WO2018006784A1 - 一种网络切片选择方法、设备及系统 - Google Patents

一种网络切片选择方法、设备及系统 Download PDF

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Publication number
WO2018006784A1
WO2018006784A1 PCT/CN2017/091580 CN2017091580W WO2018006784A1 WO 2018006784 A1 WO2018006784 A1 WO 2018006784A1 CN 2017091580 W CN2017091580 W CN 2017091580W WO 2018006784 A1 WO2018006784 A1 WO 2018006784A1
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Prior art keywords
network
network slice
slice
slice selection
function entity
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PCT/CN2017/091580
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English (en)
French (fr)
Inventor
孙晓文
陈炜
陆璐
孙滔
Original Assignee
中国移动通信有限公司研究院
中国移动通信集团公司
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Application filed by 中国移动通信有限公司研究院, 中国移动通信集团公司 filed Critical 中国移动通信有限公司研究院
Priority to JP2019500230A priority Critical patent/JP2019520763A/ja
Priority to EP17823596.6A priority patent/EP3481017B1/en
Priority to US16/315,596 priority patent/US20190174321A1/en
Publication of WO2018006784A1 publication Critical patent/WO2018006784A1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • 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
    • H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data
    • H04W8/205—Transfer to or from user equipment or user record carrier

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a network slice selection method, device, and system.
  • the mobile network needs to meet more diverse service scenarios, such as low-power large connections, hot-spot high-capacity, continuous wide-area coverage, and low latency and high reliability.
  • the current mobile network is based on a set of logical architecture to serve a variety of application scenarios.
  • the Mobility Management Entity (MME) has certain intelligence, and can perform gateway selection based on the user's subscription and service identification.
  • the base station can select the MME based on the weight of the MME load.
  • MME Mobility Management Entity
  • this solution is difficult to adapt to multiple service scenarios in the future network (such as the Internet of Things, low latency, etc.), and its architecture is single, inflexible, and difficult to adapt to diverse network requirements at a lower cost. May affect the operation of other businesses.
  • the access point name (Access Point Name (APN)) can also be used for gateway (such as General Packet Radio Service (GPRS) Gateway Support Node GGSN, Public Data Network PDN Gateway (PGW)), access point name (APN) can be used as a service identifier.
  • gateway such as General Packet Radio Service (GPRS) Gateway Support Node GGSN, Public Data Network PDN Gateway (PGW)
  • APN access point name
  • GPRS General Packet Radio Service
  • GGSN General Packet Radio Service Gateway Support Node
  • PGW Public Data Network PDN Gateway
  • APN access point name
  • the management of the network connection based on the APN still has the problem of not being able to construct an end-to-end service-oriented network, and it is impossible to effectively isolate the network element device, and the service cannot be refined and flexibly configured by the APN granularity.
  • Network slicing is a technique proposed to solve the above problems. Through network slicing, the related physical network resources are divided into logically different networks, and services similar to proprietary networks for different service scenarios are provided.
  • the present disclosure provides a network slice selection method, device, and system, which solves the technical problem that the network slice cannot be flexibly selected in the related art.
  • a network slice selection method includes: a slice selection control function entity acquiring one or more of a slice selection policy, a user subscription information, a network slice selection assistance parameter, and a user context; the slice selection control function entity according to a slice selection policy, user subscription information, Determining, by one or more of the network slice selection assistance parameter and the user context, network slice selection information, and transmitting the determined network slice selection information to a slice routing function entity or an access network side device to route the slice
  • the functional entity or the access network side device performs signaling or data routing.
  • the manner in which the slice selection control function entity acquires a network slice selection assistance parameter and/or a user context is: the slice selection control function entity receives an attachment request sent by a slice routing function entity or an access network, where the attachment The request carries a network slice selection assistance parameter and/or a user context; the slice selection control function entity obtains a slice selection policy by: the slice selection control function entity is from a fifth generation mobile communication network 5G policy network function entity Obtaining a slice selection policy; the manner in which the slice selection control function entity acquires user subscription information is: the slice selection control function entity acquires user subscription information from a subscription database.
  • the slice routing function entity is located in the access network, or is located in the core network, or is located between the core network and the access network, or is merged with a slice selection control function entity, where the slice selection control function entity is located in the access network.
  • the network is either located in the core network or a network functional entity independent of the access network and the core network.
  • the network slice selection assistance parameter is one or more of a network slice identifier, a service type, a network slice description symbol, a terminal usage type, and a tenant identifier.
  • the network slice identifier includes a network slice type identifier and/or a network slice instance identifier.
  • the network slice selection information is a control plane function identifier of the network slice accessed by the user or a set identifier of the control plane function.
  • control surface function identifier of the network slice or the set identifier of the control plane function corresponds to the network slice identifier.
  • a network slice selection method includes: a slice routing function entity or an access network side device receiving network slice selection information sent by a slice selection control function entity, where the network slice selection information is selected by the slice selection control function entity according to a slice selection policy, user subscription information, The network slice selects one or more determinations in the assistance parameter and the user context; the slice routing function entity or the access network side device performs signaling or data routing according to the network slice selection information.
  • the method further includes: the slice routing function entity or the access network side device sends the network slice identifier to the terminal, so that the terminal updates the stored network slice identifier according to the received network slice identifier.
  • the network slice selection assistance parameter and/or user context is obtained by the slice selection control function entity from the received attachment request; the slice selection policy is determined by the slice selection control function entity Obtained in the fifth generation mobile communication 5G policy network function entity; the user subscription information is obtained by the slice selection control function entity from the subscription database.
  • the slice routing function entity is located in the access network, or is located in the core network, or is located between the core network and the access network, or is merged with a slice selection control function entity, where the slice selection control function entity is located in the access network.
  • the network is either located in the core network or a network functional entity independent of the access network and the core network.
  • the network slice selection assistance parameter is one or more of a network slice identifier, a service type and a network slice description symbol, a terminal usage type, and a tenant identifier.
  • the network slice identifier includes a network slice type identifier and/or a network slice instance identifier.
  • the network slice selection information is a control plane function identifier of the network slice accessed by the user or a set identifier of the control plane function.
  • the set identifier of the control plane function identifier or the control plane function of the network slice corresponds to the network slice identifier of the network slice.
  • the method further includes: the slice routing function entity or the access network side device obtaining a network slice selection correspondence table from the slice selection control function entity, where the network slice selection correspondence table records a network Slice selection assistance parameters or network slice identification and network slice selection Correspondence of information.
  • the method further includes: the slice routing function entity or the access network side device receives an attach request, where the attach request carries a network slice selection assistance parameter; the slice routing function entity or the access network side The device determines network slice selection information according to the network slice selection correspondence table and the network slice selection assistance parameter; the slice routing function entity or the access network side device performs signaling or data routing according to the network slice selection information. .
  • the method further includes: the slice routing function entity or the access network side device obtaining, from the slice selection control function entity, a correspondence between a new network slice selection assistance parameter and network slice selection information; The routing function entity or the access network side device updates the network slice selection correspondence table by using the correspondence between the new network slice selection assistance parameter and the network slice selection information.
  • the method further includes: if the slice routing function entity or the access network side device receives the information of the attachment error, the slice routing function entity or the access network side device re-selects the network slice selection assistance. The parameters are sent to the slice selection control function entity to obtain the correct network slice selection information.
  • the slice routing function entity or the access network side device has the capability of identifying whether the terminal supports network slice.
  • the slice routing function entity or the access network side device forwards the signaling to the slice.
  • Selecting a control function entity so that the slice selection control function entity informs the terminal to access a network slice or informs the control plane function of the accessed network slice; if the terminal supports network slice, the message carried by the terminal There is a field of the network slice selection assistance parameter, where the field is null NULL or carries a description of the network slice selection assistance parameter.
  • the method further includes: the slice routing function entity or the access network side device routes the user to the corresponding network slice, and performs the authentication and authorization of the user access network slice by the selected network slice control plane function. Process.
  • the authentication and authorization process of the user access network slice is performed by the selected network slice control plane function, including: when the control function of the network slice initiates an authentication request, the subscription database feeds back the network slice control plane function.
  • Signing information of users under the land mobile network PLMN The function of the network slice control plane determines whether the user can access the selected control plane network function according to the subscription information, and completes the authentication and authorization of the user access network slice.
  • a slice selection control function entity includes: a first receiving module, configured to acquire one or more of a slice selection policy, a user subscription information, a network slice selection assistance parameter, and a user context; and a first determining module, configured to select a policy according to the slice Determining network slice selection information by one or more of user subscription information, network slice selection assistance parameters, and user context, and transmitting the determined network slice selection information to the slice routing function entity, so that the slice The routing function entity performs signaling or data routing.
  • the first receiving module is configured to receive an attach request sent by a slice routing function entity or an access network, where the attach request carries a network slice selection assistance parameter and/or a user context;
  • the receiving module is configured to obtain a slice selection policy from a fifth generation mobile communication 5G policy network function entity, where the first receiving module is specifically configured to obtain user subscription information from the subscription database.
  • the slice routing function entity is located in the access network, or located in the core network, or between the core network and the access network, or merged with the slice selection control function entity, where the slice selection control function entity is located in the access network or Located in the core network or a network functional entity independent of the access network and the core network.
  • the network slice selection assistance parameter is one or more of a network slice identifier, a service type, a network slice description symbol, a terminal usage type, and a tenant identifier.
  • the network slice identifier includes a network slice type identifier and/or a network slice instance identifier.
  • the network slice selection information is a control plane function identifier of the network slice accessed by the user or a set identifier of the control plane function.
  • a network slice selection device includes: a second receiving module, configured to receive network slice selection information sent by a slice selection control function entity, where the network slice selection information is selected by the slice selection control function entity according to a slice selection policy, user subscription information, and network slice selection. Assisting one or more determinations in the parameter and the user context; the first processing module is configured to perform signaling or data routing according to the network slice selection information.
  • the device further includes: a first sending module, configured to send the network slice identifier to And the terminal, so that the terminal updates the stored network slice identifier according to the received network slice identifier.
  • a first sending module configured to send the network slice identifier to And the terminal, so that the terminal updates the stored network slice identifier according to the received network slice identifier.
  • the network slice selection assistance parameter and/or user context is obtained by the slice selection control function entity from a received attachment request; the slice selection policy is controlled by the slice selection function entity from 5G Obtained in the policy network function entity; the user subscription information is obtained by the slice selection control function entity from the subscription database.
  • the device is a slice routing function entity, where the slice routing function entity is located in the access network, or located in the core network, or between the core network and the access network, or merged with the slice selection control function entity.
  • the slice selection control function entity is located in the access network or in the core network or a network functional entity independent of the access network and the core network.
  • the network slice selection assistance parameter is one or more of a network slice identifier, a service type, a network slice description symbol, a terminal usage type, and a tenant identifier.
  • the network slice identifier includes a network slice type identifier and/or a network slice instance identifier.
  • the network slice selection information is a control plane function identifier of the network slice accessed by the user or a set identifier of the control plane function.
  • the set identifier of the control plane function identifier or the control plane function of the network slice corresponds to the network slice identifier of the network slice.
  • the device further includes: a storage module, configured to obtain, from the slice selection control function entity, a network slice selection correspondence table, where the network slice selection correspondence table records a network slice selection assistance parameter or a network slice The correspondence between the identifier and the network slice selection information.
  • a storage module configured to obtain, from the slice selection control function entity, a network slice selection correspondence table, where the network slice selection correspondence table records a network slice selection assistance parameter or a network slice The correspondence between the identifier and the network slice selection information.
  • the device further includes: a third receiving module, configured to receive an attach request, where the attach request carries a network slice selection assistance parameter; and a second determining module, configured to select a correspondence table and a location according to the network slice
  • the network slice selection assistance parameter is used to determine network slice selection information
  • the second processing module is configured to perform signaling or data routing according to the network slice selection information.
  • the device further includes: a fourth receiving module, configured to obtain, from the slice selection control function entity, a correspondence between a new network slice selection assistance parameter and network slice selection information; and an update module, configured to utilize the new The corresponding relationship between the network slice selection assistance parameter and the network slice selection information updates the network slice selection correspondence table.
  • a fourth receiving module configured to obtain, from the slice selection control function entity, a correspondence between a new network slice selection assistance parameter and network slice selection information
  • an update module configured to utilize the new The corresponding relationship between the network slice selection assistance parameter and the network slice selection information updates the network slice selection correspondence table.
  • the device further includes: a retransmission module, configured to receive an attach error message Re-send the network slice selection assistance parameter to the slice selection control function entity to obtain the correct slice selection result.
  • a retransmission module configured to receive an attach error message Re-send the network slice selection assistance parameter to the slice selection control function entity to obtain the correct slice selection result.
  • a network slice selection method is provided.
  • the method is applicable to a roaming scenario and includes: acquiring a network slice identifier, where the network slice identifier includes a network slice type identifier and a network slice instance identifier; and identifying, according to the network slice type identifier, a public land mobile network PLMN; according to the network The slice instance identifies the user accessing the network slice corresponding to the identifier of the network slice instance.
  • PLMN public land mobile network
  • a network slice selection device includes: an obtaining module, configured to acquire a network slice identifier, where the network slice identifier includes a network slice type identifier and a network slice instance identifier, and a selection module, configured to identify, according to the network slice type identifier, a public land mobile network PLMN corresponding to the identifier
  • the access module is configured to access the network slice corresponding to the identifier of the network slice instance according to the network slice instance identifier.
  • the selecting module is further configured to determine an operator and a network type according to the network slice type identifier; and select a corresponding PLMN according to the determined carrier and network type.
  • a network slice selection method includes: if there is no field of the network slice selection assistance parameter in the message carried by the terminal, the slice routing function entity or the access network side device sends the message carried by the terminal to the slice selection control function entity, so that the slice selection is performed.
  • the control function entity selects a suitable network slice for the terminal and sends it to the slice routing function entity or the access network side device; the slice routing function entity or the access network side device sends the slice routing function to the terminal.
  • the network slice identifier of the network slice selected by the entity or the access network side device, and the connection request is re-initiated by the terminal.
  • a network slice selection device includes: a second sending module, configured to send a message carried by the terminal to the slice selection control function entity, so that the slice selection control function entity is used if the field of the network slice selection assistance parameter does not exist in the message carried by the terminal Selecting a suitable network slice for the terminal and sending it to the slice routing function entity or the access network side device; and a third processing module, configured to send the slice routing function to the terminal The network slice identifier of the network slice selected by the entity or the access network side device, and the connection request is re-initiated by the terminal.
  • a network slice selection method includes: an end-to-end slice management and orchestration function entity transmitting a control instruction, the control instruction being any one of an instruction to add a new network slice, an instruction to delete a network slice, and an instruction to update a network slice identifier;
  • the end-to-end slice management and orchestration function entity sends an update correspondence message to the slice selection control function entity, so that the slice selection control function entity updates the network slice identifier and the control plane function identifier of the network slice or the control plane function of the network slice
  • the correspondence of the collection identifiers is provided.
  • a network slice selection device includes: a third sending module, configured to send a control instruction, where the control instruction is an instruction to add a new network slice, an instruction to delete a network slice, and an instruction to update a network slice identifier; the fourth sending module And sending an update correspondence message to the slice selection control function entity, so that the slice selection control function entity updates the correspondence between the network slice identifier and the control plane function identifier of the network slice or the set identifier of the control plane function of the network slice.
  • the network slice when network slice selection is required, the network slice can be flexibly selected based on the network slice identifier or the service type, and the port of the network slice is not required to be specifically configured.
  • different network service functions correspond to different network slices, which avoids mutual influence between various services, and the network stability is higher.
  • the RAN side may store the network slice selection correspondence table, and directly check the network slice selection correspondence table to obtain the network slice selection information, so as to prevent the UE from repeatedly accessing the slice selection function to obtain the network slice selection information when accessing the network slice multiple times.
  • FIG. 1 is a schematic diagram of a network slicing architecture in accordance with an exemplary application scenario of the present disclosure
  • FIG. 2 is a flowchart of a network slice selection method according to an embodiment of the present disclosure
  • FIG. 3 is a flowchart of a network slice selection method according to an embodiment of the present disclosure.
  • FIG. 4 is a flow chart of selecting and attaching network slices according to an embodiment of the present disclosure
  • FIG. 5 is a flowchart of adding a network slice according to an embodiment of the present disclosure
  • FIG. 6 is a flowchart of deleting a network slice according to an embodiment of the present disclosure.
  • FIG. 7 is a flow chart of updating a network slice according to an embodiment of the present disclosure.
