WO2018148962A1 - 通信方法、用户设备和核心网络控制面设备 - Google Patents

通信方法、用户设备和核心网络控制面设备 Download PDF

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Publication number
WO2018148962A1
WO2018148962A1 PCT/CN2017/074088 CN2017074088W WO2018148962A1 WO 2018148962 A1 WO2018148962 A1 WO 2018148962A1 CN 2017074088 W CN2017074088 W CN 2017074088W WO 2018148962 A1 WO2018148962 A1 WO 2018148962A1
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Prior art keywords
core network
control plane
network control
plane device
request message
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PCT/CN2017/074088
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English (en)
French (fr)
Inventor
乔晓强
李岩
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华为技术有限公司
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Priority to PCT/CN2017/074088 priority Critical patent/WO2018148962A1/zh
Publication of WO2018148962A1 publication Critical patent/WO2018148962A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the present application relates to the field of communications, and more particularly to a communication method, user equipment (UE), and a core network control plane device.
  • UE user equipment
  • Network slicing is a new type of network and business model that can be customized to better meet the individual needs of consumers and businesses.
  • the network slicing technology divides a physical network into multiple network slicing instances.
  • Each network slicing instance performs customized tailoring of network functions and management of corresponding network functions according to the needs of the business scenario.
  • personalized needs include coverage area, duration, capacity, speed, latency, reliability, security, and availability.
  • Each network slice instance can be viewed as a core network architecture, and network slice instances can be applied to mobile broadband, multimedia, mass machine type communication, and critical machine type communication.
  • the UE can access a single slice or multiple slices, and the UE can simultaneously use different services provided by multiple slices.
  • a tenant-based approach is often used to provide services.
  • the core network selects a dedicated tenant common control network function (Tenant CCNF) device and a corresponding dedicated slice instance for a specific tenant to serve as a UE within the tenant.
  • Tenant CCNF tenant common control network function
  • Provide services Generally, the coverage area (or service area) of the tenant shared control network function device is limited.
  • the tenant-specific shared control network function device When the UE is located in the coverage area of the tenant-specific shared control network function device, the tenant-specific shared control network function device is preferentially The UE provides the service; and when the UE is located outside the coverage area of the tenant-specific shared control network function device, the operator common control network function (Operator CCNF) device provided by the operator provides the UE with the UE The corresponding service.
  • the operator common control network function (Operator CCNF) device provided by the operator provides the UE with the UE The corresponding service.
  • the current problem is that when the UE initially connects to the operator sharing control network function device and then moves to the coverage area of the tenant sharing control network function device, the operator shares the control network function device to provide the service, but cannot switch. Share control network function devices to tenants to use the tenant shared control network function device to provide better services.
  • the embodiment of the present application provides a communication method, a user equipment, and a core network control plane device, which can enable the core network to provide a superior service for the user equipment.
  • a communication method including: when a user equipment UE moves from a second service area to a first service area, the UE sends a location update request message to a target core network control plane device, where the target core network control The service area of the surface device includes the first service area;
  • the UE receives a location update request rejection message from the target core network control plane device, where the location update request rejection message includes first network slice selection assistance information and an implicit detach indication, the first network slice selection assistance information including identification information, The first network slice selection assistance information is used to select a identifier that can be identified by the identification information.
  • the first core network control plane device that provides a dedicated service to the tenant or user group to which the UE belongs;
  • the UE sends an attach request message to the first core network control plane device according to the implicit detachment indication to trigger the UE re-attachment process, where the attach request message includes the first network slice selection auxiliary information.
  • the target core network control plane device forces the UE to initiate a reattachment process to the first core network control plane device by rejecting the attach request of the UE.
  • the UE initiates a re-attachment process to the core network according to the indication of the target core network control plane device, and attaches to the first core network control plane device, so that the superior (or dedicated) service provided by the first core network control plane device can be used. .
  • the target core network control plane device is a second core network control plane device, and the service area of the second core network control plane device further includes the second service region.
  • the method further includes:
  • the UE receives an attach accept message from the second core network control plane device, and the attach accept message includes the identifier information.
  • the target core network control plane device is a third core network control plane device, and the service area of the third core network control plane device does not include the second service region.
  • the method further includes:
  • the UE sends an attach request message to the second core network control plane device in the service area including the second service area;
  • the UE receives an attach accept message from the second core network control plane device, and the attach accept message includes the identifier information.
  • the location update request message includes the identifier information.
  • a communication method including: receiving, by a target core network control plane device, a location update request message from a user equipment UE;
  • the target core network control plane device obtains the identifier information and the service area information according to the location update request message, where the service area information is used to indicate a service area of the first core network control plane device, where the first core network control plane device is A core network control plane device capable of providing a dedicated service to a tenant or group of users to which the UE is identified by the identification information;
  • the target core network control plane device determines, according to the identifier information and the service area information, that the UE is located in a service area of the first core network control plane device;
  • the target core network control plane device sends a location update request rejection message to the UE, where the location update request rejection message includes first network slice selection assistance information and an implicit detachment indication carrying the identification information, and the implicit detachment indication is used. Instructing the UE to initiate a re-attachment process, the first network slice selection assistance information is used to select the first core network control plane device.
  • the target core network control plane device identifies the UE according to the identity. Identification information of the tenant or user group to which it belongs and the service area of the first core network control plane device. The domain information can be determined that the UE is located in the service area of the first core network control plane device, thereby rejecting the attach request of the UE, and instructing the UE to initiate a re-attach procedure to the first core network control plane device.
  • the UE initiates a re-attachment process to the core network according to the indication of the target core network control plane device, and attaches to the first core network control plane device, so that the preferred service provided by the first core network control plane device can be used.
  • the location update request message includes the identifier information.
  • the target core network control plane device is a third core network control plane device
  • the service area of the third core network control plane device includes a first service region where the UE is currently located.
  • the target core network control plane device obtains the identifier information according to the location update request message, including:
  • the third core network control plane device sends a context request message to the second core network control plane device according to the location update request message, where the service area of the second core network control plane device includes the location where the UE sends the location update request message Second service area;
  • the third core network control plane device receives the context of the UE from the second core network control plane device, and the context of the UE includes the identifier information.
  • the target core network control plane device is a second core network control plane device, where the service area of the second core network control plane device includes the second before the UE sends the location update request message a service area, and the service area of the second core network control plane device does not include the first service area where the UE is currently located,
  • the method further includes:
  • the second core network control plane device receives an attach request message from the UE
  • the second core network control plane device obtains the identifier information according to the attach request message
  • the second core network control plane device sends an attach accept message to the UE, and the attach accept message includes the identifier information.
  • the second core network control plane device obtains the identifier information according to the attach request message, including:
  • the second core network control plane device obtains user subscription information from the user data manager according to the attach request message, and the user subscription information includes the identifier information.
  • the target core network control plane device obtains the service area information according to the location update request message, including:
  • the target core network control plane device obtains the service area information from the network slice selection function NSSF device according to the location update request message, or
  • the target core network control plane device obtains the service area information from the information preconfigured by the target core network control plane device according to the location update request message.
  • a third aspect provides a communication method, including: receiving, by a second core network control plane device, an attach request message from a user equipment UE;
  • the second core network control plane device obtains the identifier information according to the attach request message, where the identifier information is used to identify the tenant or user group to which the UE belongs;
  • the second core network control plane device sends an attach accept message to the UE.
  • the attach accept message includes the identifier information.
  • the method further includes:
  • the second core network control plane device receives a context request message from the third core network control plane device
  • the second core network control plane device sends the context of the UE to the third core network control plane device according to the context request message, where the context of the UE includes the identifier information.
  • a user equipment for performing the method of the first aspect or any possible implementation of the first aspect.
  • the user equipment comprises means for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • a core network control plane device for performing the method of any of the possible implementations of the second aspect or the second aspect.
  • the core network control plane device comprises means for performing the method of any of the second aspect or any of the possible implementations of the second aspect.
  • a core network control plane device for performing the method of any of the third or third possible implementations.
  • the core network control plane device comprises means for performing the method of any of the third aspect or any of the possible implementations of the third aspect.
  • a user equipment comprising a memory and a processor, the memory for storing a computer program, the processor for calling and running the computer program from the memory, such that the network device performs the first Aspects and methods in any of the possible implementations of the first aspect.
  • a core network control plane device comprising a memory and a processor, the memory for storing a computer program, the processor for calling and running the computer program from the memory, such that The user equipment performs the methods of any of the second and second possible implementations described above.
  • a core network control plane device comprising a memory and a processor, the memory for storing a computer program, the processor for calling and running the computer program from the memory, such that The user equipment performs the methods of any of the third and third possible implementations described above.
  • a computer readable storage medium for storing a computer program, the computer program comprising: the first aspect, the second aspect, and the third aspect, and the first, second, and third aspects The instructions of the method in any possible implementation.
  • a computer program product comprising instructions, when executed on a computer, causes the computer to perform the first, second and third aspects and the first, second and third aspects
  • the method in any possible implementation.
  • FIG. 1 shows a schematic diagram of a multi-slice architecture for tenants according to an embodiment of the present application.
  • FIG. 2 shows a schematic flow chart of a communication method according to an embodiment of the present application.
  • FIG. 3 shows a schematic flow chart of a communication method in accordance with an embodiment of the present application.
  • FIG. 4 shows a schematic flow chart of a communication method in accordance with an embodiment of the present application.
  • FIG. 5 shows a schematic flow chart of a communication method according to another embodiment of the present application.
  • FIG. 6 shows a schematic flow chart of a communication method according to still another embodiment of the present application.
  • FIG. 7 is a schematic block diagram showing a user equipment according to an embodiment of the present application.
  • FIG. 8 is a schematic block diagram showing a core network control plane device according to an embodiment of the present application.
  • FIG. 9 is another schematic block diagram showing a user equipment according to an embodiment of the present application.
  • FIG. 10 is another schematic block diagram showing a core network control plane device 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 wireless
  • GPRS General Packet Radio Service
  • LTE long term evolution
  • the user equipment may also be referred to as a mobile terminal (Mobile Terminal), a mobile user equipment, etc., and may communicate with one or more core networks via a radio access network (RAN), and the user equipment may be a mobile terminal.
  • RAN radio access network
  • the user equipment may be a mobile terminal.
  • a mobile phone or "cellular" phone
  • a computer with a mobile terminal for example, can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language with the wireless access network and / or data.
  • Figure 1 shows a schematic diagram of a multi-slice architecture for tenants.
  • the network element functions involved in the architecture shown in Figure 1 are as follows:
  • the RAN node 102 is a part of the mobile communication system, establishes a wireless connection with the UE, and implements interworking between the UE and the core network (for example, a core network control plane device).
  • the core network for example, a core network control plane device
  • the network slice selection function (NSSF) device 103 selects a corresponding CCNF (common core network function) device for the UE according to the identifier information of the tenant or the user group to which the UE belongs (for example, the operator CCNF device or the tenant CCNF) And the NSSF device has deployment location information of all CCNF devices, and can determine whether the UE enters the service area of the tenant CCNF device.
  • CCNF common core network function
  • Tenant CCNF device 107 A tenant core network sharing control plane that provides services for a specific tenant or group of users, including a shared core network control plane function of one or more slices that the UE belonging to the tenant or user group needs to connect, and At least the access and mobility management function (AMF) is included. It should be noted that the CCNF device described in this application can be replaced by an AMF device.
  • Carrier CCNF device 106 The shared core network control plane provided by the operator provides services for UEs that do not belong to a specific tenant or user group, and UEs that belong to a specific tenant or user group but are not in the coverage area of the tenant CCNF device. .
  • Core network slice instance (core network slice instance #1 to core network slice instance #3): flexibly provide one or more network services according to the needs of the slice demand side, including the proprietary shared control plane network function device within the slice And user-side network function devices.
  • the core network slice instance can be simply referred to as a slice.
  • the functionality of the NSSF device can be integrated into the CCNF device.
  • the CCNF device that integrates the functions of the NSSF device has deployment location information of other CCNF devices, and can determine whether the UE has entered the service area of the tenant CCNF device.
  • the corresponding tenant CCNF device can be selected for the UE according to related information such as the tenant or the user group identifier.
  • the multi-slice architecture shown in FIG. 1 generally has a limited coverage area (or service area) of the tenant CCNF device 107.
  • the UE When the UE is located in the coverage area of the tenant CCNF device 107, the UE preferentially communicates with the RAN node 102.
  • the tenant CCNF device 107 is interworking, and the core network slice instance #2 and the core network slice instance #3 provide services for the UE with the service/slice type being #A and the service/slice type being #B.
  • the UE communicates with the operator CCNF device 106 via the RAN node 102, and the core network slice instance #1 provides the service with the service/slice type #A for the UE.
  • the current problem is that when the UE 101 initially connects to the operator CCNF device 106 and then moves to the coverage area of the tenant CCNF device 107, it is still served by the operator CCNF device 106, and cannot be switched to the tenant CCNF device. 107.
  • the tenant CCNF device 107 provides a superior service for it.
  • the present application provides a communication method, so that when an area where a UE is served by an operator CCNF device moves to a service area of a tenant CCNF device, the UE can switch to a tenant CCNF device, which is better provided by the tenant CCNF device. Service.
  • the first core network control plane device described hereinafter may be a tenant CCNF device
  • the second core network control plane device and the third core network control plane device may be an operator CCNF device.
  • the solution of the present application may select a suitable CCNF device for a UE belonging to a specific tenant or a group of users.
  • the carrier device CCNF provides the service.
  • the UE is located in the coverage area of the tenant CCNF device, it is served by the tenant CCNF device if there are no other restrictions.
  • the UEs described below all refer to UEs belonging to a specific tenant or group of users.
  • tenant CCNF device is only one example of the first core network control plane device
  • carrier device CCNF is only an example of the second core network control panel and the third core network control panel device
  • present application is equally applicable to other Conditional CCNF equipment.
  • FIG. 2 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the second service area belongs to the service area of the second core network control plane device, or the second service area belongs to the area where the second core network control plane device provides the service.
  • the first attach request message sent by the UE is forwarded to the second core network control plane device by the first RAN node.
  • the first attach request message may carry the second network slice selection assistance information.
