WO2021052107A1 - 网络切片选择的方法、装置、系统和存储介质 - Google Patents

网络切片选择的方法、装置、系统和存储介质 Download PDF

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Publication number
WO2021052107A1
WO2021052107A1 PCT/CN2020/110492 CN2020110492W WO2021052107A1 WO 2021052107 A1 WO2021052107 A1 WO 2021052107A1 CN 2020110492 W CN2020110492 W CN 2020110492W WO 2021052107 A1 WO2021052107 A1 WO 2021052107A1
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Prior art keywords
network slice
information
user
network
configuration information
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PCT/CN2020/110492
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English (en)
French (fr)
Inventor
周俊超
方琰崴
蔡建楠
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中兴通讯股份有限公司
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Priority to EP20865993.8A priority Critical patent/EP4013128A4/en
Publication of WO2021052107A1 publication Critical patent/WO2021052107A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0894—Policy-based network configuration management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0895—Configuration of virtualised networks or elements, e.g. virtualised network function or OpenFlow elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/40—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks using virtualisation of network functions or resources, e.g. SDN or NFV entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0806—Configuration setting for initial configuration or provisioning, e.g. plug-and-play
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0896—Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5041—Network service management, e.g. ensuring proper service fulfilment according to agreements characterised by the time relationship between creation and deployment of a service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a method for selecting a network slice.
  • Network slicing is a new type of communication network service technology and architecture defined based on NFV (Network Function Virtualization, "NFV”) and SDN (Software Define Network, "SDN”) technologies.
  • NFV Network Function Virtualization
  • SDN Software Define Network
  • a complete network slice is generally composed of core network slice subnets, bearer slice subnets, and wireless slice subnets, and is an end-to-end logical network.
  • each network slice instance is deployed with a network slice selection function network element NSSF (Network Slice Selection Function), which is used for slice selection, and user roaming between slices is also visited
  • NSSF Network Slice Selection Function
  • the local NSSF interacts with the home NSSF to complete the user's selection of slice instances in the visited and home locations.
  • the embodiment of the present application provides a method for selecting a network slice, which is applied to a network slice selection function network element NSSF.
  • the NSSF is shared by network slices of multiple core networks.
  • the method includes: receiving a slice selection request, and The slice selection request is used to request the selection of a network slice for a roaming user, the slice selection request includes user information; the target network slice is determined according to a preset roaming strategy and the user information; and a response message to the slice selection request is sent, The response message carries identification information of the target network slice.
  • the embodiment of the present application also provides a device for selecting a network slice.
  • the device for selecting is shared by network slices of multiple core networks.
  • the device for selecting includes: a receiving module for receiving a slice selection request.
  • the request is used to request the selection of network slices for roaming users, and the slice selection request includes user information;
  • the selection module is used to determine the target network slice according to the preset roaming strategy and the user information;
  • the sending module is used to send all the network slices.
  • the response message of the slice selection request where the response message carries the identification information of the target network slice.
  • An embodiment of the present application also provides a network slice selection function network element, including: at least one processor; and, a memory communicatively connected with the at least one processor; wherein the memory stores the memory that can be used by the at least one processor; An instruction executed by one processor, the instruction being executed by the at least one processor, so that the at least one processor can execute the above-mentioned method for selecting a network slice.
  • the embodiment of the present application also provides a network slice selection system, including: network slices of multiple core networks, and the above-mentioned network slice selection function network element, the network slice selection function network element and the network slices of the multiple core networks connection.
  • the embodiment of the present application also provides a computer-readable storage medium storing a computer program, wherein the computer program is characterized in that the above-mentioned network slice selection method is implemented when the computer program is executed by a processor.
  • Figure 1 is a schematic diagram of a complete network slicing architecture according to the prior art
  • Fig. 2 is a schematic structural diagram of the NSSF shared by multiple core network network slices according to the first embodiment of the present application;
  • Fig. 3 is a flowchart of a method for selecting a network slice according to the first embodiment of the present application
  • Fig. 4 is an interactive flowchart of a method for selecting a network slice according to the first embodiment of the present application
  • Fig. 5 is a flowchart of a method for selecting a network slice according to a second embodiment of the present application
  • FIG. 6 is a structural block diagram of a device for selecting a network slice according to a third embodiment of the present application.
  • FIG. 7 is a structural block diagram of a network element with a network slice selection function according to a fourth embodiment of the present application.
  • Fig. 8 is a structural block diagram of a network slice selection system according to the fifth embodiment of the present application.
  • the first embodiment of the present application relates to a method for selecting a network slice, which is applied to a network slice selection function network element NSSF, and the NSSF is shared by network slices of multiple core networks.
  • the 3rd Generation Partnership Project 3GPP (3rd Generation Partnership Project) standard defines that the core network slicing subnet is composed of multiple core network element instances, such as: access and mobility management function network element AMF (Access and Mobility Management Function), session management function network element SMF (Session Management Function), user plane function network element UPF (User Plane function), policy control function network element PCF (Policy Control Function), unified data management network element UDM (Unified) Data Management), authentication server function network element AUSF (Authentication Server Function), unstructured data storage function network element UDSF (Unstructured Data Storage Function), unified data storage network element UDR (Unified Data Repository), network storage library function network NRF (Network Repository Function), Network Slice Selection Function (NSSF), Network Exposure Function (NEF), etc.
  • AMF Access and Mobility Management Function
  • Session Management Function Session Management Function
  • user plane function network element UPF User Plane function
  • PCF Policy Control Function
  • unified data management network element UDM Unified) Data Management
  • NSSF is shared by network slices of multiple core networks ( The NRF in the schematic diagram can be shared and deployed with NSSF, or deployed in different slice instances), and other core network elements are exclusively shared by each core network slice.
  • the visited place and the home place share NSSF , The user's slice selection in the visited place and the home place is completed by the shared NSSF.
  • the network slice selection method of this embodiment is applied to a network slice selection function network element NSSF, and includes: receiving a slice selection request, where the slice selection request is used to request the selection of a network slice for a roaming user, and the slice selection request includes User information; determine a target network slice according to a preset roaming strategy and the user information; send a response message to the slice selection request, the response message carrying identification information of the target network slice.
  • a method for selecting a network slice in this embodiment is shown in flowchart 3, and specifically includes the following steps:
  • Step 101 Receive a slice selection request including user information.