  • FIG. 8 is a flowchart of updating a network slice according to an embodiment of the present disclosure.
  • Figure 9 is a block diagram of a slice selection control function entity of an embodiment of the present disclosure.
  • FIG. 10 is a block diagram of a network slice selection device according to an embodiment of the present disclosure.
  • FIG. 11 is a flowchart of a network slice selection method according to an embodiment of the present disclosure.
  • Figure 12 is a block diagram of a network slice selection device in accordance with an embodiment of the present disclosure.
  • embodiments of the present disclosure can be implemented as a system, apparatus, device, method, or computer program product.
  • embodiments of the present disclosure may be embodied in the form of full hardware, complete software (including firmware, resident software, microcode, etc.) or a combination of hardware and software.
  • FIG. 1 is a schematic diagram of a network slicing architecture of an exemplary application scenario of the present disclosure.
  • the selection of network slices refers to a method of distinguishing traffic of different scenarios and directing traffic of different scenarios to different network slices.
  • Network slicing is an end-to-end logical mobile network that includes the functions of an access network and a core network.
  • the network slice can also include only the core network.
  • the selection of network slices includes slice selection control function entities and routing functions.
  • the routing function may be located on the radio access network (RAN) side, and is responsible for signaling and data transmission related to network slicing; the Slice Select Control Function (SSCF) may exist on the RAN side or may exist in the core.
  • the network side or it can also be a network function independent of the RAN and the core network.
  • the slice selection control function entity may determine network slice selection information (or may also be referred to as selected network slice information) according to one or more of the following information, and feed back network slice selection information to the RAN to enable the RAN to execute the message. Order or data routing. It should be noted that the foregoing network slice selection information is a selection result made by the slice selection control function entity, and the selected network is embodied. Slice control surface function identification or collection identifier for control plane functions.
  • One or more of the above information may be (1) network slice selection assistance parameters, (2) user subscription information, (3) user context (eg, cell identity, etc.), and (4) slice selection policy.
  • the network slice selection assistance parameter may be obtained from the RAN side, for example, network slice identifier, service type, other slice selection auxiliary parameters, network slice description symbol, tenant identification, terminal usage type (UE USAGE) TYPE) and so on.
  • the network slice selection assistance parameter is carried in the attach request.
  • the above network slice identifier may include two parts, and one part is a network slice type identifier (for example, an enhanced mobile broadband (eMBB) slice, an Internet of Things (IoT)). Part of is the network slice instance identifier (a type of network slice may have multiple entities, for example, an eMBB slice may have multiple instantiated entities).
  • a network slice type identifier for example, an enhanced mobile broadband (eMBB) slice, an Internet of Things (IoT)
  • IoT Internet of Things
  • the network slice identifier includes a network slice type identifier and/or a network slice instance identifier.
  • the core network may construct a fully qualified domain name/full name domain name based on the network slice identifier (Fully Qualified Domain) Name (FQDN)) Find the corresponding network slice or the corresponding network slice control plane function.
  • the above slice type can be used to determine the user's carrier (such as China Mobile, China Unicom or China Telecom) and determine the network type (such as the fourth generation mobile communication (4G), third generation when the user roams. Mobile communication (3G), etc.).
  • the visited operator can access the network slice corresponding to the network slice instance identifier (instance id) according to the network slice instance identifier. .
  • the user context may be separately selected as a type of selection information, or may be obtained from the RAN side in the slice selection assistance parameter.
  • Slice selection strategy for example, a slice selection policy based on a user or a service type or the like. It can be obtained from the fifth generation mobile communication (5G) network policy function (corresponding to the 5G Policy network function in the figure), or it can also be the SSCF configuration selection policy.
  • the slice selection policy may include: a high-priority client may access the network slice in the case of network congestion, and a low-priority client may not access, etc., and is not limited thereto.
  • the user When the network slice is selected for the first time, the user will carry the network slice selection assistance parameters (such as the network).
  • the slice identifier Slice-ID or service type, etc. is passed to the RAN, and the RAN accesses an independent slice selection control function entity to acquire network slice selection information, and performs signaling or data routing according to the network slice selection information.
  • the network slice selection information may be a control plane function ID of the network slice accessed by the user or a set ID of the control plane function (also referred to as a control plane function Group-ID), which may be understood as an entry address of the network slice.
  • the control plane function of the network slice may be a network function in the network slice, or may be a set of network functions, so the network slice selection information returned after the selection by the slice selection control function entity may be a control plane function ID, or may Is the collection ID of a type of control plane function.
  • a network slice selection method will be described below with reference to FIG. 2 in conjunction with the network architecture in the application scenario of FIG. 1. It should be noted that the above application scenarios are only for the purpose of facilitating understanding of the spirit and principle of the present disclosure, and embodiments of the present disclosure are not limited in this respect. Rather, embodiments of the present disclosure may be applied to any scenario that is applicable.
  • FIG. 2 schematically illustrates a flow chart of a network slice selection method in accordance with an embodiment of the present disclosure.
  • the network slice selection method shown in FIG. 2 includes step 201 and step 202.
  • Step 201 The slice selection control function entity acquires one or more of a slice selection policy, a user subscription information, a network slice selection assistance parameter, and a user context.
  • the slice selection control function entity receives an attach request sent by a slice routing function entity or an access network, where the attach request carries a network slice selection assistance parameter and/or a user context; the slice selection control function entity Obtaining a slice selection policy from a 5G policy network function entity; the slice selection control function entity acquires user subscription information from a subscription database (DATA).
  • DATA subscription database
  • the user subscription information refers to the user subscription data obtained from the subscription database, and the subscription data may include: a network slice type, a network slice identifier, or a service type that the user subscribes to/subscribes, and the description is not limited in this embodiment.
  • the specific content of the user's subscription data is not limited in this embodiment.
  • the network slice selection assistance parameter may be one or more of a Slice Identifier (Slice-ID), a service type, a network slice description symbol, a tenant identifier, and a terminal usage type.
  • a Slice Identifier Slice-ID
  • the above types of services are, for example, Internet of Things services, high bandwidth, low latency services, and the like.
  • the user context may be a cell identifier or the like, and is of course not limited thereto.
  • the above network slice identifier may include two parts. Part of it is network slice type identification (such as identification enhanced mobile broadband (eMBB) slice, Internet of Things (IoT) cut Part) is a network slice instance identifier (a type of network slice may have multiple entities, for example, an eMBB slice may have multiple instantiated entities).
  • network slice type identification such as identification enhanced mobile broadband (eMBB) slice, Internet of Things (IoT) cut Part
  • IoT Internet of Things
  • the network slice identifier includes a network slice type identifier and/or a network slice instance identifier.
  • the core network may construct a fully qualified domain name (FQDN) based on the network slice identifier to find a corresponding network slice or a corresponding network slice control plane function.
  • the slice type identifier can be used to determine the user's carrier (such as China Mobile, China Unicom or China Telecom) and determine the network type (for example, 4G, 3G, etc.) when the user roams, and then identify the identifier according to the slice type.
  • PLMN Public Land Mobile Network
  • the visited operator can access the network slice corresponding to the network slice instance identifier (instance id) according to the network slice instance identifier.
  • the foregoing routing function may be located on the RAN (Radio Access Network) side, or located in the core network, or between the core network and the access network, or merged with the slice selection control function entity, and is responsible for signaling and data transmission related to network slicing.
  • the above-mentioned slice selection control function entity may exist on the RAN side, may exist in the core network, or may be a network function independent of the RAN and the core network.
  • Step 202 The slice selection control function entity determines network slice selection information according to one or more of a slice selection policy, user subscription information, a network slice selection assistance parameter, and a user context, and sends the determined network slice selection information to the slice route.
  • a functional entity to cause the slice routing function entity to perform signaling or data routing.
  • the slice selection control function entity determines the network slice selection information according to the slice selection policy; or the slice selection control function entity determines the network slice selection information according to the user subscription information; or the slice selection control function entity determines the network slice selection information according to the network slice selection assistance parameter Or the slice selection control function entity determines the network slice selection information according to the user context; or the slice selection control function entity determines the network slice selection information according to the slice selection policy, the user subscription information, the network slice selection assistance parameter, and the user context.
  • the slice selection control function entity determines the network slice selection information according to the slice selection policy, the user subscription information, the network slice selection assistance parameter, and the user context.
  • the above-mentioned slice selection policy refers to a slice selection policy based on a user or a service type, and may be obtained from a 5G network policy function (corresponding to the 5G Policy network function in the figure), or may be a handover selection policy configured for the SSCF, and is not limited to this.
  • the above network slice selection information is a selection result made by the slice selection control function entity, and the network is cut.
  • the slice selection information may be a control plane function identifier (control plane function ID) of the network slice accessed by the user or a set identifier (control plane function Group-ID) of the control plane function.
  • the set identifier of the control plane function identifier or the control plane function of the network slice corresponds to the network slice identifier of the network slice. That is, the set identifier of the control plane function identifier or the control plane function corresponding to the network slice may be searched according to the network slice identifier.
  • the slice selection control function entity determines network slice selection information according to one or more of a slice selection policy, user subscription information, a network slice selection assistance parameter, and a user context, thereby
  • the implementation can flexibly select network slices based on the network slice identifier, the slice selection policy, the cell identifier, or the service type, and does not need to specifically configure the port of the network slice, and different network services can correspond to different network slices, thereby avoiding various The interaction between services and the stability of the network is higher. There is no signaling interaction between the slice selection control function entity and the network slice, which reduces the number of external interfaces of the network slice.
  • a network slice selection method will be described below with reference to FIG. 3 in conjunction with the network architecture in the application scenario of FIG. 1. It should be noted that the above application scenarios are only for the purpose of facilitating understanding of the spirit and principle of the present disclosure, and embodiments of the present disclosure are not limited in this respect. Rather, embodiments of the present disclosure may be applied to any scenario that is applicable.
  • FIG. 3 schematically illustrates a flow chart of a network slice selection method in accordance with an embodiment of the present disclosure.
  • the method shown in FIG. 3 includes steps 301 and 302.
  • Step 301 The slice routing function entity or the access network side device receives the network slice selection information sent by the slice selection control function entity, where the network slice selection information is assisted by the slice selection control function entity slice selection policy, the user subscription information, and the network slice selection assistance. One or more determinations in the parameters and user context.
  • the slice selection control function entity determines the network slice selection information according to the slice selection policy; or the slice selection control function entity determines the network slice selection information according to the user subscription information; or the slice selection control function entity determines the network slice selection information according to the network slice selection assistance parameter Or the slice selection control function entity determines the network slice selection information according to the user context; or the slice selection control function entity determines the network slice selection information according to the slice selection policy, the user subscription information, the network slice selection assistance parameter, and the user context.
  • the slice selection control function entity determines the network slice selection information according to the slice selection policy, the user subscription information, the network slice selection assistance parameter, and the user context.
  • the above network slice selection assistance parameter may be obtained from an attach request from the RAN, of course Not limited to this.
  • the above user context can be obtained from an attach request from the RAN, and is of course not limited thereto.
  • the user subscription information refers to the user subscription data obtained from the subscription database, and the subscription data may include: a network slice type, a network slice identifier, or a service type that the user subscribes/signs. It should be noted that the specific content of the user subscription data is not limited in this embodiment.
  • the above-mentioned slice selection policy may refer to a slice selection policy based on a user or a service type, and may be obtained from a 5G network policy function (corresponding to the 5G Policy network function in the figure), or may be a switch selection policy configured for the SSCF, and of course not Limited to this.
  • the network slice selection assistance parameter is any one of a Slice Identifier (Slice-ID), a service type, a network slice description symbol, and a tenant identifier.
  • the above types of services are, for example, Internet of Things services, high bandwidth, low latency services, and the like.
  • the above user context may be a cell identifier or the like.
  • the network slice identifier may include two parts, one part is a network slice type identifier (for example, an enhanced enhanced mobile broadband (eMBB) slice, an Internet of Things (IoT) slice), and a part is a network slice instance identifier (a type of network).
  • a slice may have multiple entities, for example, an eMBB slice may have multiple instantiated entities).
  • the network slice identifier includes a network slice type identifier for determining an operator and a network type, and a network slice instance identifier for determining a specific network slice.
  • the core network may construct a fully qualified domain name (FQDN) based on the network slice identifier to find a corresponding network slice or a corresponding network slice control plane function, and the above slice type identifier (slice type) It can be used to determine the user's carrier (such as China Mobile, China Unicom or China Telecom) and determine the network type (such as 4G, 3G, etc.) when the user roams, and then select the corresponding public land mobile network according to the slice type identifier (Public) After the Land Mobile Network (PLMN), the visited operator can access the network slice corresponding to the network slice instance identifier (instance id) according to the network slice instance identifier.
  • FQDN fully qualified domain name
  • the foregoing routing function may be located in the RAN (Radio Access Network), or located in the core network, or located between the core network and the access network, or combined with the slice selection control function entity, responsible for signaling and data transmission related to the network slice;
  • the above slice selection control function entity may exist in the RAN, may also exist in the core network, or may be a network function independent of the RAN and the core network.
  • the above network slice selection information is a selection result made by a slice selection control function entity, and the above network
  • the network slice selection information may be a set identifier of a control plane function identifier or a control plane function corresponding to a network slice corresponding to a service requirement accessed by the user.
  • the set identifier of the control plane function identifier or the control plane function of the network slice corresponds to the network slice identifier of the network slice. That is, the set identifier of the control plane function identifier or the control plane function corresponding to the network slice may be searched according to the network slice identifier.
  • Step 302 The slice routing function entity or the access network side device performs signaling or data routing according to the network slice selection information.
  • the method further includes: the slice routing function entity or the access network side device obtains a network slice selection correspondence table from the slice selection control function entity, where the network slice selection corresponds to The relationship between the network slice selection assistance parameter or the network slice identifier and the network slice selection information is recorded in the relationship table.
  • the user slice when the user accesses the network slice again, the user slice (UE) may be directly guided to the network slice entry point corresponding to the network slice selection assistance parameter according to the network slice selection correspondence table, without re-accessing.
  • the slice selection control function entity acquires the correspondence.
  • the method further includes: the slice routing function entity or the access network side device receives an attach request, where the attach request carries a network slice selection assistance parameter; the slice routing function The entity determines network slice selection information according to the network slice selection correspondence table and the network slice selection assistance parameter, and the slice routing function entity performs signaling or data routing according to the network slice selection information.
  • the fault tolerance mechanism of the network slice selection allows the RAN to access the slice selection control function entity again to obtain the correct one.
  • the slice selection information is selected, the correct network slice is selected, and the network slice selection correspondence table on the RAN side is updated.
  • the method further includes: the slice routing function entity or the access network side device obtaining a new network slice selection assistance parameter and network slice selection information from the slice selection control function entity. Corresponding relationship; the slice routing function entity or the access network side device updates the network slice selection correspondence table by using a correspondence between the new network slice selection assistance parameter and the network slice selection information.
  • the foregoing correspondence needs to be updated in the following cases: the network slice selection correspondence table configured on the RAN side expires or the UE subscription/subscription relationship changes, etc. Errors, etc., of course, are not limited to this.
  • the method further includes: if the slice routing function entity or the access network side device receives the information of the attachment error, the slice routing function entity re-selects the network slice selection assistance parameter. Send to the slice selection control function entity to obtain the correct network slice selection result.
  • the slice selection control function entity determines network slice selection information according to one or more of a slice selection policy, user subscription information, a network slice selection assistance parameter, and a user context, thereby
  • the implementation can select a network slice based on the network slice identifier, the slice selection policy, the cell identifier, or the service type, and does not need to specifically configure the port of the network slice, and different network service functions correspond to different network slices, thereby avoiding various The interaction between services and the stability of the network is higher. There is no signaling interaction between the slice selection control function entity and the network slice, which reduces the number of external interfaces of the network slice.
  • the RAN side or the slice routing function entity may store the network slice selection correspondence table, and directly check the network slice selection correspondence table to obtain the network slice selection information, so as to prevent the UE from repeatedly accessing the slice selection function to obtain the network when accessing the network slice multiple times. Slice selection information.
  • FIG. 4 specifically includes steps 401 to 409.
  • Step 401 The user terminal (UE) sends an attach request to the radio access network (RAN).
  • RAN radio access network
  • the UE sends the network slice selection assistance parameter to the base station in the RAN, where the network slice selection assistance parameter includes but is not limited to a network slice identifier (Slice-ID), a service type, and the like.
  • the network slice selection assistance parameter includes but is not limited to a network slice identifier (Slice-ID), a service type, and the like.
