WO2018153346A1 - 一种网络切片的选择方法及装置 - Google Patents

一种网络切片的选择方法及装置 Download PDF

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Publication number
WO2018153346A1
WO2018153346A1 PCT/CN2018/076979 CN2018076979W WO2018153346A1 WO 2018153346 A1 WO2018153346 A1 WO 2018153346A1 CN 2018076979 W CN2018076979 W CN 2018076979W WO 2018153346 A1 WO2018153346 A1 WO 2018153346A1
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WIPO (PCT)
Prior art keywords
terminal device
slice
information
network
network slice
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PCT/CN2018/076979
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English (en)
French (fr)
Inventor
张春蕾
周光超
陈恒
周志勇
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP18758268.9A priority Critical patent/EP3528519B1/en
Publication of WO2018153346A1 publication Critical patent/WO2018153346A1/zh
Priority to US16/426,957 priority patent/US11368904B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • 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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/17—Selecting a data network PoA [Point of Attachment]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • 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
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/654—International mobile subscriber identity [IMSI] numbers

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method and an apparatus for selecting a network slice.
  • the fifth generation mobile communication technology (5G) system proposes a network slicing concept.
  • a network slice satisfies the connection communication service requirements of a certain class or a use case.
  • the entire 5G system is composed of a large number of network slices satisfying different connection capabilities.
  • connection communication services In order to meet the different scenarios of various industries, operators need to provide connection communication services with different functions and QoS.
  • the virtualization technology In order to reduce the complexity of the technology implementation, shorten the time to market, and enhance the innovation capability, the virtualization technology is used to slice the entire network resources, so that communication services with different connection capabilities are deployed on different network slices to enable specific connection capabilities. Technical decoupling between communication services.
  • SSF logical network element slice selection function entity
  • RAN Node requests the SSF to allocate a network slice to the UE based on the request of the UE, so that the SSF selects a network slice for the UE after receiving the request of the UE.
  • the SSF needs to perform network connection with multiple radio access network nodes, thereby increasing the signaling transmission burden on the network side.
  • the present invention provides a method and a device for selecting a network slice to solve the problem of large transmission burden on the network side existing in the prior art.
  • an embodiment of the present application provides a method for selecting a network slice, including:
  • the core network device Receiving, by the core network device, a first request message sent by the terminal device, where the first request message is used to request to allocate, to the terminal device, a network slice that provides a service service; and the core network device sends a query to the slice selection function entity SSF a message, the query message carries the user information of the terminal device, and is used to query a network slice that can provide a service service for the terminal device; the core network device receives the information determined by the SSF and is determined based on the user information. After the slice information of the network slice of the service service required by the terminal device is provided, the first request message is forwarded to the network slice corresponding to the slice information, so that the network slice corresponding to the slice information is the terminal device Provide business services. As shown in the above manner, the SSF no longer needs to be connected to multiple access network devices, thereby reducing signaling transmission between the SSF and the access network device, and saving transmission resource occupation.
  • the user information of the terminal device includes at least one of the following information:
  • An international mobile subscriber identity IMSI of the terminal device An international mobile subscriber identity IMSI of the terminal device
  • the service type of the terminal device is the service type of the terminal device
  • the international mobile device identity code IMEI of the terminal device is the international mobile device identity code IMEI of the terminal device.
  • the foregoing user information is carried in the query message, so that the SSF selects a network slice for the user based on the user information.
  • the method further includes:
  • the core network device After receiving the first request message to the network slice corresponding to the slice information, the core network device receives the identifier information of the network slice sent by the network slice;
  • the core network device sends the identifier information of the network slice to the terminal device.
  • the network slice sends its own identification information to the core network device, and is forwarded by the core network device to the terminal device, so that the terminal device knows the network slice suitable for itself, so that the next request is directly requested during the next attachment or service request.
  • the signaling transmission between the core network device and the SSF is reduced, and the transmission resource is saved.
  • the method further includes:
  • the core network device forwards the second request message to the network slice corresponding to the identifier information of the network slice, so that the network slice corresponding to the identifier information provides a service service for the terminal device.
  • the terminal device receives the identifier information of the network slice sent by the core network device, and the terminal device knows the network slice that is suitable for the terminal device, so as to directly request access to the network slice when the next attachment or service request is performed, thereby reducing the The signaling transmission between the core network device and the SSF saves transmission resources.
  • the slice information includes at least one of the following information:
  • the identification information of the network slice the type of the network slice, and the address information of the network slice.
  • the method may further include:
  • the core network device After receiving the first request message to the network slice corresponding to the slice information, the core network device receives the identifier information of the network slice sent by the network slice;
  • the core network device stores a correspondence between the terminal device and the identifier information of the network slice.
  • the core network device receives the identifier information of the network slice sent by the network slice, so as to determine a network slice matching the terminal device, so that the identifier between the terminal device and the network slice can be saved.
  • the network slice may be selected for the terminal device based on the corresponding relationship, thereby reducing signaling transmission between the core network device and the SSF, and reducing the occupation of the transmission resource.
  • the method may further include:
  • the core network device After receiving the request message sent by the terminal device, the core network device determines that the slice identifier of the network slice corresponding to the terminal device is saved in the corresponding relationship, and no longer needs to query the SSF for the network slice that satisfies the terminal device. Therefore, the signaling transmission between the core network device and the SSF is reduced, and the occupied transmission resources are occupied.
  • an embodiment of the present application provides a method for selecting a network slice, including:
  • the slice selection function entity SSF receives the query message sent by the core network device, where the query message carries the user information of the terminal device, and is used to query the network slice that provides the service service for the terminal device;
  • the SSF determines the slice information of the network slice corresponding to the user information of the terminal device according to the mapping relationship, and sends the slice information to the core network device, where the mapping relationship is used to describe user information of different terminal devices. Correspondence between slice information of different network slices.
  • the SSF only needs to be connected with the core network device, and no longer needs to be connected with multiple access network devices, thereby reducing signaling transmission between the SSF and the access network device, thereby saving The occupation of transmission resources.
  • the user information of the terminal device includes at least one of the following information:
  • An international mobile subscriber identity IMSI of the terminal device An international mobile subscriber identity IMSI of the terminal device
  • the service type of the terminal device is the service type of the terminal device
  • the international mobile device identity code IMEI of the terminal device is the international mobile device identity code IMEI of the terminal device.
  • the embodiment of the present application provides a network slice selection apparatus, including:
  • a receiving unit configured to receive a first request message sent by the terminal device, where the first request message is used to request to allocate, to the terminal device, a network slice that provides a service service;
  • a sending unit configured to send a query message to the slice selection function entity SSF, where the query message carries the user information of the terminal device, and is used to query a network slice that can provide a service service for the terminal device;
  • the receiving unit is further configured to receive, according to the user information, the slice information of the network slice that is determined by the SSF and that can provide the service service required by the terminal device;
  • the sending unit is further configured to: after the receiving unit receives the slice information, forward the first request message to a network slice corresponding to the slice information, so that the network slice corresponding to the slice information is The terminal device provides a service service.
  • the user information of the terminal device includes at least one of the following information:
  • An international mobile subscriber identity IMSI of the terminal device An international mobile subscriber identity IMSI of the terminal device
  • the service type of the terminal device is the service type of the terminal device
  • the international mobile device identity code IMEI of the terminal device is the international mobile device identity code IMEI of the terminal device.
  • the receiving unit is further configured to: after the sending unit forwards the first request message to a network slice corresponding to the slice information, receive the network sent by the network slice Identification information of the slice;
  • the sending unit is further configured to send the identifier information of the network slice to the terminal device.
  • the receiving unit is further configured to: after the sending unit sends the identifier information of the network slice to the terminal device, receive a second request message sent by the terminal device, where The second request message carries the identifier information of the network slice;
  • the sending unit is further configured to forward the second request message that is received by the receiving unit to a network slice corresponding to the identifier information of the network slice, so that the network slice corresponding to the identifier information is the terminal
  • the device provides business services.
  • the slice information includes at least one of the following information:
  • the identification information of the network slice the type of the network slice, and the address information of the network slice.
  • the embodiment of the present application further provides a device for selecting a network slice, including:
  • a receiving unit configured to receive a query message sent by the core network device, where the query message carries user information of the terminal device, and is used to query a network slice that provides a service service for the terminal device;
  • a processing unit configured to determine, according to a mapping relationship, slice information of a network slice corresponding to the user information of the terminal device, where the mapping relationship is used to describe a correspondence between user information of different terminal devices and slice information of different network slices ;
  • the user information of the terminal device includes at least one of the following information:
  • An international mobile subscriber identity IMSI of the terminal device An international mobile subscriber identity IMSI of the terminal device
  • the service type of the terminal device is the service type of the terminal device
  • the international mobile device identity code IMEI of the terminal device is the international mobile device identity code IMEI of the terminal device.