  • the user information includes the single network slice selection auxiliary information S-NSSAI of the network slice where the user is currently located, and one or any combination of the following information: location information of the user,
  • the subscription permanently indicates SUPI, the default access and mobility management function network element AMF information of the user visited.
  • the slice selection request received by the NSSF is sent by the default AMF of the user's visitor.
  • Figure 4 is an interactive flow chart for the user to select a network slice while roaming. As shown in Figure 3, when a roaming user needs to select a slice, the user terminal executes step 2 and sends a registration request initiated by the roaming user. Network and bearer slice subnet, the default AMF of the visited place receives the registration request, the registration request carries the requested S-NSSAI (the S-NSSAI of the user’s current network slice), and the user’s location information or the user’s subscription permanent sign SUPI After receiving the user’s registration request, the visitor’s default AMF will perform step 3.
  • S-NSSAI the S-NSSAI of the user’s current network slice
  • the visitor’s default AMF interacts with the UDM/AUSF/UDR of the user’s home to complete the user’s authentication and authorization process and obtain the user’s contract S-NSSAI information (the S-NSSAI of the network slice where the user is currently located); afterwards, the visited place defaults to AMF to perform step 4 and sends a slice selection request to NSSF.
  • the slice selection request carries the information carried in the above registration request, and also includes the visited place Default AMF information.
  • Step 102 Determine the target network slice according to the preset roaming strategy and user information; specifically, the roaming strategy includes multiple sets of configuration information, and each set of the configuration information corresponds to one network slice; according to the preset The roaming strategy and the user information determine the target network slice, including: searching for a set of configuration information matching the user information in the roaming strategy according to the user information; and combining the found set of configuration information The corresponding network slice is determined as the target network slice.
  • NSSF performs step 1 to pre-configure the user roaming policy.
  • the group of configuration information includes the single network slice selection auxiliary information S-NSSAI of the corresponding network slice, and one or any combination of the following information: the location information of the corresponding network slice, the corresponding network slice The permanent sign SUPI of the subscribers of the network slice and the preset access and mobility management function network element AMF information.
  • one set of configuration information is randomly selected from the multiple sets of configuration information found ; Use the randomly selected group of configuration information as a group of configuration information that matches the user information.
  • the NSSF performs step 5 and accepts information such as S-NSSAI (S-NSSAI of the target network slice) based on the roaming policy decision.
  • S-NSSAI S-NSSAI of the target network slice
  • Step 103 Send a response message for the slice selection request
  • the response message carries identification information of the target network
  • the identification information of the target network slice includes the single network slice selection auxiliary information S-NSSAI and the mapped S-NSSAI of the target network slice.
  • the NSSF sends a response message to the slice selection request to the default AMF of the user's visitor.
  • the NSSF executes step 6 to send a response message for the slice selection request to the default AMF of the user's visited place, where the response message carries the accepted S-NSSAI (S-NSSAI of the target network slice) used by the visited place and the mapped S -NSSAI (S-NSSAI of the user's current network slice) and other information.
  • the visitor defaults that after the AMF receives the slice selection request response message, it performs step 7 and sends a registration request response message to the user via the wireless slice subnet and the bearer slice subnet, and the registration request response message carries the slice selection request response.
  • the specific configuration method of the roaming strategy is as follows: add a roaming strategy configuration information table, and the operator configures the roaming strategy according to specific needs: including but not limited to the following strategies:
  • Roaming strategy plan 1 Based on the slice instance and location information managed by NSSF, design a roaming strategy configuration information table, and configure specific roaming strategies, as shown in Table 1:
  • Roaming strategy plan 2 Based on the user SUPI (Subscribed User Permanent Identity) number segment and AMF information, design a roaming strategy table and configure specific roaming strategies, as shown in Table 2:
  • the slice instance identifier is the identifier of the specific deployed slice instance, which uniquely identifies the slice instance;
  • the location information is the location information served by the slice instance, such as ZC (Zone Code, area code) list, RAC (Routing Area Code, routing area code) List, TAC (Track Area Code, Tracking Area Code) list and other NRF information;
  • SUPI information is the SUPI number segment information serving the slice instance; NRF identification or address information serving the slice instance;
  • AMF information is the AMF serving the slice instance Identification or address information;
  • AMF SetID is the identification information of the AMF set serving the slice instance;
  • S-NSSAIs is the S-NSSAI information serving the slice instance; the mapped S-NSSAIs are the home slice S- mapped after the user roams to this slice NSSAI.
  • the NSSF when the NSSF receives the slice selection request sent by the AMF, it finds a set of configuration information matching the user information carried in the slice selection request in the above roaming policy configuration information table, and according to this The configuration information determines the user's target network slice, and returns the decision to accept S-NSSAI information, configure S-NSSAI, mapped S-NSSAI, NRF identification information, or slice instance identification information, etc.
  • the NSSF when multiple network slices share the network slice selection function network element NSSF, when the NSSF receives a slice selection request from a roaming user, it is based on the preset roaming policy and the user in the slice selection request. Information, determine the target network slice for user handover, and through the preset roaming strategy, the shared NSSF can reasonably select network slices for roaming users, which effectively solves the problem of network slice selection when users roam between network slices. It is a standard protocol The effective supplement and perfection.
  • the second embodiment of the present application relates to a method for selecting a network slice, which is applied to a network slice selection function network element NSSF, and the NSSF is shared by network slices of multiple core networks.
  • the method includes: receiving a slice selection request, the slice selection request is used to request to select a network slice for a roaming user, the slice selection request includes user information; and according to the user information, according to the priority of each configuration information , Searching for a set of configuration information matching the user information in the roaming policy; determining the network slice corresponding to the found set of configuration information as the target network slice; sending the slice selection request A response message that carries the identification information of the target network slice.
  • a method for selecting a network slice in this embodiment is shown in flowchart 5. It includes the following steps:
  • Step 201 Receive a slice selection request including user information; this step is similar to step 101 of the first embodiment, and will not be repeated here;
  • Step 202 Search for the configuration information group matching the user information according to the priority of the configuration information; specifically, the user information includes the single network slice selection auxiliary information S-NSSAI of the network slice where the user is currently located, and the following One of the information or any combination thereof: the location information of the user, the permanent sign SUPI of the user's subscription, the default access and mobility management function network element AMF information of the user visited.
