • the network device selects the AMF for the terminal device, not only the SST of the slice that the terminal device is allowed to access but also the type of the RAT that the terminal device allows to use when accessing the slice that is allowed to access is considered.
  • the first AMF selected by the network device for the terminal device can support the terminal device to access different slices by using multiple types of RATs, without the RAT allowed to be used when the slice that is allowed to access by the terminal device is not considered.
  • the AMF that is accessed when the terminal device is initially accessed may not be able to meet the terminal device's access to different slices using multiple types of RATs.
  • the process of reselecting the AMF for the terminal device needs to be performed in the terminal device communication process. Therefore, the method of the present application can reduce the probability of reselecting AMF for the terminal device, thereby reducing signaling overhead and improving communication efficiency.
  • FIG. 5 is a schematic flowchart diagram of another access method provided by the present application.
  • the AN node device may obtain the first information carried in the first NSSAI by acquiring the first NSSAI from the terminal device.
  • the AN node device may obtain the first NSSAI by receiving the first NSSAI sent by the terminal device.
  • the AN node device may obtain the first NSSAI by receiving a request message that is sent by the terminal device and carries the first NSSAI.
  • the embodiment relates to the SNS that the AN node device obtains according to the first NSSAI carried in the first request message sent by the terminal device, and the STR type that is allowed to be used when accessing the slice that is allowed to access. And the process of selecting an AMF device for the terminal device.
  • the first NSSAI includes: first information. As shown in FIG. 5, the method may include:
  • the terminal device sends a first request message to the AN node device.
  • the first request message includes: an identifier of the terminal device, a first NSSAI, and the like.
  • the first NSSAI is NSSAI configured or accepted/allowed.
  • the terminal device when the terminal device initially accesses the network, the terminal device may send a first request message to the AN node device.
  • the first request message may include: an identifier of the terminal device, a first NSSAI, and the like.
  • the identifier of the terminal device may be any identifier that can uniquely identify the terminal device, for example, an International Mobile Subscriber Identification Number (IMSI) of the terminal device.
  • IMSI International Mobile Subscriber Identification Number
  • the first NSSAI includes an SST for indicating a slice that the terminal device allows access, and first information of a RAT type that is allowed to be used when accessing a slice that allows access.
  • This embodiment does not limit the content included in the first information in the first NSSAI.
  • the first information may include the content shown in Table 1 below.
  • Each RAT type in the RAT type shown in the foregoing Table 1 may be an identifier of each RAT type, and may also be a preset value corresponding to each RAT type.
  • the relationship between the RAT type and the preset value can be, for example, as shown in Table 2 below.
  • the foregoing Tables 1 and 2 are only an example, and the first information involved in the present application is not limited to the above Table 1 and Table 2, as long as it is an SST capable of indicating a slice allowed to be accessed by the terminal device. And, the first information of the RAT type that is allowed to be used when accessing the slice that is allowed to access is within the protection scope of the present application.
  • the first NSSAI carried in the first request message may be a configured NSSAI, or may be an accepted/allowed NSSAI, and may be determined according to an NSSAI stored by the terminal device.
  • the NSSAI configured here may be a default NSSAI configured on the terminal device.
  • the accepted/allowed NSSAI may be an accepted/allowed NSSAI determined by the end device contracted NSSAI or the network side according to the NSSAI and network side capabilities of the terminal device subscription.
  • the first request message may be a registration request message sent by the terminal device when the registration process is performed, or an attach request message sent when the terminal device performs the attach access process, or sent by the terminal device when performing the location area update process. Location area update request message, etc.
  • the AN node device receives the first request message.
  • the AN node device acquires the second information.
  • the second information is used to indicate the SST of the slice to which the access and mobility management function AMF device is connected, and the RAT type supported by the connected slice.
  • step S102 For a description of the step, refer to the description of step S102, and details are not described herein again.
  • the AN node device selects, as the terminal device, the first service terminal device according to the first information and the second information. AMF equipment.
  • step S103 For a description of the step, refer to the description of step S103, and details are not described herein again.
  • the AN node device completes the process of selecting the first ASF device carried by the first request message sent by the terminal device, and selecting the first AMF device of the serving terminal device for the terminal device.
  • the AN node device may select the access terminal for the terminal device according to the first information included in the first NSSAI carried in the first request message.
  • An AMF Since the AN node device selects the first AMF device for the terminal device, it not only considers the SST of the slice that the terminal device allows access, but also considers the RAT type that the terminal device allows to use when accessing the slice that is allowed to access, thus ensuring The selected first AMF device can support the terminal device to access different slices by using multiple types of RATs without causing the RAT type that is allowed to be used when the terminal device accesses the slice that is allowed to access, and the terminal device is caused.
  • the AMF that is accessed during the initial access may not be able to meet the terminal device's access to different slices using multiple types of RATs, and thus the process of reselecting the AMF for the terminal device during the terminal device communication process needs to be performed. Therefore, the method of the present application can reduce the probability of reselecting AMF for the terminal device, thereby reducing signaling overhead and improving communication efficiency.
  • FIG. 6 is a schematic flowchart diagram of still another access method provided by the present application. This embodiment relates to a process in which an AN node device accesses a terminal device to a first AMF device. As shown in FIG. 6, after the foregoing S204, the method may further include:
  • the AN node device forwards the first request message sent by the terminal device to the first AMF device.
  • the first request message includes: an identifier of the terminal device, a first NSSAI, and the like.
  • the first NSSAI is NSSAI configured or accepted/allowed.
  • the first AMF device receives the first request message.
  • the first AMF device sends a query request message to the subscription database.
  • the query request message includes: an identifier of the terminal device.
  • the AMF device after receiving the first request message forwarded by the AeNB device, the AMF device needs to authenticate the terminal device according to the subscription information of the terminal device to determine whether the terminal device is allowed to access the network. Therefore, after receiving the first request message forwarded by the AN node device, the first AMF device may sign the subscription information of each terminal device according to the identifier of the terminal device carried in the first request message. The database acquires subscription information of the terminal device.
  • the subscription information of each terminal device stored in the subscription database of the present application further includes a third NSSAI of each terminal device.
  • the third NSSAI may include an SST of a slice that is subscribed by the terminal device, and a RAT type that is allowed to be used when accessing the subscribed slice, that is, the third NSSAI may be an NSSAI that the terminal device subscribes to.
  • the third NSSAI may include an SST of a slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access, that is, the third NSSAI may be an allowed/accepted NSSAI of the terminal device.
  • the first AMF device may send, according to the identifier of the terminal device carried in the first request message, a query request message carrying the identifier of the terminal device to the subscription database, Obtaining subscription information of the terminal device, where the subscription information includes a third NSSAI of the terminal device.
  • the subscription database sends a query response message to the first AMF device.
  • the query response message includes: subscription information of the terminal device.
  • the subscription database may search for the subscription information of the third NSSAI corresponding to the identifier of the terminal device in the database, and carry the subscription information in the query response message. Send to the first AMF device.
  • the first AMF device determines the second NSSAI according to the query response message.
  • the first AMF device may sign the third NSSAI carried in the subscription information after receiving the query response message that is sent by the subscription database and carries the subscription information. NSSAI) and network side capabilities to determine the allowed/accepted NSSAI of the terminal device, ie the second NSSAI. If the third NSSAI is the allowed/accepted NSSAI of the terminal device, the first AMF device may receive the third NSSAI carried in the subscription information as the second after receiving the query response message that is sent by the subscription database and carrying the subscription information. NSSAI.
  • the foregoing second NSSAI may include: an SST of a slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the first AMF device determines the allowed/accepted NSSAI of the terminal device according to the NSSAI and the network side capability of the terminal device, refer to the prior art, and details are not described herein again.
  • the first AMF device sends a first accept message to the terminal device.
  • the accept message includes: an SST of a slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the first AMF device may obtain the accurate first information based on the second NSSAI, and may carry the first information in the first accept message, and send the information to the terminal device through the AN node device.
  • the first receiving message may carry the first information, a temporary identifier allocated by the first AMF device for the terminal device, and the like.
  • the terminal device may store the information to carry some or all of the information in the subsequent signaling interaction process.
  • the first AMF device may further obtain the accurate first information, the SST of the slice connected to the first AMF device, and the slice connected by the first AMF device, based on the second NSSAI.
  • the supported RAT type determines whether the first AMF device can provide services for the terminal device. That is, it is determined whether the first AMF device supports the SST that the terminal device allows access, and the RAT type that is allowed to be used when accessing the SST allowed to access.
  • the first AMF device transmits a first accept message to the terminal device when it is determined that the terminal device can be served.
  • the SST supported by the first AMF device and the RAT type supported by the slice connected to the first AMF device may be preset on the first AMF device, or may be the first AMF device from the access network domain. Manage the devices and so on.
  • the access method provided by the present application after selecting the first AMF device for the terminal device, the AN node device can access the terminal device to the first AMF device, so that the terminal device can use multiple types of RATs, and pass the first AMF.
  • the device accesses different slices without the RAT type that is allowed to be used when the terminal device accesses the slice that is allowed to access.
  • the AMF that is accessed when the terminal device is initially accessed may not be able to meet the terminal device.
  • the type of RAT accesses different slices, and thus needs to perform a process of reselecting the AMF for the terminal device. Therefore, the method of the present application can reduce the probability of reselecting the AMF for the terminal device in the communication process of the terminal device, thereby reducing the signaling overhead and improving the communication efficiency.
  • FIG. 7 is a schematic flowchart diagram of still another access method provided by the present application. As shown in FIG. 7, this embodiment relates to the upper After the accessing of the first AMF device by the terminal device, how to access the slice by the first AMF device, after the foregoing S305, the method may further include:
  • the terminal device sends a second request message to the AN node device.
  • the second request message is used to indicate the SST of the slice to be accessed by the terminal device, and the RAT type used when accessing the slice to be accessed.
  • the second request message may be a session request message or the like.
  • the terminal device to be accessed is any one of the slices allowed to be accessed by the terminal device.
  • the terminal device may send a second request message to the AN node.
  • the embodiment does not limit the manner in which the second request message indicates that the terminal device is to access the sliced SST, and the RAT type that is used when accessing the slice to be accessed.
  • the second request message may include: the terminal device is to be accessed. The sliced SST, and the type of RAT used when accessing the slice to be accessed.
  • the AN node device sends a second request message to the first AMF device.
  • the AN node device when the AN node device forwards the first accept message of the first AMF device to the terminal device, the AN node device may record the mapping relationship between the terminal device and the first AMF device. Therefore, after receiving the second request message, the AN node device may forward the second request message to the first AMF device.
  • the AN node device may forward the second request message to the first AMF device.
  • the first AMF device receives the second request message.
  • the first AMF device selects a slice that provides a service for the terminal device according to the second request message, the SST of the slice to which the first AMF device is connected, and the RAT type supported by the slice to which the first AMF device is connected.
  • the first AMF device may according to the SST of the slice to be accessed by the terminal device indicated by the second request message, and the RAT used when the terminal device accesses the slice to be accessed.
  • the slice supported by the slice with the same RAT type serves the terminal device.
  • the second request message may be sent to the slice serving the terminal device.
  • the slice serving the terminal device can establish a session for the terminal device according to the second request message, and return a second response message to the terminal device by using the first AMF device.
  • the terminal device determines that the service corresponding to the slice can be transmitted through the slice after accessing the slice.
  • the second response message may be, for example, a session response message.
  • the session response message may include: an Internet Protocol (IP) address interconnected by the network of the terminal device, an SST of the slice that the terminal device allows access, and a RAT type used when accessing the slice is allowed to access.
  • IP Internet Protocol
  • the SST of the slice that the terminal device allows to access, and the RAT type used when the access is allowed to access the slice may be the SST of the slice to be accessed by the terminal device indicated in the second request message, and the access to be accessed The type of RAT to use when slicing. It should be noted that the process of providing a service for the terminal device according to the second request message, establishing a session for the terminal device, and returning the second response message to the terminal device by using the first AMF device, may refer to the prior art, and Let me repeat.
  • the terminal device may send an SST indicating that the terminal device is to access the slice to the first AMF device, and the access is to be connected. a second request message of the RAT type used in the slice, so that the first AMF device can be based on the slice to be accessed.
  • the SST and the RAT type used to access the slice select the correct slice for the terminal device, which improves the accuracy of the slice access.
  • FIG. 8 is a schematic flowchart diagram of still another access method provided by the present application.
  • the AN node device may obtain the first information carried in the second NSSAI by acquiring the second NSSAI from the second AMF device.
  • the second AMF device is used as the default AMF device, and the method is that the first node message sent by the terminal device does not carry the first NSSAI including the first information.
  • the AMF device acquires the second NSSAI, acquires the SST of the slice that the terminal device allows access, and the process of accessing the RAT type that is allowed to be used when accessing the slice that is allowed to access, and selecting the AMF device for the terminal device.
  • the method may include:
  • the terminal device sends a first request message to the AN node device.
  • the first request message includes: an identifier of the terminal device.
  • the terminal device may send a first request message to the AN node device.
  • the first request message may include: an identifier of the terminal device, and the like.
  • the identifier of the terminal device may be any identifier that can uniquely identify the terminal device, for example, the IMSI of the terminal device.
  • the foregoing first request message may be a registration request message sent when the terminal device performs the registration process, or an attach request message sent when the terminal device performs the attach access process, or sent by the terminal device when performing the tracking area update process. Tracking area update request message, etc.
  • the AN node device sends a first request message to the default AMF device.
  • the AN node device may send the first request message to the default AMF device to pass the default.
  • the AMF device obtains the first information.
  • the default AMF device sends a query request message to the subscription database.
  • the query request message includes: an identifier of the terminal device.
  • the default AMF device may send a query request message carrying the identifier of the terminal device to the subscription database according to the identifier of the terminal device carried in the first request message.
  • the subscription database sends a query response message to the default AMF device.
  • the query response message includes: subscription information of the terminal device.
  • the default AMF device determines the second NSSAI according to the query response message.
  • steps S504 and S505 refer to steps S304 and S305 above, and details are not described herein again.
  • the default AMF device sends a second NSSAI to the AN node device.
  • the AN node device acquires the second information.
  • the second information is used to indicate the SST of the slice to which the access and mobility management function AMF device is connected, and the RAT type supported by the connected slice.
  • step S102 For a description of the step, refer to the description of step S102, and details are not described herein again.
  • the AN node device selects, by the first information and the second information, the first AMF device of the service terminal device for the terminal device.
  • step S103 For a description of the step, refer to the description of step S103, and details are not described herein again.
  • the AN node device completes the process of selecting the first AMF device of the service terminal device for the terminal device based on the second NSSAI acquired from the second AMF device.
  • the method in this embodiment is applicable not only to the scenario in which the first request message sent by the terminal device does not carry the first NSSAI including the first information, but also to the first request message carrying the first NSSAI.
  • the first NSSAI includes only information for indicating the SST of the slice that the terminal device allows access, and does not include a scenario for indicating information of the RAT type that the terminal device is allowed to use when accessing the slice that is allowed to access, For example, in the prior art, a scenario in which an AMF device is selected for a terminal device.
  • the method may further perform the embodiments as shown in FIG. 6 and FIG. 7 above, and details are not described herein again.
  • the AN node device may acquire the second NSSAI from the default AMF device, and based on the first included in the second NSSAI Information, the first AMF selected for the terminal device to access.
  • the AN node device Since the AN node device selects the first AMF device for the terminal device, it not only considers the SST of the slice that the terminal device allows access, but also considers the RAT type that the terminal device allows to use when accessing the slice that is allowed to access, thus ensuring The selected first AMF device can support the terminal device to access different slices by using multiple types of RATs without causing the RAT type that is allowed to be used when the terminal device accesses the slice that is allowed to access, and the terminal device is caused.
  • the AMF that is accessed during the initial access may not be able to meet the terminal device's access to different slices using multiple types of RATs, and thus the process of reselecting the AMF for the terminal device needs to be performed. Therefore, the method of the present application can reduce the probability of reselecting the AMF for the terminal device in the communication process of the terminal device, thereby reducing the signaling overhead and improving the communication efficiency.
  • FIG. 9 is a schematic flowchart diagram of still another access method provided by the present application.
  • the AMF device may determine the first information according to the information acquired from the subscription database.
  • the AMF device is used as the default AMF device, and the default AMF device determines the first information according to the information obtained from the subscription database when the first request message sent by the terminal device does not carry the first NSSAI.
  • the method may include:
  • the terminal device sends a first request message to the AN node device.
  • the first request message includes: an identifier of the terminal device.
  • the AN node device sends a first request message to the default AMF device.
  • the default AMF device sends a query request message to the subscription database.
  • the query request message includes: an identifier of the terminal device.
  • the subscription database sends a query response message to the default AMF device.
  • the query response message includes: subscription information of the terminal device.
  • the default AMF device determines the second NSSAI according to the query response message.
  • the default AMF device acquires the second information.
  • the second information is used to indicate the SST of the slice to which the access and mobility management function AMF device is connected, and The RAT type supported by the connected slice.
  • step S102 For a description of the step, refer to the description of step S102, and details are not described herein again.
  • the default AMF device selects, by the first information and the second information, the first AMF device of the service terminal device for the terminal device.
  • step S103 For a description of the step, refer to the description of step S103, and details are not described herein again.
  • the default AMF device sends the identifier of the first AMF device to the AN node device.
  • the default AMF device may send the identifier of the first AMF device to the AN node device, so that the AN node The device may forward the first request message sent by the terminal device to the first AMF device based on the identifier of the first AMF device, to perform a process of accessing the first AMF device.
  • the default AMF device may carry the identifier of the first AMF device in the re-routing request message, and send it to the AN node device.
  • the default AMF device completes the process of selecting the first AMF device of the service terminal device for the terminal device based on the third NSSAI acquired from the subscription database.
  • the other device located in the communication system in the communication system can receive the first request message sent by the AN node device, and select the service terminal for the terminal device based on the first request message.
  • the first AMF device of the device may perform the process shown in FIG. 9 instead of the default AMF device, and details are not described herein again.
  • the method in this embodiment is applicable not only to the scenario in which the first request message sent by the terminal device does not carry the first NSSAI including the first information, but also to the first request message carrying the first NSSAI.
  • the first NSSAI includes only information for indicating the SST of the slice that the terminal device allows access, and does not include a scenario for indicating information of the RAT type that the terminal device is allowed to use when accessing the slice that is allowed to access, For example, in the prior art, a scenario in which an AMF device is selected for a terminal device.
  • the method may further perform the embodiments as shown in FIG. 6 and FIG. 7 above, and details are not described herein again.
  • the default AMF device may obtain the third NSSAI from the subscription database, and determine the second NSSAI based on the third NSSAI.
  • the first AMF selected for the terminal device is selected based on the first information included in the second NSSAI. Since the default AMF device selects the first AMF device for the terminal device, not only the SST of the slice that the terminal device is allowed to access but also the RAT type that the terminal device allows to use when accessing the slice that is allowed to access is considered.
  • the selected first AMF device can support the terminal device to access different slices by using multiple types of RATs without causing the RAT type that is allowed to be used when the terminal device access is not allowed to access the slice.
  • the AMF that is accessed when the device is initially accessed may not be able to satisfy the terminal device to use multiple types of RATs to access different slices, and thus the process of reselecting the AMF for the terminal device needs to be performed. Therefore, the method of the present application can reduce the probability of reselecting the AMF for the terminal device in the communication process of the terminal device, thereby reducing the signaling overhead and improving the communication efficiency.
  • FIG. 10 is a schematic flowchart diagram of still another access method provided by the present application.
  • the AN node device is the terminal device based on the first NSSAI.
  • the selected AMF device may not be the first AMF device. It is assumed that the AMF device selected by the AN node device for the terminal device is not the first AMF device.
  • the AMF device is the third AMF device. The embodiment is related to the triggering of the third AMF device as the terminal.
  • the terminal device sends a first request message to the AN node device.
  • the first request message includes: an identifier of the terminal device and a first NSSAI.
  • the first NSSAI does not include information indicating the RAT type that the terminal device is allowed to use when accessing the slice that is allowed to access.
  • the AN node device determines, according to the first request message, a third AMF device that serves the terminal device.
  • the AN node device determines the AMF device to be accessed for the terminal device, it is only based on the SST of the slice that the terminal device allows access, and does not consider the RAT used when the terminal device accesses the slice. Therefore, the third AMF device may not be able to support a scenario in which the terminal device accesses multiple slices using different RATs.
  • the AN node device sends a first request message to the third AMF device.
  • the third AMF device receives the first request message.
  • the third AMF device sends a query request message to the subscription database.
  • the query request message includes: an identifier of the terminal device.
  • the subscription database sends a query response message to the third AMF device.
  • the query response message includes: subscription information of the terminal device.
  • the third AMF device determines the second NSSAI according to the query response message.
  • the third AMF device determines, according to the first information, the SST of the slice to which the third AMF device is connected, and the RAT type supported by the slice to which the third AMF device is connected, whether the third AMF device can provide the service for the terminal device.
  • the SST and the terminal device allow access of the slice that the terminal device allows access according to the first information.
  • the type of the RAT that is allowed to be used for the access, the SST of the slice to which the third AMF device is connected, and the RAT type supported by the slice to which the third AMF device is connected determine whether the third AMF device supports the SST that the terminal device allows access to, And the type of RAT that is allowed to be used when accessing the SST allowed to access.
  • the SST of the slice connected to the third AMF device and the RAT type supported by the slice connected to the third AMF device may be preset on the third AMF device, and may also be accessed by the third AMF device.
  • the network domain management device obtains the etc.