  • the second network slice selection assistance information may include one or a set of slice (or service) type information (Service/Slice Type) information, and the second network slice selection assistance information may indicate that the UE is expected to be the core network device.
  • the one or a set of slice types may be enhanced mobile broadband (eMBB) slices, or ultra-low latency and reliable communications (ULLRC) slices, or large-scale Internet of Things (massive IoT, mIoT) slice and so on.
  • the first RAN node may forward the first attach request message to the second core network control plane device according to the second network slice selection auxiliary information.
  • the second core network control plane device obtains the identifier information according to the first attach request message.
  • the identifier information is used to identify a tenant or a user group to which the UE belongs.
  • the UE may obtain user subscription information by querying a User Data Management.
  • the user subscription information includes the identifier information.
  • the second core network control plane device sends an attach accept message to the UE when accepting the attach request of the UE.
  • the UE performs subsequent signaling interaction of the attach procedure with the second core network control plane device via the first RAN node.
  • the attach accept message may include third network slice selection assistance information and identification information acquired in S220.
  • the third network slice selection assistance information is used to indicate, by the second core network control plane device, the core network that is determined according to the subscription information of the UE, to one or a group of slice types that the UE can use.
  • the core network is authorized to the UE
  • the one or a set of slice types to be used may be part or all of one or a set of slice types requested by the UE.
  • the service area of the target core network control plane device includes a first service area.
  • the movement of the UE occurs within the service area of the second core network control plane device.
  • the service area of the second core network control plane device further includes a second service area.
  • the target core network control plane device is the second core network control plane device
  • the location update request message sent by the UE is received by the first RAN node, and the first RAN node may select the auxiliary information according to the second network slice, for example.
  • the update request message is forwarded to the second core network control plane device.
  • the mobility of the UE occurs between the service areas of the two core network control plane devices, and the UE moves from the service area of the second core network control plane device to the service area of the third core network control plane device.
  • the service area of the third core network control plane device includes the first service area but does not include the second service area.
  • the target core network control plane device is the third core network control plane device, and the location update request message sent by the UE is received by the second RAN node, and the second RAN node may select the auxiliary information according to the second network slice, for example.
  • the update request message is forwarded to the third core network control plane device.
  • the location update request message may include identifier information, where the identifier information is used to identify a tenant or a user group to which the UE belongs.
  • the first service area is located in the service area of the third core network control plane device and the area where the first core network control plane device can provide services. It should be understood that when the UE is located in the first service area and attached to the first core network control plane device, the first core network control plane device can provide a dedicated service for the tenant or group of users to which the UE belongs.
  • the service area of the first core network control plane device is smaller than the service area of the second core network control plane device or the third core network control plane device, but the embodiment of the present application does not specifically limit this.
  • the target core network control plane device obtains the identifier information and the service area information according to the location update request message.
  • the location update request message may carry the identifier information
  • the target core network control plane device may obtain the identifier information by using a location update request message.
  • the target core network control plane device may also obtain the identifier information by using a context of the UE. It should be understood that this approach is primarily directed to Case 2 described in S240.
  • the third core network control plane device may send a context request message to the second core network control plane device to request the identifier information. And the second core network control plane device sends the UE context including the identifier information to the third core network control plane device according to the context request message, and the third core network control plane device obtains the identifier after obtaining the UE context. information.
  • the location update request message may include the foregoing third network slice selection assistance information.
  • the service area information can be used to indicate a service area of the first core network control plane device.
  • the network slice selection function NSSF device and the core network control plane device may be deployed separately. That is to say, the NSSF device with NSSF and the core network control plane device can be separately deployed in the system.
  • the target core network control plane device can obtain the service area information from the NSSF device.
  • the NSSF device stores the correspondence between the identification information of the tenant to which the UE belongs, the core network control plane device capable of providing the dedicated service to the tenant to which each UE belongs, and the service area information of the core network control plane device. .
  • the NSSF device can obtain the service area information of the first core network control plane device according to the target core network control plane device or the identifier information provided by the UE and the corresponding relationship.
  • the NSSF device can then send the service area information to the target core network control plane device.
  • the NSSF may also be deployed on a core network control plane device (for example, a second core network control plane device or a third core network control plane device).
  • a core network control plane device for example, a second core network control plane device or a third core network control plane device.
  • the core network control plane device itself stores the identification information of the tenant to which the multiple UE belongs, the core network control plane device capable of providing the dedicated service to the tenant to which each UE belongs, and the service area information of the core network control plane device.
  • the target core network control plane device for example, the second core network control plane device or the third core network control plane device, can obtain the service area information of the first core network control plane device according to the identifier information and the corresponding relationship.
  • the target core network control plane device determines, according to the identifier information and the service area information, that the UE is located in a service area of the first core network control plane device.
  • the target core network control plane device can determine that the UE is located in the service area of the first core network control plane device according to the service area information, that is, the service area information of the first core network control plane device.
  • the target core network control plane device sends a location update request rejection message to the UE.
  • the location update request reject message includes first network slice selection assistance information and an implicit separation identifier.
  • the first network slice selection assistance information includes the identifier information used to identify a tenant or a user group to which the UE belongs.
  • the first network slice selection assistance information may further include one or a group of slice type information of the tenant or the user group to which the UE belongs, and the one or a group of slice type information may be combined with one of the second network slice selection auxiliary information. Or a set of slice type information is the same.
  • the information carried in the first network slice selection auxiliary information may be the same as the information carried in the second network slice selection auxiliary information, and may be different, and the comparison in the embodiment of the present application is not specifically limited.
  • the UE sends a second attach request message (ie, another instance of the attach request message) to the core network.
  • the UE After receiving the location update request rejection message sent by the target core network control plane device, the UE rejects the implicit separation identifier carried by the message according to the location update request, and triggers the reattachment process. At this time, the UE sends a second attach request message.
  • the second attach request message includes the first network slice selection assistance information.
  • the second RAN node selects the first core network control plane device according to the identifier information in the first network slice selection auxiliary information. The second attach request message is forwarded to the first core network control plane device.
  • the UE performs subsequent signaling interaction with the first core network control plane device to attach to the first core network control plane device, and uses the preferred service provided by the first core network control plane device.
  • the target core network control plane device identifies the UE according to the identity.
  • the identification information of the associated tenant or user group and the service area information of the first core network control plane device can determine that the UE is located in the service area of the first core network control plane device, thereby rejecting the UE attach request, and indicating
  • the UE initiates a reattachment process to the first core network control plane device.
  • UE according to the target core The indication of the network control plane device initiates a reattachment process to the core network and attaches to the first core network control plane device, thereby enabling the use of the superior service provided by the first core network control plane device.
  • the first RAN node and the second RAN node in the above may be the same node. If the RAN node currently accessed by the UE can only establish a connection with one of the second core network control plane device and the third core network control plane device, the first RAN node and the second RAN node are two different nodes. If the RAN node currently accessed by the UE can establish a connection with the second core network control plane device and establish a connection with the third core network control plane device, the second RAN node and the first RAN node are the same node.
  • the first RAN node and the second RAN node will not be distinguished in detail, but are collectively described as a RAN node. It will be understood by those skilled in the art that the RAN node described hereinafter corresponds to the first RAN node or the second RAN node, respectively.
  • the second core network control plane device and the third core network control plane device both integrate the NSSF or the function of integrating the NSSF device.
  • the target core network control plane device (the second core network control plane device or the third core network control plane device) may determine, according to the identifier information, that the UE enters the service area of the first core network control plane device.
  • FIG. 3 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the UE sends a first attach request message (ie, an example of an attach request message) to the core network when the UE is located in the service area of the second core network control plane device, that is, the second service area.
  • a first attach request message ie, an example of an attach request message
  • the UE sends a first attach request message and forwards it to the second core network control plane device via the RAN node.
  • the first attach request message may carry the second network slice selection assistance information.
  • the second network slice selection assistance information is specifically referred to the above description, and the RAN node may forward the first attachment request message to the second core network control plane device according to the second network slice selection assistance information.
  • the second core network control plane device acquires user subscription information from the user data manager according to the first attach request message.
  • the user subscription information includes identifier information for identifying a tenant or a user group to which the UE belongs.
  • the second core network control plane device may send an identity information request message to the user data manager according to the first attach request message.
  • the identification information request message is used to request the identification information.
  • the user data manager sends the user subscription information including the identification information to the second core network control plane device according to the identification information request message.
  • the second core network control plane device sends an attach accept message to the UE.
  • the attach accept message may include the identification information and third network slice selection assistance information.
  • third network slice selection assistance information For the third network slice selection assistance information, reference may be made to the above description, and details are not described herein for brevity.
  • the UE performs subsequent signaling interaction of the attach procedure with the second core network control plane device via the RAN node.
  • the UE performs subsequent signaling interaction of the attach procedure with the second core network control plane device via the RAN node.
  • the UE sends a location update request message to the core network.
  • the UE sends a Location Update Request message to the third core network control plane via the RAN node.
  • the location update request message may include the foregoing third network slice selection assistance information.
  • the third core network control plane device determines, according to the identifier information in the location update request message and the service area information of the first core network control plane device, that the UE is located in a service area of the first core network control plane device.
  • the third core network control plane device sends a location update request rejection message to the UE.
  • the location update request reject message includes first network slice selection assistance information and an implicit separation identifier.
  • the first network slice selection assistance information includes the identifier information used to identify a tenant or a user group to which the UE belongs.
  • the first network slice selection auxiliary information further includes one or a group of slice types, which may be specifically referred to above, and is not described herein again for brevity.
  • the UE sends a second attach request message (ie, another instance of the attach request message) to the core network.
  • the UE after receiving the location update request rejection message sent by the third core network control plane device, the UE sends a second attach request message according to the implicitly separated identifier carried in the location update request rejection message.
  • the second attach request message includes the first network slice selection assistance information.
  • the RAN node selects the auxiliary information according to the first network slice, and forwards the second attach request message to the first core network control plane device.
  • the UE performs subsequent signaling interaction with the first core network control plane device to attach to the first core network control plane device to use the preferred service provided by the first core network control plane device.
  • the UE will control the surface device to the second core network.
  • a location update request message is sent.
  • the operation related to the third core network control plane device is performed by the second core network control plane device.
  • the third core network control plane device (for example, the operator CCNF device) according to the identifier
  • the identification information of the tenant or the user group to which the UE belongs and the service area information of the first core network control plane device can determine that the UE is located in the service area of the first core network control plane device, thereby rejecting the UE attach request, and Instructing the UE to initiate a reattachment process to the core network.
  • the UE initiates a re-attachment process to the core network according to the indication of the third core network control plane device, and attaches to the first core network control plane device, so that the preferred service provided by the first core network control plane device can be used.
  • FIG. 4 is a schematic flow chart of a communication method according to an embodiment of the present application.
  • the UE sends a first attach request message (ie, an example of an attach request message) to the core network when the UE is located in the service area of the second core network control plane device, that is, the second service area.
  • a first attach request message ie, an example of an attach request message
  • the UE sends a first attach request message and forwards it to the second core network control plane device via the RAN node.
  • the first attach request message may carry the second network slice selection assistance information.
  • the second network slice selection assistance information is specifically referred to the above description, and the RAN node may forward the first attachment request message to the second core network control plane device according to the second network slice selection assistance information.
  • the second core network control plane device acquires user subscription information from the user data manager according to the first attach request message.
  • the user subscription information includes the identifier information.
  • the second core network control plane device may send an identity information request message to the user data manager according to the first attach request message.
  • the identification information request message is used to request the identification information.
  • the user data manager sends the user subscription information including the identification information to the second core network control plane device according to the identification information request message.
  • the second core network control plane device sends an attach accept message to the UE.
  • the attach accept message includes the identification information and third network slice selection assistance information.
  • the third network slice selection assistance information is a one or a group of slice types that the core network control plane device determines to be used by the core network according to the subscription information of the UE, and may be carried by the second network slice selection auxiliary information.
  • the information is the same or it can be different.
  • the UE performs subsequent signaling interaction of the attach procedure with the second core network control plane device via the RAN node.
  • the UE performs subsequent signaling interaction of the attach procedure with the second core network control plane device via the RAN node.
  • the UE sends a location update request message to the core network.
  • the UE sends a Location Update Request message to the third core network control plane via the RAN node.
  • the location update request message may include the foregoing third network slice selection assistance information.
  • the third core network control plane device sends a context request message to the second core network control plane device.
  • the second core network control plane device After receiving the context request message, the second core network control plane device sends the UE context to the third core network control plane device.
  • the UE context includes identification information for identifying a tenant or a group of users to which the UE belongs.
  • the third core network control plane device may determine, according to the identifier information in the location update request message and the service area information of the first core network control plane device, that the UE is located in a service area of the first core network control plane device.
  • the third core network control plane device sends a location update request rejection message to the UE.
  • the location update request reject message includes first network slice selection assistance information and an implicit separation identifier.
  • the first network slice selection assistance information includes the identifier information used to identify a tenant or a user group to which the UE belongs.
  • the first network slice selection assistance information may further include one or a group of slice types, which may be specifically referred to above.
  • the UE sends a second attach request message (ie, another instance of the attach request message) to the core network.
  • the UE after receiving the location update request rejection message sent by the third core network control plane device, the UE sends a second attach request message according to the implicitly separated identifier carried in the location update request rejection message.
  • the second attach request message includes the first network slice selection assistance information.
  • the RAN node After receiving the second attach request message, the RAN node forwards the second attach request message to the first core network control plane device according to the identifier information in the first network slice selection auxiliary information.
  • the UE performs subsequent signaling interaction with the first core network control plane device to attach to the first core network control plane device to use the preferred service provided by the first core network control plane device.
  • the third core network control plane device (for example, the operator CCNF device) according to the The identifier information of the tenant or user group to which the UE belongs and the service area information of the first core network control plane device obtained by the second core network control plane device can determine that the UE is located in the service area of the first core network control plane device. Therefore, the UE's attach request is rejected, and the UE is instructed to initiate a re-attachment process to the core network.
  • the UE initiates a re-attachment process to the core network according to the indication of the third core network control plane device, and attaches to the first core network control plane device, so that the preferred service provided by the first core network control plane device can be used.