  • the embodiment of the present application further provides a network slice selection device applied to a core network device, where the device includes:
  • the memory is used to store program code executed by the processor.
  • the processor transmits and receives data through a communication interface, specifically for executing program code stored in the memory, and implements the method described in any one of the first aspect or the first aspect.
  • the embodiment of the present application further provides a network slice selection device applied to an SSF, where the device includes:
  • the memory is used to store program code executed by the processor.
  • the processor transmits and receives data through a communication interface, specifically for executing program code stored in the memory, and implements the method described in any one of the second aspect or the second aspect.
  • the embodiment of the present application further provides a computer storage medium, where the software program stores a software program, where the software program can implement the first aspect or the first one when being read and executed by one or more processors.
  • the software program stores a software program, where the software program can implement the first aspect or the first one when being read and executed by one or more processors.
  • the core network device After receiving the first request message sent by the terminal device, the core network device sends a query message to the SSF, where the query message is used to query a network slice corresponding to the service required by the terminal device; After receiving the slice information of the network slice corresponding to the service required by the terminal device, the core network device forwards the first request message to the network slice corresponding to the slice information, so that the slice The network slice corresponding to the information provides a service service for the terminal device.
  • the SSF does not need to be connected to each access network device, and does not need to be connected to multiple network slices. It only needs to be connected with the above-mentioned core network device, thereby reducing signaling transmission and reducing The occupation of resources.
  • FIG. 1 is a schematic diagram of a network architecture of a network slice that meets different service requirements according to an embodiment of the present application
  • FIG. 2A is a schematic diagram of a completely independent slice provided by an embodiment of the present application.
  • 2B is a schematic diagram of a RAN shared slice provided by an embodiment of the present application.
  • 2C is a schematic diagram of a CP shared slice provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a network architecture of an SSF connected to a RAN node according to an embodiment of the present disclosure
  • FIG. 4A is a schematic diagram of a network architecture applied to a RAN shared slice scenario according to an embodiment of the present disclosure
  • FIG. 4B is a schematic diagram of a network architecture applied to a CP shared slice scenario according to an embodiment of the present disclosure
  • FIG. 5 is a flowchart of a method for selecting a network slice according to an embodiment of the present application
  • FIG. 6 is a schematic flowchart of a method for selecting a network slice in a first attachment scenario of a terminal device according to an embodiment of the present disclosure
  • FIG. 7 is a schematic flowchart of a method for selecting a network slice in a scenario in which a terminal device is reattached or a service request is provided according to an embodiment of the present disclosure
  • FIG. 8 is a schematic flowchart of a method for selecting a network slice in a specific application scenario according to an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram of a device for selecting a network slice applied to a core network device according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of another apparatus for selecting a network slice applied to a core network device according to an embodiment of the present disclosure
  • FIG. 11 is a schematic diagram of a device for selecting a network slice applied to an SSF according to an embodiment of the present disclosure
  • FIG. 12 is a schematic diagram of another apparatus for selecting a network slice applied to an SSF according to an embodiment of the present disclosure.
  • Network slicing supports a specific connection type of communication service, and provides a control plane (English: Control Plane, CP for short) and user plane (English: User Plane, UP: UP) for this service. Processing method.
  • the mobile operator implements the configuration and management of hundreds of network slices through a series of network function configuration and orchestration on the control network of the core network (English: core network, referred to as CN) to support specific Use case or business model.
  • the network segmentation may involve a series of configuration and support of the network element between the end and the end, including user equipment (English: user equipment, abbreviated as: UE), access network (English: radio access network, RAN) .
  • Network slicing can be used to support specific applications and business models, providing only the necessary business processing, avoiding all other unnecessary functions, simplifying complexity, and shortening time-to-market; network slicing allows third parties to control network slicing to some extent.
  • network slicing also provides general management methods for network and network elements based on slice resources, such as deployment, expansion and expansion, and software upgrades.
  • slice resources such as deployment, expansion and expansion, and software upgrades.
  • the network slice shares the same with the traditional mobile virtual network operator (English: mobile virtual network operator, MVNO for short).
  • MVNO mobile virtual network operator
  • Different ways of network, network slicing uses virtualization technology to achieve isolation between different slices from resources, and virtualize multiple different networks according to diverse needs.
  • Network slicing will enable the isolation of network quality of service (English: Quality of Service, QoS for short), flexible network management and network efficiency, network administrators will be able to decompose according to end-to-end QoS requirements, mapping to different The sub-network system and the forwarding device simultaneously establish network slicing in a low-cost, high-rate manner, and do not affect existing services.
  • Network slicing can provide a partially flexible and programmable interface to third-party users, enabling third-party users to design and develop trusted network services based on open interfaces and achieve rapid deployment, bringing considerable economic benefits to operators while improving The efficiency of the use of existing networks.
  • 3GPP (English: the third generation partnership project, 3GPP) summarizes the typical scenarios of 5G into the following three types: as shown in Figure 1, the enhanced mobile broadband service (English: enhanced mobile broadband, referred to as eMBB), Massive machine type communication (English: massive machine type communication, referred to as: mMTC) and ultra-reliable and low latency communications (URLC), URLLC can also be called specific machine type connection service. (English: Critical machine type communication).
  • eMBB refers to the further improvement of user experience and other performance based on the existing mobile broadband service scenario.
  • mMTC is mainly for the application scenario of the Internet of Things, suitable for large-scale, low-power, low-cost, deep coverage.
  • Internet of Things terminals provide network access services, while URLLC is targeted at services that require data transmission reliability and time-delay, such as car networking and industrial control.
  • the three scenarios include diversified and differentiated services. Not all future use cases have strong requirements for rate and coverage. Therefore, 3GPP allows operators to build network slices through independent network function sets and parameter configurations. Serving multiple and virtual carrier requirements, 3GPP requires dynamic generation of network slices based on different market scenarios.
  • the types of network slices include the following three categories: fully independent slices, RAN shared slices, and CP shared slices.
  • FIG. 2A For a completely independent slice architecture diagram. Fully independent slices are end-to-end isolated slices, from access to cp, up are user-specific. This sliced data is completely isolated and more independent and secure. However, independent slicing also causes waste of resources, and network resources cannot be fully utilized. This situation is more suitable for a network customized for a certain type of terminal.
  • Figure 2B for a network architecture diagram of RAN shared slices. The RAN shared slices are usually not different on the RAN side, and the shared RAN improves the utilization of the RAN. There are differences in the CP in the network, such as eMBB, Internet of Things (English: Internet Of Things, referred to as: Iot) and other different networks. Referring to FIG.
  • eMBB Internet of Things (English: Internet Of Things, referred to as: Iot) and other different networks.
  • 2C a network architecture diagram of a shared slice for the CP.
  • CP shared slicing the main difference in the network is UP. Different UPs can provide us with different types of networks such as high latency and low bandwidth. Among them, the CP can be shared or partially shared.
  • the network side includes an independent logical network element SSF, which is responsible for network slice selection access of the terminal device.
  • SSF requests the HSS for the subscription information of the terminal device, and selects the network slice for the terminal device according to the subscription information of the terminal device and the service type currently requested by the terminal device.
  • the core network can be divided into multiple network slices, each network slice containing a set of network functions for specific functions.
  • the RAN node (Node) is connected to each network slice through the SSF.
  • the SSF selects the appropriate network slice to access the data network (English: data network), forming an end-to-end network slicing architecture in the 5G.
  • the SSF needs to perform network connection with multiple radio access network nodes, thereby increasing the signaling transmission burden on the network side.
  • the embodiment of the present application provides a method and a device for selecting a network slice, which are used to solve the problem of a large signaling transmission burden on the network side existing in the prior art.
  • the method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.
  • the embodiments of the present application can be applied to a mobile communication system such as a 5G communication system or a long term evolution (LTE) system.
  • a mobile communication system such as a 5G communication system or a long term evolution (LTE) system.
  • LTE long term evolution
  • FIG. 4A and FIG. 4B are diagrams showing a network architecture provided by an embodiment of the present application.
  • the network side includes an independent logical network element SSF, and also includes a core network device as a unified interface device that interfaces with the RAN side and interfaces with the SSF.