  • the AN node device determines the third AMF device for the terminal device, it is only based on the SST of the slice that the terminal device allows access, and does not consider the RAT used when the terminal device accesses the slice. Therefore, the third AMF device may not be able to support a scenario in which the terminal device accesses multiple slices using different RATs.
  • step S709 is performed.
  • the third AMF device triggers an AMF device reselection operation when determining that the terminal device cannot be served.
  • the third AMF device when the third AMF device determines that the terminal device cannot be served, the third AMF device triggers an AMF device reselection operation to determine, for the terminal device, an AMF that can support the terminal device to access different slices using multiple types of RATs.
  • the device, the first AMF device reduces the chance of reselecting the AMF for the terminal device during the communication of the terminal device.
  • the third AMF device may determine the first information according to the NSSAI information that is obtained by the terminal device acquired from the subscription database, and perform a process of reselecting the AMF device for the terminal device.
  • the third AMF device may acquire the second information, to select the first AMF device of the serving terminal device for the terminal device according to the first information and the second information, and send the first AMF to the AN node device by using, for example, a reject message.
  • the identification of the device such that the AN node device can access the terminal device to the first AMF device.
  • the implementation manner of the first AMF device of the service terminal device is selected by the third AMF according to the first information and the second information, and the descriptions of the foregoing steps S606 to S608 can be referred to.
  • the third AMF device may further send a third request message to the second AMF device (eg, the default AMF device, etc.) to trigger the second AMF device to reselect the AMF device for the terminal device.
  • the second AMF device may perform the steps as shown in steps S603-S607 to obtain the first information and the second information, and select, according to the first information and the second information, the terminal device.
  • the first AMF device of the service terminal device sends the identifier of the first AMF device to the third AMF device.
  • the third AMF device can transmit the identity of the first AMF device to the AN node device by, for example, a reject message, so that the AN node device can access the terminal device to the first AMF device.
  • the third request message may be, for example, a re-routing request message, and the second AMF device may send the message to the third AMF device by using a re-routing accept message when transmitting the identifier of the first AMF device to the third AMF device.
  • the third AMF device may further send a reject message to the AN node device to trigger the AN node device to reselect the AMF device for the terminal device.
  • the AN node device may reselect the AMF device for the terminal device in the manner as shown in steps S502 to S508 or steps S602-S608, and details are not described herein again.
  • the method in this embodiment is applicable not only to the information that the first NSSAI only includes the SST for indicating the slice that the terminal device allows access, but also includes the slice for indicating that the terminal device accesses the allowed access.
  • the scenario of the RAT type information that is allowed to be used is also applicable to the scenario in which the first NSSAI includes the erroneous first information, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the access method provided by the present application when the AN node device accesses the terminal device to the wrong AMF device, the erroneous AMF device can trigger the AMF device reselection operation to ensure that the terminal device can access the supporting terminal device.
  • the use of multiple types of RATs to access different slices of the first AMF device reduces the probability of reselecting AMF for the terminal device during the terminal device communication process, thereby reducing signaling overhead and improving communication efficiency.
  • FIG. 11 is a schematic structural diagram of a network device according to the present application.
  • the network device may include: a first obtaining module 11 , a second acquiring module 12 , and a selecting module 13 . among them,
  • the first obtaining module 11 is configured to acquire first information, where the first information is used to indicate a slice/service type SST of a slice that the terminal device allows access, and a wireless access technology that is allowed to be used when accessing a slice that is allowed to access RAT type;
  • a second obtaining module 12 configured to acquire second information, where the second information is used to indicate an SST of a slice to which the access and mobility management function AMF device is connected, and a RAT type supported by the slice connected to the AMF device;
  • the selecting module 13 is configured to select the first AMF device of the service terminal device according to the first information and the second information.
  • the first acquiring module 11 is specifically configured to acquire the first network slice selection auxiliary information from the terminal device, where the first network slice selection auxiliary information includes the first information.
  • the first obtaining module 11 is configured to receive the first request message from the terminal device, where the first request message carries the first network slice selection auxiliary information, and the first network slice selection auxiliary information is the configured network slice selection auxiliary information. Or accept the network slice to select the auxiliary information.
  • the first acquiring module 11 is configured to acquire the second network slice selection auxiliary information from the second AMF device, where the second network slice selection auxiliary information includes the first information.
  • the second network slice selection assistance information may select auxiliary information for the accepted network slice.
  • the first obtaining module 11 is configured to obtain the subscription information of the terminal device from the subscription database, and determine the first information according to the subscription information of the terminal device.
  • the subscription information may include an SST of the slice subscribed by the terminal device, and a RAT type that is allowed to be used when accessing the sliced subscription; or, the subscription information includes an SST of the slice that the terminal device allows access, and access The type of RAT allowed when accessing the slice is allowed.
  • the second obtaining module is configured to obtain the second information from the AMF device, or obtain the second information from the access network domain management device.
  • the selecting module is specifically configured to match the first information and the second information, select an SST that supports the terminal device to allow access, and select a RAT type AMF device that is allowed to be used when accessing the allowed SST.
  • An AMF device is specifically configured to match the first information and the second information, select an SST that supports the terminal device to allow access, and select a RAT type AMF device that is allowed to be used when accessing the allowed SST.
  • An AMF device is specifically configured to match the first information and the second information, select an SST that supports the terminal device to allow access, and select a RAT type AMF device that is allowed to be used when accessing the allowed SST.
  • An AMF device is specifically configured to match the first information and the second information, select an SST that supports the terminal device to allow access, and select a RAT type AMF device that is allowed to be used when accessing the allowed SST.
  • the network device provided by the present application can perform the action of the AN node device side in the method embodiment shown in FIG. 4, FIG. 5 and FIG. 8 when the network device is an AN node device, and the implementation principle and the technical effect are similar. This will not be repeated here.
  • the network device is the second AMF device
  • the action of the default AMF device side in the method embodiment shown in FIG. 9 may be performed, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 12 is a schematic structural diagram of an AMF device provided by the present application.
  • the AMF device may include: a first receiving module 21, an obtaining module 22, a determining module 23, and a sending module 24. among them,
  • the first receiving module 21 is configured to receive, by the access network node device, a first request message sent by the terminal device, where the first request message carries an identifier of the terminal device;
  • the obtaining module 22 is configured to obtain, according to the identification information of the terminal device, the subscription information corresponding to the identifier of the terminal device from the subscription database; for example, the subscription information includes the SST of the slice signed by the terminal device, and when the access subscription is sliced The type of RAT that is allowed to be used; or, the subscription information includes the SST of the slice that the terminal device allows access to, and the type of RAT that is allowed to be used when accessing the slice that is allowed to access.
  • a determining module 23 configured to determine, according to the subscription information, a slice/service type SST of a slice that the terminal device is allowed to access, and a radio access technology RAT type that is allowed to be used when accessing the slice that is allowed to access;
  • the sending module 24 is configured to send a first accept message to the terminal device, where the first accept message includes: an SST of the slice that the terminal device allows access, and a RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the foregoing AMF device may further include:
  • the second receiving module 25 is configured to: after the sending module 24 sends the accept message to the terminal device, receive the second request message sent by the terminal device from the access network node device, where the second request message is used to indicate that the terminal device is to access the slice. SST, and the type of RAT used when accessing the slice to be accessed;
  • the selecting module 26 is configured to select a slice serving the terminal device according to the second request message, the SST of the slice to which the AMF device is connected, and the RAT type supported by the slice to which the AMF device is connected.
  • FIG. 13 is a schematic structural diagram of a terminal device provided by the present application. As shown in FIG. 13, the terminal device may include: a sending module 31 and a receiving module 32. among them,
  • the sending module 31 is configured to send, by using an access network node device, a first request message to the access and mobility management function AMF device, where the first request message carries the identifier information of the terminal device;
  • the receiving module 32 is configured to receive, by using an access network node device, a first accept message sent by the AMF device, where the first connection is received.
  • the received message includes a slice/service type SST of the slice that the terminal device allows access, and a radio access technology RAT type that is allowed to be used when accessing the slice that is allowed to access.
  • the foregoing first request message further includes: first network slice selection assistance information;
  • the first network slice selection assistance information selects auxiliary information for the configured network slice or the accepted network slice selection assistance information.
  • the terminal device provided in the present application can perform the operations on the terminal device side shown in FIG. 5 to FIG. 10, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 14 is a schematic structural diagram of another AMF device provided by the present application.
  • the AMF device may include: a receiving module 41, an obtaining module 42, a first determining module 43, a second determining module 44, and a triggering module 45. among them,
  • the receiving module 41 is configured to receive, by the access network node device, a first request message sent by the terminal device, where the first request message carries the identifier information of the terminal device;
  • the obtaining module 42 is configured to obtain, according to the identification information of the terminal device, the subscription information of the terminal device from the subscription database;
  • the first determining module 43 is configured to determine, according to the subscription information of the terminal device, the first information, where the first information is used to indicate a slice/service type SST of the slice that the terminal device allows to access, and when the access is allowed to be sliced Radio access technology RAT type that is allowed to be used; exemplary, the subscription information includes an SST of a slice subscribed by the terminal device, and a RAT type that is allowed to be used when accessing the sliced subscription; or, the subscription information includes the terminal device allowing access The SST of the slice, as well as the type of RAT that is allowed to be used when accessing the slice that is allowed to access.
  • the second determining module 44 is configured to determine, according to the first information, the SST of the slice to which the AMF device is connected, and the RAT type supported by the slice connected to the AMF device, whether the AMF device can provide a service for the terminal device;
  • the triggering module 45 is configured to trigger an AMF device reselection operation when the AMF device cannot provide services for the terminal device.
  • the triggering module 45 is configured to: re-select the AMF device for the terminal device according to the first information; or send a third request message to the second AMF device, where the third request message is used to indicate that the second AMF device is the terminal device Selecting the AMF device; or sending a reject message to the access network node device, the reject message is used to indicate that the access network node device reselects the AMF device for the terminal device.
  • the AMF device provided in the present application can perform the action on the third AMF device side shown in FIG. 10, and the implementation principle and technical effects are similar, and details are not described herein again.
  • each module on a device may be integrated into one physical entity in whole or in part, or may be physically separated. And all the modules on one device can be implemented by software in the form of processing component calls; or all of them can be implemented in hardware form; some modules can be realized by processing component calling software, and some modules are realized by hardware.
  • the determining module may be a separately set processing element, or may be integrated in one of the above-mentioned devices, or may be stored in the memory of one of the devices in the form of program code, by one of the devices.
  • the processing component invokes and performs the functions of the above determining module.
  • the implementation of other modules is similar.
  • all or part of these modules on one device can be integrated or implemented independently.
  • the processing elements described herein can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the foregoing method or each of the above modules on a device may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.
  • the above modules may be one or more integrated circuits configured to implement the above method, for example: One or more application specific integrated circuits (ASICs), or one or more digital singnal processors (DSPs), or one or more Field Programmable Gate Arrays (Field Programmable Gate Arrays) FPGA) and so on.
  • ASICs application specific integrated circuits
  • DSPs digital singnal processors
  • FPGA Field Programmable Gate Arrays
  • the processing component may be a general purpose processor, such as a central processing unit (CPU) or other processor that can call the program code.
  • CPU central processing unit
  • these modules on a device can be integrated and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • FIG. 15 is a schematic structural diagram of another network device provided by the present application.
  • the terminal device may include a processor 51 (for example, a CPU), a memory 52, a receiver 53, and a transmitter 54.
  • the receiver 53 and the transmitter 54 are both coupled to the processor 51, and the processor 51 controls reception.
  • the receiving operation of the processor 53, the processor 51 controls the transmitting operation of the transmitter 54;
  • the memory 52 may include a high speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored in the memory 52. , for performing various processing functions and implementing the method steps of the present application.
  • the terminal device involved in the present application may further include: a power source 55, a communication bus 56, and a communication port 57.
  • the receiver 53 and the transmitter 54 may be integrated in the transceiver of the terminal device or may be an independent transceiver antenna on the terminal device.
  • Communication bus 56 is used to implement a communication connection between the components.
  • the communication port 57 is used to implement connection communication between the terminal device and other peripheral devices.
  • the network device when the network device is an AN node device, the above-mentioned memory 52 is used to store computer executable program code, and the program code includes instructions; when the processor 51 executes the instruction, the instruction causes the network device to execute the above-mentioned FIG. 4 and FIG.
  • the operation principle and technical effect of the operation on the side of the AN node shown in FIG. 8 are similar, and details are not described herein again.
  • the memory 52 is used to store computer executable program code, and the program code includes instructions; when the processor 51 executes the instruction, the instruction causes the network device to execute the above-mentioned FIG.
  • the action of the default AMF device side is similar to the technical effect and will not be described here.
  • FIG. 16 is a schematic structural diagram of still another AMF device provided by the present application.
  • the terminal device may include a processor 61 (for example, a CPU), a memory 62, a receiver 63, and a transmitter 64.
  • the receiver 63 and the transmitter 64 are both coupled to the processor 61, and the processor 61 controls reception.
  • the receiving operation of the processor 63, the processor 61 controls the transmitting operation of the transmitter 64;
  • the memory 62 may include a high speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored in the memory 62. , for performing various processing functions and implementing the method steps of the present application.
  • the terminal device involved in the present application may further include: a power source 65, a communication bus 66, and a communication port 67.
  • the receiver 63 and the transmitter 64 may be integrated in the transceiver of the terminal device or may be an independent transceiver antenna on the terminal device.
  • Communication bus 66 is used to implement a communication connection between components.
  • the communication port 67 is used to implement connection communication between the terminal device and other peripheral devices.
  • the above-mentioned memory 62 is used to store computer executable program code, and the program code includes instructions; when the processor 61 executes the instruction, the instruction causes the AMF device to execute the first AMF device side shown in FIG. 6 and FIG. 7 above.
  • the action principle and the technical effect are similar, and will not be described here.
  • FIG. 17 is a schematic structural diagram of another terminal device provided by the present application.
  • the terminal device may include a processor 71 (for example, a CPU), a memory 72, a receiver 73, and a transmitter 74.
  • the receiver 73 and the transmitter 74 are both coupled to the processor 71, and the processor 71 controls reception.
  • the receiving operation of the processor 73, the processor 71 controls the transmitting operation of the transmitter 74;
  • the memory 72 may include a high speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored in the memory 72. , for performing various processing functions and implementing the method steps of the present application.
  • the terminal device involved in the present application may further include: a power source 75, a communication bus 76, and a communication end. Mouth 77.
  • the receiver 73 and the transmitter 74 may be integrated in the transceiver of the terminal device or may be an independent transceiver antenna on the terminal device.
  • Communication bus 76 is used to implement a communication connection between the components.
  • the communication port 77 is used to implement connection communication between the terminal device and other peripheral devices.
  • the above-mentioned memory 72 is used to store computer executable program code, and the program code includes instructions.
  • the processor 71 executes the instruction, the instruction causes the terminal device to perform the action on the terminal device side shown in FIG. 5 to FIG. 10 described above.
  • the implementation principle and technical effects are similar, and will not be described here.
  • FIG. 18 is a schematic structural diagram of another terminal device provided by the present application.
  • the terminal device may include a processor 81 (for example, a CPU), a memory 82, a receiver 83, and a transmitter 84.
  • the receiver 83 and the transmitter 84 are both coupled to the processor 81, and the processor 81 controls reception.
  • the receiving operation of the processor 83, the processor 81 controls the transmitting operation of the transmitter 84;
  • the memory 82 may include a high speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored in the memory 82. , for performing various processing functions and implementing the method steps of the present application.
  • the terminal device involved in the present application may further include: a power source 85, a communication bus 86, and a communication port 87.
  • the receiver 83 and the transmitter 84 may be integrated in the transceiver of the terminal device or may be an independent transceiver antenna on the terminal device.
  • Communication bus 86 is used to implement a communication connection between components.
  • the communication port 87 is used to implement connection communication between the terminal device and other peripheral devices.
  • the above-mentioned memory 82 is used to store computer executable program code, and the program code includes instructions; when the processor 81 executes the instruction, the instruction causes the third AMF device to perform the action on the third AMF device side shown in FIG. 10 described above.
  • the implementation principle and technical effect are similar, and will not be described here.
  • FIG. 19 is a structural block diagram of the terminal device provided by the application as a mobile phone.
  • the mobile phone may include: a radio frequency (RF) circuit 1110, a memory 1120, an input unit 1130, a display unit 1140, a sensor 1150, an audio circuit 1160, a wireless fidelity (WiFi) module 1170, and processing.
  • RF radio frequency
  • Device 1180, and power supply 1190 and other components It will be understood by those skilled in the art that the structure of the handset shown in FIG. 19 does not constitute a limitation to the handset, and may include more or less components than those illustrated, or some components may be combined, or different components may be arranged.
  • the RF circuit 1110 can be used for receiving and transmitting signals during the transmission or reception of information or during a call. For example, after receiving the downlink information of the base station, the processing is performed by the processor 1180. In addition, the uplink data is sent to the base station.
  • RF circuits include, but are not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like.
  • LNA Low Noise Amplifier
  • RF circuitry 1110 can also communicate with the network and other devices via wireless communication. The above wireless communication may use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division). Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), e-mail, Short Messaging Service (SMS), and the like.
  • GSM Global System of Mobile communication
  • GPRS General
  • the memory 1120 can be used to store software programs and modules, and the processor 1180 executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory 1120.
  • the memory 1120 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to Use of mobile phones Data created (such as audio data, phone book, etc.).
  • memory 1120 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the input unit 1130 can be configured to receive input numeric or character information and to generate key signal inputs related to user settings and function controls of the handset.
  • the input unit 1130 may include a touch panel 1131 and other input devices 1132.
  • the touch panel 1131 also referred to as a touch screen, can collect touch operations on or near the user (such as the user using a finger, a stylus, or the like on the touch panel 1131 or near the touch panel 1131. Operation), and drive the corresponding connecting device according to a preset program.
  • the touch panel 1131 may include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information.
  • the processor 1180 is provided and can receive commands from the processor 1180 and execute them.
  • the touch panel 1131 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the input unit 1130 may also include other input devices 1132.
  • other input devices 1132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.
  • the display unit 1140 can be used to display information input by the user or information provided to the user as well as various menus of the mobile phone.
  • the display unit 1140 may include a display panel 1141.
  • the display panel 1141 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • the touch panel 1131 can be overlaid on the display panel 1141. When the touch panel 1131 detects a touch operation thereon or nearby, the touch panel 1131 transmits to the processor 1180 to determine the type of the touch event, and then the processor 1180 is The type of touch event provides a corresponding visual output on display panel 1141.
  • touch panel 1131 and the display panel 1141 are used as two independent components to implement the input and input functions of the mobile phone in FIG. 10, in some embodiments, the touch panel 1131 and the display panel 1141 may be integrated. Realize the input and output functions of the phone.
  • the handset may also include at least one type of sensor 1150, such as a light sensor, motion sensor, and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 1141 according to the brightness of the ambient light, and the light sensor may close the display panel 1141 and/or when the mobile phone moves to the ear. Or backlight.
  • the acceleration sensor can detect the acceleration of each direction (usually three axes). When it is still, it can detect the magnitude and direction of gravity. It can be used to identify the gesture of the mobile phone (such as horizontal and vertical screen switching, related games).
  • the mobile phone can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, no longer repeat .
  • Audio circuitry 1160, speaker 1161, and microphone 1162 can provide an audio interface between the user and the handset.
  • the audio circuit 1160 can transmit the converted electrical data of the received audio data to the speaker 1161, and convert it into a sound signal output by the speaker 1161; on the other hand, the microphone 1162 converts the collected sound signal into an electrical signal, and the audio circuit 1160 After receiving, it is converted into audio data, and then processed by the audio data output processor 1180, transmitted to the other mobile phone via the RF circuit 1110, or outputted to the memory 1120 for further processing.
  • WiFi is a short-range wireless transmission technology.
  • the mobile phone can help users to send and receive emails, browse web pages and access streaming media through the WiFi module 1170, which provides users with wireless broadband Internet access.
  • Figure 19 shows The WiFi module 1170 is out, but it can be understood that it does not belong to the necessary configuration of the mobile phone, and can be omitted as needed within the scope of not changing the essence of the present application.
  • the processor 1180 is a control center for the handset, which connects various portions of the entire handset using various interfaces and lines, by executing or executing software programs and/or modules stored in the memory 1120, and invoking data stored in the memory 1120, The phone's various functions and processing data, so that the overall monitoring of the phone.
  • the processor 1180 may include one or more processing units; for example, the processor 1180 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, and the like.
  • the modem processor primarily handles wireless communications. It will be appreciated that the above described modem processor may also not be integrated into the processor 1180.
  • the handset also includes a power supply 1190 (such as a battery) that powers the various components.
  • a power supply 1190 (such as a battery) that powers the various components.
  • the power supply can be logically coupled to the processor 1180 via a power management system to manage charging, discharging, and power management functions through the power management system.
  • the mobile phone can also include a camera 1200, which can be a front camera or a rear camera.
  • the mobile phone may further include a Bluetooth module, a GPS module, and the like, and details are not described herein again.
  • the processor 1180 included in the mobile phone may be used to perform the foregoing access method embodiment, and the implementation principle and technical effects are similar, and details are not described herein again.
  • a computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, computer instructions can be wired from a website site, computer, server or data center (eg Coax, fiber, digital subscriber line (DSL) or wireless (eg, infrared, wireless, microwave, etc.) is transmitted to another website, computer, server, or data center.
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • Useful media can be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)).