  • the NSSF device, the second core network control plane device, and the third core network control plane device are respectively deployed as independent devices.
  • FIG. 5 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the UE sends a first attach request message (ie, an example of an attach request message) to the core network device when the UE is located in the service area of the second core network control plane device, that is, the second service area.
  • a first attach request message ie, an example of an attach request message
  • the UE sends a first attach request message, and the second core network control plane device is forwarded by the RAN node.
  • the first attach request message may carry the second network slice selection assistance information.
  • the second network slice selection assistance information is specifically referred to the above description.
  • the RAN node forwards the first attach request message to the second core network control plane device according to the second network slice selection assistance information.
  • the RAN node may forward the first attach request message to The NSSF device, the NSSF selects the second core network control plane device for the UE, and forwards the first attach request message to the second core network control plane device, or instructs the RAN node to forward the first attach request message to the second core network control plane device.
  • a suitable core network control plane device ie, a CCNF device or an AMF device
  • the second core network control plane device obtains user subscription information from the user data manager according to the first attach request message.
  • the user subscription information includes the identifier information.
  • the second core network control plane device may send an identity information request message to the user data manager according to the first attach request message.
  • the identification information request message is used to request the identification information.
  • the user data manager sends the user subscription information including the identification information to the second core network control plane device according to the identification information request message.
  • the second core network control plane device sends an attach accept message to the UE.
  • the attach accept message includes the identification information and third network slice selection assistance information.
  • third network slice selection auxiliary information For the third network slice selection auxiliary information, reference may be made to the above description, and details are not described herein for brevity.
  • the UE performs subsequent signaling interaction of the attach procedure with the second core network control plane device via the RAN node.
  • the UE performs subsequent signaling interaction of the attach procedure with the second core network control plane device via the RAN node.
  • the UE sends a location update request message to the core network.
  • the location update request message may include the foregoing third network slice selection assistance information.
  • the UE sends a location update request message to the NSSF device via the RAN node.
  • the NSSF device determines the service area information corresponding to the identifier information according to the identifier information carried in the location update request. Then, the NSSF device attaches the service area information to the location update request message, and transmits a location update request message including the service area information to the third core network control plane device.
  • the NSSF device may directly forward the location update request message sent by the UE to the third core network control plane device. Then, the third core network control plane device obtains the service area information from the NSSF device according to the identifier information in the location update request message.
  • the third core network control plane device may determine, according to the identifier information in the location update request message and the service area information of the first core network control plane device, that the UE is located in a service area of the first core network control plane device. .
  • the third core network control plane device sends a location update request reject message to the UE.
  • the location update request reject message includes first network slice selection assistance information and an implicit separation identifier.
  • the first network slice selection assistance information includes the identifier information used to identify a tenant or a user group to which the UE belongs.
  • the first network slice selection auxiliary information may further include one or a group of slice types, specifically Reference can be made to the above description.
  • the UE sends a second attach request message (ie, another example of the attach request message) to the core network.
  • a second attach request message ie, another example of the attach request message
  • the UE after receiving the location update request rejection message sent by the third core network control plane device, the UE sends a second attach request message according to the implicitly separated identifier carried in the location update request rejection message.
  • the second attach request message includes the first network slice selection assistance information.
  • the RAN node selects the auxiliary information according to the first network slice, and forwards the second attach request message to the first core network control plane device.
  • the UE performs subsequent signaling interaction with the first core network control plane device.
  • the UE can attach to the first core network control plane device to use the superior service provided by the first core network control plane device.
  • the UE will send a location update request message to the core network.
  • the operation related to the third core network control plane device is performed by the second core network control plane device.
  • the third core network control plane device for example, the operator CCNF device
  • the third core network control plane device determines, according to the identifier information of the tenant or the user group to which the UE belongs, and the service area information of the first core network control plane device, that the UE is located in the service area of the first core network control plane device, thereby rejecting the attachment of the UE Request and instruct the UE to initiate a reattachment process to the core network.
  • the UE initiates a re-attachment process to the core network according to the indication of the third core network control plane device, and attaches to the first core network control plane device, so that the preferred service provided by the first core network control plane device can be used.
  • FIG. 6 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • the UE sends a first attach request message (ie, an example of an attach request message) to the core network when the UE is located in the service area of the second core network control plane device, that is, the second service area.
  • a first attach request message ie, an example of an attach request message
  • the UE sends a first attach request message and forwards it to the second core network control plane device via the RAN node.
  • the first attach request message may carry the second network slice selection assistance information.
  • the second network slice selection assistance information is specifically referred to the above description, and the RAN node may forward the first attachment request message to the second core network control plane device according to the second network slice selection assistance information.
  • the RAN node may forward the first attach request message to The NSSF device, the NSSF selects the second core network control plane device for the UE, and forwards the first attach request message to the second core network control plane device, or instructs the RAN node to forward the first attach request message to the second core network control plane device.
  • a suitable core network control plane device ie, a CCNF device or an AMF device
  • the second core network control plane device acquires user subscription information from the user data manager according to the first attach request message.
  • the user subscription information includes the identifier information.
  • the second core network control plane device may send an identity information request message to the user data manager according to the first attach request message.
  • the identification information request message is used to request the identification information.
  • the user data manager sends the user subscription information including the identification information to the second core network control plane device according to the identification information request message.
  • the second core network control plane device sends an attach accept message to the UE.
  • the attach accept message includes the identification information and third network slice selection assistance information.
  • the third network slice selection assistance information is a one or a group of slice types that the core network control device determines, according to the subscription information of the UE, that the core network can use to the UE. For details, refer to the foregoing description.
  • the third network slice selection auxiliary information may be the same as or different from the information carried by the second network slice selection auxiliary information.
  • the UE performs subsequent signaling interaction of the attach procedure with the second core network control plane device via the RAN node.
  • the UE performs subsequent signaling interaction of the attach procedure with the second core network control plane device via the RAN node.
  • the UE sends a location update request message to the core network.
  • the location update request message may include the foregoing third network slice selection assistance information.
  • the UE sends a location update request message, and the NSSF device is forwarded by the RAN node, and then forwarded by the NSSF device to the third core network control plane.
  • the third core network control plane device sends a context request message to the second core network control plane device to request identifier information for identifying a tenant or a user group to which the UE belongs.
  • the second core network control plane device After receiving the context request message, the second core network control plane device sends the UE context to the third core network control plane device.
  • the UE context includes identification information for identifying a tenant or a group of users to which the UE belongs.
  • the third core network control plane device obtains the service area information corresponding to the identifier information, that is, the service area information of the first core network control plane device, from the NSSF device according to the identifier information.
  • the third core network control plane device may determine, according to the identifier information in the location update request message and the service area information of the first core network control plane device, that the UE is located in a service area of the first core network control plane device. .
  • the third core network control plane device sends a location update request rejection message to the UE.
  • the location update request reject message includes first network slice selection assistance information and an implicit separation identifier.
  • the first network slice selection assistance information includes the identifier information used to identify a tenant or a user group to which the UE belongs. Furthermore, the first network slice selection assistance information may also include one or a set of slice types, for example, as described above.
  • the UE sends a second attach request message (ie, another instance of the attach request message) to the core network.
  • the UE after receiving the location update request rejection message sent by the third core network control plane device, the UE sends a second attach request message according to the implicitly separated identifier carried in the location update request rejection message.
  • the second attach request message includes the first network slice selection assistance information.
  • the RAN node selects the auxiliary information according to the first network slice, and forwards the second attach request message to the first core network control plane device.
  • the UE performs subsequent signaling interaction with the first core network control plane device to attach to the first core network control plane device to use the preferred service provided by the first core network control plane device.
  • the third core network control plane device (for example, the operator CCNF device) according to the The identifier information of the tenant or user group to which the UE belongs and the service area information of the first core network control plane device obtained by the second core network control plane device can determine that the UE is located in the service area of the first core network control plane device. Therefore, the UE's attach request is rejected, and the UE is instructed to initiate a re-attachment process to the core network.
  • the UE initiates a re-attachment process to the core network according to the indication of the third core network control plane device, and attaches to the first core network control plane device, so that the preferred service provided by the first core network control plane device can be used.
  • the communication method according to the embodiment of the present application has been described in detail above with reference to FIGS. 2 through 6.
  • a communication device according to an embodiment of the present application will be described in detail with reference to FIGS. 7 through 10, wherein the communication device includes a user equipment and a core network control plane device.
  • FIG. 7 shows a schematic block diagram of a user equipment 700 in an embodiment of the present application.
  • the user equipment 700 includes: a sending unit 710 and a receiving unit 720.
  • the sending unit 710 is configured to: when the user equipment UE moves from the second service area to the first service area, send a location update request message to the target core network control plane device, where the service area of the target core network control plane device includes the first Service Area;
  • the receiving unit 720 is configured to receive, by the target core network control plane device, a location update request rejection message, where the location update request rejection message includes first network slice selection assistance information and an implicit detach indication, the first network slice selection auxiliary information Including the identifier information, the first network slice selection assistance information is used to select a first core network control plane device capable of providing a dedicated service for a tenant or a user group to which the UE is identified by the identifier information;
  • the sending unit 710 is further configured to send an attach request message to the first core network control plane device according to the implicit detach indication to trigger a reattachment process of the UE, where the attach request message includes the first network slice selection Supplementary information.
  • the target core network control plane device is a second core network control plane device, and the service area of the second core network control plane device further includes the second service region.
  • the sending unit 710 is further configured to send an attach request message to the second core network control plane device;
  • the receiving unit 720 is further configured to receive an attach accept message from the second core network control plane device, where the attach accept message includes the identifier information.
  • the target core network control plane device is a third core network control plane device, and the service area of the third core network control plane device does not include the second service region.
  • the sending unit 710 is further configured to send an attach request message to the second core network control plane device of the service area including the second service area;
  • the receiving unit 720 is further configured to receive an attach accept message from the second core network control plane device, where the attach accept message includes the identifier information.
  • the location update request message includes the identifier information.
  • the user equipment 700 may correspond to the user equipment UE described in the foregoing method, and each module or unit in the user equipment 700 is used to perform each action or process performed by the UE in the foregoing method, where The details are omitted.
  • FIG. 8 shows a schematic block diagram of a core network control plane device 800 of an embodiment of the present application.
  • the core network control plane device 800 includes a receiving unit 810, a processing unit 820, and a transmitting unit 830.
  • the receiving unit 810 is configured to receive a location update request message from the user equipment UE.
  • the processing unit 820 is configured to obtain the identifier information and the service area information according to the location update request message, where the service area information is used to indicate a service area of the first core network control plane device, where the first core network control plane device is capable a core network control plane device that provides a dedicated service for the tenant or group of users to which the UE belongs as identified by the identification information;
  • the processing unit 820 is further configured to determine, according to the identifier information and the service area information, that the UE is located in a service area of the first core network control plane device;
  • the sending unit 830 is configured to send a location update request rejection message to the UE, where the location update request rejection message includes first network slice selection assistance information and an implicit detachment indication carrying the identification information, where the implicit detachment indication is used Instructing the UE to initiate a reattachment process, the first network slice selection assistance information being used to select the first core network control plane device.
  • the location update request message includes the identifier information.
  • the core network control plane device is a second core network control plane device, where the service area of the second core network control plane device includes the second service area before the UE sends the location update request message, and the The service area of the second core network control plane device does not include the first service area where the UE is currently located.
  • the receiving unit 810 is further configured to receive an attach request message from the UE;
  • the processing unit 820 is further configured to acquire the identifier information according to the attach request message.
  • the sending unit 830 is further configured to send an attach accept message to the UE, where the attach accept message includes the identifier information.
  • the core network control plane device is a third core network control plane device, and the service area of the third core network control plane device includes a first service area where the UE is currently located.
  • the sending unit 830 is further configured to send a context request message to the second core network control plane device according to the location update request message, where the service area of the second core network control plane device includes the location where the UE sends the location update request message Second service area;
  • the receiving unit 810 is further configured to receive a context of the UE from the second core network control plane device, where the context of the UE includes the identifier information.
  • processing unit 820 is specifically configured to:
  • the user subscription information is obtained from the user data manager, and the user subscription information includes the identifier information.
  • processing unit 820 is specifically configured to:
  • the core network control plane device 800 may correspond to the target core network control plane device described in the foregoing method, and each module or unit in the core network control plane device 800 is used for Performing the actions or processes performed by the target core network control plane device in the above method.
  • each module or unit in the core network control plane device 800 is used for Performing the actions or processes performed by the target core network control plane device in the above method.
  • a detailed description thereof will be omitted.
  • the receiving unit 810 is configured to receive an attach request message from the user equipment UE.
  • the processing unit 820 is configured to obtain, according to the attach request message, identifier information, where the identifier information is used to identify a tenant or a user group to which the UE belongs;
  • the sending unit 830 is configured to send an attach accept message to the UE.
  • the attach accept message includes the identification information.
  • the receiving unit 810 the receiving unit 810
  • the sending unit 830 is further configured to send the message to the third core network control plane device according to the context request message.
  • the context of the UE the context of the UE including the identification information.
  • the core network control plane device 800 may correspond to the second core network control plane device described in the foregoing method, and at this time, each module or unit in the core network control plane device 800 They are respectively used to perform various actions or processes performed by the second core network control plane device in the above method.
  • each module or unit in the core network control plane device 800 They are respectively used to perform various actions or processes performed by the second core network control plane device in the above method.
  • a detailed description thereof will be omitted.
  • FIG. 9 shows a schematic structural diagram of a user equipment 900 according to an embodiment of the present application.
  • the user equipment 900 includes a transceiver 910, a processor 920, and a memory 930.
  • the transceiver 910, the processor 920, and the memory 930 communicate with each other through an internal connection path to transfer control and/or data signals.
  • the transceiver 910 is configured to: when the user equipment UE moves from the second service area to the first service area, send a location update request message to the target core network control plane device, where the service area of the target core network control plane device includes the first a service area; receiving, from the target core network control plane device, a location update request rejection message, where the location update request rejection message includes first network slice selection assistance information and an implicit detach indication, the first network slice selection assistance information including identification information
  • the first network slice selection assistance information is used to select a first core network control plane device capable of providing a dedicated service for a tenant or a user group to which the UE identified by the identifier information belongs; according to the implicit detach indication
  • the first core network control plane device sends an attach request message to trigger a reattachment process of the UE, where the attach request message includes the first network slice selection assistance information.