  • the core network device can be connected to a network slice for processing a service required by the terminal device.
  • the network slice shown in FIG. 4A is used to provide processing functions for different service requirements of the terminal device, and can be customized by a third party to meet personalized requirements of different applications, such as MBB, IOT, and the like.
  • the embodiment of the present application can be applied to a scenario in which a CP shares a slice or an application scenario in which a RAN shares a slice.
  • the network slice described in FIG. 4A is composed of a control plane and a user plane.
  • the control plane may be divided into network slices on multiple control planes according to the user's service processing requirements.
  • the network slice on the control plane is used to provide different processing functions for different service processing requirements of the terminal device.
  • a network slice on the divided control plane may be in one-to-one correspondence with the network slice on the user plane.
  • one network slice on the surface may be controlled to correspond to multiple network slices of multiple user planes. No specific limitation.
  • the core network device may be an independent network element in the core network, and may be implemented by a control plane network element on the control plane of the current 5G communication system or a mobile communication system such as LTE, for example, by mobility.
  • the management entity (English: Mobility Management Entity, MME for short), or the service gateway (English: Serving GateWay, S-GW), or the packet data network gateway (English: Packet Data Network GateWay, P-GW for short) is implemented. It can also be implemented by the S-GW control plane or the P-GW control plane.
  • the function of the core network device may also be formed by a control plane network element formed by any network element fusion between the MME, the S-GW, and the P-GW, or the S-GW control plane and the P-GW control plane are merged to form a control plane network element.
  • a new network element added to the core network of the mobile communication system can also implement the functions of the core network device.
  • the signaling transmission between the core network device and the RAN side follows the signaling protocol S1-AP of the application layer.
  • the terminal device may be a wireless terminal, for example, a mobile phone, a computer, a tablet computer, a personal digital assistant (PDA), and a mobile Internet device (English: mobile Internet device) , abbreviation: MID), wearable device, Internet Protocol (English: Internet Protocol, abbreviation: IP) telephone, network printer and e-book reader (English: e-book reader).
  • a wireless terminal for example, a mobile phone, a computer, a tablet computer, a personal digital assistant (PDA), and a mobile Internet device (English: mobile Internet device) , abbreviation: MID), wearable device, Internet Protocol (English: Internet Protocol, abbreviation: IP) telephone, network printer and e-book reader (English: e-book reader).
  • FIG. 5 a schematic flowchart of a method for selecting a network slice according to an embodiment of the present application is provided.
  • the method includes:
  • the core network device receives a first request message sent by the terminal device, where the first request message is used to request to allocate, to the terminal device, a network slice that provides a service service.
  • the first request message may be an initial attach request or may be a service request message or the like.
  • the core network device sends a query message to the SSF, where the query message carries the user information of the terminal device, and is used to query a network slice that can provide a service service for the terminal device.
  • the SSF After receiving the query message sent by the core network device, the SSF determines the slice information of the network slice corresponding to the user information of the terminal device according to the mapping relationship, and sends the slice information to the core network device.
  • the mapping relationship is used to describe a correspondence between user information of different terminal devices and slice information of different network slices.
  • the core network device after receiving, by the SSF, slice information of a network slice that is determined by the user information and capable of providing a service service required by the terminal device, forwarding the first request message to the slice The network slice corresponding to the information, so that the network slice corresponding to the slice information provides a service service for the terminal device.
  • the SSF may acquire a mapping relationship between the slice information of the network slice and the user information of the terminal device.
  • the obtaining the mapping relationship includes:
  • the mapping relationship may be sent by the network platform to the SSF; or
  • mapping relationship is pre-configured on the SSF.
  • mapping relationship is obtained by the SSF from the HSS.
  • the mapping relationship is obtained by the SSF from a third-party application server.
  • the user information of the terminal device includes at least one of the following information:
  • An international mobile subscriber identity IMSI of the terminal device An international mobile subscriber identity IMSI of the terminal device
  • the service type of the terminal device is the service type of the terminal device
  • the international mobile device identity code IMEI of the terminal device is the international mobile device identity code IMEI of the terminal device.
  • One possible application scenario is that the terminal device is attached to the network for the first time.
  • FIG. 6 is a schematic flowchart of a method for selecting a network slice according to an embodiment of the present application.
  • the terminal device sends an attach request message (initial attach request).
  • the initial attach request carries user information such as an IMSI and a service type of the terminal device.
  • the core network device After receiving the initial attach request sent by the terminal device, the core network device sends a query message to the SSF.
  • the query message can query the Query Slice request.
  • the query message may include user information such as an IMSI of the terminal device and a service type.
  • the user information may be an IMSI, or a service type, or an IMSI and a service type, and may also be an IMEI.
  • the SSF selects a network slice for the terminal device according to the user information, and sends the slice information of the selected network slice to the core network device.
  • the slice information of the network slice may be carried in the query response and sent to the core network device, as shown in FIG. 6.
  • the query response message can specifically be a Query Slice response.
  • the core network device After receiving the Query Slice response, the core network device sends an initial attach request of the terminal device to a network slice corresponding to the slice information.
  • the slice information of the network slice may include at least one of the following information:
  • the identification information of the network slice the type of the network slice, and the address information of the network slice.
  • the network slice corresponding to the slice information completes an attach procedure of the terminal device.
  • the network slice corresponding to the slice information sends the identifier information of the network slice to a core network device.
  • the core network device After receiving the identifier information of the network slice, the core network device sends the identifier information of the network slice to the terminal device. Therefore, when the terminal device requests the same service again, the identifier information of the network slice can be carried in the request message and sent to the core network device, and the core network device no longer needs to query the SSF, thereby reducing signaling transmission.
  • Another possible application scenario is that the terminal device requests the service again.
  • FIG. 7 is a schematic flowchart diagram of a method for selecting a network slice according to an embodiment of the present application.
  • the terminal device sends a service request message, where the service request message carries user information such as an IMSI and a service type of the terminal device, and further includes identifier information of the requested network slice.
  • the core network device After receiving the service request message sent by the terminal device, the core network device sends the service request message of the terminal device to the network slice corresponding to the identifier information.
  • the network slice corresponding to the identifier information completes an attach procedure of the terminal device.
  • FIG. 8 it is a network architecture diagram provided by an embodiment of the present application, which is applied to a scenario in which a CP shares a slice.
  • the network architecture includes three intelligent terminal devices, namely, a smart door lock, a mobile terminal 1 and a mobile terminal 2; the three access network nodes are AN1, AN2, and AN3, respectively.
  • the three access network nodes are respectively connected to the core network devices; the core network devices are respectively connected to three different network slices.
  • the three different network slices are the network slice A and the network slice B and the network slice C respectively.
  • the network slice A is used to provide service processing for the service demand of the home appliance, and the network slice B is used to provide service processing for the MBB service, and the network slice C is used.
  • the core network device is connected to the SSF.
  • the embodiment of the present application is described by taking the user information of the smart door lock as the IMEI as an example.
  • the core network device After receiving the request message sent by the smart door lock, the core network device does not have the slice information that the smart door lock has attached, and the core network device sends an inquiry message to the SSF, and the IMEI carrying the smart door lock is in the query message, so that the SSF is receiving.
  • the SSF matches the network slice A according to the IMEI, and sends a query response to the core network device, where the response message carries the slice information of the network slice A.
  • the core network device After receiving the query response from the SSF, the core network device sends a request message for the smart door lock to the network slice A.
  • the network slice A sends its own slice ID to the smart door lock, and the core network device and AN1 forward the slice ID of the network slice A to the smart door lock.
  • the request message may carry the slice ID to the core network device, so that the core network device directly selects the network slice A for the smart door lock.
  • the SSF can select different network slices for the smart terminal according to the service type carried in the smart terminal request.
  • the specific process refer to the smart door lock process, and details are not described herein.
  • the core network device for slice selection needs to be added between the CP and the SSF, and the connection between multiple ANs and the SSF is no longer required.
  • the SSF does not need to be connected to multiple network slices, and only needs to be connected to the above-mentioned core network device, thereby reducing signaling transmission and reducing resource occupation on the SSF.
  • the embodiment of the present application provides a network slice selection device, where the selection device is applied to the core network device.