Landscapes

  • Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请提供一种接入方法、网络设备、终端设备和AMF设备，该方法包括：网络设备获取第一信息，第一信息用于指示终端设备允许接入的切片的切片/业务类型SST，以及，接入允许接入的切片时允许使用的无线接入技术RAT类型；网络设备获取第二信息，第二信息用于指示接入和移动性管理功能AMF设备所连接的切片的SST，以及，AMF设备所连接的切片支持的RAT类型；网络设备根据第一信息和第二信息，选择服务终端设备的第一AMF设备。本申请提供的接入方法、网络设备、终端设备和AMF设备，可以降低为终端设备重选AMF的几率，进而减少信令开销，提高通信效率。

Description

接入方法、网络设备、终端设备和AMF设备 技术领域
本申请涉及通信技术，尤其涉及一种接入方法、网络设备、终端设备和AMF设备。
背景技术
网络切片是一种新式的网络模式和业务模式。通过网络切片技术，可以在同一套宽带网络硬件基础设施上切分出多个虚拟网络，其中，每个虚拟网络为一个网络切片。各网络切片之间在逻辑上隔离，从而使得运营商可以按照业务场景的需要，对每个网络切片进行网络功能的定制，以实现多种业务在共享一套宽带网络硬件基础设施的同时，又能保持业务的相对独立。这样，终端设备可以根据自己的业务需求，接入不同的网络切片。第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)定义的网络切片是一个端到端的网络，由接入网络、核心网络以及传输网络组成。一个“核心网切片”可以视为一个实例化的核心网络架构，目前业界所考虑的“核心网切片”用例包括移动宽带、多媒体、大规模机器类通信(Massive Machine Type Communication，MMTC)和关键机器类通信(Critical Machine Type Communication，CMTC)等。
目前，终端设备可以通过接入和移动性管理功能(Access and Mobility Management Function，AMF)设备接入该AMF设备所连接的核心网切片。由于不同的AMF设备所连接的核心网切片可能不同，因此，连接终端设备的接入网络(Access Network，AN)节点设备可以根据终端设备的网络切片选择辅助信息(Network Slice Selection Assistance Information，NSSAI)，为终端设备选择接入的AMF设备。其中，该NSSAI可以包括：终端设备支持的切片/业务类型(Slice/Service Type，SST)信息。通过这种方式，可以使终端设备在传输不同的业务时，通过AN节点设备所选择的AMF设备接入该业务所对应的核心网切片，以通过该核心网切片传输该业务。
然而，基于上述方法，AN节点设备所选择的AMF设备可能无法满足终端设备实际使用时的需求，出现在终端设备通信过程中重选AMF设备的情况，使得信令开销较大、通信效率较低。
发明内容
本申请提供一种接入方法、网络设备、终端设备和AMF设备，用于解决现有技术中因AN节点设备所选择的AMF设备无法满足终端设备实际使用时的需求，需要在终端设备通信过程中重选AMF设备，使得信令开销较大、通信效率较低的技术问题。
第一方面，本申请提供一种接入方法，所述方法包括：
网络设备获取第一信息，所述第一信息用于指示终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
所述网络设备获取第二信息，所述第二信息用于指示接入和移动性管理功能AMF设备所连接的切片的SST，以及，所述AMF设备所连接的切片支持的RAT类型；
所述网络设备根据所述第一信息和所述第二信息，选择服务所述终端设备的第一AMF设备。
通过第一方面提供的接入方法，网络设备在为终端设备选择AMF时，不仅要考虑终端设备允许接入的切片的SST，还要考虑终端设备接入允许接入的切片时允许使用的RAT类型，从而使得网络设备为终端设备所选择的第一AMF可以支持终端设备使用多个类型的RAT接入不同的切片，而不会出现因未考虑终端设备接入允许接入的切片时允许使用的RAT类型，导致终端设备初始接入时所接入的AMF可能无法满足终端设备使用多个类型的RAT接入不同的切片，进而需要在终端设备通信过程中执行为终端设备重选AMF的流程。因此，本申请的方法，可以降低为终端设备重选AMF的几率，进而减少信令开销，提高通信效率。
在一种可能的设计中，所述网络设备为接入网络节点设备，所述网络设备获取第一信息，包括：
所述网络设备从所述终端设备获取第一网络切片选择辅助信息，所述第一网络切片选择辅助信息包括所述第一信息；或
所述网络设备从第二AMF设备获取第二网络切片选择辅助信息，所述第二网络切片选择辅助信息包括所述第一信息。
通过该可能的设计提供的接入方法，使得网络设备获取第一信息的方式灵活多样，从而使得网络设备可以基于终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，为终端设备选择AMF，可以降低为终端设备重选AMF的几率，进而减少信令开销，提高通信效率。
在一种可能的设计中，所述网络设备从所述终端设备获取所述第一网络切片选择辅助信息，包括：
所述网络设备从所述终端设备接收第一请求消息，其中，所述第一请求消息携带所述第一网络切片选择辅助信息，所述第一网络切片选择辅助信息为配置的网络切片选择辅助信息或接受的网络切片选择辅助信息。
通过该可能的设计提供的接入方法，网络设备在接收到终端设备的第一请求消息后，可以根据第一请求消息中携带的第一NSSAI所包括的第一信息，为终端设备选择接入的第一AMF，可以降低为终端设备重选AMF的几率，进而减少信令开销，提高了通信效率。
在一种可能的设计中，所述第二网络切片选择辅助信息为接受的网络切片选择辅助信息。
在一种可能的设计中，所述网络设备获取第二信息，包括：
所述网络设备从所述AMF设备获取所述第二信息；或
所述网络设备从接入网络域管理设备获取所述第二信息。
通过该可能的设计提供的接入方法，使得网络设备获取第二信息的方式灵活多样，从而使得网络设备可以基于终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，以及，AMF设备所连接的切片的SST，以及，所述AMF设备所连接的切片支持的RAT类型，为终端设备选择AMF，可以降低为终端设备重选AMF的几率，进而减少信令开销，提高通信效率。
在一种可能的设计中，所述网络设备为第二AMF设备，所述网络设备获取第一信息， 包括：
所述网络设备从签约数据库获取所述终端设备的签约信息；
所述网络设备根据所述终端设备的签约信息，确定所述第一信息。
在一种可能的设计中，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
在一种可能的设计中，所述网络设备根据所述第一信息和所述第二信息，选择服务所述终端设备的第一AMF设备，包括：
所述网络设备匹配所述第一信息和所述第二信息，选择支持所述终端设备允许接入的SST，以及，接入所允许接入的SST时允许使用的RAT类型的AMF设备作为所述第一AMF设备。
第二方面，本申请提供一种接入方法，所述方法包括：
接入和移动性管理功能AMF设备从接入网络节点设备接收终端设备发送的第一请求消息，所述第一请求消息携带所述终端设备的标识；
所述AMF设备根据所述终端设备的标识信息，从签约数据库获取所述终端设备的标识对应的签约信息；
所述AMF设备根据所述签约信息，确定所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
所述AMF设备向所述终端设备发送第一接受消息，所述第一接受消息包括：所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
通过第二方面提供的接入方法，AMF设备在接收到终端设备的第一请求消息之后，可以在基于从签约数据库中获取到的签约信息对终端设备进行认证的过程中，根据签约信息，确定终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，从而可以将这些信息携带在第一接受消息中发送给终端设备，以使得终端设备可以基于终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，向AMF设备请求接入的切片，可以提高接入切片的效率，以及，接入切片的准确性。
在一种可能的设计中，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
在一种可能的设计中，所述AMF设备向所述终端设备发送接受消息之后，所述方法还包括：
所述AMF设备从接入网络节点设备接收所述终端设备发送的第二请求消息，所述第二请求消息用于指示所述终端设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型；
所述AMF设备根据所述第二请求消息、所述AMF设备所连接的切片的SST、所述AMF设备所连接的切片支持的RAT类型，为所述终端设备选择提供服务的切片。
通过该可能的设计提供的接入方法，AMF设备在接收到终端设备发送的用于指示终端 设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型的第二请求消息后，可以基于待接入切片的SST和接入该切片所使用的RAT类型，为终端设备选择正确的切片，提高了切片接入的准确性。
第三方面，本申请提供一种接入方法，所述方法包括：
终端设备通过接入网络节点设备向接入和移动性管理功能AMF设备发送第一请求消息，所述第一请求消息携带所述终端设备的标识信息；
所述终端设备通过所述接入网络节点设备接收所述AMF设备发送的第一接受消息，所述第一接受消息包括：所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型。
通过第三方面提供的接入方法，终端设备在向AMF设备发送第一请求消息之后，可以接收到携带有终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型的第一接受消息，以使得终端设备可以基于终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，向AMF设备请求接入的切片，可以提高接入切片的效率，以及，接入切片的准确性。
在一种可能的设计中，所述第一请求消息，还包括：第一网络切片选择辅助信息；
所述第一网络切片选择辅助信息为配置的网络切片选择辅助信息或接受的网络切片选择辅助信息。
第四方面，本申请提供一种接入方法，所述方法包括：
接入和移动性管理功能AMF设备从接入网络节点设备接收终端设备发送的第一请求消息，所述第一请求消息携带终端设备的标识信息；
所述AMF设备根据所述终端设备的标识信息，从签约数据库获取所述终端设备的签约信息；
所述AMF设备根据所述终端设备的签约信息，确定所述第一信息，所述第一信息用于指示所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
所述AMF设备根据所述第一信息、所述AMF设备所连接的切片的SST、所述AMF设备所连接的切片支持的RAT类型，确定所述AMF设备是否能够为所述终端设备提供服务；
若所述AMF设备无法为所述终端设备提供服务，所述AMF设备触发AMF设备重选操作。
通过第四方面提供的接入方法，AMF设备在接收到终端设备的第一请求消息之后，可以先获取终端设备的签约信息，以通过签约信息获取终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型，进而在基于这些信息，确定无法为终端设备提供服务时，AMF设备可以触发为终端设备重选AMF设备的操作，以确保将终端设备能够接入到支持终端设备使用多个类型的RAT接入不同的切片的第一AMF设备上，降低在终端设备通信过程中为终端设备重选AMF的几率，进而减少信令开销，提高了通信效率。
在一种可能的设计中，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接 入的切片时允许使用的RAT类型。
在一种可能的设计中，所述AMF设备触发AMF设备重选操作，包括：
所述AMF设备根据所述第一信息为终端设备重选AMF设备；或者
所述AMF设备向第二AMF设备发送第三请求消息，所述第三请求消息用于指示所述第二AMF设备为所述终端设备重选AMF设备；或者，
所述AMF设备向所述接入网络节点设备发送拒绝消息，所述拒绝消息用于指示所述接入网络节点设备为所述终端设备重选AMF设备。
通过该可能的设计提供的接入方法，使得为终端设备重选AMF设备的操作的方式灵活多样，可以确保将终端设备能够接入到支持终端设备使用多个类型的RAT接入不同的切片的第一AMF设备上，降低在终端设备通信过程中为终端设备重选AMF的几率，进而减少信令开销，提高了通信效率。
第五方面，本申请提供一种网络设备，所述网络设备包括：
第一获取模块，用于获取第一信息，所述第一信息用于指示终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
第二获取模块，用于获取第二信息，所述第二信息用于指示接入和移动性管理功能AMF设备所连接的切片的SST，以及，所述AMF设备所连接的切片支持的RAT类型；
选择模块，用于根据所述第一信息和所述第二信息，选择服务所述终端设备的第一AMF设备。
在一种可能的设计中，所述网络设备为接入网络节点设备；
所述第一获取模块，具体用于从所述终端设备获取第一网络切片选择辅助信息，所述第一网络切片选择辅助信息包括所述第一信息；或，从第二AMF设备获取第二网络切片选择辅助信息，所述第二网络切片选择辅助信息包括所述第一信息。
在一种可能的设计中，所述第一获取模块，具体用于从所述终端设备接收第一请求消息，其中，所述第一请求消息携带所述第一网络切片选择辅助信息，所述第一网络切片选择辅助信息为配置的网络切片选择辅助信息或接受的网络切片选择辅助信息。
在一种可能的设计中，所述第二网络切片选择辅助信息为接受的网络切片选择辅助信息。
在一种可能的设计中，所述第二获取模块，具体用于从所述AMF设备获取所述第二信息；或从接入网络域管理设备获取所述第二信息。
在一种可能的设计中，所述网络设备为第二AMF设备；
所述第一获取模块，具体用于从签约数据库获取所述终端设备的签约信息，并根据所述终端设备的签约信息，确定所述第一信息。
在一种可能的设计中，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
在一种可能的设计中，所述选择模块，具体用于匹配所述第一信息和所述第二信息，选择支持所述终端设备允许接入的SST，以及，接入所允许接入的SST时允许使用的RAT 类型的AMF设备作为所述第一AMF设备。
上述第五方面和第五方面的各可能的设计所提供的网络设备，其有益效果可以参见上述第一方面和第一方面的各可能的设计所带来的有益效果，在此不再赘述。
第六方面，本申请提供一种接入和移动性管理功能AMF设备，所述AMF设备包括：
第一接收模块，用于从接入网络节点设备接收终端设备发送的第一请求消息，所述第一请求消息携带所述终端设备的标识；
获取模块，用于根据所述终端设备的标识信息，从签约数据库获取所述终端设备的标识对应的签约信息；
确定模块，用于根据所述签约信息，确定所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
发送模块，用于向所述终端设备发送第一接受消息，所述第一接受消息包括：所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
在一种可能的设计中，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
在一种可能的设计中，所述AMF设备还包括：
第二接收模块，用于在所述发送模块向所述终端设备发送接受消息之后，从接入网络节点设备接收所述终端设备发送的第二请求消息，所述第二请求消息用于指示所述终端设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型；
选择模块，用于根据所述第二请求消息、所述AMF设备所连接的切片的SST、所述AMF设备所连接的切片支持的RAT类型，为所述终端设备选择提供服务的切片。
上述第六方面和第六方面的各可能的设计所提供的AMF设备，其有益效果可以参见上述第二方面和第二方面的各可能的设计所带来的有益效果，在此不再赘述。
第七方面，本申请提供一种终端设备，所述终端设备包括：
发送模块，用于通过接入网络节点设备向接入和移动性管理功能AMF设备发送第一请求消息，所述第一请求消息携带所述终端设备的标识信息；
接收模块，用于通过所述接入网络节点设备接收所述AMF设备发送的第一接受消息，所述第一接受消息包括：所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型。
在一种可能的设计中，所述第一请求消息，还包括：第一网络切片选择辅助信息；
所述第一网络切片选择辅助信息为配置的网络切片选择辅助信息或接受的网络切片选择辅助信息。
上述第七方面和第七方面的各可能的设计所提供的AMF设备，其有益效果可以参见上述第三方面和第三方面的各可能的设计所带来的有益效果，在此不再赘述。
第八方面，本申请提供一种接入和移动性管理功能AMF设备，所述AMF设备包括：
接收模块，用于从接入网络节点设备接收终端设备发送的第一请求消息，所述第一请求消息携带终端设备的标识信息；
获取模块，用于根据所述终端设备的标识信息，从签约数据库获取所述终端设备的签 约信息；
第一确定模块，用于根据所述终端设备的签约信息，确定所述第一信息，所述第一信息用于指示所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
第二确定模块，用于根据所述第一信息、所述AMF设备所连接的切片的SST、所述AMF设备所连接的切片支持的RAT类型，确定所述AMF设备是否能够为所述终端设备提供服务；
触发模块，用于在所述AMF设备无法为所述终端设备提供服务时，触发AMF设备重选操作。
在一种可能的设计中，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
在一种可能的设计中，所述触发模块，具体用于根据所述第一信息为终端设备重选AMF设备；或者向第二AMF设备发送第三请求消息，所述第三请求消息用于指示所述第二AMF设备为所述终端设备重选AMF设备；或者，向所述接入网络节点设备发送拒绝消息，所述拒绝消息用于指示所述接入网络节点设备为所述终端设备重选AMF设备。
上述第八方面和第八方面的各可能的设计所提供的AMF设备，其有益效果可以参见上述第四方面和第四方面的各可能的设计所带来的有益效果，在此不再赘述。
第九方面，本申请提供一种网络设备，包括：处理器、存储器、接收器、发送器；所述接收器和所述发送器均耦合至所述处理器，所述处理器控制所述接收器的接收动作，所述处理器控制所述发送器的发送动作；
其中，存储器用于存储计算机可执行程序代码，程序代码包括指令；当处理器执行指令时，指令使网络设备执行如第一方面和第一方面的各可能的实施方式任一项的接入方法。
上述第九方面所提供的网络设备，其有益效果可以参见上述第一方面和第一方面的各可能的实施方式所带来的有益效果，在此不再赘述。
第十方面，本申请提供一种接入和移动性管理功能AMF设备，包括：处理器、存储器、接收器和发送器；所述接收器和所述发送器耦合至所述处理器，所述处理器控制所述接收器的接收动作，控制所述发送器的发送动作；
其中，存储器用于存储计算机可执行程序代码，程序代码包括指令；当处理器执行指令时，指令使AMF设备执行如第二方面和第二方面的各可能的实施方式任一项的接入方法。
上述第十方面所提供的AMF设备，其有益效果可以参见上述第二方面和第二方面的各可能的实施方式所带来的有益效果，在此不再赘述。
第十一方面，本申请提供一种终端设备，包括：处理器、存储器、接收器和发送器；所述接收器和所述发送器耦合至所述处理器，所述处理器控制所述接收器的接收动作，控制所述发送器的发送动作；
其中，存储器用于存储计算机可执行程序代码，程序代码包括指令；当处理器执行指令时，指令使终端设备执行如第三方面和第三方面的各可能的实施方式任一项的接入方法。
上述第十一方面所提供的终端设备，其有益效果可以参见上述第三方面和第三方面的 各可能的实施方式所带来的有益效果，在此不再赘述。
第十二方面，本申请提供一种接入和移动性管理功能AMF设备，包括：处理器、存储器、接收器和发送器；所述接收器和所述发送器耦合至所述处理器，所述处理器控制所述接收器的接收动作，控制所述发送器的发送动作；
其中，存储器用于存储计算机可执行程序代码，程序代码包括指令；当处理器执行指令时，指令使AMF设备执行如第四方面和第四方面的各可能的实施方式任一项的接入方法。
上述第十二方面所提供的AMF设备，其有益效果可以参见上述第四方面和第四方面的各可能的实施方式所带来的有益效果，在此不再赘述。
本申请第十三方面提供一种网络设备，包括用于执行以上第一方面的方法的至少一个处理元件(或芯片)。
本申请第十四方面提供一种接入和移动性管理功能AMF设备，包括用于执行以上第二方面的方法的至少一个处理元件(或芯片)。
本申请第十五方面提供一种终端设备，包括用于执行以上第三方面的方法的至少一个处理元件(或芯片)。
本申请第十六方面提供一种接入和移动性管理功能AMF设备，包括用于执行以上第四方面的方法的至少一个处理元件(或芯片)。
本申请第十七方面提供一种程序，该程序在被处理器执行时用于执行以上第一方面的方法。
本申请第十八方面提供一种程序，该程序在被处理器执行时用于执行以上第二方面的方法。
本申请第十九方面提供一种程序，该程序在被处理器执行时用于执行以上第三方面的方法。
本申请第二十方面提供一种程序，该程序在被处理器执行时用于执行以上第四方面的方法。
本申请第二十一方面提供一种程序产品，例如计算机可读存储介质，包括第十七方面的程序。
本申请第二十二方面提供一种程序产品，例如计算机可读存储介质，包括第十八方面的程序。
本申请第二十三方面提供一种程序产品，例如计算机可读存储介质，包括第十九方面的程序。
本申请第二十四方面提供一种程序产品，例如计算机可读存储介质，包括第二十方面的程序。
