WO2019196535A1 - 通信方法、装置和系统 - Google Patents

通信方法、装置和系统 Download PDF

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Publication number
WO2019196535A1
WO2019196535A1 PCT/CN2019/072478 CN2019072478W WO2019196535A1 WO 2019196535 A1 WO2019196535 A1 WO 2019196535A1 CN 2019072478 W CN2019072478 W CN 2019072478W WO 2019196535 A1 WO2019196535 A1 WO 2019196535A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
network
slice selection
configuration
network slice
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/072478
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English (en)
French (fr)
Inventor
余芳
李岩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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
Priority claimed from CN201810483383.0A external-priority patent/CN110366241B/zh
Priority to CN201980023402.4A priority Critical patent/CN112314002B/zh
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to SG11202009776QA priority patent/SG11202009776QA/en
Priority to BR112020020742-0A priority patent/BR112020020742A2/pt
Priority to KR1020207031151A priority patent/KR102400285B1/ko
Priority to JP2020555113A priority patent/JP7083404B2/ja
Priority to MX2020010588A priority patent/MX2020010588A/es
Priority to AU2019250727A priority patent/AU2019250727B2/en
Priority to EP21196497.8A priority patent/EP4002924B1/en
Priority to EP19761722.8A priority patent/EP3582555B1/en
Priority to US16/456,936 priority patent/US10827360B2/en
Publication of WO2019196535A1 publication Critical patent/WO2019196535A1/zh
Anticipated expiration legal-status Critical
Priority to US17/074,909 priority patent/US11516677B2/en
Ceased legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W60/00Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/18Selecting a network or a communication service
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W60/00Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events

Definitions

  • the present application relates to the field of communication technologies, and more particularly, to a communication method, apparatus, and system.
  • the application scenarios of different devices may be different. Different types of application scenarios have different requirements for the function and performance of the network, and the integration and optimization of the traditional human-centered single network cannot meet the demand. At the same time, the optimization and demand differences of different scenarios may be large. For example, some scenarios require services with ultra-low latency and high reliability. Other scenarios require massive connections but services with small data volume, and some scenarios require High bandwidth, large data volume services. If a private network is built in each scenario, the cost of network construction and operation of operators will increase, resulting in waste of resources. Therefore, the concept of network slicing has emerged.
  • the network segmentation allows the operator to provide a separate and independent network environment for different types of application scenarios on the same network infrastructure. This allows different types of application scenarios to customize network functions and features according to their respective requirements. Guarantee the needs of different businesses.
  • the terminal device stores a configured Configured Network Slicing Selection Assistance Information (Configured NSSAI) for each Public Land Mobile Network (PLMN).
  • Configured NSSAI Configured Network Slicing Selection Assistance Information
  • the terminal device registers with the network, the selection process of the network slice is triggered. For example, the terminal device selects the network slice selection assistance information (Requested NSSAI) of the assistance information generation request according to the network slice of the configuration of the PLMN that is requested to be registered or has been registered, and sends the requested network slice selection assistance information to the network device. .
  • the network device feeds back the allowed network slice selection assistance information (Allowed NSSAI) to the terminal device.
  • the radio access network device (RAN) accessed by the terminal device can use the allowed network slice selection auxiliary information to perform a network slice selection process.
  • the configured network slice selection assistance information of the PLMN may be updated, or the configured network slice selection assistance information saved by the terminal device is different from the configured network slice assistance information of the public land mobile network where the terminal device is located.
  • the network device may not be able to send the updated configured network slice selection assistance information to the terminal device.
  • the network slice corresponding to the requested network slice selection assistance information determined by the terminal device may be inconsistent with the network slice that the network device can provide, which may cause the terminal device not to request the network slice that can be used, thereby reducing the user experience. It may also cause the terminal device to request the use of unavailable network slices, wasting signaling interaction. Therefore, how to ensure that the network device can send the updated configured network slice selection auxiliary information to the terminal device is an urgent problem to be solved.
  • the application provides a communication method, apparatus and system.
  • the present application provides a communication method, including: an access and mobility management function network element in a first public land mobile network receives a registration request message from a terminal device; and when it is determined that the first condition is met, The configured network slice selection assistance information of the first public land mobile network is transmitted to the terminal device.
  • the first condition includes any one of the following: the registration request message is an initial registration request message, or the registration request message is sent after the terminal device moves from the second public land mobile network to the first public land mobile network.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device. It also saves network resources.
  • the first condition further includes: the access and mobility management function network element acquiring the subscription information of the terminal device from the unified data management network element. Therefore, when the terminal device is repeatedly registered to the AMF in a short time, the AMF repeatedly sends the network slice selection assistance information of the configuration of the first PLMN to the terminal device, thereby further avoiding waste of network signaling. Save network resources.
  • the present application provides a communication method, including: a unified data management network element receiving a subscription information acquisition request of a terminal device from a first access and mobility management function network element in a first public land mobile network.
  • the first access and mobility management function network element is an access and mobility management function network element that provides services for the terminal device.
  • the unified data management network element sends the subscription information of the terminal device to the first access and mobility management function network element.
  • the subscription information of the terminal device includes at least the subscription network slice selection assistance information of the terminal device.
  • the unified data management network element instructs the first access and mobility management function network element to initiate update of the network configuration selection assistance information of the first configuration.
  • the network slice selection assistance information of the first configuration is the network slice selection assistance information of the configuration of the first public land mobile network of the terminal device.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device. It also saves network resources.
  • the unified data management network element instructs the first access and mobility management function network element to initiate the update of the network slice selection assistance information of the first configuration, including: the unified data management network element to the first access And the mobility management function network element sends the first indication information, where the first indication information is used to indicate that the first access and mobility management function network element initiates the update of the network configuration selection assistance information of the first configuration.
  • the unified data management network element sends a subscription modification notification message of the terminal device to the first access and mobility management function network element, and the subscription modification notification message of the terminal device includes the subscription network slice selection assistance information of the terminal device.
  • the method further includes: the unified data management network element sends a subscription request to the first access and mobility management function network element, and the subscription request is used to request the first access and mobility management function network element.
  • the notification message is sent to the unified data management network element; the unified data management network element receives the notification message from the first access and mobility management function network element. Therefore, it can be ensured that the indication identifier of the PLMN maintained by the UDM is the same as the actual update result of the network slice selection assistance information of the configuration of the PLMN of the terminal device.
  • the unified data management network element determines that the initiation does not need to be initiated.
  • a configured network slice selects an update of the auxiliary information.
  • the unified data management network element determines that the network slice selection assistance information of the first configuration does not need to be initiated.
  • the method further includes: determining, by the unified data management network element, The configured network slice selection assistance information for one or more public land mobile networks of the terminal needs to be updated, and the one or more public land mobile networks include the first public land mobile network. For example, if the unified data management network element determines that the subscription information of the terminal changes, the network slice selection assistance information that determines the configuration of one or more public land mobile networks of the terminal needs to be updated.
  • the present application provides a communication method, including: a first access and mobility management function network element in a first public land mobile network sends a subscription information acquisition request of a terminal device to a unified data management network element, where
  • the first access and mobility management function network element is an access and mobility management function network element that provides services for the terminal device; the first access and mobility management function network element receives the terminal device from the unified data management network element.
  • the subscription information, the subscription information of the terminal device includes at least the subscription network slice selection assistance information of the terminal device; the first access and mobility management function network element initiates the first configured network slice selection auxiliary information according to the indication of the unified data management network element.
  • the updating, wherein the first configured network slice selection assistance information is the network slice selection assistance information of the configuration of the first public land mobile network of the terminal device.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device. It also saves network resources.
  • the first access and mobility management function network element initiates the update of the first configured network slice selection assistance information according to the indication of the unified data management network element, including: first access and mobility management.
  • the function network element when receiving the first indication information from the unified data management network element, initiates update of the first configured network slice selection auxiliary information based on the subscription network slice selection auxiliary information.
  • the first access and mobility management function network element receives the subscription modification notification message of the terminal device from the unified data management network element, the subscription network slice selection of the terminal device included in the subscription modification notification message included in the terminal device
  • the auxiliary information initiates the update of the network slice selection auxiliary information of the first configuration.
  • the method includes: the first access and mobility management function network element receives a subscription request from the unified data management network element, and the subscription request is used to request the first access and mobility management function network element in the first After the configuration of the network slice selection auxiliary information is completed, the notification message is sent to the unified data management network element; after receiving the configuration update completion message from the terminal device, the first access and mobility management function network element sends the configuration data to the unified data management network element. And sending a notification message, where the configuration update completion message is used to instruct the terminal device to complete the update of the network slice selection assistance information of the first configuration. Therefore, it can be ensured that the indication identifier of the PLMN maintained by the UDM is the same as the actual update result of the network slice selection assistance information of the configuration of the PLMN of the terminal device.
  • the present application provides a communication method, including: accessing and mobility management function network element acquiring subscription network slice selection auxiliary information of a terminal device; acquiring network slice selection auxiliary information of a first configuration of the terminal device, a configured network slice selection auxiliary information is configured for the network slice selection auxiliary information of the configuration of the first public land mobile network that the terminal device requests to register; and determining, according to the contracted network slice selection auxiliary information, whether the network slice selection auxiliary information of the first configuration needs to be updated; If the access and mobility management function network element determines that the network slice selection assistance information of the first configuration needs to be updated, determining network slice selection assistance information of the second configuration based on the subscription network slice selection assistance information, and selecting the network slice of the second configuration The auxiliary information is sent to the terminal device.
  • the access and mobility management function network element acquires the network slice selection assistance information of the first configuration of the terminal device, including: the access and mobility management function network element receives the registration request message from the terminal device,
  • the registration request message includes network slice selection assistance information of the first configuration.
  • the registration request message is an initial registration request message, or the registration request message is sent after the terminal device moves from the second public land mobile network to the first public land mobile network.
  • the access and mobility management function network element obtains the context of the terminal device, and the context of the terminal device includes the first configured network slice selection assistance information.
  • the access and mobility management function network element determines, according to the subscription network slice selection assistance information, whether to initiate the update of the first configured network slice selection assistance information, including: access and mobility management function network. Determining whether the network slice selection assistance information of the first configuration is the same as the subscription network slice selection assistance information. If the network slice selection assistance information of the first configuration is different from the subscription network slice selection assistance information, determining the network slice selection of the first configuration.
  • the auxiliary information needs to be updated to the network configuration selection assistance information of the second configuration; wherein the network slice selection assistance information of the second configuration includes the same single network slice selection assistance information and the subscription network slice selection assistance information.
  • the network configuration selection assistance information of the first configuration is selected as the network slice selection assistance information of the visited public land network of the terminal device, and the access and mobility management function network element is selected according to the subscription network slice selection. Determining whether the first configuration of the network slice selection auxiliary information needs to be updated, including: the access and mobility management function network element is based on the first configured network slice selection auxiliary information, the first configured network slice selection auxiliary information, and the terminal device The mapping relationship of the configured network slice selection auxiliary information belonging to the public land network, and the contracted network slice selection auxiliary information, determining whether the first configured network slice selection auxiliary information needs to be updated.
  • the method further includes: the access and mobility management function network element saves the second configured network slice selection auxiliary information in a context of the terminal device. In this way, when the terminal device registers with other AMFs, other AMFs can directly obtain the network slice selection assistance information of the second configuration from the context of the terminal device.
  • the application provides a communication method, including: the terminal device sends a registration request message to the access and mobility management function network element, where the registration request message includes the network configuration selection auxiliary information of the first configuration of the terminal device, A configured network slice selection assistance information is used for the network slice selection assistance information of the configuration of the first public land mobile network that the terminal device requests to register; and the network slice selection assistance information of the second configuration of the first public land mobile network is acquired.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device. It also saves network resources.
  • the registration request message is an initial registration request message, or the registration request message is sent after the terminal device moves from the second public land mobile network to the first public land mobile network.
  • the application provides a communication method, including: receiving, by a terminal device, an updated user routing policy; determining that the update indication information is not sent to the access and mobility management function network element; to the access and mobility The management function network element sends update indication information, where the update indication information is used to indicate that the access and mobility management function network element sends updated configuration network slice selection assistance information to the terminal device, where the access and mobility management function network
  • the element is located in the visited public land mobile network; the record has sent the update indication information to the visited PLMN.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device. It also saves network resources.
  • the embodiment of the present application further provides a communication method, including: accessing and mobility management function of a first network, acquiring a first configuration network slice selection auxiliary information of a terminal device associated with the first network; The terminal device sends the first configuration network slice selection assistance information and the indication information, where the indication information is used to instruct the terminal device to delete the second configuration network slice selection assistance information associated with the network other than the first network.
  • the terminal device when the terminal device registers with the other network next time, the terminal device does not store the requested network slice selection auxiliary information in the registration request because the terminal device does not store the configured network slice selection auxiliary information corresponding to the network, so the network side
  • the terminal device is provided with a configuration network slice selection auxiliary information of the network according to the current subscription information of the terminal device. Therefore, the configuration network slice selection auxiliary information of the network can be updated in time, thereby improving the user experience of the terminal device and saving network resources.
  • the indication information is also used to instruct the terminal device to delete the allowed network slice selection assistance information associated with other networks. Therefore, when the terminal device registers to another network next time, since the terminal device does not store the allowed network slice selection assistance information corresponding to the network, the terminal device cannot determine the requested network slice selection assistance according to the allowed network slice selection assistance information.
  • the information does not carry the requested network slice selection auxiliary information in the registration request, so the network side provides the terminal device with a configuration network slice selection auxiliary information of the network according to the current subscription information of the terminal device. Therefore, it is further ensured that the configuration network slice selection auxiliary information of the network can be updated in time.
  • the access and mobility management function network element of the first network acquires the first configuration network slice selection assistance information of the terminal device associated with the first network, including: access and mobility management function network.
  • the element receives the updated subscription network slice selection assistance information of the terminal device associated with the first network from the data management network element; and selects the first configuration network slice selection assistance information according to the updated subscription network slice selection auxiliary information.
  • the access and mobility management function network element determines that the first configuration network slice selection assistance information is obtained based on the updated subscription network slice selection assistance information, and sends the indication information to the terminal device. That is to say, the method is applicable to a scenario in which the subscription data modification of the terminal data causes the configuration NSSAI of the terminal device of the current PLMN to change.
  • the access and mobility management function network element sends the first configuration network slice selection assistance information and the indication information to the terminal device, including: the access and mobility management function network element sends the user equipment to the terminal device.
  • Configuring an update command, the user equipment configuration update command includes a first configuration network slice selection auxiliary information and indication information; or, the access and mobility management function network element sends a registration accept message to the terminal device, where the registration accept message includes the first configuration network slice Select auxiliary information and instructions.
  • the embodiment of the present application further provides a communication method, including: receiving, by a terminal device, a first configuration network slice selection auxiliary information of a terminal device corresponding to the first network from an access and mobility management function network element of the first network And deleting second configuration network slice selection assistance information associated with other networks than the first network; replacing the stored third configuration network slice selection assistance information associated with the first network with the first configuration network slice selection assistance information.
  • the terminal device deletes the second configuration network slice selection assistance information associated with the other network except the first network, when the terminal device registers with the other network next time, the terminal device does not store the configuration network corresponding to the network.
  • the slice selection auxiliary information the terminal device does not carry the requested network slice selection auxiliary information in the registration request, so the network side provides the terminal device with a configuration network slice selection auxiliary information of the network device according to the current subscription information of the terminal device. . Therefore, the configuration network slice selection auxiliary information of the network can be updated in time, thereby improving the user experience of the terminal device and saving network resources.
  • the method further includes: the terminal device receiving the indication information from the access and mobility management function network element, where the indication information is used to instruct the terminal device to delete the second configuration network slice selection auxiliary information.
  • the method further includes the terminal device deleting the allowed network slice selection assistance information associated with the other network.
  • the terminal device receives the indication information from the access and mobility management function network element, where the indication information is used to instruct the terminal device to delete the second configuration network slice selection assistance information and allow the network slice selection assistance information. Therefore, when the terminal device registers to another network next time, since the terminal device does not store the allowed network slice selection assistance information corresponding to the network, the terminal device cannot determine the requested network slice selection assistance according to the allowed network slice selection assistance information.
  • the information does not carry the requested network slice selection auxiliary information in the registration request, so the network side provides the terminal device with a configuration network slice selection auxiliary information of the network according to the current subscription information of the terminal device. Therefore, it is further ensured that the configuration network slice selection auxiliary information of the network can be updated in time.
  • the embodiment of the present application further provides a communication device, where the communication device includes a unit for implementing the first aspect or any possible implementation manner of the first aspect, or includes the second aspect or the A unit of any one of the possible implementations of the second aspect, or a unit for implementing any of the possible implementations of the third or third aspect, or comprising any of the fourth or fourth aspects A unit of a possible implementation, or a unit for implementing any of the possible implementations of the fifth or fifth aspect, or comprising any of the possibilities for implementing the sixth or sixth aspect A unit of implementation, or a unit for implementing any of the possible implementations of the seventh or seventh aspect, or comprising any of the possible implementations for implementing the eighth or eighth aspect unit.
  • an embodiment of the present application provides a communication apparatus, where the communication apparatus includes: a memory for storing a program; a processor, configured to execute the program stored by the memory, when the program is executed, where The method of any one of the possible implementations of the first aspect or the first aspect, or the method of any one of the possible implementations of the second aspect or the second aspect, or Method for performing any one of the possible implementations of the third aspect or the third aspect, or the method for performing any one of the possible implementations of the fourth or fourth aspect, or for The method of any one of the possible implementations of the fifth or fifth aspect, or the method for performing any one of the possible implementations of the sixth or sixth aspect, or for performing The method of any one of the possible implementations of the seventh aspect or the seventh aspect, or the method of any one of the possible implementations of the eighth or eighth aspect.
  • the switching device is a chip or an integrated circuit.
  • the embodiment of the present application provides a computer readable storage medium, where the computer readable storage medium stores instructions, when the instructions are run on a computer, causing the computer to perform the foregoing aspects. method.
  • the embodiment of the present application provides a computer program product comprising instructions, when the computer program product is run on a computer, causing the computer to perform the method described in the above aspects.
  • Figure 1 is a block diagram of a system.
  • FIG. 2 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • 8A to 8H are respectively schematic structural diagrams of a communication device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a communication apparatus according to an embodiment of the present application.
  • FIG. 10 is a schematic flowchart of still another communication method according to an embodiment of the present application.
  • FIG. 11 is a schematic flowchart of still another communication method according to an embodiment of the present application.
  • FIG. 12 is a schematic flowchart of still another communication method according to an embodiment of the present application.
  • FIG. 13 is a schematic flowchart of still another communication method according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the terminal device in the embodiment of the present application may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or User device.
  • the terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), with wireless communication.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • PLMN Public Land Mobile Network
  • the selection process of the network slice is triggered.
  • the selection process of the network slice depends on the user's subscription data, local configuration information, roaming agreement, operator's policy, and so on.
  • the above parameters can be comprehensively considered to select the optimal network slice type for the terminal device.
  • the third generation partnership project (3 rd Generation Partnership Project, 3GPP ) defines several different networks slice selection auxiliary information (Network Slice Selection Assistance information, NSSAI ).
  • the terminal device may provide a Requested NSSAI to the core network, and the core network selects a network slice instance for the terminal device.
  • the terminal device can provide an NSSAI consisting of a set of parameters to the network, and select a network slice instance for the terminal device.
  • the NSSAI can be a standardized value or a specific value within the PLMN.
  • the NSSAI may be a collection of Single Network Slice Selection Assistance Information (S-NSSAI), and each S-NSSAI is used to identify a network slice type.
  • the terminal device can store Configured NSSAI and/or Allowed NSSAI under each PLMN. Configured NSSAI is configured in the terminal device before the terminal device interacts with the PLMN.
  • Configured NSSAI is used to construct the Requested NSSAI that the terminal device needs to use when initially entering the network in the PLMN.
  • the network side determines the appropriate network slice type and Access and Mobility Management Function (AMF) for the terminal device based on the Requested NSSAI.
  • AMF Access and Mobility Management Function
  • the subscription network slice selection auxiliary information of the terminal device is referred to as the Subscribed S-NSSAIs of the terminal device, and includes one or more subscribed single network slice selection auxiliary information (Subscribed S-NSSAI).
  • Subscribed S-NSSAIs of the terminal device changes, the Configured NSSAI of each PLMN of the terminal device may be triggered to be updated.
  • FIG. 1 is a block diagram of a system.
  • the system 100 shown in FIG. 1 includes a terminal device 110, an Access and Mobility Management Function (AMF) network element 120, and a Unified Data Management (UDM) network element 130.
  • AMF Access and Mobility Management Function
  • UDM Unified Data Management
  • the access and mobility management function network element 120 is responsible for mobility management of the terminal device.
  • the mobility management function 120 can manage the user's mobile status and assign a user temporary identity.
  • the mobility management function 120 can also authenticate and authorize users.
  • the unified data management network element 130 is responsible for managing the subscription data of the terminal device. When the subscription data is modified, the unified data management 130 is responsible for notifying the corresponding network element.
  • Access and mobility management functions and unified data management can be implemented by specified hardware, or by software instances on specified hardware, or by virtual functions instantiated on a suitable platform.
  • the invention is not limited thereto.
  • AMF is used as an abbreviation of access and mobility management function network element
  • UDM is used as an abbreviation of unified data management network element.
  • FIG. 1 only shows the network elements in the system related to the technical solution of the present application.
  • RAN Radio Access Network
  • SMF Session Management Function
  • FIG. 2 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the AMF in the first Public Land Mobile Network receives a registration request message from the terminal device.
  • the AMF is the service AMF of the terminal device.
  • the AMF receives a registration request message of the terminal device forwarded by the RAN device.
  • the AMF sends the configured network slice selection assistance information (Configured NSSAI) of the first PLMN to the terminal device, where the first condition is met, wherein the first condition includes any one of the following: the registration request
  • the message is an initial registration request message, or the registration request message is sent after the terminal device moves from the second PLMN to the first PLMN.
  • the terminal device when the terminal device is powered on or re-registered to the network after registration, the terminal device sends an initial registration request message to the AMF requesting registration to the network.
  • the initial registration request message may be a registration request message whose registration type is initial registration.
  • the AMF may determine, according to the 5G Globally Unique Temporary Identifier (5G GUTI) carried in the registration request message sent by the terminal device, that the terminal device moves from the second PLMN to the first PLMN.
  • the 5G GUTI includes a Mobile Country Code (MCC) and a Mobile Network Code (MNC), and the MCC and the MNC form a PLMN ID, and the AMF can obtain the PLMN ID from the 5G GUTI.
  • the PLMN ID is the PLMN ID of the PLMN where the last AMF serving the UE is located.
  • the condition for transmitting the configured network slice selection assistance information of the first PLMN to the terminal device may also be understood as: the registration type carried in the registration request message is a mobility registration update.
  • the terminal device changes in the subscribed S-NSSAIs of the terminal device in the RM-DEREGISTERED state, and the change of the subscribed S-NSSAIs of the terminal device may cause the PLMN of the terminal device.
  • the Configured NSSAI changes. Because the terminal is in the de-registered state, the 5G core network cannot send the updated Configured NSSAI of each PLMN to the terminal, and the Configured NSSAI of each PLMN currently saved by the terminal cannot be updated in time (hereinafter referred to as scenario 1). Using the method shown in FIG.
  • the AMF in the first PLMN sends the configured network slice selection assistance information of the first PLMN as long as the registration type sent by the terminal device to the AMF in the first PLMN is initial registration.
  • the AMF can send the Configured NSSAI of the first PLMN to the terminal device in time. Therefore, the terminal device can obtain the Configured NSSAI of the first PLMN update in time, and then use the updated Configured NSSAI to determine the Requested NSSAI when the first PLMN is accessed, and provide the core network for the selection of the network slice.
  • the subscribed S-NSSAIs of the terminal device include S-NSSAI 1, S-NSSAI2, S-NSSAI 4, because S-NSSAI 1, S-NSSAI 2, S-NSSAI are deployed in the first PLMN. 3 corresponding network slice, so the Configured NSSAI of the terminal device in the first PLMN includes S-NSSAI 1, S-NSSAI2.
  • the changed Subscribed S-NSSAIs include S-NSSAI 1, S-NSSAI 2, S-NSSAI 3.
  • the Configured NSSAI of the terminal device in the first PLMN cannot be updated in time, so the network slice corresponding to the S-NSSAI 3 cannot be used.
  • the Configured NSSAI of the first PLMN used by the terminal device can be updated in time.
  • the updated First PLMN's Configured NSSAI includes S-NSSAI 1, S-NSSAI 2, S-NSSAI 3. Therefore, the terminal device can use the network slice corresponding to the S-NSSAI 3, thereby improving the user experience.
  • the changed Subscribed S-NSSAIs include S-NSSAI 1, S-NSSAI 4.
  • the terminal device Configured NSSAI cannot obtain timely update. Therefore, the network slice corresponding to the S-NSSAI 2 may be requested in the first PLMN, resulting in waste of network signaling.
  • the Configured NSSAI of the first PLMN used by the terminal device can be updated in time. For example, the updated First PLMN's Configured NSSAI includes S-NSSAI 1. Therefore, the terminal device does not request to use the network slice corresponding to the S-NSSAI 2, thereby avoiding waste of network signaling and saving network resources.
  • the terminal device moves from the second PLMN to the first PLMN. If the terminal device resides in the second PLMN, the Subscribed S-NSSAIs included in the terminal device subscription information changes, and the change of the subscription S-NSSAIs of the terminal device may result in the configuration of the PLMN of the terminal device. NSSAI changes. However, since the terminal device resides in the second PLMN, the AMF only sends the Configured NSSAI of the second PLMN to the terminal device, and does not send the Configured NSSAI of the first PLMN of the terminal device (Scenario 2 for short). With the method shown in FIG.
  • the AMF may update the updated first PLMN as long as the registration type of the terminal device is a mobility registration update and the terminal device moves from the second PLMN to the first PLMN.
  • Configured NSSAI is sent to the terminal device.
  • the method shown in FIG. 2 can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device and saving network resources.
  • the first condition further includes the AMF acquiring the subscription information of the terminal device from the UDM.
  • the UDM may be a UDM within the home PLMN (Home PLMN, HPLMN) of the terminal device.
  • the subscription information of the terminal device may include the Subscribed S-NSSAIs of the terminal device. That is to say, in the case that the above conditions are met, the AMF sends the Configured NSSAI of the first PLMN to the terminal device only after the AMF obtains the subscription information of the terminal device from the UDM.
  • the AMF when the terminal device repeatedly registers with the AMF in a short time, the AMF repeatedly sends the network slice selection assistance information of the configuration of the first PLMN to the terminal device, thereby further avoiding network signaling. Waste, saving network resources.
  • the AMF sends the Configured NSSAI of the first PLMN to the terminal device, that is, the foregoing step 202, the method may include: the AMF carries the Configured NSSAI of the first PLMN in the registration accept message, and sends the configuration to the terminal device, or the AMF passes the A User Equipment (UE) Configuration Update Command sends the Configured NSSAI to the terminal device.
  • UE User Equipment
  • FIG. 3 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • the UDM receives a subscription information acquisition request of the terminal device from the first AMF of the first PLMN, where the first AMF is an AMF that provides a service for the terminal device.
  • the UDM is a UDM within the home PLMN of the terminal device.
  • the UDM sends the subscription information of the terminal device to the first AMF, where the subscription information includes at least the subscribed S-NSSAIs of the terminal device.
  • the UDM instructs the first AMF to initiate an update of the network slice selection assistance information of the first configuration, where the network slice selection assistance information of the first configuration is the configured network slice selection assistance information of the first PLMN of the terminal device.
  • the first AMF initiates, according to the indication of the UDM, an update of the network slice selection assistance information of the first configuration.
  • the UDM may instruct the AMF to initiate the update of the network slice selection assistance information of the configuration when the Subscribed S-NSSAIs of the terminal device is sent to the AMF serving the terminal device.
  • the AMF can initiate an update of the configured network slice selection assistance information according to the indication of the UDM.
  • the UDM indicates that the first AMF initiates the update of the first configuration of the network slice selection assistance information, and the UDM sends the first indication information to the first AMF, where the first indication information is sent. And an update for indicating that the first AMF initiates the network slice selection assistance information of the first configuration.