  • Each group of the configuration information includes the single network slice selection auxiliary information S-NSSAI of the corresponding network slice, and one or any combination of the following information: location information of the corresponding network slice, and the corresponding network slice The permanent sign SUPI of the subscribers and the preset access and mobility management function network element AMF information.
  • each piece of configuration information in each group of the configuration information is set with different priorities, and according to the priority of each piece of configuration information, in order from high to low, the user information is searched in turn.
  • the matching configuration information group each time the configuration information group is searched, the next priority search is performed in the found configuration information group.
  • Step 203 Determine whether the number of configuration information groups found matching the user information is 1, if yes, go to step 204, if not, go to step 202;
  • Step 204 Determine the network slice corresponding to a group of matched configuration information as the target network slice
  • Step 205 Send a response message for the slice selection request; this step is similar to step 103 in the first embodiment, and will not be repeated here;
  • the roaming strategy plan 2 in the first embodiment uses the roaming strategy plan 2 in the first embodiment (based on the user SUPI number and AMF information, design a roaming strategy table, and configure a specific roaming strategy) as a roaming strategy, and configure information for the roaming strategy
  • the configuration information in the table sets the priority, specifically as follows, talk about the user SUPI number segment is set to the first priority, the AMF information is set to the second priority, the mapped S-NSSAI is set to the third priority, roaming policy configuration
  • the information table is shown in Table 3:
  • the user initiates a registration request via the wireless slice subnet and the bearer slice subnet.
  • the request message carries the requested S-NSSAI (01000001), the user's SUPI information (4600321), and the default AMF information (220.116.15.95) of the user's visitor. .
  • the visited place AMF interacts with the home UDM/AUSF/UDR, completes the user's authentication and authorization process, and obtains the S-NSSAI (01000001) signed by the user.
  • the default AMF of the visited place sends a slice selection request message to the NSSF, and the request message carries the requested S-NSSAI (01000001), the user's SUPI information (4600321), and the default AMF information (220.116.15.95) of the user's visited place.
  • the shared NSSF determines the target network slice according to the request message information and the local roaming strategy: according to the SUPI information of the first priority to determine the matching network slice NSID-NJ-ZTE-eMBB-02 and NSID-NJ-ZTE-eMBB-03 , And then according to the second priority AMF information in the already matched network slices, further determine the matching network slices NSID-NJ-ZTE-eMBB-02 and NSID-NJ-ZTE-eMBB-03, and then the matching network slices If the number is not 1, then according to the mapped S-NSSAI of the third priority, among the network slices that have been matched, further determine the matching network slice NSID-NJ-ZTE-eMBB-02 (the mapped S-NSSAI corresponds to the request message S-NSSAI), and the network slice whose slice instance is marked as NSID-NJ-ZTE-eMBB-02 is determined as the target network slice.
  • the shared NSSF returns a slice selection response message to the default AMF of the visited area.
  • the message carries the accepted S-NSSAI (01000002) of the target network slice, the configured S-NSSAI (such as 01000002), and the mapped S-NSSAI (such as 01000001). ) And other information.
  • the AMF in the visited place responds to the user with a registration request response message via the wireless slice subnet and the bearer slice subnet.
  • the message carries the S-NSSAI (01000002), the configured S-NSSAI (01000002), and the configured S-NSSAI (01000002) used by the end user in the visited place.
  • the mapped S-NSSAI (such as: 01000001) and other information.
  • the user initiates subsequent procedures such as session establishment based on the accepted S-NSSAIs (01000002).
  • the NSSF when multiple network slices share the network slice selection function network element NSSF, the NSSF receives the slice selection request of the roaming user, and according to the user information in the slice selection request, User information, according to the priority of each configuration information, search for a group of configuration information matching the user information in the roaming policy; determine the network slice corresponding to the found group of configuration information as the user
  • the target network slice for handover, through the preset roaming strategy, enables the shared NSSF to reasonably select network slices for roaming users, effectively solving the problem of network slice selection when users roam between network slices, and is an effective supplement to the standard protocol. perfect.
  • the third embodiment of the present application relates to a device for selecting a network slice.
  • the device for selecting is shared by network slices of multiple core networks.
  • the device for selecting includes: a receiving module 301, a selecting module 302, and a sending module 303.
  • the specific structure is as follows As shown in Figure 6:
  • the receiving module 301 is configured to receive a slice selection request, the slice selection request is used to request to select a network slice for a roaming user, and the slice selection request includes user information; the selection module 302 is used to select a network slice according to a preset roaming strategy and The user information determines the target network slice; the sending module 303 is configured to send a response message to the slice selection request, and the response message carries identification information of the target network slice.
  • the roaming strategy includes multiple sets of configuration information, and each set of configuration information corresponds to one of the network slices; the determining the target network slice according to the preset roaming strategy and the user information includes : According to the user information, search for a set of configuration information matching the user information in the roaming policy; determine the network slice corresponding to the found set of configuration information as the target network slice.
  • the user information includes the single network slice selection auxiliary information S-NSSAI of the network slice where the user is currently located, and one or any combination of the following information: location information of the user ,
  • the user's subscription permanently indicates SUPI, and the default access and mobility management function network element AMF information of the user's visitor.
  • Each group of the configuration information includes the single network slice selection auxiliary information S-NSSAI of the corresponding network slice, and one or any combination of the following information: location information of the corresponding network slice, and the corresponding network slice
  • each piece of configuration information in each group of the configuration information is set with different priorities; according to the user information, the roaming policy searches for one that matches the user information.
  • Group configuration information including: according to the priority of each piece of configuration information, in descending order, sequentially searching for configuration information matching the user information until each piece of configuration information in a group of configuration information is found Both match with the user information.
  • the searching for a set of configuration information matching the user information in the roaming policy according to the user information includes: if according to the user information, searching in the roaming policy When multiple sets of configuration information matching the user information are found, a set of configuration information is randomly selected from the multiple sets of configuration information found; the randomly selected set of configuration information is used as the user information A matching set of configuration information.
  • the identification information of the target network slice includes the single network slice selection auxiliary information S-NSSAI and the mapped S-NSSAI of the target network slice.