  • the device includes:
  • the receiving unit 901 is configured to receive a first request message sent by the terminal device, where the first request message is used to request to allocate, to the terminal device, a network slice that provides a service service;
  • the sending unit 902 is configured to send a query message to the slice selection function entity SSF, where the query message carries the user information of the terminal device, and is used to query a network slice that can provide a service service for the terminal device;
  • the receiving unit 901 is further configured to receive, according to the user information, the slice information of the network slice that is determined by the SSF and that can provide the service service required by the terminal device;
  • the sending unit 902 is further configured to: after the receiving unit 901 receives the slice information, forward the first request message to a network slice corresponding to the slice information, so that the network corresponding to the slice information is used.
  • the slice provides a service service for the terminal device.
  • the user information of the terminal device includes at least one of the following information:
  • An international mobile subscriber identity IMSI of the terminal device An international mobile subscriber identity IMSI of the terminal device
  • the service type of the terminal device is the service type of the terminal device
  • the international mobile device identity code IMEI of the terminal device is the international mobile device identity code IMEI of the terminal device.
  • the receiving unit 901 is further configured to: after the sending unit 902 forwards the first request message to a network slice corresponding to the slice information, receive the network slice sending station. Describe the identification information of the network slice;
  • the sending unit 902 is further configured to send the identifier information of the network slice to the terminal device.
  • the receiving unit 901 is further configured to: after the sending unit 902 sends the identifier information of the network slice to the terminal device, receive the second request message sent by the terminal device.
  • the second request message carries the identifier information of the network slice.
  • the sending unit 902 is further configured to forward the second request message that is received by the receiving unit 901 to a network slice corresponding to the identifier information of the network slice, so that the network slice corresponding to the identifier information is
  • the terminal device provides a service service.
  • the slice information includes at least one of the following information:
  • the identification information of the network slice the type of the network slice, and the address information of the network slice.
  • each functional unit in each embodiment of the present application may be integrated into one processing. In the device, it may be physically present alone, or two or more units may be integrated in one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the selection means for the network slice applied to the core network device may include a communication interface 1010, a processor 1020, and a memory 1030.
  • the hardware of the entity corresponding to the unit shown in FIG. 9 above may be the processor 1020.
  • the processor 1020 transmits and receives data through the communication interface 1010 and is used to implement the method performed by the core network device described in FIGS. 5-7.
  • each step of the processing flow may be completed by an integrated logic circuit of hardware in the processor 1020 or an instruction in the form of software.
  • the processor 1020 can be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, and a discrete hardware component, which can be implemented or executed in the embodiment of the present application.
  • a general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software units in the processor.
  • Program code for processor 1020 to implement the above methods may be stored in memory 1030.
  • the memory 1030 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid state drive (SSD), or a volatile memory (English: volatile) Memory), such as random access memory (English: random-access memory, abbreviation: RAM).
  • Memory 1030 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • the specific connection medium between the communication interface 1010, the processor 1020, and the memory 1030 is not limited in the embodiment of the present application.
  • the memory 1030, the processor 1020, and the communication interface 1010 are connected by a bus 1040 in FIG. 10.
  • the bus is indicated by a thick line in FIG. 10, and the connection manner between other components is only schematically illustrated. , not limited to.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 10, but it does not mean that there is only one bus or one type of bus.