  • the UE initiates an attach request to the RAN side, and includes information such as an Attach Request Message and a Radio Resource Control (RRC) parameter.
  • the RRC parameters include network slice selection assistance parameters, such as Slice-ID information, service type, and the like.
  • the network slice identifier may include two parts, one part is a network slice type identifier (for example, an enhanced enhanced mobile broadband (eMBB) slice, an Internet of Things (IoT) slice), and a part is a network slice instance identifier (a type of network).
  • a slice may have multiple entities, for example, an eMBB slice may have multiple instantiated entities).
  • the network slice identifier includes a network slice type identifier and Network slice instance ID.
  • the core network may construct a fully qualified domain name (FQDN) based on the network slice identifier to find a corresponding network slice or a corresponding network slice control plane function.
  • the above slice type can be used to determine the user's carrier (such as China Mobile, China Unicom or China Telecom) and determine the network type (such as 4G, 3G, etc.) when the user roams, and then select according to the slice type identifier.
  • PLMN Public Land Mobile Network
  • the visited operator can access the network slice corresponding to the network slice instance identifier (instance id) according to the network slice instance identifier.
  • Step 402 The RAN sends an attach request to a slice selection control function entity (or a slice selection control function entity).
  • the RAN side maintains a correspondence between a network slice selection assistance parameter (for example, a Slice-ID, a service type, and the like) carried by the UE and a corresponding network slice control plane function (for example, a corresponding network slice control network element).
  • the RAN may forward the attach request carried by the UE to the slice selection control function entity, and the slice selection control function entity acquires the network slice selection information.
  • the network slice selection information includes, but is not limited to, a network slice control plane function ID corresponding to the network slice selection assistance parameter carried by the UE or an ID of the network slice control plane function set (or may also be referred to as a network slice control plane function Group-ID) .
  • the RAN may also obtain the network slice selection information by directly searching the table according to the network slice selection correspondence table maintained by the RAN.
  • the slice selection information includes but is not limited to: a network slice control plane function ID or a network slice control plane corresponding to the selected network slice. The ID of the feature collection.
  • the network slice selection correspondence table records the correspondence between the network slice selection assistance parameter or the network slice identifier and the network slice selection information.
  • the network slice selection information is a selection result made by the slice selection control function entity, and the network slice selection information may be a control surface function identifier (control plane function ID) of the corresponding network slice or a set identifier of the control plane function (control plane function Group-ID) .
  • the RAN side has the ability to identify whether the UE supports network slices. If the UE does not support the network segmentation, the message carried by the UE does not have a field of the network slice selection assistance parameter, and the RAN still sends the various types of messages carried by the UE to the NSSF, and the NSSF can select a suitable slice feedback for the UE to the RAN, and the RAN follows.
  • the attach request of the UE is processed according to an attach processing procedure in the 4G EPC network architecture. If the UE supports network slicing.
  • the network slice selection assistance parameter exists in the message carried by the UE.
  • the number of fields, the field may be empty (NULL) or carry a description of the network slice selection parameters (network slice identification, service type, tenant identification, etc.).
  • the possible scenario may be discussed in four cases according to whether the UE carries the network slice selection assistance parameter and whether the RAN has a selection relationship table corresponding to the network slice selection assistance parameter carried by the UE.
  • Scenario 1 The UE carries a network slice selection assistance parameter, and the RAN stores a network slice selection relationship table corresponding to the network slice selection assistance parameter carried by the UE.
  • the network slice selection correspondence table records the correspondence between the network slice selection assistance parameter or the network slice identifier and the network slice selection information.
  • the RAN acquires the network slice selection assistance parameter carried by the UE, the RAN selects the network slice according to the corresponding relationship maintained in the RAN, and then performs step 407, and the steps 402-406 are not performed.
  • Scenario 2 The UE carries the network slice selection assistance parameter, and the network slice selection relationship table corresponding to the network slice selection assistance parameter carried by the UE is not saved in the RAN.
  • the network slice selection correspondence table records the correspondence between the network slice selection assistance parameter or the network slice identifier and the network slice selection information.
  • the RAN after receiving the attach request from the UE, the RAN directly forwards the network slice selection assistance parameter carried by the UE to the slice selection control function entity, and performs a network slice selection process in steps 403-406.
  • Scenario 3 The UE does not carry the network slice selection assistance parameter, and the RAN does not store the correspondence table of the network slice that is contracted with the UE.
  • Scenario 4 The UE does not carry the network slice selection assistance parameter, and the RAN saves the correspondence table of the network slice signed by the UE.
  • the scenario 3 is the same as the scenario 4 solution, that is, the RAN forwards the attach request of the UE to the slice selection control function entity, and then performs the network slice selection process in steps 403-406.
  • the UE may be denied access or assigned a default network slice according to the operator policy.
  • the solution of the scenario 3 may also be as follows (for example, in a specific embodiment, the solution in the scenario 3 may be determined in an alternative manner): optionally, when the UE does not carry the network slice selection assistance parameter Or the network slice identifier, after receiving the network slice identifier of the selected network slice, the RAN informs the UE to select a good network slice identifier and the like, and then the UE To initiate an attach request, see the steps shown in the dashed box in Figure 4.
  • Step 403 The slice selection control function entity acquires user subscription/subscription information of the UE from the subscription database (DATA), and completes the authentication process of the user accessing the network.
  • the subscription database stores the user's subscription data and subscription/contraction information.
  • the user's subscription/contracting information includes the network slice type, network slice identifier or service type that the user subscribes/contracts.
  • the slice selection control function entity initiates an authentication request to the subscription database (DATA), and the subscription database (DATA) feeds back the subscription/subscription relationship of the current UE (for example, The slice selection control function entity determines whether the user can access by comparing the list of the subscription database (DATA) feedback with the network slice selection assistance parameter carried by the UE itself.
  • the network is sliced to complete the authentication process for the user to access the network slice.
  • Step 404 The slice selection control function entity selects a suitable network slice according to one or more of the network slice selection assistance parameter, the user subscription information, the user context, and the related slice selection policy, that is, determines the network slice selection information.
  • the slice selection control function entity maintains a network slice selection assistance parameter (such as Slice-ID, service type, etc.) and a matching network slice control plane function (for example, a network slice corresponding control plane function ID or a control group network function Group-ID)
  • the selection rule specifies the correspondence between the network slice selection assistance parameter and the specific slice.
  • the selection rule also considers various other selection information provided by the user, and selects an appropriate network slice for the UE according to the network slice selection assistance parameter, user subscription information, user context and related slice selection policy provided by the user, wherein the relevant slice selection policy may Obtained from 5G Policy.
  • Step 405 The slice selection control function entity transmits the network slice selection information to the RAN.
  • the network slice selection information includes: a control plane function ID of the network slice or a set ID of the control plane function of the network slice (also referred to as a Group-ID of the control plane function of the network slice).
  • Step 406 The RAN saves or updates the original slice selection method of the network slice selection returned by the slice selection control function entity.
  • Slice selection packet This includes, but is not limited to, the network slice control plane function (such as the control plane function ID of the network slice or the Group-ID of the control plane function of the network slice).
  • Step 407 The RAN side routes the user to the corresponding network slice.
  • the RAN When the RAN acquires the network slice selection information from the slice selection control function entity, the RAN completes the network slice selection process according to the network slice selection information transmitted by the slice selection control function entity.
  • the RAN obtains an IP address corresponding to the network function according to a Domain Name System (DNS) query.
  • DNS Domain Name System
  • the RAN obtains the load of the network slice control plane function in the current pool, and performs load balancing, and then selects a corresponding network slice control plane function by using a DNS query method.
  • the process of steps 402-406 may not be performed, and the RAN directly selects the network slice according to the corresponding relationship maintained by the RAN.
  • Step 408 Perform authentication and authorization of the user access network slice.
  • the network slice control plane function interacts with the subscription database (DATA) to authenticate the user access network slice.
  • DATA subscription database
  • the subscription database can feed back the subscription information of the user under the current PLMN of the network slice control plane function, and the network slice control plane function determines whether the user can access the selected control according to the subscription information.
  • the face network function completes the authentication and authorization of the user access network slice.
  • scenario one scenario one and scenario two.
  • Scenario 1 The selection fails and the UE is not allowed to access. If the RAN is directly selected according to the correspondence between the RAN and the slice selection control function entity, if the correspondence between the RAN configuration expires and the subscription information of the UE changes, the selected network slice cannot match the UE, and the UE access network slice fails. In this case, the RAN receives the information of 'Attach Error', and then sends the network slice selection assistance parameter to the slice selection control function entity, and performs steps 402-406 to obtain the correct slice selection information and execute the subsequent Attach process.
  • Scenario 2 The selection succeeds and the UE is allowed to access. The UE selects the correct network slice and performs subsequent steps. Attach process.
  • the authentication of the user access network slice may also be performed after the slice selection control function entity selects the network slice control plane function ID or the network slice control plane function Group-ID in step 404.
  • Step 409 Complete the subsequent attach process.
  • the network slice when network slice selection is required, the network slice can be flexibly selected based on the network slice identifier or the service type, and the port of the network slice is not required to be specifically configured.
  • different network service functions correspond to different network slices, which avoids mutual influence between various services, and the network stability is higher.
  • the slice selection control function entity selection network function does not have signaling interaction with the network slice, which reduces the number of external interfaces of the network slice.
  • the RAN side stores the network slice selection correspondence table, so that the UE needs to repeatedly access the slice selection function to obtain the network slice selection information when the UE accesses the network slice multiple times.
  • end-to-end network slice management and orchestration needs to configure a slice-ID for the network slice, a corresponding slice selection control function entity, and the like, and update the slice selection control function entity.
  • the notification network has added a new network slice.
  • FIG. 5 shows a flow chart for adding a network slice.
  • FIG. 5 specifically includes steps 501 to 509.
  • Step 501 End-to-end slice management and orchestration generates a new network slice and initiates a slice add instruction to the network function management to indicate that a new network slice has been added to the network.
  • Step 502 The network element management function configures a new network slice control plane function ID or a group-ID of the network slice control plane function for the new network slice.
  • Step 503 Return to the new network slice control plane function ID or the group-ID of the network slice control plane function of the network element management function.
  • Step 504 Notifying the end-to-end slice management and orchestrating the new network slice configuration successfully.
  • Step 505 The end-to-end slice management and orchestration notification slice selection function configuration module updates the network slice correspondence relationship.
  • Step 506 The slice selection function configuration module initiates a request to update the correspondence between the Slice-ID and the new network slice control plane function ID or Group-ID in the slice selection control function entity.
  • a slice selection control function entity stores a network slice selection correspondence table, and records in the table There is a correspondence between network slice selection assistance parameters (such as Slice-ID, service type, etc.) and corresponding slice selection information.
  • the network slice selection information is a selection result made by the slice selection control function entity, and the network slice selection information may be a control surface function identifier (control plane function ID) of the corresponding network slice or a set identifier of the control plane function (control plane function Group-ID) ).
  • Step 507 The slice selection control function entity updates according to the information delivered by the end-to-end slice management and orchestration.
  • Step 508 End-to-end slice management and programming update network slice selection information (newly added network slice selection information, slice order/contract relationship, etc.) in the subscription database (DATA).
  • network slice selection information newly added network slice selection information, slice order/contract relationship, etc.
  • Step 509 The update is completed.
  • different network service functions correspond to different network slices when selected, which avoids mutual influence between various services, and the network stability is higher.
  • the end-to-end unified slice management and orchestration function can update and maintain network slices flexibly and quickly, and the network slices where different slices are located are isolated from each other.
  • FIG. 6 is a flowchart of deleting a network slice according to an embodiment of the present disclosure.
  • the network slice deletion process includes steps 601 to 605.
  • Step 601 End-to-end slice management and orchestration initiates slice deletion, and informs the slice selection of the slice information to be deleted (such as Slice-ID, corresponding network slice control plane function ID or Group-ID of network slice control plane function, etc.) Functional configuration.
  • slice information to be deleted such as Slice-ID, corresponding network slice control plane function ID or Group-ID of network slice control plane function, etc.
  • Step 602 The slice selection function configuration initiates a corresponding relationship instruction in the update slice selection control function entity.
  • Step 603 The slice selection control function entity deletes the stored correspondence (for example, the correspondence between the Slice-ID and the deleted slice).
  • Step 604 The slice management and the arrangement delete the order/contract relationship of the corresponding slice in the subscription database (DATA) and the like.
  • Step 605 Complete the network slice deletion process.
  • different network service functions correspond to different network slices, which avoids mutual influence between various services, and the network stability is higher.
  • the end-to-end unified slice management and orchestration function can maintain network slices flexibly and quickly, and the network slices where different slices are located are isolated from each other.
  • FIG. 7 is a flowchart of updating a network slice according to an embodiment of the present disclosure.
  • the Slice-ID is unchanged, and the corresponding network slice control plane function ID or Group-ID is changed (the network slice control plane function ID or the group-ID of the network slice control plane function is updated).
  • the network slice control plane function corresponding to the slice identifier Slice-ID needs to be modified, the corresponding process needs to be executed to inform the slice selection control function entity, and the slice selection control function entity, the slice correspondence relationship in the RAN or the slice identification slice is modified in time.
  • -ID updating the correspondence between the network slice control plane function and the Slice-ID, and FIG. 7 specifically includes steps 701 to 706.
  • Step 701 The old slice deletes or configures a new network slice identifier Slice-ID, and the new slice allocation corresponds to the new network slice control plane function ID or Group-ID corresponding to the original Slice-ID.
  • Step 702 The end-to-end slice management and orchestration updates the correspondence between the original Slice-ID and the new slice control plane function ID or Group-ID.
  • Step 703 The slice selection function configuration delivers a correspondence relationship to the slice selection control function entity.
  • Step 704 The slice selection control function entity updates the new correspondence (Slice-ID corresponds to a new slice control plane function ID or Group-ID).
  • Step 705 The end-to-end slice management and orchestration informs the subscription database (DATA) to change the user's subscription/contracting relationship.
  • DATA subscription database
  • Step 706 The network slice update is completed.
  • FIG. 8 is a flowchart of updating a network slice according to an embodiment of the present disclosure.
  • the original slice identifies a new network slice corresponding to the slice-ID, and the old network slice needs to be assigned a new slice-ID.
  • the corresponding process is required to notify the slice selection control function entity, and the slice selection control function is modified in time.
  • the entity, the slice correspondence relationship in the RAN or the slice identifier Slice-ID, and the corresponding relationship between the network slice control plane function and the Slice-ID are updated.
  • FIG. 8 specifically includes steps 801 to 806.
  • Step 801 The old slice deletes or configures a new network slice identifier Slice-ID.
  • Step 802 End-to-end slice management and orchestration updates the correspondence between the original Slice-ID and the new slice control plane function ID or Group-ID.
  • Step 803 The slice selection function configuration delivers a correspondence relationship to the slice selection control function entity.
  • Step 804 The slice selection function updates the new correspondence (Slice-ID corresponds to a new slice control plane function ID or Group-ID).
  • Step 805 The end-to-end slice management and orchestration informs the subscription database (DATA) to change the user's subscription/contracting relationship.
  • DATA subscription database
  • Step 806 The network slice update is completed.
  • slice selection function configuration module and the network element management module may be two separate network functions, or may be a single network function combined, similar to the related network management.
  • the slice selection function configuration module may also be one of the end-to-end management functions, and the configuration of the slice selection function is implemented by the end-to-end management function.
  • FIG. 9 is a block diagram of a slice selection control function entity of an embodiment of the present disclosure.
  • the slice selection control function entity 900 includes a first receiving module 901 and a first determining module 902.
  • the first receiving module 901 is configured to acquire one or more of a slice selection policy, a user subscription information, a network slice selection assistance parameter, and a user context.
  • the first determining module 902 is configured to determine network slice selection information according to one or more of the slice selection policy, the user subscription information, the network slice selection assistance parameter, and the user context, and send the determined network slice selection information to the
  • the slice routing function entity is configured to cause the slice routing function entity to perform signaling or data routing.
  • the first receiving module 901 is specifically configured to receive an attach request sent by the slice routing function entity or the access network, where the attach request carries a network slice selection assistance parameter and/or a user context.
  • the first receiving module 901 is specifically configured to obtain a slice selection policy from a 5G policy network function entity.
  • the first receiving module 901 is specifically configured to obtain user subscription information from the subscription database DATA.
  • the slice routing function entity is located in the access network, or is located in the core network, or is located between the core network and the access network, or is combined with the slice selection control function entity, and the slice selection control function is The entity is located in the access network or in the core network or a network functional entity independent of the access network and the core network.