  • the first AMF when receiving the first indication information from the UDM, initiates network slice selection of the first configuration based on the subscription S-NSSAIs of the terminal device included in the subscription information of the terminal device. Update of auxiliary information.
  • the UDM instructs the first AMF to initiate the update of the network slice selection assistance information of the first configuration by displaying the indication. This will be further described in conjunction with FIG.
  • the first indication information may indicate, in an implicit manner, that the first AMF initiates update of the network slice selection assistance information of the first configuration.
  • the first indication information is used to indicate that the subscription S-NSSAIs of the terminal device has been updated.
  • the first AMF when receiving the first indication information from the UDM, determines to initiate the network slice of the first configuration based on the subscribed S-NSSAIs of the terminal device included in the subscription information of the terminal device. Select an update for the secondary information. This will be further described in conjunction with FIG.
  • the UDM instructs the first AMF to initiate the update of the network slice selection assistance information of the first configuration, where the UDM sends the subscription modification notification message of the terminal device to the first AMF,
  • the subscription modification notification message of the terminal device includes the Subscribed S-NSSAIs of the terminal device.
  • the first AMF when receiving the subscription modification notification message of the terminal device from the UDM, initiates the first based on the subscribed S-NSSAIs of the terminal device included in the subscription modification notification message of the terminal device.
  • a configured network slice selects an update of the auxiliary information. This will be further described in conjunction with FIG. 5.
  • the UDM may further send a subscription request to the first AMF, where the subscription request is used to request the first AMF to send the network slice selection assistance information update after the first configuration is completed.
  • the UDM sends a notification message.
  • the first AMF sends the notification message to the UDM after receiving the configuration update complete message from the terminal device, where the configuration update complete message is used to instruct the terminal device to complete the A configured network slice selects an update of the auxiliary information.
  • the UDM can receive the notification message from the first AMF.
  • the UDM can determine whether the network slice selection assistance information of the first configuration has been updated.
  • the UDM may further determine a configured network of one or more PLMNs of the terminal device.
  • the slice selection assistance information needs to be updated, and the one or more PLMNs include the first PLMN.
  • the one or more PLMNs are PLMNs that the terminal device can register.
  • the UDM may determine that the network slice selection assistance information of the configuration of one or more PLMNs of the terminal device needs to be updated in the case of determining that the subscription information of the terminal changes.
  • the one or more PLMNs comprise a second PLMN.
  • the UDM can record an update of the network slice selection assistance information that needs to initiate the first configuration.
  • the UDM may also record an update of the network slice selection assistance information that needs to initiate the second configuration, wherein the network slice selection assistance information of the second configuration is the configured network slice selection assistance information of the second public land mobile network of the terminal device.
  • the UDM may record that the first configuration does not need to be initiated.
  • the network slice selects the update of the auxiliary information.
  • the UDM may record the update of the network slice selection assistance information that does not need to initiate the first configuration.
  • the UDM After step 304, if the UDM receives the subscription information acquisition request of the terminal device from the first AMF again, and the UDM confirms that the configured network slice selection assistance information of the first PLMN of the terminal device does not need to be updated. In this case, the UDM does not change the record of whether or not to initiate the update of the network slice selection assistance information of the first configuration. therefore. In this case, the UDM may indicate that the first AMF does not need to initiate an update of the network slice selection assistance information of the first configuration. The UDM may indicate that the first AMF does not need to initiate an update of the network slice selection assistance information of the first configuration by displaying an indication.
  • the UDM may send the second indication information to the first AMF, where the second indication information is used to indicate that the first AMF does not initiate the update of the network slice selection assistance information of the first configuration.
  • the UDM may also indicate in an implicit indication that the first AMF does not need to initiate the update of the network slice selection assistance information of the first configuration.
  • the UDM does not send information (for example, the first indication information or the subscription modification notification message of the terminal device) for indicating that the first AMF initiates the update of the network slice selection assistance information of the first configuration to the first AMF.
  • FIG. 4 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • the UDM determines that the network slice selection assistance information of the configuration of the one or more PLMNs of the terminal device needs to be updated.
  • the first PLMN is included in the one or more PLMNs.
  • the UDM is a UDM in the home PLMN of the terminal device.
  • the UDM may determine that the subscription S-NSSAIs of the terminal device changes, and further determine that the configured network slice selection assistance information of the one or more PLMNs of the terminal device needs to be updated.
  • the UDM generates a first class identifier for each PLMN of the one or more PLMNs.
  • the first type of identification is used to indicate that the AMF within the one or more PLMNs needs to initiate an update of the network slice selection assistance information for the configuration of each of the PLMNs.
  • the first type of identification of each of the PLMNs may be referred to as first indication information.
  • the first indication information is used to indicate that the first AMF in the first PLMN needs to initiate the update of the network slice selection assistance information of the first configuration.
  • the network slice selection assistance information of the first configuration is network slice selection assistance information of the configuration of the first PLMN of the terminal device.
  • step 402 can include the UDM generating first indication information.
  • the first indication information is used to indicate that the first AMF needs to initiate an update of the network slice selection assistance information of the first configuration.
  • the one or more PLMNs further include a second PLMN, and the AMF in the second PLMN is a second AMF.
  • the first type of identifier of the second PLMN may be referred to as third indication information.
  • the third indication information is used to indicate that the second AMF needs to initiate the update of the network slice selection assistance information of the second configuration.
  • the network slice selection assistance information of the second configuration is network slice selection assistance information of the configuration of the second PLMN of the terminal device.
  • the network slice selection assistance information of the configuration of the first PLMN of the terminal device referred to herein refers to the configuration network slice selection information of the first PLMN held by the terminal device.
  • the network slice selection assistance information of the configuration of the second PLMN of the terminal device refers to the network slice selection assistance information of the configuration of the second PLMN held by the terminal device.
  • the UDM record needs to send the first type identifier to the one or more PLMNs.
  • the UDM can record whether the first type of identity needs to be sent to the one or more PLMNs in a variety of ways.
  • the UDM maintains two types of identifications: a first type of identification and a second type of identification.
  • the UDM can directly save the identity of each PLMN.
  • the identifier of each PLMN is the first type of identifier or the second type of identifier. If a PLMN is identified as the first type of identifier, the first type of identifier needs to be sent to the AMF in the PLMN. If the identity of a PLMN is the second type of identity, the second type of identity needs to be sent to the AMF in the PLMN.
  • the second type of identification is used to indicate that an update of the network slice selection assistance information that does not require the AMF within the PLMN to initiate the configuration of the PLMN.
  • the UDM can set different values or different identification bits for the first type of identification and the second type of identification.
  • the UDM can maintain a type of identification: a first type of identification.
  • the UDM may store the identity of each PLMN, and the identity of each PLMN is the first class identity or no identity. If a PLMN identifier is the first type of identifier, the first type of identifier needs to be sent to the AMF in the PLMN. If there is no identity in a PLMN, there is no need to send any identity to the AMF in the PLMN or send a second type of identity.
  • the second type of identification is used to indicate that an update of the network slice selection assistance information that does not require the AMF within the PLMN to initiate the configuration of the PLMN.
  • the UDM can maintain two lists: List 1 and List 2.
  • the UDM may save the identity information of the one or more PLMNs in the list 1, and the identity information may be a PLMN ID.
  • the UDM may delete the identity information of the PLMN from the list 1 and save the identity information of the PLMN in the list 2.
  • the UDM can maintain a list.
  • the UDM may save the identity information of the one or more PLMNs in the list.
  • the UDM may delete the identity information of the PLMN from the list.
  • the first type of identifier needs to be sent to one or more PLMNs.
  • the specific manner in which the embodiment needs to send the first type of identifier to the one or more PLMNs is not limited. .
  • the terminal device selects the requested network slice selection assistance information (Requested NSSAI) according to the configured network slice selection information, and sends a registration request message carrying the requested network slice selection auxiliary information when registering with a certain PLMN.
  • Request NSSAI requested network slice selection assistance information
  • the terminal device may save the configured network slice selection assistance information of the at least one PLMN, and the network slice selection assistance information used to generate the requested network slice selection assistance information is a configured network of the PLMN to be registered by the terminal device.
  • Slice selection auxiliary information is a configured network of the PLMN to be registered by the terminal device.
  • the requested network slice selection assistance information may be a subset of the configured network slice selection assistance information.
  • the requested network slice selection assistance information may also be the same as the configured network slice selection assistance information.
  • the terminal device sends the above registration request message to the RAN device, and the RAN device selects an appropriate AMF.
  • the first AMF obtains the requested network slice selection assistance information.
  • the first PLMN is a PLMN to which the terminal device applies for registration.
  • the first AMF is a service AMF of the terminal device.
  • the first AMF may be the AMF selected by the RAN device, or the RAN device selects the second AMF network element, and the second AMF network element forwards the registration request message to the first service capable of serving the terminal device. AMF.
  • the first AMF sends a subscription information acquisition request of the terminal device to the UDM.
  • the first AMF may send a request to the UDM to invoke a service that acquires subscription information for the terminal device.
  • the UDM determines, according to the recorded information, that the first AMF needs to initiate an update of the network slice selection assistance information of the first configuration.
  • the UDM determines that the network slice selection assistance information of the configuration of the first PLMN of the terminal device needs to be updated.
  • the UDM records that the first type of identifier (ie, the first indication information) needs to be sent to the first PLMN.
  • the UDM sends the first indication information and the subscription information of the terminal device to the first AMF.
  • the subscription information of the terminal device includes the Subscribed S-NSSAIs of the terminal device.
  • the UDM After the service for acquiring the subscription information of the terminal device is invoked, the UDM returns the subscription information of the terminal to the first AMF. At the same time, the UDM also sends the first indication information to the first AMF.
  • the UMF records that the AMF of the first PLMN does not need to initiate an update of the network slice selection assistance information of the first configuration.
  • the UDM can maintain two types of identifications: the first type of identification and the second type of identification.
  • the UMM may modify the identifier of the first PLMN to the second type identifier. In this way, the UDM records that the AMF of the first PLMN does not need to initiate the update of the network slice selection assistance information of the first configuration.
  • the UDM can maintain a type of identification: a first type of identification.
  • the UDM may clear the identity of the first PLMN. In this way, the UDM records that the AMF of the first PLMN does not need to initiate the update of the network slice selection assistance information of the first configuration.
  • the UDM can maintain two lists: List 1 and List 2.
  • the UDM may delete the identity information of the first PLMN from the list 1 and 2 saves the identity information of the first PLMN. In this way, the UDM records that the AMF of the first PLMN does not need to initiate the update of the network slice selection assistance information of the first configuration.
  • the UDM can maintain a list. In case the UDM determines that the AMF of the first PLMN does not need to initiate an update of the network slice selection assistance information of the first configuration, the UDM may delete the identity information of the first PLMN from the list 1. In this way, the UDM records that the AMF of the first PLMN does not need to initiate the update of the network slice selection assistance information of the first configuration.
  • the UDM can record that the first indication information and the subscription information of the terminal device are sent to the first AMF, and the AMF of the first PLMN does not need to initiate the first configuration.
  • the network slice selects the update of the auxiliary information.
  • the UDM before the step 409, the UDM further needs to receive a notification message sent by the first AMF to indicate that the network slice selection assistance information update of the first configuration has been completed. That is, after the UDM determines that the network slice selection assistance information update of the first configuration has been completed, the AMF of the first PLMN does not need to initiate the update of the network slice selection assistance information of the first configuration. If the UDM does not receive the notification message, step 409 is not executed. In this way, it can be ensured that the indication identifier of the PLMN maintained by the UDM is the same as the actual update result of the network slice selection assistance information of the configuration of the PLMN of the terminal device.
  • the UDM may further send a subscription request to the first AMF, where the subscription request is used to request the first AMF to complete the network slice selection assistance information update of the first configuration, A notification message is sent to the UDM. That is, the UDM can indicate whether the first AMF sends the notification message to the UDM by sending a subscription request.
  • the first AMF may send a notification message to the UDM by default after the network slice selection assistance information update of the first configuration is completed. That is, the first AMF does not need to receive the subscription request from the UDM, and sends a notification message to the UDM indicating that the network slice selection assistance information update of the first configuration is completed.
  • the terminal device experiences shutdown and power-on, or the terminal device moves to register another AMF in the first PLMN, or the terminal device moves to another PLMN and then moves back to the first PLMN.
  • the Subscribed S-NSSAIs of the terminal device are not updated during the above process. In other words, during the above process, the UDM does not change the record of the first PLMN (i.e., the AMF of the first PLMN does not need to initiate the update of the network slice selection assistance information of the first configuration).
  • the UDM determines that the first AMF or another AMF in the first PLMN does not need to be initiated.
  • the network slice of the first configuration selects an update of the auxiliary information.
  • the UDM may indicate that the first AMF or another AMF in the first PLMN does not need to initiate an update of the network slice selection assistance information of the first configuration, or the UDM does not give the first AMF or the first PLMN.
  • Another AMF within the transmission indicates whether it is necessary to initiate an update of the first configuration of the network slice selection assistance information.
  • the terminal device switches from the first PLMN to the second PLMN.
  • the second AMF becomes the AMF providing the service of the terminal device.
  • the record of the second PLMN maintained by the UDM has not changed (i.e., the AMF of the second PLMN needs to initiate the update of the network slice selection assistance information of the second configuration).
  • the UDM determines that the second AMF needs to initiate the update of the network slice selection assistance information of the second configuration. In this way, the UDM can instruct the second AMF to initiate an update of the network slice selection assistance information of the second configuration.
  • the UDM may determine, according to the record, whether the indication information indicating that the AMF initiates the update of the network slice selection assistance information of the first configuration needs to be sent to the AMF in the PLMN.
  • step 401 to step 403 may be performed only when the UDM determines that the network slice selection assistance information of the configuration of the PLMN of the terminal device needs to be updated.
  • the updating, by the first AMF, the network slice selection assistance information of the first configuration may include the following steps: the AMF updates the network slice selection assistance information of the configuration of the first PLMN of the terminal device according to the subscription S-NSSAIs of the terminal device, The updated Configured NSSAI of the first PLMN is sent to the terminal device.
  • the first AMF updates the configured network slice selection assistance information of the first PLMN of the terminal device according to the subscribed S-NSSAIs of the terminal device and the S-NSSAIs corresponding to the network slice supported by the first PLMN.
  • the first AMF determines the intersection of the Subscribed S-NSSAIs and the S-NSSAIs corresponding to the network slice supported by the first PLMN, or the subset of the intersection is determined as the network slice selection assistance of the configuration of the first PLMN of the terminal device. Information to achieve updates.
  • the AMF carries the updated Configured NSSAI of the first PLMN in the registration accept message to the terminal device, or the AMF sends the updated first PLMN through the UE Configuration Update Command (UE Configuration Update Command) Configured NSSAI is sent to the terminal device.
  • UE Configuration Update Command UE Configuration Update Command
  • the AMF may further determine whether the update needs to be initiated.
  • the description is not described in detail here.
  • the subscription S-NSSAIs of the terminal device referred to herein is the subscription information of the terminal device in step 408, including the Subscribed S-NSSAIs of the terminal device.
  • the terminal device may send a notification message to the first AMF.
  • the notification message is used to indicate that the terminal device completes the update of the network slice selection assistance information of the first configuration.
  • the notification message sent by the first AMF to the UDM to indicate that the network slice selection assistance information update of the first configuration has been completed may be received by the first AMF from the terminal device.
  • the notification message is the same.
  • the first AMF can transparently transmit the notification message to the UDM.
  • the first AMF may determine, by itself, a notification message indicating that the network slice selection assistance information update of the first configuration has been completed.
  • the notification message determined by the first AMF may be the same as the content indicated by the notification message received by the first AMF, but the length or specific form of the specific message may be different.
  • the notification message sent by the terminal device to the first AMF may be a displayed notification message, and the notification message sent by the first AMF to the UDM may be an implicit notification message.
  • the UDM may determine, according to the record, whether the AMF initiates the update of the corresponding configured network slice selection assistance information according to the record, if the AMF is registered as the service AMF of the terminal device. For example, the first AMF registers with the UDM as the service AMF of the terminal device. In this case, the UDM determines, according to the record, that the first AMF needs to initiate the update of the network slice selection assistance information of the first configuration, and performs the subsequent steps.
  • FIG. 5 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • the UDM determines that a subscription modification notification message of the terminal device needs to be sent to one or more PLMNs when determining that the subscription S-NSSAIs of the terminal device changes.
  • the first PLMN is included in the one or more PLMNs.
  • the UDM is a UDM in the home PLMN of the terminal device.
  • the UDM record needs to send a subscription modification notification message of the terminal device to one or more PLMNs.
  • the subscription modification notification message of the terminal device includes the Subscribed S-NSSAIs of the terminal device.
  • the UDM can record whether the subscription modification notification message of the terminal device needs to be sent to the one or more PLMNs in various ways.
  • the UDM can maintain two types of identities: a first type of identities and a second type of identities.
  • the identifier of each PLMN is the first type of identifier or the second type of identifier. If a PLMN is identified as the first type of identifier, the subscription modification notification message of the terminal device needs to be sent to the AMF in the PLMN. If the identity of one PLMN is the second type of identity, the UE subscription modification notification message does not need to be sent to the AMF in the PLMN.
  • the UDM may generate a first type of identity for each of the one or more PLMNs.
  • the first type of identifier of the first PLMN may be referred to as first indication information. It is assumed that the second PLMN is also included in the one or more PLMNs.
  • the UDM holds a first type of identity for each of the one or more PLMNs.
  • the UDM can maintain a type of identification: a first type of identification.
  • the identity of each PLMN is the first type of identity. If a PLMN identifier is the first type of identifier, the subscription modification notification message of the terminal device needs to be sent to the AMF in the PLMN. If there is no identity in a PLMN, the UE subscription modification notification message does not need to be sent to the AMF in the PLMN.
  • the UDM may generate a first type of identity for each of the one or more PLMNs.
  • the first type of identifier of the first PLMN may be referred to as first indication information. It is assumed that the second PLMN is also included in the one or more PLMNs.
  • the UDM holds a first type of identity for each of the one or more PLMNs.
  • the first indication information is used to record a subscription modification notification message that needs to be sent to the AMF in the first PLMN.
  • step 502 can include the UDM generating first indication information.
  • the first indication information is used to record a subscription modification notification message that needs to be sent to the AMF in the first PLMN.
  • the UDM can maintain two lists: List 1 and List 2.
  • the UDM may save the identity information of the one or more PLMNs in the list 1, and the identity information may be a PLMN ID.
  • the UDM may delete the identity information of the PLMN from the list 1 and save the identity information of the PLMN in the list 2.
  • the UDM can maintain a list.
  • the UDM may save the identity information of the one or more PLMNs in the list.
  • the UDM may delete the identity information of the PLMN from the list.
  • the foregoing record needs to send the subscription change notification message of the terminal device to the one or more PLMNs
  • the specific manner in which the embodiment of the present application records whether the subscription change notification message of the terminal device needs to be sent to the one or more PLMNs is not limited.
  • 503-505 is the same as 404-406, and need not be described here.
  • the UDM determines, according to the recorded information, that a subscription modification notification message of the terminal device needs to be sent to the first AMF.
  • the UDM determines that a subscription modification notification of the terminal device needs to be sent to the AMF of the first PLMN.
  • the UDM sends a subscription modification notification message of the terminal device to the first AMF.
  • the UDM record does not need to send a subscription modification notification message of the terminal device to the first PLMN.
  • the UDM can record, in a plurality of ways, a subscription modification notification message that does not need to send the terminal device to the first PLMN.
  • the UDM can maintain two types of identifications: the first type of identification and the second type of identification.
  • the UDM may modify the identifier of the first PLMN to the second type identifier.
  • the UDM records a subscription modification notification message that does not need to send the terminal device to the first PLMN.
  • the UDM can maintain a type of identification: a first type of identification.
  • the UDM may clear the identity of the first PLMN.
  • the UDM records a subscription modification notification message that does not need to send the terminal device to the first PLMN.
  • the UDM can maintain two lists: List 1 and List 2.
  • the UDM may delete the identity information of the first PLMN from the list 1 and save the first in the list 2 The identity information of the PLMN.
  • the UDM records a subscription modification notification message that does not need to send the terminal device to the first PLMN.
  • the UDM can maintain a list. In case the UDM determines that it is not necessary to send the subscription modification notification message of the terminal device to the first PLMN, the UDM may delete the identity information of the first PLMN from the list 1. Thus, the UDM records a subscription modification notification message that does not need to send the terminal device to the first PLMN.
  • the UDM may record a subscription modification notification message that does not need to send the terminal device to the first PLMN, as long as the subscription modification notification message of the terminal device is sent to the first AMF.
  • the UDM before the step 508, the UDM further needs to receive the network slice selection assistant sent by the first AMF to indicate that the first AMF has completed the configuration of the first PLMN of the terminal device.
  • An updated notification message for the information That is, the UDM records the subscription modification notification message that the terminal device does not need to be sent to the first PLMN after determining that the AMF has completed the update of the network slice selection assistance information of the configuration of the first PLMN of the terminal device. If the UDM does not receive the notification message, then step 508 is not performed. In this way, it can be ensured that the indication identifier of the PLMN maintained by the UDM is the same as the actual update result of the network slice selection assistance information of the configuration of the PLMN of the terminal device.
  • the UDM may further send a subscription request to the first AMF, where the subscription request is used to request the network slice selection of the first AMF to complete the configuration of the first PLMN of the terminal device.
  • a notification message is sent to the UDM. That is, the UDM can indicate whether the first AMF sends the notification message to the UDM by sending a subscription request.
  • the first AMF may send a notification message to the UDM by default after updating the network slice selection assistance information of the configuration of the first PLMN of the terminal device. That is, the first AMF does not need to receive the subscription request from the UDM, and sends a notification message to the UDM for indicating that the network slice selection assistance information update of the configuration of the first PLMN of the terminal device has been completed.
  • the terminal device undergoes shutdown and power-on, or the terminal device moves to register another AMF in the first PLMN, or the terminal device moves to another PLMN and then moves back to the first PLMN. It is assumed that the Subscribed S-NSSAIs of the terminal device are not updated during the above process. In other words, during the above process, the UDM does not change the record of the first PLMN (i.e., there is always no need to send a subscription modification notification message for the terminal device to the first PLMN). In this case, after obtaining the subscription information acquisition request sent by the AMF or another AMF in the first PLMN, the UDM determines that it is not necessary to send to the first AMF or another AMF in the first PLMN.
  • the terminal device switches from the first PLMN to the second PLMN.
  • the second AMF becomes the AMF providing service of the terminal device, wherein the second AMF is the AMF in the second PLMN.
  • the UDM does not change the record of the second PLMN (i.e., there is always a need to send a subscription modification notification message for the terminal device to the second PLMN).
  • the UDM determines that the subscription modification notification message of the terminal device needs to be sent to the second AMF. In this way, the UDM can send a subscription modification notification message of the terminal device to the second AMF.
  • the UDM can determine whether it is necessary to send a UE subscription modification notification message to the AMF in the PLMN according to the record.
  • steps 501 to 502 may be performed only when the UDM determines that the subscribed S-NSSAIs of the terminal device occur.
  • the first AMF after receiving the subscription modification notification message of the terminal device from the UDM, the first AMF initiates update of the network slice selection assistance information of the configuration of the first PLMN of the terminal device.
  • the subscribed S-NSSAIs of the terminal device referred to herein is the subscription modification notification message of the terminal device in step 507, including the subscribed S-NSSAIs of the terminal device.
  • the terminal device may send a notification message to the first AMF.
  • the notification message is used to indicate that the terminal device completes the update of the network slice selection assistance information of the first configuration.
  • the notification message sent by the first AMF to the UDM to indicate that the network slice selection assistance information update of the first configuration has been completed may be received by the first AMF from the terminal device.
  • the notification message is the same.
  • the first AMF can transparently transmit the notification message to the UDM.
  • the first AMF may determine, by itself, a notification message indicating that the network slice selection assistance information update of the first configuration has been completed.
  • the notification message determined by the first AMF may be the same as the content indicated by the notification message received by the first AMF, but the length or specific form of the specific message may be different.
  • the notification message sent by the terminal device to the first AMF may be a displayed notification message, and the notification message sent by the first AMF to the UDM may be an implicit notification message.
  • the UDM determines, according to the record, whether a subscription modification notification message of the terminal device needs to be sent to the AMF according to the record if an AMF is registered as the service AMF of the terminal device.
  • the first AMF registers with the UDM as the service AMF of the terminal device.
  • the UDM determines that a subscription modification notification message of the terminal device needs to be sent to the first AMF according to the record, and performs subsequent steps.
  • FIG. 6 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • the AMF obtains the Subscribed S-NSSAIs of the terminal device.
  • the AMF is an AMF that serves the terminal device, that is, a service AMF.
  • the AMF may receive the subscribed S-NSSAIs of the terminal device from the UDM.
  • the AMF may receive the Subscribed S-NSSAIs of the terminal device from another AMF.
  • the AMF acquires network slice selection assistance information of the first configuration of the terminal device.
  • the network slice selection assistance information of the first configuration is the network slice selection assistance information of the configuration of the PLMN that the terminal device requests to register, and the PLMN that the terminal device requests to register is the PLMN where the AMF is located.
  • the registration request message sent by the terminal device to the AMF carries the network slice selection assistance information of the first configuration, and the AMF obtains the first configuration network slice assistance information from the terminal device.
  • the terminal device may carry the first configured network slice selection assistance information in the registration request message sent to the AMF only when the initial registration is performed.
  • the registration type included in the registration request message is the initial registration.
  • the network slice selection assistance information of the first configuration of the terminal device is included in the registration request.
  • the AMF obtains the network slice selection assistance information of the first configuration from the initial registration request message sent by the terminal device.
  • the terminal device may carry the network configuration selection assistance information of the first configuration in the registration request message sent to the AMF only when initially registering or switching the PLMN.
  • the registration type included in the registration request message is the initial registration.
  • Switching the PLMN triggers the mobility registration update, and the registration type included in the registration request message sent by the terminal is the mobility registration update.
  • the network slice selection assistance information of the first configuration of the terminal device is included in the registration request.
  • the AMF may obtain the network slice selection assistance information of the first configuration from the context of the terminal device.
  • the AMF acquires the context of the terminal device, and obtains network slice selection assistance information of the first configuration from the context.
  • the foregoing technical solution does not require the terminal device to carry the network slice selection assistance information of the first configuration in the registration request message, thereby saving a part of signaling overhead.
  • the first PLMN is a PLMN that the terminal device requests to register.
  • the AMF is the AMF within the first PLMN.
  • the AMF may send the configured network slice selection assistance information request message to the terminal device, where the configured network slice selection assistance information request message is used to request the terminal device to send the The first configured network slice selects the auxiliary information.
  • the AMF may send the configured network slice selection assistance information request message to the terminal device after the terminal device sends the registration request, or may send the configuration to the terminal device after the terminal device sends the initial registration request.
  • the network slice selects the auxiliary information request message; and when the AMF determines that the terminal device is handed over from the second PLMN to the first PLMN, the configured network slice selection assistance information request message is sent to the terminal device.
  • the AMF determines, according to the subscribed S-NSSAI of the terminal device, whether to initiate the update of the network slice selection assistance information of the first configuration.
  • the AMF determines that the network slice selection assistance information of the first configuration needs to be initiated, determining, according to the subscription S-NSSAIs, network slice selection assistance information of the second configuration, and sending the second configuration network slice assistance information to The terminal device.
  • the AMF may determine whether the network slice selection assistance information of the first configuration is the same as the subscription S-NSSAIs of the terminal device, if the first configuration of the network slice selection auxiliary information and the subscription If the S-NSSAIs are different, it is determined that the network slice selection assistance information initiating the first configuration needs to be updated.
  • the first PLMN is the HPLMN of the terminal device, and the AMF determines, according to the subscribed S-NSSAIs of the terminal device, one or more S-NSSAIs included in the network slice selection assistance information of the first configuration and the terminal device.
  • the AMF may update the first configuration network and select the auxiliary information to the network slice selection assistance information of the second configuration, wherein the network configuration of the second configuration selects one or more Ss included in the auxiliary information.
  • -NSSAI is the same as the Subscribed S-NSSAIs.
  • the AMF may be based on the network slice selection assistance information of the first configuration, the network slice selection assistance information of the first configuration, and the network slice of the configuration of the home public network of the terminal device.
