CN110838927B - Slice mapping remapping method and access network element - Google Patents

Abstract

The invention provides a slice mapping and remapping method and an access network element, belonging to the technical field of wireless communication. Wherein, the slice mapping and remapping method is applied to an access network element, and the method includes: receiving slice mapping information and/or slice remapping information of a slice. The technical scheme of the invention can solve the problem of slice remapping.

Description

Slice mapping remapping method and access network element

technical field

The present invention relates to the technical field of wireless communication, in particular to a slice mapping and remapping method and an access network element.

Background technique

5G network slicing is an important tool for operators to meet highly differentiated 5G vertical application scenarios and provide a horizontal support platform. Important features of network slicing include meeting differentiated business requirements and realizing resource sharing and isolation. Different network coverage areas adapt to different communication requirements, and different network slices can be configured, so there is a problem of network slice availability (slice availability). In the prior art, a process is designed for the transmission of network slicing information, enabling the exchange of slicing capability information and slicing information of the current session between sites.

Although the existing network supports the transmission of slice information from the process. However, for the network slicing strategy, for example, when the user terminal moves to a cell that does not support a current slice, the existing technology has not yet provided a mature solution.

Contents of the invention

The technical problem to be solved by the present invention is to provide a slice mapping and remapping method and an access network element, which can solve the slice remapping problem.

In order to solve the above technical problems, embodiments of the present invention provide technical solutions as follows:

In one aspect, a slice mapping and remapping method is provided, which is applied to a network element of an access network, and the method includes:

Slice mapping information and/or slice remapping information for a slice is received.

Further, the method also includes:

Remaps said slices to other slices.

Further, the slice mapping information includes slice mapping policy information; the slice remapping information includes slice remapping policy information.

Further, the network element of the access network performs slice remapping based on one or more of the following information: slice identification information, slice characteristic information, slice index information, and slice remapping policy.

Further, the slice identification information is network slice selection auxiliary information NSSAI; and/or

The slice characteristic information includes at least one of the following: service continuity information or slice continuity information, service QoS parameter information or slice QoS information; and/or

The slice index information is slice load information.

Further, the mapping policy of the slice is pre-configured in the network element of the access network or received from other devices;

The other devices include at least one of the following: user terminals, other access network elements, core network elements, and network managers.

Further, the network element of the access network uses a PDU session management process, a user context management process, a user mobility process, a paging process, a non-access stratum NAS message transmission process, an interface management process, a user capability management process, and/or The configuration delivery process receives the mapping policy for the slice.

Further, the network element of the access network responds through interface establishment, initial user context establishment, user context modification request, handover request, session establishment request, session modification request, session establishment notification, session modification notification, session establishment instruction, session modification Indication, handover command, path switch request confirmation PATH SWITH REQUESTACKNOWLEDGEMENT, paging, downlink NAS transmission, interface establishment response, RAN configuration update confirmation, AMF configuration update and/or user capability check response Receive the mapping policy of the slice sent by the core network element .

Further, the network element of the access network transmits a handover request, an access network paging, a user context extraction response, a secondary base station addition request, a secondary base station modification request, a secondary base station replacement request, a secondary base station replacement confirmation, an interface establishment request, an interface The response is established and/or the access network node updates the mapping strategy for receiving slices sent by other network elements of the access network.

Further, the network element of the access network receives the slice mapping policy sent by the user terminal through RRC signaling.

Further, the network element of the access network receives the slice mapping policy sent by the network management through a network management configuration message.

Further, the mapping strategy of the slice includes:

Remap the slice to other slices, and/or reject the slice.

Further, when the slice is not supported by the network element of the access network, and the network element of the access network is not configured with a slice support capability corresponding to the slice, the mapping policy of the slice further includes: the The network element of the access network temporarily configures the slice support capability corresponding to the slice and/or remaps the slice to another slice;

and / or

When the slice is not supported by the network element of the access network, and the network element of the access network has no resources to support the slice, the mapping policy of the slice further includes: the network element of the access network is the network element of the access network An address resolution protocol is set for the slice so that the slice can seize resources and/or remap the slice to other slices, and the requirements of the other slices for resources are lower than the requirements of the slice for resources;

When the serving access network element is not configured with the slice support capability, the slice mapping strategy further includes: the access network element temporarily configuring the slice support capability corresponding to the slice.

Further, the service QoS parameter information or slice QoS information includes service reliability parameter information and/or slice reliability information.