  • this embodiment is a device embodiment corresponding to the first embodiment, and this embodiment can be implemented in cooperation with the first embodiment.
  • the related technical details mentioned in the first embodiment are still valid in this embodiment, and in order to reduce repetition, they will not be repeated here.
  • the related technical details mentioned in this embodiment can also be applied to the first embodiment.
  • modules involved in this embodiment are all logical modules.
  • a logical unit can be a physical unit, a part of a physical unit, or multiple physical units. The combination of units is realized.
  • this embodiment does not introduce units that are not closely related to solving the technical problems proposed by the present application, but this does not indicate that there are no other units in this embodiment.
  • the fourth embodiment of the present application relates to a network slice selection function network element.
  • the network slice selection network element includes at least one processor 401; and a memory 402 communicatively connected with the at least one processor 401; and , A communication component 403 that is communicatively connected with the network slice selection function network element.
  • the communication component 403 receives and sends data under the control of the processor 401; wherein the memory 402 stores instructions that can be executed by at least one processor 401, and the instructions are at least A processor 401 executes to implement the foregoing embodiment of the method for selecting network slices.
  • the electronic device includes: one or more processors 401 and a memory 402, and one processor 401 is taken as an example in FIG. 6.
  • the processor 401 and the memory 402 may be connected through a bus or in other ways. In FIG. 6, the connection through a bus is taken as an example.
  • the memory 402, as a computer-readable storage medium, can be used to store computer software programs, computer-executable programs, and modules.
  • the processor 401 executes various functional applications and data processing of the device by running computer software programs, instructions, and modules stored in the memory 402, that is, realizes the above-mentioned network slice selection method.
  • the memory 402 may include a program storage area and a data storage area.
  • the program storage area may store an operating system and an application program required by at least one function; the storage data area may store a list of options and the like.
  • the memory 402 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
  • the memory 402 may optionally include a memory remotely provided with respect to the processor 401, and these remote memories may be connected to an external device through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
  • One or more modules are stored in the memory 402, and when executed by one or more processors 401, the method for selecting a network slice in any of the foregoing method embodiments is executed.
  • the memory and the processor are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects one or more processors and various circuits of the memory together.
  • the bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are all known in the art, and therefore, no further description will be given herein.
  • the bus interface provides an interface between the bus and the transceiver.
  • the transceiver may be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on the transmission medium.