  • the mapping relationship of the auxiliary information is selected, and the Subscribed S-NSSAIs determines whether it is necessary to initiate the update of the network slice selection auxiliary information of the configuration.
  • the first PLMN is a VPLMN of the terminal device
  • the AMF is based on the network slice selection assistance information of the first configuration, and the network configuration selection assistance information of the first configuration and the configuration of the home public network of the terminal device
  • the mapping relationship of the slice selection auxiliary information and the subscribed S-NSSAIs determine whether it is necessary to initiate the update of the network slice selection auxiliary information of the first configuration.
  • the first PLMN is a visited PLMN (Visited PLMN, VPLMN) of the terminal device
  • the network slice selection assistance information of the first configuration is network slice selection assistance information of the configuration of the VPLMN of the terminal device.
  • Table 1 shows the correspondence between the network slice selection assistance information of the configuration of the VPLMN and the network slice selection assistance information of the configuration of the HPLMN.
  • Network slice selection auxiliary information of VPLMN configuration HPLMN configured network slice selection assistance information S-NSSAI 1, S-NSSAI 2 S-NSSAI 11 S-NSSAI 3 S-NSSAI 21 S-NSSAI 4 S-NSSAI 31
  • S-NSSAI 1 and S-NSSAI2 in the configured network slice selection assistance information of the VPLMN correspond to the S-NSSAI 11 in the configured network slice selection assistance information of the HPLMN.
  • the S-NSSAI 3 in the configured network slice selection assistance information of the VPLMN corresponds to the S-NSSAI 21 in the configured network slice selection assistance information of the HPLMN.
  • the S-NSSAI 4 in the configured network slice selection assistance information of the VPLMN corresponds to the S-NSSAI 31 in the configured network slice selection assistance information of the HPLMN. It is assumed that the VPLMN is deployed with network slices corresponding to S-NSSAI 1, S-NSSAI 2, S-NSSAI 3 and S-NSSAI 4.
  • the AMF determines the subscription S with the terminal device according to the subscription S-NSSAIs of the terminal device and the mapping relationship between the network slice selection assistance information of the first configuration and the network slice selection assistance information of the configuration of the home public network of the terminal device. - the network slice selection auxiliary information corresponding to the third configuration corresponding to the NSSAIs, and determining whether the network slice selection assistance information of the first configuration is the same as the S-NSSAI corresponding to the network slice selection assistance information of the third configuration; if they are the same, There is no need to initiate an update; if not, then it is determined that an update needs to be initiated.
  • the subscription subscription S-NSSAIs includes S-NSSAI 11, S-NSSAI 21, and S-NSSAI 31, and the network slice selection assistance information of the first configuration includes S-NSSAI 1, S-NSSAI 2 , S-NSSAI3 and S-NSSAI4, then the AMF determines that the network slice selection assistance information of the first configuration does not need to be updated.
  • the network slice selection assistance information of the first configuration includes S-NSSAI 1, S-NSSAI 2, and S-NSSAI 3
  • the AMF determines that the network slice selection assistance information of the first configuration needs to be updated.
  • the AMF may determine the network slice selection of the second configuration according to the mapping relationship between the subscription S-NSSAIs and the network slice selection assistance information of the first configuration and the network slice selection assistance information of the configuration of the home public network of the terminal device.
  • Auxiliary information includes: S-NSSAI 1, S-NSSAI 2, S-NSSAI 3, and S-NSSAI 4.
  • the AMF may save the second configured network slice selection auxiliary information in a context of the terminal device, so that When the terminal device registers with other AMFs, other AMFs may directly obtain the network slice selection assistance information of the second configuration from the context of the terminal device.
  • FIG. 7 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • the terminal device registers with the first PLMN and receives an updated User Equipment Route Selection Policy (URSP).
  • URSP User Equipment Route Selection Policy
  • the terminal device registers with the first AMF of the second PLMN, and the terminal device determines that the update indication information is not sent to any access and AMF of the second PLMN.
  • the terminal device sends update indication information to the first AMF, where the update indication information is used to instruct the first AMF to send, to the terminal device, the configured network slice selection assistance information of the updated second PLMN.
  • the terminal device records that the update indication information has been sent to the second PLMN.
  • the first AMF sends, to the terminal device, the configured network slice selection assistance information of the updated second PLMN.
  • the terminal device may determine, according to the update of the URSP, the network slice selection assistance information of the configuration of each PLMN needs to be updated, and when registering to the corresponding PLMN, actively initiate the network configured by the PLMN of the terminal device according to the determination result.
  • the slice selection auxiliary information is updated.
  • FIG. 10 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • the method involves at least the interaction between the terminal device, the AMF and the UDM.
  • the terminal device, the AMF, and the UDM may be the terminal device 110, the access and mobility management function network element 120, and the unified data management network element 130 in FIG. 1, and details are not described herein again.
  • the terminal device and the AMF are located in the first PLMN.
  • the first PLMN is the PLMN currently serving the terminal device.
  • the first PLMN may be a HPLMN, or the first PLMN may also be a VPLMN.
  • the UDM is located in the HPLMN of the terminal device.
  • the method includes the following steps:
  • the UDM sends the updated subscription network slice selection assistance information (updatedSubscribed S-NSSAIs) of the terminal device to the AMF in the first PLMN.
  • the updated Subscribed S-NSSAIs of the terminal device are used to identify one or more network slices that the terminal device can access under the first PLMN after the update.
  • the UDM can notify the AMF in the first PLMN by calling the service of the UDM's subscriber data management (SDM) notification (Nudm_SDM_Notification). Signing up for S-NSSAI.
  • the UDM may also send the Subscribed S-NSSAIs and the first indication information to the AMF in the first PLMN by calling the service of Nudm_SDM_Get.
  • the first indication information is used to indicate that the subscription S-NSSAI has been updated, that is, the Subscribed S-NSSAIs is the updated Subscribed S-NSSAIs.
  • the AMF may return an acknowledgement (ACK) message to the UDM.
  • ACK acknowledgement
  • the AMF determines a first configuration network slice selection assistance information (first configured NSSAI, first configuration NSSAI) of the terminal device associated with the first PLMN.
  • the first configuration NSSAI of the terminal device associated with the first PLMN is used to identify that the network slice that the terminal device can access is configured under the first PLMN.
  • the functions of the second configuration NSSAI and the third configuration NSSAI are similar, and will not be described again.
  • the AMF determines to initiate an update of the configuration NSSAI of the first PLMN. That is, in the case where the subscription S-NSSAI of the first PLMN is updated, the AMF determines to initiate an update of the configuration NSSAI of the first PLMN.
  • the AMF may also determine an update that initiates a correspondence between the configuration NSSAI of the first PLMN and the configured NSSAI of the HPLMN.
  • the AMF may also initiate the update of the correspondence between the configuration NSSAI of the first PLMN and the configuration NSSAI of the HPLMN, which is not limited herein.
  • the first configuration NSSAI of the first PLMN may be determined according to the updated subscription S-NSSAI.
  • the AMF may obtain the first configuration NSSAI from the Network Slice Selection Function (NSSF) network element.
  • the NSSF function includes selecting a network slice for the terminal device.
  • the AMF acquires the first configuration NSSAI of the terminal device associated with the first PLMN.
  • the AMF obtains a correspondence between the first configuration NSSAI and the configured NSSAI of the HPLMN according to the obtained first configuration NSSAI.
  • the AMF sends, to the terminal device, a first configuration NSSAI (and/or a correspondence between the first configuration NSSAI and the configured NSSAI of the HPLMN) and second indication information.
  • the second indication information is used to instruct the terminal device to delete the second configuration NSSAI associated with other networks than the first PLMN.
  • the AMF determines to initiate the update of the configuration NSSAI of the first PLMN, and then sends the second indication information to the UE by step 1003. That is to say, when the AMF is notified that the subscription S-NSSAI of the first PLMN is updated, the AMF sends the second indication information to the UE through step 1003.
  • the AMF may send a UE configuration update command to the terminal device, where the user equipment configuration update command includes the first configuration NSSAI and the second indication information; or, the AMF may send the registration accept to the terminal device (registration accept The message accepts the first configuration NSSAI and the second indication information, which is not limited herein.
  • the (R) AN device forwards the message to the terminal device.
  • other networks other than the first network may refer to other PLMNs other than the first PLMN within the network range that the terminal may access.
  • the second indication information is further used to instruct the terminal device to delete the allowed network slice selection assistance information (allowed NSSAI, allowed NSSAI) associated with the network other than the first PLMN.
  • the allowed NSSAI associated with the terminal by the terminal device is used to identify a network slice that allows the terminal device to access under the first PLMN.
  • the second indication information is further used to indicate that the terminal device deletes a correspondence between the second configuration NSSAI associated with the other network except the first PLMN and the configuration NSSAI of the HPLMN.
  • the second indication information is further used to indicate that the terminal device deletes the correspondence between the allowed NSSAI associated with the network other than the first PLMN and the configured NSSAI of the HPLMN.
  • the terminal device After receiving the first configuration NSSAI and the second indication information, the terminal device deletes the second configuration NSSAI associated with the other network except the first PLMN; and replaces the stored third configuration NSSAI associated with the first PLMN with The first configuration NSSAI.
  • the terminal device receives the step 1003. After the indication information is sent, the correspondence between the second configuration NSSAI and the configuration NSSAI of the HPLMN is also deleted.
  • the AMF sends the updated configuration NSSAI of the current PLMN to the terminal device, and instructs the terminal device to delete the other stored before. PLMN configuration NSSAI.
  • the terminal device registers with another PLMN next time, the terminal device does not carry the requested NSSAI (Requested NSSAI) in the registration request because the terminal device does not store the configured NSSAI corresponding to the PLMN, so the network side according to the terminal
  • the current subscription information of the device provides the terminal device with a configuration NSSAI of the PLMN. Therefore, the configuration of the PLMN NSSAI can be updated in time, thereby improving the user experience of the terminal device and saving network resources.
  • the terminal device when the second indication information is further used to indicate that the terminal device deletes the allowed NSSAI associated with the other network, after receiving the indication information sent in step 1003, the terminal device further deletes the allowed NSSAI associated with the other network. .
  • the terminal device further deletes a correspondence between the allowed NSSAI associated with the other network except the first PLMN and the configured NSSAI of the HPLMN.
  • the terminal device when the terminal device registers with another PLMN next time, since the terminal device does not store the allowed NSSAI corresponding to the PLMN, the terminal device cannot determine the requested NSSAI according to the allowed NSSAI, and thus does not carry the request in the registration request.
  • the NSSAI the network side provides a configuration NSSAI of the PLMN for the terminal device according to the current subscription information of the terminal device. Therefore, it is further ensured that the configuration of the PLMN NSSAI can be updated in time.
  • the AMF may not send the second indication information.
  • the terminal device may not need the indication of the AMF, that is, delete the second configuration NSSAI associated with the other network except the first PLMN; and replace the stored third configuration NSSAI associated with the first PLMN.
  • the NSSAI is configured for the first.
  • the terminal device may further delete the allowed NSSAI associated with other networks.
  • the terminal device further deletes a correspondence between the second configuration NSSAI and the configured NSSAI of the HPLMN.
  • the terminal device also deletes the correspondence between the allowed NSSAI associated with the other network except the first PLMN and the configured NSSAI of the HPLMN.
  • step 1005 is performed.
  • the terminal device sends an acknowledgement (ACK) to the AMF.
  • ACK acknowledgement
  • the terminal device may send an ACK to the AMF after receiving the first configuration NSSAI and performing the operation of step 1004.
  • the terminal device may send an ACK to the AMF through the UE configuration update completion message. If the first configuration NSSAI in the above step 1003 is sent by using the registration accept message, the UE may send an ACK to the AMF through the registration completion message.
  • step 1006 is performed.
  • the AMF After the AMF receives the ACK, the AMF notifies the UDM of the configuration result of the NSSAI.
  • the AMF may notify the UDM of the configuration result of the NSSAI by calling the service of the UE configuration update notification (Namf_Communication_UEConfigurationUpdateNotify) of the AMF.
  • the above step 1001 may be regarded as a UDM subscription to the AMF.
  • the UDM determines that it is not necessary to initiate an update to configure NSSAI.
  • the UDM does not initiate an update to configure the NSSAI until the subscription S-NSSAI of the terminal device is updated again.
  • the AMF can notify the UDM of the update result of the NSSAI by calling the service of the event notification (Namf_EventExposure_Notify) of the AMF.
  • the UDM subscribes to the service to the AMF.
  • the UDM determines that it is not necessary to initiate an update to configure NSSAI.
  • the UDM does not initiate an update to configure the NSSAI until the subscription S-NSSAI of the terminal device is updated again.
  • the example of FIG. 10 is applicable to the configuration NSSAI update triggered by the terminal device subscription modification (referring to the modification of the Subscribed S-NSSAIs in the subscription data).
  • conditionally triggered configuration NSSAI updates include at least one of the following:
  • the terminal device does not carry the requested NSSAI when sending the registration request
  • One of the S-NSSAIs in the NSSAI requested by the terminal device is invalid in the current PLMN of the terminal device;
  • the NSSAI requested by the terminal device is not within the scope of the subscription S-NSSAIs of the terminal device.
  • the AMF instructs the terminal device to delete the second configuration NSSAI associated with other networks than the first PLMN, or to indicate the terminal device only if the terminal device subscribes to modify the triggered configuration NSSAI update.
  • the second configuration NSSAI associated with the other networks except the first PLMN and the allowed NSSAI are deleted.
  • the method described in FIG. 10 can be applied to a scenario in which the terminal device is powered off and on, and is also applicable to a roaming scenario.
  • the method described in any of the foregoing FIG. 2 to FIG. 7 may be adopted; for the roaming scenario, the method described in FIG. 10 may be employed.
  • the present application provides a communication method, as shown in FIG. 11, the method includes the following steps:
  • the access and mobility management function network element of the first network acquires first configuration network slice selection assistance information of the terminal device associated with the first network.
  • the access and mobility management function network element sends the first configuration network slice selection assistance information and indication information to the terminal device, where the indication information is used to indicate that the terminal device deletes and deletes the first A second configuration network slice associated with other networks outside the network selects auxiliary information.
  • the step 1102 includes: the access and mobility management function network element sends a user equipment configuration update command to the terminal device, where the user equipment configuration update command includes the first configuration network slice selection auxiliary information and the Instructing the information; or, the access and mobility management function network element sends a registration accept message to the terminal device, where the registration accept message includes the first configured network slice selection assistance information and the indication information.
  • the terminal device when the terminal device registers with the other network next time, the terminal device does not store the requested network slice selection auxiliary information in the registration request because the terminal device does not store the configured network slice selection auxiliary information corresponding to the network, so the network side
  • the terminal device is provided with a configuration network slice selection auxiliary information of the network according to the current subscription information of the terminal device. Therefore, the configuration network slice selection auxiliary information of the network can be updated in time, thereby improving the user experience of the terminal device and saving network resources.
  • the indication information is further used to instruct the terminal device to delete the allowed network slice selection assistance information associated with the other network. Therefore, when the terminal device registers to another network next time, since the terminal device does not store the allowed network slice selection assistance information corresponding to the network, the terminal device cannot determine the requested network slice selection assistance according to the allowed network slice selection assistance information.
  • the information does not carry the requested network slice selection auxiliary information in the registration request, so the network side provides the terminal device with a configuration network slice selection auxiliary information of the network according to the current subscription information of the terminal device. Therefore, it is further ensured that the configuration network slice selection auxiliary information of the network can be updated in time.
  • the access and mobility management function network element of the first network acquires first configuration network slice selection assistance information of the terminal device associated with the first network, including: the access and mobility management The functional network element receives updated Subscribed S-NSSAIs of the terminal device associated with the first network from a data management network element; the access and mobility management function network element is based on the updated Subscribed S-NSSAIs, Obtaining the first configuration network slice selection assistance information.
  • the access and mobility management function network element determines that the first configuration network slice selection assistance information is obtained based on the updated Subscribed S-NSSAIs, and the indication information is sent to the terminal device accordingly. For example, refer to the description of steps 1001 and 1002 in FIG. 10 above.
  • the present application provides a communication method, as shown in FIG. 12, the method includes the following steps:
  • the terminal device receives, by the access and mobility management function network element of the first network, first configuration network slice selection assistance information corresponding to the terminal device of the first network.
  • step 1201 reference may be made to the description of step 1003 in FIG. 10, and details are not described herein again.
  • the terminal device deletes second configuration network slice selection assistance information associated with other networks except the first network, and replaces the stored third configuration network slice selection auxiliary information associated with the first network with The first configuration network slice selection auxiliary information.
  • Step 1202 can refer to the description of step 1004 in FIG. 10, and details are not described herein again.
  • the terminal device deletes the second configuration network slice selection assistance information associated with the other network except the first network, when the terminal device registers with the other network next time, the terminal device does not store the configuration network corresponding to the network.
  • the slice selection auxiliary information the terminal device does not carry the requested network slice selection auxiliary information in the registration request, so the network side provides the terminal device with a configuration network slice selection auxiliary information of the network device according to the current subscription information of the terminal device. . Therefore, the configuration network slice selection auxiliary information of the network can be updated in time, thereby improving the user experience of the terminal device and saving network resources.
  • the method further includes: the terminal device receiving the indication information from the access and mobility management function network element, where the indication information is used to instruct the terminal device to delete the second configuration network slice selection assistant information.
  • the terminal device receiving the indication information from the access and mobility management function network element, where the indication information is used to instruct the terminal device to delete the second configuration network slice selection assistant information.
  • the method further includes: deleting, by the terminal device, the allowed network slice selection assistance information associated with the other network.
  • the terminal device registers to another network next time, since the terminal device does not store the allowed network slice selection assistance information corresponding to the network, the terminal device cannot determine the requested network slice selection assistance according to the allowed network slice selection assistance information.
  • the information does not carry the requested network slice selection auxiliary information in the registration request, so the network side provides the terminal device with a configuration network slice selection auxiliary information of the network according to the current subscription information of the terminal device. Therefore, it is further ensured that the configuration network slice selection auxiliary information of the network can be updated in time.
  • the method further includes: the terminal device receiving the indication information from the access and mobility management function network element, where the indication information is used to instruct the terminal device to delete the second configuration network slice selection Auxiliary information and allow network slicing to select auxiliary information.
  • FIG. 13 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • the method involves at least the interaction between the terminal device, the AMF and the UDM.
  • the terminal device, the AMF, and the UDM may be the terminal device 110, the access and mobility management function network element 120, and the unified data management network element 130 in FIG. 1, and details are not described herein again.
  • the terminal device and the AMF are located in the first PLMN.
  • the first PLMN is the PLMN currently serving the terminal device.
  • the first PLMN may be a HPLMN, or the first PLMN may also be a VPLMN.
  • the UDM is located in the HPLMN of the terminal device.
  • the method includes the following steps:
  • the UDM sends updated subscription network slice selection assistance information (updated Subscribed S-NSSAIs) of the terminal device to the AMF in the first PLMN.
  • updated Subscribed S-NSSAIs of the terminal device are used to identify one or more network slices that the terminal device can access under the first PLMN after the update.
  • the UDM can notify the AMF in the first PLMN by calling the service of the UDM's subscriber data management (SDM) notification (Nudm_SDM_Notification). Signing up for S-NSSAI.
  • the UDM may also send the Subscribed S-NSSAIs and the first indication information to the AMF in the first PLMN by calling the service of Nudm_SDM_Get.
  • the first indication information is used to indicate that the subscription S-NSSAI has been updated, that is, the Subscribed S-NSSAIs is the updated Subscribed S-NSSAIs.
  • the AMF may return an acknowledgement (ACK) message to the UDM.
  • ACK acknowledgement
  • the AMF sends the second indication information to the terminal device.
  • the second indication information is used to instruct the terminal device to delete the second configuration NSSAI associated with the other than the first PLMN.
  • the AMF when the AMF is notified that the subscription S-NSSAI of the first PLMN is updated, the AMF sends the second indication information to the UE through step 1302.
  • the AMF may send a UE configuration update command to the terminal device, where the user equipment configuration update command includes second indication information; or, the AMF may send a registration accept message to the terminal device, the registration The acceptance message includes the second indication information, which is not limited herein.
  • the (R) AN device forwards the message to the terminal device.
  • other networks other than the first network may refer to other PLMNs other than the first PLMN within the network range that the terminal may access.
  • the second indication information is further used to instruct the terminal device to delete the allowed network slice selection assistance information (allowed NSSAI, allowed NSSAI) associated with the network other than the first PLMN.
  • the allowed NSSAI associated with the terminal by the terminal device is used to identify a network slice that allows the terminal device to access under the first PLMN.
  • the second indication information is further used to indicate that the terminal device deletes a correspondence between the second configuration NSSAI associated with the other network except the first PLMN and the configuration NSSAI of the HPLMN.
  • the second indication information is further used to indicate that the terminal device deletes the correspondence between the allowed NSSAI associated with the network other than the first PLMN and the configured NSSAI of the HPLMN.
  • the AMF confirms that the third configuration NSSAI of the terminal associated with the first PLMN does not need to be updated.
  • the terminal device After receiving the second indication information, the terminal device deletes the second configuration NSSAI associated with the network other than the first PLMN.
  • the terminal device when the second indication information is further used to indicate that the terminal device deletes the correspondence between the second configuration NSSAI associated with the other network except the first PLMN and the configured NSSAI of the HPLMN, the terminal device receives the step 1302. After the indication information is sent, the correspondence between the second configuration NSSAI and the configuration NSSAI of the HPLMN is also deleted.
  • the AMF instructs the terminal device to delete the configuration NSSAI of the other PLMNs stored before.
  • the terminal device does not carry the requested NSSAI (Requested NSSAI) in the registration request because the terminal device does not store the configured NSSAI corresponding to the PLMN, so the network side according to the terminal
  • the current subscription information of the device provides the terminal device with a configuration NSSAI of the PLMN. Therefore, the configuration of the PLMN NSSAI can be updated in time, thereby improving the user experience of the terminal device and saving network resources.
  • the terminal device when the second indication information is further used to indicate that the terminal device deletes the allowed NSSAI associated with the other network, after receiving the indication information sent in step 1302, the terminal device further deletes the allowed NSSAI associated with the other network. .
  • the terminal device further deletes a correspondence between the allowed NSSAI associated with the other network except the first PLMN and the configured NSSAI of the HPLMN.
  • the terminal device when the terminal device registers with another PLMN next time, since the terminal device does not store the allowed NSSAI corresponding to the PLMN, the terminal device cannot determine the requested NSSAI according to the allowed NSSAI, and thus does not carry the request in the registration request.
  • the NSSAI the network side provides a configuration NSSAI of the PLMN for the terminal device according to the current subscription information of the terminal device. Therefore, it is further ensured that the configuration of the PLMN NSSAI can be updated in time.
  • step 1304 is performed.
  • the terminal device sends an acknowledgement (ACK) to the AMF.
  • ACK acknowledgement
  • the terminal device may send an ACK to the AMF after receiving the first configuration NSSAI and performing the operation of step 1303.
  • the terminal device may send an ACK to the AMF through the UE configuration update completion message.
  • the second indication information in the above step 1302 is sent by the registration accept message, the UE may send an ACK to the AMF through the registration completion message.
  • step 1305 is performed.
  • the AMF After the AMF receives the ACK, the AMF notifies the UDM of the configuration result of the NSSAI.
  • the AMF may notify the UDM of the configuration result of the NSSAI by calling the service of the UE configuration update notification (Namf_Communication_UEConfigurationUpdateNotify) of the AMF.
  • the foregoing step 1301 may be regarded as a UDM subscription to the AMF.
  • the UDM determines that it is not necessary to initiate an update to configure NSSAI.
  • the UDM does not initiate an update to configure the NSSAI until the subscription S-NSSAI of the terminal device is updated again.
  • the AMF can notify the UDM of the update result of the NSSAI by calling the service of the event notification (Namf_EventExposure_Notify) of the AMF.
  • the UDM subscribes to the service to the AMF.
  • the UDM determines that it is not necessary to initiate an update to configure NSSAI.
  • the UDM does not initiate an update to configure the NSSAI until the subscription S-NSSAI of the terminal device is updated again.
  • the example of FIG. 13 is applicable to the configuration NSSAI update triggered by the terminal device subscription modification (referring to the modification of the Subscribed S-NSSAIs in the subscription data), and supports the scenario in which the configuration of the first PLMN management does not require updating of the NSSAI.
  • conditionally triggered configuration NSSAI updates include at least one of the following:
  • the terminal device does not carry the requested NSSAI when sending the registration request
  • One of the S-NSSAIs in the NSSAI requested by the terminal device is invalid in the current PLMN of the terminal device;
  • the NSSAI requested by the terminal device is not within the scope of the subscription S-NSSAIs of the terminal device.
  • the AMF instructs the terminal device to delete the second configuration NSSAI associated with other networks than the first PLMN, or to indicate the terminal device only if the terminal device subscribes to modify the triggered configuration NSSAI update.
  • the second configuration NSSAI associated with the other networks except the first PLMN and the allowed NSSAI are deleted.
  • the method described in FIG. 13 can be applied to a scenario in which a terminal device registers and then re-registers (such as powering off and on), and is also applicable to a roaming scenario.
  • a terminal device registers and then re-registers (such as powering off and on)
  • the method described in any of the foregoing FIG. 2 to FIG. 7 may be adopted; for the roaming scenario, the method described in FIG. 13 may be adopted. method.
  • the access and mobility management function network element may only send indication information to the terminal device, the indication information being used to indicate
  • the terminal device deletes second configuration network slice selection assistance information associated with other networks than the first network.
  • the terminal device may delete second configuration network slice selection assistance information associated with other networks than the first network. Since the terminal device does not receive the first configuration network slice selection assistance information, the stored third configuration network slice selection assistance information associated with the first network may not be replaced with the first configuration network slice selection assistance information.
  • each solution of the communication method provided by the embodiment of the present application is introduced from the perspective of the interaction between the network elements and the network elements.
  • each network element includes a corresponding hardware structure and/or software module for executing each function.
  • the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • the communication device is located in the first public land mobile network and may include a receiving module 801, a processing module 802, and a transmitting module 803, as shown in FIG. 8A.
  • the device can be an access and mobility management function network element or chip.
  • the apparatus can be used to perform the operations of the access and mobility management function network elements of FIG. 2 above.
  • the receiving module 801 is configured to receive a registration request message from the terminal device
  • the processing module 802 is configured to send, by using the sending module 803, the first public land mobile network to the terminal device, if it is determined that the first condition is met.
  • the configured network slice selection auxiliary information wherein the first condition includes any one of: the registration request message is an initial registration request message, or the registration request message is that the terminal device moves from the second public land Transmitted after the network moves to the first public land mobile network.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device and saving Network resources.
  • the first condition further includes that the access and mobility management function network element acquires subscription information of the terminal device from the unified data management network element. Therefore, when the terminal device is repeatedly registered to the AMF in a short time, the AMF repeatedly sends the network slice selection assistance information of the configuration of the first PLMN to the terminal device, thereby further avoiding waste of network signaling. Save network resources.
  • Another communication device can include a receiving module 811 and a transmitting module 812, as shown in Figure 8B.
  • the processing module 813 is further included.
  • the device can be a unified data management network element or chip.
  • the apparatus can be used to perform the operations of the UDM of Figures 3, 4 or 5 above.
  • the receiving module 811 is configured to receive a subscription information acquisition request of the terminal device from the first access and mobility management function network element in the first public land mobile network, where the first access and mobility management function network
  • the element is an access and mobility management function network element that provides the terminal device with a service
  • the sending module 812 is configured to send the subscription information of the terminal device to the first access and mobility management function network element, where
  • the subscription information of the terminal device includes at least the subscription network slice selection assistance information of the terminal device, and is further configured to instruct the first access and mobility management function network element to initiate the update of the network slice selection assistance information of the first configuration
  • the network slice selection assistance information of the first configuration is network slice selection assistance information of the configuration of the first public land mobile network of the terminal device.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device and saving Network resources.
  • the sending module 812 is configured to send first indication information to the first access and mobility management function network element, where the first indication information is used to indicate the first access and mobility management function network.
  • the element initiates an update of the network slice selection assistance information of the first configuration.
  • the sending module 812 is configured to send a subscription modification notification message of the terminal device to the first access and mobility management function network element, where the subscription modification notification message of the terminal device includes the subscription of the terminal device.
  • Network slice selection auxiliary information is configured to send first indication information to the first access and mobility management function network element, where the first indication information is used to indicate the first access and mobility management function network.