  • the embodiment of the present application further provides a device for selecting a network slice, and the selection device is applied to an SSF.
  • the device includes:
  • the receiving unit 1101 is configured to receive a query message sent by the core network device, where the query message carries user information of the terminal device, and is used to query a network slice that provides a service service for the terminal device;
  • the processing unit 1102 is configured to determine, according to the mapping relationship, slice information of a network slice corresponding to the user information of the terminal device, where the mapping relationship is used to describe a correspondence between user information of different terminal devices and slice information of different network slices. relationship;
  • the sending unit 1103 is configured to send the slice information determined by the processing unit 1102 to the core network device.
  • the user information of the terminal device includes at least one of the following information:
  • An international mobile subscriber identity IMSI of the terminal device An international mobile subscriber identity IMSI of the terminal device
  • the service type of the terminal device is the service type of the terminal device
  • the international mobile device identity code IMEI of the terminal device is the international mobile device identity code IMEI of the terminal device.
  • each functional unit in each embodiment of the present application may be integrated into one processing. In the device, it may be physically present alone, or two or more units may be integrated in one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the selection means for the network slice applied to the SSF may include a communication interface 1210, a processor 1220, and a memory 1230.
  • the hardware of the entity corresponding to the unit shown in FIG. 11 above may be the processor 1220.
  • the processor 1220 transceives data via the communication interface 1210 and is used to implement the methods performed by the SSFs described in Figures 5-7.
  • each step of the processing flow may be completed by an integrated logic circuit of hardware in the processor 1220 or an instruction in the form of software.
  • the processor 1220 can be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or a transistor logic device, and a discrete hardware component, which can be implemented or executed in the embodiment of the present application.
  • a general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software units in the processor.
  • Program code for processor 1220 to implement the above methods may be stored in memory 1230.
  • the memory 1230 may be a non-volatile memory such as an HDD or SSD or the like, and may also be a volatile memory such as a RAM.
  • Memory 1230 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.
  • connection medium between the communication interface 1210, the processor 1220, and the memory 1230 is not limited in the embodiment of the present application.
  • the memory 1230, the processor 1220, and the communication interface 1210 are connected by a bus 1240 in FIG. 12, and the bus is indicated by a thick line in FIG. 12, and the connection manner between other components is only schematically illustrated. , not limited to.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请公开了一种网络切片的选择方法及装置，用以解决现有技术中存在的网络侧传输负担大的问题。所述方法包括：核心网设备接收到由终端设备发送的第一请求消息，所述第一请求消息用于请求为所述终端设备分配提供业务服务的网络切片；所述核心网设备向切片选择功能实体SSF发送查询消息，所述查询消息携带所述终端设备的用户信息，且用于查询能够为所述终端设备提供业务服务的网络切片；所述核心网设备接收所述SSF发送的基于所述用户信息确定的能够提供所述终端设备所需业务服务的网络切片的切片信息后，将所述第一请求消息转发给所述切片信息对应的网络切片，以使得所述切片信息对应的网络切片为所述终端设备提供业务服务。

Description

一种网络切片的选择方法及装置
本申请要求于2017年2月27日提交中国专利局、申请号为201710108379.1、发明名称为“一种网络切片的选择方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种网络切片的选择方法及装置。
背景技术
随着网络通信连接能力的不断增强，几乎每个产业都在进行数字化转型，来提升工作和生产效率。例如基于全息技术的虚拟会议、虚拟课堂；远程实时控制危险环境下的大型机械，远程手术；高速移动交通工具环境下的移动宽带；无处不在的物联网，无处不在的移动视频；实时工业控制等等。数字化转型对连接能力的需求不断增强和多样化，不同用例对网络在速度、性能、安全、可靠性、时延等方面的需求相差甚远，因此，传统的单一网络也逐渐无法满足所有连接能力通讯服务的需求。采用传统的专网方式，面临高成本、上市时间(英文：Time to Market，简称：TTM)长的问题。第五代移动通信技术(5G)系统提出网络切片概念，一个网络切片满足某一类或一个用例的连接通信服务需求，整个5G系统由满足不同连接能力的大量网络切片组成。
为了满足各行各业不同的场景需求，运营商需要提供不同功能和QoS的连接通信服务。为了降低技术实现的复杂度，缩短业务上市时间，增强创新能力，采用虚拟化技术对整个网络资源进行切片，从而将不同连接能力的通信服务部署在不同的网络切片上，使具体不同连接能力的通信服务之间在技术上实现解耦。
针对5G网络切片架构，用户设备(英文：User Equipment，简称：UE)接入网络时，面临着网络切片选择。目前在进行网络切片选择时，一般在网络侧增加独立的逻辑网元切片选择功能实体(英文：Slice Selection Function，简称：SSF)，其负责为UE选择UE可接入的网络切片。无线接入网节点(RAN Node)基于UE的请求，向SSF请求为UE分配网络切片，从而SSF在接收到UE的请求后，为UE选择网络切片。从上述可以看出，SSF需要与多个无线接入网节点进行网络连接，从而增加了网络侧的信令传输负担。
发明内容
本申请提供一种网络切片的选择方法及装置，用以解决现有技术中存在的网络侧传输负担大的问题。
第一方面，本申请实施例提供了一种网络切片的选择方法，包括：
核心网设备接收到由终端设备发送的第一请求消息，所述第一请求消息用于请求为所述终端设备分配提供业务服务的网络切片；所述核心网设备向切片选择功能实体SSF发送查询消息，所述查询消息携带所述终端设备的用户信息，且用于查询能够为所述终端设备提供业 务服务的网络切片；所述核心网设备接收所述SSF发送的基于所述用户信息确定的能够提供所述终端设备所需业务服务的网络切片的切片信息后，将所述第一请求消息转发给所述切片信息对应的网络切片，从而所述切片信息对应的网络切片为所述终端设备提供业务服务。通过上述方式可以看出，SSF不再需要与多个接入网设备进行对接，从而减少了SSF与接入网设备之间的信令传输，节省了传输资源的占用。
在一种可能的设计中，所述终端设备的用户信息包括如下信息中的至少一种：