本申请第二十五方面提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面的方法。
本申请第二十六方面提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第二方面的方法。
本申请第二十七方面提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第三方面的方法。
本申请第二十八方面提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第四方面的方法。
本申请提供的接入方法、网络设备、终端设备和AMF设备，在为终端设备选择AMF时，不仅要考虑终端设备允许接入的切片的SST，还要考虑终端设备接入允许接入的切片时允许使用的RAT类型，从而为终端设备所选择的第一AMF可以支持终端设备使用多个类型的RAT接入不同的切片，而不会出现因未考虑终端设备接入允许接入的切片时允许使用的RAT类型，导致终端设备初始接入时所接入的AMF可能无法满足终端设备使用多个类型的RAT接入不同的切片，进而需要在终端设备通信过程中执行为终端设备重选AMF的流程。因此，本申请提供的接入方法、网络设备、终端设备和AMF，可以降低为终端设备重选AMF的几率，进而减少信令开销，提高了通信效率。
附图说明
图1为一种核心网切片的示意图；
图2为一种终端设备接入核心网切片的场景示意图；
图3为本申请提供的一种通信系统示意图；
图4为本申请提供的一种接入方法的流程示意图；
图5为本申请提供的另一种接入方法的流程示意图；
图6为本申请提供的又一种接入方法的流程示意图；
图7为本申请提供的又一种接入方法的流程示意图；
图8为本申请提供的又一种接入方法的流程示意图；
图9为本申请提供的又一种接入方法的流程示意图；
图10为本申请提供的又一种接入方法的流程示意图；
图11为本申请提供的一种网络设备的结构示意图；
图12为本申请提供的一种AMF设备的结构示意图；
图13为本申请提供的一种终端设备的结构示意图；
图14为本申请提供的另一种AMF设备的结构示意图；
图15为本申请提供的另一种网络设备的结构示意图；
图16为本申请提供的又一种AMF设备的结构示意图；
图17为本申请提供的另一种终端设备的结构示意图；
图18为本申请提供的另一种终端设备的结构示意图；
图19为申请提供的终端设备为手机时的结构框图。
具体实施方式
本申请中，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
以下，对本申请中的部分用语进行解释说明，以便于本领域技术人员理解：
AN节点设备：可以是基站，还可以是接入点(Access Point，AP)。基站又称为无线 接入网(Radio Access Network，RAN)设备，是一种将终端接入到无线网络的设备，可以是全球移动通讯(Global System of Mobile communication，GSM)或码分多址(Code Division Multiple Access，CDMA)中的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)中的基站(NodeB，NB)，还可以是长期演进(Long Term Evolution，LTE)中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者未来5G网络中的基站等，在此并不限定。
终端设备：可以是无线终端也可以是有线终端，无线终端可以是指向用户提供语音和/或其他业务数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，个人通信业务(Personal Communication Service，PCS)电话、无绳电话、会话发起协议(Session Initiation Protocol，SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)等设备。无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、用户设备(User Device or User Equipment)，在此不作限定。上述终端设备还可以车与车(Vehicle-to-vehicle，V2V)通信中的汽车、机器类通信中的机器等。
图1为一种核心网切片的示意图。如图1所示，通过网络切片技术，可以在位于核心网的同一套宽带网络硬件基础设施上切分出多个虚拟网络。每个虚拟网络视为一个核心网切片(简称切片)，每个切片支持使用一种或多种无线接入技术(Radio Access Technology，RAT)传输一种业务的数据。这样，终端设备可以根据自己的业务需求，选择合适的切片接入，以进行业务的传输。
其中，上述所说的切片例如可以为关键机器类通信切片(Critical Machine Type Communication Slice，Critical MTC Slice)、大规模机器类通信切片(Massive Machine Type Communication Slice，Massive MTC Slice)、移动宽带切片(Mobile Broadband Slice，MBB Slice)、超可靠低延迟通信切片(Ultra-reliable and low latency communications Slice，URLLC Slice)、多媒体广播多播业务切片(Multimedia Broadcast Multicast Service Slice，MBMS Slice)。图1示出的是以在同一宽带网络硬件基础设施上切分出1个Critical MTC Slice、2个Massive MTC Slice、1个MBB Slice为例的示意图。
上述所说的RAT例如可以为无线局域网络(Wireless Local Area Networks，WLAN)、通用移动通信系统(Universal Mobile Telecommunications System，UMTS)的陆地无线接入网(UMTS Terrestrial Radio Access Network,UTRAN)、全球移动通信系统(Global System for Mobile Communication，GSM)/增强型数据速率GSM演进技术(Enhanced Data Rate for GSM Evolution，EDGE)无线接入网(GSM EDGE Radio Access Network，GERAN)、增强型通用陆地无线接入网(Evolved Universal Terrestrial Radio Access Network，EUTRAN) 等。当RAT为3GPP接入技术(例如上述所说的UMTS、UTRAN、GSM等)时，该RAT对应的AN节点设备可以为无线接入网络(Radio Access Network，RAN)。即，终端设备需要使用3GPP接入技术传输某一业务时，终端可以通过RAN接入支持3GPP接入技术的切片。当RAT为WLAN时，该RAT对应的AN节点设备可以为接入点(Access Point，AP)。即，终端设备需要使用WLAN传输某一业务时，终端可以通过AP接入支持WLAN的切片。图1中示出的是以RAN和AP为例的核心网切片示意图。
网络中有多个接入和移动性管理功能(Access and Mobility Management Function，AMF)设备。其中，每个AMF设备可以与多个切片连接，各AMF所连接的切片可能不同。AMF设备用于将接入AMF设备的终端设备连接到终端设备所需接入的切片上。目前，提出了终端设备可以同时接入多个切片的场景，该多个切片之间可以共享一个或多个核心网设备，例如：AMF设备。在该架构下，终端设备在初始接入AN节点设备时，AN节点设备可以根据终端设备的网络切片选择辅助信息(Network Slice Selection Assistance Information，NSSAI)，为终端设备选择接入的AMF设备。其中，上述NSSAI可以包括：终端设备允许接入的一个或多个切片的切片/业务类型(Slice/Service Type，SST)，以及，用于区分具备相同SST的切片的补充信息，例如：租户身份标识号(Tenant Identification，Tenant ID)、终端设备所属的群组标识等。然而，由于AN节点设备在通过上述方式为终端设备确定待接入的AMF设备时，仅是基于终端设备支持的SST，并没有考虑终端设备接入切片时所使用的RAT。因此，可能存在如下情况：
图2为一种终端设备接入核心网切片的场景示意图。如图2所示，假定终端设备支持语音业务和上网业务，终端设备支持3GPP和WLAN无线接入技术，其中，语音业务所对应的切片为网络电话切片(Voice over Internet Protocol Slice，VoIP Slice)，上网业务对应的切片为增强移动宽带切片(enhance Mobile Broadband Slice，eMBB Slice)。也就是说，终端设备允许接入的切片包括：VoIP Slice和eMBB Slice。此时，终端设备的NSSAI所包括的SST为VoIP和eMBB。
以终端设备初始使用3GPP进行语音业务为例，终端设备在使用3GPP接入技术接入RAN后，由于RAN并没有考虑终端设备接入其他切片时可能所使用的RAT。因此，RAN基于终端设备的NSSAI，为终端设备选择并连接到支持3GPP接入技术的VoIP Slice和支持3GPP的eMBB Slice的AMF设备，而此AMF设备并没有连接支持其他无线接入技术的eMBB Slice。在本示例中，假定当前选择的AMF设备为AMF-1设备。此时，终端设备通过AMF-1设备连接的VoIP Slice进行语音业务。
假定AMF-1设备没有连接支持WLAN的eMBB Slice，若终端设备在进行语音业务的同时，需要使用WLAN进行上网业务，则终端设备使用WLAN接入AP后，由于AMF-1设备未连接有支持WLAN的eMBB Slice，所以AMF-1设备无法将终端设备连接到合适的eMBB Slice。在这种情况下，为了使终端设备可以通过同一AMF设备接入自己所支持的多个切片，需要为终端设备重选一个能够同时连接支持3GPP接入技术的VoIP Slice、支持WLAN的eMBB Slice的AMF设备，并将终端设备重新接入该重选的AMF。在本示例中，该重选的AMF设备为AMF-2设备。这样，终端设备才能够使用3GPP接入技术通过AMF-2设备接入支持3GPP接入技术的VoIP Slice，使用WLAN通过AMF-2设备接入支持WLAN的eMBB Slice，以达到多个切片可以共享同一个AMF设备的目的。
通过上述描述可知，由于终端设备初始接入的AN节点设备在通过上述方式为终端设备确定待接入的AMF设备时，仅是基于终端设备允许接入的切片的SST，并没有考虑终端设备接入切片时所使用的RAT。因此，终端设备在使用不同的RAT接入多个切片的时候，会出现如上述示例所示的AMF重选的情况。虽然这种重选AMF的方法，可以使终端设备通过同一个AMF同时接入多个切片，但是在终端设备通信过程中，执行AMF重选，使得信令开销较大、通信效率较低。
考虑到上述情况，本申请提出了一种接入方法，在该方法中，网络设备在为终端设备选择AMF设备时，不仅考虑终端设备允许接入的切片的SST，还考虑了终端设备接入允许接入的切片时所使用的RAT，从而使得网络设备为终端设备所选择的AMF可以支持终端设备采用多种RAT接入不同的切片，降低了在终端设备通信过程中AMF重选的几率，进而降低了信令开销，提高了通信效率。因此，本申请提供的接入方法，旨在解决现有技术中因AN节点设备仅通过终端设备的NSSAI为终端设备选择AMF设备，导致出现在终端设备通信过程中重选AMF设备的情况，使得信令开销较大、通信效率较低的技术问题。
图3为本申请提供的一种通信系统示意图。如图3所示，该通信系统包括：终端设备、AN节点设备、缺省AMF设备、至少一个AMF设备和签约数据库。图3示出的是以包括一个AMF设备为例的通信系统，但是本领域技术人员可以理解的是，本通信系统可以包括多个AMF设备，每个AMF设备与通信系统中的其他设备的连接方式均可以参照图3所示，对此不再赘述。
其中，AN节点设备用于将终端设备接入AMF设备。其中，本申请中的AN节点设备为终端设备当前所使用的RAT接入的AN节点设备。例如：若终端设备当前使用WLAN，则终端设备接入的AN节点设备可以为AP。若终端设备当前使用3GPP，则终端设备接入的AN节点设备可以为RAN。
缺省AMF设备为用于在接收到AN节点设备或其他AMF设备转发的终端设备的请求消息后，为终端设备选择接入的AMF设备。
上述多个AMF设备中的每个AMF设备可以连接有多个切片，该多个AMF用于根据连接在其上的终端设备的业务需求，为终端设备选择具体的切片。上述与AMF设备连接的每个切片均具有会话管理功能(Session Management Function，SMF)、用户面功能(User Plane Function，UPF)等。这里所说的切片用于处理和传输该切片对应的业务等。
上述签约数据库中存储有终端设备的签约信息，用于为缺省AMF设备和多个AMF设备提供终端设备的签约信息。
需要说明的是，上述通信系统可以是LTE通信系统，也可以是未来其他通信系统，在此不作限制。
下面以该通信系统为例，通过一些实施例对本申请的技术方案进行详细说明。下面这几个实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例不再赘述。
图4为本申请提供的一种接入方法的流程示意图。本实施例涉及的是网络设备根据终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，为终端设备选择AMF的过程。其中，这里所说的网络设备可以为网络侧任一具有为终端设备选择AMF设备功能的设备，例如：AN节点设备或AMF设备(例如：缺省AMF设备或者上述所说的多个AMF设备中的任一AMF等)，具体可以根据网络侧的配置和网络 侧设备的功能划分确定。如图4所示，该方法可以包括：
S101、网络设备获取第一信息，第一信息用于指示终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型。
例如，当终端设备初始接入网络时，网络设备可以获取到第一信息，进而通过第一信息可以获取到终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型。
当上述网络设备为AN节点设备时，AN节点设备可以获取存储在AN节点设备上的第一信息。或者，AN节点设备还可以通过接收终端设备发送给AN节点设备的第一信息，获取该第一信息。例如，AN节点设备可以通过从终端设备获取第一NSSAI，以获取携带在该第一NSSAI中的第一信息。或者，AN节点设备还可以从持有上述第一信息的AMF设备(简称：第二AMF设备)获取上述第一信息。例如，AN节点设备可以通过从第二AMF设备获取第二NSSAI，以获取携带在该第二NSSAI中的第一信息。
当上述网络设备为AMF设备时，AMF设备可以根据从签约数据库获取的信息确定上述第一信息等。或者，AMF设备还可以通过接收终端设备发送给AMF设备的第一信息，获取该第一信息。例如，AMF设备可以通过从终端设备获取第一NSSAI，以获取携带在该第一NSSAI中的第一信息。或者，AMF设备还可以从持有上述第一信息的其他AMF设备获取上述第一信息。AMF设备还可以通过从其他AMF设备获取第二NSSAI，以获取携带在该第二NSSAI中的第一信息。
其中，本实施例不限定上述第一信息如何指示终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型。例如，上述第一信息可以通过携带终端设备允许接入的切片的SST的标识、以及、接入允许接入的切片时允许使用的RAT类型的标识的方式，进行指示。关于上述SST和RAT类型可以沿用现有技术的分类方式，例如：上述RAT类型可以为下述任一项：UTRAN、GERAN、EUTRAN、全球网(Global Area Network,GAN，GAN)、增强型高速分组接入(High Speed Packet Access Evolution，HSPA Evolution)、不可信WLAN(Untrusted WLAN)、可信WLAN(Trusted WLAN)等。上述SST可以为下述任一项：增强的移动宽带(enhanced Mobile Broadband，eMBB)、超可靠低延迟通信(Ultra-reliable and low latency communications，URLLC)、大规模物联网(Massive Internet of Things，mIoT)、应急通信(Critical Communications)等。
S102、网络设备获取第二信息，第二信息用于指示AMF设备所连接的切片的SST，以及，所连接的切片支持的RAT类型。
例如，网络设备还可以获取第二信息，以根据第二信息获取到该网络设备能够连接到的核心网侧的AMF设备所连接的切片的SST，以及，该网络设备能够连接到的AMF设备所连接的切片支持的RAT类型。可选的，网络设备可以获取存储在网络设备上的第二信息。或者，网络设备还可以从能够连接到的每个AMF设备获取用于指示该AMF设备所连接的切片的SST，以及，该AMF设备所连接的切片支持的RAT类型的指示信息，此时，网络设备从能够连接到的AMF设备获取到的指示信息即为上述第二信息。或者，网络设备还可以从用于管理接入网络域内的接入网络设备的接入网络域管理器(Access Network Domain Manager，AN Domain Management)设备获取第二信息。
其中，本实施例不限定上述第二信息如何指示AMF设备所连接的切片的SST，以及， 所连接的切片支持的RAT类型。例如：上述第二信息可以通过携带AMF设备的标识、AMF设备所连接的切片的SST，以及，所连接的切片支持的RAT类型的方式，进行指示。
S103、网络设备根据第一信息和第二信息，为终端设备选择服务终端设备的第一AMF设备。
例如，网络设备通过第一信息获知终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，通过第二信息获知能够连接到的每个AMF设备所连接的切片的SST，以及，能够连接到的每个AMF设备所连接的切片支持的RAT类型之后，网络设备可以基于这些信息，为终端设备选择服务终端设备的第一AMF设备，以使得终端设备可以使用多个类型的RAT，通过第一AMF设备接入不同的切片。可选的，网络设备可以通过匹配第一信息和第二信息的方式，选择支持终端设备允许接入的SST，以及，接入所允许接入的SST时允许使用的RAT类型的AMF设备作为第一AMF设备。
本申请提供的接入方法，网络设备在为终端设备选择AMF时，不仅要考虑终端设备允许接入的切片的SST，还要考虑终端设备接入允许接入的切片时允许使用的RAT类型，从而使得网络设备为终端设备所选择的第一AMF可以支持终端设备使用多个类型的RAT接入不同的切片，而不会出现因未考虑终端设备接入允许接入的切片时允许使用的RAT类型，导致终端设备初始接入时所接入的AMF可能无法满足终端设备使用多个类型的RAT接入不同的切片，进而需要在终端设备通信过程中执行为终端设备重选AMF的流程。因此，本申请的方法，可以降低为终端设备重选AMF的几率，进而减少信令开销，提高了通信效率。
图5为本申请提供的另一种接入方法的流程示意图。如上所述，当上述网络设备为AN节点设备时，AN节点设备可以通过从终端设备获取第一NSSAI，以获取携带在该第一NSSAI中的第一信息。具体实现时，AN节点设备可以通过接收终端设备发送的第一NSSAI，获取该第一NSSAI。例如，AN节点设备可以通过接收终端设备发送的携带有第一NSSAI的请求消息，获取该第一NSSAI。本实施例涉及的是AN节点设备根据终端设备发送的第一请求消息携带的第一NSSAI，获取终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，并为终端设备选择AMF设备的过程。其中，第一NSSAI包括：第一信息。如图5所示，该方法可以包括：
S201、终端设备向AN节点设备发送第一请求消息。
其中，第一请求消息包括：终端设备的标识、第一NSSAI等。第一NSSAI为配置NSSAI或接受/允许的NSSAI。
例如，在本实施例中，当终端设备初始接入网络时，终端设备可以向AN节点设备发送第一请求消息。该第一请求消息可以包括：终端设备的标识、第一NSSAI等。其中，终端设备的标识可以为任一能够唯一标识该终端设备的标识，例如：终端设备的国际移动用户识别码(International Mobile Subscriber Identification Number，IMSI)。第一NSSAI包括用于指示终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型的第一信息。本实施例不限定上述第一NSSAI中的第一信息所包括的内容，例如：上述第一信息可以包括下述表1所示的内容。
表1
Figure PCTCN2017079236-appb-000001
Figure PCTCN2017079236-appb-000002
其中，上述表1所示的RAT类型中每个RAT类型可以为每个RAT类型的标识，还可以为每个RAT类型对应的预设数值。该RAT类型与预设数值之间的关系例如可以如下述表2所示。
表2
RAT类型 取值
<reserved> 0
UTRAN 1
GERAN 2
EUTRAN 3
GAN 4
HSPA Evolution 5
Untrusted WLAN 6
Trusted WLAN 7
需要说明的是，上述表1和表2仅为一种示例，本申请所涉及的第一信息并不以上述表1和表2为限，只要是能够指示终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型的第一信息，均在本申请的保护范围内。
可选的，上述携带在第一请求消息中的第一NSSAI可以为配置的NSSAI，也可以为接受/允许的NSSAI，具体可以根据终端设备所存储的NSSAI确定。其中，这里所说的配置的NSSAI可以为终端设备上的配置的缺省NSSAI。接受/允许的NSSAI可以为终端设备签约的NSSAI或网络侧根据终端设备签约的NSSAI和网络侧的能力确定的接受/允许的NSSAI。