  • the element initiates an update of the network slice selection assistance information of the first configuration.
  • the sending module 812 is configured to send a subscription modification notification message of the terminal device to the first access and mobility management function network element, where the subscription modification notification message of the terminal device includes the subscription of the terminal device.
  • Network slice selection auxiliary information is configured to send first indication information to the first access and mobility management function network element, where the first
  • the sending module 812 is further configured to send a subscription request to the first access and mobility management function network element, where the subscription request is used to request the first access and mobility management function network element.
  • the processing module 813 is configured to: after the sending module instructs the first access and mobility management function network element to initiate the update of the network configuration selection assistance information of the first configuration, determining that the first The configured network slice selects the update of the auxiliary information.
  • the processing module 813 is configured to determine, after the receiving module receives the notification message from the first access and mobility management function network element, that the network slice selection assistance information of the first configuration does not need to be initiated. .
  • the processing module 813 is configured to determine one or more of the terminal, before the sending module instructs the first access and mobility management function network element to initiate the update of the network configuration selection auxiliary information of the first configuration.
  • the network slice selection assistance information of the configuration of the public land mobile network needs to be updated, and the one or more public land mobile networks include the first public land mobile network.
  • the processing module 813 is configured to determine that the network slice selection assistance information of the configuration of one or more public land mobile networks of the terminal needs to be updated in a case where it is determined that the subscription information of the terminal changes.
  • Another communication device can include a transmitting module 821, a receiving module 822, and a processing module 823, as shown in Figure 8C.
  • the device can be an access and mobility management function network element or chip.
  • the apparatus can be used to perform the operations of the AMF of Figures 3, 4 or 5 above.
  • the sending module 821 is configured to send a subscription information acquisition request of the terminal device to the unified data management network element, where the first access and mobility management function network element is an access and mobile service for providing the terminal device.
  • the receiving module 822 is configured to receive the subscription information of the terminal device from the unified data management network element, where the subscription information of the terminal device includes at least the subscription network slice selection auxiliary information of the terminal device;
  • the module 823 is configured to initiate, according to the indication of the unified data management network element, an update of the first configured network slice selection auxiliary information, where the first configured network slice selection auxiliary information is the first public of the terminal device.
  • the network slice of the configuration of the land mobile network selects auxiliary information.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device and saving Network resources.
  • the processing module 823 is configured to: when the receiving module receives the first indication information from the unified data management network element, select the auxiliary information according to the subscription network slice, and initiate the first The configured network slice selects the update of the auxiliary information.
  • the processing module 823 is configured to: when the receiving module receives the subscription modification notification message of the terminal device from the unified data management network element, based on the subscription modification notification message of the terminal device The subscription network slice selection auxiliary information of the terminal device initiates update of the first configured network slice selection auxiliary information.
  • the receiving module 822 is further configured to receive a subscription request from the unified data management network element, where the subscription request is used to request the first access and mobility management function network element in the first configuration.
  • the notification message is sent to the unified data management network element; after the receiving module 822 receives the configuration update completion message from the terminal device, the sending module 821 is further used for The unified data management network element sends the notification message, where the configuration update completion message is used to instruct the terminal device to complete the update of the network slice selection assistance information of the first configuration.
  • Another communication device can include an acquisition module 831 and a processing module 832, as shown in Figure 8D.
  • the device can be an access and mobility management function network element or chip.
  • the apparatus can be used to perform the operations of the AMF of Figure 6 above.
  • the obtaining module 831 is configured to acquire the subscription network slice selection assistance information of the terminal device, and obtain the network slice selection assistance information of the first configuration of the terminal device, where the network configuration selection auxiliary information of the first configuration is the
  • the terminal device requests the configured network slice selection assistance information of the first public land mobile network to be registered;
  • the processing module 832 is configured to determine, according to the subscription network slice selection assistance information, whether the network slice selection assistance information of the first configuration needs to be updated; If it is determined that the network slice selection assistance information of the first configuration needs to be updated, determining, according to the subscription network slice selection assistance information, network slice selection assistance information of the second configuration, and selecting, by the sending module, the network slice of the second configuration
  • the auxiliary information is sent to the terminal device.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device and saving Network resources.
  • the obtaining module 831 is configured to receive a registration request message from the terminal device, where the registration request message includes the network slice selection assistance information of the first configuration.
  • the registration request message is an initial registration request message, or the registration request message is sent after the terminal device moves from the second public land mobile network to the first public land mobile network.
  • the obtaining module 831 is configured to acquire a context of the terminal device, where the context of the terminal device includes network slice selection assistance information of the first configuration.
  • the processing module 832 is configured to determine whether the network slice selection assistance information of the first configuration is the same as the subscription network slice selection assistance information, if the network configuration selection assistance information of the first configuration is The network slice selection assistance information of the first configuration needs to be updated to the network slice selection assistance information of the second configuration, where the network slice selection assistance information of the second configuration is included.
  • the single network slice selection assistance information is the same as the subscription network slice selection assistance information.
  • the network slice selection assistance information of the first configuration is a network slice selection auxiliary information of a configuration of the visited public land network of the terminal device, where the processing module 832 is configured to use the network according to the first configuration.
  • the processing module 832 is further configured to save the network configuration selection assistance information of the second configuration in a context of the terminal device.
  • Another communication device can include a transmitting module 841 and a receiving module 842, as shown in Figure 8E.
  • the device can be a terminal device or a chip.
  • the apparatus can be used to perform the operations of the UE of FIG. 6 above.
  • the sending module 841 is configured to send a registration request message to the access and mobility management function network element, where the registration request message includes network slice selection assistance information of the first configuration of the terminal device, and the first configured network
  • the slice selection assistance information is configured for the network slice selection assistance information of the configuration of the first public land mobile network that the terminal device requests to register;
  • the receiving module 842 is configured to acquire the network slice selection assistance of the second configuration of the first public land mobile network. information.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device and saving Network resources.
  • the registration request message is an initial registration request message, or the registration request message is sent after the terminal device moves from the second public land mobile network to the first public land mobile network.
  • Another communication device can include a receiving module 851, a processing module 852, and a transmitting module 853, as shown in Figure 8F.
  • the device can be a terminal device or a chip.
  • the apparatus can be used to perform the operations of the UE of FIG. 7 above.
  • the receiving module 851 is configured to receive an updated user routing policy
  • the processing module 852 is configured to determine that the update indication information is not sent to the access and mobility management function network element
  • the sending module 853 is configured to access the mobility and mobility.
  • the management function network element sends update indication information, where the update indication information is used to indicate that the access and mobility management function network element sends updated configuration network slice selection assistance information to the terminal device, where the access and mobility management function network
  • the element is located in the visited public land mobile network
  • the processing module 852 is configured to record that the update indication information has been sent to the visited PLMN.
  • the foregoing method can ensure that the configured NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device and saving Network resources.
  • Another communication device can include an acquisition module 861 and a transmission module 862, as shown in Figure 8G.
  • the device can be an access and mobility management function network element or chip.
  • the apparatus can be used to perform the operations of the AMF of Figure 10 or 11 above.
  • the obtaining module 861 is configured to acquire first configuration network slice selection assistance information of the terminal device associated with the first network
  • the sending module 862 is configured to send the first configuration network slice selection auxiliary information to the terminal device.
  • Instructing information the indication information is used to instruct the terminal device to delete second configuration network slice selection assistance information associated with other networks than the first network.
  • the foregoing communication device can ensure that the configuration NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device and saving network resources.
  • the indication information is further used to instruct the terminal device to delete the allowed network slice selection assistance information associated with the other network.
  • the obtaining module 861 is specifically configured to: receive, by the data management network element, the terminal associated with the first network The updated Subscribed S-NSSAIs of the device; the first configured network slice selection assistance information is obtained according to the updated Subscribed S-NSSAIs.
  • the communication device determines that the first configuration network slice selection assistance information is acquired based on the updated Subscribed S-NSSAIs, such that the sending module 862 sends the indication information to the terminal device.
  • the sending module 862 is specifically configured to: send a user equipment configuration update command to the terminal device, where the user equipment configuration update command includes the And configuring the network slice selection auxiliary information and the indication information; or sending a registration accept message to the terminal device, where the registration accept message includes the first configuration network slice selection auxiliary information and the indication information.
  • Another communication device can include a receiving module 871 and a processing module 872, as shown in Figure 8H.
  • the device can be a terminal device or a chip.
  • the apparatus can be used to perform the operations of the terminal device of Figure 10 or 12 above.
  • the receiving module 871 is configured to receive, by the access and mobility management function network element of the first network, the first configuration network slice selection auxiliary information corresponding to the terminal device of the first network;
  • the processing module 872 is configured to delete and Second configuration network slice selection assistance information associated with other networks other than the first network; replacing the stored third configuration network slice selection assistance information associated with the first network with the first configuration network slice selection Supplementary information.
  • the foregoing communication device can ensure that the configuration NSSAI of the first PLMN used by the terminal device is updated in time, thereby improving the user experience of the terminal device and saving network resources.
  • the receiving module 871 is further configured to receive the indication information from the access and mobility management function network element, where the indication information is used to instruct the terminal device to delete the second configuration network slice selection assistance information.
  • the processing module 872 is further configured to delete the allowed network slice selection assistance information associated with the other network.
  • the receiving module 871 is configured to receive the indication information from the access and mobility management function network element, where the indication information is used to instruct the terminal device to delete the second configuration network slice selection auxiliary information and Allow network slices to select auxiliary information.