  • the target core network control plane device is a second core network control plane device, and the service area of the second core network control plane device further includes the second service region.
  • the transceiver 910 is further configured to send an attach request message to the second core network control plane device, and receive an attach accept message from the second core network control plane device, where the attach accept message includes the identifier information.
  • the target core network control plane device is a third core network control plane device, and the service area of the third core network control plane device does not include the second service region.
  • the transceiver 910 is further configured to send an attach request message to a second core network control plane device of the service area including the second service area, and receive an attach accept message from the second core network control plane device, where the attach accept message includes the Identification information.
  • the location update request message includes the identifier information.
  • the user equipment 900 may correspond to the UE described in the above method.
  • the processor 920 calls and runs the computer program from the memory, the processor 920 can be used to perform the method of the embodiment shown in FIG. 2 to FIG. 6 and implement the functions of the UE in the embodiment shown in FIG. 2 to FIG. .
  • FIG. 10 shows a schematic structural diagram of a core network control plane device 1000 according to an embodiment of the present application.
  • the core network control plane device 1000 includes a transceiver 1010, a processor 1020, and a memory 1030.
  • the transceiver 1010, the processor 1020, and the memory 1030 communicate with each other through an internal connection path to transfer control and/or data signals.
  • the transceiver 1010 is configured to receive a location update request message from the user equipment UE.
  • the processor 1020 is configured to obtain the identifier information and the service area information according to the location update request message, where the service area information is used to indicate a service area of the first core network control plane device, where the first core network control plane device is capable of a core network control plane device that provides a dedicated service for the tenant or group of users to which the UE belongs as identified by the identification information;
  • the processor 1020 is further configured to determine, according to the identifier information and the service area information, that the UE is located in the first Within the service area of the core network control plane device;
  • the transceiver 1010 is further configured to send a location update request rejection message to the UE, where the location update request rejection message includes first network slice selection assistance information and an implicit detachment indication carrying the identification information, the implicit detach indication And configured to instruct the UE to initiate a re-attachment process, where the first network slice selection assistance information is used to select the first core network control plane device.
  • the location update request message includes the identifier information.
  • the core network control plane device is a second core network control plane device, where the service area of the second core network control plane device includes the second service area before the UE sends the location update request message, and the The service area of the second core network control plane device does not include the first service area where the UE is currently located.
  • the transceiver 1010 is further configured to receive an attach request message from the UE.
  • the processor 1020 is further configured to acquire the identifier information according to the attach request message.
  • the transceiver 1010 is further configured to send an attach accept message to the UE, where the attach accept message includes the identifier information.
  • the core network control plane device is a third core network control plane device, and the service area of the third core network control plane device includes a first service area where the UE is currently located.
  • the transceiver 1010 is further configured to send a context request message to the second core network control plane device according to the location update request message, where the service area of the second core network control plane device includes the location where the UE sends the location update request message a second service area; receiving, by the second core network control plane device, a context of the UE, where the context of the UE includes the identifier information.
  • processor 1020 is specifically configured to:
  • the user subscription information is obtained from the user data manager, and the user subscription information includes the identifier information.
  • processor 1020 is specifically configured to:
  • the core network control plane device 1000 may correspond to the target core network control plane device described in the above method.
  • the processor 1020 calls and runs the computer program from the memory, the processor 1020 can be used to perform the method of the embodiment shown in FIG. 2 to FIG. 6, and implement the target core network control plane device as shown in FIGS. 2-6. The function of the embodiment.
  • the transceiver 1010 is configured to receive an attach request message from the user equipment UE.
  • the processor 1020 is configured to obtain, according to the attach request message, identifier information, where the identifier information is used to identify a tenant or a user group to which the UE belongs;
  • the transceiver 1010 is further configured to send an attach accept message to the UE.
  • the attach accept message includes the identification information.
  • the transceiver 1010 the transceiver 1010
  • the core network control plane device 1000 may also correspond to the second core network control plane device described in the foregoing method.
  • the processor 1020 calls and runs the computer program from the memory, the processor 1020 can be used to perform the method of the embodiment shown in FIG. 2 to FIG. 6, and implement the second core network control plane device in FIGS. 2-6. The function of the embodiment is shown.
  • the embodiments of the present application may be applied to a processor or implemented by a processor.
  • the processor can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the processor may be a central processing unit (CPU), the processor may be another general-purpose processor, a digital signal processor (DSP), or an application specific integrated circuit (ASIC). ), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software in the decoding processor.
  • the software can be located in a random storage medium, such as a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.
  • the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read only memory (ROMM), an erasable programmable read only memory (erasable PROM, EPROM), or an electrical Erase programmable EPROM (EEPROM) or flash memory.