  • the network slice selection assistance parameter is any one of a network slice identifier, a service type, a network slice description symbol, a terminal usage type, and a tenant identifier.
  • the network slice identifier includes a network slice type identifier and/or a network slice instance identifier. knowledge.
  • the network slice identifier may include two parts, one part is a network slice type identifier (for example, an enhanced enhanced mobile broadband (eMBB) slice, an Internet of Things (IoT) slice), and a part is a network slice instance identifier (a type of network).
  • a slice may have multiple entities, for example, an eMBB slice may have multiple instantiated entities).
  • the network slice identifier includes a network slice type identifier and a network slice instance identifier.
  • the core network may construct a fully qualified domain name (FQDN) based on the network slice identifier to find a corresponding network slice or a corresponding network slice control plane function, and the above slice type identifier (slice type) It can be used to determine the user's carrier (such as China Mobile, China Unicom or China Telecom) when the user roams, and determine the network type (such as 4G, 3G, etc.), and then select the corresponding public land mobile network according to the slice type identifier (Public Land) After the Mobile Network (PLMN), the visited operator can access the network slice corresponding to the network slice instance identifier (instance id) according to the network slice instance identifier.
  • FQDN fully qualified domain name
  • the network slice selection information is a control plane function identifier of the network slice accessed by the user or a set identifier of the control plane function.
  • the network slice can be flexibly selected based on the network slice identifier or the service type, and the port of the network slice is not required to be specifically configured.
  • different network service functions correspond to different network slices, which avoids mutual influence between various services, and the network stability is higher. There is no signaling interaction between the slice selection control function entity and the network slice, which reduces the number of external interfaces of the network slice.
  • FIG. 10 is a block diagram of a network slice selection device according to an embodiment of the present disclosure.
  • the device may be a slice routing function entity or an access network side device, and the device 1000 includes a second receiving module 1001 and a first processing module 1002.
  • the second receiving module 1001 is configured to use the network slice selection information sent by the slice selection control function entity, where the network slice selection information is selected by the slice selection control function entity according to a slice selection policy, user subscription information, network slice selection assistance parameter, and user context. One or more of the determinations.
  • the first processing module 1002 is configured to perform signaling or data routing according to the network slice selection information.
  • the slice routing function entity further includes a first sending module, where the first sending module is configured to send the network slice identifier to the terminal, so that the terminal updates according to the received network slice identifier.
  • the stored network slice ID is configured to send the network slice identifier to the terminal, so that the terminal updates according to the received network slice identifier.
  • the network slice selection assistance parameter and/or the user context are obtained by the slice selection control function entity from the received attach request (from the slice routing function entity or the access network) of.
  • the slice selection policy is obtained by the slice selection control function entity from a 5G policy network function entity.
  • the user subscription information is obtained by the slice selection control function entity from a subscription database.
  • the slice routing function entity is located in the access network, or located in the core network, or located between the core network and the access network, or combined with the slice selection control function entity.
  • the slice selection control function entity is located in the access network or in the core network or a network functional entity independent of the access network and the core network.
  • the network slice selection assistance parameter is any one of a network slice identifier, a service type, a network slice description symbol, a terminal usage type, and a tenant identifier.
  • the network slice identifier includes a network slice type identifier and/or a network slice instance identifier.
  • the network slice identifier may include two parts, one part is a network slice type identifier (for example, an enhanced enhanced mobile broadband (eMBB) slice, an Internet of Things (IoT) slice), and a part is a network slice instance identifier (a type of network).
  • a slice may have multiple entities, for example, an eMBB slice may have multiple instantiated entities).
  • the network slice identifier includes a network slice type identifier and a network slice instance identifier.
  • the core network may construct a fully qualified domain name/full name domain name based on the network slice identifier (Fully Qualified Domain Name ( FQDN)) Find the corresponding network slice or corresponding network slice control plane function.
  • FQDN Full Qualified Domain Name
  • the above slice type can be used to determine the user's carrier (such as China Mobile, China Unicom or China Telecom) and determine the network type (such as 4G, 3G, etc.) when the user roams, and then select according to the slice type identifier.
  • the visited operator can access the corresponding network slice instance identifier according to the network slice instance identifier (instance) Id) network slice.
  • the network slice selection information is a control plane function identifier of the network slice accessed by the user or a set identifier of the control plane function.
  • the set identifier of the control plane function identifier or the control plane function of the network slice corresponds to the network slice identifier of the network slice.
  • the slice routing function entity further includes a storage module, where the storage module is configured to obtain a network slice selection correspondence table from the slice selection control function entity, where the network slice selection correspondence table is The correspondence between the network slice selection assistance parameter or the network slice identifier and the network slice selection information is recorded.
  • the slice routing function entity further includes: a third receiving module, configured to receive an attach request, and a second determining module, configured to select a correspondence table and the attach request according to the network slice, Determining network slice selection information; and a second processing module, configured to perform signaling or data routing according to the network slice selection information.
  • the slice routing function entity further includes: a fourth receiving module, configured to: when the network slice selection correspondence table needs to be updated, the slice routing function entity is The slice selection control function entity obtains a correspondence between the new network slice selection assistance parameter and the network slice selection information, and an update module, configured to select the network slice by using a correspondence between the new network slice selection assistance parameter and the network slice selection information.
  • the correspondence table is updated.
  • the slice routing function entity further includes: a resending module, configured to: after receiving the information of the attachment error, resend the network slice selection assistance parameter to the slice selection control function entity to obtain a correct slice selection result.
  • a resending module configured to: after receiving the information of the attachment error, resend the network slice selection assistance parameter to the slice selection control function entity to obtain a correct slice selection result.
  • the network slice When network slice selection is required, the network slice can be flexibly selected based on the network slice identifier or the service type, and the port of the network slice is not required to be specifically configured. Moreover, different network service functions correspond to different network slices, which avoids mutual influence between various services, and the network stability is higher. There is no signaling interaction between the slice selection control function entity and the network slice, which reduces the number of external interfaces of the network slice. Further, the RAN side may store the network slice selection correspondence table, and directly check the network slice selection correspondence table to obtain the network slice selection information, so as to prevent the UE from repeatedly accessing the slice selection function to obtain the network slice selection information when accessing the network slice multiple times.
  • FIG. 11 is a flowchart of a network slice selection method according to an embodiment of the present disclosure.
  • Figure The method shown in 11 includes steps 1101 to 1103.
  • Step 1101 Obtain a network slice identifier, where the network slice identifier includes a network slice type identifier and a network slice instance identifier.