  • the data processed by the processor is transmitted on the wireless medium through the antenna, and further, the antenna also receives the data and transmits the data to the processor.
  • the processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the memory can be used to store data used by the processor when performing operations.
  • the fifth embodiment of the present application relates to a network slice selection system. As shown in FIG. 8, it includes: network slices of multiple core networks and network slice selection function network elements. The network slice connections of each core network are shared by the network slices of each core network.
  • the network slice selection function network element in this embodiment is the same as the network slice selection function network element in the fourth embodiment, and will not be repeated here.
  • the NSSF when multiple network slices share the network slice selection function network element NSSF, when the NSSF receives a slice selection request from a roaming user, it determines the user to switch according to the preset roaming strategy and the user information in the slice selection request.
  • the target network slice effectively solves the problem of selecting network slices when users roam between network slices, and is an effective supplement and improvement to the standard protocol.
  • the sixth embodiment of the present application relates to a computer-readable storage medium, which stores a computer program.
  • the computer program is executed by the processor, the above-mentioned network slice selection method embodiment is realized.
  • the program is stored in a storage medium and includes several instructions to enable a device ( It may be a single-chip microcomputer, a chip, etc.) or a processor (processor) that executes all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes. .

Abstract

本申请实施例涉及通信技术领域，公开了一种网络切片选择的方法、装置、系统和存储介质。本申请中，在多个网络切片共享网络切片选择功能网元NSSF的情况下，NSSF接收漫游用户的切片选择请求时根据预设的漫游策略和切片选择请求中的用户信息，确定用户切换的目标网络切片，通过预设的漫游策略使得共享NSSF能够为漫游用户合理地选择网络切片，有效地解决了用户在网络切片间漫游时网络切片的选择问题，是对标准协议的有效补充和完善。

Description

网络切片选择的方法、装置、系统和存储介质
相关申请的交叉引用
本申请基于申请号为201910893527.4、申请日为2019年9月20日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此以引入方式并入本申请。
技术领域
本申请实施例涉及通信技术领域，特别涉及一种网络切片的选择方法。
背景技术
网络切片是基于NFV(Network Function Virtualization，网络功能虚拟化，简称“NFV”)和SDN(Software Define Network，软件定义网络，简称“SDN”)技术定义的一种新型通信网络服务技术和架构，其基于虚拟或物理的资源构建一个端到端隔离的逻辑通信网络，按需为用户提供一种或多种特定的通信网络服务。
在5G系统中，如图1所示，一个完整的网络切片一般由核心网切片子网、承载切片子网和无线切片子网组成，是一个端到端的逻辑网络。在这种典型的网络切片组网架构中，每个网络切片实例中均部署有网络切片选择功能网元NSSF(Network Slice Selection Function)，用于切片的选择，用户在切片间的漫游也由拜访地NSSF与归属地NSSF交互，完成用户在拜访地和归属地的切片实例选择。
发明人发现如上所述的情况中至少存在如下问题：在实际工程应用和部署中，不是每个网络切片实例中都需要部署NSSF，而多个网络切片实例可以共享一个NSSF，在这种部署场景下，如何由共享的NSSF实现用户在拜访地和归属地的切片选择，在目前的技术规范中并没有涉及。
发明内容
本申请的实施例提供了一种网络切片的选择方法，应用于网络切片选择功能网元NSSF，所述NSSF被多个核心网的网络切片共享，所述方法包括：接收切片选择请求，所述切片选择请求用于请求为漫游的用户选择网络切片，所述切片选择请求中包括用户信息；根据预设 的漫游策略和所述用户信息确定目标网络切片；发送所述切片选择请求的响应消息，所述响应消息携带所述目标网络切片的标识信息。
本申请的实施例还提供了一种网络切片的选择装置，所述选择装置被多个核心网的网络切片共享，所述选择装置包括：接收模块，用于接收切片选择请求，所述切片选择请求用于请求为漫游的用户选择网络切片，所述切片选择请求中包括用户信息；选择模块，用于根据预设的漫游策略和所述用户信息确定目标网络切片；发送模块，用于发送所述切片选择请求的响应消息，所述响应消息携带所述目标网络切片的标识信息。
本申请的实施例还提供了一种网络切片选择功能网元，包括：至少一个处理器；以及，与所述至少一个处理器通信连接的存储器；其中，所述存储器存储有可被所述至少一个处理器执行的指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器能够执行上述的网络切片的选择方法。
本申请的实施例还提供了一种网络切片选择系统，包括：多个核心网的网络切片，以及上述网络切片选择功能网元，所述网络切片选择功能网元与多个核心网的网络切片连接。
本申请的实施例还提供了一种计算机可读存储介质，存储有计算机程序，其特征在于，所述计算机程序被处理器执行时实现上述的网络切片的选择方法。
附图说明
一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定。
图1是根据现有技术中的完整的网络切片的架构示意图；