  • the volatile memory can be a random access memory (RAM) that acts as an external cache.
  • RAM random access memory
  • RAM random access memory
  • many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM).
  • SDRAM double data rate synchronous DRAM
  • DDR SDRAM double data rate synchronous DRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronously connected dynamic random access memory
  • DRRAM direct memory bus random access memory
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • 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 may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • 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 code. .

Abstract

本申请实施例提供了一种当UE从第二服务区域移动到第一服务区域时，该UE向目标核心网络控制面设备发送位置更新请求消息；该UE从该目标核心网络控制面设备接收位置更新请求拒绝消息，该位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式去附着指示；该UE根据该隐式去附着指示向该第一核心网络控制面设备发送附着请求消息，以触发该UE的重新附着流程，其中该附着请求消息包括该第一网络切片选择辅助信息。根据本申请实施例的通信方法，能够使得核心网络为用户设备提供较优的服务。

Description

通信方法、用户设备和核心网络控制面设备 技术领域
本申请涉及通信领域，并且更具体地，涉及一种通信方法、用户设备(user equipment，UE)和核心网络控制面设备。
背景技术
网络切片是一种新式网络和业务模式，可通过定制网络和管理，从而满足更好地满足消费者和企业每个服务的个性化需求。网络切片技术是将一个物理网络分成多个网络切片实例，每个网络切片实例按照业务场景的需要进行网络功能的定制裁剪及相应网络功能的编排管理。通过定制网络和管理，更好地满足消费者和企业每个服务的个性化需求，实现多种业务共享一套宽带网络基础设施的同时保持业务实现的相对独立。其中，个性化需求包括覆盖区域、持续时间、容量、速度、延迟、可靠性、安全性以及可用性等。每一个网络切片实例可以视为一个核心网络架构，网络切片实例可应用于移动宽带、多媒体、大规模机器类通信(massive machine type communication)和关键机器类通信(critical machine type communication)等。
对于采用网络切片技术的核心网架构，UE可以接入单个切片或多个切片，并且UE可以同时使用多个切片提供的不同的服务。对于企业用户或者其他特定用户，通常会采用基于租户的方法来提供服务。面向租户的多切片架构中，核心网络为特定租户选择专用的租户共享控制网络功能(tenant common control network function，Tenant CCNF)设备和相应的专用切片实例(dedicated slice instances)，来为租户内的UE提供服务。一般情况下，租户共享控制网络功能设备的覆盖区域(或称为服务区域)有限，当UE位于租户专用的共享控制网络功能设备的覆盖区域内时，优先由租户专用的共享控制网络功能设备为UE提供服务；而当UE位于租户专用的共享控制网络功能设备的覆盖区域外时，则由运营商提供的广覆盖运营商共享控制网络功能(operator common control network function，Operator CCNF)设备为UE提供相应的服务。
但是，目前的问题在于，当UE初始连接到运营商共享控制网络功能设备，而后移动到租户共享控制网络功能设备的覆盖区域时，仍会由运营商共享控制网络功能设备提供服务，而不能切换到租户共享控制网络功能设备，以使用租户共享控制网络功能设备提供的较优的服务。
发明内容
本申请实施例提供一种通信方法、用户设备和核心网络控制面设备，能够使得核心网络为用户设备提供较优的服务。
第一方面，提供了一种通信方法，包括：当用户设备UE从第二服务区域移动到第一服务区域时，该UE向目标核心网络控制面设备发送位置更新请求消息，该目标核心网络控制面设备的服务区域包括该第一服务区域；
该UE从该目标核心网络控制面设备接收位置更新请求拒绝消息，该位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式去附着指示，该第一网络切片选择辅助信息包括标识信息，该第一网络切片选择辅助信息用于选择能够为该标识信息所标识的 该UE所属的租户或用户群组提供专用服务的第一核心网络控制面设备；
该UE根据该隐式去附着指示向该第一核心网络控制面设备发送附着请求消息，以触发该UE的重新附着流程，其中该附着请求消息包括该第一网络切片选择辅助信息。
根据本申请实施例的通信方法，当UE移动到第一核心网络控制面设备(例如，租户CCNF设备)和目标核心网络控制面设备(例如，运营商CCNF设备)共有的服务区域时，目标核心网络控制面设备通过拒绝UE的附着请求，强制使UE向第一核心网络控制面设备发起重新附着流程。UE根据目标核心网络控制面设备的指示，向核心网络发起重新附着流程，附着到第一核心网络控制面设备，从而能够使用第一核心网络控制面设备提供的较优的(或者专用的)服务。
在一种可能的实现方式中，该目标核心网络控制面设备为第二核心网络控制面设备，该第二核心网络控制面设备的服务区域还包括该第二服务区域，
在该UE从该目标核心网络控制面设备接收位置更新请求拒绝消息之前，该方法还包括：
该UE向该第二核心网络控制面设备发送附着请求消息；
该UE从该第二核心网络控制面设备接收附着接受消息，该附着接受消息包括该标识信息。
在一种可能的实现方式中，该目标核心网络控制面设备为第三核心网络控制面设备，该第三核心网络控制面设备的服务区域不包括该第二服务区域，
在该UE从该目标核心网络控制面设备接收位置更新请求拒绝消息之前，该方法还包括：
该UE向服务区域包括该第二服务区域的第二核心网络控制面设备发送附着请求消息；
该UE从该第二核心网络控制面设备接收附着接受消息，该附着接受消息包括该标识信息。
在一种可能的实现方式中，该位置更新请求消息包括该标识信息。
第二方面，提供了一种通信方法，包括：目标核心网络控制面设备从用户设备UE接收位置更新请求消息；
该目标核心网络控制面设备根据该位置更新请求消息获取标识信息和服务区域信息，其中，该服务区域信息用于指示第一核心网络控制面设备的服务区域，该第一核心网络控制面设备为能够为该标识信息所标识的该UE所属的租户或用户群组提供专用服务的核心网络控制面设备；
该目标核心网络控制面设备根据该标识信息和该服务区域信息，确定该UE位于该第一核心网络控制面设备的服务区域内；
该目标核心网络控制面设备向该UE发送位置更新请求拒绝消息，该位置更新请求拒绝消息包括携带该标识信息的第一网络切片选择辅助信息和隐式去附着指示，该隐式去附着指示用于指示该UE发起重新附着流程，该第一网络切片选择辅助信息用于选择该第一核心网络控制面设备。
根据本申请实施例的通信方法，当UE移动到第一核心网络控制面设备(例如，租户CCNF设备)的服务区域时，目标核心网络控制面设备(例如，运营商CCNF设备)根据标识该UE所属的租户或用户群组的标识信息和第一核心网络控制面设备的服务区 域信息，能够确定该UE位于该第一核心网络控制面设备的服务区域内，从而拒绝UE的附着请求，并指示UE向第一核心网络控制面设备发起重新附着流程。UE根据目标核心网络控制面设备的指示，向核心网络发起重新附着流程，附着到第一核心网络控制面设备，从而能够使用第一核心网络控制面设备提供的较优的服务。
在一种可能的实现方式中，该位置更新请求消息包括该标识信息。
在一种可能的实现方式中，该目标核心网络控制面设备为第三核心网络控制面设备，该第三核心网络控制面设备的服务区域包括该UE当前所在的第一服务区域，
该目标核心网络控制面设备根据该位置更新请求消息获取该标识信息，包括：
该第三核心网络控制面设备根据该位置更新请求消息向第二核心网络控制面设备发送上下文请求消息，该第二核心网络控制面设备的服务区域包括该UE发送该位置更新请求消息之前所在的第二服务区域；
该第三核心网络控制面设备从该第二核心网络控制面设备接收该UE的上下文，该UE的上下文包括该标识信息。
在一种可能的实现方式中，该目标核心网络控制面设备为第二核心网络控制面设备，该第二核心网络控制面设备的服务区域包括该UE发送该位置更新请求消息之前该的第二服务区域，且该第二核心网络控制面设备的服务区域不包括该UE当前所在的第一服务区域，
在该目标核心网络控制面设备从用户设备UE接收位置更新请求消息之前，该方法还包括：
该第二核心网络控制面设备从该UE接收附着请求消息；
该第二核心网络控制面设备根据该附着请求消息，获取该标识信息；
该第二核心网络控制面设备向该UE发送附着接受消息，该附着接受消息包括该标识信息。
在一种可能的实现方式中，该第二核心网络控制面设备根据该附着请求消息，获取该标识信息，包括：
该第二核心网络控制面设备根据该附着请求消息，从用户数据管理器中获取用户签约信息，该用户签约信息中包括该标识信息。
在一种可能的实现方式中，该目标核心网络控制面设备根据该位置更新请求消息获取该服务区域信息，包括：
该目标核心网络控制面设备根据该位置更新请求消息，从网络切片选择功能NSSF设备获取该服务区域信息，或
该目标核心网络控制面设备根据该位置更新请求消息，从该目标核心网络控制面设备预配置的信息中获取该服务区域信息。
第三方面，提供一种通信方法，包括：第二核心网络控制面设备从用户设备UE接收附着请求消息；
该第二核心网络控制面设备根据该附着请求消息获取标识信息，该标识信息用于标识该UE所属的租户或用户群组；
该第二核心网络控制面设备向该UE发送附着接受消息。
在一种可能的实现方式中，该附着接受消息包括该标识信息。
在一种可能的实现方式中，该方法还包括：
该第二核心网络控制面设备从第三核心网络控制面设备接收上下文请求消息；
该第二核心网络控制面设备根据该上下文请求消息向该第三核心网络控制面设备发送该UE的上下文，该UE的上下文包括该标识信息。
第四方面，提供了一种用户设备，用于执行第一方面或第一方面的任意可能的实现方式中的方法。具体地，该用户设备包括用于执行第一方面或第一方面的任意可能的实现方式中的方法的单元。
第五方面，提供了一种核心网络控制面设备，用于执行第二方面或第二方面的任意可能的实现方式中的方法。具体地，该核心网络控制面设备包括用于执行第二方面或第二方面的任意可能的实现方式中的方法的单元。
第六方面，提供了一种核心网络控制面设备，用于执行第三方面或第三方面的任意可能的实现方式中的方法。具体地，该核心网络控制面设备包括用于执行第三方面或第三方面的任意可能的实现方式中的方法的单元。
第七方面，提供了一种用户设备，该用户设备包括存储器和处理器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该网络设备执行上述第一方面及第一方面的任意可能的实现方式中的方法。
第八方面，提供了一种核心网络控制面设备，该核心网络控制面设备包括存储器和处理器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该用户设备执行上述第二方面及第二方面的任意可能的实现方式中的方法。
第九方面，提供了一种核心网络控制面设备，该核心网络控制面设备包括存储器和处理器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该用户设备执行上述第三方面及第三方面的任意可能的实现方式中的方法。
第十方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序包括用于执行第一方面、第二方面和第三方面及第一方面、第二方面和第三方面的任意可能的实现方式中的方法的指令。
第十一方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第一方面、第二方面和第三方面及第一方面、第二方面和第三方面的任意可能的实现方式中的方法。
附图说明
图1示出了根据本申请实施例的一个面向租户的多切片架构示意图。
图2示出了根据本申请实施例的通信方法的示意性流程图。
图3示出了根据本申请一个具体实施例的通信方法的示意性流程图。
图4示出了根据本申请一个具体实施例的通信方法的示意性流程图。
图5示出了根据本申请另一具体实施例的通信方法的示意性流程图。
图6示出了根据本申请又一具体实施例的通信方法的示意性流程图。
图7是示出了根据本申请实施例的用户设备的示意性框图。
图8是示出了根据本申请实施例的核心网络控制面设备的示意性框图。
图9是示出了根据本申请实施例的用户设备的另一示意性框图。
图10是示出了根据本申请实施例的核心网络控制面设备的另一示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
本申请的技术方案，可以应用于各种通信系统，例如：全球移动通讯系统(global system of mobile communication，GSM)，码分多址(code division multiple access，CDMA)系统，宽带码分多址(wideband code division multiple access wireless，WCDMA)，通用分组无线业务(General Packet Radio Service，GPRS)，长期演进(long term evolution，LTE)等。
用户设备也可称之为移动终端(Mobile Terminal)、移动用户设备等，可以经无线接入网(例如，radio access network，RAN)与一个或多个核心网络进行通信，用户设备可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。
图1示出了一个面向租户的多切片架构示意图。图1所示的架构中涉及的网元功能如下：
RAN节点102：是移动通信系统中的一部分，建立与UE的无线连接，实现UE和核心网络(例如，核心网络控制面设备)之间的互通。
网络切片选择功能(network slice selection function，NSSF)设备103：依据UE所属的租户或用户群组的标识信息为UE选择对应的CCNF(common core network function)设备(例如，运营商CCNF设备或租户CCNF设备)；而且NSSF设备具有所有CCNF设备的部署位置信息，可以判断UE是否进入了租户CCNF设备的服务区域。
租户CCNF设备107：为特定租户或用户群组提供服务的租户核心网络共享控制面，包含了属于租户或用户群组的UE所需连接的一个或多个切片的共享核心网络控制面功能，且至少包括接入和移动性管理功能AMF(access and mobility management function)。需要说明的是，本申请所述的CCNF设备，都可以用AMF设备来代替。
运营商CCNF设备106：运营商提供的共享核心网络控制面，为不属于特定租户或用户群组的UE、以及属于特定租户或用户群组但不在租户CCNF设备覆盖区域的的UE提供相应的服务。
核心网络切片实例(核心网络切片实例#1～核心网络切片实例#3)：按切片需求方的需求灵活地提供一种或多种网络服务，包含了切片内的专有共享控制面网络功能设备和用户面网络功能设备。本领域技术人员可以理解的是，核心网络切片实例与可以简称为切片。
应理解，在一些场景中，NSSF设备的功能可以集成在CCNF设备中。在此情况下，集成NSSF设备的功能的CCNF设备具备其他CCNF设备的部署位置信息，可以判断UE是否进入了租户CCNF设备的服务区域。并且，可以根据租户或用户群组标识等相关信息为UE选择对应的租户CCNF设备。
如图1所示的多切片架构，一般情况下，租户CCNF设备107的覆盖区域(或称为服务区域)有限，当UE位于租户CCNF设备107的覆盖区域内时，UE优先经由RAN节点102与租户CCNF设备107互通，由核心网络切片实例#2和核心网络切片实例#3为UE提供业务/切片类型为#A和业务/切片类型为#B的服务。而当UE位于租户CCNF设 备107的覆盖区域外时，则UE经由RAN节点102与运营商CCNF设备106互通，由核心网络切片实例#1为UE提供业务/切片类型为#A的服务。