The embodiment of the present invention also provides an access network element, including a processor and a transceiver,

The transceiver is used for receiving slice mapping information and/or slice remapping information of a slice.

Further, the processor is configured to remap the slice to other slices.

Further, the slice mapping information includes slice mapping policy information; the slice remapping information includes slice remapping policy information.

Further, the processor is specifically configured to perform slice remapping based on one or more of the following information: slice identification information, slice feature information, slice index information, and slice remapping policies.

Further, the slice identification information is network slice selection auxiliary information NSSAI; and/or

The slice characteristic information includes at least one of the following: service continuity information or slice continuity information, service QoS parameter information or slice QoS information; and/or

The slice index information is slice load information.

Further, the mapping policy of the slice is pre-configured in the network element of the access network or received from other devices;

The other devices include at least one of the following: user terminals, other access network elements, core network elements, and network managers.

Further, the transceiver is specifically configured to implement a PDU session management process, a user context management process, a user mobility process, a paging process, a non-access stratum NAS message transmission process, an interface management process, a user capability management process, and/or The configuration delivery process receives the mapping policy for the slice.

Further, the transceiver is specifically used to establish an interface response, initial user context establishment, user context modification request, handover request, session establishment request, session modification request, session establishment notification, session modification notification, session establishment indication, session modification Indication, handover command, path switch request confirmation PATH SWITH REQUESTACKNOWLEDGEMENT, paging, downlink NAS transmission, interface establishment response, RAN configuration update confirmation, AMF configuration update and/or user capability check response Receive the mapping policy of the slice sent by the core network element .

Further, the transceiver is specifically configured to pass a handover request, an access network paging, a user context extraction response, a secondary base station addition request, a secondary base station modification request, a secondary base station replacement request, a secondary base station replacement confirmation, an interface establishment request, an interface The response is established and/or the access network node updates the mapping strategy for receiving slices sent by other network elements of the access network.

Further, the transceiver is specifically configured to receive the slice mapping strategy sent by the user terminal through RRC signaling.

Further, the transceiver is specifically configured to receive the slice mapping policy sent by the network management through a network management configuration message.

Further, the mapping strategy of the slice includes:

Remap the slice to other slices, and/or reject the slice.

Further, when the slice is not supported by the network element of the access network, and the network element of the access network is not configured with a slice support capability corresponding to the slice, the mapping policy of the slice further includes: the The network element of the access network temporarily configures the slice support capability corresponding to the slice and/or remaps the slice to another slice;

and / or

When the slice is not supported by the network element of the access network, and the network element of the access network has no resources to support the slice, the mapping policy of the slice further includes: the network element of the access network is the network element of the access network An address resolution protocol is set for the slice so that the slice can seize resources and/or remap the slice to other slices, and the requirements of the other slices for resources are lower than the requirements of the slice for resources;

When the serving access network element is not configured with the slice support capability, the slice mapping strategy further includes: the access network element temporarily configuring the slice support capability corresponding to the slice.

Further, the service QoS parameter information or slice QoS information includes service reliability parameter information and/or slice reliability information.

The embodiment of the present invention also provides an access network element, including a memory, a processor, and a computer program stored in the memory and operable on the processor; when the processor executes the program, the Slice map remap method as above.

An embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps in the slice mapping remapping method described above are implemented.

Embodiments of the present invention have the following beneficial effects:

In the above solution, during slice remapping, the network element of the access network receives the slice mapping information and/or slice remapping information of the slice, so that the access network remaps the slice to other slices according to the slice mapping information and/or slice remapping information. Slicing solves the problem of unbalanced distribution between sites based on network slicing, and the current network slicing of user terminals may face the problem of remapping.

Description of drawings

FIG. 1 is a schematic flowchart of a slice mapping remapping method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a user terminal moving out of a service area of a current slice in the prior art;

FIG. 3 is a schematic diagram of a slice mapping strategy according to an embodiment of the present invention;

4 is a schematic diagram of interaction between an access network element and other access network elements and core network elements according to an embodiment of the present invention;

5 is a schematic diagram of interaction between an access network element, a core network element, and a user terminal according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a network element of an access network according to an embodiment of the present invention.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

Embodiments of the present invention provide a slice mapping and remapping method and an access network element, which can solve the slice remapping problem.

An embodiment of the present invention provides a slice mapping and remapping method, which is applied to an access network element, as shown in FIG. 1 , and the method includes:

Step 101: Receive slice mapping information and/or slice remapping information of a slice.