可选的，上述第一请求消息可以为终端设备执行注册流程时发送的注册请求消息，或者，终端设备执行附着接入流程时发送的附着请求消息，或者，终端设备执行位置区更新流程时发送的位置区更新请求消息等。
S202、AN节点设备接收该第一请求消息。
S203、AN节点设备获取第二信息。
其中，第二信息用于指示接入和移动性管理功能AMF设备所连接的切片的SST，以及，所连接的切片支持的RAT类型。
例如，本步骤的相关描述可以参见步骤S102的描述，对此不再赘述。
S204、AN节点设备根据第一信息和第二信息，为终端设备选择服务终端设备的第一 AMF设备。
例如，本步骤的相关描述可以参见步骤S103的描述，对此不再赘述。
至此，AN节点设备完成了基于终端设备发送的第一请求消息携带的第一NSSAI，为终端设备选择服务终端设备的第一AMF设备的过程。
本申请提供的接入方法，AN节点设备在接收到终端设备的第一请求消息后，可以根据第一请求消息中携带的第一NSSAI所包括的第一信息，为终端设备选择接入的第一AMF。由于AN节点设备在为终端设备选择第一AMF设备时，不仅考虑了终端设备允许接入的切片的SST，还考虑了终端设备接入允许接入的切片时允许使用的RAT类型，因此，确保了所选择的第一AMF设备可以支持终端设备使用多个类型的RAT接入不同的切片，而不会出现因未考虑终端设备接入允许接入的切片时允许使用的RAT类型，导致终端设备初始接入时所接入的AMF可能无法满足终端设备使用多个类型的RAT接入不同的切片，进而需要在终端设备通信过程中执行为终端设备重选AMF的流程。因此，本申请的方法，可以降低为终端设备重选AMF的几率，进而减少信令开销，提高了通信效率。
图6为本申请提供的又一种接入方法的流程示意图。本实施例涉及的是AN节点设备将终端设备接入第一AMF设备的过程。如图6所示，在上述S204之后，该方法还可以包括：
S301、AN节点设备向第一AMF设备转发终端设备发送的第一请求消息。
其中，第一请求消息包括：终端设备的标识、第一NSSAI等。第一NSSAI为配置NSSAI或接受/允许的NSSAI。
S302、第一AMF设备接收该第一请求消息。
S303、第一AMF设备向签约数据库发送查询请求消息。
其中，查询请求消息包括：终端设备的标识。
现有技术中，AMF设备在接收到AN节点设备转发的第一请求消息之后，AMF设备需要根据终端设备的签约信息对终端设备进行认证，以确定所述终端设备是否被允许接入网络。因此，第一AMF设备在接收到AN节点设备转发的第一请求消息之后，第一AMF设备可以根据第一请求消息中携带的终端设备的标识，从存储有每个终端设备的签约信息的签约数据库获取终端设备的签约信息。
与现有技术中不同的是，本申请的签约数据库中存储的每个终端设备的签约信息，还包括有每个终端设备的第三NSSAI。其中，该第三NSSAI可以包括终端设备签约的切片的SST，以及，接入签约的切片时允许使用的RAT类型，即该第三NSSAI可以为终端设备签约的NSSAI。或者，该第三NSSAI可以包括终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，即该第三NSSAI可以为终端设备的允许/接受的NSSAI。
因此，第一AMF设备在接收到AN节点发送的第一请求消息之后，可以根据该第一请求消息中携带的终端设备的标识，向签约数据库发送携带有终端设备的标识的查询请求消息，以获取终端设备的签约信息，所述签约信息包括终端设备的第三NSSAI。
S304、签约数据库向第一AMF设备发送查询响应消息。
其中，查询响应消息包括：终端设备的签约信息。
例如，签约数据库在接收到该查询消息之后，可以在自身数据库中，查找该终端设备的标识所对应的携带有第三NSSAI的签约信息，并将该签约信息携带在查询响应消息中发 送给第一AMF设备。
S305、第一AMF设备根据查询响应消息，确定第二NSSAI。
例如，若第三NSSAI为终端设备签约的NSSAI，则第一AMF设备在接收到签约数据库发送的携带有签约信息的查询响应消息之后，可以根据签约信息中携带的第三NSSAI(即终端设备签约的NSSAI)和网络侧能力，确定该终端设备的允许/接受的NSSAI，即第二NSSAI。若第三NSSAI为终端设备的允许/接受的NSSAI，则第一AMF设备在接收到签约数据库发送的携带有签约信息的查询响应消息之后，可以将该签约信息中携带的第三NSSAI作为第二NSSAI。其中，上述第二NSSAI可以包括：终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型。
第一AMF设备根据终端设备签约的NSSAI和网络侧能力，确定该终端设备的允许/接受的NSSAI的方式可以参见现有技术，对此不再赘述。
本领域技术人员可以理解的是上述S303至S305仅为一种根据签约数据库中获取的信息确定第一信息的示意，本申请获取第一信息的方式并不以此为限。
S306、第一AMF设备向终端设备发送第一接受消息。
其中，接受消息包括：终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型。
例如，第一AMF设备在接收到查询响应消息后，可以基于第二NSSAI获取到准确的第一信息，进而可以将该第一信息携带在第一接受消息中，通过AN节点设备发送给终端设备。其中，该第一接受消息中可以携带上述第一信息、第一AMF设备为终端设备分配的临时标识等。这样，终端设备在接收到该第一接受消息后，可以存储这些信息，以在后续的信令交互过程中携带这些信息中的部分或全部信息。
可选的，上述第一AMF设备在接收到查询响应消息后，还可以基于第二NSSAI获取到准确的第一信息、第一AMF设备所连接的切片的SST、第一AMF设备所连接的切片支持的RAT类型，确定第一AMF设备是否能够为终端设备提供服务。即，确定第一AMF设备是否支持终端设备允许接入的SST，以及，接入所允许接入的SST时允许使用的RAT类型。第一AMF设备在确定能够为终端设备提供服务时，向终端设备发送第一接受消息。通过这种方式，可以进一步确保为终端设备所选择的第一AMF设备是否正确，降低了终端设备在通信过程中，重选AMF设备的情况。其中，上述第一AMF设备所连接的切片的SST、第一AMF设备所连接的切片支持的RAT类型可以为预设在第一AMF设备上的，还可以为第一AMF设备从接入网络域管理设备获取到的等。
至此，完成了将终端设备接入第一AMF设备的过程。
本申请提供的接入方法，AN节点设备在为终端设备选择第一AMF设备之后，可以将终端设备接入该第一AMF设备，从而使得终端设备可以使用多个类型的RAT，通过第一AMF设备接入不同的切片，而不会出现因未考虑终端设备接入允许接入的切片时允许使用的RAT类型，导致终端设备初始接入时所接入的AMF可能无法满足终端设备使用多个类型的RAT接入不同的切片，进而需要执行为终端设备重选AMF的流程。因此，本申请的方法，可以降低在终端设备通信过程中为终端设备重选AMF的几率，进而减少信令开销，提高了通信效率。
图7为本申请提供的又一种接入方法的流程示意图。如图7所示，本实施例涉及的是上 述终端设备在接入第一AMF设备之后，如何通过第一AMF设备接入切片的过程，则在上述S305之后，该方法还可以包括：
S401、终端设备向AN节点设备发送第二请求消息。
其中，第二请求消息用于指示终端设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型。可选的，该第二请求消息可以为会话请求消息等。该终端设备待接入切片为终端设备允许接入的切片中的任一个。
例如，当终端设备根据终端设备的业务需求，确定需要接入终端设备允许接入的切片中的某一切片时，终端设备可以向AN节点发送第二请求消息。本实施例不限定上述第二请求消息指示终端设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型的方式，例如：第二请求消息可以包括：终端设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型。
S402、AN节点设备向第一AMF设备发送第二请求消息。
例如，在前述实施例中，AN节点设备在向终端设备转发第一AMF设备的第一接受消息时，AN节点设备可以记录该终端设备与第一AMF设备的映射关系。因此，AN节点设备在收到第二请求消息之后，可以将第二请求消息转发给第一AMF设备，具体的实现方式可参见现有技术，对此不再赘述。
S403、第一AMF设备接收该第二请求消息。
S404、第一AMF设备根据第二请求消息、第一AMF设备所连接的切片的SST、第一AMF设备所连接的切片支持的RAT类型，为终端设备选择提供服务的切片。
例如，第一AMF设备在接收到AN设备转发的第二请求消息之后，可以根据该第二请求消息所指示的终端设备待接入切片的SST、终端设备接入待接入切片时使用的RAT类型，以及，第一AMF设备所连接的切片的SST、第一AMF设备所连接的切片支持的RAT类型，选择第一AMF设备所连接的切片中，与终端设备待接入的切片的SST和该切片支持的RAT类型相同的切片为终端设备提供服务。
可选的，第一AMF设备在为终端设备选择提供服务的切片之后，可以向为终端设备提供服务的切片发送第二请求消息。这样，该为终端设备提供服务的切片可以根据第二请求消息，为终端设备建立会话，并通过第一AMF设备向终端设备返回第二响应消息。终端设备在接收到第二响应消息之后，确定接入该切片后，可以通过该切片进行与该切片对应的业务的传输。其中，上述第二响应消息例如可以为会话应答消息。该会话应答消息可以包括：终端设备的网络之间互连的协议(Internet Protocol，IP)地址、终端设备允许接入的切片的SST，以及，接入允许接入切片时使用的RAT类型等。其中，终端设备允许接入的切片的SST，以及，接入允许接入切片时使用的RAT类型可以是第二请求消息中指示的终端设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型。需要说明的是，为终端设备提供服务的切片根据第二请求消息，为终端设备建立会话，并通过第一AMF设备向终端设备返回第二响应消息的过程，可以参见现有技术，对此不再赘述。
至此，完成了为终端设备选择提供服务的切片的流程。
本申请提供的接入方法，AN节点设备在将终端设备接入第一AMF设备之后，终端设备可以向第一AMF设备发送用于指示终端设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型的第二请求消息，以使得第一AMF设备可以基于待接入切片的 SST和接入该切片所使用的RAT类型，为终端设备选择正确的切片，提高了切片接入的准确性。
图8为本申请提供的又一种接入方法的流程示意图。如上述实施例所述，当上述网络设备为AN节点设备时，AN节点设备可以通过从第二AMF设备获取第二NSSAI，以获取携带在该第二NSSAI中的第一信息。本实施例以第二AMF设备为缺省AMF设备为例，涉及的是AN节点设备接收到终端设备所发送的第一请求消息中未携带包括第一信息的第一NSSAI时，通过从缺省AMF设备获取第二NSSAI，获取终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，并为终端设备选择AMF设备的过程。如图8所示，该方法可以包括：
S501、终端设备向AN节点设备发送第一请求消息。
其中，第一请求消息包括：终端设备的标识。
例如，当终端设备初始接入网络时，终端设备可以向AN节点设备发送第一请求消息。该第一请求消息可以包括：终端设备的标识等。其中，终端设备的标识可以为任一能够唯一标识该终端设备的标识，例如：终端设备的IMSI。
可选的，上述第一请求消息可以为终端设备执行注册流程时发送的注册请求消息，或者，终端设备执行附着接入流程时发送的附着请求消息，或者，终端设备执行跟踪区更新流程时发送的跟踪区更新请求消息等。
S502、AN节点设备向缺省AMF设备发送第一请求消息。
例如，由于终端设备向AN节点设备所发送的第一请求消息中未携带包括第一信息的第一NSSAI，因此，AN节点设备可以将第一请求消息发送给缺省AMF设备，以通过缺省AMF设备获取到第一信息。
S503、缺省AMF设备向签约数据库发送查询请求消息。
其中，查询请求消息包括：终端设备的标识。
例如，缺省AMF设备在接收到AN节点发送的第一请求消息之后，可以根据该第一请求消息中携带的终端设备的标识，向签约数据库发送携带有终端设备的标识的查询请求消息。
其中，关于签约数据库的描述，可以参见上述步骤S303，对此不再赘述。
S504、签约数据库向缺省AMF设备发送查询响应消息。
其中，查询响应消息包括：终端设备的签约信息。
S505、缺省AMF设备根据查询响应消息，确定第二NSSAI。
其中，步骤S504和S505的描述，可以参见上述步骤S304和S305，在此不再赘述。
S506、缺省AMF设备向AN节点设备发送第二NSSAI。
S507、AN节点设备获取第二信息。
其中，第二信息用于指示接入和移动性管理功能AMF设备所连接的切片的SST，以及，所连接的切片支持的RAT类型。
例如，本步骤的相关描述可以参见步骤S102的描述，对此不再赘述。
S508、AN节点设备根据第一信息和第二信息，为终端设备选择服务终端设备的第一AMF设备。
例如，本步骤的相关描述可以参见步骤S103的描述，对此不再赘述。
至此，AN节点设备完成了基于从第二AMF设备获取的第二NSSAI，为终端设备选择服务终端设备的第一AMF设备的过程。
本领域技术人员可以理解的是，若通信系统中的位于网络侧的其他设备，也可以接收到AN节点设备所发送的第一请求消息，并基于该第一请求消息，向AN节点设备返回第一信息时，其他设备也可以取代缺省AMF设备执行上述图8所示的流程，对此不再赘述。
需要说明的是，本实施例的方法，不仅适用于终端设备所发送的第一请求消息中未携带包括第一信息的第一NSSAI的场景，还适用于第一请求消息中携带了第一NSSAI，但是该第一NSSAI仅包括了用于指示终端设备允许接入的切片的SST的信息，并没有包括用于指示终端设备接入允许接入的切片时允许使用的RAT类型的信息的场景，例如：现有技术中为终端设备选择AMF设备的场景。
进一步地，在上述步骤S508之后，该方法还可以执行如上述图6、图7所示的实施例，对此不再赘述。
本申请提供的接入方法，AN节点设备在接收到未携带第一NSSAI的第一请求消息后，AN节点设备可以从缺省AMF设备获取第二NSSAI，并基于第二NSSAI所包括的第一信息，为终端设备选择接入的第一AMF。由于AN节点设备在为终端设备选择第一AMF设备时，不仅考虑了终端设备允许接入的切片的SST，还考虑了终端设备接入允许接入的切片时允许使用的RAT类型，因此，确保了所选择的第一AMF设备可以支持终端设备使用多个类型的RAT接入不同的切片，而不会出现因未考虑终端设备接入允许接入的切片时允许使用的RAT类型，导致终端设备初始接入时所接入的AMF可能无法满足终端设备使用多个类型的RAT接入不同的切片，进而需要执行为终端设备重选AMF的流程。因此，本申请的方法，可以降低在终端设备通信过程中为终端设备重选AMF的几率，进而减少信令开销，提高了通信效率。
图9为本申请提供的又一种接入方法的流程示意图。如上述实施例所说，当上述网络设备为AMF设备时，AMF设备可以根据从签约数据库获取的信息确定第一信息。本实施例以AMF设备为缺省AMF设备为例，涉及的是在终端设备所发送的第一请求消息中未携带第一NSSAI时，缺省AMF设备根据从签约数据库获取的信息确定第一信息，获取终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型，并为终端设备选择AMF设备的过程。如图9所示，该方法可以包括：
S601、终端设备向AN节点设备发送第一请求消息。
其中，第一请求消息包括：终端设备的标识。
S602、AN节点设备向缺省AMF设备发送第一请求消息。
S603、缺省AMF设备向签约数据库发送查询请求消息。
其中，查询请求消息包括：终端设备的标识。
S604、签约数据库向缺省AMF设备发送查询响应消息。
其中，查询响应消息包括：终端设备的签约信息。
S605、缺省AMF设备根据查询响应消息，确定第二NSSAI。
步骤S601-S605的描述可以参见上述S501-S505的描述，在此不再赘述。
S606、缺省AMF设备获取第二信息。
其中，第二信息用于指示接入和移动性管理功能AMF设备所连接的切片的SST，以及， 所连接的切片支持的RAT类型。
本步骤的相关描述可以参见步骤S102的描述，对此不再赘述。
S607、缺省AMF设备根据第一信息和第二信息，为终端设备选择服务终端设备的第一AMF设备。
例如，本步骤的相关描述可以参见步骤S103的描述，对此不再赘述。
S608、缺省AMF设备向AN节点设备发送第一AMF设备的标识。
例如，缺省AMF设备在基于第一信息和第二信息，为终端设备选择终端设备的第一AMF设备之后，缺省AMF设备可以向AN节点设备发送第一AMF设备的标识，以使得AN节点设备可以基于该第一AMF设备的标识，将终端设备发送的第一请求消息转发给第一AMF设备，以执行接入第一AMF设备的流程。具体实现时，缺省AMF设备可以将第一AMF设备的标识携带在重路由请求消息中，发送给AN节点设备等。
至此，缺省AMF设备完成了基于从签约数据库获取的第三NSSAI，为终端设备选择服务终端设备的第一AMF设备的过程。
本领域技术人员可以理解的是，若通信系统中的位于网络侧的其他设备，也可以接收到AN节点设备所发送的第一请求消息，并基于该第一请求消息，为终端设备选择服务终端设备的第一AMF设备时，其他设备也可以取代缺省AMF设备执行上述图9所示的流程，对此不再赘述。
需要说明的是，本实施例的方法，不仅适用于终端设备所发送的第一请求消息中未携带包括第一信息的第一NSSAI的场景，还适用于第一请求消息中携带了第一NSSAI，但是该第一NSSAI仅包括了用于指示终端设备允许接入的切片的SST的信息，并没有包括用于指示终端设备接入允许接入的切片时允许使用的RAT类型的信息的场景，例如：现有技术中为终端设备选择AMF设备的场景。
进一步地，在上述步骤S608之后，该方法还可以执行如上述图6、图7所示的实施例，对此不再赘述。
本申请提供的接入方法，缺省AMF设备在接收到未携带第一NSSAI的第一请求消息后，缺省AMF设备可以从签约数据库获取第三NSSAI，并基于第三NSSAI确定第二NSSAI，基于第二NSSAI所包括的第一信息为终端设备选择接入的第一AMF。由于缺省AMF设备在为终端设备选择第一AMF设备时，不仅考虑了终端设备允许接入的切片的SST，还考虑了终端设备接入允许接入的切片时允许使用的RAT类型，因此，确保了所选择的第一AMF设备可以支持终端设备使用多个类型的RAT接入不同的切片，而不会出现因未考虑终端设备接入允许接入的切片时允许使用的RAT类型，导致终端设备初始接入时所接入的AMF可能无法满足终端设备使用多个类型的RAT接入不同的切片，进而需要执行为终端设备重选AMF的流程。因此，本申请的方法，可以降低在终端设备通信过程中为终端设备重选AMF的几率，进而减少信令开销，提高了通信效率。
图10为本申请提供的又一种接入方法的流程示意图。当上述终端设备发送的第一请求消息携带的第一NSSAI，未包括用于指示终端设备接入允许接入的切片时允许使用的RAT类型的信息，AN节点设备基于该第一NSSAI为终端设备所选择的AMF设备可能并非是第一AMF设备。假定AN节点设备为终端设备所选择的AMF设备不是第一AMF设备，在本实施例中，该AMF设备为第三AMF设备。则本实施例涉及的是第三AMF设备触发为终端设 备重选AMF设备的过程。如图10所示，该方法包括：
S701、终端设备向AN节点设备发送第一请求消息。
其中，第一请求消息包括：终端设备的标识和第一NSSAI。此时，第一NSSAI，未包括用于指示终端设备接入允许接入的切片时允许使用的RAT类型的信息。
S702、AN节点设备根据第一请求消息，确定为终端设备服务的第三AMF设备。
例如，由于AN节点设备在为终端设备确定待接入的AMF设备时，仅是基于终端设备允许接入的切片的SST，并没有考虑终端设备接入切片时所使用的RAT。因此，该第三AMF设备可能并不能支持终端设备使用不同的RAT接入多个切片的场景。
S703、AN节点设备向第三AMF设备发送第一请求消息。
S704、第三AMF设备接收该第一请求消息。
S705、第三AMF设备向签约数据库发送查询请求消息。
其中，查询请求消息包括：终端设备的标识。
S706、签约数据库向第三AMF设备发送查询响应消息。
其中，查询响应消息包括：终端设备的签约信息。
S707、第三AMF设备根据查询响应消息，确定第二NSSAI。
其中，步骤S705至S707的描述，可以参见上述步骤S503至S505，在此不再赘述。
S708、第三AMF设备根据第一信息、第三AMF设备所连接的切片的SST、第三AMF设备所连接的切片支持的RAT类型，确定第三AMF设备是否能够为终端设备提供服务。
例如，上述第三AMF设备在根据签约数据库获取到第三NSSAI确定包括第一信息的第二NSSAI之后，可以根据第一信息所指示的终端设备允许接入的切片的SST、终端设备接入允许接入的切片时允许使用的RAT类型，第三AMF设备所连接的切片的SST、第三AMF设备所连接的切片支持的RAT类型，确定第三AMF设备是否支持终端设备允许接入的SST，以及，接入所允许接入的SST时允许使用的RAT类型。通过这种方式，可以进一步确保为终端设备所选择的第三AMF设备是否正确，降低了终端设备在通信过程中，重选AMF设备的情况。可选的，上述第三AMF设备所连接的切片的SST、第三AMF设备所连接的切片支持的RAT类型可以为预设在第三AMF设备上的，还可以为第三AMF设备从接入网络域管理设备获取到的等。
由于AN节点设备在为终端设备确定第三AMF设备时，仅是基于终端设备允许接入的切片的SST，并没有考虑终端设备接入切片时所使用的RAT。因此，该第三AMF设备可能并不能支持终端设备使用不同的RAT接入多个切片的场景。
在本实施例中，若确定第三AMF设备不支持终端设备允许接入的SST，和/或，接入所允许接入的SST时允许使用的RAT类型，即第三AMF设备无法为终端设备提供服务，则执行步骤S709。
S709、第三AMF设备在确定无法为终端设备提供服务时，第三AMF设备触发AMF设备重选操作。