但是，目前的问题在于，当UE101初始连接到运营商CCNF设备106，而后移动到租户CCNF设备107的覆盖区域时，仍会由运营商CCNF设备106为其提供服务，而无法切换到租户CCNF设备107，由租户CCNF设备107为其提供较优的服务。
为此，本申请提供了一种通信方法，使得当UE由运营商CCNF设备提供服务的区域移动到租户CCNF设备的服务区域时，UE可以切换到租户CCNF设备，使用租户CCNF设备提供的较优的服务。
应理解，下文中所描述的第一核心网络控制面设备可以是租户CCNF设备，第二核心网络控制面设备和第三核心网络控制面设备可以是运营商CCNF设备。此时，本申请方案可以为属于特定租户或用户群组的UE选择合适的CCNF设备，当这类UE不位于租户CCNF设备的覆盖区域时，由运营商设备CCNF为其提供服务，当这类UE位于租户CCNF设备的覆盖区域时，如果没有其它限制条件，由租户CCNF设备为其提供服务。下文所述UE都是指属于特定租户或用户群组的UE。
还应理解，租户CCNF设备只是第一核心网络控制面设备的一个例子，运营商设备CCNF只是第二核心网络控制面板和第三核心网络控制面板设备的例子，本申请同样适用于其它的满足上述条件的CCNF设备。
图2是根据本申请实施例的通信方法的示意性流程图。
S210，UE位于第二服务区域时，向核心网络发送第一附着请求消息(即，附着请求消息的一例)。
例如，第二服务区域属于第二核心网络控制面设备的服务区域，或者称，第二服务区域属于第二核心网络控制面设备提供服务的区域。UE发送的第一附着请求消息，经第一RAN节点转发到第二核心网络控制面设备。
可选地，第一附着请求消息可以携带第二网络切片选择辅助信息。该第二网络切片选择辅助信息可以包括一个或一组切片(或称为业务)类型(Service/Slice Type)信息，该第二网络切片选择辅助信息可以指示该UE所期望核心网络设备为该UE提供的一个或一组切片类型。该一个或一组切片类型可以是增强移动宽带(enhanced mobile broadband，eMBB)切片，或低时延高可靠性(ultra-low latency and reliable communications，ULLRC)切片，或大规模物联网(massive IoT，mIoT)切片等。第一RAN节点可以根据该第二网络切片选择辅助信息，将第一附着请求消息转发至第二核心网络控制面设备。
S220，第二核心网络控制面设备根据该第一附着请求消息获取标识信息。
该标识信息用于标识UE所属的租户或用户群组。可选地，该UE可以通过查询用户数据管理器(User Data Management)获取用户签约信息。其中，用户签约信息中包括该标识信息。
S230，第二核心网络控制面设备接受UE的附着请求时，向UE发送附着接受消息。
之后，UE经由第一RAN节点与第二核心网络控制面设备进行附着流程的后续的信令交互。
可选地，附着接受消息可以包括第三网络切片选择辅助信息以及S220中获取的标识信息。该第三网络切片选择辅助信息用于指示第二核心网络控制面设备根据UE的签约信息确定的核心网络授权给UE可以使用的一个或一组切片类型。核心网络授权给UE可 以使用的一个或一组切片类型可以是UE请求的一个或一组切片类型中的部分或全部。
S240，当UE从第二服务区域移动到第一服务区域时，UE向目标核心网络控制面设备发送位置更新请求消息。其中，目标核心网络控制面设备的服务区域包括第一服务区域。
这里分为两种情况：
情况一
UE的移动发生在第二核心网络控制面设备的服务区域内。
也就是说，第二核心网络控制面设备的服务区域还包括第二服务区域。此时，目标核心网络控制面设备为第二核心网络控制面设备，UE发送的位置更新请求消息由第一RAN节点接收，第一RAN节点例如可以根据第二网络切片选择辅助信息，将该位置更新请求消息转发到第二核心网络控制面设备。
情况二
UE的移动发生在两个核心网络控制面设备的服务区域之间，UE从第二核心网络控制面设备的服务区域移动到第三核心网络控制面设备的服务区域内。
也就是说，第三核心网络控制面设备的服务区域包括第一服务区域，但不包括第二服务区域。此时，目标核心网络控制面设备为第三核心网络控制面设备，UE发送的位置更新请求消息由第二RAN节点接收，第二RAN节点例如可以根据第二网络切片选择辅助信息，将该位置更新请求消息转发到第三核心网络控制面设备。
可选地，该位置更新请求消息可以包括标识信息，该标识信息用于标识该UE所属的租户或用户群组。
在本申请实施例中，第一服务区域同时位于第三核心网络控制面设备的服务区域和第一核心网络控制面设备能够提供服务的区域中。应理解，当该UE位于第一服务区域，并且附着到第一核心网络控制面设备时，第一核心网络控制面设备能够为该UE所属的租户或用户群组提供专用服务。
一般地，第一核心网络控制面设备的服务区域小于第二核心网络控制面设备或第三核心网络控制面设备的服务区域，但本申请实施例对此不作特殊限定。
S250，该目标核心网络控制面设备根据该位置更新请求消息获取标识信息和服务区域信息。
可选地，位置更新请求消息可以携带该标识信息，目标核心网络控制面设备可以通过位置更新请求消息获得该标识信息。
可选地，目标核心网络控制面设备也可以通过UE的上下文获取该标识信息。应理解，该方式主要针对S240中所描述的情况二。
例如，第三核心网络控制面设备在接收到UE发送的位置更新请求消息后，可以向第二核心网络控制面设备发送上下文请求消息，请求该标识信息。然后，第二核心网络控制面设备根据该上下文请求消息，向第三核心网络控制面设备发送包括该标识信息的UE上下文，第三核心网络控制面设备在获得该UE上下文后，可以获取该标识信息。
本申请实施例中，该位置更新请求消息可以包括上述第三网络切片选择辅助信息。
服务区域信息可用于指示第一核心网络控制面设备的服务区域。
本申请实施例中，网络切片选择功能NSSF设备和核心网络控制面设备可以分开部署。也就是说，可以在系统中单独部署具有NSSF的NSSF设备和核心网络控制面设备。
对于此种情况，目标核心网络控制面设备可以从NSSF设备中获取该服务区域信息。
例如，NSSF设备存储有多个UE所属的租户的标识信息、能够为各个UE所属的租户提供专用服务的核心网络控制面设备、核心网络控制面设备的服务区域信息这三者之间的对应关系。NSSF设备能够根据目标核心网络控制面设备或者UE提供的标识信息以及上述对应关系，获得第一核心网络控制面设备的服务区域信息。然后，NSSF设备可以将该服务区域信息发送给目标核心网络控制面设备。
此外，本申请实施例中，也可以将NSSF部署在核心网络控制面设备(例如，第二核心网络控制面设备或第三核心网络控制面设备)上。
在此情况下，核心网络控制面设备自身存储有多个UE所属的租户的标识信息、能够为各个UE所属的租户提供专用服务的核心网络控制面设备、和核心网络控制面设备的服务区域信息这三者之间的对应关系。目标核心网络控制面设备，例如第二核心网络控制面设备或第三核心网络控制面设备，能够根据该标识信息和所述对应关系，获得所述第一核心网络控制面设备的服务区域信息。
S260，该目标核心网络控制面设备根据该标识信息和该服务区域信息，确定该UE位于该第一核心网络控制面设备的服务区域内。
例如，当前UE位于第一服务区域内，而第一服务区域又属于第一核心网络控制面设备的服务区域。因此，目标核心网络控制面设备根据该服务区域信息，即第一核心网络控制面设备的服务区域信息，能够确定UE位于该第一核心网络控制面设备的服务区域内。
S270，该目标核心网络控制面设备向该UE发送位置更新请求拒绝消息。
例如，该位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式分离标识。该第一网络切片选择辅助信息包括所述用于标识UE所属的租户或用户群组的标识信息。
此外，第一网络切片选择辅助信息还可以包括该UE所属的租户或用户群组的一个或一组切片类型信息，该一个或一组切片类型信息可以和第二网络切片选择辅助信息中的一个或一组切片类型信息相同。
应理解，第一网络切片选择辅助信息携带的信息可以与第二网络切片选择辅助信息携带的信息相同，也可以不同，本申请实施例对比不作具体限定。
S280，UE向核心网络发送第二附着请求消息(即，附着请求消息的另一例)。
例如，UE在接收到目标核心网络控制面设备发送的位置更新请求拒绝消息后，根据该位置更新请求拒绝消息携带的隐式分离标识，触发重新附着流程。此时，UE发送第二附着请求消息。第二附着请求消息包括所述第一网络切片选择辅助信息。第二RAN节点在接收到第二附着请求消息后，根据第一网络切片选择辅助信息中的标识信息，选择第一核心网络控制面设备。将该第二附着请求消息转发至第一核心网络控制面设备。
之后，UE与第一核心网络控制面设备进行附着流程的后续的信令交互，附着到第一核心网络控制面设备，使用第一核心网络控制面设备提供的较优的服务。
根据本申请实施例的通信方法，当UE移动到第一核心网络控制面设备(例如，租户CCNF设备)的服务区域时，目标核心网络控制面设备(例如，运营商CCNF设备)根据标识该UE所属的租户或用户群组的标识信息和第一核心网络控制面设备的服务区域信息，能够确定该UE位于该第一核心网络控制面设备的服务区域内，从而拒绝UE的附着请求，并指示UE向第一核心网络控制面设备发起重新附着流程。UE根据目标核心 网络控制面设备的指示，向核心网络发起重新附着流程，附着到第一核心网络控制面设备，从而能够使用第一核心网络控制面设备提供的较优的服务。
需要说明的是，上文中的第一RAN节点与第二RAN节点可能是同一节点。如果UE当前接入的RAN节点，只能与第二核心网络控制面设备和第三核心网络控制面设备之一建立连接，那么，第一RAN节点与第二RAN节点为不同的两个节点。如果UE当前接入的RAN节点，既能与第二核心网络控制面设备建立连接，又能与第三核心网络控制面设备建立连接，那么第二RAN节点和第一RAN节点为同一节点。
下面，将结合图3至图6，详细描述根据本申请实施例的通信方法。
应理解，下文中所涉及的与前文相同的词语或术语等均可以参照上文中的描述，为避免赘述，下文中将不作详细介绍。
图3至图6所示的方法中，将不再详细区分第一RAN节点和第二RAN节点，而统一描述为RAN节点。本领域技术人员可以理解的是，下文中所描述的RAN节点相应地对应第一RAN节点或第二RAN节点。
图3和图4所示的方法中，第二核心网络控制面设备和第三核心网络控制面设备均集成了NSSF或者说均集成了NSSF设备的功能。目标核心网络控制面设备(第二核心网络控制面设备或第三核心网络控制面设备)可以根据标识信息，确定UE进入了第一核心网络控制面设备的服务区域。
图3是根据本申请一个具体实施例的通信方法的示意性流程图。
S301，UE位于第二核心网络控制面设备的服务区域，即第二服务区域时，向核心网络发送第一附着请求消息(即，附着请求消息的一例)。
例如，UE发送第一附着请求消息，经RAN节点转发到第二核心网络控制面设备。
可选地，第一附着请求消息可以携带第二网络切片选择辅助信息。该第二网络切片选择辅助信息具体参考参照上文描述，RAN节点可以根据该第二网络切片选择辅助信息将第一附着请求消息转发至第二核心网络控制面设备。
S303，第二核心网络控制面设备根据该第一附着请求消息从用户数据管理器获取用户签约信息。其中，用户签约信息中包括用于标识UE所属的租户或用户群组的标识信息。
例如，第二核心网络控制面设备可以根据该第一附着请求消息，向用户数据管理器发送标识信息请求消息。该标识信息请求消息用于请求该标识信息。用户数据管理器根据该标识信息请求消息，向第二核心网络控制面设备发送包括该标识信息的用户签约信息。
S305，第二核心网络控制面设备向UE发送附着接受消息。
附着接受消息可以包括所述标识信息和第三网络切片选择辅助信息。第三网络切片选择辅助信息可以参照上文描述，为了简洁此处不作赘述。
之后，UE经由RAN节点与第二核心网络控制面设备进行附着流程的后续的信令交互。具体可以参照现有技术，本申请实施例对此不作详细介绍。
S307，当UE从第二服务区域移动到第三核心网络控制面设备的第一服务区域时，UE向核心网络发送位置更新请求消息。
例如，UE发送位置更新请求消息，经RAN节点转发到第三核心网络控制面。其中，该位置更新请求消息可以包括上述第三网络切片选择辅助信息。
S309，第三核心网络控制面设备根据该位置更新请求消息中的标识信息以及该第一核心网络控制面设备的服务区域信息，可以确定该UE位于该第一核心网络控制面设备的服务区域。
S311，第三核心网络控制面设备向该UE发送位置更新请求拒绝消息。该位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式分离标识。
例如，该第一网络切片选择辅助信息包括所述用于标识UE所属的租户或用户群组的标识信息。此外，第一网络切片选择辅助信息还包括一个或一组切片类型，具体可以参照上文描述，为了简洁，此处不再赘述。
S312，UE向核心网络发送第二附着请求消息(即，附着请求消息的另一例)。
例如，UE在接收到第三核心网络控制面设备发送的位置更新请求拒绝消息后，根据该位置更新请求拒绝消息携带的隐式分离标识，发送第二附着请求消息。第二附着请求消息包括所述第一网络切片选择辅助信息。RAN节点在接收到第二附着请求消息后，根据第一网络切片选择辅助信息，将该第二附着请求消息转发至第一核心网络控制面设备。
之后，UE与第一核心网络控制面设备进行附着流程的后续的信令交互，附着到第一核心网络控制面设备，以使用第一核心网络控制面设备提供的较优的服务。
应理解，如果在S307中，UE是从第二核心网络控制面设备的第二服务区域移动到第二核心网络控制面设备的第一服务区域，那么，UE将向第二核心网络控制面设备发送位置更新请求消息。这时，在S307～S311中，与第三核心网络控制面设备相关的操作将由第二核心网络控制面设备执行，具体可以参照S307～S311与第三核心网络控制面设备相关的描述，为了简洁，此处不再详细描述。
根据本申请实施例的通信方法，当UE移动到第一核心网络控制面设备(例如，租户CCNF设备)的服务区域时，第三核心网络控制面设备(例如，运营商CCNF设备)根据标识该UE所属的租户或用户群组的标识信息和第一核心网络控制面设备的服务区域信息，能够确定该UE位于该第一核心网络控制面设备的服务区域内，从而拒绝UE的附着请求，并指示UE向核心网络发起重新附着流程。UE根据第三核心网络控制面设备的指示，向核心网络发起重新附着流程，附着到第一核心网络控制面设备，从而能够使用第一核心网络控制面设备提供的较优的服务。
图4是根据本申请一个具体实施例的通信方法的示意性流程图。
S401，UE位于第二核心网络控制面设备的服务区域，即第二服务区域时，向核心网络发送第一附着请求消息(即，附着请求消息的一例)。
例如，UE发送第一附着请求消息，经RAN节点转发到第二核心网络控制面设备。
可选地，第一附着请求消息可以携带第二网络切片选择辅助信息。该第二网络切片选择辅助信息具体参考参照上文描述，RAN节点可以根据该第二网络切片选择辅助信息将第一附着请求消息转发至第二核心网络控制面设备。
S403，第二核心网络控制面设备根据该第一附着请求消息从用户数据管理器获取用户签约信息。其中，用户签约信息中包括该标识信息。
例如，第二核心网络控制面设备可以根据该第一附着请求消息，向用户数据管理器发送标识信息请求消息。该标识信息请求消息用于请求该标识信息。用户数据管理器根据该标识信息请求消息，向第二核心网络控制面设备发送包括该标识信息的用户签约信息。
S405，第二核心网络控制面设备向UE发送附着接受消息。
附着接受消息包括所述标识信息和第三网络切片选择辅助信息。所述第三网络切片选择辅助信息是第二核心网络控制面设备根据UE的签约信息确定的核心网络授权给UE可以使用的一个或一组切片类型，可以与第二网络切片选择辅助信息携带的信息相同，也可以不同。
之后，UE经由RAN节点与第二核心网络控制面设备进行附着流程的后续的信令交互。具体可以参照现有技术，本申请实施例对此不作详细介绍。
S407，当UE从第二服务区域移动到第三核心网络控制面设备的第一服务区域时，UE向核心网络发送位置更新请求消息。
例如，UE发送位置更新请求消息，经RAN节点转发到第三核心网络控制面。其中，该位置更新请求消息可以包括上述第三网络切片选择辅助信息。
S409，第三核心网络控制面设备向第二核心网络控制面设备发送上下文请求消息。
S411，第二核心网络控制面设备在接收到该上下文请求消息后，向第三核心网络控制面设备发送UE上下文。所述UE上下文包括用于标识UE所属的租户或用户群组的标识信息。
S413，第三核心网络控制面设备根据该位置更新请求消息中的标识信息以及该第一核心网络控制面设备的服务区域信息，可以确定该UE位于该第一核心网络控制面设备的服务区域。
S415，第三核心网络控制面设备向该UE发送位置更新请求拒绝消息。该位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式分离标识。
例如，该第一网络切片选择辅助信息包括所述用于标识UE所属的租户或用户群组的标识信息。此外，第一网络切片选择辅助信息还可以包括一个或一组切片类型，具体可以参照上文描述。
S417，UE向核心网络发送第二附着请求消息(即，附着请求消息的另一例)。