  • the network slice identifier may include two parts, one part is a network slice type identifier (for example, an enhanced enhanced mobile broadband (eMBB) slice, an Internet of Things (IoT) slice), and a part is a network slice instance identifier (a type of network).
  • a slice may have multiple entities, for example, an eMBB slice may have multiple instantiated entities).
  • Step 1102 Identify a public land mobile network PLMN corresponding to the network slice type identifier.
  • Step 1103 Connect the user to the network slice identified by the corresponding network slice instance according to the network slice instance identifier.
  • the core network may construct a fully qualified domain name (FQDN) based on the network slice identifier to find a corresponding network slice or a corresponding network slice control plane function.
  • the slice type identifier can be used to determine the user's carrier (such as China Mobile, China Unicom or China Telecom) and determine the network type (for example, 4G, 3G, etc.) when the user roams, and then identify the identifier according to the slice type.
  • the corresponding public land mobile network (PLMN) the visited operator can access the network slice corresponding to the network slice instance identifier (instance id) according to the network slice instance identifier.
  • FIG. 12 shows a block diagram of a network slice selection device of an embodiment of the present disclosure.
  • the device 1200 includes: an obtaining module 1201, configured to acquire a network slice identifier, where the network slice identifier includes a network slice type identifier and a network slice instance identifier, and a selection module 1202, configured to identify, according to the network slice type identifier, a public land move corresponding to the identifier
  • the network PLMN is configured to access the network slice corresponding to the network slice instance identifier according to the network slice instance identifier.
  • the selecting module is further configured to determine an operator and a network type according to the network slice type identifier, and identify a corresponding PLMN according to the determined carrier and network type.
  • the core network can build a fully qualified domain name/full name domain based on the network slice identifier.
  • the Fully Qualified Domain Name finds the corresponding network slice or corresponding network slice control plane function.
  • the slice type identifier can be used to determine the user's carrier (such as China Mobile, China Unicom or China Telecom) and determine the network type (for example, 4G, 3G, etc.) when the user roams, and then identify the identifier according to the slice type.
  • the corresponding public land mobile network (PLMN) the visited operator can access the network slice corresponding to the network slice instance identifier (instance id) according to the network slice instance identifier.
  • a network slice selection method is also provided in the present disclosure.
  • the method includes a step 1301 and a step 1302.
  • Step 1301 If there is no field of the network slice selection assistance parameter in the message carried by the terminal, the slice routing function entity or the access network side device sends the message carried by the terminal to the slice selection control function entity, so that the slice selection control is performed.
  • the functional entity selects a suitable network slice for the terminal and sends it to the slice routing function entity or the access network side device.
  • Step 1302 The slice routing function entity or the access network side device sends the network slice identifier of the network slice selected by the slice routing function entity or the access network side device to the terminal, and the terminal re-initiates the attach request.
  • a network slice selection device includes: a second sending module, configured to send a message carried by the terminal to the slice selection control function entity to enable the slice selection control function if a field of the network slice selection assistance parameter does not exist in the message carried by the terminal.
  • the entity selects a suitable network slice for the terminal and sends it to the slice routing function entity or the access network side device.
  • the third processing module is configured to send the slice routing function entity or the access network side device to the terminal.
  • the network slice identifier of the selected network slice, and the attachment request is re-initiated by the terminal.
  • a network slice selection method is also provided.
  • the method includes a step 1401 and a step 1402.
  • Step 1401 The end-to-end slice management and orchestration function entity sends a control instruction, which is any one of an instruction to add a new network slice, an instruction to delete a network slice, and an instruction to update a network slice identifier.
  • Step 1402 The end-to-end slice management and orchestration function entity sends an update correspondence relationship message to the slice selection control function entity, so that the slice selection control function entity updates the network slice identifier and The correspondence between the control plane function identifier of the network slice or the set identifier of the control plane function of the network slice.
  • a network slice selection device includes: a third sending module, configured to send a control instruction, where the control instruction is an instruction to add a new network slice, an instruction to delete a network slice, and an instruction to update a network slice identifier; And a module, configured to send an update correspondence message to the slice selection control function entity, so that the slice selection control function entity updates the correspondence between the network slice identifier and the control plane function identifier of the network slice or the set identifier of the control plane function of the network slice .
  • Also provided in the present disclosure is a network architecture that includes a network slice selection device as described above.
  • system and “network” are used interchangeably herein.
  • B corresponding to A means that B is associated with A, and B can be determined from A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the disclosed method and apparatus 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.
  • each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the transceiving method of the various embodiments of the present disclosure.
  • 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, and the program code can be stored. Medium.

Abstract

本公开提供一种网络切片选择方法、设备和系统。该方法包括：切片选择控制功能实体获取切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项；切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定网络切片选择信息，并将确定的网络切片选择信息发送给切片路由功能实体，以使切片路由功能实体执行信令或数据路由。

Description

一种网络切片选择方法、设备及系统
相关申请的交叉引用
本申请主张在2016年7月4日在中国提交的中国专利申请号No.201610518094.0的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种网络切片选择方法、设备及系统。
背景技术
移动网络需要满足更加多样化的业务场景，如低功耗大连接、热点高容量、连续广域覆盖、低时延高可靠性等场景。目前的移动网络是基于一套逻辑架构来服务于各种应用场景的。移动性管理实体(Mobility Management Entity(MME))具备一定的智能，可以基于用户的签约及业务标识进行网关选择。基站可基于MME负载的权重来选择MME。但是这种方案难以适应未来网络中的多种业务场景(例如物联网，低延迟等)，其架构单一、不灵活、难以以较低的成本适应多样化的网络需求，一种网元的故障可能会影响到其它业务的运行。
相关移动网络中还可以通过接入点名称(Access PointName(APN))进行网关(如通用分组无线服务(GPRS)网关支持节点GGSN、公共数据网PDN网关(PGW))的选择，接入点名称(APN)可以作为一种业务标识。但基于APN的网络连接的管理仍然具有无法构建端到端的面向业务的网络，无法对网元设备进行有效隔离，业务以APN粒度区分无法精细化地灵活配置等问题。
网络切片即是为解决上述问题提出的一种技术。通过网络切片，将相关的物理网络资源划分为逻辑上不同的网络，提供针对不同业务场景的类似专有网络的服务。
然而，目前尚未提出有效网络切片选择的解决方案。
发明内容
鉴于上述技术问题，本公开提供一种网络切片选择方法、设备及系统，解决相关技术中无法灵活选择网络切片的技术问题。
依据本发明的一个方面，提供一种网络切片选择方法。该方法包括：切片选择控制功能实体获取切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项；所述切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定网络切片选择信息，并将确定的所述网络切片选择信息发送给切片路由功能实体或者接入网侧设备，以使所述切片路由功能实体或者接入网侧设备执行信令或数据路由。
可选地，所述切片选择控制功能实体获取网络切片选择协助参数和/或用户上下文的方式为：所述切片选择控制功能实体接收切片路由功能实体或接入网发送的附着请求，所述附着请求中携带有网络切片选择协助参数和/或用户上下文；所述切片选择控制功能实体获取切片选择策略的方式为：所述切片选择控制功能实体从第五代移动通信网5G策略网络功能实体中获取切片选择策略；所述切片选择控制功能实体获取用户签约信息的方式为：所述切片选择控制功能实体从签约数据库中获取用户签约信息。
可选地，所述切片路由功能实体位于接入网、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体合并，所述切片选择控制功能实体位于接入网或者位于核心网或者是一个独立于接入网和核心网的网络功能实体。
可选地，所述网络切片选择协助参数为网络切片标识、业务类型、网络切片描述符号、终端使用类型和租户标识中的一项或多项。
可选地，所述网络切片标识包括网络切片类型标识和/或网络切片实例标识。
可选地，所述网络切片选择信息为用户访问的网络切片的控制面功能标识或控制面功能的集合标识。
可选地，所述网络切片的控制面功能标识或控制面功能的集合标识与所 述网络切片的网络切片标识对应。
依据本发明的第二方面，提供了一种网络切片选择方法。该方法包括：切片路由功能实体或接入网侧设备接收切片选择控制功能实体发送的网络切片选择信息，所述网络切片选择信息由所述切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定；所述切片路由功能实体或接入网侧设备根据所述网络切片选择信息执行信令或数据路由。
可选地，所述方法还包括：所述切片路由功能实体或接入网侧设备将网络切片标识发送给终端，以使所述终端根据接收到的网络切片标识更新存储的网络切片标识。
可选地，所述网络切片选择协助参数和/或用户上下文是由所述切片选择控制功能实体从接收到的附着请求中获取的；所述切片选择策略是由所述切片选择控制功能实体从第五代移动通信5G策略网络功能实体中获取的；所述用户签约信息是由所述切片选择控制功能实体从签约数据库中获取。
可选地，所述切片路由功能实体位于接入网、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体合并，所述切片选择控制功能实体位于接入网或者位于核心网或者是一个独立于接入网和核心网的网络功能实体。
可选地，所述网络切片选择协助参数为网络切片标识、业务类型和网络切片描述符号、终端使用类型和租户标识中的一项或多项。
可选地，所述网络切片标识包括网络切片类型标识和/或网络切片实例标识。
可选地，所述网络切片选择信息为用户访问的网络切片的控制面功能标识或控制面功能的集合标识。
可选地，所述网络切片的控制面功能标识或控制面功能的集合标识与所述网络切片的网络切片标识对应。
可选地，所述方法还包括：所述切片路由功能实体或接入网侧设备从所述切片选择控制功能实体获得网络切片选择对应关系表，所述网络切片选择对应关系表中记录有网络切片选择协助参数或网络切片标识与网络切片选择 信息的对应关系。
可选地，所述方法还包括：所述切片路由功能实体或接入网侧设备接收附着请求，所述附着请求中携带有网络切片选择协助参数；所述切片路由功能实体或接入网侧设备根据所述网络切片选择对应关系表和所述网络切片选择协助参数，确定网络切片选择信息；所述切片路由功能实体或接入网侧设备根据所述网络切片选择信息执行信令或数据路由。
可选地，所述方法还包括：所述切片路由功能实体或接入网侧设备从所述切片选择控制功能实体获得新的网络切片选择协助参数与网络切片选择信息的对应关系；所述切片路由功能实体或接入网侧设备利用新的网络切片选择协助参数与网络切片选择信息的对应关系对所述网络切片选择对应关系表进行更新。
可选地，所述方法还包括：若所述切片路由功能实体或接入网侧设备接收到附着错误的信息，所述切片路由功能实体或接入网侧设备重新将所述网络切片选择协助参数发送给所述切片选择控制功能实体，以获取正确的网络切片选择信息。
可选地，所述切片路由功能实体或接入网侧设备具有识别终端是否支持网络切片的能力。
可选地，若所述终端不支持网络切片，所述终端携带的消息中不存在网络切片选择协助参数的字段，所述切片路由功能实体或接入网侧设备将信令转给所述切片选择控制功能实体，以使所述切片选择控制功能实体告知所述终端接入一个网络切片或告知接入的网络切片的控制面功能；若所述终端支持网络切片，所述终端携带的消息中存在网络切片选择协助参数的字段，其中，字段为空NULL或携带有网络切片选择协助参数的描述。