例如，当第三AMF设备在确定无法为终端设备提供服务时，第三AMF设备触发AMF设备重选操作，以为终端设备确定一个可以支持终端设备使用多个类型的RAT接入不同的切片的AMF设备，即第一AMF设备，从而降低在终端设备通信过程中为终端设备重选AMF的几率。
可选的，第三AMF设备可以根据从签约数据库所获取终端设备签约的NSSAI信息，确定第一信息，执行为终端设备重选AMF设备的流程。具体实现时，第三AMF设备可以获取第二信息，以根据第一信息和第二信息，为终端设备选择服务终端设备的第一AMF设备，并通过例如拒绝消息向AN节点设备发送第一AMF设备的标识，以使得AN节点设备可以将终端设备接入第一AMF设备。其中，第三AMF根据第一信息和第二信息，为终端设备选择服务终端设备的第一AMF设备的实现方式，可以参见上述步骤S606至S608的描述。
可选的，第三AMF设备还可以向第二AMF设备(例如：缺省AMF设备等)发送第三请求消息，以触发第二AMF设备为终端设备重选AMF设备。第二AMF设备在获取到该第三请求消息之后，可以执行如步骤S603-S607所示的步骤，以获取第一信息和第二信息，并根据第一信息和第二信息，为终端设备选择服务终端设备的第一AMF设备，向第三AMF设备发送第一AMF设备的标识。这样，第三AMF设备可以通过例如拒绝消息将第一AMF设备的标识发送给AN节点设备，以使得AN节点设备可以将终端设备接入第一AMF设备。具体实现时，上述第三请求消息例如可以为重路由请求消息，第二AMF设备在向第三AMF设备发送第一AMF设备的标识时，可以通过重路由接受消息发送给第三AMF设备。
可选的，第三AMF设备还可以向AN节点设备发送拒绝消息，以触发AN节点设备为终端设备重选AMF设备。其中，AN节点设备例如可以通过如步骤S502至S508、或步骤S602-S608所示的方式为终端设备重选AMF设备，对此不再赘述。
需要说明的是，本实施例的方法，不仅适用于第一NSSAI仅包括了用于指示终端设备允许接入的切片的SST的信息，并没有包括用于指示终端设备接入允许接入的切片时允许使用的RAT类型的信息的场景，还适用于上述第一NSSAI包括了错误的第一信息的场景，其实现原理和技术效果类似，对此不再赘述。
本申请提供的接入方法，当AN节点设备在将终端设备接入错误的AMF设备上时，该错误的AMF设备可以触发AMF设备重选操作，以确保将终端设备能够接入到支持终端设备使用多个类型的RAT接入不同的切片的第一AMF设备上，降低在终端设备通信过程中为终端设备重选AMF的几率，进而减少信令开销，提高了通信效率。
图11为本申请提供的一种网络设备的结构示意图。如图11所示，该网络设备可以包括：第一获取模块11、第二获取模块12和选择模块13。其中，
第一获取模块11，用于获取第一信息，第一信息用于指示终端设备允许接入的切片的切片/业务类型SST，以及，接入允许接入的切片时允许使用的无线接入技术RAT类型；
第二获取模块12，用于获取第二信息，第二信息用于指示接入和移动性管理功能AMF设备所连接的切片的SST，以及，AMF设备所连接的切片支持的RAT类型；
选择模块13，用于根据第一信息和第二信息，选择服务终端设备的第一AMF设备。
可选的，当网络设备为接入网络节点设备时，第一获取模块11，具体用于从终端设备获取第一网络切片选择辅助信息，第一网络切片选择辅助信息包括第一信息。例如：第一获取模块11，具体用于从终端设备接收第一请求消息，其中，第一请求消息携带第一网络切片选择辅助信息，第一网络切片选择辅助信息为配置的网络切片选择辅助信息或接受的网络切片选择辅助信息。或者，当网络设备为接入网络节点设备时，第一获取模块11，具体用于从第二AMF设备获取第二网络切片选择辅助信息，第二网络切片选择辅助信息包括第一信息。示例性的，第二网络切片选择辅助信息可以为接受的网络切片选择辅助信息。
可选的，当网络设备为第二AMF设备时，第一获取模块11，具体用于从签约数据库获取终端设备的签约信息，并根据终端设备的签约信息，确定第一信息。示例性的，签约信息可以包括终端设备签约的的切片的SST，以及，接入签约的切片时允许使用的RAT类型；或，签约信息包括终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型。
可选的，第二获取模块，具体用于从AMF设备获取第二信息；或，从接入网络域管理设备获取第二信息。
可选的，选择模块，具体用于匹配第一信息和第二信息，选择支持终端设备允许接入的SST，以及，接入所允许接入的SST时允许使用的RAT类型的AMF设备作为第一AMF设备。
本申请提供的网络设备，在网络设备为AN节点设备时，可以执行上述图4、图5、图8所示的方法实施例中AN节点设备侧的动作，其实现原理和技术效果类似，在此不再赘述。在网络设备为第二AMF设备时，可以执行上述图9所示的方法实施例中缺省AMF设备侧的动作，其实现原理和技术效果类似，在此不再赘述。
图12为本申请提供的一种AMF设备的结构示意图。如图12所示，该AMF设备可以包括：第一接收模块21、获取模块22、确定模块23和发送模块24。其中，
第一接收模块21，用于从接入网络节点设备接收终端设备发送的第一请求消息，第一请求消息携带终端设备的标识；
获取模块22，用于根据终端设备的标识信息，从签约数据库获取终端设备的标识对应的签约信息；示例性的，签约信息包括终端设备签约的的切片的SST，以及，接入签约的切片时允许使用的RAT类型；或，签约信息包括终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型。
确定模块23，用于根据签约信息，确定终端设备允许接入的切片的切片/业务类型SST，以及，接入允许接入的切片时允许使用的无线接入技术RAT类型；
发送模块24，用于向终端设备发送第一接受消息，第一接受消息包括：终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型。
继续参照图12，可选的，在本申请的另一实现方式中，上述AMF设备还可以包括：
第二接收模块25，用于在发送模块24向终端设备发送接受消息之后，从接入网络节点设备接收终端设备发送的第二请求消息，第二请求消息用于指示终端设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型；
选择模块26，用于根据第二请求消息、AMF设备所连接的切片的SST、AMF设备所连接的切片支持的RAT类型，为终端设备选择提供服务的切片。
本申请提供的AMF设备时，可以执行上述图6和图7所示的第一AMF设备侧的动作，其实现原理和技术效果类似，在此不再赘述。
图13为本申请提供的一种终端设备的结构示意图。如图13所示，该终端设备可以包括：发送模块31和接收模块32。其中，
发送模块31，用于通过接入网络节点设备向接入和移动性管理功能AMF设备发送第一请求消息，第一请求消息携带终端设备的标识信息；
接收模块32，用于通过接入网络节点设备接收AMF设备发送的第一接受消息，第一接 受消息包括：终端设备允许接入的切片的切片/业务类型SST，以及，接入允许接入的切片时允许使用的无线接入技术RAT类型。
可选的，上述第一请求消息，还包括：第一网络切片选择辅助信息；
第一网络切片选择辅助信息为配置的网络切片选择辅助信息或接受的网络切片选择辅助信息。
本申请提供的终端设备时，可以执行上述图5至图10所示的终端设备侧的动作，其实现原理和技术效果类似，在此不再赘述。
图14为本申请提供的另一种AMF设备的结构示意图。如图14所示，该AMF设备可以包括：接收模块41、获取模块42、第一确定模块43、第二确定模块44和触发模块45。其中，
接收模块41，用于从接入网络节点设备接收终端设备发送的第一请求消息，第一请求消息携带终端设备的标识信息；
获取模块42，用于根据终端设备的标识信息，从签约数据库获取终端设备的签约信息；
第一确定模块43，用于根据终端设备的签约信息，确定第一信息，第一信息用于指示终端设备允许接入的切片的切片/业务类型SST，以及，接入允许接入的切片时允许使用的无线接入技术RAT类型；示例性的，签约信息包括终端设备签约的的切片的SST，以及，接入签约的切片时允许使用的RAT类型；或，签约信息包括终端设备允许接入的切片的SST，以及，接入允许接入的切片时允许使用的RAT类型。
第二确定模块44，用于根据第一信息、AMF设备所连接的切片的SST、AMF设备所连接的切片支持的RAT类型，确定AMF设备是否能够为终端设备提供服务；
触发模块45，用于在AMF设备无法为终端设备提供服务时，触发AMF设备重选操作。
可选的，触发模块45，具体用于根据第一信息为终端设备重选AMF设备；或者向第二AMF设备发送第三请求消息，第三请求消息用于指示第二AMF设备为终端设备重选AMF设备；或者，向接入网络节点设备发送拒绝消息，拒绝消息用于指示接入网络节点设备为终端设备重选AMF设备。
本申请提供的AMF设备时，可以执行上述图10所示的第三AMF设备侧的动作，其实现原理和技术效果类似，在此不再赘述。
需要说明的是，应理解以上发送模块实际实现时可以为发送器，接收模块实际实现时可以为接收器。而确定模块、获取模块、选择模块、触发模块的划分仅仅是一种逻辑功能的划分，实际实现时一个设备上的各个模块可以全部或部分集成到一个物理实体上，也可以物理上分开。且一个设备上的这些模块可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分模块通过处理元件调用软件的形式实现，部分模块通过硬件的形式实现。例如，确定模块可以为单独设立的处理元件，也可以集成在上述装置的某一个芯片中实现，此外，也可以以程序代码的形式存储于上述某一装置的存储器中，由该装置的某一个处理元件调用并执行以上确定模块的功能。其它模块的实现与之类似。此外一个设备上的这些模块全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件可以是一种集成电路，具有信号的处理能力。在实现过程中，上述方法的各步骤或一个设备上的以上各个模块可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。
例如，以上这些模块可以是被配置成实施以上方法的一个或多个集成电路，例如：一 个或多个特定集成电路(Application Specific Integrated Circuit，ASIC)，或，一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)等。再如，当以上某个模块通过处理元件调度程序代码的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，简称CPU)或其它可以调用程序代码的处理器。再如，一个设备上的这些模块可以集成在一起，以片上系统(system-on-a-chip，简称SOC)的形式实现。
图15为本申请提供的另一种网络设备的结构示意图。如图15所示，该终端设备可以包括：处理器51(例如CPU)、存储器52、接收器53、发送器54；接收器53和发送器54均耦合至处理器51，处理器51控制接收器53的接收动作、处理器51控制发送器54的发送动作；存储器52可能包含高速RAM存储器，也可能还包括非易失性存储器NVM，例如至少一个磁盘存储器，存储器52中可以存储各种指令，以用于完成各种处理功能以及实现本申请的方法步骤。可选的，本申请涉及的终端设备还可以包括：电源55、通信总线56以及通信端口57。接收器53和发送器54可以集成在终端设备的收发信机中，也可以为终端设备上独立的收发天线。通信总线56用于实现元件之间的通信连接。上述通信端口57用于实现终端设备与其他外设之间进行连接通信。
在本申请中，在网络设备为AN节点设备时，上述存储器52用于存储计算机可执行程序代码，程序代码包括指令；当处理器51执行指令时，指令使网络设备执行上述图4、图5、图8所示的AN节点设备侧的动作，其实现原理和技术效果类似，在此不再赘述。
在本申请中，在网络设备为第二AMF设备时，上述存储器52用于存储计算机可执行程序代码，程序代码包括指令；当处理器51执行指令时，指令使网络设备执行上述图9所示的缺省AMF设备侧的动作，其实现原理和技术效果类似，在此不再赘述。
图16为本申请提供的又一种AMF设备的结构示意图。如图16所示，该终端设备可以包括：处理器61(例如CPU)、存储器62、接收器63、发送器64；接收器63和发送器64均耦合至处理器61，处理器61控制接收器63的接收动作、处理器61控制发送器64的发送动作；存储器62可能包含高速RAM存储器，也可能还包括非易失性存储器NVM，例如至少一个磁盘存储器，存储器62中可以存储各种指令，以用于完成各种处理功能以及实现本申请的方法步骤。可选的，本申请涉及的终端设备还可以包括：电源65、通信总线66以及通信端口67。接收器63和发送器64可以集成在终端设备的收发信机中，也可以为终端设备上独立的收发天线。通信总线66用于实现元件之间的通信连接。上述通信端口67用于实现终端设备与其他外设之间进行连接通信。
在本申请中，上述存储器62用于存储计算机可执行程序代码，程序代码包括指令；当处理器61执行指令时，指令使AMF设备执行上述图6和图7所示的第一AMF设备侧的动作，其实现原理和技术效果类似，在此不再赘述。
图17为本申请提供的另一种终端设备的结构示意图。如图17所示，该终端设备可以包括：处理器71(例如CPU)、存储器72、接收器73、发送器74；接收器73和发送器74均耦合至处理器71，处理器71控制接收器73的接收动作、处理器71控制发送器74的发送动作；存储器72可能包含高速RAM存储器，也可能还包括非易失性存储器NVM，例如至少一个磁盘存储器，存储器72中可以存储各种指令，以用于完成各种处理功能以及实现本申请的方法步骤。可选的，本申请涉及的终端设备还可以包括：电源75、通信总线76以及通信端 口77。接收器73和发送器74可以集成在终端设备的收发信机中，也可以为终端设备上独立的收发天线。通信总线76用于实现元件之间的通信连接。上述通信端口77用于实现终端设备与其他外设之间进行连接通信。
在本申请中，上述存储器72用于存储计算机可执行程序代码，程序代码包括指令；当处理器71执行指令时，指令使终端设备执行上述图5至图10所示的终端设备侧的动作，其实现原理和技术效果类似，在此不再赘述。
图18为本申请提供的另一种终端设备的结构示意图。如图18所示，该终端设备可以包括：处理器81(例如CPU)、存储器82、接收器83、发送器84；接收器83和发送器84均耦合至处理器81，处理器81控制接收器83的接收动作、处理器81控制发送器84的发送动作；存储器82可能包含高速RAM存储器，也可能还包括非易失性存储器NVM，例如至少一个磁盘存储器，存储器82中可以存储各种指令，以用于完成各种处理功能以及实现本申请的方法步骤。可选的，本申请涉及的终端设备还可以包括：电源85、通信总线86以及通信端口87。接收器83和发送器84可以集成在终端设备的收发信机中，也可以为终端设备上独立的收发天线。通信总线86用于实现元件之间的通信连接。上述通信端口87用于实现终端设备与其他外设之间进行连接通信。
在本申请中，上述存储器82用于存储计算机可执行程序代码，程序代码包括指令；当处理器81执行指令时，指令使第三AMF设备执行上述图10所示的第三AMF设备侧的动作，其实现原理和技术效果类似，在此不再赘述。
正如上述实施例，本申请涉及的终端设备可以是手机、平板电脑等无线终端，因此，以终端设备为手机为例：图19为申请提供的终端设备为手机时的结构框图。参考图19，该手机可以包括：射频(Radio Frequency，RF)电路1110、存储器1120、输入单元1130、显示单元1140、传感器1150、音频电路1160、无线保真(wireless fidelity，WiFi)模块1170、处理器1180、以及电源1190等部件。本领域技术人员可以理解，图19中示出的手机结构并不构成对手机的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
下面结合图19对手机的各个构成部件进行具体的介绍：
RF电路1110可用于收发信息或通话过程中，信号的接收和发送，例如，将基站的下行信息接收后，给处理器1180处理；另外，将上行的数据发送给基站。通常，RF电路包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器(Low Noise Amplifier，LNA)、双工器等。此外，RF电路1110还可以通过无线通信与网络和其他设备通信。上述无线通信可以使用任一通信标准或协议，包括但不限于全球移动通讯系统(Global System of Mobile communication，GSM)、通用分组无线服务(General Packet Radio Service，GPRS)、码分多址(Code Division Multiple Access，CDMA)、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)、长期演进(Long Term Evolution,LTE))、电子邮件、短消息服务(Short Messaging Service，SMS)等。
存储器1120可用于存储软件程序以及模块，处理器1180通过运行存储在存储器1120的软件程序以及模块，从而执行手机的各种功能应用以及数据处理。存储器1120可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用 所创建的数据(比如音频数据、电话本等)等。此外，存储器1120可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
输入单元1130可用于接收输入的数字或字符信息，以及产生与手机的用户设置以及功能控制有关的键信号输入。具体地，输入单元1130可包括触控面板1131以及其他输入设备1132。触控面板1131，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板1131上或在触控面板1131附近的操作)，并根据预先设定的程式驱动相应的连接装置。可选的，触控面板1131可包括触摸检测装置和触摸控制器两个部分。其中，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器1180，并能接收处理器1180发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板1131。除了触控面板1131，输入单元1130还可以包括其他输入设备1132。具体地，其他输入设备1132可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆等中的一种或多种。
显示单元1140可用于显示由用户输入的信息或提供给用户的信息以及手机的各种菜单。显示单元1140可包括显示面板1141，可选的，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板1141。进一步的，触控面板1131可覆盖于显示面板1141之上，当触控面板1131检测到在其上或附近的触摸操作后，传送给处理器1180以确定触摸事件的类型，随后处理器1180根据触摸事件的类型在显示面板1141上提供相应的视觉输出。虽然在图10中，触控面板1131与显示面板1141是作为两个独立的部件来实现手机的输入和输入功能，但是在某些实施例中，可以将触控面板1131与显示面板1141集成而实现手机的输入和输出功能。
手机还可包括至少一种传感器1150，比如光传感器、运动传感器以及其他传感器。具体地，光传感器可包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示面板1141的亮度，光传感器可在手机移动到耳边时，关闭显示面板1141和/或背光。作为运动传感器的一种，加速度传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别手机姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；至于手机还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。
音频电路1160、扬声器1161以及传声器1162可提供用户与手机之间的音频接口。音频电路1160可将接收到的音频数据转换后的电信号，传输到扬声器1161，由扬声器1161转换为声音信号输出；另一方面，传声器1162将收集的声音信号转换为电信号，由音频电路1160接收后转换为音频数据，再将音频数据输出处理器1180处理后，经RF电路1110以发送给比如另一手机，或者将音频数据输出至存储器1120以便进一步处理。
WiFi属于短距离无线传输技术，手机通过WiFi模块1170可以帮助用户收发电子邮件、浏览网页和访问流式媒体等，它为用户提供了无线的宽带互联网访问。虽然图19示 出了WiFi模块1170，但是可以理解的是，其并不属于手机的必须构成，完全可以根据需要在不改变本申请的本质的范围内而省略。
处理器1180是手机的控制中心，利用各种接口和线路连接整个手机的各个部分，通过运行或执行存储在存储器1120内的软件程序和/或模块，以及调用存储在存储器1120内的数据，执行手机的各种功能和处理数据，从而对手机进行整体监控。可选的，处理器1180可包括一个或多个处理单元；例如，处理器1180可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器1180中。
手机还包括给各个部件供电的电源1190(比如电池)，可选的，电源可以通过电源管理系统与处理器1180逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
手机还可以包括摄像头1200，该摄像头可以为前置摄像头，也可以为后置摄像头。尽管未示出，手机还可以包括蓝牙模块、GPS模块等，在此不再赘述。
在本申请中，该手机所包括的处理器1180可以用于执行上述接入方法实施例，其实现原理和技术效果类似，在此不再赘述。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本发明实施例的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。