例如，UE在接收到第三核心网络控制面设备发送的位置更新请求拒绝消息后，根据该位置更新请求拒绝消息携带的隐式分离标识，发送第二附着请求消息。第二附着请求消息包括所述第一网络切片选择辅助信息。RAN节点在接收到第二附着请求消息后，根据第一网络切片选择辅助信息中的标识信息，将该第二附着请求消息转发至第一核心网络控制面设备。
之后，UE与第一核心网络控制面设备进行附着流程的后续的信令交互，附着到第一核心网络控制面设备，以使用第一核心网络控制面设备提供的较优的服务。
根据本申请实施例的通信方法，当UE移动到第一核心网络控制面设备(例如，租户CCNF设备)的服务区域时，第三核心网络控制面设备(例如，运营商CCNF设备)根据从第二核心网络控制面设备获取的标识该UE所属的租户或用户群组的标识信息以及第一核心网络控制面设备的服务区域信息，能够确定该UE位于该第一核心网络控制面设备的服务区域内，从而拒绝UE的附着请求，并指示UE向核心网络发起重新附着流程。UE根据第三核心网络控制面设备的指示，向核心网络发起重新附着流程，附着到第一核心网络控制面设备，从而能够使用第一核心网络控制面设备提供的较优的服务。
下文将要介绍的图5和图6所示的方法中，NSSF设备、第二核心网络控制面设备和第三核心网络控制面设备分别作为独立的设备来部署。
图5是根据本申请一个具体实施例的通信方法的示意性流程图。
S501，UE位于第二核心网络控制面设备的服务区域，即第二服务区域时，向核心网络设备发送第一附着请求消息(即，附着请求消息的一例)。
例如，UE发送第一附着请求消息，经RAN节点转发第二核心网络控制面设备。
可选地，第一附着请求消息可以携带第二网络切片选择辅助信息。该第二网络切片选择辅助信息具体参考参照上文描述。RAN节点根据该第二网络切片选择辅助信息，将第一附着请求消息转发至第二核心网络控制面设备。
在本申请实施例中，如果RAN节点根据该第二网络切片选择辅助信息无法为UE确定合适的核心网络控制面设备(即CCNF设备或AMF设备)，RAN节点可以将第一附着请求消息转发至NSSF设备，NSSF为UE选择第二核心网络控制面设备，并将第一附着请求消息转发至第二核心网络控制面设备，或指示RAN节点将第一附着请求消息转发至第二核心网络控制面设备。
S503，第二核心网络控制面设备根据该第一附着请求消息从用户数据管理器获取用户签约信息。其中，用户签约信息中包括该标识信息。
例如，第二核心网络控制面设备可以根据该第一附着请求消息，向用户数据管理器发送标识信息请求消息。该标识信息请求消息用于请求该标识信息。用户数据管理器根据该标识信息请求消息，向第二核心网络控制面设备发送包括该标识信息的用户签约信息。
S505，第二核心网络控制面设备向UE发送附着接受消息。
附着接受消息包括所述标识信息和第三网络切片选择辅助信息。第三网络切片选择辅助信息具体可以参照上文描述，为了简洁此处不作赘述。
之后，UE经由RAN节点与第二核心网络控制面设备进行附着流程的后续的信令交互。具体可以参照现有技术，本申请实施例对此不作详细介绍。
S507，当UE从第二服务区域移动到第三核心网络控制面设备的第一服务区域时，UE向核心网络发送位置更新请求消息。其中，该位置更新请求消息可以包括上述第三网络切片选择辅助信息。
可选地，UE发送位置更新请求消息，经RAN节点转发到NSSF设备。NSSF设备根据位置更新请求中携带的的标识信息，确定与该标识信息对应的服务区域信息。然后，NSSF设备在该位置更新请求消息中附上该服务区域信息，并将包括该服务区域信息的位置更新请求消息发送至第三核心网络控制面设备。
可选地，NSSF设备可以直接转发UE发送的位置更新请求消息给第三核心网络控制面设备。然后，第三核心网络控制面设备根据该位置更新请求消息中的标识信息，再从NSSF设备中获取该服务区域信息。
S509，该第三核心网络控制面设备根据该位置更新请求消息中的标识信息以及该第一核心网络控制面设备的服务区域信息，可以确定该UE位于该第一核心网络控制面设备的服务区域。
S511，该第三核心网络控制面设备向该UE发送位置更新请求拒绝消息。该位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式分离标识。
例如，该第一网络切片选择辅助信息包括所述用于标识UE所属的租户或用户群组的标识信息。此外，第一网络切片选择辅助信息还可以包括一个或一组切片类型，具体 可以参照上文描述。
S513，UE向核心网络发送第二附着请求消息(即，附着请求消息的另一例)。
例如，UE在接收到第三核心网络控制面设备发送的位置更新请求拒绝消息后，根据该位置更新请求拒绝消息携带的隐式分离标识，发送第二附着请求消息。第二附着请求消息包括所述第一网络切片选择辅助信息。RAN节点根据第一网络切片选择辅助信息，将该第二附着请求消息转发至第一核心网络控制面设备。
之后，UE与第一核心网络控制面设备进行附着流程的后续的信令交互。这样，UE可以附着到第一核心网络控制面设备，以使用第一核心网络控制面设备提供的较优的服务。
应理解，如果在S507中，UE是从第二核心网络控制面设备的第二服务区域移动到第二核心网络控制面设备的第一服务区域，那么，UE将向核心网络发送位置更新请求消息。这时，在S507～S511中，与第三核心网络控制面设备相关的操作将由第二核心网络控制面设备执行，具体可以参照S509～S511与第三核心网络控制面设备相关的描述，为了简洁，此处不再详细描述。
根据本申请实施例的通信方法，当UE移动到第一核心网络控制面设备(例如，租户CCNF设备)的较优的服务区域时，第三核心网络控制面设备(例如，运营商CCNF设备)根据标识该UE所属的租户或用户群组的标识信息和第一核心网络控制面设备的服务区域信息，能够确定该UE位于该第一核心网络控制面设备的服务区域内，从而拒绝UE的附着请求，并指示UE向核心网络发起重新附着流程。UE根据第三核心网络控制面设备的指示，向核心网络发起重新附着流程，附着到第一核心网络控制面设备，从而能够使用第一核心网络控制面设备提供的较优的服务。
图6是根据本申请一个具体实施例的通信方法的示意性流程图。
S601，UE位于第二核心网络控制面设备的服务区域，即第二服务区域时，向核心网络发送第一附着请求消息(即，附着请求消息的一例)。
例如，UE发送第一附着请求消息，经RAN节点转发到第二核心网络控制面设备。
可选地，第一附着请求消息可以携带第二网络切片选择辅助信息。该第二网络切片选择辅助信息具体参考参照上文描述，RAN节点可以根据该第二网络切片选择辅助信息将第一附着请求消息转发至第二核心网络控制面设备。
在本申请实施例中，如果RAN节点根据该第二网络切片选择辅助信息无法为UE确定合适的核心网络控制面设备(即CCNF设备或AMF设备)，RAN节点可以将第一附着请求消息转发至NSSF设备，NSSF为UE选择第二核心网络控制面设备，并将第一附着请求消息转发至第二核心网络控制面设备，或指示RAN节点将第一附着请求消息转发至第二核心网络控制面设备。
S603，第二核心网络控制面设备根据该第一附着请求消息从用户数据管理器获取用户签约信息。其中，用户签约信息中包括该标识信息。
例如，第二核心网络控制面设备可以根据该第一附着请求消息，向用户数据管理器发送标识信息请求消息。该标识信息请求消息用于请求该标识信息。用户数据管理器根据该标识信息请求消息，向第二核心网络控制面设备发送包括该标识信息的用户签约信息。
S605，第二核心网络控制面设备向UE发送附着接受消息。
附着接受消息包括所述标识信息和第三网络切片选择辅助信息。所述第三网络切片选择辅助信息是第二核心网络控制面设备根据UE的签约信息确定的核心网络授权给UE可以使用的一个或一组切片类型，具体可以参照上文描述。第三网络切片选择辅助信息可以与第二网络切片选择辅助信息携带的信息相同，也可以不同。
之后，UE经由RAN节点与第二核心网络控制面设备进行附着流程的后续的信令交互。具体可以参照现有技术，本申请实施例对此不作详细介绍。
S607，当UE从第二服务区域移动到第三核心网络控制面设备的第一服务区域时，UE向核心网络发送位置更新请求消息。其中，该位置更新请求消息可以包括上述第三网络切片选择辅助信息。
可选地，UE发送位置更新请求消息，经RAN节点转发NSSF设备，再由NSSF设备转发到第三核心网络控制面。
S609，第三核心网络控制面设备向第二核心网络控制面设备发送上下文请求消息，请求用于标识UE所属的租户或用户群组的标识信息。
S611，第二核心网络控制面设备在接收到该上下文请求消息后，向第三核心网络控制面设备发送UE上下文。所述UE上下文包括用于标识UE所属的租户或用户群组的标识信息。
S612，第三核心网络控制面设备根据该标识信息，从NSSF设备中获取与该标识信息对应的服务区域信息，即第一核心网络控制面设备的服务区域信息。
S613，该第三核心网络控制面设备根据该位置更新请求消息中的标识信息以及该第一核心网络控制面设备的服务区域信息，可以确定该UE位于该第一核心网络控制面设备的服务区域。
S615，第三核心网络控制面设备向该UE发送位置更新请求拒绝消息。该位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式分离标识。
例如，该第一网络切片选择辅助信息包括所述用于标识UE所属的租户或用户群组的标识信息。此外，第一网络切片选择辅助信息还可以包括一个或一组切片类型，例如可以参照上文描述。
S617，UE向核心网络发送第二附着请求消息(即，附着请求消息的另一例)。
例如，UE在接收到第三核心网络控制面设备发送的位置更新请求拒绝消息后，根据该位置更新请求拒绝消息携带的隐式分离标识，发送第二附着请求消息。第二附着请求消息包括所述第一网络切片选择辅助信息。RAN节点在接收到第二附着请求消息后，根据第一网络切片选择辅助信息，将该第二附着请求消息转发至第一核心网络控制面设备。
之后，UE与第一核心网络控制面设备进行附着流程的后续的信令交互，附着到第一核心网络控制面设备，以使用第一核心网络控制面设备提供的较优的服务。
根据本申请实施例的通信方法，当UE移动到第一核心网络控制面设备(例如，租户CCNF设备)的服务区域时，第三核心网络控制面设备(例如，运营商CCNF设备)根据从第二核心网络控制面设备获取的标识该UE所属的租户或用户群组的标识信息以及第一核心网络控制面设备的服务区域信息，能够确定该UE位于该第一核心网络控制面设备的服务区域内，从而拒绝UE的附着请求，并指示UE向核心网络发起重新附着流程。UE根据第三核心网络控制面设备的指示，向核心网络发起重新附着流程，附着到第一核心网络控制面设备，从而能够使用第一核心网络控制面设备提供的较优的服务。
以上，结合图2至图6详细说明了根据本申请实施例的通信方法。以下，结合图7至图10详细说明根据本申请实施例的通信设备，其中该通信设备包括用户设备和核心网络控制面设备。
图7示出了本申请实施例的用户设备700的示意性框图。如图7所示，该用户设备700包括：发送单元710和接收单元720。
发送单元710，用于当用户设备UE从第二服务区域移动到第一服务区域时，向目标核心网络控制面设备发送位置更新请求消息，该目标核心网络控制面设备的服务区域包括该第一服务区域；
接收单元720，用于从该目标核心网络控制面设备接收位置更新请求拒绝消息，该位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式去附着指示，该第一网络切片选择辅助信息包括标识信息，该第一网络切片选择辅助信息用于选择能够为该标识信息所标识的该UE所属的租户或用户群组提供专用服务的第一核心网络控制面设备；
该发送单元710，还用于根据该隐式去附着指示向该第一核心网络控制面设备发送附着请求消息，以触发该UE的重新附着流程，其中该附着请求消息包括该第一网络切片选择辅助信息。
可选地，该目标核心网络控制面设备为第二核心网络控制面设备，该第二核心网络控制面设备的服务区域还包括该第二服务区域，
该发送单元710，还用于向该第二核心网络控制面设备发送附着请求消息；
该接收单元720，还用于从该第二核心网络控制面设备接收附着接受消息，该附着接受消息包括该标识信息。
可选地，该目标核心网络控制面设备为第三核心网络控制面设备，该第三核心网络控制面设备的服务区域不包括该第二服务区域，
该发送单元710，还用于向服务区域包括该第二服务区域的第二核心网络控制面设备发送附着请求消息；
该接收单元720，还用于从该第二核心网络控制面设备接收附着接受消息，该附着接受消息包括该标识信息。
可选地，该位置更新请求消息包括该标识信息。
应理解，该用户设备700可以对应上述方法中描述的用户设备UE，并且，该用户设备700中各模块或单元分别用于执行上述方法中UE所执行的各动作或处理过程，这里，为了避免赘述，省略其详细说明。
图8示出了本申请实施例的核心网络控制面设备800的示意性框图。如图8所示，该核心网络控制面设备800包括：接收单元810、处理单元820和发送单元830。
根据本申请实施例的一个方面，其中：
接收单元810，用于从用户设备UE接收位置更新请求消息；
处理单元820，用于根据该位置更新请求消息获取标识信息和服务区域信息，其中，该服务区域信息用于指示第一核心网络控制面设备的服务区域，该第一核心网络控制面设备为能够为该标识信息所标识的该UE所属的租户或用户群组提供专用服务的核心网络控制面设备；
该处理单元820，还用于根据该标识信息和该服务区域信息，确定该UE位于该第一核心网络控制面设备的服务区域内；
发送单元830，用于向该UE发送位置更新请求拒绝消息，该位置更新请求拒绝消息包括携带该标识信息的第一网络切片选择辅助信息和隐式去附着指示，该隐式去附着指示用于指示该UE发起重新附着流程，该第一网络切片选择辅助信息用于选择该第一核心网络控制面设备。
可选地，该位置更新请求消息包括该标识信息。
可选地，该核心网络控制面设备为第二核心网络控制面设备，该第二核心网络控制面设备的服务区域包括该UE发送该位置更新请求消息之前该的第二服务区域，且该第二核心网络控制面设备的服务区域不包括该UE当前所在的第一服务区域，
该接收单元810，还用于从该UE接收附着请求消息；
该处理单元820，还用于根据该附着请求消息，获取该标识信息；
该发送单元830，还用于向该UE发送附着接受消息，该附着接受消息包括该标识信息。
可选地，该核心网络控制面设备为第三核心网络控制面设备，该第三核心网络控制面设备的服务区域包括该UE当前所在的第一服务区域，
该发送单元830，还用于根据该位置更新请求消息向第二核心网络控制面设备发送上下文请求消息，该第二核心网络控制面设备的服务区域包括该UE发送该位置更新请求消息之前所在的第二服务区域；
该接收单元810，还用于从该第二核心网络控制面设备接收该UE的上下文，该UE的上下文包括该标识信息。
可选地，该处理单元820具体用于：
根据该附着请求消息，从用户数据管理器中获取用户签约信息，该用户签约信息中包括该标识信息。
可选地，该处理单元820具体用于：
根据该位置更新请求消息，从网络切片选择功能NSSF设备获取该服务区域信息，或
根据该位置更新请求消息，从该核心网络控制面设备预配置的信息中获取该服务区域信息。
应理解，根据本申请实施例的一个方面，该核心网络控制面设备800可以对应上述方法中描述的目标核心网络控制面设备，并且，该核心网络控制面设备800中各模块或单元分别用于执行上述方法中目标核心网络控制面设备所执行的各动作或处理过程。这里，为了避免赘述，省略其详细说明。
根据本申请实施例的另一方面，其中：
接收单元810，用于从用户设备UE接收附着请求消息；
处理单元820，用于根据该附着请求消息获取标识信息，该标识信息用于标识该UE所属的租户或用户群组；
发送单元830，用于向该UE发送附着接受消息。
可选地，该附着接受消息包括该标识信息。
可选地，该接收单元810，
还用于从第三核心网络控制面设备接收上下文请求消息；
该发送单元830，还用于根据该上下文请求消息向该第三核心网络控制面设备发送该 UE的上下文，该UE的上下文包括该标识信息。
应理解，根据本申请实施例的另一方面，该核心网络控制面设备800可以对应上述方法中描述的第二核心网络控制面设备，此时，该核心网络控制面设备800中各模块或单元分别用于执行上述方法中第二核心网络控制面设备所执行的各动作或处理过程。这里，为了避免赘述，省略其详细说明。
图9示出了根据本申请实施例的用户设备900的示意性结构图。如图9所示，该用户设备900包括：收发器910、处理器920和存储器930。其中，收发器910、处理器920和存储器930之间通过内部连接通路互相通信，传递控制和/或数据信号。
收发器910，用于当用户设备UE从第二服务区域移动到第一服务区域时，向目标核心网络控制面设备发送位置更新请求消息，该目标核心网络控制面设备的服务区域包括该第一服务区域；从该目标核心网络控制面设备接收位置更新请求拒绝消息，该位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式去附着指示，该第一网络切片选择辅助信息包括标识信息，该第一网络切片选择辅助信息用于选择能够为该标识信息所标识的该UE所属的租户或用户群组提供专用服务的第一核心网络控制面设备；根据该隐式去附着指示向该第一核心网络控制面设备发送附着请求消息，以触发该UE的重新附着流程，其中该附着请求消息包括该第一网络切片选择辅助信息。