  • FIG. 9 shows another possible structural diagram of the communication device involved in the above embodiment.
  • the apparatus includes a transceiver 1001 and a processor 1002, as shown in FIG.
  • the processor 1002 can be a general purpose microprocessor, a data processing circuit, an application specific integrated circuit (ASIC), or a field-programmable gate arrays (FPGA) circuit.
  • the device can also include a memory 1003. The memory is for coupling with a processor 1002 that holds the computer program 10031 necessary for the device.
  • the communication method involved in the above embodiments further provides a computer readable storage medium 1004 (eg, a hard disk) in which the computer program 10041 of the above device is stored, and the computer program can be 10041 is loaded into the processor 1002.
  • a computer readable storage medium 1004 eg, a hard disk
  • the computer program 10041 of the above device is stored, and the computer program can be 10041 is loaded into the processor 1002.
  • the computer can be caused to perform the methods described above.
  • the processor 1002 is configured to perform the operations or functions of the access and mobility management function network element (AMF) described above.
  • Transceiver 1004 is used to implement communication of the device with a UDM, RAN device, or other AMF.
  • the processor 1002 is configured to perform the operations or functions of the unified data management network element (UDM) described above.
  • Transceiver 1004 is used to implement communication of the device with the AMF.
  • the processor 1002 is configured to perform the operations or functions of the terminal device (UE) described above.
  • the transceiver 1004 is configured to implement communication between the device and the AMF, RAN device.
  • the processor for performing the message transmission apparatus of the present application may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or Other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
  • the steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware or may be implemented by a processor executing software instructions.
  • the software instructions may be comprised of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage well known in the art.
  • An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a communication device.
  • the memory 1003 may include a volatile memory such as a random-access memory (RAM); the memory 701 may also include a non-volatile memory such as a flash memory (flash) Memory), hard disk drive (HDD) or solid-state drive (SSD); the memory 701 may also include a combination of the above types of memories.
  • RAM random-access memory
  • flash flash memory
  • HDD hard disk drive
  • SSD solid-state drive
  • a further aspect of the present application provides a computer readable storage medium having instructions stored therein that, when executed on a computer, cause the computer to perform the above method.
  • Yet another aspect of the present application provides a computer program product comprising instructions that, when executed on a computer, cause the computer to perform the above method.
  • Yet another aspect of the present application provides a communication system comprising: an access and mobility management function network element for performing the method of claim 1 or 2.
  • a further aspect of the present application provides a communication system comprising: a unified data management network element for performing the method of any one of claims 3 to 10; and for performing any one of claims 11 to The access and mobility management function network element of the method.
  • a further aspect of the present application provides a communication system comprising: an access and mobility management function network element for performing the method of any one of claims 15 to 21.
  • the system further comprises: a terminal device for performing the method according to claim 22 or 23.
  • a further aspect of the present application provides a communication system comprising: an access and mobility management function network element for performing the method of any one of claims 31 to 34.
  • the system further comprises: a terminal device for performing the method according to any one of claims 35 to 38.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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Abstract

本申请提供了一种通信方法,包括:第一公共陆地移动网络内的接入和移动性管理功能网元从终端设备接收注册请求消息;在确定满足第一条件的情况下,向终端设备发送第一公共陆地移动网络的配置的网络切片选择辅助信息。第一条件包括以下任一:注册请求消息为初始注册请求消息,或者,注册请求消息为终端设备从第二公共陆地移动网络移动至第一公共陆地移动网络后发送的。根据本申请的方案,可提高终端设备的用户体验也节省了网络资源。

Description

通信方法、装置和系统
本申请要求于2018年5月18日提交中国国家知识产权局、申请号为CN 201810483383.0、申请名称为“通信方法、装置和系统”的中国专利申请的优先权,其要求于2018年4月9日提交中国国家知识产权局、申请号为CN 201810313059.4、申请名称为“通信方法、装置和系统”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域,更具体地,涉及通信方法、装置和系统。
背景技术
随着技术的发展,越来越多的设备将接入移动网络。不同的设备的应用场景可能是不同的。不同类型的应用场景对网络的功能、性能有不同的需求,对传统以人为中心的单一网络进行融合和优化已经不能满足需求。同时,不同场景网络的优化和需求差异可能较大,比如一些场景需要提供超低时延、高可靠性的服务,另一些场景要求海量连接但数据量比较小的服务,还有一些场景则要求高带宽、大数据量的服务。如果每一种场景都建设专网,会增加运营商建网和运营的成本,造成资源浪费,因此网络切片的概念应运而生。
网络切片可以让运营商在同一网络基础设施上虚拟独立逻辑网络的方式为不同类型的应用场景提供相互隔离的网络环境,使得不同类型的应用场景可以按照各自的需求定制网络功能和特性,能够切实保障不同业务的需求。
在核心网部署了网络切片的情况下,终端设备会为每个公共陆地移动网络(Public Land Mobile Network,PLMN)保存一个配置的网络切片选择辅助信息(Configured Network Slicing Selection Assistance Information,Configured NSSAI)。当终端设备注册到网络时,网络切片的选择过程就会被触发。例如,终端设备会根据请求注册的或已经注册的PLMN的配置的网络切片选择辅助信息生成请求的网络切片选择辅助信息(Requested NSSAI),并将该请求的网络切片选择辅助信息发送至向网络设备。网络设备会将允许的网络切片选择辅助信息(Allowed NSSAI)反馈给该终端设备。该终端设备所接入的无线接入网络设备(Radio Access Network,RAN)可以利用该允许的网络切片选择辅助信息进行网络切片的选择过程。
该PLMN的配置的网络切片选择辅助信息可能会发生更新,或者该终端设备保存的配置的网络切片选择辅助信息与该终端设备所在的公共陆地移动网络的配置网络切片辅助信息不同。但是,在某些场景下,网络设备可能无法将更新后的配置的网络切片选择辅助信息发送给该终端设备。这样,该终端设备确定的请求的网络切片选择辅助信息所对应的网络切片可能会与该网络设备能够提供的网络切片不一致,既可能导 致终端设备不请求本可以使用的网络切片,降低了用户体验;也可能导致终端设备请求使用不可用的网络切片,浪费了信令交互。因此,如何保证网络设备能够将更新后的配置的网络切片选择辅助信息发送给该终端设备是一个亟待解决的问题。
发明内容
本申请提供一种通信方法、装置和系统。
第一方面,本申请提供了一种通信方法,包括:第一公共陆地移动网络内的接入和移动性管理功能网元从终端设备接收注册请求消息;在确定满足第一条件的情况下,向终端设备发送第一公共陆地移动网络的配置的网络切片选择辅助信息。第一条件包括以下任一:注册请求消息为初始注册请求消息,或者,注册请求消息为终端设备从第二公共陆地移动网络移动至第一公共陆地移动网络后发送的。
根据上述方法,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
在一种可能的设计中,第一条件还包括:接入和移动性管理功能网元从统一数据管理网元获取终端设备的签约信息。因此,可以避免该终端设备在短时间内反复注册到该AMF时,该AMF反复给该终端设备发送所述第一PLMN的配置的网络切片选择辅助信息,从而进一步避免了网络信令的浪费,节省了网络资源。
第二方面,本申请提供了一种通信方法,包括:统一数据管理网元从第一公共陆地移动网络内的第一接入和移动性管理功能网元接收终端设备的签约信息获取请求。第一接入和移动性管理功能网元是为终端设备提供服务的接入和移动性管理功能网元。统一数据管理网元向第一接入和移动性管理功能网元发送终端设备的签约信息。终端设备的签约信息至少包括终端设备的签约网络切片选择辅助信息。统一数据管理网元指示第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新。第一配置的网络切片选择辅助信息是终端设备的第一公共陆地移动网络的配置的网络切片选择辅助信息。
根据上述方法,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
在一种可能的设计中,统一数据管理网元指示第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新,包括:统一数据管理网元向第一接入和移动性管理功能网元发送第一指示信息,第一指示信息用于指示第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新。或者,统一数据管理网元 向第一接入和移动性管理功能网元发送终端设备的签约修改通知消息,终端设备的签约修改通知消息包括终端设备的签约网络切片选择辅助信息。
在一种可能的设计中,该方法还包括:统一数据管理网元向第一接入和移动性管理功能网元发送订阅请求,订阅请求用于请求第一接入和移动性管理功能网元在第一配置的网络切片选择辅助信息更新完成后向统一数据管理网元发送通知消息;统一数据管理网元从第一接入和移动性管理功能网元接收通知消息。因此,可以保证该UDM所维护的PLMN的指示标识与终端设备的PLMN的配置的网络切片选择辅助信息的实际更新结果是相同的。
在一种可能的设计中,在统一数据管理网元指示第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新之后,统一数据管理网元确定不需要发起第一配置的网络切片选择辅助信息的更新。或者,统一数据管理网元从第一接入和移动性管理功能网元接收通知消息后,统一数据管理网元确定不需要发起第一配置的网络切片选择辅助信息的更新。
在一种可能的设计中,在统一数据管理网元指示第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新之前,方法还包括:统一数据管理网元确定终端的一个或多个公共陆地移动网络的配置的网络切片选择辅助信息需要更新,一个或多个公共陆地移动网络包括第一公共陆地移动网络。例如,统一数据管理网元在确定终端的签约信息发生变化的情况下,确定终端的一个或多个公共陆地移动网络的配置的网络切片选择辅助信息需要更新。
第三方面,本申请提供了一种通信方法,包括:第一公共陆地移动网络内的第一接入和移动性管理功能网元向统一数据管理网元发送终端设备的签约信息获取请求,其中,第一接入和移动性管理功能网元是为终端设备提供服务的接入和移动性管理功能网元;第一接入和移动性管理功能网元从统一数据管理网元接收终端设备的签约信息,终端设备的签约信息至少包括终端设备的签约网络切片选择辅助信息;第一接入和移动性管理功能网元根据统一数据管理网元的指示发起第一配置的网络切片选择辅助信息的更新,其中第一配置的网络切片选择辅助信息为终端设备的第一公共陆地移动网络的配置的网络切片选择辅助信息。
根据上述方法,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
在一种可能的设计中,第一接入和移动性管理功能网元根据统一数据管理网元的指示发起第一配置的网络切片选择辅助信息的更新,包括:第一接入和移动性管理功能网元在从统一数据管理网元接收到第一指示信息的情况下,基于签约网络切片选择辅助信息,发起第一配置的网络切片选择辅助信息的更新。或者,第一接入和移动性管理功能网元在从统一数据管理网元接收到终端设备的签约修改通知消息的情况下,基于终端设备的签约修改通知消息包括的终端设备的签约网络切片选择辅助信息,发 起第一配置的网络切片选择辅助信息的更新。
在一种可能的设计中,方法包括:第一接入和移动性管理功能网元从统一数据管理网元接收订阅请求,订阅请求用于请求第一接入和移动性管理功能网元在第一配置的网络切片选择辅助信息更新完成后向统一数据管理网元发送通知消息;第一接入和移动性管理功能网元在从终端设备接收到配置更新完成消息后,向统一数据管理网元发送通知消息,其中,配置更新完成消息用于指示终端设备完成第一配置的网络切片选择辅助信息的更新。因此,可以保证该UDM所维护的PLMN的指示标识与终端设备的PLMN的配置的网络切片选择辅助信息的实际更新结果是相同的。
第四方面,本申请提供了一种通信方法,包括:接入和移动性管理功能网元获取终端设备的签约网络切片选择辅助信息;获取终端设备的第一配置的网络切片选择辅助信息,第一配置的网络切片选择辅助信息为终端设备请求注册的第一公共陆地移动网络的配置的网络切片选择辅助信息;根据签约网络切片选择辅助信息确定第一配置的网络切片选择辅助信息是否需要更新;若接入和移动性管理功能网元确定第一配置的网络切片选择辅助信息需要更新,则基于签约网络切片选择辅助信息确定第二配置的网络切片选择辅助信息,将第二配置的网络切片选择辅助信息发送至终端设备。
在一种可能的设计中,接入和移动性管理功能网元获取终端设备的第一配置的网络切片选择辅助信息,包括:接入和移动性管理功能网元从终端设备接收注册请求消息,注册请求消息包括第一配置的网络切片选择辅助信息。例如,注册请求消息为初始注册请求消息,或者,注册请求消息为终端设备从第二公共陆地移动网络移动至第一公共陆地移动网络后发送的。或者,接入和移动性管理功能网元获取终端设备的上下文,终端设备的上下文包括第一配置的网络切片选择辅助信息。
在一种可能的设计中,接入和移动性管理功能网元根据签约网络切片选择辅助信息确定是否要发起第一配置的网络切片选择辅助信息的更新,包括:接入和移动性管理功能网元确定第一配置的网络切片选择辅助信息与签约网络切片选择辅助信息是否相同,若第一配置的网络切片选择辅助信息与签约网络切片选择辅助信息不相同,则确定第一配置的网络切片选择辅助信息需要更新为第二配置的网络切片选择辅助信息;其中,第二配置的网络切片选择辅助信息包括的单网络切片选择辅助信息与签约网络切片选择辅助信息相同。
在一种可能的设计中,第一配置的网络切片选择辅助信息为终端设备的拜访地公共陆地网络的配置的网络切片选择辅助信息,接入和移动性管理功能网元根据签约网络切片选择辅助信息确定第一配置的网络切片选择辅助信息是否需要更新,包括:接入和移动性管理功能网元基于第一配置的网络切片选择辅助信息、第一配置的网络切片选择辅助信息与终端设备的归属公共陆地网络的配置的网络切片选择辅助信息的映射关系,以及签约网络切片选择辅助信息,确定第一配置的网络切片选择辅助信息是否需要更新。
在一种可能的设计中,方法还包括:接入和移动性管理功能网元将第二配置的网络切片选择辅助信息保存在终端设备的上下文中。这样以便当该终端设备注册到其它AMF时,其它AMF可以直接从该终端设备的上下文中获取该第二配置的网络切片选择辅助信息。
第五方面,本申请提供了一种通信方法,包括:终端设备向接入和移动性管理功能网元发送注册请求消息,注册请求消息包括终端设备的第一配置的网络切片选择辅助信息,第一配置的网络切片选择辅助信息为终端设备请求注册的第一公共陆地移动网络的配置的网络切片选择辅助信息;获取第一公共陆地移动网络的第二配置的网络切片选择辅助信息。
根据上述方法,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
在一种可能的设计中,注册请求消息为初始注册请求消息,或者,注册请求消息为终端设备从第二公共陆地移动网络移动至第一公共陆地移动网络后发送的。
第六方面,本申请提供了一种通信方法,包括:终端设备接收更新的用户路由选择策略;确定未记录向接入和移动性管理功能网元发送更新指示信息;向该接入和移动性管理功能网元发送更新指示信息,该更新指示信息用于指示该接入和移动性管理功能网元向该终端设备发送更新的配置网络切片选择辅助信息,其中该接入和移动性管理功能网元位于拜访地公共陆地移动网络;记录已经向拜访地PLMN发送该更新指示信息。
根据上述方法,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
第七方面,本申请实施例还提供一种通信方法,包括:第一网络的接入和移动性管理功能网元获取与第一网络关联的终端设备的第一配置网络切片选择辅助信息;向终端设备发送第一配置网络切片选择辅助信息和指示信息,指示信息用于指示终端设备删除与除第一网络之外的其他网络关联的第二配置网络切片选择辅助信息。
因此,当终端设备下次注册到其他网络的时候,由于终端设备没有存储该网络对应的配置网络切片选择辅助信息,终端设备不会在注册请求中携带请求的网络切片选择辅助信息,故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该网络的配置网络切片选择辅助信息。因此,该网络的配置网络切片选择辅助信息能够得到及时的更新,从而提高终端设备的用户体验也节省了网络资源。
在一种可能的设计中,指示信息还用于指示终端设备删除与其他网络关联的允许网络切片选择辅助信息。因此,当终端设备下次注册到其他网络的时候,由于终端设备也没有存储该网络对应的允许的网络切片选择辅助信息,终端设备不能根据允许的网络切片选择辅助信息确定请求的网络切片选择辅助信息,从而不会在注册请求中携 带请求的网络切片选择辅助信息,故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该网络的配置网络切片选择辅助信息。因此,进一步保证了该网络的配置网络切片选择辅助信息能够得到及时的更新。
在一种可能的设计中,第一网络的接入和移动性管理功能网元获取与第一网络关联的终端设备的第一配置网络切片选择辅助信息,包括:接入和移动性管理功能网元从数据管理网元接收与第一网络关联的终端设备的更新的签约网络切片选择辅助信息;根据更新的签约网络切片选择辅助信息,获取第一配置网络切片选择辅助信息。接入和移动性管理功能网元确定所述第一配置网络切片选择辅助信息是基于所述更新的签约网络切片选择辅助信息获取的,向所述终端设备发送所述指示信息。也就是说,该方法可适用于终端数据的签约数据修改导致当前PLMN的终端设备的配置NSSAI发生变化的场景。
在一种可能的设计中,接入和移动性管理功能网元向终端设备发送第一配置网络切片选择辅助信息和指示信息,包括:接入和移动性管理功能网元向终端设备发送用户设备配置更新命令,用户设备配置更新命令包括第一配置网络切片选择辅助信息和指示信息;或,接入和移动性管理功能网元向终端设备发送注册接受消息,注册接受消息包括第一配置网络切片选择辅助信息和指示信息。
第八方面,本申请实施例还提供一种通信方法,包括:终端设备从第一网络的接入和移动性管理功能网元接收对应第一网络的终端设备的第一配置网络切片选择辅助信息;删除与除第一网络外的其他网络关联的第二配置网络切片选择辅助信息;将存储的与第一网络关联的第三配置网络切片选择辅助信息替换为第一配置网络切片选择辅助信息。
因此,由于终端设备删除了与除第一网络外的其他网络关联的第二配置网络切片选择辅助信息,当终端设备下次注册到其他网络的时候,由于终端设备没有存储该网络对应的配置网络切片选择辅助信息,终端设备不会在注册请求中携带请求的网络切片选择辅助信息,故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该网络的配置网络切片选择辅助信息。因此,该网络的配置网络切片选择辅助信息能够得到及时的更新,从而提高终端设备的用户体验也节省了网络资源。
在一种可能的设计中,该方法还包括:终端设备从接入和移动性管理功能网元接收指示信息,指示信息用于指示终端设备删除第二配置网络切片选择辅助信息。
在一种可能的设计中,该方法还包括:终端设备删除与其他网络关联的允许网络切片选择辅助信息。例如,终端设备从接入和移动性管理功能网元接收指示信息,指示信息用于指示终端设备删除第二配置网络切片选择辅助信息和允许网络切片选择辅助信息。因此,当终端设备下次注册到其他网络的时候,由于终端设备也没有存储该网络对应的允许的网络切片选择辅助信息,终端设备不能根据允许的网络切片选择辅助信息确定请求的网络切片选择辅助信息,从而不会在注册请求中携带请求的网络切片选择辅助信息,故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该网络的配置网络切片选择辅助信息。因此,进一步保证了该网络的配置网络切片选择辅助信息能够得到及时的更新。
第九方面,本申请实施例还提供一种通信装置,该通信装置包括用于实现第一方面或第一方面的任一种可能的实现方式的单元、或包括用于实现第二方面或第二方面的任一种可能的实现方式的单元、或包括用于实现第三方面或第三方面的任一种可能的实现方式的单元、或包括用于实现第四方面或第四方面的任一种可能的实现方式的单元、或包括用于实现第五方面或第五方面的任一种可能的实现方式的单元、或包括用于实现第六方面或第六方面的任一种可能的实现方式的单元、或包括用于实现第七方面或第七方面的任一种可能的实现方式的单元、或包括用于实现第八方面或第八六方面的任一种可能的实现方式的单元。
第十方面,本申请实施例提供一种通信装置,该通信装置包括:存储器,用于存储程序;处理器,用于执行所述存储器存储的所述程序,当所述程序被执行时,所述处理器用于执行第一方面或第一方面的任一种可能的实现方式所述的方法、或用于执行第二方面或第二方面的任一种可能的实现方式所述的方法、或用于执行第三方面或第三方面的任一种可能的实现方式所述的方法、或用于执行第四方面或第四方面的任一种可能的实现方式所述的方法、或用于执行第五方面或第五方面的任一种可能的实现方式所述的方法、或用于执行实现第六方面或第六方面的任一种可能的实现方式所述的方法、或用于执行实现第七方面或第七方面的任一种可能的实现方式所述的方法、或用于执行实现第八方面或第八方面的任一种可能的实现方式所述的方法。可选的,该交换设备为芯片或集成电路。
第十一方面,本申请实施例提供了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,当所述指令在计算机上运行时,使得计算机执行上述各个方面所述的方法。
第十二方面,本申请实施例提供了一种包含指令的计算机程序产品,当该计算机程序产品在计算机上运行时,使得计算机执行上述各方面所述的方法。
附图说明
图1是一种系统的结构框图。
图2是根据本申请实施例提供的一种通信方法的示意性流程图。
图3是根据本申请实施例提供的另一通信方法的示意性流程图。
图4是根据本申请实施例提供的另一通信方法的示意性流程图。
图5是根据本申请实施例提供的另一通信方法的示意性流程图。
图6是根据本申请实施例提供的另一通信方法的示意性流程图。
图7是根据本申请实施例提供的另一种通信方法的示意性流程图。
图8A至图8H分别是根据本申请实施例提供的一种通信装置的结构示意图。
图9是根据本申请实施例提供的一种通信装置的结构示意图。
图10是根据本申请实施例提供的又一通信方法的示意性流程图。
图11是根据本申请实施例提供的又一通信方法的示意性流程图。
图12是根据本申请实施例提供的又一通信方法的示意性流程图。
图13是根据本申请实施例提供的又一种通信方法的示意性流程图。
具体实施方式
下面将结合附图,对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统,例如:全球移动通讯(Global System of Mobile communication,GSM)系统、码分多址(Code Division Multiple Access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long Term Evolution,LTE)系统、LTE频分双工(Frequency Division Duplex,FDD)系统、LTE时分双工(Time Division Duplex,TDD)、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access,WiMAX)通信系统、未来的第五代(5th Generation,5G)系统或新无线(New Radio,NR)等。
本申请实施例中的终端设备可以指用户设备、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、无线本地环路(Wireless Local Loop,WLL)站、个人数字处理(Personal Digital Assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备,未来5G网络中的终端设备或者未来演进的公用陆地移动网络(Public Land Mobile Network,PLMN)中的终端设备等,本申请实施例对此并不限定。
在核心网部署了网络切片的情况下,如果用户初始附着到网络,则触发网络切片的选择过程。网络切片的选择过程取决于用户的签约数据、本地配置信息、漫游协议、运营商的策略等等。在网络切片的选择过程中,可以综合考虑上述参数,才能为终端设备选择最佳的网络切片类型。为了给终端设备选择最佳的网络切片类型,第三代合作伙伴计划(3 rd Generation Partnership Project,3GPP)定义了几种不同的网络切片选择辅助信息(Network Slice Selection Assistance information,NSSAI)。
在终端设备需要接入到某个网络切片时,该终端设备可以提供Requested NSSAI给核心网,用于核心网为该终端设备选择网络切片实例。例如,该终端设备可以向网络提供由一组参数组成的NSSAI,为该终端设备选择网络切片实例。NSSAI可以是标准化的值或PLMN内的特定值。NSSAI可以是单网络切片选择辅助信息(Single Network Slice Selection Assistance Information,S-NSSAI)的集合,每个S-NSSAI用于标识网络切片类型。该终端设备可以存储每个PLMN下的Configured NSSAI和/或Allowed NSSAI。Configured NSSAI在该终端设备与PLMN的交互之前配置在该终端设备中。Configured NSSAI用来构造该终端设备在该PLMN中初始入网时需要使用的Requested NSSAI。网络侧会基于Requested NSSAI为该终端设备确定合适的网络切片类型和服务接入和移动性管理功能(Access and Mobility Management Function,AMF)。本申请实施例中将终端设备的签约网络切片选择辅助信息称为该终端设备的Subscribed S-NSSAIs,包括一个或多个签约的单网络切片选择辅助信息(Subscribed S-NSSAI)。当该终端设备的Subscribed S-NSSAIs变化时,可能会触发该终端设备的各PLMN的Configured NSSAI发生更新。
为了更好地理解本申请的技术方案,首先将对应用本申请的系统进行介绍。
图1是一种系统的结构框图。如图1所示的系统100包括终端设备110、接入和移动性管理功能(Access and Mobility Management Function,AMF)网元120和统一数据管理(Unified Data Management,UDM)网元130。
接入和移动性管理功能网元120负责终端设备的移动性管理。例如,移动性管理功能120可以管理用户的移动状态,分配用户临时身份标识。此外,移动性管理功能120还可以认证和授权用户。
统一数据管理网元130负责管理终端设备的签约数据。当签约数据修改时,统一数据管理130负责通知相应的网元。
接入和移动性管理功能和统一数据管理既可以由指定的硬件实现、或者,也可以由在指定硬件上的软件实例实现、或者,也可以由在合适的平台上实例化的虚拟功能来实现,本发明并不在此限制。
为了便于描述,以下实施例中,以AMF作为接入和移动性管理功能网元的简称,以UDM作为统一数据管理网元的简称。
图1所示的系统结构框图仅示出了系统中与本申请技术方案相关的网元。本领域技术人员可以理解,图1所示的系统100中还应包括用于实现无线通信的其他网元。例如,无线接入网(Radio Access Network,RAN)设备、会话管理功能(Session Management Function,SMF)网元等。
图2是根据本申请实施例提供的一种通信方法的示意性流程图。
201,第一公共陆地移动网络(Public Land Mobile Network,PLMN)内的AMF从终端设备接收注册请求消息。
该AMF是该终端设备的服务AMF。例如,该AMF接收RAN设备转发的终端设备的注册请求消息。
202,该AMF在确定满足第一条件的情况下,向该终端设备发送该第一PLMN的配置的网络切片选择辅助信息(Configured NSSAI),其中,该第一条件包括以下任一:该注册请求消息为初始注册(initial registration)请求消息,或者,该注册请求消息为该终端设备从第二PLMN移动至该第一PLMN后发送的。
例如,当该终端设备开机后或者去注册后重新注册到网络,该终端设备向AMF发送初始注册请求消息,请求注册到网络。例如,初始注册请求消息可以是注册类型为初始注册的注册请求消息。