图2是根据本申请第一实施例的NSSF被多个核心网网络切片共享的结构示意图；
图3是根据本申请第一实施例的网络切片的选择方法的流程图；
图4根据本申请第一实施例的网络切片的选择方法的交互流程图；
图5根据本申请第二实施例的网络切片的选择方法的流程图；
图6是根据本申请第三实施例的网络切片的选择装置的结构方框图；
图7是根据本申请第四实施例的网络切片选择功能网元的结构方框图；
图8根据本申请第五实施例的网络切片选择系统的结构方框图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请的各实施例进行详细的阐述。然而，本领域的普通技术人员可以理解，在本申请各实施例中，为了使读者更好地理解本申请而提出了许多技术细节。但是，即使没有这些技术细节和基于以下各实施例的种种变化和修改，也可以实现本申请所要求保护的技术方案。以下各个实施例的划分是为了描述方便，不应对本申请的具体实现方式构成任何限定，各个实施例在不矛盾的前提下可以相互结合相互引用。
本申请的第一实施例涉及一种网络切片的选择方法，应用于网络切片选择功能网元NSSF，所述NSSF被多个核心网的网络切片共享。
具体地说，第三代合作伙伴项目3GPP(3rd Generation Partnership Project)标准定义，核心网网络切片子网由多个核心网网元的实例组成，如：接入和移动管理功能网元AMF(Access and Mobility Management Function)、会话管理功能网元SMF(Session Management Function)、用户面功能网元UPF(User Plane function)、策略控制功能网元PCF(Policy Control Function)、统一数据管理网元UDM(Unified Data Management)、鉴权服务器功能网元AUSF(Authentication Server Function)、非结构化数据存储功能网元UDSF(Unstructured Data Storage Function)、统一数据存储网元UDR(Unified Data Repository)、网络存储库功能网元NRF(Network Repository Function)、网络切片选择功能网元NSSF(Network Slice Selection Function)、网络开放功能网元NEF(Network Exposure Function)等。而在本实施例中，不需要在每个核心网网络切片子网中均部署NSSF，而是多个网络切片共享一个NSSF，如图2所示，NSSF被多个核心网的网络切片共享(示意图中的NRF可以与NSSF一起共享部署，也可以部署在不同的切片实例中)，其他核心网网元由各个核心网网络切片专享，在这种部署场景下，拜访地和归属地共享NSSF，用户在拜访地和归属地的切片选择由共享的NSSF完成。
本实施例的网络切片的选择方法，应用于网络切片选择功能网元NSSF，包括：接收切片选择请求，所述切片选择请求用于请求为漫游的用户选择网络切片，所述切片选择请求中包括用户信息；根据预设的漫游策略和所述用户信息确定目标网络切片；发送所述切片选择请求的响应消息，所述响应消息携带所述目标网络切片的标识信息。
下面对本实施例的一种网络切片的选择方法的实现细节进行具体的说明，以下内容仅为方便理解提供的实现细节，并非实施本方案的必须。
本实施例中的一种网络切片的选择方法如流程图3所示，具体包括以下步骤：
步骤101：接收包括用户信息的切片选择请求。
具体地说，用户信息包括所述用户当前所处的所述网络切片的单一网络切片选择辅助信息S-NSSAI，以及以下信息之一或其任意组合：所述用户的位置信息、所述用户的签约永久标示SUPI、所述用户拜访地默认的接入和移动管理功能网元AMF信息。
在一个具体的例子中，NSSF接收到的切片选择请求是由用户拜访地默认的AMF发出的。图4为用户在漫游时进行网络切片选择的交互流程图，如图3所示，当漫游的用户需要进行切片选择时，用户终端执行步骤2，发送漫游用户发起的注册请求，经过无线切片子网和承载切片子网，拜访地默认的AMF接收注册请求，注册请求中携带请求的S-NSSAI(用户当前所处网络切片的S-NSSAI)，以及用户的位置信息或用户的签约永久标示SUPI等信息，拜访地默认AMF接收到用户的注册请求后执行步骤3，拜访地默认的AMF与用户归属地的UDM/AUSF/UDR进行交互，完成用户的鉴权授权过程，并获取到用户签约的S-NSSAI信息(用户当前所处网络切片的S-NSSAI)；之后拜访地默认AMF执行步骤4，发送切片选择请求到NSSF，切片选择请求中携带上述注册请求中携带的信息，还包括拜访地默认AMF的信息。
步骤102：根据预设的漫游策略和用户信息确定目标网络切片；具体地说，所述漫游策略包括多组配置信息，且每组所述配置信息对应一个所述网络切片；所述根据预设的漫游策略和所述用户信息确定目标网络切片，包括：根据所述用户信息，在所述漫游策略中查找与所述用户信息匹配的一组配置信息；将所述查找到的一组配置信息所对应的网络切片，确定为所述目标网络切片。
在一个具体的例子中，如图4所示，NSSF执行步骤1，预先配置好用户漫游策略。
具体地说，组所述配置信息包括所述对应的网络切片的单一网络切片选择辅助信息S-NSSAI，以及以下信息之一或其任意组合：所述对应的网络切片的位置信息、所述对应的网络切片的签约用户的永久标示SUPI和预设的接入和移动管理功能网元AMF信息。
具体地说，若根据所述用户信息，在所述漫游策略中查找到与所述用户信息匹配的多组配置信息，则在所述查找到的多组配置信息中，随机选择一组配置信息；将所述随机选择的一组配置信息，作为与所述用户信息匹配的一组配置信息。
在一个具体的例子中，如图4所示，NSSF执行步骤5，基于漫游策略决策接受S-NSSAI(目标网络切片的S-NSSAI)等信息。
步骤103：发送切片选择请求的响应消息；
具体地说，响应消息中携带目标网络的标识信息，所述目标网络切片的标识信息包括所述目标网络切片的单一网络切片选择辅助信息S-NSSAI和映射的S-NSSAI。
在一个具体的例子中，NSSF发送切片选择请求的响应消息到用户拜访地默认AMF。如图4所示，NSSF执行步骤6，发送切片选择请求的响应消息到用户拜访地默认AMF，其中响应消息携带拜访地使用的接受S-NSSAI(目标网络切片的S-NSSAI)、映射的S-NSSAI(用户当前网络切片的S-NSSAI)等信息。拜访地默认AMF接收到上述切片选择请求响应消息后，执行步骤7，经无线切片子网和承载切片子网，向用户发送注册请求的响应消息，且注册请求响应消息中携带上述切片选择请求响应消息中携带的信息；用户在接收到注册请求响应消息后执行步骤8，基于响应消息中的接受的S-NSSAI(目标网络切片的S-NSSAI)发起后继的会话建立流程。
在一个具体的例子中，漫游策略的具体配置方法如下：增加漫游策略配置信息表，运营商根据具体需要配置漫游策略：包括但不限于以下策略：
漫游策略方案一：基于NSSF管理的切片实例和位置信息，设计漫游策略配置信息表，并配置具体漫游策略，如表1所示：
Figure PCTCN2020110492-appb-000001
表1
漫游策略方案二：基于用户SUPI(Subscribed User Permanent Identity，签约的用户永久标示)号段和AMF信息，设计漫游策略表，并配置具体漫游策略，如表2所示：
Figure PCTCN2020110492-appb-000002
表2
其中，切片实例标示为具体部署的切片实例标示，唯一标示切片实例；位置信息为该切片实例服务的位置信息，如ZC(Zone Code，区域编码)列表、RAC(Routing Area Code，路由区编码)列表、TAC(Track Area Code，跟踪区编码)列表等NRF信息；SUPI信息为服务该切片实例的SUPI号段信息；服务该切片实例的NRF标示或者地址信息；AMF信息为服务该切片实例的AMF标示或者地址信息；AMF SetID为服务该切片实例的AMF集标示信息；S-NSSAIs为服务该切片实例的S-NSSAI信息；映射的S-NSSAIs为用户漫游到本切片后映射的归属切片S-NSSAI。