所述终端设备的国际移动用户识别码IMSI；
所述终端设备的服务类型；
所述终端设备的国际移动设备身份码IMEI。
通过上述设计，在查询消息中携带上述用户信息，从而使得SSF基于这些用户信息来为用户选择网络切片。
在一种可能的设计中，所述方法还包括：
所述核心网设备将所述第一请求消息转发给所述切片信息对应的网络切片后，接收所述网络切片发送的所述网络切片的标识信息；
所述核心网设备将所述网络切片的标识信息发送给所述终端设备。
通过上述设计，由网络切片将自身的标识信息发给核心网设备，并由核心网设备转发到终端设备，从而终端设备知道自身适合的网络切片，从而在下次附着或业务请求时，直接请求接入该网络切片，减少了所述核心网设备与SSF之间的信令传输，节省了传输资源。
在一种可能的设计中，所述核心网设备将所述网络切片的标识信息发送给所述终端设备后，所述方法还包括：
所述核心网设备接收所述终端设备发送的第二请求消息，所述第二请求消息携带所述网络切片的标识信息；
所述核心网设备将所述第二请求消息转发给所述网络切片的标识信息对应的网络切片，以使得所述标识信息对应的网络切片为所述终端设备提供业务服务。
通过上述设计，终端设备接收到核心网设备发送的网络切片的标识信息，则终端设备知道了自身适合的网络切片，从而在下次附着或业务请求时，直接请求接入该网络切片，减少了所述核心网设备与SSF之间的信令传输，节省了传输资源。
在一种可能的设计中，所述切片信息包括如下信息中的至少一种：
网络切片的标识信息，网络切片的类型，网络切片的地址信息。
在一种可能的设计中，所述方法还可以包括：
所述核心网设备将所述第一请求消息转发给所述切片信息对应的网络切片后，接收所述网络切片发送的所述网络切片的标识信息；
所述核心网设备保存所述终端设备与所述网络切片的标识信息之间的对应关系。
通过上述设计，核心网设备接收所述网络切片发送的所述网络切片的标识信息，即可以确定匹配终端设备的网络切片，从而可以保存所述终端设备与所述网络切片的标识信息之间的对应关系，后续再接收到该终端设备的请求时，可以基于对应关系为终端设备选择网络切片，从而减少了核心网设备与SSF之间的信令传输，减少的传输资源的占用。
在一种可能的设计中，所述方法还可以包括：
所述核心网设备接收所述终端设备发送的第三请求消息，所述第三请求消息用于请求为 所述终端设备分配提供业务服务的网络切片；
所述核心网设备基于所述对应关系确定所述终端设备所需业务对应的网络切片，并将所述第三请求消息转发给确定的所述网络切片，以使得所述终端设备附着到所述确定的网络切片。
通过上述设计，核心网设备在接收到终端设备发送的请求消息后，确定对应关系中保存有该终端设备对应的网络切片的切片标识后，不再需要向SSF查询该满足该终端设备的网络切片，从而减少了核心网设备与SSF之间的信令传输，减少的传输资源的占用。
第二方面，本申请实施例提供了一种网络切片的选择方法，包括：
切片选择功能实体SSF接收到核心网设备发送的查询消息，所述查询消息携带终端设备的用户信息，且用于查询为所述终端设备提供业务服务的网络切片；
所述SSF根据映射关系确定所述终端设备的用户信息对应的网络切片的切片信息，并将所述切片信息发送给所述核心网设备，所述映射关系用于描述不同终端设备的用户信息与不同的网络切片的切片信息之间的对应关系。
通过上述设计可以看出，SSF仅需与核心网设备进行对接即可，不再需要与多个接入网设备进行对接，从而减少了SSF与接入网设备之间的信令传输，节省了传输资源的占用。
在一种可能的设计中，所述终端设备的用户信息包括如下信息中的至少一种：
所述终端设备的国际移动用户识别码IMSI；
所述终端设备的服务类型；
所述终端设备的国际移动设备身份码IMEI。
基于与方法实施例同样的发明构思，第三方面，本申请实施例提供了一种网络切片的选择装置，包括：
接收单元，用于接收到由终端设备发送的第一请求消息，所述第一请求消息用于请求为所述终端设备分配提供业务服务的网络切片；
发送单元，用于向切片选择功能实体SSF发送查询消息，所述查询消息携带所述终端设备的用户信息，且用于查询能够为所述终端设备提供业务服务的网络切片；
所述接收单元，还用于接收所述SSF发送的基于所述用户信息确定的能够提供所述终端设备所需业务服务的网络切片的切片信息；
所述发送单元，还用于在所述接收单元接收到所述切片信息后，将所述第一请求消息转发给所述切片信息对应的网络切片，以使得所述切片信息对应的网络切片为所述终端设备提供业务服务。
在一种可能的设计中，所述终端设备的用户信息包括如下信息中的至少一种：
所述终端设备的国际移动用户识别码IMSI；
所述终端设备的服务类型；
所述终端设备的国际移动设备身份码IMEI。
在一种可能的设计中，所述接收单元，还用于在所述发送单元将所述第一请求消息转发给所述切片信息对应的网络切片后，接收所述网络切片发送的所述网络切片的标识信息；
所述发送单元，还用于将所述网络切片的标识信息发送给所述终端设备。
在一种可能的设计中，所述接收单元，还用于在所述发送单元将所述网络切片的标识信息发送给所述终端设备后，接收所述终端设备发送的第二请求消息，所述第二请求消息携带 所述网络切片的标识信息；
所述发送单元，还用于将所述接收单元接收到的所述第二请求消息转发给所述网络切片的标识信息对应的网络切片，以使得所述标识信息对应的网络切片为所述终端设备提供业务服务。
在一种可能的设计中，所述切片信息包括如下信息中的至少一种：
网络切片的标识信息，网络切片的类型，网络切片的地址信息。
第四方面，本申请实施例还提供了一种网络切片的选择装置，包括：
接收单元，用于接收核心网设备发送的查询消息，所述查询消息携带终端设备的用户信息，且用于查询为所述终端设备提供业务服务的网络切片；
处理单元，用于根据映射关系确定所述终端设备的用户信息对应的网络切片的切片信息，所述映射关系用于描述不同终端设备的用户信息与不同的网络切片的切片信息之间的对应关系；
发送单元，用于所述处理单元确定的所述切片信息发送给所述核心网设备。
在一种可能的设计中，所述终端设备的用户信息包括如下信息中的至少一种：
所述终端设备的国际移动用户识别码IMSI；
所述终端设备的服务类型；
所述终端设备的国际移动设备身份码IMEI。
基于与方法实施例同样的发明构思，第五方面，本申请实施例还提供了一种应用于核心网设备的网络切片选择装置，该装置包括：
通信接口，处理器以及存储器。
存储器用于存储处理器所执行的程序代码。
所述处理器通过通信接口收发数据，具体用于执行存储器存储的程序代码，实现第一方面或第一方面的任一种设计所述的方法。
基于与方法实施例同样的发明构思，第六方面，本申请实施例还提供了一种应用于SSF的网络切片选择装置，该装置包括：
通信接口，处理器以及存储器。
存储器用于存储处理器所执行的程序代码。
所述处理器通过通信接口收发数据，具体用于执行存储器存储的程序代码，实现第二方面或第二方面的任一种设计所述的方法。
第七方面，本申请实施例中还提供一种计算机存储介质，该存储介质中存储软件程序，该软件程序在被一个或多个处理器读取并执行时可实现第一方面或上述第一方面的任意一种设计提供的方法，或者实现第二方面或者第二方面的任一种设计所提供的方法。
通过本申请提供的方案，通过核心网设备接收到由终端设备发送的第一请求消息后，向SSF发送查询消息，所述查询消息用于查询所述终端设备所需业务对应的网络切片；从而所述核心网设备接收所述SSF发送的所述终端设备所需业务对应的网络切片的切片信息后，将所述第一请求消息转发给所述切片信息对应的网络切片，以使得所述切片信息对应的网络切片为所述终端设备提供业务服务。从上述可以看出，SSF不再需要与每个接入网设备进行对接，也不需与多个网络切片进行对接，仅需要与上述核心网设备对接即可，从而减少了信令传输，减少了资源的占用。
附图说明
图1为本申请实施例提供的网络切片满足不同服务需求的网络架构示意图；
图2A为本申请实施例提供的完全独立切片示意图；
图2B为本申请实施例提供的RAN共享切片示意图；
图2C为本申请实施例提供的CP共享切片示意图；
图3为本申请实施例提供的SSF与RAN节点对接的网络架构示意图；
图4A为本申请实施例提供的应用于RAN共享切片场景下的网络架构示意图；
图4B为本申请实施例提供的应用于CP共享切片场景下的网络架构示意图；
图5为本申请实施例提供的一种网络切片的选择方法流程图；
图6为本申请实施例提供的在终端设备首次附着场景下的网络切片的选择方法流程示意图；
图7为本申请实施例提供的终端设备再次附着或者业务请求场景下的网络切片的选择方法流程示意图；
图8为本申请实施例提供的具体应用场景下的网络切片的选择方法流程示意图；
图9为本申请实施例提供的一种应用于核心网设备的网络切片的选择装置示意图；
图10为本申请实施例提供的另一种应用于核心网设备的网络切片的选择装置示意图；
图11为本申请实施例提供的一种应用于SSF的网络切片的选择装置示意图；
图12为本申请实施例提供的另一种应用于SSF的网络切片的选择装置示意图。
具体实施方式
网络切片，即“5G切片”，支持一个特定的连接类型的通信服务，并为这个服务提供控制面(英文：Control Plane，简称：CP)和用户面(英文：User Plane，简称：UP)特定的处理方法。为了达到这个目的，移动运营商在核心网(英文：core network，简称：CN)的控制平台上通过一系列网络功能的配置与编排实现成百上千的网络切片的配置与管理，以便支持特定的用例或商业模式。网络切片可以涉及端到端之间的网元的一系列配置与支持，包含用户设备(英文：user equipment，简称：UE)端、接入网(英文：radio access network，简称：RAN)等设备。网络切片可以用于支持特定应用和商业模式，仅仅提供必要的业务处理，并避免其它所有不必要的功能，简化复杂度，缩短业务上市时间；网络切片允许第三方对网络切片做一定程度的控制，提升灵活性，减少运营商的工作量；网络切片除了包括资源上网络切片，还提供基于切片资源的网络及网元的通用的管理方法，如部署、扩缩容、软件升级等。切片数量比较大时，将会增加运营商的维护成本。为了降低维护成本，可以提升网络部署、扩缩容、升级等生命周期管理过程的自动化程度；另外，网络切片与传统的移动虚拟网络运营(英文：mobile virtual network operator，简称：MVNO)共享同一张网络的方式不同，网络切片采用虚拟化技术，从资源上实现了不同切片之间的隔离，根据多样化需求虚拟出不同的多张网络。
网络切片将可以实现网络服务质量(英文：Quality of Service，简称：QoS)的隔离，灵活的网络管控与网络效率的提升，网络管理者将可以根据端到端的QoS需求进行分解，映 射到不同的子网络系统与转发设备，同时以低成本，高速率的方式为建立网络切片，并不影响现有的业务。网络切片可以提供部分灵活的可编程接口开放给第三方用户，从而使得第三方用户可以基于开放接口设计并开发信的网络业务并实现快速部署，为运营商带来可观的经济效益，同时提高了现有网络的使用效率。
目前，3GPP(英文：the third generation partnership project，简称：3GPP)对5G的典型场景归纳为以下三种：参见图1所示，增强的移动宽带业务(英文：enhanced mobile broadband，简称：eMBB)，海量机器类型连接业务(英文：massive machine type communication，简称：mMTC)以及超可靠低时延业务(英文：ultra-reliable and low latency communications，简称：URLLC)，URLLC也可以称为特定机器类型连接业务(英文：Critical machine type communication)。其中，eMBB是指在现有移动宽带业务场景的基础上，对于用户体验等性能的进一步提升，mMTC则主要针对物联网的应用场景，适用于大规模，低功耗，低成本，深度覆盖的物联网终端提供网络接入服务，而URLLC则面向对数据传输可靠性以及时延要求苛刻的业务，如车联网，工业控制等场景。三大场景中包含了多样化，差异性的服务，并非所有未来的用例都对速率，覆盖有较强的需求，因此，3GPP允许运营商通过独立网络功能集合与参数配置构建网络切片，用来服务多个以及虚拟运营商的需求，同时，3GPP要求可以根据不同的市场场景动态生成网络切片。