该AMF可以根据该终端设备发送的注册请求消息中携带的5G全球唯一临时标识(5G Globally Unique Temporary Identifier,5G GUTI)确定出该终端设备是从该第二PLMN移动至该第一PLMN。具体的,5G GUTI包括移动国家码(Mobile Country Code,MCC)和移动网络码(Mobile Network Code,MNC),MCC和MNC组成一个PLMN ID,该AMF可以从该5G GUTI中获取该PLMN ID,该PLMN ID是为该UE服务的上一个AMF所在的PLMN的PLMN ID。此外,在该终端设备从该第二PLMN移动至该第一PLMN的情况下,该终端设备向AMF发送的注册请求消息中携带的注册类型为移动性注册更新(mobility registration update)。因此,向所述终端设备发送该第一 PLMN的配置的网络切片选择辅助信息的条件也可以理解为:注册请求消息中携带的注册类型为移动性注册更新。
在一些情况下,可能出现终端设备在去注册状态(RM-DEREGISTERED)下,终端设备的Subscribed S-NSSAIs发生了变化,而终端设备的Subscribed S-NSSAIs发生变化可能会导致该终端设备的各PLMN的Configured NSSAI改变。由于终端处于去注册状态,5G核心网无法将更新后的各PLMN的Configured NSSAI发送给终端,导致终端当前保存的各PLMN的Configured NSSAI无法及时更新(以下简称场景1)。利用图2所示的方法,只要该终端设备向该第一PLMN内的AMF发送的注册类型为初始注册,该第一PLMN内的AMF就将该第一PLMN的配置的网络切片选择辅助信息发送至该终端设备。这样可以保证在场景1出现的情况下,终端设备注册到该第一PLMN后,该AMF可以及时将该第一PLMN的Configured NSSAI发送至该终端设备。因此,终端设备可以及时得到该第一PLMN更新的Configured NSSAI,后续在第一PLMN接入时可以使用更新的Configured NSSAI来确定Requested NSSAI,并提供至核心网用于网络切片的选择。
举例来说,在初始时刻,终端设备的Subscribed S-NSSAIs包括S-NSSAI 1,S-NSSAI2,S-NSSAI 4,由于第一PLMN内部署有S-NSSAI 1,S-NSSAI 2,S-NSSAI 3对应的网络切片,所以终端设备在第一PLMN内的Configured NSSAI包括S-NSSAI 1,S-NSSAI2。当终端设备的Subscribed S-NSSAIs发生变化,在一个例子中,变化后的Subscribed S-NSSAIs包括S-NSSAI 1,S-NSSAI 2,S-NSSAI 3。根据现有技术的方案,终端设备在第一PLMN内的Configured NSSAI无法得到及时的更新,因此就无法使用S-NSSAI 3对应的网络切片。然而,根据本申请实施例的方案,终端设备使用的第一PLMN的Configured NSSAI可以及时得到更新。例如,更新后的第一PLMN的Configured NSSAI包括S-NSSAI 1,S-NSSAI 2,S-NSSAI 3。因而,终端设备就可以使用S-NSSAI 3对应的网络切片,从而提高了用户体验。
在另一个例子中,变化后的Subscribed S-NSSAIs包括S-NSSAI 1,S-NSSAI 4。根据现有技术的方案,终端设备Configured NSSAI无法得到及时的更新,因此在第一PLMN内可能会请求使用S-NSSAI 2对应的网络切片,导致网络信令的浪费。然而,根据本申请实施例的方案,终端设备使用的第一PLMN的Configured NSSAI可以及时得到更新。例如,更新后的第一PLMN的Configured NSSAI包括S-NSSAI 1。因而,终端设备就不会请求使用S-NSSAI 2对应的网络切片,避免了网络信令的浪费,节省了网络资源。在一些情况下,终端设备从第二PLMN移动至第一PLMN。如果在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化,而终端设备的Subscribed S-NSSAIs发生变化可能会导致该终端设备的各PLMN的Configured NSSAI改变。但由于该终端设备驻留在该第二PLMN,该AMF只会向该终端设备发送该第二PLMN的Configured NSSAI,不会发送该终端设备的第一PLMN的Configured NSSAI(简称场景2)。利用图2所示的方法中,只要该终端设备的注册类型为移动性注册更新且该终端设备是从第二PLMN移动至该第一PLMN,该AMF就可以将更新后的该第一PLMN的Configured NSSAI发送至该终端设备。类似的,图2所示的方法可以保证该终端设备使用的第一PLMN的Configured NSSAI 及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,在一些实施例中,该第一条件还包括该AMF从UDM获取该终端设备的签约信息。该UDM可以为该终端设备的归属PLMN(Home PLMN,HPLMN)内的UDM。该终端设备的签约信息可以包括该终端设备的Subscribed S-NSSAIs。也就是说,在满足上述条件的情况下,只有在AMF从UDM获取该终端设备的签约信息后,AMF才会向该终端设备发送该第一PLMN的Configured NSSAI。通过上述技术方案,可以避免该终端设备在短时间内反复注册到该AMF时,该AMF反复给该终端设备发送所述第一PLMN的配置的网络切片选择辅助信息,从而进一步避免了网络信令的浪费,节省了网络资源。
该AMF将该第一PLMN的Configured NSSAI发送给该终端设备,即上述步骤202,可以包括:该AMF将该第一PLMN的Configured NSSAI携带在注册接受消息中发送给该终端设备,或该AMF通过用户设备(User Equipment,UE)配置更新命令(UE Configuration Update Command)将该Configured NSSAI发送给该终端设备。
图3是根据本申请实施例提供的另一通信方法的示意性流程图。
301,UDM从第一PLMN的第一AMF接收终端设备的签约信息获取请求,其中该第一AMF是为该终端设备提供服务的AMF。
该UDM为该终端设备的归属PLMN内的UDM。
302,该UDM向该第一AMF发送该终端设备的签约信息,该签约信息至少包括该终端设备的Subscribed S-NSSAIs。
303,该UDM指示该第一AMF发起第一配置的网络切片选择辅助信息的更新,其中该第一配置的网络切片选择辅助信息是该终端设备的第一PLMN的配置的网络切片选择辅助信息。
304,该第一AMF根据该UDM的指示发起该第一配置的网络切片选择辅助信息的更新。
根据图3所示的方法,该UDM可以在将终端设备的Subscribed S-NSSAIs发送至为该终端设备提供服务的AMF的时候,指示该AMF发起该配置的网络切片选择辅助信息的更新。这样,该AMF可以根据该UDM的指示发起配置的网络切片选择辅助信息的更新。
可选的,在一些实施例中,该UDM指示该第一AMF发起第一配置的网络切片选择辅助信息的更新,包括:该UDM向该第一AMF发送第一指示信息,该第一指示信息用于指示该第一AMF发起该第一配置的网络切片选择辅助信息的更新。在此情况下,该第一AMF在从该UDM接收到第一指示信息的情况下,基于该终端设备的签约信息包括的该终端设备的Subscribed S-NSSAIs,发起该第一配置的网络切片选择辅助信息的更新。上述技术方案中,该UDM通过显示指示的方式指示该第一AMF发起该第一配置的网络切片选择辅助信息的更新。这将结合图4做进一步描述。可选的,第一指示信息可通过隐式的方式指示该第一AMF发起该第一配置的网络切片选择辅助信息的更新。例如,该第一指示信息用于指示终端设备的Subscribed S-NSSAIs发生了更新。在此情况下,该第一AMF在从该UDM接收到第一指示信息的情况下,基于该 终端设备的签约信息包括的该终端设备的Subscribed S-NSSAIs,确定发起该第一配置的网络切片选择辅助信息的更新。这将结合图10做进一步描述。
可选的,在另一些实施例中,该UDM指示该第一AMF发起第一配置的网络切片选择辅助信息的更新,包括:该UDM向该第一AMF发送该终端设备的签约修改通知消息,该终端设备的签约修改通知消息包括该终端设备的Subscribed S-NSSAIs。在此情况下,该第一AMF在从该UDM接收到该终端设备的签约修改通知消息的情况下,基于该终端设备的签约修改通知消息包括的该终端设备的Subscribed S-NSSAIs,发起该第一配置的网络切片选择辅助信息的更新。这将结合图5做进一步描述。
可选的,在一些实施例中,该UDM还可以向该第一AMF发送订阅请求,该订阅请求用于请求该第一AMF在该第一配置的网络切片选择辅助信息更新完成后,向该UDM发送通知消息。第一AMF收到订阅请求后,在从所述终端设备接收到配置更新完成消息后,向UDM发送所述通知消息,其中,所述配置更新完成消息用于指示所述终端设备完成所述第一配置的网络切片选择辅助信息的更新。相应的,该UDM可以从该第一AMF接收该通知消息。通过上述技术方案,使得该UDM可以确定该第一配置的网络切片选择辅助信息是否已经完成更新。
可选的,在一些实施例中,在该UDM指示该第一AMF发起第一配置的网络切片选择辅助信息的更新之前,该UDM还可以确定该终端设备的一个或多个PLMN的配置的网络切片选择辅助信息需要更新,该一个或多个PLMN包括该第一PLMN。该一个或多个PLMN是该终端设备能够注册的PLMN。例如,UDM可以在确定所述终端的签约信息发生变化的情况下,确定该终端设备的一个或多个PLMN的配置的网络切片选择辅助信息需要更新。
可选的,在一些实施例中,该一个或多个PLMN包括第二PLMN。在此情况下,该UDM可以记录需要发起该第一配置的网络切片选择辅助信息的更新。该UDM还可以记录需要发起第二配置的网络切片选择辅助信息的更新,其中该第二配置的网络切片选择辅助信息为该终端设备的第二公共陆地移动网络的配置的网络切片选择辅助信息。
可选的,在一些实施例中,该UDM从该第一AMF接收到用于指示该第一配置的网络切片选择辅助信息更新已经完成的通知消息后,可以记录不需要发起该第一配置的网络切片选择辅助信息的更新。或者,在UDM指示第一AMF发起该第一配置的网络切片选择辅助信息更新后,UDM就可以记录不需要发起该第一配置的网络切片选择辅助信息的更新。由此,可准确维护各PLMN配置的网络切片选择辅助信息的更新情况,优化网络管理。
在步骤304后,若该UDM再次从该第一AMF接收到该终端设备的签约信息获取请求且该UDM确认该终端设备的第一PLMN的配置的网络切片选择辅助信息不需要更新。在此情况下,该UDM对于是否发起该第一配置的网络切片选择辅助信息的更新的记录不会发生变化。因此。在此情况下,该UDM可以指示该第一AMF不需要发起该第一配置的网络切片选择辅助信息的更新。该UDM可以通过显示指示的方式指示该第一AMF不需要发起该第一配置的网络切片选择辅助信息的更新。例如,该UDM可以向该第一AMF发送第二指示信息,该第二指示信息用于指示该第一AMF不发起 该第一配置的网络切片选择辅助信息的更新。该UDM也可以通过隐式指示的方式指示该第一AMF不需要发起该第一配置的网络切片选择辅助信息的更新。例如,该UDM不向该第一AMF发送用于指示第一AMF发起该第一配置的网络切片选择辅助信息的更新的信息(例如该第一指示信息或该终端设备的签约修改通知消息)。
图4是根据本申请实施例提供的另一通信方法的示意性流程图。
401,UDM确定该终端设备的一个或多个PLMN的配置的网络切片选择辅助信息需要更新。
该一个或多个PLMN中包括第一PLMN。该UDM是该终端设备的归属PLMN中的UDM。
可选的,该UDM可以确定该终端设备的Subscribed S-NSSAIs发生变化,再进一步确定该终端设备的一个或多个PLMN的配置的网络切片选择辅助信息需要更新。
402,该UDM为该一个或多个PLMN中的每个PLMN生成一个第一类标识。
例如,该第一类标识用于指示该每个或多个PLMN内的AMF需要发起该每个PLMN的配置的网络切片选择辅助信息的更新。为了便于描述,该每个或多个PLMN的第一类标识可以称为第一指示信息。该第一指示信息用于指示该第一PLMN内的第一AMF需要发起第一配置的网络切片选择辅助信息的更新。该第一配置的网络切片选择辅助信息是该终端设备的该第一PLMN的配置的网络切片选择辅助信息。换句话说,步骤402可以包括:该UDM生成第一指示信息。该第一指示信息用于指示第一AMF需要发起第一配置的网络切片选择辅助信息的更新。
假设该一个或多个PLMN中还包括第二PLMN,该第二PLMN内的AMF为第二AMF。该第二PLMN的第一类标识可以称为第三指示信息。该第三指示信息用于指示该第二AMF需要发起第二配置的网络切片选择辅助信息的更新。该第二配置的网络切片选择辅助信息是该终端设备的该第二PLMN的配置的网络切片选择辅助信息。这里所称的该终端设备的第一PLMN的配置的网络切片选择辅助信息是指该终端设备所保存的该第一PLMN的配置网络切片选择信息。类似的,该终端设备的第二PLMN的配置的网络切片选择辅助信息是指该终端设备所保存的第二PLMN的配置的网络切片选择辅助信息。
403,该UDM记录需要向该一个或多个PLMN发送该第一类标识。
该UDM可以通过多种方式记录是否需要向该一个或多个PLMN发送该第一类标识。
例如,在一些实施例中,该UDM维护两类标识:第一类标识和第二类标识。例如,该UDM可以直接保存每个PLMN的标识。每个PLMN的标识为该第一类标识或该第二类标识。若一个PLMN标识为的第一类标识,则需要向该PLMN内的AMF发送该第一类标识。若一个PLMN的标识为第二类标识,则需要向该PLMN内的AMF发送该第二类标识。该第二类标识用于指示不需要该PLMN内的AMF发起该PLMN的配置的网络切片选择辅助信息的更新。举例来说,UDM可为第一类标识和第二类标识设置不同的数值或不同的标识位。
又如,在一些实施例中,该UDM可以维护一类标识:第一类标识。例如,该UDM 可以保存每个PLMN的标识,每个PLMN的标识为该第一类标识或者没有标识。若一个PLMN标识为第一类标识,则需要向该PLMN内的AMF发送该第一类标识。若一个PLMN不存在标识,则不需要向该PLMN内的AMF发送任何标识或者发送第二类标识。该第二类标识用于指示不需要该PLMN内的AMF发起该PLMN的配置的网络切片选择辅助信息的更新。
又如,在一些实施例中,该UDM可以维护两个列表:列表1和列表2。在该UDM确认需要向一个或多个PLMN发送该第一类标识的情况下,该UDM可以将该一个或多个PLMN的身份信息保存在列表1中,该身份信息可以是PLMN ID。在该UDM确认不需要向某个PLMN发送该第一类标识的情况下,该UDM可以将该PLMN的身份信息从列表1中删除并在列表2中保存该PLMN的身份信息。
又如,在一些实施例中,该UDM可以维护一个列表。当该UDM确认需要向一个或多个PLMN发送该第一类标识的情况下,该UDM可以将该一个或多个PLMN的身份信息保存在该列表中。当该UDM确认不需要向某个PLMN发送该第一类标识的情况下,该UDM可以将该PLMN的身份信息从该列表中删除。
除了上述记录是否需要向该一个或多个PLMN发送该第一类标识,还可以通过其他方式记录是否需要向一个或多个PLMN发送该第一类标识。本申请实施例对记录是否需要向该一个或多个PLMN发送该第一类标识的具体方式并不限定。。
404,终端设备根据配置的网络切片选择辅助信息,生成请求的网络切片选择辅助信息(Requested NSSAI),在向某个PLMN注册时发送携带该请求的网络切片选择辅助信息的注册请求消息。
例如,该终端设备可以保存至少一个PLMN的配置的网络切片选择辅助信息,用于生成该请求的网络切片选择辅助信息的配置的网络切片选择辅助信息是该终端设备将要注册的PLMN的配置的网络切片选择辅助信息。
可选的,在一些实施例中,该请求的网络切片选择辅助信息可以是该配置的网络切片选择辅助信息的子集。在另一些实施例中,该请求的网络切片选择辅助信息也可以与该配置的网络切片选择辅助信息相同。
例如,终端设备向RAN设备发送上述注册请求消息,RAN设备选择合适的AMF。
405,该第一AMF获取该请求的网络切片选择辅助信息。
该第一PLMN是该终端设备申请注册的PLMN。该第一AMF是该终端设备的服务AMF。例如,该第一AMF可以是上述RAN设备选择的AMF,或者,RAN设备选择了第二AMF网元,第二AMF网元收到注册请求消息后将其转发至能够为终端设备服务的第一AMF。
406,该第一AMF向该UDM发送该终端设备的签约信息获取请求。
例如,第一AMF可以向UDM发送请求来调用获取终端设备的签约信息的服务。
407,该UDM根据所记录的信息确定需要该第一AMF发起第一配置的网络切片选择辅助信息的更新。
例如,在步骤401至步骤403中,该UDM确定了该终端设备的第一PLMN的配置的网络切片选择辅助信息需要更新。在此情况下,该UDM记录了需要向该第一PLMN发送该第一类标识(即该第一指示信息)。
408,该UDM将该第一指示信息以及该终端设备的签约信息发送至该第一AMF。该终端设备的签约信息包括该终端设备的Subscribed S-NSSAIs。
例如,获取终端设备的签约信息的服务被调用后,UDM向第一AMF返回终端的签约信息。同时,UDM向第一AMF还发送上述第一指示信息。
409,该UDM记录该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新。
如上所述,在一些实施例中,该UDM可以维护两类标识:该第一类标识和该第二类标识。在该UDM确定该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新的情况下,该UDM可以将该第一PLMN的标识修改为该第二类标识。这样,该UDM就记录了该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新。
又如,在一些实施例中,该UDM可以维护一类标识:第一类标识。在该UDM确定该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新的情况下,该UDM可以通过清除该第一PLMN的标识。这样,该UDM就记录了该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新。
又如,在一些实施例中,该UDM可以维护两个列表:列表1和列表2。在该UDM确定该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新的情况下,该UDM可以通过将该第一PLMN的身份信息从列表1中删除,并在列表2中保存第一PLMN的身份信息。这样,该UDM就记录了该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新。
又如,在一些实施例中,该UDM可以维护一个列表。在该UDM确定该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新的情况下,该UDM可以通过将该第一PLMN的身份信息从列表1中删除。这样,该UDM就记录了该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新。
可选的,在一些实施例中,该UDM只要将该第一指示信息以及该终端设备的签约信息发送至该第一AMF,就可以记录该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新。
可选的,在一些实施例中,在步骤409之前该UDM还需要接收到该第一AMF发送的用于指示该第一配置的网络切片选择辅助信息更新已经完成的通知消息。也就是说,该UDM在确定该第一配置的网络切片选择辅助信息更新已经完成后,才记录该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新。如果该UDM没有接收到该通知消息,则步骤409不会被执行。这样,可以保证该UDM所维护的PLMN的指示标识与终端设备的PLMN的配置的网络切片选择辅助信息的实际更新结果是相同的。
进一步,可选的,在一些实施例中,该UDM还可以向该第一AMF发送订阅请求,该订阅请求用于请求该第一AMF在该第一配置的网络切片选择辅助信息更新完成后,向该UDM发送通知消息。也就是说,该UDM可以通过发送订阅请求来指示该第一AMF是否向该UDM发送该通知消息。可选的,在另一些实施例中,该第一AMF可以默认在该第一配置的网络切片选择辅助信息更新完成后,向该UDM发送通知消息。 也就是说,该第一AMF不需要从该UDM接收该订阅请求,就会向该UDM发送用于指示该第一配置的网络切片选择辅助信息更新完成的通知消息。
假设在步骤409之后,该终端设备经历关机再开机,或者,该终端设备移动后注册到该第一PLMN内的另一个AMF,或者该终端设备移动至另一PLMN然后又移动回该第一PLMN。假设在上述过程期间,该终端设备的Subscribed S-NSSAIs没有更新。换句话说,在上述过程期间,该UDM对于该第一PLMN的记录没有发生改变(即一直是该第一PLMN的AMF不需要发起该第一配置的网络切片选择辅助信息的更新)。在此情况下,该UDM在获取到该第一AMF或该第一PLMN内的另一个AMF发送的签约信息获取请求后,确定该第一AMF或该第一PLMN内的另一个AMF不需要发起该第一配置的网络切片选择辅助信息的更新。这样,该UDM可以指示该第一AMF或该第一PLMN内的另一个AMF不需要发起该第一配置的网络切片选择辅助信息的更新,或该UDM不给该第一AMF或该第一PLMN内的另一个AMF发送是否需要发起该第一配置的网络切片选择辅助信息的更新的指示信息。
假设在步骤409之后,该终端设备从该第一PLMN切换为第二PLMN。同时,假设该第二AMF成为了该终端设备的提供服务的AMF。假设在上述过程期间,该UDM所维护的该第二PLMN的记录没有发生改变(即一直是该第二PLMN的AMF需要发起该第二配置的网络切片选择辅助信息的更新)。在此情况下,该UDM在获取到该第二AMF发送的签约信息获取请求后,确定该第二AMF需要发起该第二配置的网络切片选择辅助信息的更新。这样,该UDM可以指示该第二AMF发起该第二配置的网络切片选择辅助信息的更新。
基于上述技术方案,该UDM可以根据记录确定是否需要向PLMN内的AMF发送指示AMF发起该第一配置的网络切片选择辅助信息的更新的指示信息。
可以理解的是,图4所示的方法中,步骤401至步骤403可以只是在UDM确定终端设备的PLMN的配置的网络切片选择辅助信息需要更新的时候执行。
该第一AMF发起第一配置的网络切片选择辅助信息的更新可以包括以下步骤:该AMF根据该终端设备的Subscribed S-NSSAIs更新该终端设备的该第一PLMN的配置的网络切片选择辅助信息,将更新后的该第一PLMN的Configured NSSAI发送给该终端设备。例如,第一AMF根据终端设备的Subscribed S-NSSAIs和该第一PLMN支持的网络切片对应的S-NSSAIs来更新该终端设备的该第一PLMN的配置的网络切片选择辅助信息。例如,第一AMF将Subscribed S-NSSAIs和该第一PLMN支持的网络切片对应的S-NSSAIs的交集,或该交集的子集确定为该终端设备的该第一PLMN的配置的网络切片选择辅助信息,以此实现更新。
该AMF将该更新后的该第一PLMN的Configured NSSAI携带在注册接受消息中发送给该终端设备,或该AMF通过UE配置更新命令(UE Configuration Update Command)将该更新后的该第一PLMN的Configured NSSAI发送给该终端设备。
此外,在该AMF根据该终端设备的Subscribed S-NSSAIs更新该终端设备的该第一PLMN的配置的网络切片选择辅助信息之前,AMF还可以再次判断是否需要发起更新,这样的方式可以参照图6的描述,在此就不详细描述。这里所称的该终端设备的Subscribed S-NSSAIs是步骤408中该终端设备的签约信息包括该终端设备的 Subscribed S-NSSAIs。
该终端设备在完成更新后,可以向该第一AMF发送通知消息。该通知消息用于指示该终端设备完成了该第一配置的网络切片选择辅助信息的更新。
可选的,在一些实施例中,该第一AMF向该UDM发送的用于指示该第一配置的网络切片选择辅助信息更新已经完成的通知消息可以与该第一AMF从该终端设备接收的通知消息相同。换句话说,该第一AMF可以将该通知消息透传至该UDM。
可选的,在另一些实施例中,该第一AMF在从该终端设备接收到通知消息后,可以自行确定一个用于指示该第一配置的网络切片选择辅助信息更新已经完成的通知消息。该第一AMF确定的通知消息与该第一AMF接收到的通知消息所指示的内容可以是相同的,但是具体消息的长度或者具体形式可以是不同的。例如,该终端设备向该第一AMF发送的通知消息可以是一个显示的通知消息,该第一AMF向该UDM发送的通知消息可以是一个隐式的通知消息。
图4所示的方法中,该UDM是在从该第一AMF接收到该终端设备的签约信息获取请求的情况下,再根据保存的指示标识确定是否需要该第一AMF发起该第一配置的网络切片选择辅助信息的更新。可选的,在另一些实施例中,该UDM可以在一个AMF注册成为该终端设备的服务AMF的情况下,根据记录确定是否需要指示该AMF发起对应的配置的网络切片选择辅助信息的更新。例如,该第一AMF向该UDM注册成为该终端设备的服务AMF。在此情况下,该该UDM根据记录确定需要指示该第一AMF发起第一配置的网络切片选择辅助信息的更新,并执行后续的步骤。
图5是根据本申请实施例提供的另一通信方法的示意性流程图。
501,UDM在确定该终端设备的Subscribed S-NSSAIs发生变化的情况下,确定需要向一个或多个PLMN发送该终端设备的签约修改通知消息。
该一个或多个PLMN中包括第一PLMN。该UDM是该终端设备的归属PLMN中的UDM。
502,该UDM记录需要向一个或多个PLMN发送该终端设备的签约修改通知消息。该终端设备的签约修改通知消息包括该终端设备的Subscribed S-NSSAIs。
该UDM可以通过多种方式记录是否需要向该一个或多个PLMN发送该终端设备的签约修改通知消息。
例如,在一些实施例中,该UDM可以维护两类标识:第一类标识和第二类标识。每个PLMN的标识为该第一类标识或该第二类标识。若一个PLMN标识为的第一类标识,则需要向该PLMN内的AMF发送该终端设备的签约修改通知消息。若一个PLMN的标识为第二类标识,则不需要向该PLMN内的AMF发送该UE签约修改通知消息。在该UDM确认需要向一个或多个PLMN发送该终端设备的签约修改通知消息的情况下,该UDM可以为该一个或多个PLMN中的每个PLMN生成一个第一类标识。为了便于描述,第一PLMN的第一类标识可以称为第一指示信息。假设该一个或多个PLMN中还包括第二PLMN。该UDM保存该一个或多个PLMN中的每个PLMN的第一类标识。
又如,在一些实施例中,该UDM可以维护一类标识:第一类标识。每个PLMN 的标识为该第一类标识。若一个PLMN标识为第一类标识,则需要向该PLMN内的AMF发送该终端设备的签约修改通知消息。若一个PLMN不存在标识,则不需要向该PLMN内的AMF发送该UE签约修改通知消息。在该UDM确认需要向一个或多个PLMN发送该终端设备的签约修改通知消息的情况下,该UDM可以为该一个或多个PLMN中的每个PLMN生成一个第一类标识。为了便于描述,第一PLMN的第一类标识可以称为第一指示信息。假设该一个或多个PLMN中还包括第二PLMN。该UDM保存该一个或多个PLMN中的每个PLMN的第一类标识。
在上述两种实施例中,该第一指示信息用于记录需要向该第一PLMN内的AMF发送该终端设备的签约修改通知消息。换句话说,步骤502可以包括:该UDM生成第一指示信息。该第一指示信息用于记录需要向该第一PLMN内的AMF发送该终端设备的签约修改通知消息。
又如,在一些实施例中,该UDM可以维护两个列表:列表1和列表2。在该UDM确认需要向一个或多个PLMN发送该终端设备的签约修改通知消息的情况下,该UDM可以将该一个或多个PLMN的身份信息保存在列表1中,该身份信息可以是PLMN ID。在该UDM确认不需要向某个PLMN发送该终端设备的签约变化通知消息的情况下,该UDM可以将该PLMN的身份信息从列表1中删除并在列表2中保存该PLMN的身份信息。
又如,在一些实施例中,该UDM可以维护一个列表。当该UDM确认需要向一个或多个PLMN发送该终端设备的签约修改通知消息的情况下,该UDM可以将该一个或多个PLMN的身份信息保存在该列表中。当该UDM确认不需要向某个PLMN发送该终端设备的签约修改通知消息的情况下,该UDM可以将该PLMN的身份信息从该列表中删除。
除了上述记录是否需要向该一个或多个PLMN发送该终端设备的签约变化通知消息,还可以通过其他方式记录是否需要向该一个或多个PLMN发送该终端设备的签约变化通知消息。本申请实施例对记录是否需要向该一个或多个PLMN发送该终端设备的签约变化通知消息的具体方式并不限定。
503-505与404-406相同,在此就不必赘述。
506,该UDM根据所记录的信息确定需要向所述第一AMF发送该终端设备的签约修改通知消息。
例如,在步骤501至步骤502中,该UDM确定了需要向第一PLMN的AMF发送该终端设备的签约修改通知。
507,该UDM将该终端设备的签约修改通知消息发送至该第一AMF。
508,该UDM记录不需要向该第一PLMN发送该终端设备的签约修改通知消息。
该UDM可以通过多种方式记录不需要向该第一PLMN发送该终端设备的签约修改通知消息。
如上所述,在一些实施例中,该UDM可以维护两类标识:该第一类标识和该第二类标识。在该UDM确定不需要向该第一PLMN发送该终端设备的签约修改通知消息的情况下,该UDM可以将该第一PLMN的标识修改为该第二类标识。这样,该UDM就记录了不需要向该第一PLMN发送该终端设备的签约修改通知消息。
又如,在一些实施例中,该UDM可以维护一类标识:第一类标识。在该UDM确定不需要向该第一PLMN发送该终端设备的签约修改通知消息的情况下,该UDM可以通过清除该第一PLMN的标识。这样,该UDM就记录了不需要向该第一PLMN发送该终端设备的签约修改通知消息。
又如,在一些实施例中,该UDM可以维护两个列表:列表1和列表2。在该UDM确定不需要向该第一PLMN发送该终端设备的签约修改通知消息的情况下,该UDM可以通过将该第一PLMN的身份信息从列表1中删除,并在列表2中保存第一PLMN的身份信息。这样,该UDM就记录了不需要向该第一PLMN发送该终端设备的签约修改通知消息。
又如,在一些实施例中,该UDM可以维护一个列表。在该UDM确定不需要向该第一PLMN发送该终端设备的签约修改通知消息的情况下,该UDM可以通过将该第一PLMN的身份信息从列表1中删除。这样,该UDM就记录了不需要向该第一PLMN发送该终端设备的签约修改通知消息。
可选的,在一些实施例中,该UDM只要将该终端设备的签约修改通知消息发送至该第一AMF,就可以记录不需要向该第一PLMN发送该终端设备的签约修改通知消息。
可选的,在另一些实施例中,在步骤508之前该UDM还需要接收到该第一AMF发送的用于指示该第一AMF已经完成该终端设备的第一PLMN的配置的网络切片选择辅助信息的更新的通知消息。也就是说,该UDM在确定该AMF已经完成该终端设备的第一PLMN的配置的网络切片选择辅助信息的更新后,才记录不需要向该第一PLMN发送该终端设备的签约修改通知消息。如果该UDM没有接收到该通知消息,则步骤508不会被执行。这样,可以保证该UDM所维护的PLMN的指示标识与终端设备的PLMN的配置的网络切片选择辅助信息的实际更新结果是相同的。
进一步,可选的,在一些实施例中,该UDM还可以向该第一AMF发送订阅请求,该订阅请求用于请求该第一AMF在完成该终端设备的第一PLMN的配置的网络切片选择辅助信息的更新后,向该UDM发送通知消息。也就是说,该UDM可以通过发送订阅请求来指示该第一AMF是否向该UDM发送该通知消息。可选的,在另一些实施例中,该第一AMF可以默认在完成该终端设备的第一PLMN的配置的网络切片选择辅助信息的更新后,向该UDM发送通知消息。也就是说,该第一AMF不需要从该UDM接收该订阅请求,就会向该UDM发送用于指示该终端设备的第一PLMN的配置的网络切片选择辅助信息更新已经完成的通知消息。
假设在步骤508之后,该终端设备经历关机再开机,或者,该终端设备移动后注册到该第一PLMN内的另一个AMF,或者,该终端设备移动至另一PLMN然后又移动回该第一PLMN。假设在上述过程期间,该终端设备的Subscribed S-NSSAIs没有更新。换句话说,在上述过程期间,该UDM对于该第一PLMN的记录没有发生改变(即一直是不需要向该第一PLMN发送该终端设备的签约修改通知消息)。在此情况下,该UDM在获取到该第一AMF或该第一PLMN内的另一个AMF发送的签约信息获取请求后,确定不需要向该第一AMF或该第一PLMN内的另一个AMF发送该终端设备的签约修改通知消息。假设在步骤508之后,该终端设备从该第一PLMN切换为第二 PLMN。同时,假设第二AMF成为了该终端设备的提供服务的AMF,其中该第二AMF是该第二PLMN中的AMF。假设在上述过程期间,该UDM对于该第二PLMN的记录没有发生改变(即一直是需要向该第二PLMN发送该终端设备的签约修改通知消息)。在此情况下,该UDM在获取到该第二AMF发送的签约信息获取请求后,确定需要向该第二AMF发送该终端设备的签约修改通知消息。这样,该UDM可以向该第二AMF发送该终端设备的签约修改通知消息。
基于上述技术方案,该UDM可以根据记录确定是否需要向PLMN内的AMF发送UE签约修改通知消息。
可以理解的是,图5所示的方法中,步骤501至步骤502可以只是在UDM确定该终端设备的Subscribed S-NSSAIs发生的时候执行。
上述技术方案中,该第一AMF从UDM接收终端设备的签约修改通知消息后,发起该终端设备的该第一PLMN的配置的网络切片选择辅助信息的更新。
该第一AMF如何发起该终端设备的该第一PLMN的配置的网络切片选择辅助信息的更新可以参考图5中的描述,此处不再赘述。与图5的差别在于,这里所称的该终端设备的Subscribed S-NSSAIs是步骤507中该终端设备的签约修改通知消息包括该终端设备的Subscribed S-NSSAIs。
该终端设备在完成更新后,可以向该第一AMF发送通知消息。该通知消息用于指示该终端设备完成了该第一配置的网络切片选择辅助信息的更新。
可选的,在一些实施例中,该第一AMF向该UDM发送的用于指示该第一配置的网络切片选择辅助信息更新已经完成的通知消息可以与该第一AMF从该终端设备接收的通知消息相同。换句话说,该第一AMF可以将该通知消息透传至该UDM。
可选的,在另一些实施例中,该第一AMF在从该终端设备接收到通知消息后,可以自行确定一个用于指示该第一配置的网络切片选择辅助信息更新已经完成的通知消息。该第一AMF确定的通知消息与该第一AMF接收到的通知消息所指示的内容可以是相同的,但是具体消息的长度或者具体形式可以是不同的。例如,该终端设备向该第一AMF发送的通知消息可以是一个显示的通知消息,该第一AMF向该UDM发送的通知消息可以是一个隐式的通知消息。
图5所示的方法中,该UDM是在从该第一AMF接收到该终端设备的签约信息获取请求的情况下,再根据记录确定是否需要向该第一AMF发送该终端设备的签约修改通知消息。可选的,在另一些实施例中,该UDM可以在一个AMF注册成为该终端设备的服务AMF的情况下,根据记录确定是否需要向该AMF发送该终端设备的签约修改通知消息。例如,该第一AMF向该UDM注册成为该终端设备的服务AMF。在此情况下,该UDM根据记录确定需要向该第一AMF发送该终端设备的签约修改通知消息,并执行后续的步骤。
图6是根据本申请实施例提供的另一通信方法的示意性流程图。
601,AMF获取终端设备的Subscribed S-NSSAIs。
该AMF是为该终端设备提供服务的AMF,即服务AMF。
可选的,在一些实施例中,该AMF可以从UDM接收该终端设备的Subscribed  S-NSSAIs。
可选的,在另一些实施例中,该AMF可以从另一个AMF接收该终端设备的Subscribed S-NSSAIs。
602,该AMF获取该终端设备的第一配置的网络切片选择辅助信息。
该第一配置的网络切片选择辅助信息是该终端设备请求注册的PLMN的配置的网络切片选择辅助信息,该终端设备请求注册的PLMN即为该AMF所在的PLMN。
可选的,在一些实施例中,该终端设备向AMF发送的注册请求消息中携带该第一配置的网络切片选择辅助信息,该AMF从该终端设备获取该第一配置网络切片辅助信息。