可选地，所述方法还包括：所述切片路由功能实体或接入网侧设备将用户路由到对应网络切片上，由选中的网络切片控制面功能执行用户接入网络切片的鉴权和授权流程。
可选地，由选中的网络切片控制面功能执行用户接入网络切片的鉴权和授权流程，包括：当网络切片的控制面功能发起鉴权请求时，签约数据库反馈网络切片控制面功能当前公共陆地移动网络PLMN下用户的签约信息，网 络切片控制面功能根据签约信息确定用户是否可以接入选中的控制面网络功能，完成用户接入网络切片的鉴权和授权。
依据本公开的第三方面，还提供了一种切片选择控制功能实体。该功能实体包括：第一接收模块，用于获取切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项；第一确定模块，用于根据所述切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定网络切片选择信息，并将确定的所述网络切片选择信息发送给所述切片路由功能实体，以使所述切片路由功能实体执行信令或数据路由。
可选地，所述第一接收模块，具体用于接收切片路由功能实体或接入网发送的附着请求，所述附着请求中携带有网络切片选择协助参数和/或用户上下文；所述第一接收模块，具体用于从第五代移动通信5G策略网络功能实体中获取切片选择策略；所述第一接收模块，具体用于从签约数据库中获取用户签约信息。
可选地，所述切片路由功能实体位于接入网、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体合并，切片选择控制功能实体位于接入网或者位于核心网或者是一个独立于接入网和核心网的网络功能实体。
可选地，所述网络切片选择协助参数为网络切片标识、业务类型、网络切片描述符号、终端使用类型和租户标识中的一项或多项。
可选地，所述网络切片标识包括网络切片类型标识和/或网络切片实例标识。
可选地，所述网络切片选择信息为用户访问的网络切片的控制面功能标识或控制面功能的集合标识。
依据本公开的第四方面，提供了一种网络切片选择设备。该设备包括：第二接收模块，用于接收切片选择控制功能实体发送的网络切片选择信息，所述网络切片选择信息由所述切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定；第一处理模块，用于根据所述网络切片选择信息执行信令或数据路由。
可选地，所述设备还包括：第一发送模块，用于将网络切片标识发送给 终端，以使所述终端根据接收到的网络切片标识更新存储的网络切片标识。
可选地，所述网络切片选择协助参数和/或用户上下文是由所述切片选择控制功能实体从接收到的附着请求中获取；所述切片选择策略是由所述切片选择控制功能实体从5G策略网络功能实体中获取；所述用户签约信息是由所述切片选择控制功能实体从签约数据库中获取。
可选地，所述设备为切片路由功能实体，所述切片路由功能实体位于接入网、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体合并，所述切片选择控制功能实体位于接入网或者位于核心网或者是一个独立于接入网和核心网的网络功能实体。
可选地，所述网络切片选择协助参数为网络切片标识、业务类型、网络切片描述符号、终端使用类型和租户标识中的一项或多项。
可选地，所述网络切片标识包括网络切片类型标识和/或网络切片实例标识。
可选地，所述网络切片选择信息为用户访问的网络切片的控制面功能标识或控制面功能的集合标识。
可选地，所述网络切片的控制面功能标识或控制面功能的集合标识与所述网络切片的网络切片标识对应。
可选地，所述设备还包括：存储模块，用于从所述切片选择控制功能实体获得网络切片选择对应关系表，所述网络切片选择对应关系表中记录有网络切片选择协助参数或网络切片标识与网络切片选择信息的对应关系。
可选地，所述设备还包括：第三接收模块，用于接收附着请求，所述附着请求中携带有网络切片选择协助参数；第二确定模块，用于根据网络切片选择对应关系表和所述网络切片选择协助参数，确定网络切片选择信息；第二处理模块，用于根据所述网络切片选择信息执行信令或数据路由。
可选地，所述设备还包括：第四接收模块，用于从所述切片选择控制功能实体获得新的网络切片选择协助参数与网络切片选择信息的对应关系；更新模块，用于利用新的网络切片选择协助参数与网络切片选择信息的对应关系对所述网络切片选择对应关系表进行更新。
可选地，所述设备还包括：重新发送模块，用于若接收到附着错误的信 息，重新将网络切片选择协助参数发送给切片选择控制功能实体，以获取正确的切片选择结果。
依据本公开的第五方面，提供了一种网络切片选择方法。该方法适用于漫游场景并且包括：获取网络切片标识，所述网络切片标识包括网络切片类型标识和网络切片实例标识；根据所述网络切片类型标识标识对应的公共陆地移动网络PLMN；根据所述网络切片实例标识将用户接入对应所述网络切片实例标识的网络切片。
可选地，根据所述网络切片类型标识标识对应的公共陆地移动网络PLMN，包括：根据所述网络切片类型标识确定运营商和网络类型；根据确定的运营商和网络类型选择对应的PLMN。
依据本公开的第六方面，提供了一种网络切片选择设备。该设备包括：获取模块，用于获取网络切片标识，所述网络切片标识包括网络切片类型标识和网络切片实例标识；选择模块，用于根据所述网络切片类型标识标识对应的公共陆地移动网络PLMN；接入模块，用于根据所述网络切片实例标识将用户接入对应所述网络切片实例标识的网络切片。
可选地，所述选择模块进一步用于根据所述网络切片类型标识确定运营商和网络类型；根据确定的运营商和网络类型选择对应的PLMN。
依据本公开的第七方面，提供了一种网络切片选择方法。该方法包括：若终端携带的消息中不存在网络切片选择协助参数的字段，切片路由功能实体或接入网侧设备将所终端携带的消息发给切片选择控制功能实体，以使所述切片选择控制功能实体为所述终端选择一个合适的网络切片并发送给所述切片路由功能实体或接入网侧设备；所述切片路由功能实体或接入网侧设备向所终端发送所述切片路由功能实体或接入网侧设备选择的网络切片的网络切片标识，由所述终端重新发起附着请求。
依据本公开的第八方面，提供了一种网络切片选择设备。该设备包括：第二发送模块，用于若终端携带的消息中不存在网络切片选择协助参数的字段，将所终端携带的消息发给切片选择控制功能实体，以使所述切片选择控制功能实体为所述终端选择一个合适的网络切片并发送给所述切片路由功能实体或接入网侧设备；第三处理模块，用于向所终端发送所述切片路由功能 实体或接入网侧设备选择的网络切片的网络切片标识，由所述终端重新发起附着请求。
依据本公开的第九方面，提供了一种网络切片选择方法。该方法包括：端到端切片管理和编排功能实体发送控制指令，所述控制指令为添加新的网络切片的指令、删除网络切片的指令和更新网络切片标识的指令中的任意一种；所述端到端切片管理和编排功能实体向切片选择控制功能实体发送更新对应关系消息，以使所述切片选择控制功能实体更新网络切片标识和网络切片的控制面功能标识或网络切片的控制面功能的集合标识的对应关系。
依据本公开的第十方面，提供了一种网络切片选择设备。该设备包括：第三发送模块，用于发送控制指令，所述控制指令为添加新的网络切片的指令、删除网络切片的指令和更新网络切片标识的指令中的任意一种；第四发送模块，用于向切片选择控制功能实体发送更新对应关系消息，以使所述切片选择控制功能实体更新网络切片标识和网络切片的控制面功能标识或网络切片的控制面功能的集合标识的对应关系。
上述技术方案中的一个技术方案具有如下优点或有益效果：在需要进行网络切片选择时，可以基于网络切片标识或业务类型灵活的选择网络切片，不需要具体的去配置网络切片的端口。而且不同的网络业务功能对应不同的网络切片，避免了各种业务之间的相互影响，网络稳定性更高。切片选择控制功能实体与网络切片之间不存在信令交互，减少了网络切片的对外接口数目。进一步地，RAN侧可存储网络切片选择对应关系表，直接查网络切片选择对应关系表获取网络切片选择信息，避免UE多次接入网络切片时需要重复访问切片选择功能获取网络切片选择信息。
附图说明
图1为根据本公开的一个示例性应用场景的网络切片架构的示意图；
图2为本公开的实施例的网络切片选择方法的流程图；
图3为本公开的实施例的网络切片选择方法的流程图；
图4为本公开的实施例的选择和附着网络切片的流程图；
图5为本公开的实施例的添加网络切片的流程图；
图6为本公开的实施例的删除网络切片的流程图；
图7为本公开的实施例的更新网络切片的流程图；
图8为本公开的实施例的更新网络切片的流程图；
图9为本公开的实施例的切片选择控制功能实体的框图；
图10为本公开的实施例的网络切片选择设备的框图；
图11为本公开的实施例的网络切片选择方法的流程图；以及
图12为本公开的实施例的网络切片选择设备的框图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
本领域技术人员知道，本公开的实施例可以实现为一种系统、装置、设备、方法或计算机程序产品。因此，本公开的实施例可以具体实现为以下形式：完全的硬件、完全的软件(包括固件、驻留软件、微代码等)或者硬件和软件结合的形式。
参见图1，图1为本公开的一个示例性应用场景的网络切片架构的示意图。网络切片的选择是指区分不同场景的流量，并将不同场景的流量引导至不同的网络切片的方法。网络切片是端到端的逻辑的移动网络，包括接入网和核心网的功能。当然，网络切片也可以仅仅包括核心网。
网络切片的选择包括切片选择控制功能实体和路由功能。路由功能可以位于无线接入网(RAN)侧，负责网络切片相关的信令和数据的传递；切片选择控制功能实体(Slice Select Control Function(SSCF))可以存在于RAN侧，也可以存在于核心网侧，或者也可以是一个独立于RAN和核心网的网络功能。切片选择控制功能实体可以根据如下信息中的一项或者多项来确定网络切片选择信息(或者也可称为选择的网络切片信息)，并将网络切片选择信息反馈给RAN，以使RAN执行信令或数据路由。需要说明的是，上述网络切片选择信息是切片选择控制功能实体做的选择结果，体现的是选中的网络 切片控制面功能标识或控制面功能的集合标识。
上述信息中的一项或多项可以是(1)网络切片选择协助参数、(2)用户签约信息、(3)用户上下文(例如小区标识等)和(4)切片选择策略。
(1)网络切片选择协助参数：网络切片选择协助参数可以是从RAN侧获取的，例如网络切片标识、业务类型、其它切片选择辅助参数、网络切片描述符号、租户标识、终端使用类型(UE USAGE TYPE)等。例如，附着请求中携带该网络切片选择协助参数。
上述网络切片标识可以包括两部分，一部分是网络切片类型标识(例如标识增强型移动宽带(eMBB)切片、物联网(Internet of Things(IoT))
Figure PCTCN2017091580-appb-000001
)，一部分是网络切片实例标识(一类网络切片可能有多个实体，例如eMBB切片可能有多个实例化实体)。
需要说明的是，在本实施例中，网络切片标识包括网络切片类型标识和/或网络切片实例标识.在漫游场景中，核心网可以基于网络切片标识构建完全合格域名/全称域名(Fully Qualified Domain Name(FQDN))找到相应的网络切片或对应的网络切片控制面功能。上述切片类型标识(slice type)可以用来在用户漫游时，确定用户的运营商(例如中国移动、中国联通或中国电信)以及确定网络类型(例如第四代移动通信(4G)、第三代移动通信(3G)等)。然后根据切片类型标识标识对应的公共陆地移动网络(Public Land Mobile Network(PLMN))后，拜访地运营商可根据网络切片实例标识将用户接入对应该网络切片实例标识(instance id)的网络切片。
(2)用户签约信息：从签约数据库获取的用户签约数据。
(3)用户上下文(例如小区标识等)：用户上下文可以单独作为一类选择信息，也可以放在切片选择协助参数里从RAN侧获取。
(4)切片选择策略：例如基于用户或业务类型等的切片选择策略。可以从第五代移动通信(5G)网络策略功能(对应图中5G Policy网络功能)获取，或者也可以是对SSCF配置选择策略。例如切片选择策略可以包括：网络拥塞情况下高优先级的客户可以接入网络切片，低优先级的客户不可以接入等，当然也并不限于此。
在初次选择网络切片时，用户将携带的网络切片选择协助参数(如网络 切片标识Slice-ID或者业务类型等)传递给RAN，RAN访问独立的切片选择控制功能实体来获取网络切片选择信息，并根据网络切片选择信息执行信令或数据路由。需要说明的是，网络切片选择信息可以是用户访问的网络切片的控制面功能ID或控制面功能的集合ID(也可称为控制面功能Group-ID)，可以理解为网络切片的入口地址。网络切片的控制面功能在网络切片中可以是一个网络功能，也可以是一个网络功能的集合，所以经由切片选择控制功能实体选择后返回的网络切片选择信息可以是一个控制面功能ID，也可能是一类控制面功能的集合ID。
下面结合图1的应用场景中的网络架构，参考图2来描述根据本公开示例性实施例的网络切片选择方法。需要说明的是，上述应用场景仅是为了便于理解本公开的精神和原理而示出，本公开的实施例在此方面不受任何限制。相反，本公开的实施例可以应用于适用的任何场景。
图2示意性地示出根据本公开的实施例的网络切片选择方法的流程图。图2所示的网络切片选择方法包括步骤201和步骤202。
步骤201：切片选择控制功能实体获取切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项。
可选地，所述切片选择控制功能实体接收切片路由功能实体或接入网发送的附着请求，所述附着请求中携带有网络切片选择协助参数和/或用户上下文；所述切片选择控制功能实体从5G策略网络功能实体中获取切片选择策略；所述切片选择控制功能实体从签约数据库(DATA)中获取用户签约信息。
上述用户签约信息是指从签约数据库获取的用户签约数据，签约数据可包括：用户订购/签约的网络切片类型、网络切片标识或业务类型等，需要说明的是，在本实施例中并不限定用户签约数据的具体内容。
上述网络切片选择协助参数可以为网络切片标识(Slice Identifier(Slice-ID))、业务类型、网络切片描述符号、租户标识和终端使用类型中的一项或多项。上述业务类型例如物联网业务，高带宽、低时延业务等。上述用户上下文可以是小区标识等，当然也并不限于此。
上述网络切片标识可以包括两部分。一部分是网络切片类型标识(例如标识增强型移动宽带(eMBB)切片、物联网(Internet of Things(IoT))切 片)，一部分是网络切片实例标识(一类网络切片可能有多个实体，例如eMBB切片可能有多个实例化实体)。
需要说明的是，在本实施例中，网络切片标识包括网络切片类型标识和/或网络切片实例标识。在漫游场景中，核心网可以基于网络切片标识构建完全合格域名/全称域名(Fully Qualified Domain Name(FQDN))找到相应的网络切片或对应的网络切片控制面功能。上述切片类型标识(slice type)可以用来在用户漫游时，确定用户的运营商(例如中国移动、中国联通或中国电信)以及确定网络类型(例如4G、3G等)，然后根据切片类型标识标识对应的公共陆地移动网络(Public Land Mobile Network(PLMN))后，拜访地运营商可根据网络切片实例标识将用户接入对应该网络切片实例标识(instance id)的网络切片。
上述路由功能可以位于RAN(无线接入网)侧、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体合并，负责网络切片相关的信令和数据的传递；上述切片选择控制功能实体，可以存在于RAN侧，也可以存在于核心网，也可以是一个独立于RAN和核心网的网络功能。
步骤202、切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定网络切片选择信息，并将确定的网络切片选择信息发送给切片路由功能实体，以使所述切片路由功能实体执行信令或数据路由。
例如；切片选择控制功能实体根据切片选择策略确定网络切片选择信息；或者切片选择控制功能实体根据用户签约信息确定网络切片选择信息；或者切片选择控制功能实体根据网络切片选择协助参数确定网络切片选择信息；或者切片选择控制功能实体根据用户上下文确定网络切片选择信息；或者切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文确定网络切片选择信息。当然也并不限于此。
上述切片选择策略是指基于用户或业务类型等的切片选择策略，可以从5G网络策略功能(对应图中5G Policy网络功能)获取，也可以是对SSCF配置的切换选择策略，当然也并不限于此。
上述网络切片选择信息是切片选择控制功能实体做的选择结果，网络切 片选择信息可以为用户访问的网络切片的控制面功能标识(控制面功能ID)或控制面功能的集合标识(控制面功能Group-ID)。上述网络切片的控制面功能标识或控制面功能的集合标识与所述网络切片的网络切片标识对应。即，可以根据网络切片标识查找网络切片对应的控制面功能标识或控制面功能的集合标识。
在本实施例中，在需要进行网络切片选择时，切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定网络切片选择信息，从而实现可以基于网络切片标识、切片选择策略、小区标识或业务类型等灵活的选择网络切片，不需要具体的去配置网络切片的端口，而且不同的网络业务可以对应不同的网络切片，避免了各种业务之间的相互影响，网络稳定性更高。切片选择控制功能实体与网络切片之间不存在信令交互，减少了网络切片的对外接口数目。
下面结合图1的应用场景中的网络架构，参考图3来描述根据本公开示例性实施例的网络切片选择方法。需要说明的是，上述应用场景仅是为了便于理解本公开的精神和原理而示出，本公开的实施例在此方面不受任何限制。相反，本公开的实施例可以应用于适用的任何场景。
图3示意性地示出根据本公开的实施例的网络切片选择方法的流程图。图3所示的方法包括步骤301和步骤302。
步骤301：切片路由功能实体或接入网侧设备接收切片选择控制功能实体发送的网络切片选择信息，所述网络切片选择信息由切片选择控制功能实体切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定。
例如；切片选择控制功能实体根据切片选择策略确定网络切片选择信息；或者切片选择控制功能实体根据用户签约信息确定网络切片选择信息；或者切片选择控制功能实体根据网络切片选择协助参数确定网络切片选择信息；或者切片选择控制功能实体根据用户上下文确定网络切片选择信息；或者切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文确定网络切片选择信息。当然也并不限于此。
上述网络切片选择协助参数可以从来自RAN的附着请求中获取，当然也 并不限于此。
上述用户上下文可以从来自RAN的附着请求中获取，当然也并不限于此。
上述用户签约信息是指从签约数据库获取的用户签约数据，签约数据可包括：用户订购/签约的网络切片类型、网络切片标识或业务类型等。需要说明的是，在本实施例中并不限定用户签约数据的具体内容。
上述切片选择策略可以是指基于用户或业务类型等的切片选择策略，可以从5G网络策略功能(对应图中5G Policy网络功能)获取，也可以是对SSCF配置的切换选择策略，当然也并不限于此。
所述网络切片选择协助参数为网络切片标识(Slice Identifier(Slice-ID))、业务类型、网络切片描述符号和租户标识中的任意一种。上述业务类型例如物联网业务，高带宽、低时延业务等。上述用户上下文可以是小区标识等。
上述网络切片标识可以包括两部分，一部分是网络切片类型标识(例如标识增强型移动宽带(eMBB)切片、物联网(Internet of Things(IoT))切片)，一部分是网络切片实例标识(一类网络切片可能有多个实体，例如eMBB切片可能有多个实例化实体)。
需要说明的是，在本实施例中，网络切片标识包括用于确定运营商和网络类型的网络切片类型标识和用于确定具体网络切片的网络切片实例标识。在漫游场景中，核心网可以基于网络切片标识构建完全合格域名/全称域名(Fully Qualified Domain Name(FQDN))找到相应的网络切片或对应的网络切片控制面功能，上述切片类型标识(slice type)可以用来在用户漫游时，确定用户的运营商(例如中国移动、中国联通或中国电信)以及确定网络类型(例如4G、3G等)，然后根据切片类型标识选择对应的公共陆地移动网络(Public Land Mobile Network(PLMN))后，拜访地运营商可根据网络切片实例标识将用户接入对应该网络切片实例标识(instance id)的网络切片。
上述路由功能可以位于RAN(无线接入网)、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体结合，负责网络切片相关的信令和数据的传递；上述切片选择控制功能实体可以存在于RAN，也可以存在于核心网，或者也可以是一个独立于RAN和核心网的网络功能。
上述网络切片选择信息是切片选择控制功能实体做的选择结果，上述网 络切片选择信息可以为与用户访问的业务需求对应网络切片的控制面功能标识或控制面功能的集合标识。上述网络切片的控制面功能标识或控制面功能的集合标识与所述网络切片的网络切片标识对应。即，可以根据网络切片标识查找网络切片对应的控制面功能标识或控制面功能的集合标识。
步骤302：所述切片路由功能实体或接入网侧设备根据所述网络切片选择信息执行信令或数据路由。
可选地，在本实施例中，所述方法还包括：所述切片路由功能实体或接入网侧设备从所述切片选择控制功能实体获得网络切片选择对应关系表，所述网络切片选择对应关系表中记录有网络切片选择协助参数或网络切片标识与网络切片选择信息的对应关系。
在本实施例中，当用户再次接入网络切片时，可以根据网络切片选择对应关系表直接将与用户终端(UE)导到与网络切片选择协助参数对应的网络切片入口点处，无需重新访问切片选择控制功能实体获取对应关系。
可选地，在本实施例中，所述方法还包括：所述切片路由功能实体或接入网侧设备接收附着请求，所述附着请求中携带有网络切片选择协助参数；所述切片路由功能实体根据网络切片选择对应关系表和所述网络切片选择协助参数，确定网络切片选择信息；所述切片路由功能实体根据所述网络切片选择信息执行信令或数据路由。
在本实施例中，若因RAN侧配置的网络切片选择对应关系表过期或者UE订购/签约关系改变等原因导致选择错误，网络切片选择的容错机制允许RAN再次访问切片选择控制功能实体获取正确的切片选择信息，选择正确的网络切片并更新RAN侧的网络切片选择对应关系表。
可选地，在本实施例中，所述方法还包括：所述切片路由功能实体或接入网侧设备从所述切片选择控制功能实体获得新的网络切片选择协助参数与网络切片选择信息的对应关系；所述切片路由功能实体或接入网侧设备利用新的网络切片选择协助参数与网络切片选择信息的对应关系对所述网络切片选择对应关系表进行更新。