目前，网络切片的类型包括以下三大类：完全独立切片、RAN共享切片、CP共享切片。
参见图2A所示为完全独立切片的架构图，完全独立切片是端到端隔离的切片，从接入到cp、up都是用户特有的。这种切片数据完全隔离，更加独立安全。但是独立的切片也会带来资源的浪费，网络资源无法得到充分的利用，这种情况比较适合为某类终端定制的网络。参见图2B所示为RAN共享切片的网络架构图。RAN共享切片在RAN侧通常是没有差异的，共享的RAN提高了RAN的利用率。而网络中CP存在着差异，比如在eMBB、物联网(英文：Internet Of Things，简称：Iot)等不同的网络。参见图2C所示，为CP共享切片的网络架构图。CP共享切片中，网络主要的差异在于UP，不同的UP可以给我们提供高延时、低带宽等等不同类型的网络。其中，CP可以全部共享或者部分共享。
如图3所示，为目前一种可能的5G网络架构示意图。图3中，网络侧包括独立的逻辑网元SSF，负责终端设备的网络切片选择接入。SSF在接收到终端设备的请求后，向HSS请求终端设备的签约信息，并根据终端设备的签约信息和终端设备当前请求的服务类型为终端设备选择网络切片。图3中，核心网中可以划分为多个网络切片，每个网络切片包含一组特定功能的网络功能。RAN节点(Node)通过SSF与各个网络切片(Network Slice)连通。终端设备接入RAN节点后，通过SSF选择到合适的网络切片，从而接入数据网络(英文：data network)，形成了5G中端到端的网络切片架构。从上述可以看出，SSF需要与多个无线接入网节点进行网络连接，从而增加了网络侧的信令传输负担。
基于此，本申请实施例提供一种网络切片的选择方法及装置，用以解决现有技术中存在的网络侧的信令传输负担较大的问题。其中，方法和装置是基于同一发明构思的，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
本申请实施例可以应用于5G通信系统或者长期演进(英文：long term evolution，简称：LTE)系统等移动通信系统。
参见图4A和图4B所示，为本申请实施例提供的一种网络架构图。网络侧包括独立的逻 辑网元SSF，还包括一个核心网设备，作为与RAN侧对接的统一接口设备，并且与SSF进行对接。另外所述核心网设备可以与用于处理终端设备所需业务的网络切片进行对接。图4A中所示的网络切片，用于针对终端设备不同的业务需求提供处理功能，可以由第三方定制，满足不同应用的个性化需求，如MBB、IOT等。
本申请实施例可以应用于CP共享切片的场景中或者应用于RAN共享切片的应用场景。
针对RAN共享切片的应用场景，参见图4A所示的网络架构图，图4A中所述的网络切片，由控制面和用户面共同组成。
针对CP共享切片的应用场景，参见图4B所示的网络架构图，图4B中，针对共享控制面架构，可以将控制面根据用户的业务处理需求划分为多个控制面上的网络切片，不同的控制面上的网络切片用于针对终端设备不同的业务处理需求提供不同的处理功能。经过划分后的控制面上的一个网络切片可以与用户面上的网络切片一一对应，当然还可以控制面上的一个网络切片对应多个用户面的多个网络切片，本申请实施例在此不作具体限定。
本申请实施例中，所述核心网设备可以核心网中一个独立的网元，具体可以目前5G通信系统或者LTE等移动通信系统中控制面上的一个控制面网元来实现，比如由移动性管理实体(英文：Mobility Management Entity，简称：MME)、或者服务网关(英文：Serving GateWay，S-GW)，或分组数据网网关(英文：Packet Data Network GateWay，简称：P-GW)来实现，也可以由S-GW控制面或P-GW控制面来实现。所述核心网设备的功能还可以由MME、S-GW和P-GW中任意网元融合形成的控制面网元，或S-GW控制面和P-GW控制面融合形成控制面网元来实现。当然，还可以在移动通信系统的核心网中新增加的一个网元，来实现上述核心网设备的功能。另外，核心网设备与RAN侧之间的信令传输遵循应用层的信令协议S1-AP。
本申请实施例中，终端设备可以是可以为无线终端，例如可以为移动电话、计算机、平板电脑、个人数码助理(英文：personal digital assistant，缩写：PDA)、移动互联网设备(英文：mobile Internet device，缩写：MID)、可穿戴设备、互联网协议(英文：Internet Protocol，缩写：IP)电话、网络打印机和电子书阅读器(英文：e-book reader)等。
基于上述描述，如图5所示，为本申请实施例提供的一种网络切片的选择方法流程示意图。
参见图5，该方法包括：
S501，核心网设备接收到由终端设备发送的第一请求消息，所述第一请求消息用于请求为所述终端设备分配提供业务服务的网络切片。
其中，第一请求消息可以是附着请求消息(initial attach request)或者可以是业务请求消息等。
S502，所述核心网设备向SSF发送查询消息，所述查询消息携带所述终端设备的用户信息，且用于查询能够为所述终端设备提供业务服务的网络切片。
S503，SSF接收到所述核心网设备发送的查询消息后，根据映射关系确定所述终端设备的用户信息对应的网络切片的切片信息，并将所述切片信息发送给所述核心网设备。
其中，所述映射关系用于描述不同终端设备的用户信息与不同的网络切片的切片信息之间的对应关系。
S504，所述核心网设备接收所述SSF发送的基于所述用户信息确定的能够提供所述终端设备所需业务服务的网络切片的切片信息后，将所述第一请求消息转发给所述切片信息对应 的网络切片，以使得所述切片信息对应的网络切片为所述终端设备提供业务服务。
需要说明的是，在网络建立时，所述SSF可以获取网络切片的切片信息与终端设备的用户信息之间的映射关系。
具体的，所述映射关系的获取方式包括：
所述映射关系可以由网络平台发送给所述SSF的；或者，
所述映射关系是预先配置在所述所述SSF上；或者，
所述映射关系是所述SSF从HSS中获取到的；或者，
所述映射关系是所述SSF从第三方应用服务器中获取到的。
本申请实施例中，所述终端设备的用户信息包括如下信息中的至少一种：
所述终端设备的国际移动用户识别码IMSI；
所述终端设备的服务类型；
所述终端设备的国际移动设备身份码IMEI。
下面通过具体的实施例描述前面的过程。
一种可能的应用场景为，终端设备首次附着到网络。
如图6所示，为本申请实施例提供的一种网络切片的选择方法流程示意图。
S601，终端设备发送附着请求消息(initial attach request)。其中，所述initial attach request携带终端设备的IMSI、服务类型等用户信息。
S602，核心网设备接收到终端设备发送的initial attach request后，向SSF发送查询消息。
其中，查询消息可以查询切片请求(Query Slice request)。该查询消息中可以包括终端设备的IMSI、服务类型等用户信息。
具体的，用户信息可以是IMSI、或者是服务类型、或者是IMSI和服务类型、还可以是IMEI等。
S603，SSF根据用户信息为所述终端设备选择网络切片，并且选择的网络切片的切片信息发送给所述核心网设备。
其中，网络切片的切片信息可以携带在查询响应中发送给所述核心网设备，参见图6所示。
查询响应消息具体可以Query Slice response。
S604，所述核心网设备在接收到所述Query Slice response后，将所述终端设备的initial attach request发送给所述切片信息对应的网络切片。
其中，网络切片的切片信息中可以包括如下信息中的至少一种：
网络切片的标识信息，网络切片的类型，网络切片的地址信息。
S605，所述切片信息对应的网络切片完成终端设备的附着流程。
S606，所述切片信息对应的网络切片将所述网络切片的标识信息发送给核心网设备。
S607，所述核心网设备在接收到所述网络切片的标识信息后，将所述网络切片的标识信息发送给所述终端设备。从而在终端设备再次请求同样的业务时，可以将网络切片的标识信息携带在请求消息中发送给核心网设备，核心网设备不再需要向SSF查询，进而减少了信令传输。
另一种可能的应用场景为，终端设备再次请求业务。
如图7所示，为本申请实施例提供的一种网络切片的选择方法流程示意图。
S701，终端设备发送业务请求消息；其中，所述业务请求消息携带终端设备的IMSI、服务类型等用户信息，还包括所请求的网络切片的标识信息。
S702，核心网设备接收到终端设备发送的业务请求消息后，将所述终端设备的业务请求消息发送给所述标识信息对应的网络切片。
S703，所述标识信息对应的网络切片完成终端设备的附着流程。
下面结合具体应用场景对本申请实施例提供的技术方案进行具体描述。
参见图8所示，为本申请实施例提供的网络架构图，其针对CP共享切片的应用场景。网络架构中包括3个智能终端设备、分别为智能门锁、移动终端1以及移动终端2；3个接入网节点分别为AN1、AN2以及AN3。三个接入网节点分别与核心网设备对接；核心网设备分别与3个不同的网络切片对接。3个不同的网络切片分别为网络切片A和网络切片B以及网络切片C，网络切片A用于针对家电的业务需求提供业务处理，网络切片B用于针对MBB业务提供业务处理，网络切片C用于针对低时延的业务提供业务处理。另外，核心网设备与SSF实现对接。本申请实施例在此以智能门锁的用户信息为IMEI为例进行说明。
核心网设备收到智能门锁发送的请求消息后，请求消息中没有智能门锁曾附着的slice信息，核心网设备向SSF发送查询消息，查询消息中携带智能门锁的IMEI，从而SSF在接收到智能门锁的IMEI后，SSF根据IMEI匹配到网络切片A，并向核心网设备发送查询响应，响应消息中携带网络切片A的切片信息。核心网设备收到SSF的查询响应后，将智能门锁的请求消息发给网络切片A。网络切片A将自身的切片ID发送给智能门锁，具体由核心网设备以及AN1将网络切片A的切片ID转发给智能门锁。在下次智能门锁进行业务请求时，可以在请求消息中携带切片ID给核心网设备，从而核心网设备直接为智能门锁选择网络切片A。
而对于智能终端，比如手机，智能终端的用户使用不同的应用，发起请求时会有不同的服务类型(service type)。从而SSF可根据智能终端请求中携带的service type不同，为智能终端选择不同的网络切片上，具体流程可以参见智能门锁流程，在此不再赘述。
本申请实施例中，仅需要在CP与SSF之间增加用于切片选择的核心网设备，不再需要多个AN与SSF之间对接。SSF也不需与多个网络切片进行对接，仅需要与上述核心网设备对接即可，从而减少了信令传输，减少了SSF上资源的占用。
基于与方法实施例同样的发明构思，本申请实施例提供了一种网络切片的选择装置，所述选择装置应用于上述核心网设备，参见图9所示，所述装置包括：
接收单元901，用于接收到由终端设备发送的第一请求消息，所述第一请求消息用于请求为所述终端设备分配提供业务服务的网络切片；
发送单元902，用于向切片选择功能实体SSF发送查询消息，所述查询消息携带所述终端设备的用户信息，且用于查询能够为所述终端设备提供业务服务的网络切片；