可选地，该目标核心网络控制面设备为第二核心网络控制面设备，该第二核心网络控制面设备的服务区域还包括该第二服务区域，
该收发器910，还用于向该第二核心网络控制面设备发送附着请求消息；从该第二核心网络控制面设备接收附着接受消息，该附着接受消息包括该标识信息。
可选地，该目标核心网络控制面设备为第三核心网络控制面设备，该第三核心网络控制面设备的服务区域不包括该第二服务区域，
该收发器910，还用于向服务区域包括该第二服务区域的第二核心网络控制面设备发送附着请求消息；从该第二核心网络控制面设备接收附着接受消息，该附着接受消息包括该标识信息。
可选地，该位置更新请求消息包括该标识信息。
应理解，该用户设备900可以对应上述方法中描述的UE。在该处理器920从存储器中调用并运行该计算机程序时，处理器920可用于执行图2至图6所示实施例的方法，并实现该UE在图2至图6所示实施例的功能。
图10示出了根据本申请实施例的核心网络控制面设备1000的示意性结构图。如图10所示，该核心网络控制面设备1000包括：收发器1010、处理器1020和存储器1030。其中，收发器1010、处理器1020和存储器1030之间通过内部连接通路互相通信，传递控制和/或数据信号。
根据本申请实施例的一个方面，其中：
收发器1010，用于从用户设备UE接收位置更新请求消息；
处理器1020，用于根据该位置更新请求消息获取标识信息和服务区域信息，其中，该服务区域信息用于指示第一核心网络控制面设备的服务区域，该第一核心网络控制面设备为能够为该标识信息所标识的该UE所属的租户或用户群组提供专用服务的核心网络控制面设备；
该处理器1020，还用于根据该标识信息和该服务区域信息，确定该UE位于该第一 核心网络控制面设备的服务区域内；
该收发器1010，还用于向该UE发送位置更新请求拒绝消息，该位置更新请求拒绝消息包括携带该标识信息的第一网络切片选择辅助信息和隐式去附着指示，该隐式去附着指示用于指示该UE发起重新附着流程，该第一网络切片选择辅助信息用于选择该第一核心网络控制面设备。
可选地，该位置更新请求消息包括该标识信息。
可选地，该核心网络控制面设备为第二核心网络控制面设备，该第二核心网络控制面设备的服务区域包括该UE发送该位置更新请求消息之前该的第二服务区域，且该第二核心网络控制面设备的服务区域不包括该UE当前所在的第一服务区域，
该收发器1010，还用于从该UE接收附着请求消息；
该处理器1020，还用于根据该附着请求消息，获取该标识信息；
该收发器1010，还用于向该UE发送附着接受消息，该附着接受消息包括该标识信息。
可选地，该核心网络控制面设备为第三核心网络控制面设备，该第三核心网络控制面设备的服务区域包括该UE当前所在的第一服务区域，
该收发器1010，还用于根据该位置更新请求消息向第二核心网络控制面设备发送上下文请求消息，该第二核心网络控制面设备的服务区域包括该UE发送该位置更新请求消息之前所在的第二服务区域；从该第二核心网络控制面设备接收该UE的上下文，该UE的上下文包括该标识信息。
可选地，该处理器1020具体用于：
根据该附着请求消息，从用户数据管理器中获取用户签约信息，该用户签约信息中包括该标识信息。
可选地，该处理器1020具体用于：
根据该位置更新请求消息，从网络切片选择功能NSSF设备获取该服务区域信息，或
根据该位置更新请求消息，从该核心网络控制面设备预配置的信息中获取该服务区域信息。
应理解，根据本申请实施例的一个方面，该核心网络控制面设备1000可以对应上述方法中描述的目标核心网络控制面设备。在该处理器1020从存储器中调用并运行该计算机程序时，处理器1020可用于执行图2至图6所示实施例的方法，并实现目标核心网络控制面设备在图2至图6所示实施例的功能。
根据本申请实施例的一个方面，其中：
收发器1010，用于从用户设备UE接收附着请求消息；
处理器1020，用于根据该附着请求消息获取标识信息，该标识信息用于标识该UE所属的租户或用户群组；
收发器1010，还用于向该UE发送附着接受消息。
可选地，该附着接受消息包括该标识信息。
可选地，该收发器1010，
还用于从第三核心网络控制面设备接收上下文请求消息；根据该上下文请求消息向该第三核心网络控制面设备发送该UE的上下文，该UE的上下文包括该标识信息。
应理解，根据本申请实施例的另一方面，该核心网络控制面设备1000也可以对应上述方法中描述的第二核心网络控制面设备。在该处理器1020从存储器中调用并运行该计算机程序时，处理器1020可用于执行图2至图6所示实施例的方法，并实现第二核心网络控制面设备在图2至图6所示实施例的功能。
本申请实施例可以应用于处理器中，或者由处理器实现。处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是中央处理单元(central processing unit，CPU)、该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件器组合执行完成。软件器可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
还应理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DRRAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
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 (27)

  1. 一种通信方法，其特征在于，包括：
    当用户设备UE从第二服务区域移动到第一服务区域时，所述UE向目标核心网络控制面设备发送位置更新请求消息，所述目标核心网络控制面设备的服务区域包括所述第一服务区域；
    所述UE从所述目标核心网络控制面设备接收位置更新请求拒绝消息，所述位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式去附着指示，所述第一网络切片选择辅助信息包括标识信息，所述第一网络切片选择辅助信息用于选择能够为所述标识信息所标识的所述UE所属的租户或用户群组提供专用服务的第一核心网络控制面设备；
    所述UE根据所述隐式去附着指示向所述第一核心网络控制面设备发送附着请求消息，以触发所述UE的重新附着流程，其中所述附着请求消息包括所述第一网络切片选择辅助信息。
  2. 如权利要求1所述的方法，其特征在于，所述目标核心网络控制面设备为第二核心网络控制面设备，所述第二核心网络控制面设备的服务区域还包括所述第二服务区域，
    在所述UE从所述目标核心网络控制面设备接收位置更新请求拒绝消息之前，所述方法还包括：
    所述UE向所述第二核心网络控制面设备发送附着请求消息；
    所述UE从所述第二核心网络控制面设备接收附着接受消息，所述附着接受消息包括所述标识信息。
  3. 如权利要求1所述的方法，其特征在于，所述目标核心网络控制面设备为第三核心网络控制面设备，所述第三核心网络控制面设备的服务区域不包括所述第二服务区域，
    在所述UE从所述目标核心网络控制面设备接收位置更新请求拒绝消息之前，所述方法还包括：
    所述UE向服务区域包括所述第二服务区域的第二核心网络控制面设备发送附着请求消息；
    所述UE从所述第二核心网络控制面设备接收附着接受消息，所述附着接受消息包括所述标识信息。
  4. 如权利要求1至3中任一项所述的方法，其特征在于，所述位置更新请求消息包括所述标识信息。
  5. 一种通信方法，其特征在于，包括：
    目标核心网络控制面设备从用户设备UE接收位置更新请求消息；
    所述目标核心网络控制面设备根据所述位置更新请求消息获取标识信息和服务区域信息，其中，所述服务区域信息用于指示第一核心网络控制面设备的服务区域，所述第一核心网络控制面设备为能够为所述标识信息所标识的所述UE所属的租户或用户群组提供专用服务的核心网络控制面设备；
    所述目标核心网络控制面设备根据所述标识信息和所述服务区域信息，确定所述UE位于所述第一核心网络控制面设备的服务区域内；
    所述目标核心网络控制面设备向所述UE发送位置更新请求拒绝消息，所述位置更新请求拒绝消息包括携带所述标识信息的第一网络切片选择辅助信息和隐式去附着指示，所述隐式去附着指示用于指示所述UE发起重新附着流程，所述第一网络切片选择 辅助信息用于选择所述第一核心网络控制面设备。
  6. 如权利要求5所述的方法，其特征在于，所述位置更新请求消息包括所述标识信息。
  7. 如权利要求5或6所述的方法，其特征在于，所述目标核心网络控制面设备为第二核心网络控制面设备，所述第二核心网络控制面设备的服务区域包括所述UE发送所述位置更新请求消息之前所述的第二服务区域，且所述第二核心网络控制面设备的服务区域不包括所述UE当前所在的第一服务区域，
    在所述目标核心网络控制面设备从用户设备UE接收位置更新请求消息之前，所述方法还包括：
    所述第二核心网络控制面设备从所述UE接收附着请求消息；
    所述第二核心网络控制面设备根据所述附着请求消息，获取所述标识信息；
    所述第二核心网络控制面设备向所述UE发送附着接受消息，所述附着接受消息包括所述标识信息。
  8. 如权利要求5或6所述的方法，其特征在于，所述目标核心网络控制面设备为第三核心网络控制面设备，所述第三核心网络控制面设备的服务区域包括所述UE当前所在的第一服务区域，
    所述目标核心网络控制面设备根据所述位置更新请求消息获取所述标识信息，包括：
    所述第三核心网络控制面设备根据所述位置更新请求消息向第二核心网络控制面设备发送上下文请求消息，所述第二核心网络控制面设备的服务区域包括所述UE发送所述位置更新请求消息之前所在的第二服务区域；
    所述第三核心网络控制面设备从所述第二核心网络控制面设备接收所述UE的上下文，所述UE的上下文包括所述标识信息。
  9. 如权利要求7所述的方法，其特征在于，所述第二核心网络控制面设备根据所述附着请求消息，获取所述标识信息，包括：
    所述第二核心网络控制面设备根据所述附着请求消息，从用户数据管理器中获取用户签约信息，所述用户签约信息中包括所述标识信息。
  10. 如权利要求5至9中任一项所述的方法，其特征在于，所述目标核心网络控制面设备根据所述位置更新请求消息获取所述服务区域信息，包括：
    所述目标核心网络控制面设备根据所述位置更新请求消息，从网络切片选择功能NSSF设备获取所述服务区域信息，或
    所述目标核心网络控制面设备根据所述位置更新请求消息，从所述目标核心网络控制面设备预配置的信息中获取所述服务区域信息。
  11. 一种通信方法，其特征在于，包括：
    第二核心网络控制面设备从用户设备UE接收附着请求消息；
    所述第二核心网络控制面设备根据所述附着请求消息获取标识信息，所述标识信息用于标识所述UE所属的租户或用户群组；
    所述第二核心网络控制面设备向所述UE发送附着接受消息。
  12. 如权利要求11所述的方法，其特征在于，所述附着接受消息包括所述标识信息。
  13. 如权利要求11或12所述的方法，其特征在于，所述方法还包括：
    所述第二核心网络控制面设备从第三核心网络控制面设备接收上下文请求消息；
    所述第二核心网络控制面设备根据所述上下文请求消息向所述第三核心网络控制面设备发送所述UE的上下文，所述UE的上下文包括所述标识信息。
  14. 一种用户设备UE，其特征在于，包括：
    发送单元，用于当用户设备UE从第二服务区域移动到第一服务区域时，向目标核心网络控制面设备发送位置更新请求消息，所述目标核心网络控制面设备的服务区域包括所述第一服务区域；
    接收单元，用于从所述目标核心网络控制面设备接收位置更新请求拒绝消息，所述位置更新请求拒绝消息包括第一网络切片选择辅助信息和隐式去附着指示，所述第一网络切片选择辅助信息包括标识信息，所述第一网络切片选择辅助信息用于选择能够为所述标识信息所标识的所述UE所属的租户或用户群组提供专用服务的第一核心网络控制面设备；
    所述发送单元，还用于根据所述隐式去附着指示向所述第一核心网络控制面设备发送附着请求消息，以触发所述UE的重新附着流程，其中所述附着请求消息包括所述第一网络切片选择辅助信息。
  15. 如权利要求14所述的UE，其特征在于，所述目标核心网络控制面设备为第二核心网络控制面设备，所述第二核心网络控制面设备的服务区域还包括所述第二服务区域，
    所述发送单元，还用于向所述第二核心网络控制面设备发送附着请求消息；
    所述接收单元，还用于从所述第二核心网络控制面设备接收附着接受消息，所述附着接受消息包括所述标识信息。
  16. 如权利要求14所述的UE，其特征在于，所述目标核心网络控制面设备为第三核心网络控制面设备，所述第三核心网络控制面设备的服务区域不包括所述第二服务区域，
    所述发送单元，还用于向服务区域包括所述第二服务区域的第二核心网络控制面设备发送附着请求消息；
    所述接收单元，还用于从所述第二核心网络控制面设备接收附着接受消息，所述附着接受消息包括所述标识信息。
  17. 如权利要求14至16中任一项所述的UE，其特征在于，所述位置更新请求消息包括所述标识信息。
  18. 一种核心网络控制面设备，其特征在于，包括：
    接收单元，用于从用户设备UE接收位置更新请求消息；
    处理单元，用于根据所述位置更新请求消息获取标识信息和服务区域信息，其中，所述服务区域信息用于指示第一核心网络控制面设备的服务区域，所述第一核心网络控制面设备为能够为所述标识信息所标识的所述UE所属的租户或用户群组提供专用服务的核心网络控制面设备；
    所述处理单元，还用于根据所述标识信息和所述服务区域信息，确定所述UE位于所述第一核心网络控制面设备的服务区域内；
    发送单元，用于向所述UE发送位置更新请求拒绝消息，所述位置更新请求拒绝消息包括携带所述标识信息的第一网络切片选择辅助信息和隐式去附着指示，所述隐式去附着指示用于指示所述UE发起重新附着流程，所述第一网络切片选择辅助信息用于选 择所述第一核心网络控制面设备。
  19. 如权利要求18所述的核心网络控制面设备，其特征在于，所述位置更新请求消息包括所述标识信息。
  20. 如权利要求18或19所述的核心网络控制面设备，其特征在于，所述核心网络控制面设备为第二核心网络控制面设备，所述第二核心网络控制面设备的服务区域包括所述UE发送所述位置更新请求消息之前所述的第二服务区域，且所述第二核心网络控制面设备的服务区域不包括所述UE当前所在的第一服务区域，
    所述接收单元，还用于从所述UE接收附着请求消息；
    所述处理单元，还用于根据所述附着请求消息，获取所述标识信息；
    所述发送单元，还用于向所述UE发送附着接受消息，所述附着接受消息包括所述标识信息。
  21. 如权利要求18或19所述的核心网络控制面设备，其特征在于，所述核心网络控制面设备为第三核心网络控制面设备，所述第三核心网络控制面设备的服务区域包括所述UE当前所在的第一服务区域，
    所述发送单元，还用于根据所述位置更新请求消息向第二核心网络控制面设备发送上下文请求消息，所述第二核心网络控制面设备的服务区域包括所述UE发送所述位置更新请求消息之前所在的第二服务区域；
    所述接收单元，还用于从所述第二核心网络控制面设备接收所述UE的上下文，所述UE的上下文包括所述标识信息。
  22. 如权利要求20所述的核心网络控制面设备，其特征在于，所述处理单元具体用于：
    根据所述附着请求消息，从用户数据管理器中获取用户签约信息，所述用户签约信息中包括所述标识信息。
  23. 如权利要求18至22中任一项所述的核心网络控制面设备，其特征在于，所述处理单元具体用于：
    根据所述位置更新请求消息，从网络切片选择功能NSSF设备获取所述服务区域信息，或
    根据所述位置更新请求消息，从所述核心网络控制面设备预配置的信息中获取所述服务区域信息。
  24. 一种核心网络控制面设备，其特征在于，包括：
    接收单元，用于从用户设备UE接收附着请求消息；
    处理单元，用于根据所述附着请求消息获取标识信息，所述标识信息用于标识所述UE所属的租户或用户群组；
    发送单元，用于向所述UE发送附着接受消息。
  25. 如权利要求24所述的核心网络控制面设备，其特征在于，所述附着接受消息包括所述标识信息。
  26. 如权利要求24或25所述的核心网络控制面设备，其特征在于，所述接收单元，
    还用于从第三核心网络控制面设备接收上下文请求消息；
    所述发送单元，还用于根据所述上下文请求消息向所述第三核心网络控制面设备发送所述UE的上下文，所述UE的上下文包括所述标识信息。
  27. 一种计算机可读存储介质，其特征在于，包括指令，当其在计算机上运行时，使得计算机执行权利要求1-13中任意一项所述的方法。
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