基于上述漫游策略配置信息表，NSSF在接受到AMF发送的切片选择请求时，在上述漫游策略配置信息表中找到一组配置信息和切片选择请求中携带的用户信息匹配的配置信息，并根据该配置信息确定用户的目标网络切片，返回决策后的接受S-NSSAI信息、配置S-NSSAI、映射的S-NSSAI、NRF标示信息或切片实例标示信息等。
本实施例相对于现有技术而言，在多个网络切片共享网络切片选择功能网元NSSF的情况下，NSSF接收漫游用户的切片选择请求时根据预设的漫游策略和切片选择请求中的用户信息，确定用户切换的目标网络切片，通过预设的漫游策略使得共享NSSF能够为漫游用户合理地选择网络切片，有效地解决了用户在网络切片间漫游时网络切片的选择问题，是对标准协议的有效补充和完善。
本申请的第二实施例涉及一种网络切片的选择方法，应用于网络切片选择功能网元NSSF，所述NSSF被多个核心网的网络切片共享。所述方法包括：接收切片选择请求，所述切片选择请求用于请求为漫游的用户选择网络切片，所述切片选择请求中包括用户信息；根据所述用户信息，按照各项配置信息的优先级，在所述漫游策略中查找与所述用户信息匹配的一组配置信息；将所述查找到的一组配置信息所对应的网络切片，确定为所述目标网络切片；发送所述切片选择请求的响应消息，所述响应消息携带所述目标网络切片的标识信息。
本实施例中的一种网络切片的选择方法如流程图5所示。具体包括以下步骤：
步骤201：接收包括用户信息的切片选择请求；本步骤和实施例一种的步骤101类似，在此不作赘述；
步骤202：按配置信息优先级查找用户信息匹配的配置信息组；具体地说，所述用户信息包括所述用户当前所处的所述网络切片的单一网络切片选择辅助信息S-NSSAI，以及以下信息之一或其任意组合：所述用户的位置信息、所述用户的签约永久标示SUPI、所述用户拜访地默认的接入和移动管理功能网元AMF信息。每组所述配置信息包括所述对应的网络切片的单一网络切片选择辅助信息S-NSSAI，以及以下信息之一或其任意组合：所述对应的网络切片的位置信息、所述对应的网络切片的签约用户的永久标示SUPI和预设的接入和移动管理功能网元AMF信息。
具体地说，每组所述配置信息中的各项配置信息分别设有不同的优先级，根据各项所述配置信息的优先级，按从高到低的顺序，依次查找与所述用户信息匹配的配置信息组，每次查找完配置信息组，在已找到的配置信息组中进行下一优先级的查找。
步骤203：判断找到的与用户信息匹配的配置信息组数是否为1，如果是，则进入步骤204，如果否，进入步骤202；
步骤204：确定一组匹配的配置信息对应的网络切片为目标网络切片；
步骤205：发送切片选择请求的响应消息；本步骤和实施例一中的步骤103类似，在此不做赘述；
在一个具体的例子中，使用实施例一中的漫游策略方案二(基于用户SUPI号段和AMF信息，设计漫游策略表，并配置具体漫游策略)作为漫游策略，并为所述漫游策略配置信息表中的配置信息设置优先级，具体如下，讲用户SUPI号段设置为第一优先级，将AMF信息设置为第二优先级，将映射的S-NSSAI设置为第三优先级，漫游策略配置信息表如表3所示：
Figure PCTCN2020110492-appb-000003
表3
此时NSID-NJ-ZTE-eMBB-01的用户在漫游时需要进行切片选择，具体步骤如下：
用户经无线切片子网和承载切片子网发起注册请求，请求消息中携带请求的S-NSSAI(01000001)、用户的SUPI信息(4600321)以及用户拜访地默认的AMF信息(220.116.15.95)等信息。
拜访地默认AMF与归属地UDM/AUSF/UDR交互，完成用户的认证授权过程，获取用户签约的S-NSSAI(01000001)。
拜访地默认AMF发送切片选择请求消息到NSSF，请求消息中携带请求的S-NSSAI(01000001)、用户的SUPI信息(4600321)以及用户拜访地默认的AMF信息(220.116.15.95)等信息。
共享NSSF根据请求消息信息以及本地漫游策端略，确定目标网络切片：根据第一优先级的SUPI信息确定匹配的网络切片NSID-NJ-ZTE-eMBB-02和NSID-NJ-ZTE-eMBB-03，再根据第二优先级的AMF信息在已经匹配的网络切片中，进一步确定匹配的网络切片NSID-NJ-ZTE-eMBB-02和NSID-NJ-ZTE-eMBB-03，此时匹配的网络切片数量不为1，再根据第三优先级的映射的S-NSSAI，在已经匹配的网络切片中，进一步确定匹配的网络切片NSID-NJ-ZTE-eMBB-02(映射的S-NSSAI对应请求消息中携带的S-NSSAI),此时将切片实例标示为NSID-NJ-ZTE-eMBB-02的网络切片确定为目标网络切片。
共享NSSF返回切片选择响应消息到拜访地默认AMF，消息中携带上述目标网络切片的接受的S-NSSAI(01000002)、配置的S-NSSAI(如：01000002)、映射的S-NSSAI(如：01000001) 等信息。
拜访地默认AMF经无线切片子网和承载切片子网，向用户回应注册请求响应消息，消息中携带终端用户在拜访地使用的接受S-NSSAI(01000002)、配置的S-NSSAI(01000002)、映射的S-NSSAI(如：01000001)等信息。
用户基于接受的S-NSSAIs(01000002)发起后继的会话建立等流程。
本实施例相对于现有技术而言，在多个网络切片共享网络切片选择功能网元NSSF的情况下，NSSF接收漫游用户的切片选择请求，并根据切片选择请求中的用户信息，根据所述用户信息，按照各项配置信息的优先级，在所述漫游策略中查找与所述用户信息匹配的一组配置信息；将所述查找到的一组配置信息所对应的网络切片，确定为用户切换的目标网络切片，通过预设的漫游策略使得共享NSSF能够为漫游用户合理地选择网络切片，有效地解决了用户在网络切片间漫游时网络切片的选择问题，是对标准协议的有效补充和完善。
本申请第三实施例涉及一种网络切片的选择装置，所述选择装置被多个核心网的网络切片共享，所述选择装置包括：接收模块301，选择模块302和发送模块303，具体结构如图6所示：
接收模块301，用于接收切片选择请求，所述切片选择请求用于请求为漫游的用户选择网络切片，所述切片选择请求中包括用户信息；选择模块302，用于根据预设的漫游策略和所述用户信息确定目标网络切片；发送模块303，用于发送所述切片选择请求的响应消息，所述响应消息携带与所述目标网络切片的标识信息。
在一个具体的例子中，所述漫游策略包括多组配置信息，且每组所述配置信息对应一个所述网络切片；所述根据预设的漫游策略和所述用户信息确定目标网络切片，包括：根据所述用户信息，在所述漫游策略中查找与所述用户信息匹配的一组配置信息；将所述查找到的一组配置信息所对应的网络切片，确定为所述目标网络切片。
在一个具体的例子中，所述用户信息包括所述用户当前所处的所述网络切片的单一网络切片选择辅助信息S-NSSAI，以及以下信息之一或其任意组合：所述用户的位置信息、所述用户的签约永久标示SUPI、所述用户拜访地默认的接入和移动管理功能网元AMF信息。每组所述配置信息包括所述对应的网络切片的单一网络切片选择辅助信息S-NSSAI，以及以下信息之一或其任意组合：所述对应的网络切片的位置信息、所述对应的网络切片的签约用户的永久标示SUPI和预设的接入和移动管理功能网元AMF信息。
在一个具体的例子中，每组所述配置信息中的各项配置信息分别设有不同的优先级； 所述根据所述用户信息，在所述漫游策略中查找与所述用户信息匹配的一组配置信息，包括：根据各项所述配置信息的优先级，按从高到低的顺序，依次查找与所述用户信息匹配的配置信息直至找到一组所述配置信息中的各项配置信息都与所述用户信息匹配。
在一个具体的例子中，所述根据所述用户信息，在所述漫游策略中查找与所述用户信息匹配的一组配置信息，包括：若根据所述用户信息，在所述漫游策略中查找到与所述用户信息匹配的多组配置信息，则在所述查找到的多组配置信息中，随机选择一组配置信息；将所述随机选择的一组配置信息，作为与所述用户信息匹配的一组配置信息。
在一个具体的例子中，所述目标网络切片的标识信息包括所述目标网络切片的单一网络切片选择辅助信息S-NSSAI和映射的S-NSSAI。
不难发现，本实施例为与第一实施例相对应的装置实施例，本实施例可与第一实施例互相配合实施。第一实施例中提到的相关技术细节在本实施例中依然有效，为了减少重复，这里不再赘述。相应地，本实施例中提到的相关技术细节也可应用在第一实施例中。