Claims (30)

  1. 一种接入方法，其特征在于，包括：
    网络设备获取第一信息，所述第一信息用于指示终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
    所述网络设备获取第二信息，所述第二信息用于指示接入和移动性管理功能AMF设备所连接的切片的SST，以及，所述AMF设备所连接的切片支持的RAT类型；
    所述网络设备根据所述第一信息和所述第二信息，选择服务所述终端设备的第一AMF设备。
  2. 根据权利要求1所述的方法，其特征在于，所述网络设备为接入网络节点设备，所述网络设备获取第一信息，包括：
    所述网络设备从所述终端设备获取第一网络切片选择辅助信息，所述第一网络切片选择辅助信息包括所述第一信息；或
    所述网络设备从第二AMF设备获取第二网络切片选择辅助信息，所述第二网络切片选择辅助信息包括所述第一信息。
  3. 根据权利要求2所述的方法，其特征在于，所述网络设备从所述终端设备获取所述第一网络切片选择辅助信息，包括：
    所述网络设备从所述终端设备接收第一请求消息，其中，所述第一请求消息携带所述第一网络切片选择辅助信息，所述第一网络切片选择辅助信息为配置的网络切片选择辅助信息或接受的网络切片选择辅助信息。
  4. 根据权利要求2所述的方法，其特征在于，所述第二网络切片选择辅助信息为接受的或网络切片选择辅助信息。
  5. 根据权利要求1至4任一所述的方法，其特征在于，所述网络设备获取第二信息，包括：
    所述网络设备从所述AMF设备获取所述第二信息；或
    所述网络设备从接入网络域管理设备获取所述第二信息。
  6. 根据权利要求1所述的方法，其特征在于，所述网络设备为第二AMF设备，所述网络设备获取第一信息，包括：
    所述网络设备从签约数据库获取所述终端设备的签约信息；
    所述网络设备根据所述终端设备的签约信息，确定所述第一信息。
  7. 根据权利要求6所述的方法，其特征在于，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
    或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
  8. 根据权利要求1至7任一所述的方法，其特征在于，所述网络设备根据所述第一信息和所述第二信息，选择服务所述终端设备的第一AMF设备，包括：
    所述网络设备匹配所述第一信息和所述第二信息，选择支持所述终端设备允许接入的SST，以及，接入所允许接入的SST时允许使用的RAT类型的AMF设备作为所述第一AMF设备。
  9. 一种接入方法，其特征在于，包括：
    接入和移动性管理功能AMF设备从接入网络节点设备接收终端设备发送的第一请求消息，所述第一请求消息携带所述终端设备的标识；
    所述AMF设备根据所述终端设备的标识信息，从签约数据库获取所述终端设备的标识对应的签约信息；
    所述AMF设备根据所述签约信息，确定所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
    所述AMF设备向所述终端设备发送第一接受消息，所述第一接受消息包括：所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
  10. 根据权利要求9所述的方法，其特征在于，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
    或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
  11. 根据权利要求9或10所述的方法，其特征在于，所述AMF设备向所述终端设备发送接受消息之后，所述方法还包括：
    所述AMF设备从接入网络节点设备接收所述终端设备发送的第二请求消息，所述第二请求消息用于指示所述终端设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型；
    所述AMF设备根据所述第二请求消息、所述AMF设备所连接的切片的SST、所述AMF设备所连接的切片支持的RAT类型，为所述终端设备选择提供服务的切片。
  12. 一种接入方法，其特征在于，包括：
    终端设备通过接入网络节点设备向接入和移动性管理功能AMF设备发送第一请求消息，所述第一请求消息携带所述终端设备的标识信息；
    所述终端设备通过所述接入网络节点设备接收所述AMF设备发送的第一接受消息，所述第一接受消息包括：所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型。
  13. 根据权利要求12所述的方法，其特征在于，所述第一请求消息，还包括：第一网络切片选择辅助信息；
    所述第一网络切片选择辅助信息为配置的网络切片选择辅助信息或接受的网络切片选择辅助信息。
  14. 一种接入方法，其特征在于，包括：
    接入和移动性管理功能AMF设备从接入网络节点设备接收终端设备发送的第一请求消息，所述第一请求消息携带终端设备的标识信息；
    所述AMF设备根据所述终端设备的标识信息，从签约数据库获取所述终端设备的签约信息；
    所述AMF设备根据所述终端设备的签约信息，确定所述第一信息，所述第一信息用于指示所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
    所述AMF设备根据所述第一信息、所述AMF设备所连接的切片的SST、所述AMF设备 所连接的切片支持的RAT类型，确定所述AMF设备是否能够为所述终端设备提供服务；
    若所述AMF设备无法为所述终端设备提供服务，所述AMF设备触发AMF设备重选操作。
  15. 根据权利要求14所述的方法，其特征在于，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
    或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
  16. 根据权利要求14或15所述的方法，其特征在于，所述AMF设备触发AMF设备重选操作，包括：
    所述AMF设备根据所述第一信息为终端设备重选AMF设备；或者
    所述AMF设备向第二AMF设备发送第三请求消息，所述第三请求消息用于指示所述第二AMF设备为所述终端设备重选AMF设备；或者，
    所述AMF设备向所述接入网络节点设备发送拒绝消息，所述拒绝消息用于指示所述接入网络节点设备为所述终端设备重选AMF设备。
  17. 一种网络设备，其特征在于，所述网络设备包括：
    第一获取模块，用于获取第一信息，所述第一信息用于指示终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
    第二获取模块，用于获取第二信息，所述第二信息用于指示接入和移动性管理功能AMF设备所连接的切片的SST，以及，所述AMF设备所连接的切片支持的RAT类型；
    选择模块，用于根据所述第一信息和所述第二信息，选择服务所述终端设备的第一AMF设备。
  18. 根据权利要求17所述的网络设备，其特征在于，所述网络设备为接入网络节点设备；
    所述第一获取模块，具体用于从所述终端设备获取第一网络切片选择辅助信息，所述第一网络切片选择辅助信息包括所述第一信息；或，从第二AMF设备获取第二网络切片选择辅助信息，所述第二网络切片选择辅助信息包括所述第一信息。
  19. 根据权利要求18所述的网络设备，其特征在于，
    所述第一获取模块，具体用于从所述终端设备接收第一请求消息，其中，所述第一请求消息携带所述第一网络切片选择辅助信息，所述第一网络切片选择辅助信息为配置的网络切片选择辅助信息或接受的网络切片选择辅助信息。
  20. 根据权利要求18所述的网络设备，其特征在于，所述第二网络切片选择辅助信息为接受的网络切片选择辅助信息。
  21. 根据权利要求17所述的网络设备，其特征在于，所述网络设备为第二AMF设备；
    所述第一获取模块，具体用于从签约数据库获取所述终端设备的签约信息，并根据所述终端设备的签约信息，确定所述第一信息。
  22. 根据权利要求21所述的网络设备，其特征在于，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
    或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接 入的切片时允许使用的RAT类型。
  23. 根据权利要求17-22任一所述的网络设备，其特征在于，
    所述选择模块，具体用于匹配所述第一信息和所述第二信息，选择支持所述终端设备允许接入的SST，以及，接入所允许接入的SST时允许使用的RAT类型的AMF设备作为所述第一AMF设备。
  24. 一种接入和移动性管理功能AMF设备，其特征在于，所述AMF设备包括：
    第一接收模块，用于从接入网络节点设备接收终端设备发送的第一请求消息，所述第一请求消息携带所述终端设备的标识；
    获取模块，用于根据所述终端设备的标识信息，从签约数据库获取所述终端设备的标识对应的签约信息；
    确定模块，用于根据所述签约信息，确定所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
    发送模块，用于向所述终端设备发送第一接受消息，所述第一接受消息包括：所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
  25. 根据权利要求24所述的AMF设备，其特征在于，所述签约信息包括所述终端设备签约的的切片的SST，以及，接入所述签约的切片时允许使用的RAT类型；
    或，所述签约信息包括所述终端设备允许接入的切片的SST，以及，接入所述允许接入的切片时允许使用的RAT类型。
  26. 根据权利要求24或25所述的AMF设备，其特征在于，所述AMF设备还包括：
    第二接收模块，用于在所述发送模块向所述终端设备发送接受消息之后，从接入网络节点设备接收所述终端设备发送的第二请求消息，所述第二请求消息用于指示所述终端设备待接入切片的SST，以及，接入待接入切片时使用的RAT类型；
    选择模块，用于根据所述第二请求消息、所述AMF设备所连接的切片的SST、所述AMF设备所连接的切片支持的RAT类型，为所述终端设备选择提供服务的切片。
  27. 一种终端设备，其特征在于，所述终端设备包括：
    发送模块，用于通过接入网络节点设备向接入和移动性管理功能AMF设备发送第一请求消息，所述第一请求消息携带所述终端设备的标识信息；
    接收模块，用于通过所述接入网络节点设备接收所述AMF设备发送的第一接受消息，所述第一接受消息包括：所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型。
  28. 根据权利要求27所述的终端设备，其特征在于，所述第一请求消息，还包括：第一网络切片选择辅助信息；
    所述第一网络切片选择辅助信息为配置的网络切片选择辅助信息或接受的网络切片选择辅助信息。
  29. 一种接入和移动性管理功能AMF设备，其特征在于，所述AMF设备包括：
    接收模块，用于从接入网络节点设备接收终端设备发送的第一请求消息，所述第一请求消息携带终端设备的标识信息；
    获取模块，用于根据所述终端设备的标识信息，从签约数据库获取所述终端设备的签约信息；
    第一确定模块，用于根据所述终端设备的签约信息，确定所述第一信息，所述第一信息用于指示所述终端设备允许接入的切片的切片/业务类型SST，以及，接入所述允许接入的切片时允许使用的无线接入技术RAT类型；
    第二确定模块，用于根据所述第一信息、所述AMF设备所连接的切片的SST、所述AMF设备所连接的切片支持的RAT类型，确定所述AMF设备是否能够为所述终端设备提供服务；
    触发模块，用于在所述AMF设备无法为所述终端设备提供服务时，触发AMF设备重选操作。
  30. 根据权利要求29所述的AMF设备，其特征在于，
    所述触发模块，具体用于根据所述第一信息为终端设备重选AMF设备；或者向第二AMF设备发送第三请求消息，所述第三请求消息用于指示所述第二AMF设备为所述终端设备重选AMF设备；或者，向所述接入网络节点设备发送拒绝消息，所述拒绝消息用于指示所述接入网络节点设备为所述终端设备重选AMF设备。
PCT/CN2017/079236 2017-04-01 2017-04-01 接入方法、网络设备、终端设备和amf设备 WO2018176442A1 (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP17903737.9A EP3589027A4 (en) 2017-04-01 2017-04-01 ACCESS METHOD, NETWORK DEVICE, TERMINAL DEVICE AND AMF DEVICE
CN201780057158.4A CN109716826B (zh) 2017-04-01 2017-04-01 接入方法、网络设备、终端设备和amf设备
PCT/CN2017/079236 WO2018176442A1 (zh) 2017-04-01 2017-04-01 接入方法、网络设备、终端设备和amf设备
BR112019019864A BR112019019864A2 (pt) 2017-04-01 2017-04-01 método de acesso, dispositivo de rede, dispositivo terminal, e dispositivo de função de gerenciamento de acesso e mobilidade amf
US16/588,279 US10979887B2 (en) 2017-04-01 2019-09-30 Access method, network device, terminal device, and AMF device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/079236 WO2018176442A1 (zh) 2017-04-01 2017-04-01 接入方法、网络设备、终端设备和amf设备