在本实施例中个，以下情况下需要更新上述对应关系，：因RAN侧配置的网络切片选择对应关系表过期或者UE订购/签约关系改变等原因导致选择 错误等，当然也并不限于此。
可选地，在本实施例中，该方法还包括：若所述切片路由功能实体或接入网侧设备接收到附着错误的信息，所述切片路由功能实体重新将所述网络切片选择协助参数发送给所述切片选择控制功能实体，以获取正确的网络切片选择结果。
在本实施例中，在需要进行网络切片选择时，切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定网络切片选择信息，从而实现可以基于网络切片标识、切片选择策略、小区标识或业务类型灵活的选择网络切片等，不需要具体的去配置网络切片的端口，而且不同的网络业务功能对应不同的网络切片，避免了各种业务之间的相互影响，网络稳定性更高。切片选择控制功能实体与网络切片之间不存在信令交互，减少了网络切片的对外接口数目。进一步地，RAN侧或切片路由功能实体可存储网络切片选择对应关系表，直接查网络切片选择对应关系表获取网络切片选择信息，避免UE多次接入网络切片时需要重复访问切片选择功能获取网络切片选择信息。
参见图4，图4示出了选择网络切片以及附着(attach)网络切片的流程图。图4具体包括步骤401至步骤409。
步骤401：用户终端(UE)发送附着请求至无线接入网(RAN)。
在附着请求中，UE将网络切片选择协助参数发送给RAN中的基站，其中，网络切片选择协助参数包括但不限于网络切片标识(Slice-ID)、业务类型等。
具体地，UE向RAN侧发起附着请求，包含附着请求消息(Attach Request Message)和无线资源控制(Radio Resource Control(RRC))参数等信息。其中，RRC参数中包括网络切片选择协助参数，如Slice-ID信息、业务类型等。
上述网络切片标识可以包括两部分，一部分是网络切片类型标识(例如标识增强型移动宽带(eMBB)切片、物联网(Internet of Things(IoT))切片)，一部分是网络切片实例标识(一类网络切片可能有多个实体，例如eMBB切片可能有多个实例化实体)。
需要说明的是，在本实施例中，网络切片标识包括网络切片类型标识和 网络切片实例标识。在漫游场景中，核心网可以基于网络切片标识构建完全合格域名/全称域名(Fully Qualified Domain Name(FQDN))找到相应的网络切片或对应的网络切片控制面功能。上述切片类型标识(slice type)可以用来在用户漫游时，确定用户的运营商(例如中国移动、中国联通或中国电信)以及确定网络类型(例如4G、3G等)，然后根据切片类型标识选择对应的公共陆地移动网络(Public Land Mobile Network(PLMN))后，拜访地运营商可根据网络切片实例标识将用户接入对应该网络切片实例标识(instance id)的网络切片。
步骤402：RAN向切片选择控制功能实体(或者称为切片选择控制功能实体)发送附着请求。
RAN侧维护一个UE携带的网络切片选择协助参数(例如Slice-ID、业务类型等)与对应的网络切片控制面功能(例如对应的网络切片控制网元)的对应关系。RAN可以将UE携带的附着请求传递给切片选择控制功能实体，供切片选择控制功能实体获取网络切片选择信息。网络切片选择信息包括但不限于：与UE携带的网络切片选择协助参数对应的网络切片控制面功能ID或网络切片控制面功能集合的ID(或者也可称为网络切片控制面功能Group-ID)。
当然，RAN也可根据RAN自身维护的网络切片选择对应关系表直接查表获取网络切片选择信息，该切片选择信息包括但不限于：对应选中网络切片的网络切片控制面功能ID或网络切片控制面功能集合的ID。网络切片选择对应关系表中记录有网络切片选择协助参数或网络切片标识与网络切片选择信息的对应关系。网络切片选择信息是切片选择控制功能实体做的选择结果，网络切片选择信息可以为对应网络切片的控制面功能标识(控制面功能ID)或控制面功能的集合标识(控制面功能Group-ID)。
可选的，RAN侧具有识别UE是否支持网络切片的能力。若UE不支持网络切片，UE携带的消息中不存在网络切片选择协助参数的字段，RAN仍然将UE携带的各类消息发给NSSF，NSSF可以为UE选择一个合适的切片反馈给RAN，RAN后续按照4G EPC网络架构中的附着处理流程处理UE的附着请求。若UE支持网络切片。UE携带的消息中存在网络切片选择协助参 数的字段，字段有可能为空(NULL)或携带有网络切片选择参数的描述(网络切片标识、服务类型、租户标识等)。
若UE支持网络切片，此处可以根据UE是否携带网络切片选择协助参数、RAN中是否保存有与UE携带的网络切片选择协助参数对应的选择关系表，将可能的场景分四种情况讨论。
场景一：UE携带网络切片选择协助参数，RAN中保存有与UE携带的网络切片选择协助参数对应的网络切片选择关系表。
网络切片选择对应关系表中记录有网络切片选择协助参数或网络切片标识与网络切片选择信息的对应关系。在场景一中，RAN获取UE携带的网络切片选择协助参数后，直接根据RAN内维护的对应关系选择网络切片，然后执行步骤407，步骤402-406不执行。
场景二：UE携带网络切片选择协助参数，RAN中没有保存与UE携带的网络切片选择协助参数对应的网络切片选择关系表。
网络切片选择对应关系表中记录有网络切片选择协助参数或网络切片标识与网络切片选择信息的对应关系。在场景二中，RAN收到UE侧的附着请求后，直接将UE携带的网络切片选择协助参数转发给切片选择控制功能实体，执行步骤403-406网络切片选择流程。
场景三、UE不携带网络切片选择协助参数，RAN中没有保存与UE签约的网络切片的对应关系表。
场景四、UE不携带网络切片选择协助参数，RAN中保存与UE签约的网络切片的对应关系表。
上述场景三和场景四解决方案相同，即RAN将UE的附着请求转发给切片选择控制功能实体，然后执行步骤403-406网络切片选择流程。此外，在场景三情况下，若UE没有订购/签约任何网络切片服务，可以根据运营商策略拒绝UE接入或为UE分配一个缺省的网络切片。
需要说明的是，场景三的解决方案还可以如下(例如在具体实施例中，可采用二选一的方式确定场景三中的解决方案)：可选地，当UE不携带网络切片选择协助参数或者网络切片标识时，RAN在接收到选择好的网络切片的网络切片标识后，RAN告知UE选择好的网络切片标识等信息，然后UE重 新发起附着请求，参见图4中的虚线框内所示的步骤。
步骤403、切片选择控制功能实体从签约数据库(DATA)获取UE的用户订购/签约信息，完成用户接入网络的认证流程。
签约数据库(DATA)中存储用户的签约数据和订购/签约信息。用户的订购/签约信息包含用户订购/签约的网络切片类型、网络切片标识或业务类型等。
例如：参照演进的分组核心网(Evolved Packet Core(EPC))架构，切片选择控制功能实体向签约数据库(DATA)发起一个认证要求，签约数据库(DATA)反馈当前UE的订购/签约关系(例如已订购/签约的网络切片的Slice-ID列表或业务类型列表等)，切片选择控制功能实体通过比对签约数据库(DATA)反馈的列表与UE自身携带的网络切片选择协助参数决定用户是否可以接入网络切片，完成用户接入网络切片的认证流程。
步骤404：切片选择控制功能实体根据网络切片选择协助参数、用户签约信息、用户上下文及相关的切片选择策略中的一项或多项选择一个适合的网络切片，即确定网络切片选择信息。
切片选择控制功能实体中维护一个网络切片选择协助参数(例如Slice-ID、业务类型等)与相匹配网络切片控制面功能(例如网络切片对应控制面功能ID或控制面网络功能的Group-ID)的选择规则，规定网络切片选择协助参数和具体切片的对应关系。选择规则也考虑用户提供的各种其他选择信息，根据用户提供的网络切片选择协助参数、用户签约信息、用户上下文及相关切片选择策略为UE选择一个合适的网络切片，其中，相关切片选择策略可以从5G Policy中获取。
步骤405：切片选择控制功能实体将网络切片选择信息传递给RAN。
上述网络切片选择信息包括：网络切片的控制面功能ID或网络切片的控制面功能的集合ID(也可称为网络切片的控制面功能的Group-ID)。
步骤406：RAN将切片选择控制功能实体返回的切片选择结果保存或更新原有维护的网络切片选择对应关系表。
上述网络切片选择对应关系表中记录有网络切片选择协助参数(如Slice-ID、业务类型等)和对应的切片选择信息的对应关系。切片选择信息包 括但不限于网络切片控制面功能(如网络切片的控制面功能ID或者网络切片的控制面功能的Group-ID)。
步骤407：RAN侧将用户路由到对应网络切片上。
当RAN从切片选择控制功能实体获取网络切片选择信息时，RAN根据切片选择控制功能实体传递的网络切片选择信息，完成网络切片选择流程。
例如，当切片选择结果为一个网络切片控制面功能ID时，RAN根据域名系统(Domain Name System(DNS))查询获取对应网络功能的IP地址。当网络切片选择信息为网络切片控制面功能Group-ID时，RAN获取当前Pool里网络切片控制面功能的负载，并做负载均衡，之后通过DNS查询方法选择对应的网络切片控制面功能。
若RAN中存在网络切片选择协助参数与网络切片控制面功能ID或Group-ID的对应关系，可不执行上述步骤402-406流程，RAN直接根据自身维护的对应关系选择网络切片。
步骤408：执行用户接入网络切片的鉴权和授权。
例如，网络切片控制面功能与签约数据库(DATA)交互进行用户接入网络切片的鉴权。
当网络切片的控制面功能发起鉴权请求时，签约数据库(DATA)可以反馈网络切片控制面功能当前PLMN下用户的签约信息，网络切片控制面功能根据签约信息确定用户是否可以接入选中的控制面网络功能，完成用户接入网络切片的鉴权和授权。
这种情况下需要考虑网络切片选择的错误处理流程，此种场景下有两种可能：场景一和场景二。
场景一：选择失败，不允许UE接入。若直接根据RAN的对应关系选择，不经过切片选择控制功能实体，在RAN配置的对应关系过期、UE的签约信息改变等情况下，选中的网络切片与UE不能匹配，UE接入网络切片失败，这种情况下RAN收到‘Attach Error’的信息，重新将网络切片选择协助参数发送给切片选择控制功能实体，执行步骤402-406，获取正确的切片选择信息，执行后续Attach流程。
场景二：选择成功，允许UE接入。UE选中正确的网络切片，执行后续 Attach流程。
此外，用户接入网络切片的鉴权也可以在步骤404切片选择控制功能实体选择好网络切片控制面功能ID或网络切片控制面功能Group-ID后。
步骤409：完成后续附着(attach)流程。
在本实施例中，在需要进行网络切片选择时，可以基于网络切片标识或业务类型灵活的选择网络切片，不需要具体的去配置网络切片的端口。而且不同的网络业务功能对应不同的网络切片，避免了各种业务之间的相互影响，网络稳定性更高。切片选择控制功能实体选择网络功能不与网络切片之间存在信令交互，减少了网络切片的对外接口数目。进一步地，RAN侧存储网络切片选择对应关系表，避免UE多次接入网络切片时需要重复访问切片选择功能获取网络切片选择信息。
在上述实施例的基础上，当网络中新建一个网络切片时，端到端的网络切片管理和编排需要为网络切片配置Slice-ID、对应的切片选择控制功能实体等，更新切片选择控制功能实体中的对应关系，通知网络中添加了新的网络切片。
参见图5，图5示出添加网络切片的流程图。图5具体包括步骤501至步骤509。
步骤501：端到端的切片管理和编排生成新的网络切片，并向网络功能管理发起切片添加指令，指示在网络中已添加一个新的网络切片。
步骤502：网元管理功能给新的网络切片配置新的网络切片控制面功能ID或网络切片控制面功能的Group-ID。
步骤503：返回网元管理功能新的网络切片控制面功能ID或网络切片控制面功能的Group-ID。
步骤504：通知端到端的切片管理和编排新网络切片配置成功。
步骤505：端到端切片管理和编排通知切片选择功能配置模块更新网络切片对应关系。
步骤506：切片选择功能配置模块发起更新切片选择控制功能实体中Slice-ID与新网络切片控制面功能ID或Group-ID对应关系的请求。
切片选择控制功能实体上存储有网络切片选择对应关系表，该表中记录 有网络切片选择协助参数(如Slice-ID、业务类型等)和对应的切片选择信息的对应关系。上述网络切片选择信息是切片选择控制功能实体做的选择结果，网络切片选择信息可以为对应网络切片的控制面功能标识(控制面功能ID)或控制面功能的集合标识(控制面功能Group-ID)。
步骤507：切片选择控制功能实体根据端到端切片管理和编排传递的信息更新。
步骤508：端到端切片管理和编排更新签约数据库(DATA)中的网络切片选择信息(新添加的网络切片选择信息，切片订购/签约关系等)。
步骤509：完成更新。
在本实施例中，在选择时，不同的网络业务功能对应不同的网络切片，避免了各种业务之间的相互影响，网络稳定性更高。端到端的统一切片管理和编排功能可以灵活快捷的更新维护网络切片，不同Slice所在的网络切片相互隔离。
在上述实施例的基础上，参见图6，图6为本公开的实施例的删除网络切片的流程图。当网络中删除一个网络切片时，需要告知相关网络删除这个网络切片的Slice-ID及对应关系。网络切片删除流程包括步骤601至步骤605。
步骤601：端到端的切片管理和编排发起切片删除，并将需要删除的切片信息(如Slice-ID、对应的网络切片控制面功能ID或网络切片控制面功能的Group-ID等)告知切片选择功能配置。
步骤602：切片选择功能配置发起更新切片选择控制功能实体中的对应关系指令。
步骤603：切片选择控制功能实体删除存储的对应关系(例如Slice-ID与被删除切片的对应关系)。
步骤604：切片管理和编排删除签约数据库(DATA)中相应切片的订购/签约关系等。
步骤605：完成网络切片删除流程。
在本实施例中，不同的网络业务功能对应不同的网络切片，避免了各种业务之间的相互影响，网络稳定性更高。端到端的统一切片管理和编排功能可以灵活快捷的维护网络切片，不同Slice所在的网络切片相互隔离。
在上述实施例的基础上，参见图7，图7为本公开的实施例的更新网络切片的流程图。Slice-ID不变，对应的网络切片控制面功能ID或Group-ID改变(更新网络切片控制面功能ID或网络切片控制面功能的Group-ID)。
Figure PCTCN2017091580-appb-000002
络切片更新，切片标识Slice-ID对应的网络切片控制面功能需要修改时，需要执行相应的流程告知切片选择控制功能实体，及时修改切片选择控制功能实体、RAN中的切片对应关系或切片标识Slice-ID，更新网络切片控制面功能与Slice-ID的对应关系，图7具体包括步骤701至步骤706。
步骤701：旧切片删除或配置新的网络切片标识Slice-ID，新的切片分配对应新的网络切片控制面功能ID或Group-ID对应原有的Slice-ID。
步骤702：端到端的切片管理和编排更新原有Slice-ID和新切片控制面功能ID或Group-ID的对应关系。
步骤703：切片选择功能配置向切片选择控制功能实体下发对应关系。
步骤704：切片选择控制功能实体更新新的对应关系(Slice-ID对应新的切片控制面功能ID或Group-ID)。
步骤705：端到端切片管理和编排告知签约数据库(DATA)更改用户的订购/签约关系。
步骤706：网络切片更新完成。
参见图8，图8为本公开的实施例的更新网络切片的流程图。当网络切片更新，原有的切片标识Slice-ID对应的新的网络切片，旧的网络切片需要分配新的Slice-ID，需执行相应的流程告知切片选择控制功能实体，及时修改切片选择控制功能实体、RAN中的切片对应关系或切片标识Slice-ID，更新网络切片控制面功能与Slice-ID的对应关系，图8具体包括步骤801至步骤806。
步骤801：旧切片删除或配置新的网络切片标识Slice-ID。
步骤802：端到端的切片管理和编排更新原有Slice-ID和新切片控制面功能ID或Group-ID的对应关系。
步骤803：切片选择功能配置向切片选择控制功能实体下发对应关系。
步骤804：切片选择功能更新新的对应关系(Slice-ID对应新的切片控制面功能ID或Group-ID)。
步骤805：端到端切片管理和编排告知签约数据库(DATA)更改用户的订购/签约关系。
步骤806：网络切片更新完成。
需要说明的是，切片选择功能配置模块和网元管理模块可以是单独的两个网络功能，也可以是合在一起的单个网络功能，类似相关网管。
需要说明的是，切片选择功能配置模块也可以是端到端管理功能中的一个功能，对切片选择功能的配置由端到端管理功能实现。
参见图9，图9为本公开的实施例的切片选择控制功能实体的框图。所述切片选择控制功能实体900包括第一接收模块901和第一确定模块902。
第一接收模块901用于获取切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项。
第一确定模块902用于根据所述切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定网络切片选择信息，并将确定的网络切片选择信息发送给所述切片路由功能实体，以使所述切片路由功能实体执行信令或数据路由。
可选地，第一接收模块901具体用于接收切片路由功能实体或接入网发送的附着请求，所述附着请求中携带有网络切片选择协助参数和/或用户上下文。
可选地，第一接收模块901具体用于从5G策略网络功能实体中获取切片选择策略。
可选地，第一接收模块901具体用于从签约数据库DATA中获取用户签约信息。
可选地，在本实施例中，所述切片路由功能实体位于接入网、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体结合，切片选择控制功能实体位于接入网或者位于核心网或者是一个独立于接入网和核心网的网络功能实体。
可选地，在本实施例中，所述网络切片选择协助参数为网络切片标识、业务类型、网络切片描述符号、终端使用类型和租户标识中的任意一种。
可选地，所述网络切片标识包括网络切片类型标识和/或网络切片实例标 识。
上述网络切片标识可以包括两部分，一部分是网络切片类型标识(例如标识增强型移动宽带(eMBB)切片、物联网(Internet of Things(IoT))切片)，一部分是网络切片实例标识(一类网络切片可能有多个实体，例如eMBB切片可能有多个实例化实体)。
需要说明的是，在本实施例中，网络切片标识包括网络切片类型标识和网络切片实例标识。在漫游场景中，核心网可以基于网络切片标识构建完全合格域名/全称域名(Fully Qualified Domain Name(FQDN))找到相应的网络切片或对应的网络切片控制面功能，上述切片类型标识(slice type)可以用来在用户漫游时确定用户的运营商(例如中国移动、中国联通或中国电信)以及确定网络类型(例如4G、3G等)，然后根据切片类型标识选择对应的公共陆地移动网络(Public Land Mobile Network(PLMN))后，拜访地运营商可根据网络切片实例标识将用户接入对应该网络切片实例标识(instance id)的网络切片。
可选地，在本实施例中，所述网络切片选择信息为用户访问的网络切片的控制面功能标识或控制面功能的集合标识。
在需要进行网络切片选择时，可以基于网络切片标识或业务类型灵活的选择网络切片，不需要具体的去配置网络切片的端口。而且不同的网络业务功能对应不同的网络切片，避免了各种业务之间的相互影响，网络稳定性更高。切片选择控制功能实体与网络切片之间不存在信令交互，减少了网络切片的对外接口数目。
参见图10，图10为本公开的实施例的网络切片选择设备的框图。该设备可以是切片路由功能实体或者接入网侧设备，所述设备1000包括第二接收模块1001和第一处理模块1002。
第二接收模块1001用于切片选择控制功能实体发送的网络切片选择信息，所述网络切片选择信息由所述切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定。
第一处理模块1002用于根据所述网络切片选择信息执行信令或数据路由。
可选地，在本实施例中，所述切片路由功能实体还包括第一发送模块，第一发送模块用于将网络切片标识发送给终端，以使所述终端根据接收到的网络切片标识更新存储的网络切片标识。
可选地，在本实施例中，所述网络切片选择协助参数和/或用户上下文是由所述切片选择控制功能实体从接收到的附着请求(来自切片路由功能实体或接入网)中获取的。
所述切片选择策略是由所述切片选择控制功能实体从5G策略网络功能实体中获取的。
所述用户签约信息是由所述切片选择控制功能实体从签约数据库中获取。
可选地，在本实施例中，所述切片路由功能实体位于接入网、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体结合。所述切片选择控制功能实体位于接入网或者位于核心网或者是一个独立于接入网和核心网的网络功能实体。
可选地，在本实施例中，所述网络切片选择协助参数为网络切片标识、业务类型、网络切片描述符号、终端使用类型和租户标识中的任意一种。
可选地，所述网络切片标识包括网络切片类型标识和/或网络切片实例标识。
上述网络切片标识可以包括两部分，一部分是网络切片类型标识(例如标识增强型移动宽带(eMBB)切片、物联网(Internet of Things(IoT))切片)，一部分是网络切片实例标识(一类网络切片可能有多个实体，例如eMBB切片可能有多个实例化实体)。
需要说明的是，在本实施例中，网络切片标识包括网络切片类型标识和网络切片实例标识，在漫游场景中，核心网可以基于网络切片标识构建完全合格域名/全称域名(Fully Qualified Domain Name(FQDN))找到相应的网络切片或对应的网络切片控制面功能。上述切片类型标识(slice type)可以用来在用户漫游时，确定用户的运营商(例如中国移动、中国联通或中国电信)以及确定网络类型(例如4G、3G等)，然后根据切片类型标识选择对应的公共陆地移动网络(Public Land Mobile Network(PLMN))后，拜访地运营商可根据网络切片实例标识将用户接入对应该网络切片实例标识(instance  id)的网络切片。
可选地，在本实施例中，所述网络切片选择信息为用户访问的网络切片的控制面功能标识或控制面功能的集合标识。
可选地，所述网络切片的控制面功能标识或控制面功能的集合标识与所述网络切片的网络切片标识对应。
可选地，在本实施例中，所述切片路由功能实体还包括存储模块，存储模块用于从所述切片选择控制功能实体获得网络切片选择对应关系表，所述网络切片选择对应关系表中记录有网络切片选择协助参数或网络切片标识与网络切片选择信息的对应关系。