In this embodiment, during slice remapping, the network element of the access network receives the slice mapping information and/or slice remapping information of the slice, so that the access network remaps the slice to Other slices solve the problem of remapping the current network slices of user terminals based on the unbalanced distribution of network slices among sites.

Further, the method also includes:

Remaps said slices to other slices.

Further, the slice mapping information includes slice mapping policy information; the slice remapping information includes slice remapping policy information.

Further, the network element of the access network performs slice remapping based on one or more of the following information: slice identification information, slice characteristic information, slice index information, and slice remapping policy.

Further, the slice identification information is network slice selection auxiliary information NSSAI; and/or

The slice characteristic information includes at least one of the following: service continuity information or slice continuity information, service QoS parameter information or slice QoS information; and/or

The slice index information is slice load information.

Further, the mapping policy of the slice is pre-configured in the network element of the access network or received from other devices;

The other devices include at least one of the following: user terminals, other access network elements, core network elements, and network managers.

Further, the network element of the access network uses a PDU session management process, a user context management process, a user mobility process, a paging process, a non-access stratum NAS message transmission process, an interface management process, a user capability management process, and/or The configuration delivery process receives the mapping policy for the slice.

Further, the network element of the access network responds through interface establishment, initial user context establishment, user context modification request, handover request, session establishment request, session modification request, session establishment notification, session modification notification, session establishment instruction, session modification Indication, handover command, path switch request confirmation PATH SWITH REQUESTACKNOWLEDGEMENT, paging, downlink NAS transmission, interface establishment response, RAN configuration update confirmation, AMF configuration update and/or user capability check response Receive the mapping policy of the slice sent by the core network element .

Further, the network element of the access network transmits a handover request, an access network paging, a user context extraction response, a secondary base station addition request, a secondary base station modification request, a secondary base station replacement request, a secondary base station replacement confirmation, an interface establishment request, an interface The response is established and/or the access network node updates the mapping strategy for receiving slices sent by other network elements of the access network.

Further, the network element of the access network receives the slice mapping policy sent by the user terminal through RRC signaling.

Further, the network element of the access network receives the slice mapping policy sent by the network management through a network management configuration message.

Further, the mapping strategy of the slice includes:

Remap the slice to other slices, and/or reject the slice.

Further, when the slice is not supported by the network element of the access network, and the network element of the access network is not configured with a slice support capability corresponding to the slice, the mapping policy of the slice further includes: the The network element of the access network temporarily configures the slice support capability corresponding to the slice and/or remaps the slice to another slice;

and / or

When the slice is not supported by the network element of the access network, and the network element of the access network has no resources to support the slice, the mapping policy of the slice further includes: the network element of the access network is the network element of the access network An address resolution protocol is set for the slice so that the slice can seize resources and/or remap the slice to other slices, and the requirements of the other slices for resources are lower than the requirements of the slice for resources;

When the serving access network element is not configured with the slice support capability, the slice mapping strategy further includes: the access network element temporarily configuring the slice support capability corresponding to the slice.

Further, the service QoS parameter information or slice QoS information includes service reliability parameter information and/or slice reliability information.

As shown in Figure 2, after the user terminal moves out of the service area of the current slice, it can accept the slice and occupy resources of other slices; it can also be remapped to other slices; it can also reject the slice. For example, for a slice service that requires user terminals to be isolated, once the user terminal leaves the coverage area of the slice, it may not be able to access the corresponding service. At this time, the network should reject the slice request of the user terminal. Or, possibly, under a certain slice, the user terminal is isolated from other slices. In order to implement the corresponding slice strategy, it may be necessary to exchange related information on the standard interface. However, when the user terminal needs to be remapped to other slices, what is the formulation and configuration of the mapping strategy of the slice, who makes the decision, who is assigned, what kind of interaction is involved, and what input is the mapping strategy of the slice obtained? What kind of mapping decision is made, what is the input, who will provide it, and what kind of interaction is involved, none of the existing technologies has provided a mature solution.

In order to solve the unbalanced distribution among network elements of the access network based on network slices, the current network slice of the user terminal may face the problem of remapping. Embodiments of the present invention provide a slice remapping solution. The network elements of the access network The slice support capability is configured according to slice information, slice mapping policies, and parameters required for slice mapping execution to support the slice and/or remap the slice to other slices.