所述接收单元901，还用于接收所述SSF发送的基于所述用户信息确定的能够提供所述终端设备所需业务服务的网络切片的切片信息；
所述发送单元902，还用于在所述接收单元901接收到所述切片信息后，将所述第一请求消息转发给所述切片信息对应的网络切片，以使得所述切片信息对应的网络切片为所述终端设备提供业务服务。
在一种可能的设计中，所述终端设备的用户信息包括如下信息中的至少一种：
所述终端设备的国际移动用户识别码IMSI；
所述终端设备的服务类型；
所述终端设备的国际移动设备身份码IMEI。
在一种可能的设计中，所述接收单元901，还用于在所述发送单元902将所述第一请求消息转发给所述切片信息对应的网络切片后，接收所述网络切片发送的所述网络切片的标识信息；
所述发送单元902，还用于将所述网络切片的标识信息发送给所述终端设备。
在一种可能的设计中，所述接收单元901，还用于在所述发送单元902将所述网络切片的标识信息发送给所述终端设备后，接收所述终端设备发送的第二请求消息，所述第二请求消息携带所述网络切片的标识信息；
所述发送单元902，还用于将所述接收单元901接收到的所述第二请求消息转发给所述网络切片的标识信息对应的网络切片，以使得所述标识信息对应的网络切片为所述终端设备提供业务服务。
在一种可能的设计中，所述切片信息包括如下信息中的至少一种：
网络切片的标识信息，网络切片的类型，网络切片的地址信息。
本申请实施例中对单元的划分是示意性的，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，另外，在本申请各个实施例中的各功能单元可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
如图10所示，应用于核心网设备的网络切片的选择装置可以包括通信接口1010、处理器1020以及存储器1030。上述图9所示的单元对应的实体的硬件可以为处理器1020。处理器1020通过通信接口1010收发数据，并用于实现图5-图7中所述的核心网设备所执行的方法。在实现过程中，处理流程的各步骤可以通过处理器1020中的硬件的集成逻辑电路或者软件形式的指令完成。处理器1020可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件单元组合执行完成。处理器1020用于实现上述方法所执行的程序代码可以存储在存储器1030中。存储器1030可以是非易失性存储器，比如硬盘(英文：hard disk drive，缩写：HDD)或固态硬盘(英文：solid-state drive，缩写：SSD)等，还可以是易失性存储器(英文：volatile memory)，例如随机存取存储器(英文：random-access memory，缩写：RAM)。存储器1030是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
本申请实施例中不限定上述通信接口1010、处理器1020以及存储器1030之间的具体连接介质。本申请实施例在图10中以存储器1030、处理器1020以及通信接口1010之间通过总线1040连接，总线在图10中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图10中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
本申请实施例还提供了一种网络切片的选择装置，所述选择装置应用于SSF，参见图11 所示，所述装置包括：
接收单元1101，用于接收核心网设备发送的查询消息，所述查询消息携带终端设备的用户信息，且用于查询为所述终端设备提供业务服务的网络切片；
处理单元1102，用于根据映射关系确定所述终端设备的用户信息对应的网络切片的切片信息，所述映射关系用于描述不同终端设备的用户信息与不同的网络切片的切片信息之间的对应关系；
发送单元1103，用于所述处理单元1102确定的所述切片信息发送给所述核心网设备。
在一种可能的设计中，所述终端设备的用户信息包括如下信息中的至少一种：
所述终端设备的国际移动用户识别码IMSI；
所述终端设备的服务类型；
所述终端设备的国际移动设备身份码IMEI。
本申请实施例中对单元的划分是示意性的，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，另外，在本申请各个实施例中的各功能单元可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
如图12所示，应用于SSF的网络切片的选择装置可以包括通信接口1210、处理器1220以及存储器1230。上述图11所示的单元对应的实体的硬件可以为处理器1220。处理器1220通过通信接口1210收发数据，并用于实现图5-图7中所述的SSF所执行的方法。在实现过程中，处理流程的各步骤可以通过处理器1220中的硬件的集成逻辑电路或者软件形式的指令完成。处理器1220可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件单元组合执行完成。处理器1220用于实现上述方法所执行的程序代码可以存储在存储器1230中。存储器1230可以是非易失性存储器，比如HDD或SSD等，还可以是易失性存储器，例如RAM。存储器1230是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。
本申请实施例中不限定上述通信接口1210、处理器1220以及存储器1230之间的具体连接介质。本申请实施例在图12中以存储器1230、处理器1220以及通信接口1210之间通过总线1240连接，总线在图12中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图12中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计 算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (14)

  1. 一种网络切片的选择方法，其特征在于，包括：
    核心网设备接收到由终端设备发送的第一请求消息，所述第一请求消息用于请求为所述终端设备分配提供业务服务的网络切片；
    所述核心网设备向切片选择功能实体SSF发送查询消息，所述查询消息携带所述终端设备的用户信息，且用于查询能够为所述终端设备提供业务服务的网络切片；
    所述核心网设备接收所述SSF发送的基于所述用户信息确定的能够提供所述终端设备所需业务服务的网络切片的切片信息后，将所述第一请求消息转发给所述切片信息对应的网络切片，以使得所述切片信息对应的网络切片为所述终端设备提供业务服务。
  2. 如权利要求1所述的方法，其特征在于，所述终端设备的用户信息包括如下信息中的至少一种：
    所述终端设备的国际移动用户识别码IMSI；
    所述终端设备的服务类型；
    所述终端设备的国际移动设备身份码IMEI。
  3. 如权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述核心网设备将所述第一请求消息转发给所述切片信息对应的网络切片后，接收所述网络切片发送的所述网络切片的标识信息；
    所述核心网设备将所述网络切片的标识信息发送给所述终端设备。
  4. 如权利要求3所述的方法，其特征在于，所述核心网设备将所述网络切片的标识信息发送给所述终端设备后，所述方法还包括：
    所述核心网设备接收所述终端设备发送的第二请求消息，所述第二请求消息携带所述网络切片的标识信息；
    所述核心网设备将所述第二请求消息转发给所述网络切片的标识信息对应的网络切片，以使得所述标识信息对应的网络切片为所述终端设备提供业务服务。
  5. 如权利要求1至4任一项所述的方法，其特征在于，所述切片信息包括如下信息中的至少一种：
    网络切片的标识信息，网络切片的类型，网络切片的地址信息。
  6. 一种网络切片的选择方法，其特征在于，包括：
    切片选择功能实体SSF接收到核心网设备发送的查询消息，所述查询消息携带终端设备的用户信息，且用于查询为所述终端设备提供业务服务的网络切片；
    所述SSF根据映射关系确定所述终端设备的用户信息对应的网络切片的切片信息，并将所述切片信息发送给所述核心网设备，所述映射关系用于描述不同终端设备的用户信息与不同的网络切片的切片信息之间的对应关系。
  7. 如权利要求6所述的方法，其特征在于，所述终端设备的用户信息包括如下信息中的至少一种：
    所述终端设备的国际移动用户识别码IMSI；
    所述终端设备的服务类型；
    所述终端设备的国际移动设备身份码IMEI。
  8. 一种网络切片的选择装置，其特征在于，包括：
    接收单元，用于接收到由终端设备发送的第一请求消息，所述第一请求消息用于请求为所述终端设备分配提供业务服务的网络切片；
    发送单元，用于向切片选择功能实体SSF发送查询消息，所述查询消息携带所述终端设备的用户信息，且用于查询能够为所述终端设备提供业务服务的网络切片；
    所述接收单元，还用于接收所述SSF发送的基于所述用户信息确定的能够提供所述终端设备所需业务服务的网络切片的切片信息；
    所述发送单元，还用于在所述接收单元接收到所述切片信息后，将所述第一请求消息转发给所述切片信息对应的网络切片，以使得所述切片信息对应的网络切片为所述终端设备提供业务服务。
  9. 如权利要求8所述的装置，其特征在于，所述终端设备的用户信息包括如下信息中的至少一种：
    所述终端设备的国际移动用户识别码IMSI；
    所述终端设备的服务类型；
    所述终端设备的国际移动设备身份码IMEI。
  10. 如权利要求8或9所述的装置，其特征在于，所述接收单元，还用于在所述发送单元将所述第一请求消息转发给所述切片信息对应的网络切片后，接收所述网络切片发送的所述网络切片的标识信息；
    所述发送单元，还用于将所述网络切片的标识信息发送给所述终端设备。
  11. 如权利要求10所述的装置，其特征在于，所述接收单元，还用于在所述发送单元将所述网络切片的标识信息发送给所述终端设备后，接收所述终端设备发送的第二请求消息，所述第二请求消息携带所述网络切片的标识信息；
    所述发送单元，还用于将所述接收单元接收到的所述第二请求消息转发给所述网络切片的标识信息对应的网络切片，以使得所述标识信息对应的网络切片为所述终端设备提供业务服务。
  12. 如权利要求8至11任一项所述的装置，其特征在于，所述切片信息包括如下信息中的至少一种：
    网络切片的标识信息，网络切片的类型，网络切片的地址信息。
  13. 一种网络切片的选择装置，其特征在于，包括：
    接收单元，用于接收核心网设备发送的查询消息，所述查询消息携带终端设备的用户信息，且用于查询为所述终端设备提供业务服务的网络切片；
    处理单元，用于根据映射关系确定所述终端设备的用户信息对应的网络切片的切片信息，所述映射关系用于描述不同终端设备的用户信息与不同的网络切片的切片信息之间的对应关系；
    发送单元，用于所述处理单元确定的所述切片信息发送给所述核心网设备。
  14. 如权利要求13所述的装置，其特征在于，所述终端设备的用户信息包括如下信息中的至少一种：
    所述终端设备的国际移动用户识别码IMSI；
    所述终端设备的服务类型；
    所述终端设备的国际移动设备身份码IMEI。
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