可选地，在本实施例中，所述切片路由功能实体还包括：第三接收模块，用于接收附着请求；第二确定模块，用于根据网络切片选择对应关系表和所述附着请求，确定网络切片选择信息；第二处理模块，用于根据所述网络切片选择信息执行信令或数据路由。
可选地，在本实施例中，所述切片路由功能实体还包括：第四接收模块，用于若需要对所述网络切片选择对应关系表进行更新时，所述切片路由功能实体从所述切片选择控制功能实体获得新的网络切片选择协助参数与网络切片选择信息的对应关系；以及更新模块，用于利用新的网络切片选择协助参数与网络切片选择信息的对应关系对所述网络切片选择对应关系表进行更新。
可选地，所述切片路由功能实体还包括：重新发送模块，用于若接收到附着错误的信息，重新将网络切片选择协助参数发送给切片选择控制功能实体，以获取正确的切片选择结果。
在需要进行网络切片选择时，可以基于网络切片标识或业务类型灵活的选择网络切片，不需要具体的去配置网络切片的端口。而且不同的网络业务功能对应不同的网络切片，避免了各种业务之间的相互影响，网络稳定性更高。切片选择控制功能实体与网络切片之间不存在信令交互，减少了网络切片的对外接口数目。进一步地，RAN侧可存储网络切片选择对应关系表，直接查网络切片选择对应关系表获取网络切片选择信息，避免UE多次接入网络切片时需要重复访问切片选择功能获取网络切片选择信息。
参见图11，图11为本公开的实施例的网络切片选择方法的流程图。图 11所示的方法包括步骤1101至步骤1103。
步骤1101：获取网络切片标识，所述网络切片标识包括网络切片类型标识和网络切片实例标识。
上述网络切片标识可以包括两部分，一部分是网络切片类型标识(例如标识增强型移动宽带(eMBB)切片、物联网(Internet of Things(IoT))切片)，一部分是网络切片实例标识(一类网络切片可能有多个实体，例如eMBB切片可能有多个实例化实体)。
步骤1102：根据所述网络切片类型标识标识对应的公共陆地移动网络PLMN。
可选地，根据所述网络切片类型标识确定运营商和网络类型；根据确定的运营商和网络类型标识对应的PLMN。
步骤1103：根据网络切片实例标识将用户接入对应网络切片实例标识的网络切片。
在漫游场景中，核心网可以基于网络切片标识构建完全合格域名/全称域名(Fully Qualified Domain Name(FQDN))找到相应的网络切片或对应的网络切片控制面功能。上述切片类型标识(slice type)可以用来在用户漫游时，确定用户的运营商(例如中国移动、中国联通或中国电信)以及确定网络类型(例如4G、3G等)，然后根据切片类型标识标识对应的公共陆地移动网络(Public Land Mobile Network(PLMN))，拜访地运营商可根据网络切片实例标识将用户接入对应该网络切片实例标识(instance id)的网络切片。
参见图12，图12示出本公开的实施例的网络切片选择设备的框图。设备1200包括：获取模块1201，用于获取网络切片标识，所述网络切片标识包括网络切片类型标识和网络切片实例标识；选择模块1202，用于根据所述网络切片类型标识标识对应的公共陆地移动网络PLMN；接入模块1203，用于根据所述网络切片实例标识将用户接入对应所述网络切片实例标识的网络切片。
可选地，所述选择模块进一步用于根据所述网络切片类型标识确定运营商和网络类型，根据确定的运营商和网络类型标识对应的PLMN。
在漫游场景中，核心网可以基于网络切片标识构建完全合格域名/全称域 名(Fully Qualified Domain Name(FQDN))找到相应的网络切片或对应的网络切片控制面功能。上述切片类型标识(slice type)可以用来在用户漫游时，确定用户的运营商(例如中国移动、中国联通或中国电信)以及确定网络类型(例如4G、3G等)，然后根据切片类型标识标识对应的公共陆地移动网络(Public Land Mobile Network(PLMN))，拜访地运营商可根据网络切片实例标识将用户接入对应该网络切片实例标识(instance id)的网络切片。
在本公开中还提供了一种网络切片选择方法。所述方法包括步骤1301和步骤1302。
步骤1301：若终端携带的消息中不存在网络切片选择协助参数的字段，切片路由功能实体或接入网侧设备将所终端携带的消息发给切片选择控制功能实体，以使所述切片选择控制功能实体为所述终端选择一个合适的网络切片并发送给所述切片路由功能实体或接入网侧设备。
步骤1302：所述切片路由功能实体或接入网侧设备向所终端发送所述切片路由功能实体或接入网侧设备选择的网络切片的网络切片标识，由所述终端重新发起附着请求。
在本公开中，还提供了一种网络切片选择设备。所述设备包括：第二发送模块，用于若终端携带的消息中不存在网络切片选择协助参数的字段，将所终端携带的消息发给切片选择控制功能实体，以使所述切片选择控制功能实体为所述终端选择一个合适的网络切片并发送给所述切片路由功能实体或接入网侧设备；第三处理模块，用于向所终端发送所述切片路由功能实体或接入网侧设备选择的网络切片的网络切片标识，由所述终端重新发起附着请求。
在本公开中，还提供了一种网络切片选择方法。所述方法包括步骤1401和步骤1402。
步骤1401：端到端切片管理和编排功能实体发送控制指令，所述控制指令为添加新的网络切片的指令、删除网络切片的指令和更新网络切片标识的指令中的任意一种。
步骤1402：端到端切片管理和编排功能实体向切片选择控制功能实体发送更新对应关系消息，以使所述切片选择控制功能实体更新网络切片标识和 网络切片的控制面功能标识或网络切片的控制面功能的集合标识的对应关系。
在本公开中，还提供了一种网络切片选择设备。所述设备包括：第三发送模块，用于发送控制指令，所述控制指令为添加新的网络切片的指令、删除网络切片的指令和更新网络切片标识的指令中的任意一种；第四发送模块，用于向切片选择控制功能实体发送更新对应关系消息，以使所述切片选择控制功能实体更新网络切片标识和网络切片的控制面功能标识或网络切片的控制面功能的集合标识的对应关系。
在本公开中还提供了一种网络架构，该网络架构包括如上所述的网络切片选择的设备。
应理解，说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本公开的至少一个实施例中。因此，在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一项或多项实施例中。
在本公开的各种实施例中，应理解，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，而不应对本公开实施例的实施过程构成任何限定
另外，本文中术语“系统”和“网络”在本文中常可互换使用。
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。
在本申请所提供的实施例中，应理解，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
在本申请所提供的几个实施例中，应该理解到，所揭露方法和装置，可以通过其它的方式实现。例如，以上所描述的设备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。
另外，在本公开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包括，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元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)执行本公开各个实施例所述收发方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述的是本公开的可选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本公开所述的原理前提下还可以做出若干改进和润饰，这些改进和润饰也在本公开的保护范围内。

Claims (50)

  1. 一种网络切片选择方法，包括：
    切片选择控制功能实体获取切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项；
    所述切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定网络切片选择信息，并将确定的所述网络切片选择信息发送给切片路由功能实体或者接入网侧设备，以使所述切片路由功能实体或者接入网侧设备执行信令或数据路由。
  2. 根据权利要求1所述的方法，其中，所述切片选择控制功能实体获取网络切片选择协助参数和/或用户上下文的方式为：所述切片选择控制功能实体接收切片路由功能实体或接入网发送的附着请求，所述附着请求中携带有网络切片选择协助参数和/或用户上下文；
    所述切片选择控制功能实体获取切片选择策略的方式为：所述切片选择控制功能实体从第五代移动通信网5G策略网络功能实体中获取切片选择策略；
    所述切片选择控制功能实体获取用户签约信息的方式为：所述切片选择控制功能实体从签约数据库中获取用户签约信息。
  3. 根据权利要求1或2所述的方法，其中，所述切片路由功能实体位于接入网、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体合并，所述切片选择控制功能实体位于接入网或者位于核心网或者是一个独立于接入网和核心网的网络功能实体。
  4. 根据权利要求1所述的方法，其中，所述网络切片选择协助参数为网络切片标识、业务类型、网络切片描述符号、终端使用类型和租户标识中的一项或多项。
  5. 根据权利要求4所述的方法，其中，所述网络切片标识包括网络切片类型标识和/或网络切片实例标识。
  6. 根据权利要求1所述的方法，其中，所述网络切片选择信息为用户访问的网络切片的控制面功能标识或控制面功能的集合标识。
  7. 根据权利要求6所述的方法，其中，所述网络切片的控制面功能标识或控制面功能的集合标识与所述网络切片的网络切片标识对应。
  8. 一种网络切片选择方法，包括：
    切片路由功能实体或接入网侧设备接收切片选择控制功能实体发送的网络切片选择信息，所述网络切片选择信息由所述切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定；
    所述切片路由功能实体或接入网侧设备根据所述网络切片选择信息执行信令或数据路由。
  9. 根据权利要求8所述的方法，还包括：
    所述切片路由功能实体或接入网侧设备将网络切片标识发送给终端，以使所述终端根据接收到的网络切片标识更新存储的网络切片标识。
  10. 根据权利要求8所述的方法，其中，
    所述网络切片选择协助参数和/或用户上下文是由所述切片选择控制功能实体从接收到的附着请求中获取的；
    所述切片选择策略是由所述切片选择控制功能实体从第五代移动通信5G策略网络功能实体中获取的；
    所述用户签约信息是由所述切片选择控制功能实体从签约数据库中获取。
  11. 根据权利要求8所述的方法，其中，所述切片路由功能实体位于接入网、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体合并，所述切片选择控制功能实体位于接入网或者位于核心网或者是一个独立于接入网和核心网的网络功能实体。
  12. 根据权利要求8所述的方法，其中，所述网络切片选择协助参数为网络切片标识、业务类型和网络切片描述符号、终端使用类型和租户标识中的一项或多项。
  13. 根据权利要求12所述的方法，其中，所述网络切片标识包括：网络切片类型标识和/或网络切片实例标识。
  14. 根据权利要求8所述的方法，其中，所述网络切片选择信息为用户访问的网络切片的控制面功能标识或控制面功能的集合标识。
  15. 根据权利要求14所述的方法，其中，所述网络切片的控制面功能标识或控制面功能的集合标识与所述网络切片的网络切片标识对应。
  16. 根据权利要求8所述的方法，还包括：
    所述切片路由功能实体或接入网侧设备从所述切片选择控制功能实体获得网络切片选择对应关系表，所述网络切片选择对应关系表中记录有网络切片选择协助参数或网络切片标识与网络切片选择信息的对应关系。
  17. 根据权利要求16所述的方法，还包括：
    所述切片路由功能实体或接入网侧设备接收附着请求，所述附着请求中携带有网络切片选择协助参数；
    所述切片路由功能实体或接入网侧设备根据所述网络切片选择对应关系表和所述网络切片选择协助参数，确定网络切片选择信息；
    所述切片路由功能实体或接入网侧设备根据所述网络切片选择信息执行信令或数据路由。
  18. 根据权利要求16所述的方法，还包括：
    所述切片路由功能实体或接入网侧设备从所述切片选择控制功能实体获得新的网络切片选择协助参数与网络切片选择信息的对应关系；
    所述切片路由功能实体或接入网侧设备利用新的网络切片选择协助参数与网络切片选择信息的对应关系对所述网络切片选择对应关系表进行更新。
  19. 根据权利要求16所述的方法，还包括：
    若所述切片路由功能实体或接入网侧设备接收到附着错误的信息，所述切片路由功能实体或接入网侧设备重新将所述网络切片选择协助参数发送给所述切片选择控制功能实体，以获取正确的网络切片选择信息。
  20. 根据权利要求8所述的方法，其中，所述切片路由功能实体或接入网侧设备具有识别终端是否支持网络切片的能力。
  21. 根据权利要求20所述的方法，其中，若所述终端不支持网络切片，所述终端携带的消息中不存在网络切片选择协助参数的字段，所述切片路由功能实体或接入网侧设备将信令转给所述切片选择控制功能实体，以使所述切片选择控制功能实体告知所述终端接入一个网络切片或告知接入的网络切片的控制面功能；
    若所述终端支持网络切片，所述终端携带的消息中存在网络切片选择协助参数的字段，其中，字段为空NULL或携带有网络切片选择协助参数的描述。
  22. 根据权利要求8所述的方法，还包括：
    所述切片路由功能实体或接入网侧设备将用户路由到对应网络切片上，由选中的网络切片控制面功能执行用户接入网络切片的鉴权和授权流程。
  23. 根据权利要求22所述的方法，其中，由选中的网络切片控制面功能执行用户接入网络切片的鉴权和授权流程，包括：
    当网络切片的控制面功能发起鉴权请求时，签约数据库反馈网络切片控制面功能当前公共陆地移动网络PLMN下用户的签约信息，网络切片控制面功能根据签约信息确定用户是否可以接入选中的控制面网络功能，完成用户接入网络切片的鉴权和授权。
  24. 一种切片选择控制功能实体，包括：
    第一接收模块，用于获取切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项；
    第一确定模块，用于根据所述切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定网络切片选择信息，并将确定的所述网络切片选择信息发送给所述切片路由功能实体，以使所述切片路由功能实体执行信令或数据路由。
  25. 根据权利要求24所述的切片选择控制功能实体，其中，所述第一接收模块，具体用于接收切片路由功能实体或接入网发送的附着请求，所述附着请求中携带有网络切片选择协助参数和/或用户上下文；
    所述第一接收模块，具体用于从第五代移动通信5G策略网络功能实体中获取切片选择策略；
    所述第一接收模块，具体用于从签约数据库中获取用户签约信息。
  26. 根据权利要求24所述的切片选择控制功能实体，其中，所述切片路由功能实体位于接入网、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体合并，切片选择控制功能实体位于接入网或者位于核心网或者是一个独立于接入网和核心网的网络功能实体。
  27. 根据权利要求24所述的切片选择控制功能实体，其中，所述网络切片选择协助参数为网络切片标识、业务类型、网络切片描述符号、终端使用类型和租户标识中的一项或多项。
  28. 根据权利要求24所述的切片选择控制功能实体，其中，所述网络切片标识包括：网络切片类型标识和/或网络切片实例标识。
  29. 根据权利要求24所述的切片选择控制功能实体，其中，所述网络切片选择信息为用户访问的网络切片的控制面功能标识或控制面功能的集合标识。
  30. 一种网络切片选择设备，包括：
    第二接收模块，用于接收切片选择控制功能实体发送的网络切片选择信息，所述网络切片选择信息由所述切片选择控制功能实体根据切片选择策略、用户签约信息、网络切片选择协助参数和用户上下文中的一项或多项确定；
    第一处理模块，用于根据所述网络切片选择信息执行信令或数据路由。
  31. 根据权利要求30所述的设备，还包括：
    第一发送模块，用于将网络切片标识发送给终端，以使所述终端根据接收到的网络切片标识更新存储的网络切片标识。
  32. 根据权利要求30所述的设备，其中，
    所述网络切片选择协助参数和/或用户上下文是由所述切片选择控制功能实体从接收到的附着请求中获取；
    所述切片选择策略是由所述切片选择控制功能实体从5G策略网络功能实体中获取；
    所述用户签约信息是由所述切片选择控制功能实体从签约数据库中获取。
  33. 根据权利要求30所述的设备，其中，所述设备为切片路由功能实体，所述切片路由功能实体位于接入网、或者位于核心网、或者位于核心网和接入网之间、或者与切片选择控制功能实体合并，所述切片选择控制功能实体位于接入网或者位于核心网或者是一个独立于接入网和核心网的网络功能实体。
  34. 根据权利要求30所述的设备，其中，所述网络切片选择协助参数为网络切片标识、业务类型、网络切片描述符号、终端使用类型和租户标识中 的一项或多项。
  35. 根据权利要求34所述的设备，其中，所述网络切片标识包括：网络切片类型标识和/或网络切片实例标识。
  36. 根据权利要求30所述的设备，其中，所述网络切片选择信息为用户访问的网络切片的控制面功能标识或控制面功能的集合标识。
  37. 根据权利要求36所述的设备，其中，所述网络切片的控制面功能标识或控制面功能的集合标识与所述网络切片的网络切片标识对应。
  38. 根据权利要求30所述的设备，还包括：
    存储模块，用于从所述切片选择控制功能实体获得网络切片选择对应关系表，所述网络切片选择对应关系表中记录有网络切片选择协助参数或网络切片标识与网络切片选择信息的对应关系。
  39. 根据权利要求38所述的设备，还包括：
    第三接收模块，用于接收附着请求，所述附着请求中携带有网络切片选择协助参数；
    第二确定模块，用于根据网络切片选择对应关系表和所述网络切片选择协助参数，确定网络切片选择信息；
    第二处理模块，用于根据所述网络切片选择信息执行信令或数据路由。
  40. 根据权利要求39所述的设备，还包括：
    第四接收模块，用于从所述切片选择控制功能实体获得新的网络切片选择协助参数与网络切片选择信息的对应关系；
    更新模块，用于利用新的网络切片选择协助参数与网络切片选择信息的对应关系对所述网络切片选择对应关系表进行更新。
  41. 根据权利要求38所述的设备，还包括：
    重新发送模块，用于若接收到附着错误的信息，重新将网络切片选择协助参数发送给切片选择控制功能实体，以获取正确的切片选择结果。
  42. 一种网络切片选择方法，该方法适用于漫游场景并且包括：
    获取网络切片标识，所述网络切片标识包括网络切片类型标识和网络切片实例标识；
    根据所述网络切片类型标识标识对应的公共陆地移动网络PLMN；
    根据所述网络切片实例标识将用户接入对应所述网络切片实例标识的网络切片。
  43. 根据权利要求42所述的方法，其中，根据所述网络切片类型标识标识对应的公共陆地移动网络PLMN，包括：
    根据所述网络切片类型标识确定运营商和网络类型；
    根据确定的运营商和网络类型选择对应的PLMN。
  44. 一种网络切片选择设备，包括：
    获取模块，用于获取网络切片标识，所述网络切片标识包括网络切片类型标识和网络切片实例标识；
    选择模块，用于根据所述网络切片类型标识标识对应的公共陆地移动网络PLMN；
    接入模块，用于根据所述网络切片实例标识将用户接入对应所述网络切片实例标识的网络切片。
  45. 根据权利要求44所述的设备，其中，所述选择模块进一步用于根据所述网络切片类型标识确定运营商和网络类型；根据确定的运营商和网络类型选择对应的PLMN。
  46. 一种网络切片选择方法，包括：
    若终端携带的消息中不存在网络切片选择协助参数的字段，切片路由功能实体或接入网侧设备将所终端携带的消息发给切片选择控制功能实体，以使所述切片选择控制功能实体为所述终端选择一个合适的网络切片并发送给所述切片路由功能实体或接入网侧设备；
    所述切片路由功能实体或接入网侧设备向所终端发送所述切片路由功能实体或接入网侧设备选择的网络切片的网络切片标识，由所述终端重新发起附着请求。
  47. 一种网络切片选择设备，包括：
    第二发送模块，用于若终端携带的消息中不存在网络切片选择协助参数的字段，将所终端携带的消息发给切片选择控制功能实体，以使所述切片选择控制功能实体为所述终端选择一个合适的网络切片并发送给所述切片路由功能实体或接入网侧设备；
    第三处理模块，用于向所终端发送所述切片路由功能实体或接入网侧设备选择的网络切片的网络切片标识，由所述终端重新发起附着请求。
  48. 一种网络切片选择方法，包括：端到端切片管理和编排功能实体发送控制指令，所述控制指令为添加新的网络切片的指令、删除网络切片的指令和更新网络切片标识的指令中的任意一种；
    所述端到端切片管理和编排功能实体向切片选择控制功能实体发送更新对应关系消息，以使所述切片选择控制功能实体更新网络切片标识和网络切片的控制面功能标识或网络切片的控制面功能的集合标识的对应关系。
  49. 一种网络切片选择设备，包括：
    第三发送模块，用于发送控制指令，所述控制指令为添加新的网络切片的指令、删除网络切片的指令和更新网络切片标识的指令中的任意一种；
    第四发送模块，用于向切片选择控制功能实体发送更新对应关系消息，以使所述切片选择控制功能实体更新网络切片标识和网络切片的控制面功能标识或网络切片的控制面功能的集合标识的对应关系。
  50. 一种系统，包括：
    如权利要求24～29所述的切片选择控制功能实体，或者
    如权利要求30～41所述的网络切片选择设备，或者
    如权利要求44～45所述的网络切片选择设备，或者
    如权利要求47所述的网络切片选择设备，或者
    如权利要求49所述的网络切片选择设备。
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