可选的,在另一些实施例中,该终端设备可以仅在初始注册时向AMF发送的注册请求消息中携带该第一配置的网络切片选择辅助信息。在此情况下,该注册请求消息中包括的注册类型为初始注册。换句话说,该注册请求消息中的注册类型为初始注册的情况下,该注册请求中才会包括该终端设备的第一配置的网络切片选择辅助信息。在此情况下,该AMF从该终端设备发送的初始注册请求消息中获取该第一配置的网络切片选择辅助信息。
可选的,在另一些实施例中,该终端设备可以仅在初始注册或切换PLMN时向AMF发送的注册请求消息中携带该第一配置的网络切片选择辅助信息。在此情况下,为初始注册时,该注册请求消息中包括的注册类型为初始注册。切换PLMN会触发移动性注册更新,此时终端发送的注册请求消息中包括的注册类型为移动性注册更新。换句话说,该注册请求消息中的注册类型为移动性注册更新的情况下,该注册请求中才会包括该终端设备的第一配置的网络切片选择辅助信息。
可选的,在另一些实施例中,该AMF可以从该终端设备的上下文中获取该第一配置的网络切片选择辅助信息。在此情况下,该AMF获取该终端设备的上下文,并从该上下文中获取该第一配置的网络切片选择辅助信息。上述技术方案无需该终端设备在注册请求消息中携带该第一配置的网络切片选择辅助信息,从而节省了一部分信令开销。该第一PLMN就是该终端设备请求注册的PLMN。该AMF为该第一PLMN内的AMF。
可选的,在另一些实施例中,该AMF可以向该终端设备发送配置的网络切片选择辅助信息请求消息,该配置的网络切片选择辅助信息请求消息用于请求该终端设备向该AMF发送该第一配置的网络切片选择辅助信息。例如,该AMF可以在该终端设备发送注册请求后,向该终端设备发送该配置的网络切片选择辅助信息请求消息;也可以在该终端设备发送初始注册请求后,向该终端设备发送该配置的网络切片选择辅助信息请求消息;也可以在该AMF判断该终端设备是从第二PLMN切换到第一PLMN时,向该终端设备发送该配置的网络切片选择辅助信息请求消息。
603,该AMF根据该终端设备的Subscribed S-NSSAI,确定是否要发起该第一配置的网络切片选择辅助信息的更新。
604,若该AMF确定需要发起该第一配置的网络切片选择辅助信息的更新,则基于该Subscribed S-NSSAIs确定第二配置的网络切片选择辅助信息,将该第二配置网络切片辅助信息发送至该终端设备。
可选的,在一些实施例中,该AMF可以确定该第一配置的网络切片选择辅助信息与该终端设备的Subscribed S-NSSAIs是否相同,若该第一配置的网络切片选择辅助信息与该Subscribed S-NSSAIs不相同,则确定发起该第一配置的网络切片选择辅助信息需要更新。例如,该第一PLMN是该终端设备的HPLMN,该AMF根据该终端设备的Subscribed S-NSSAIs确定该第一配置的网络切片选择辅助信息中包括的一个或多个S-NSSAI与该终端设备的Subscribed S-NSSAIs是否相同;如相同,则不需要发起该第一配置的网络切片选择辅助信息的更新,如果不同,则需要发起该第一配置的网络切片选择辅助信息的更新。在此情况下,该AMF可以将该第一配置网络且选择辅助信息更新为该第二配置的网络切片选择辅助信息,其中,该第二配置的网络切片选择辅助信息包括的一个或多个S-NSSAI与该Subscribed S-NSSAIs相同。
可选的,在另一些实施例中,该AMF可以基于该第一配置的网络切片选择辅助信息、该第一配置的网络切片选择辅助信息与该终端设备的归属公共陆地网络的配置的网络切片选择辅助信息的映射关系,以及该Subscribed S-NSSAIs,确定是否需要发起该配置的网络切片选择辅助信息的更新。例如,该第一PLMN是该终端设备的VPLMN,该AMF基于该第一配置的网络切片选择辅助信息,该第一配置的网络切片选择辅助信息与该终端设备的归属公共陆地网络的配置的网络切片选择辅助信息的映射关系以及该Subscribed S-NSSAIs,确定是否需要发起该第一配置的网络切片选择辅助信息的更新。例如,该第一PLMN是该终端设备的拜访PLMN(Visited PLMN,VPLMN),该第一配置的网络切片选择辅助信息是该终端设备的VPLMN的配置的网络切片选择辅助信息。VPLMN的配置的网络切片选择辅助信息与HPLMN的配置的网络切片选择辅助信息可以存在一个对应关系。例如,表1示出了VPLMN的配置的网络切片选择辅助信息与HPLMN的配置的网络切片选择辅助信息的对应关系。
VPLMN的配置的网络切片选择辅助信息 HPLMN的配置的网络切片选择辅助信息
S-NSSAI 1,S-NSSAI 2 S-NSSAI 11
S-NSSAI 3 S-NSSAI 21
S-NSSAI 4 S-NSSAI 31
表1
如表1所示,VPLMN的配置的网络切片选择辅助信息中的S-NSSAI 1和S-NSSAI2对应于HPLMN的配置的网络切片选择辅助信息中的S-NSSAI 11。VPLMN的配置的网络切片选择辅助信息中的S-NSSAI 3对应于HPLMN的配置的网络切片选择辅助信息中的S-NSSAI 21。VPLMN的配置的网络切片选择辅助信息中的S-NSSAI 4对应于HPLMN的配置的网络切片选择辅助信息中的S-NSSAI 31。假设,该VPLMN部署有S-NSSAI 1,S-NSSAI 2,S-NSSAI 3和S-NSSAI 4对应的网络切片。
该AMF根据该终端设备的Subscribed S-NSSAIs以及该第一配置的网络切片选择辅助信息与该终端设备的归属公共陆地网络的配置的网络切片选择辅助信息的映射关系,确定与终端设备的Subscribed S-NSSAIs对应的第三配置的网络切片选择辅助信息,并确定该第一配置的网络切片选择辅助信息与该第三配置的网络切片选择辅助信息所对应的S-NSSAI是否相同;若相同,则不需要发起更新;若不相同,则确定需要发起 更新。
以表1为例,假设该签约Subscribed S-NSSAIs包括S-NSSAI 11、S-NSSAI 21和S-NSSAI 31组成,该第一配置的网络切片选择辅助信息包括S-NSSAI 1、S-NSSAI 2、S-NSSAI3和S-NSSAI4,则该AMF确定不需要更新该第一配置的网络切片选择辅助信息。假设该终端设备的Subscribed S-NSSAIs包括S-NSSAI 11、S-NSSAI 21和S-NSSAI 31,该第一配置的网络切片选择辅助信息包括S-NSSAI 1、S-NSSAI 2和S-NSSAI 3,则该AMF确定需要更新该第一配置的网络切片选择辅助信息。该AMF可以根据该Subscribed S-NSSAIs以及该第一配置的网络切片选择辅助信息与该终端设备的归属公共陆地网络的配置的网络切片选择辅助信息的映射关系,确定该第二配置的网络切片选择辅助信息包括:S-NSSAI 1、S-NSSAI 2、S-NSSAI 3和S-NSSAI 4。可选的,在一些实施例中,该AMF在确定了该第二配置的网络切片选择辅助信息后,可以将该第二配置的网络切片选择辅助信息保存在该终端设备的上下文中,以便当该终端设备注册到其它AMF时,其它AMF可以直接从该终端设备的上下文中获取该第二配置的网络切片选择辅助信息。
图7是根据本申请实施例提供的另一种通信方法的示意性流程图。
701,终端设备注册到第一PLMN,接收更新的用户路由选择策略(User Equipment Route Selection Policy,URSP)。
702,该终端设备注册到第二PLMN的第一AMF,该终端设备确定未向该第二PLMN的任一接入和AMF发送更新指示信息。
703,该终端设备向该第一AMF发送更新指示信息,该更新指示信息用于指示该第一AMF向该终端设备发送更新的第二PLMN的配置的网络切片选择辅助信息。
704,该终端设备记录已经向该第二PLMN发送所述更新指示信息。
705,该第一AMF向该终端设备发送更新的第二PLMN的配置的网络切片选择辅助信息。
上述技术方案中,该终端设备可以根据URSP的更新确定各PLMN的配置的网络切片选择辅助信息需要更新,并且在注册到对应的PLMN时根据确定结果主动发起该终端设备的该PLMN的配置的网络切片选择辅助信息更新。
图10是根据本申请实施例提供的另一通信方法的示意性流程图。
该方法至少涉及终端设备、AMF和UDM之间的交互。例如,终端设备、AMF和UDM分别可以是图1中的终端设备110、接入和移动性管理功能网元120和统一数据管理网元130,此处不再赘述。其中,终端设备和AMF位于第一PLMN,换句话说,第一PLMN为当前服务该终端设备的PLMN。第一PLMN可以是HPLMN,或者,第一PLMN也可以是VPLMN。UDM位于终端设备的HPLMN。
如图10所示,该方法包括如下步骤:
1001,UDM向第一PLMN内的AMF发送该终端设备的更新的签约网络切片选择辅助信息(updatedSubscribed S-NSSAIs)。例如,该终端设备的更新的Subscribed S-NSSAIs用于标识更新后在第一PLMN下该终端设备可以接入的一个或多个网络切 片。
例如,当终端设备的签约数据中的Subscribed S-NSSAIs发生更新后,UDM可以通过调用UDM的签约数据管理(subscriber data management,SDM)通知(Nudm_SDM_Notification)的服务,向第一PLMN内的AMF通知更新的签约S-NSSAI。此外,UDM还可以通过调用Nudm_SDM_Get的服务,向第一PLMN内的AMF发送Subscribed S-NSSAIs和第一指示信息。该第一指示信息用于指示签约S-NSSAI发生了更新,即所述Subscribed S-NSSAIs是更新后的Subscribed S-NSSAIs。
可选的,AMF收到更新的Subscribed S-NSSAI(或,更新的Subscribed S-NSSAI和第一指示信息)后,可以向UDM返回确认(acknowledge,ACK)消息。
1002,AMF确定与第一PLMN关联的终端设备的第一配置网络切片选择辅助信息(第一configured NSSAI,第一配置NSSAI)。
其中,与第一PLMN关联的终端设备的第一配置NSSAI用于标识在第一PLMN下配置该终端设备可以接入的网络切片。后面的第二配置NSSAI、第三配置NSSAI的功能类似,不再赘述。
例如,AMF从UDM收到第一指示信息后,确定发起第一PLMN的配置NSSAI的更新。也就是说,在第一PLMN的签约S-NSSAI发生更新的情况下,AMF确定发起第一PLMN的配置NSSAI的更新。此外,当第一PLMN为VPLMN时,AMF还可以确定发起第一PLMN的配置NSSAI与HPLMN的配置NSSAI之间对应关系的更新。或者,AMF也可以仅发起第一PLMN的配置NSSAI与HPLMN的配置NSSAI之间对应关系的更新,此处不做限制。
例如,AMF从UDM接收更新的签约S-NSSAI后,可以根据更新的签约S-NSSAI确定第一PLMN的第一配置NSSAI。或者,AMF从UDM接收更新的签约S-NSSAI后,可以从网络切片选择功能(Network Slice Selection Function,NSSF)网元获取第一配置NSSAI。NSSF的功能包括为终端设备选择网络切片。由此,AMF获取到了与第一PLMN关联的终端设备的第一配置NSSAI。可选的,AMF根据获取到的第一配置NSSAI得到第一配置NSSAI与HPLMN的配置NSSAI之间对应关系。
1003,AMF向终端设备发送第一配置NSSAI(和/或第一配置NSSAI与HPLMN的配置NSSAI之间对应关系)和第二指示信息。该第二指示信息用于指示终端设备删除与除第一PLMN之外的其他网络关联的第二配置NSSAI。
如上所述,在第一PLMN的签约S-NSSAI发生更新的情况下,AMF确定发起第一PLMN的配置NSSAI的更新,进而才会通过步骤1003向UE发送上述第二指示信息。也就是说,当AMF被通知第一PLMN的签约S-NSSAI发生更新的情况下,AMF才会通过步骤1003向UE发送上述第二指示信息。
例如,AMF可以向终端设备发送用户设备配置更新命令(UE configuration update command),该用户设备配置更新命令包括第一配置NSSAI和第二指示信息;或,AMF可以向终端设备发送注册接受(registration accept)消息,该注册接受消息包括第一配置NSSAI和第二指示信息,本申请在此并不限制。上述消息可以由AMF发送至(R)AN设备后,由(R)AN设备将消息转发至终端设备。
这里的“除所述第一网络外的其他网络”可以是指该终端可能接入的网络范围内 除第一PLMN之外的其他PLMN。
可选的,该第二指示信息还用于指示终端设备删除与除第一PLMN之外的其他网络关联的允许网络切片选择辅助信息(allowed NSSAI,允许的NSSAI)。其中,终端设备与一个网络关联的允许的NSSAI用于标识在第一PLMN下允许该终端设备接入的网络切片。
可选的,该第二指示信息还用于指示终端设备删除与除第一PLMN之外的其他网络关联的第二配置NSSAI与HPLMN的配置NSSAI之间对应关系。可选的,该第二指示信息还用于指示终端设备删除与除第一PLMN之外的其他网络关联的允许的NSSAI与HPLMN的配置NSSAI之间对应关系。
1004,终端设备收到第一配置NSSAI和第二指示信息后,删除与除第一PLMN外的其他网络关联的第二配置NSSAI;并将存储的与第一PLMN关联的第三配置NSSAI替换为所述第一配置NSSAI。
可选的,当第二指示信息还用于指示终端设备删除与除第一PLMN之外的其他网络关联的第二配置NSSAI与HPLMN的配置NSSAI之间对应关系时,终端设备在收到步骤1003中发送的指示信息后,还删除第二配置NSSAI与HPLMN的配置NSSAI之间对应关系。
因此,通过上述方案,在终端数据的签约数据修改导致当前PLMN的终端设备的配置NSSAI发生变化时,AMF向终端设备发送更新的当前PLMN的配置NSSAI,并指示终端设备删除在此之前存储的其他PLMN的配置NSSAI。这样,当终端设备下次注册到其他PLMN的时候,由于终端设备没有存储该PLMN对应的配置NSSAI,终端设备不会在注册请求中携带请求的NSSAI(Requested NSSAI),故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该PLMN的配置NSSAI。因此,该PLMN的配置NSSAI能够得到及时的更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,当第二指示信息还用于指示终端设备删除与其他网络关联的允许的NSSAI时,终端设备在收到步骤1003中发送的指示信息后,还删除与其他网络关联的允许的NSSAI。可选的,终端设备还删除与除第一PLMN之外的其他网络关联的允许的NSSAI与HPLMN的配置NSSAI之间对应关系。
因此,当终端设备下次注册到其他PLMN的时候,由于终端设备也没有存储该PLMN对应的允许的NSSAI,终端设备不能根据允许的NSSAI确定请求的NSSAI,从而不会在注册请求中携带请求的NSSAI,故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该PLMN的配置NSSAI。因此,进一步保证了该PLMN的配置NSSAI能够得到及时的更新。
可选的,在另一种实现方式中,在上述步骤1003中,AMF可以不发送第二指示信息。终端设备收到第一配置NSSAI后,可以不需要AMF的指示,即删除与除第一PLMN外的其他网络关联的第二配置NSSAI;并将存储的与第一PLMN关联的第三配置NSSAI替换为所述第一配置NSSAI。可选的,终端设备还可以进一步删除与其他网络关联的允许的NSSAI。可选的,终端设备还删除第二配置NSSAI与HPLMN的配置NSSAI之间对应关系。可选的,终端设备还删除与除第一PLMN之外的其他网络关联 的允许的NSSAI与HPLMN的配置NSSAI之间对应关系。
可选的,当终端设备收到第一配置NSSAI后,执行步骤1005。
1005,终端设备向AMF发送确认消息(acknowledge,ACK)。
或者,终端设备可以在收到第一配置NSSAI后且执行完步骤1004的操作之后,向AMF发送ACK。
例如,若上述步骤1003中第一配置NSSAI是通过UE配置更新命令发送的,终端设备可通过UE配置更新完成消息向AMF发送ACK。若上述步骤1003中第一配置NSSAI是通过注册接受消息发送的,UE可通过注册完成消息向AMF发送ACK。
可选的,当AMF收到ACK后,执行步骤1006。
1006,AMF收到ACK后,AMF向UDM通知配置NSSAI的更新结果。
例如,AMF可以通过调用AMF的UE配置更新通知(Namf_Communication_UEConfigurationUpdateNotify)的服务,向UDM通知配置NSSAI的更新结果。可选的,上述步骤1001可以看作为UDM向AMF订阅该服务。UDM收到通知后,确定不需要发起配置NSSAI的更新。例如,在终端设备的签约S-NSSAI再次更新前,UDM都不发起配置NSSAI的更新。
例如,AMF可以通过调用AMF的事件通知(Namf_EventExposure_Notify)的服务,向UDM通知配置NSSAI的更新结果。可选的,上述步骤1001之前或之后,UDM向AMF订阅该服务。UDM收到通知后,确定不需要发起配置NSSAI的更新。例如,在终端设备的签约S-NSSAI再次更新前,UDM都不发起配置NSSAI的更新。
如上所述,图10的例子适用于终端设备签约修改(指的是签约数据中的Subscribed S-NSSAIs的修改)触发的配置NSSAI更新。
在一种可能的设计中,上述方法还可适用于其他条件触发的配置NSSAI更新。例如,其他条件包括以下中的至少一项:
1.服务PLMN的配置修改,包括本地策略修改或者切片部署发生变化导致的修改;
2.终端设备在发送注册请求时没有携带请求的NSSAI;
3.终端设备请求的NSSAI中的某一个S-NSSAI在终端设备当前的PLMN是无效的;
4.终端设备请求的NSSAI不在终端设备的签约S-NSSAIs的范围内。
在另一种可能的设计中,仅在终端设备签约修改触发的配置NSSAI更新的情况下,AMF才指示终端设备删除与除第一PLMN外的其他网络关联的第二配置NSSAI、或指示终端设备删除与除第一PLMN外的其他网络关联的第二配置NSSAI以及允许的NSSAI。
图10所述的方法可适用于终端设备关机再开机的场景,也可适用于漫游场景。或者,可选的,对于终端设备关机再开机的场景,可采用上述图2至图7中任一所述的方法;对于漫游场景,可采用图10所述的方法。
结合上面图10的描述,本申请提供了一种通信方法,如图11所示,该方法包括如下步骤:
1101,第一网络的接入和移动性管理功能网元获取与所述第一网络关联的终端设 备的第一配置网络切片选择辅助信息。
1102,该接入和移动性管理功能网元向所述终端设备发送所述第一配置网络切片选择辅助信息和指示信息,所述指示信息用于指示所述终端设备删除与除所述第一网络之外的其他网络关联的第二配置网络切片选择辅助信息。
指示信息可参考图10中关于第二指示信息的描述。步骤1102可参考图10中步骤1003的描述,此处不再赘述。例如,步骤1102包括:所述接入和移动性管理功能网元向所述终端设备发送用户设备配置更新命令,所述用户设备配置更新命令包括所述第一配置网络切片选择辅助信息和所述指示信息;或,所述接入和移动性管理功能网元向所述终端设备发送注册接受消息,所述注册接受消息包括所述第一配置网络切片选择辅助信息和所述指示信息。
因此,当终端设备下次注册到其他网络的时候,由于终端设备没有存储该网络对应的配置网络切片选择辅助信息,终端设备不会在注册请求中携带请求的网络切片选择辅助信息,故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该网络的配置网络切片选择辅助信息。因此,该网络的配置网络切片选择辅助信息能够得到及时的更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,该指示信息还用于指示所述终端设备删除与所述其他网络关联的允许网络切片选择辅助信息。因此,当终端设备下次注册到其他网络的时候,由于终端设备也没有存储该网络对应的允许的网络切片选择辅助信息,终端设备不能根据允许的网络切片选择辅助信息确定请求的网络切片选择辅助信息,从而不会在注册请求中携带请求的网络切片选择辅助信息,故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该网络的配置网络切片选择辅助信息。因此,进一步保证了该网络的配置网络切片选择辅助信息能够得到及时的更新。
可选的,所述第一网络的接入和移动性管理功能网元获取与所述第一网络关联的终端设备的第一配置网络切片选择辅助信息,包括:所述接入和移动性管理功能网元从数据管理网元接收与所述第一网络关联的所述终端设备的更新的Subscribed S-NSSAIs;所述接入和移动性管理功能网元根据所述更新的Subscribed S-NSSAIs,获取所述第一配置网络切片选择辅助信息。接入和移动性管理功能网元确定所述第一配置网络切片选择辅助信息是基于所述更新的Subscribed S-NSSAIs获取的,据此向所述终端设备发送所述指示信息。例如,参考上述图10中步骤1001和1002的描述。
结合上面图10的描述,本申请提供了一种通信方法,如图12所示,该方法包括如下步骤:
1201,终端设备从第一网络的接入和移动性管理功能网元接收对应所述第一网络的所述终端设备的第一配置网络切片选择辅助信息。
步骤1201可参考图10中步骤1003的描述,此处不再赘述。
1202,该终端设备删除与除所述第一网络外的其他网络关联的第二配置网络切片选择辅助信息,将存储的与所述第一网络关联的第三配置网络切片选择辅助信息替换为所述第一配置网络切片选择辅助信息。
步骤1202可参考图10中步骤1004的描述,此处不再赘述。
因此,由于终端设备删除了与除第一网络外的其他网络关联的第二配置网络切片选择辅助信息,当终端设备下次注册到其他网络的时候,由于终端设备没有存储该网络对应的配置网络切片选择辅助信息,终端设备不会在注册请求中携带请求的网络切片选择辅助信息,故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该网络的配置网络切片选择辅助信息。因此,该网络的配置网络切片选择辅助信息能够得到及时的更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,该方法还包括:所述终端设备从所述接入和移动性管理功能网元接收指示信息,所述指示信息用于指示所述终端设备删除所述第二配置网络切片选择辅助信息。例如,参考上述图10中步骤1003的描述。
可选的,该方法还包括:所述终端设备删除与所述其他网络关联的允许网络切片选择辅助信息。例如,参考上述图10中步骤1004的描述。因此,当终端设备下次注册到其他网络的时候,由于终端设备也没有存储该网络对应的允许的网络切片选择辅助信息,终端设备不能根据允许的网络切片选择辅助信息确定请求的网络切片选择辅助信息,从而不会在注册请求中携带请求的网络切片选择辅助信息,故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该网络的配置网络切片选择辅助信息。因此,进一步保证了该网络的配置网络切片选择辅助信息能够得到及时的更新。进一步可选的,该方法还包括:所述终端设备从所述接入和移动性管理功能网元接收指示信息,所述指示信息用于指示所述终端设备删除所述第二配置网络切片选择辅助信息和允许网络切片选择辅助信息。
图13是根据本申请实施例提供的另一通信方法的示意性流程图。
该方法至少涉及终端设备、AMF和UDM之间的交互。例如,终端设备、AMF和UDM分别可以是图1中的终端设备110、接入和移动性管理功能网元120和统一数据管理网元130,此处不再赘述。其中,终端设备和AMF位于第一PLMN,换句话说,第一PLMN为当前服务该终端设备的PLMN。第一PLMN可以是HPLMN,或者,第一PLMN也可以是VPLMN。UDM位于终端设备的HPLMN。
如图13所示,该方法包括如下步骤:
1301,UDM向第一PLMN内的AMF发送该终端设备的更新的签约网络切片选择辅助信息(updated Subscribed S-NSSAIs)。例如,该终端设备的更新的Subscribed S-NSSAIs用于标识更新后在第一PLMN下该终端设备可以接入的一个或多个网络切片。
例如,当终端设备的签约数据中的Subscribed S-NSSAIs发生更新后,UDM可以通过调用UDM的签约数据管理(subscriber data management,SDM)通知(Nudm_SDM_Notification)的服务,向第一PLMN内的AMF通知更新的签约S-NSSAI。此外,UDM还可以通过调用Nudm_SDM_Get的服务,向第一PLMN内的AMF发送Subscribed S-NSSAIs和第一指示信息。该第一指示信息用于指示签约S-NSSAI发生了更新,即所述Subscribed S-NSSAIs是更新后的Subscribed S-NSSAIs。
可选的,AMF收到更新的Subscribed S-NSSAI(或,更新的Subscribed S-NSSAI和第一指示信息)后,可以向UDM返回确认(acknowledge,ACK)消息。
1302,AMF向终端设备发送第二指示信息。该第二指示信息用于指示终端设备删除与除第一PLMN之外的其他关联的第二配置NSSAI。
也就是说,当AMF被通知第一PLMN的签约S-NSSAI发生更新的情况下,AMF才会通过步骤1302向UE发送上述第二指示信息。
例如,AMF可以向终端设备发送用户设备配置更新命令(UE configuration update command),该用户设备配置更新命令包括第二指示信息;或,AMF可以向终端设备发送注册接受(registration accept)消息,该注册接受消息包括第二指示信息,本申请在此并不限制。上述消息可以由AMF发送至(R)AN设备后,由(R)AN设备将消息转发至终端设备。
这里的“除所述第一网络外的其他网络”可以是指该终端可能接入的网络范围内除第一PLMN之外的其他PLMN。
可选的,该第二指示信息还用于指示终端设备删除与除第一PLMN之外的其他网络关联的允许网络切片选择辅助信息(allowed NSSAI,允许的NSSAI)。其中,终端设备与一个网络关联的允许的NSSAI用于标识在第一PLMN下允许该终端设备接入的网络切片。
可选的,该第二指示信息还用于指示终端设备删除与除第一PLMN之外的其他网络关联的第二配置NSSAI与HPLMN的配置NSSAI之间对应关系。可选的,该第二指示信息还用于指示终端设备删除与除第一PLMN之外的其他网络关联的允许的NSSAI与HPLMN的配置NSSAI之间对应关系。
可选的,在AMF向终端设备发送第二指示信息之前,AMF确认所述终端的与第一PLMN关联的第三配置NSSAI不需要更新。
1303,终端设备收到第二指示信息后,删除与除第一PLMN外的其他网络关联的第二配置NSSAI。
可选的,当第二指示信息还用于指示终端设备删除与除第一PLMN之外的其他网络关联的第二配置NSSAI与HPLMN的配置NSSAI之间对应关系时,终端设备在收到步骤1302中发送的指示信息后,还删除第二配置NSSAI与HPLMN的配置NSSAI之间对应关系。
因此,通过上述方案,在终端数据的签约数据修改时,AMF指示终端设备删除在此之前存储的其他PLMN的配置NSSAI。这样,当终端设备下次注册到其他PLMN的时候,由于终端设备没有存储该PLMN对应的配置NSSAI,终端设备不会在注册请求中携带请求的NSSAI(Requested NSSAI),故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该PLMN的配置NSSAI。因此,该PLMN的配置NSSAI能够得到及时的更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,当第二指示信息还用于指示终端设备删除与其他网络关联的允许的NSSAI时,终端设备在收到步骤1302中发送的指示信息后,还删除与其他网络关联的允许的NSSAI。可选的,终端设备还删除与除第一PLMN之外的其他网络关联的允许的NSSAI与HPLMN的配置NSSAI之间对应关系。
因此,当终端设备下次注册到其他PLMN的时候,由于终端设备也没有存储该PLMN对应的允许的NSSAI,终端设备不能根据允许的NSSAI确定请求的NSSAI,从 而不会在注册请求中携带请求的NSSAI,故网络侧会根据该终端设备当前的签约信息,为该终端设备提供一个该PLMN的配置NSSAI。因此,进一步保证了该PLMN的配置NSSAI能够得到及时的更新。
可选的,当终端设备收到第二指示信息后,执行步骤1304。
1304,终端设备向AMF发送确认消息(acknowledge,ACK)。
或者,终端设备可以在收到第一配置NSSAI后且执行完步骤1303的操作之后,向AMF发送ACK。
例如,若上述步骤1304中第二指示信息是通过UE配置更新命令发送的,终端设备可通过UE配置更新完成消息向AMF发送ACK。若上述步骤1302中第二指示信息是通过注册接受消息发送的,UE可通过注册完成消息向AMF发送ACK。
可选的,当AMF收到ACK后,执行步骤1305。
1305,AMF收到ACK后,AMF向UDM通知配置NSSAI的更新结果。
例如,AMF可以通过调用AMF的UE配置更新通知(Namf_Communication_UEConfigurationUpdateNotify)的服务,向UDM通知配置NSSAI的更新结果。可选的,上述步骤1301可以看作为UDM向AMF订阅该服务。UDM收到通知后,确定不需要发起配置NSSAI的更新。例如,在终端设备的签约S-NSSAI再次更新前,UDM都不发起配置NSSAI的更新。
例如,AMF可以通过调用AMF的事件通知(Namf_EventExposure_Notify)的服务,向UDM通知配置NSSAI的更新结果。可选的,上述步骤1301之前或之后,UDM向AMF订阅该服务。UDM收到通知后,确定不需要发起配置NSSAI的更新。例如,在终端设备的签约S-NSSAI再次更新前,UDM都不发起配置NSSAI的更新。
如上所述,图13的例子适用于终端设备签约修改(指的是签约数据中的Subscribed S-NSSAIs的修改)触发的配置NSSAI更新,并且支持第一PLMN管理的配置NSSAI不需要更新的场景。
在一种可能的设计中,上述方法还可适用于其他条件触发的配置NSSAI更新。例如,其他条件包括以下中的至少一项:
1.服务PLMN的配置修改,包括本地策略修改或者切片部署发生变化导致的修改;
2.终端设备在发送注册请求时没有携带请求的NSSAI;
3.终端设备请求的NSSAI中的某一个S-NSSAI在终端设备当前的PLMN是无效的;
4.终端设备请求的NSSAI不在终端设备的签约S-NSSAIs的范围内。
在另一种可能的设计中,仅在终端设备签约修改触发的配置NSSAI更新的情况下,AMF才指示终端设备删除与除第一PLMN外的其他网络关联的第二配置NSSAI、或指示终端设备删除与除第一PLMN外的其他网络关联的第二配置NSSAI以及允许的NSSAI。
图13所述的方法可适用于终端设备去注册再重新注册(如关机再开机)的场景,也可适用于漫游场景。或者,可选的,对于终端设备去注册再重新注册(如关机再开机)的场景,可采用上述图2至图7中任一所述的方法;对于漫游场景,可采用图13所述的方法。
因此,结合图13的描述,在图11所示的方法中,在步骤1102中,该接入和移动性管理功能网元可以仅向所述终端设备发送指示信息,所述指示信息用于指示所述终端设备删除与除所述第一网络之外的其他网络关联的第二配置网络切片选择辅助信息。在图12所示的方法中,在步骤1202,该终端设备可以删除与除所述第一网络外的其他网络关联的第二配置网络切片选择辅助信息。由于终端设备没有收到第一配置网络切片选择辅助信息,可以无需将存储的与所述第一网络关联的第三配置网络切片选择辅助信息替换为所述第一配置网络切片选择辅助信息。
上述本申请提供的实施例中,分别从各个网元本身、以及从各个网元之间交互的角度对本申请实施例提供的通信方法的各方案进行了介绍。可以理解的是,各个网元为了实现上述功能,其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
例如,当上述网元通过软件模块来实现相应的功能。通信装置位于第一公共陆地移动网络,可包括接收模块801、处理模块802和发送模块803,如图8A所示。该装置可以是接入和移动性管理功能网元或芯片。
该装置可用于执行上述图2中接入和移动性管理功能网元的操作。例如:接收模块801,用于从终端设备接收注册请求消息;处理模块802,用于在确定满足第一条件的情况下,通过发送模块803向所述终端设备发送所述第一公共陆地移动网络的配置的网络切片选择辅助信息,其中,所述第一条件包括以下任一:所述注册请求消息为初始注册请求消息,或者,所述注册请求消息为所述终端设备从第二公共陆地移动网络移动至所述第一公共陆地移动网络后发送的。
因此,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,所述第一条件还包括所述接入和移动性管理功能网元从统一数据管理网元获取所述终端设备的签约信息。因此,可以避免该终端设备在短时间内反复注册到该AMF时,该AMF反复给该终端设备发送所述第一PLMN的配置的网络切片选择辅助信息,从而进一步避免了网络信令的浪费,节省了网络资源。
另一通信装置可包括接收模块811和发送模块812,如图8B所示。可选的,还包括处理模块813。该装置可以是统一数据管理网元或芯片。
该装置可用于执行上述图3、图4或图5中UDM的操作。例如:接收模块811用于从第一公共陆地移动网络内的第一接入和移动性管理功能网元接收终端设备的签 约信息获取请求,其中,所述第一接入和移动性管理功能网元是为所述终端设备提供服务的接入和移动性管理功能网元;发送模块812用于向所述第一接入和移动性管理功能网元发送所述终端设备的签约信息,其中所述终端设备的签约信息至少包括所述终端设备的签约网络切片选择辅助信息;还用于指示所述第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新,其中所述第一配置的网络切片选择辅助信息是所述终端设备的所述第一公共陆地移动网络的配置的网络切片选择辅助信息。
因此,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
例如,所述发送模块812用于向所述第一接入和移动性管理功能网元发送第一指示信息,所述第一指示信息用于指示所述第一接入和移动性管理功能网元发起所述第一配置的网络切片选择辅助信息的更新。或者,所述发送模块812用于向所述第一接入和移动性管理功能网元发送所述终端设备的签约修改通知消息,所述终端设备的签约修改通知消息包括所述终端设备的签约网络切片选择辅助信息。
可选的,所述发送模块812还用于向所述第一接入和移动性管理功能网元发送订阅请求,所述订阅请求用于请求所述第一接入和移动性管理功能网元在所述第一配置的网络切片选择辅助信息更新完成后向所述统一数据管理网元发送通知消息;所述接收模块811还用于从所述第一接入和移动性管理功能网元接收所述通知消息。
可选的,处理模块813用于在所述发送模块指示所述第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新之后,确定不需要发起所述第一配置的网络切片选择辅助信息的更新。或者,处理模块813用于在所述接收模块从所述第一接入和移动性管理功能网元接收所述通知消息后,确定不需要发起所述第一配置的网络切片选择辅助信息的更新。
可选的,处理模块813用于在所述发送模块指示所述第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新之前,确定所述终端的一个或多个公共陆地移动网络的配置的网络切片选择辅助信息需要更新,所述一个或多个公共陆地移动网络包括所述第一公共陆地移动网络。例如,处理模块813用于在确定所述终端的签约信息发生变化的情况下,确定所述终端的一个或多个公共陆地移动网络的配置的网络切片选择辅助信息需要更新。
另一通信装置可包括发送模块821、接收模块822和处理模块823,如图8C所示。该装置可以是接入和移动性管理功能网元或芯片。