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/588,279 Continuation US10979887B2 (en) 2017-04-01 2019-09-30 Access method, network device, terminal device, and AMF device

Publications (1)

Publication Number Publication Date
WO2018176442A1 true WO2018176442A1 (zh) 2018-10-04

Family

ID=63674034

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/079236 WO2018176442A1 (zh) 2017-04-01 2017-04-01 接入方法、网络设备、终端设备和amf设备

Country Status (5)

Country Link
US (1) US10979887B2 (zh)
EP (1) EP3589027A4 (zh)
CN (1) CN109716826B (zh)
BR (1) BR112019019864A2 (zh)
WO (1) WO2018176442A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112105034A (zh) * 2019-06-17 2020-12-18 华为技术有限公司 通信的方法和通信装置
CN113676927A (zh) * 2020-05-15 2021-11-19 华为技术有限公司 一种通信的方法及装置
WO2023143465A1 (zh) * 2022-01-28 2023-08-03 华为技术有限公司 一种接入网设备选择方法和装置
WO2023217037A1 (zh) * 2022-05-10 2023-11-16 维沃移动通信有限公司 网元选择方法、能力指示方法及装置

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3494724B1 (en) * 2016-08-03 2024-06-05 Telefonaktiebolaget LM Ericsson (PUBL) Radio node, wireless device, methods performed therein and related products
US10433177B2 (en) * 2017-12-01 2019-10-01 At&T Intellectual Property I, L.P. Adaptive pairing of a radio access network slice to a core network slice based on device information or service information
US10986506B2 (en) * 2018-02-16 2021-04-20 Lenovo (Singapore) Pte. Ltd. Network slice selection assistance information configuration
US11197200B2 (en) * 2019-07-12 2021-12-07 Verizon Patent And Licensing Inc. Radio slice controller to support network slicing and quality of service
CN114270900B (zh) * 2019-08-19 2023-03-10 中兴通讯股份有限公司 通过接入和移动性管理功能重新分配进行注册的方法及计算机可读介质
US11197176B2 (en) * 2019-11-06 2021-12-07 Oracle International Corporation Methods, systems, and computer readable media for providing for policy-based access and mobility management function (AMF) selection using network slice selection assistance information (NSSAI) availability information
US11405931B2 (en) 2019-12-12 2022-08-02 Oracle International Corporation Methods, systems, and computer readable media for providing for network slice management using feedback mechanism
US11026149B1 (en) * 2020-01-31 2021-06-01 Dish Wireless Llc Systems and methods for reducing slice access failures
US11716283B2 (en) 2021-03-05 2023-08-01 Oracle International Corporation Methods, systems, and computer readable media for selecting a software defined wide area network (SD-WAN) link using network slice information
CN115967997A (zh) * 2021-10-11 2023-04-14 中国移动通信有限公司研究院 信息处理方法、装置、设备及可读存储介质
CN115460607A (zh) * 2022-08-22 2022-12-09 西安电子科技大学 一种异构蜂窝网络中ran切片的无线网络接入方法
JP7442708B1 (ja) 2023-03-09 2024-03-04 Kddi株式会社 制御装置、制御方法及びプログラム

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105101345A (zh) * 2014-05-09 2015-11-25 电信科学技术研究院 一种小区选择及其控制方法及装置
CN105813195A (zh) * 2016-05-13 2016-07-27 电信科学技术研究院 一种按需为终端选择移动性管理机制的方法及装置
US20170086118A1 (en) * 2015-09-18 2017-03-23 Huawei Technologies Co., Ltd. System and Methods for Network Slice Reselection

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017113109A1 (en) * 2015-12-29 2017-07-06 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for virtualized network service provision
US9961713B2 (en) * 2016-02-23 2018-05-01 Motorola Mobility Llc Procedures to support network slicing in a wireless communication system
US10925002B2 (en) * 2016-04-01 2021-02-16 Sony Corporation Terminal device, infrastructure equipment, wireless telecommunications network, methods and intergrated circuitry
CN106549806B (zh) * 2016-10-26 2019-06-18 清华大学 一种网络切片管理器及其管理方法
CN106412905A (zh) * 2016-12-12 2017-02-15 中国联合网络通信集团有限公司 网络切片选择方法、ue、mme和系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105101345A (zh) * 2014-05-09 2015-11-25 电信科学技术研究院 一种小区选择及其控制方法及装置
US20170086118A1 (en) * 2015-09-18 2017-03-23 Huawei Technologies Co., Ltd. System and Methods for Network Slice Reselection
CN105813195A (zh) * 2016-05-13 2016-07-27 电信科学技术研究院 一种按需为终端选择移动性管理机制的方法及装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Procedures for the 5G System; Stage 2(Release 15", 3GPP TS 23. 502 V0. 2. 0, 28 February 2017 (2017-02-28), XP051230766 *
"3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; System Architecture for the 5G System; Stage 2 (Release 15", 3GPP TS 23. 501 V0. 3. 1, 31 March 2017 (2017-03-31), XP055554863 *
See also references of EP3589027A4 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112105034A (zh) * 2019-06-17 2020-12-18 华为技术有限公司 通信的方法和通信装置
CN113676927A (zh) * 2020-05-15 2021-11-19 华为技术有限公司 一种通信的方法及装置
CN113676927B (zh) * 2020-05-15 2023-08-22 华为技术有限公司 一种通信的方法及装置
WO2023143465A1 (zh) * 2022-01-28 2023-08-03 华为技术有限公司 一种接入网设备选择方法和装置
WO2023217037A1 (zh) * 2022-05-10 2023-11-16 维沃移动通信有限公司 网元选择方法、能力指示方法及装置

Also Published As

Publication number Publication date
US20200029200A1 (en) 2020-01-23
EP3589027A1 (en) 2020-01-01
CN109716826A (zh) 2019-05-03
BR112019019864A2 (pt) 2020-04-22
US10979887B2 (en) 2021-04-13
CN109716826B (zh) 2021-04-09
EP3589027A4 (en) 2020-03-11

Similar Documents

Publication Publication Date Title
WO2018176442A1 (zh) 接入方法、网络设备、终端设备和amf设备
WO2020140935A1 (zh) 信息上报方法及终端
WO2019137337A1 (zh) 小区选择方法、终端及网络设备
WO2020001530A1 (zh) 测量方法、终端和网络侧设备
US11224027B2 (en) Cell registration method and device
WO2019014892A1 (zh) 测量配置方法及相关产品
WO2020020058A1 (zh) 测量方法、终端和网络侧设备
WO2018228517A1 (zh) 一种接入控制的方法、网络设备以及终端设备
WO2018082435A1 (zh) 终端设备移动性的处理方法、终端设备和基站
WO2019011324A1 (zh) 确定移动终端接入方式的方法、存储介质及移动终端
CN112788783B (zh) 一种中继连接建立方法及设备
JP7457703B2 (ja) 測定指示方法、装置及びシステム
WO2020199919A1 (zh) 上报方法、配置方法、终端和网络设备
WO2020147822A1 (zh) 连接管理方法、终端及网络侧设备
CN111800794B (zh) 解调参考信号位置的确定方法及设备
WO2020038194A1 (zh) 解调参考信号天线端口映射方法、终端设备及网络设备
WO2019242678A1 (zh) 测量方法及终端
US20220322051A1 (en) Multicast service processing method, multicast service configuration method, and communications device
US20210314897A1 (en) Time lnformation Obtaining Method and Transmission Method, Terminal, and Network Device
WO2018119789A1 (zh) 一种连接接入点的方法及终端、管理服务器
CN109714800B (zh) 信息查询方法、用户设备、服务器及存储介质
WO2021018282A1 (zh) 网络切换方法、网络设备及终端
WO2020221125A1 (zh) 配置信息获取、发送方法、终端及网络侧设备
CN110324892B (zh) 一种跟踪区更新方法及设备
JP2022552327A (ja) ハンドオーバ方法、構成方法、端末及びネットワーク機器

Legal Events

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

Ref document number: 17903737

Country of ref document: EP

Kind code of ref document: A1

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112019019864

Country of ref document: BR

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2017903737

Country of ref document: EP

Effective date: 20190924

ENP Entry into the national phase

Ref document number: 112019019864

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20190923