值得一提的是，本实施例中所涉及到的各模块均为逻辑模块，在实际应用中，一个逻辑单元可以是一个物理单元，也可以是一个物理单元的一部分，还可以以多个物理单元的组合实现。此外，为了突出本申请的创新部分，本实施例中并没有将与解决本申请所提出的技术问题关系不太密切的单元引入，但这并不表明本实施例中不存在其它的单元。
本申请第四实施例涉及一种网络切片选择功能网元，如图7所示，该网络切片选择网元包括至少一个处理器401；以及，与至少一个处理器401通信连接的存储器402；以及，与网络切片选择功能网元通信连接的通信组件403，通信组件403在处理器401的控制下接收和发送数据；其中，存储器402存储有可被至少一个处理器401执行的指令，指令被至少一个处理器401执行以实现上述网络切片的选择方法实施例。
具体地，该电子设备包括：一个或多个处理器401以及存储器402，图6中以一个处理器401为例。处理器401、存储器402可以通过总线或者其他方式连接，图6中以通过总线连接为例。存储器402作为一种计算机可读存储介质，可用于存储计算机软件程序、计算机可执行程序以及模块。处理器401通过运行存储在存储器402中的计算机软件程序、指令以及模块，从而执行设备的各种功能应用以及数据处理，即实现上述网络切片的选择方法。
存储器402可以包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、 至少一个功能所需要的应用程序；存储数据区可存储选项列表等。此外，存储器402可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实施例中，存储器402可选包括相对于处理器401远程设置的存储器，这些远程存储器可以通过网络连接至外接设备。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
一个或者多个模块存储在存储器402中，当被一个或者多个处理器401执行时，执行上述任意方法实施例中的网络切片的选择方法。
上述产品可执行本申请实施例所提供的方法，具备执行方法相应的功能模块和有益效果，未在本实施例中详尽描述的技术细节，可参见本申请实施例所提供的方法。
其中，存储器和处理器采用总线方式连接，总线可以包括任意数量的互联的总线和桥，总线将一个或多个处理器和存储器的各种电路连接在一起。总线还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路连接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口在总线和收发机之间提供接口。收发机可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。经处理器处理的数据通过天线在无线介质上进行传输，进一步，天线还接收数据并将数据传送给处理器。
处理器负责管理总线和通常的处理，还可以提供各种功能，包括定时，外围接口，电压调节、电源管理以及其他控制功能。而存储器可以被用于存储处理器在执行操作时所使用的数据。
本申请第五实施例涉及一种网络切片选择的系统，如图8所示，包括：多个核心网的网络切片，以及网络切片选择功能网元，所述网络切片选择功能网元分别与多个核心网的网络切片连接，被各核心网的网络切片共享。
本实施例中的网络切片选择功能网元与第四实施例中的网络切片选择功能网元相同，在此不再赘述。
在本实施例中，在多个网络切片共享网络切片选择功能网元NSSF的情况下，NSSF接收漫游用户的切片选择请求时根据预设的漫游策略和切片选择请求中的用户信息，确定用户切换的目标网络切片，有效地解决了用户在网络切片间漫游时网络切片的选择问题，是对标准协议的有效补充和完善。
本申请第六实施例涉及一种计算机可读存储介质，存储有计算机程序。计算机程序被处理器执行时实现上述网络切片的选择方法实施例。
即，本领域技术人员可以理解，实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)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(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
本领域的普通技术人员可以理解，上述各实施例是实现本申请的具体实施例，而在实际应用中，可以在形式上和细节上对其作各种改变，而不偏离本申请的精神和范围。

Claims (10)

  1. 一种网络切片的选择方法，应用于网络切片选择功能网元NSSF，所述NSSF被多个核心网的网络切片共享，所述方法包括：
    接收切片选择请求，所述切片选择请求用于请求为漫游的用户选择网络切片，所述切片选择请求中包括用户信息；
    根据预设的漫游策略和所述用户信息确定目标网络切片；
    发送所述切片选择请求的响应消息，所述响应消息携带所述目标网络切片的标识信息。
  2. 根据权利要求1所述的网络切片的选择方法，其中，所述漫游策略包括多组配置信息，且每组所述配置信息对应一个所述网络切片；
    所述根据预设的漫游策略和所述用户信息确定目标网络切片，包括：
    根据所述用户信息，在所述漫游策略中查找与所述用户信息匹配的一组配置信息；
    将所述查找到的一组配置信息所对应的网络切片，确定为所述目标网络切片。
  3. 根据权利要求2所述的网络切片的选择方法，其中，
    所述用户信息包括所述用户当前所处的所述网络切片的单一网络切片选择辅助信息S-NSSAI，以及以下信息之一或其任意组合：所述用户的位置信息、所述用户的签约永久标示SUPI、所述用户拜访地默认的接入和移动管理功能网元AMF信息。
    每组所述配置信息包括所述对应的网络切片的单一网络切片选择辅助信息S-NSSAI，以及以下信息之一或其任意组合：所述对应的网络切片的位置信息、所述对应的网络切片的签约用户的永久标示SUPI和预设的接入和移动管理功能网元AMF信息。
  4. 根据权利要求2所述的网络切片的选择方法，其中，每组所述配置信息中的各项配置信息分别设有不同的优先级；
    所述根据所述用户信息，在所述漫游策略中查找与所述用户信息匹配的一组配置信息，包括：
    根据各项所述配置信息的优先级，按从高到低的顺序，依次查找与所述用户信息匹配的配置信息直至与所述用户信息匹配的所述配置信息组数为1。
  5. 根据权利要求2所述的网络切片的选择方法，其中，所述根据所述用户信息，在所述漫游策略中查找与所述用户信息匹配的一组配置信息，包括：
    若根据所述用户信息，在所述漫游策略中查找到与所述用户信息匹配的多组配置信息，则在所述查找到的多组配置信息中，随机选择一组配置信息；
    将所述随机选择的一组配置信息，作为与所述用户信息匹配的一组配置信息。
  6. 根据权利要求1所述的网络切片选择方法，其中，所述目标网络切片的标识信息包括所述目标网络切片的单一网络切片选择辅助信息S-NSSAI和映射的S-NSSAI。
  7. 一种网络切片的选择装置，所述选择装置被多个核心网的网络切片共享，所述选择装置包括：
    接收模块，用于接收切片选择请求，所述切片选择请求用于请求为漫游的用户选择网络切片，所述切片选择请求中包括用户信息；
    选择模块，用于根据预设的漫游策略和所述用户信息确定目标网络切片；
    发送模块，用于发送所述切片选择请求的响应消息，所述响应消息携带所述目标网络切片的标识信息。
  8. 一种网络切片选择功能网元，包括：
    至少一个处理器；
    以及，与所述至少一个处理器通信连接的存储器；
    其中，所述存储器存储有可被所述至少一个处理器执行的指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器能够执行如权利要求1至6中任一项所述的网络切片的选择方法。
  9. 一种网络切片选择系统，包括：多个核心网的网络切片，以及如权利要求8所述的网络切片选择功能网元，所述网络切片选择功能网元分别与多个核心网的网络切片连接。
  10. 一种计算机可读存储介质，存储有计算机程序，所述计算机程序被处理器执行时实现权利要求1至6中任一项所述的网络切片的选择方法。
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