该装置可用于执行上述图3、图4或图5中AMF的操作。例如:发送模块821用于向统一数据管理网元发送终端设备的签约信息获取请求,其中,所述第一接入和移动性管理功能网元是为所述终端设备提供服务的接入和移动性管理功能网元;接收模块822用于从所述统一数据管理网元接收所述终端设备的签约信息,所述终端设备的 签约信息至少包括所述终端设备的签约网络切片选择辅助信息;处理模块823用于根据所述统一数据管理网元的指示发起第一配置的网络切片选择辅助信息的更新,其中所述第一配置的网络切片选择辅助信息为所述终端设备的所述第一公共陆地移动网络的配置的网络切片选择辅助信息。
因此,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,所述处理模块823用于在所述接收模块在从所述统一数据管理网元接收到第一指示信息的情况下,基于所述签约网络切片选择辅助信息,发起所述第一配置的网络切片选择辅助信息的更新。或者,所述处理模块823用于在所述接收模块在从所述统一数据管理网元接收到所述终端设备的签约修改通知消息的情况下,基于所述终端设备的签约修改通知消息包括的所述终端设备的签约网络切片选择辅助信息,发起所述第一配置的网络切片选择辅助信息的更新。
可选的,所述接收模块822还用于从所述统一数据管理网元接收订阅请求,所述订阅请求用于请求所述第一接入和移动性管理功能网元在所述第一配置的网络切片选择辅助信息更新完成后向所述统一数据管理网元发送通知消息;所述接收模块822在从所述终端设备接收到配置更新完成消息后,所述发送模块821还用于向所述统一数据管理网元发送所述通知消息,其中,所述配置更新完成消息用于指示所述终端设备完成所述第一配置的网络切片选择辅助信息的更新。
另一通信装置可包括获取模块831和处理模块832,如图8D所示。该装置可以是接入和移动性管理功能网元或芯片。
该装置可用于执行上述图6中AMF的操作。例如:获取模块831用于获取所述终端设备的签约网络切片选择辅助信息;获取所述终端设备的第一配置的网络切片选择辅助信息,所述第一配置的网络切片选择辅助信息为所述终端设备请求注册的第一公共陆地移动网络的配置的网络切片选择辅助信息;处理模块832用于根据所述签约网络切片选择辅助信息确定所述第一配置的网络切片选择辅助信息是否需要更新;若确定所述第一配置的网络切片选择辅助信息需要更新,则基于所述签约网络切片选择辅助信息确定第二配置的网络切片选择辅助信息,通过发送模块将所述第二配置的网络切片选择辅助信息发送至所述终端设备。
因此,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,所述获取模块831用于从所述终端设备接收注册请求消息,所述注册请求消息包括所述第一配置的网络切片选择辅助信息。所述注册请求消息为初始注册请 求消息,或者,所述注册请求消息为所述终端设备从第二公共陆地移动网络移动至所述第一公共陆地移动网络后发送的。或者,获取模块831用于获取所述终端设备的上下文,所述终端设备的上下文包括所述第一配置的网络切片选择辅助信息。
可选的,所述处理模块832用于确定所述第一配置的网络切片选择辅助信息与所述签约网络切片选择辅助信息是否相同,若所述第一配置的网络切片选择辅助信息与所述签约网络切片选择辅助信息不相同,则确定所述第一配置的网络切片选择辅助信息需要更新为第二配置的网络切片选择辅助信息;其中,所述第二配置的网络切片选择辅助信息包括的单网络切片选择辅助信息与所述签约网络切片选择辅助信息相同。
可选的,所述第一配置的网络切片选择辅助信息为所述终端设备的拜访地公共陆地网络的配置的网络切片选择辅助信息,所述处理模块832用于基于所述第一配置的网络切片选择辅助信息、所述第一配置的网络切片选择辅助信息与所述终端设备的归属公共陆地网络的配置的网络切片选择辅助信息的映射关系,以及所述签约网络切片选择辅助信息,确定所述第一配置的网络切片选择辅助信息是否需要更新。
可选的,所述处理模块832还用于将所述第二配置的网络切片选择辅助信息保存在所述终端设备的上下文中。
另一通信装置可包括发送模块841和接收模块842,如图8E所示。该装置可以是终端设备或芯片。
该装置可用于执行上述图6中UE的操作。例如:发送模块841用于向接入和移动性管理功能网元发送注册请求消息,所述注册请求消息包括所述终端设备的第一配置的网络切片选择辅助信息,所述第一配置的网络切片选择辅助信息为所述终端设备请求注册的第一公共陆地移动网络的配置的网络切片选择辅助信息;接收模块842用于获取所述第一公共陆地移动网络的第二配置的网络切片选择辅助信息。
因此,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,所述注册请求消息为初始注册请求消息,或者,所述注册请求消息为所述终端设备从第二公共陆地移动网络移动至所述第一公共陆地移动网络后发送的。
另一通信装置可包括接收模块851、处理模块852和发送模块853,如图8F所示。该装置可以是终端设备或芯片。
该装置可用于执行上述图7中UE的操作。例如:接收模块851用于接收更新的用户路由选择策略;处理模块852用于确定未记录向接入和移动性管理功能网元发送更新指示信息;发送模块853用于向该接入和移动性管理功能网元发送更新指示信息,该更新指示信息用于指示该接入和移动性管理功能网元向该终端设备发送更新的配置网络切片选择辅助信息,其中该接入和移动性管理功能网元位于拜访地公共陆地移动网络;处理模块852用于记录已经向拜访地PLMN发送该更新指示信息。
因此,对于终端设备在去注册状态(RM-DEREGISTERED)下终端设备的Subscribed S-NSSAIs发生变化的场景,或者,终端设备从第二PLMN移动至第一PLMN,且在该终端设备驻留在该第二PLMN时,终端设备签约信息中包括的Subscribed S-NSSAIs发生了变化的场景,上述方法可以保证该终端设备使用的第一PLMN的Configured NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
另一通信装置可包括获取模块861和发送模块862,如图8G所示。该装置可以是接入和移动性管理功能网元或芯片。
该装置可用于执行上述图10或11中AMF的操作。例如:获取模块861用于获取与所述第一网络关联的终端设备的第一配置网络切片选择辅助信息;发送模块862用于向所述终端设备发送所述第一配置网络切片选择辅助信息和指示信息,所述指示信息用于指示所述终端设备删除与除所述第一网络之外的其他网络关联的第二配置网络切片选择辅助信息。
因此,上述通信装置可以保证该终端设备使用的第一PLMN的配置NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,所述指示信息还用于指示所述终端设备删除与所述其他网络关联的允许网络切片选择辅助信息。
可选的,为获取与所述第一网络关联的终端设备的第一配置网络切片选择辅助信息,获取模块861具体用于:从数据管理网元接收与所述第一网络关联的所述终端设备的更新的Subscribed S-NSSAIs;根据所述更新的Subscribed S-NSSAIs,获取所述第一配置网络切片选择辅助信息。该通信装置确定所述第一配置网络切片选择辅助信息是基于所述更新的Subscribed S-NSSAIs获取的,从而发送模块862向所述终端设备发送所述指示信息。
可选的,为发送所述第一配置网络切片选择辅助信息和指示信息,发送模块862具体用于:向所述终端设备发送用户设备配置更新命令,所述用户设备配置更新命令包括所述第一配置网络切片选择辅助信息和所述指示信息;或,向所述终端设备发送注册接受消息,所述注册接受消息包括所述第一配置网络切片选择辅助信息和所述指示信息。
另一通信装置可包括接收模块871和处理模块872,如图8H所示。该装置可以是终端设备或芯片。
该装置可用于执行上述图10或12中终端设备的操作。例如:接收模块871用于从第一网络的接入和移动性管理功能网元接收对应所述第一网络的所述终端设备的第一配置网络切片选择辅助信息;处理模块872用于删除与除所述第一网络外的其他网络关联的第二配置网络切片选择辅助信息;将存储的与所述第一网络关联的第三配置网络切片选择辅助信息替换为所述第一配置网络切片选择辅助信息。
因此,上述通信装置可以保证该终端设备使用的第一PLMN的配置NSSAI及时得到更新,从而提高终端设备的用户体验也节省了网络资源。
可选的,接收模块871用还于从所述接入和移动性管理功能网元接收指示信息, 所述指示信息用于指示所述终端设备删除所述第二配置网络切片选择辅助信息。
可选的,处理模块872还用于删除与所述其他网络关联的允许网络切片选择辅助信息。进一步可选的,接收模块871用还于从所述接入和移动性管理功能网元接收指示信息,所述指示信息用于指示所述终端设备删除所述第二配置网络切片选择辅助信息和允许网络切片选择辅助信息。
图9示出了上述实施例中所涉及的通信装置的另一种可能的结构示意图。该装置包括收发器1001和处理器1002,如图10所示。
例如,处理器1002可以为通用微处理器、数据处理电路、专用集成电路(application specific integrated circuit,ASIC)或者现场可编程门阵列(field-programmable gate arrays,FPGA)电路。所述装置还可以包括存储器1003。所述存储器用于与处理器1002耦合,其保存该装置必要的计算机程序10031。
此外,上述实施例中所涉及的通信方法还提供了一种计算机可读存储介质1004(例如,硬盘),所述计算机可读存储介质内保存有该上述装置的计算机程序10041,可以将计算机程序10041加载到处理器1002中。
当上述计算机程序10031或10041在计算机(例如,处理器1002)上运行时,可使得计算机执行上述的方法。
例如,在一个实施例中,处理器1002被配置为执行上述接入和移动性管理功能网元(AMF)的操作或功能。收发器1004用于实现该装置与UDM、RAN设备或其他AMF的通信。
在另一个实施例中,处理器1002被配置为执行上述统一数据管理网元(UDM)的操作或功能。收发器1004用于实现该装置与AMF的通信。
在又一个实施例中,处理器1002被配置为执行上述终端设备(UE)的操作或功能。收发器1004用于实现该装置与AMF、RAN设备的通信。
用于执行本申请的报文传输装置的处理器可以是中央处理器(CPU),通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC),现场可编程门阵列(FPGA)或者其他可编程逻辑器件、晶体管逻辑器件,硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框,模块和电路。所述处理器也可以是实现计算功能的组合,例如包含一个或多个微处理器组合,DSP和微处理器的组合等等。
结合本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现,也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成,软件模块可以被存放于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器,从而使处理器能够从该存储介质读取信息,且可向该存储介质写入信息。当然,存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外,该ASIC可以位于通信装置中。当然,处理器和存储介质也可以作为分立组件存在于通信装置中。存储器1003可以包括易失性存储器(volatile memory),例如随机存取存储器(random-access memory,RAM);存 储器701也可以包括非易失性存储器(non-volatile memory),例如快闪存储器(flash memory),硬盘(hard disk drive,HDD)或固态硬盘(solid-state drive,SSD);存储器701还可以包括上述种类的存储器的组合。
因此,本申请的又一方面提供了一种计算机可读存储介质,该计算机可读存储介质中存储有指令,当该指令在计算机上运行时,使得计算机执行上述方法。
本申请的又一方面提供了一种包含指令的计算机程序产品,当该计算机程序产品在计算机上运行时,使得计算机执行上述方法。
本申请的又一方面提供了一种通信系统,包括:用于执行如权利要求1或2所述方法的接入和移动性管理功能网元。
本申请的又一方面提供了一种通信系统,包括:用于执行如权利要求3至10任一项所述方法的统一数据管理网元;以及用于执行如权利要求11至14任一项所述方法的接入和移动性管理功能网元。
本申请的又一方面提供了一种通信系统,包括:用于执行如权利要求15至21任一项所述方法的接入和移动性管理功能网元。可选的,该系统还包括:用于执行如权利要求22或23所述方法的终端设备。
本申请的又一方面提供了一种通信系统,包括:用于执行如权利要求31至34任一项所述方法的接入和移动性管理功能网元。可选的,该系统还包括:用于执行如权利要求35至38任一项所述方法的终端设备。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以 存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。

Claims (65)

  1. 一种通信方法,其特征在于,所述方法包括:
    第一公共陆地移动网络内的接入和移动性管理功能网元从终端设备接收注册请求消息;
    所述接入和移动性管理功能网元在确定满足第一条件的情况下,向所述终端设备发送所述第一公共陆地移动网络的配置的网络切片选择辅助信息,其中,所述第一条件包括以下任一:所述注册请求消息为初始注册请求消息,或者,所述注册请求消息为所述终端设备从第二公共陆地移动网络移动至所述第一公共陆地移动网络后发送的。
  2. 如权利要求1所述的方法,其特征在于,所述第一条件还包括所述接入和移动性管理功能网元从统一数据管理网元获取所述终端设备的签约信息。
  3. 一种通信方法,其特征在于,所述方法包括:
    统一数据管理网元从第一公共陆地移动网络内的第一接入和移动性管理功能网元接收终端设备的签约信息获取请求,其中,所述第一接入和移动性管理功能网元是为所述终端设备提供服务的接入和移动性管理功能网元;
    所述统一数据管理网元向所述第一接入和移动性管理功能网元发送所述终端设备的签约信息,其中所述终端设备的签约信息至少包括所述终端设备的签约网络切片选择辅助信息;
    所述统一数据管理网元指示所述第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新,其中所述第一配置的网络切片选择辅助信息是所述终端设备的所述第一公共陆地移动网络的配置的网络切片选择辅助信息。
  4. 如权利要求3所述的方法,其特征在于,所述统一数据管理网元指示所述第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新,包括:
    所述统一数据管理网元向所述第一接入和移动性管理功能网元发送第一指示信息,所述第一指示信息用于指示所述第一接入和移动性管理功能网元发起所述第一配置的网络切片选择辅助信息的更新。
  5. 如权利要求3所述的方法,其特征在于,所述统一数据管理网元指示所述第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新,包括:
    所述统一数据管理网元向所述第一接入和移动性管理功能网元发送所述终端设备的签约修改通知消息,所述终端设备的签约修改通知消息包括所述终端设备的签约网络切片选择辅助信息。
  6. 如权利要求3至5任一所述的方法,其特征在于,所述方法还包括:
    所述统一数据管理网元向所述第一接入和移动性管理功能网元发送订阅请求,所述订阅请求用于请求所述第一接入和移动性管理功能网元在所述第一配置的网络切片选择辅助信息更新完成后向所述统一数据管理网元发送通知消息;
    所述统一数据管理网元从所述第一接入和移动性管理功能网元接收所述通知消息。
  7. 如权利要求3至6中任一项所述的方法,其特征在于,所述方法还包括:
    所述统一数据管理网元指示所述第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新之后,所述统一数据管理网元确定不需要发起所述第一配置的网络切片选择辅助信息的更新。
  8. 如权利要求6所述的方法,其特征在于,所述方法还包括:
    所述统一数据管理网元从所述第一接入和移动性管理功能网元接收所述通知消息后,所述统一数据管理网元确定不需要发起所述第一配置的网络切片选择辅助信息的更新。
  9. 如权利要求3至8中任一项所述的方法,其特征在于,在所述统一数据管理网元指示所述第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新之前,所述方法还包括:
    所述统一数据管理网元确定所述终端的一个或多个公共陆地移动网络的配置的网络切片选择辅助信息需要更新,所述一个或多个公共陆地移动网络包括所述第一公共陆地移动网络。
  10. 如权利要求9所述的方法,其特征在于,所述统一数据管理网元确定所述终端的一个或多个公共陆地移动网络的配置的网络切片选择辅助信息需要更新,包括:
    所述统一数据管理网元在确定所述终端的签约信息发生变化的情况下,确定所述终端的一个或多个公共陆地移动网络的配置的网络切片选择辅助信息需要更新。
  11. 一种通信方法,其特征在于,所述方法包括:
    第一公共陆地移动网络内的第一接入和移动性管理功能网元向统一数据管理网元发送终端设备的签约信息获取请求,其中,所述第一接入和移动性管理功能网元是为所述终端设备提供服务的接入和移动性管理功能网元;
    所述第一接入和移动性管理功能网元从所述统一数据管理网元接收所述终端设备的签约信息,所述终端设备的签约信息至少包括所述终端设备的签约网络切片选择辅助信息;
    所述第一接入和移动性管理功能网元根据所述统一数据管理网元的指示发起第一配置的网络切片选择辅助信息的更新,其中所述第一配置的网络切片选择辅助信息为所述终端设备的所述第一公共陆地移动网络的配置的网络切片选择辅助信息。
  12. 如权利要求11所述的方法,其特征在于,所述第一接入和移动性管理功能网元根据所述统一数据管理网元的指示发起第一配置的网络切片选择辅助信息的更新,包括:
    所述第一接入和移动性管理功能网元在从所述统一数据管理网元接收到第一指示信息的情况下,基于所述签约网络切片选择辅助信息,发起所述第一配置的网络切片选择辅助信息的更新。
  13. 如权利要求11所述的方法,其特征在于,所述第一接入和移动性管理功能网元根据所述统一数据管理网元的指示发起第一配置的网络切片选择辅助信息的更新,包括:
    所述第一接入和移动性管理功能网元在从所述统一数据管理网元接收到所述终端设备的签约修改通知消息的情况下,基于所述终端设备的签约修改通知消息包括的所述终端设备的签约网络切片选择辅助信息,发起所述第一配置的网络切片选择辅助信息的更新。
  14. 如权利要求11至13任一项所述的方法,其特征在于,所述方法包括:
    所述第一接入和移动性管理功能网元从所述统一数据管理网元接收订阅请求,所 述订阅请求用于请求所述第一接入和移动性管理功能网元在所述第一配置的网络切片选择辅助信息更新完成后向所述统一数据管理网元发送通知消息;
    所述第一接入和移动性管理功能网元在从所述终端设备接收到配置更新完成消息后,向所述统一数据管理网元发送所述通知消息,其中,所述配置更新完成消息用于指示所述终端设备完成所述第一配置的网络切片选择辅助信息的更新。
  15. 一种通信方法,其特征在于,所述方法包括:
    接入和移动性管理功能网元获取所述终端设备的签约网络切片选择辅助信息;
    所述接入和移动性管理功能网元获取所述终端设备的第一配置的网络切片选择辅助信息,所述第一配置的网络切片选择辅助信息为所述终端设备请求注册的第一公共陆地移动网络的配置的网络切片选择辅助信息;
    所述接入和移动性管理功能网元根据所述签约网络切片选择辅助信息确定所述第一配置的网络切片选择辅助信息是否需要更新;
    若所述接入和移动性管理功能网元确定所述第一配置的网络切片选择辅助信息需要更新,则基于所述签约网络切片选择辅助信息确定第二配置的网络切片选择辅助信息,将所述第二配置的网络切片选择辅助信息发送至所述终端设备。
  16. 如权利要求15所述的方法,其特征在于,所述接入和移动性管理功能网元获取所述终端设备的第一配置的网络切片选择辅助信息,包括:
    所述接入和移动性管理功能网元从所述终端设备接收注册请求消息,所述注册请求消息包括所述第一配置的网络切片选择辅助信息。
  17. 如权利要求16所述的方法,其特征在于,所述注册请求消息为初始注册请求消息,或者,所述注册请求消息为所述终端设备从第二公共陆地移动网络移动至所述第一公共陆地移动网络后发送的。
  18. 如权利要求15所述的方法,其特征在于,所述接入和移动性管理功能网元获取所述终端设备的第一配置的网络切片选择辅助信息,包括:
    所述接入和移动性管理功能网元获取所述终端设备的上下文,所述终端设备的上下文包括所述第一配置的网络切片选择辅助信息。
  19. 如权利要求15至18中任一项所述的方法,其特征在于,所述接入和移动性管理功能网元根据所述签约网络切片选择辅助信息确定是否要发起所述第一配置的网络切片选择辅助信息的更新,包括:
    所述接入和移动性管理功能网元确定所述第一配置的网络切片选择辅助信息与所述签约网络切片选择辅助信息是否相同,若所述第一配置的网络切片选择辅助信息与所述签约网络切片选择辅助信息不相同,则确定所述第一配置的网络切片选择辅助信息需要更新为第二配置的网络切片选择辅助信息;
    其中,所述第二配置的网络切片选择辅助信息包括的单网络切片选择辅助信息与所述签约网络切片选择辅助信息相同。
  20. 如权利要求15至18中任一项所述的方法,其特征在于,所述第一配置的网络切片选择辅助信息为所述终端设备的拜访地公共陆地网络的配置的网络切片选择辅助信息,所述接入和移动性管理功能网元根据所述签约网络切片选择辅助信息确定所述第一配置的网络切片选择辅助信息是否需要更新,包括:
    所述接入和移动性管理功能网元基于所述第一配置的网络切片选择辅助信息、所述第一配置的网络切片选择辅助信息与所述终端设备的归属公共陆地网络的配置的网络切片选择辅助信息的映射关系,以及所述签约网络切片选择辅助信息,确定所述第一配置的网络切片选择辅助信息是否需要更新。
  21. 如权利要求15至20中任一项所述的方法,其特征在于,所述方法还包括:
    所述接入和移动性管理功能网元将所述第二配置的网络切片选择辅助信息保存在所述终端设备的上下文中。
  22. 一种通信方法,其特征在于,所述方法包括:
    终端设备向接入和移动性管理功能网元发送注册请求消息,所述注册请求消息包括所述终端设备的第一配置的网络切片选择辅助信息,所述第一配置的网络切片选择辅助信息为所述终端设备请求注册的第一公共陆地移动网络的配置的网络切片选择辅助信息;
    所述终端设备获取所述第一公共陆地移动网络的第二配置的网络切片选择辅助信息。
  23. 如权利要求22所述的方法,其特征在于,所述注册请求消息为初始注册请求消息,或者,所述注册请求消息为所述终端设备从第二公共陆地移动网络移动至所述第一公共陆地移动网络后发送的。
  24. 一种通信装置,其特征在于,位于第一公共陆地移动网络,所述通信装置包括:
    接收模块,用于从终端设备接收注册请求消息;
    处理模块,用于在确定满足第一条件的情况下,通过发送模块向所述终端设备发送所述第一公共陆地移动网络的配置的网络切片选择辅助信息,其中,所述第一条件包括以下任一:所述注册请求消息为初始注册请求消息,或者,所述注册请求消息为所述终端设备从第二公共陆地移动网络移动至所述第一公共陆地移动网络后发送的。
  25. 如权利要求24所述的通信装置,其特征在于,所述第一条件还包括所述接入和移动性管理功能网元从统一数据管理网元获取所述终端设备的签约信息。
  26. 一种通信装置,其特征在于,包括:
    接收模块,用于从第一公共陆地移动网络内的第一接入和移动性管理功能网元接收终端设备的签约信息获取请求,其中,所述第一接入和移动性管理功能网元是为所述终端设备提供服务的接入和移动性管理功能网元;
    发送模块,用于向所述第一接入和移动性管理功能网元发送所述终端设备的签约信息,其中所述终端设备的签约信息至少包括所述终端设备的签约网络切片选择辅助信息;还用于指示所述第一接入和移动性管理功能网元发起第一配置的网络切片选择辅助信息的更新,其中所述第一配置的网络切片选择辅助信息是所述终端设备的所述第一公共陆地移动网络的配置的网络切片选择辅助信息。
  27. 一种通信装置,其特征在于,位于第一公共陆地移动网络,所述通信装置包括:
    发送模块,用于向统一数据管理网元发送终端设备的签约信息获取请求,其中,所述第一接入和移动性管理功能网元是为所述终端设备提供服务的接入和移动性管理 功能网元;
    接收模块,用于从所述统一数据管理网元接收所述终端设备的签约信息,所述终端设备的签约信息至少包括所述终端设备的签约网络切片选择辅助信息;
    处理模块,用于根据所述统一数据管理网元的指示发起第一配置的网络切片选择辅助信息的更新,其中所述第一配置的网络切片选择辅助信息为所述终端设备的所述第一公共陆地移动网络的配置的网络切片选择辅助信息。
  28. 一种通信装置,其特征在于,包括:
    获取模块,用于获取所述终端设备的签约网络切片选择辅助信息;获取所述终端设备的第一配置的网络切片选择辅助信息,所述第一配置的网络切片选择辅助信息为所述终端设备请求注册的第一公共陆地移动网络的配置的网络切片选择辅助信息;
    处理模块,用于根据所述签约网络切片选择辅助信息确定所述第一配置的网络切片选择辅助信息是否需要更新;若确定所述第一配置的网络切片选择辅助信息需要更新,则基于所述签约网络切片选择辅助信息确定第二配置的网络切片选择辅助信息,通过发送模块将所述第二配置的网络切片选择辅助信息发送至所述终端设备。
  29. 一种通信装置,其特征在于,包括:
    发送模块,用于向接入和移动性管理功能网元发送注册请求消息,所述注册请求消息包括所述终端设备的第一配置的网络切片选择辅助信息,所述第一配置的网络切片选择辅助信息为所述终端设备请求注册的第一公共陆地移动网络的配置的网络切片选择辅助信息;
    接收模块,用于获取所述第一公共陆地移动网络的第二配置的网络切片选择辅助信息。
  30. 如权利要求29所述的通信装置,其特征在于,所述注册请求消息为初始注册请求消息,或者,所述注册请求消息为所述终端设备从第二公共陆地移动网络移动至所述第一公共陆地移动网络后发送的。
  31. 一种通信方法,其特征在于,包括:
    第一网络的接入和移动性管理功能网元从数据管理网元接收终端设备的更新的签约网络切片选择辅助信息;根据所述更新的签约网络切片选择辅助信息,获取与所述第一网络关联的终端设备的第一配置网络切片选择辅助信息;
    所述接入和移动性管理功能网元向所述终端设备发送所述第一配置网络切片选择辅助信息和指示信息,所述指示信息用于指示所述终端设备删除与除所述第一网络之外的其他网络关联的第二配置网络切片选择辅助信息。
  32. 如权利要求31所述的方法,其特征在于,根据所述更新的签约网络切片选择辅助信息,获取与所述第一网络关联的终端设备的第一配置网络切片选择辅助信息,包括:
    所述接入和移动性管理功能网元根据所述更新的签约网络切片选择辅助信息,确定所述第一配置网络切片选择辅助信息;或者
    所述接入和移动性管理功能网元接收所述更新的签约网络切片选择辅助信息后,从网络切片选择功能网元获取所述第一配置网络切片选择辅助信息。
  33. 如权利要求31或32所述的方法,其特征在于,所述指示信息还用于指示所 述终端设备删除与所述其他网络关联的允许的网络切片选择辅助信息。
  34. 如权利要求31至33任一项所述的方法,其特征在于,
    所述接入和移动性管理功能网元向所述终端设备发送所述指示信息,包括:
    所述接入和移动性管理功能网元确定所述第一配置网络切片选择辅助信息是基于所述更新的签约网络切片选择辅助信息获取的,向所述终端设备发送所述指示信息。
  35. 如权利要求31至34任一项所述的方法,其特征在于,所述接入和移动性管理功能网元向所述终端设备发送所述第一配置网络切片选择辅助信息和指示信息,包括:
    所述接入和移动性管理功能网元向所述终端设备发送用户设备配置更新命令,所述用户设备配置更新命令包括所述第一配置网络切片选择辅助信息和所述指示信息。
  36. 如权利要求31至34任一项所述的方法,其特征在于,所述接入和移动性管理功能网元向所述终端设备发送所述第一配置网络切片选择辅助信息和指示信息,包括:
    所述接入和移动性管理功能网元向所述终端设备发送注册接受消息,所述注册接受消息包括所述第一配置网络切片选择辅助信息和所述指示信息。
  37. 一种通信方法,其特征在于,包括:
    终端设备从第一网络的接入和移动性管理功能网元接收所述第一网络的所述终端设备的第一配置网络切片选择辅助信息;
    所述终端设备删除与除所述第一网络外的其他网络关联的第二配置网络切片选择辅助信息;
    所述终端设备将存储的与所述第一网络关联的第三配置网络切片选择辅助信息替换为所述第一配置网络切片选择辅助信息。
  38. 如权利要求37所述的方法,其特征在于,还包括:
    所述终端设备从所述接入和移动性管理功能网元接收指示信息;
    其中,所述终端设备删除与除所述第一网络外的其他网络关联的第二配置网络切片选择辅助信息,包括:
    所述终端设备根据所述指示信息,删除与除所述第一网络外的其他网络关联的第二配置网络切片选择辅助信息。
  39. 根据权利要求38所述的方法,其特征在于,所述指示信息用于指示所述终端设备删除所述第二配置网络切片选择辅助信息。
  40. 如权利要求37至39任一项所述的方法,其特征在于,还包括:
    所述终端设备删除与所述其他网络关联的允许网络切片选择辅助信息。
  41. 如权利要求40所述的方法,其特征在于,还包括:
    所述终端设备从所述接入和移动性管理功能网元接收指示信息,所述指示信息用于指示所述终端设备删除所述第二配置网络切片选择辅助信息和允许网络切片选择辅助信息。
  42. 一种通信装置,用于执行如权利要求31-36任一项所述的方法。
  43. 一种通信装置,用于执行如权利要求37-41任一项所述的方法。
  44. 一种通信装置,其特征在于,包括:
    获取模块,用于从数据管理网元接收与终端设备的更新的签约网络切片选择辅助信息;根据所述更新的签约网络切片选择辅助信息,获取与第一网络关联的所述终端设备的第一配置网络切片选择辅助信息;
    发送模块,用于向所述终端设备发送所述第一配置网络切片选择辅助信息和指示信息,所述指示信息用于指示所述终端设备删除与除所述第一网络之外的其他网络关联的第二配置网络切片选择辅助信息。
  45. 如权利要求44所述的通信装置,其特征在于,
    所述获取模块用于根据所述更新的签约网络切片选择辅助信息,确定所述第一配置网络切片选择辅助信息;或者
    所述获取模块用于在接收所述更新的签约网络切片选择辅助信息后,从网络切片选择功能网元获取所述第一配置网络切片选择辅助信息。
  46. 如权利要求44或45所述的通信装置,其特征在于,所述通信装置确定所述第一配置网络切片选择辅助信息是基于所述更新的签约网络切片选择辅助信息获取的,所述发送模块向所述终端设备发送所述指示信息。
  47. 如权利要求44至46任一项所述的通信装置,其特征在于,所述发送模块用于向所述终端设备发送用户设备配置更新命令,所述用户设备配置更新命令包括所述第一配置网络切片选择辅助信息和所述指示信息。
  48. 如权利要求44至46任一项所述的通信装置,其特征在于,所述发送模块用于向所述终端设备发送注册接受消息,所述注册接受消息包括所述第一配置网络切片选择辅助信息和所述指示信息。
  49. 如权利要求44至48任一项所述的通信装置,其特征在于,所述通信装置包括位于所述第一网络的接入和移动性管理功能网元。
  50. 一种通信装置,其特征在于,包括:
    接收模块,用于从第一网络的接入和移动性管理功能网元接收所述第一网络的终端设备的第一配置网络切片选择辅助信息;
    处理模块,用于删除与除所述第一网络外的其他网络关联的第二配置网络切片选择辅助信息;将存储的与所述第一网络关联的第三配置网络切片选择辅助信息替换为所述第一配置网络切片选择辅助信息。
  51. 如权利要求50所述的通信装置,其特征在于,所述接收模块还用于从所述接入和移动性管理功能网元接收指示信息;
    所述处理模块用于根据所述指示信息,删除与除所述第一网络外的其他网络关联的第二配置网络切片选择辅助信息。
  52. 如权利要求51所述的通信装置,其特征在于,所述指示信息用于指示所述终端设备删除所述第二配置网络切片选择辅助信息。
  53. 如权利要求50至52任一项所述的通信装置,其特征在于,所述通信装置包括所述终端设备。
  54. 一种通信装置,其特征在于,包括:
    收发器,用于从数据管理网元接收终端设备的更新的签约网络切片选择辅助信息;
    处理器,用于根据所述更新的签约网络切片选择辅助信息,获取与第一网络关联 的所述终端设备的第一配置网络切片选择辅助信息;
    所述收发器还用于向所述终端设备发送所述第一配置网络切片选择辅助信息和指示信息,所述指示信息用于指示所述终端设备删除与除所述第一网络之外的其他网络关联的第二配置网络切片选择辅助信息。
  55. 如权利要求54所述的通信装置,其特征在于,
    所述处理器用于根据所述更新的签约网络切片选择辅助信息,确定所述第一配置网络切片选择辅助信息;或者
    所述处理器用于在所述收发器接收所述更新的签约网络切片选择辅助信息后,通过所述收发器从网络切片选择功能网元获取所述第一配置网络切片选择辅助信息。
  56. 如权利要求54或55所述的通信装置,其特征在于,所述处理器用于确定所述第一配置网络切片选择辅助信息是基于所述更新的签约网络切片选择辅助信息获取的,控制所述收发器向所述终端设备发送所述指示信息。
  57. 如权利要求54至56任一项所述的通信装置,其特征在于,所述收发器用于向所述终端设备发送用户设备配置更新命令,所述用户设备配置更新命令包括所述第一配置网络切片选择辅助信息和所述指示信息。
  58. 如权利要求54至56任一项所述的通信装置,其特征在于,所述收发器用于向所述终端设备发送注册接受消息,所述注册接受消息包括所述第一配置网络切片选择辅助信息和所述指示信息。
  59. 如权利要求54至58任一项所述的通信装置,其特征在于,所述通信装置包括位于所述第一网络的接入和移动性管理功能网元。
  60. 一种通信装置,其特征在于,包括:
    接收器,用于从第一网络的接入和移动性管理功能网元接收所述第一网络的终端设备的第一配置网络切片选择辅助信息;
    处理器,用于删除与除所述第一网络外的其他网络关联的第二配置网络切片选择辅助信息;将存储的与所述第一网络关联的第三配置网络切片选择辅助信息替换为所述第一配置网络切片选择辅助信息。
  61. 如权利要求60所述的通信装置,其特征在于,所述接收器还用于从所述接入和移动性管理功能网元接收指示信息;
    所述处理器用于根据所述指示信息,删除与除所述第一网络外的其他网络关联的第二配置网络切片选择辅助信息。
  62. 如权利要求61所述的通信装置,其特征在于,所述指示信息用于指示所述终端设备删除所述第二配置网络切片选择辅助信息。
  63. 如权利要求60至62任一项所述的通信装置,其特征在于,所述通信装置包括所述终端设备。
  64. 一种计算机可读存储介质,包括指令,当其在计算机上运行时,使得计算机执行如权利要求1至23,或31至41任意一项所述的方法。
  65. 一种通信系统,其特征在于,包括:
    数据管理网元,用于发送终端设备的更新的签约网络切片选择辅助信息;
    第一网络的接入和移动性管理功能网元,用于从所述数据管理网元接收所述更新 的签约网络切片选择辅助信息;根据所述更新的签约网络切片选择辅助信息,获取与所述第一网络关联的终端设备的第一配置网络切片选择辅助信息;向所述终端设备发送所述第一配置网络切片选择辅助信息和指示信息,所述指示信息用于指示所述终端设备删除与除所述第一网络之外的其他网络关联的第二配置网络切片选择辅助信息。
PCT/CN2019/072478 2018-04-09 2019-01-21 通信方法、装置和系统 Ceased WO2019196535A1 (zh)

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