Among them, the mapping strategy of the slice is the mapping relationship strategy between slices, or the mapping strategy of the slice specifies the default slice, or the mapping strategy of the slice is the mapping relationship between APP (business) and the slice, and the mapping strategy of the slice can also include the slice rejection Strategy.

Wherein, the information includes service information, and the service information includes at least one of the following: service continuity information and service QoS parameter information. The service QoS parameter information includes service reliability parameter information.

Further, the mapping strategy of the service information and the slice is the service quality index of the slice.

Further, the parameters required for executing the slice mapping include at least one of the following: a service identifier, and optional slice information for remapping.

As shown in FIG. 3 , the mapping policy of the slice includes: when the slice is not supported by the network element of the access network, and the network element of the access network is not configured with a slice support capability corresponding to the slice, The access network element temporarily configures the slice support capability corresponding to the slice and/or remaps the slice to other slices; when the slice is not supported by the access network element, and the access When the access network element does not have resources supporting the slice, the access network element sets an address resolution protocol for the slice so that the slice can seize resources and/or remap the slice to other slices, the Other slices have lower resource requirements than the slice.

In a specific embodiment, as shown in FIG. 4, the access network element (access network element two) of this embodiment inquires from other access network elements (access network element one) or core network elements Slice information, slice mapping policy, and/or, information required for slice mapping policy execution, such as APP ID, remaps optional slice information. In another specific embodiment, as shown in FIG. 5, the access network element (access network element 1) of this embodiment inquires the user terminal or the core network element about the slice information, the slice mapping strategy, and/or , information required for slice mapping strategy execution, such as APP ID, remaps optional slice information.

Further, the slice mapping strategy may also be pre-configured in the network elements of the access network.

Through the technical solution of this embodiment, the continuity problem in the moving process of the slice service can be solved. In a specific scenario, assuming that user 1 moves from base station 1 to base station 2, but its original slice is not supported by base station 2, the reasons include: base station 2 is not configured with the corresponding capability, then base station 2 can temporarily configure the corresponding slice support capability , or remap to other slices, or reject the slice; or base station 2 temporarily does not support the slice due to resource relations, then base station 2 can set a high ARP to ensure slice admission; slice; or refuse to slice. For some slices, it may be necessary to better ensure business continuity to ensure user experience. In this case, slices cannot be rejected.

The embodiment of the present invention also provides an access network element, as shown in FIG. 6 , including a processor 21 and a transceiver 22,

The transceiver 22 is configured to receive slice mapping information and/or slice remapping information of a slice.

In this embodiment, during slice remapping, the network element of the access network receives the slice mapping information and/or slice remapping information of the slice, so that the access network remaps the slice to Other slices solve the problem of remapping the current network slices of user terminals based on the unbalanced distribution of network slices among sites.

Further, the processor 21 is configured to remap the slice to other slices.

Further, the slice mapping information includes slice mapping policy information; the slice remapping information includes slice remapping policy information.

Further, the processor 21 is specifically configured to perform slice remapping based on one or more of the following information: slice identification information, slice characteristic information, slice index information, and slice remapping policies.

Further, the slice identification information is network slice selection auxiliary information NSSAI; and/or

The slice characteristic information includes at least one of the following: service continuity information or slice continuity information, service QoS parameter information or slice QoS information; and/or

The slice index information is slice load information.

Further, the mapping policy of the slice is pre-configured in the network element of the access network or received from other devices;

The other devices include at least one of the following: user terminals, other access network elements, core network elements, and network managers.

Further, the transceiver 22 is specifically used to pass the PDU session management process, the user context management process, the user mobility process, the paging process, the non-access stratum NAS message transmission process, the interface management process, the user capability management process and/or Or configure the delivery process to receive the mapping policy for the slice.

Further, the transceiver 22 is specifically used to establish a response through an interface, establish an initial user context, modify a user context request, switch a request, establish a session request, modify a session request, establish a session notification, modify a session notification, indicate a session establishment, Modification instruction, handover command, path switch request confirmation PATH SWITH REQUESTACKNOWLEDGEMENT, paging, downlink NAS transmission, interface establishment response, RAN configuration update confirmation, AMF configuration update and/or user capability check response Receiving mapping of slices sent by core network elements Strategy.

Further, the transceiver 22 is specifically configured to pass a handover request, an access network paging, a user context extraction response, a secondary base station addition request, a secondary base station modification request, a secondary base station replacement request, a secondary base station replacement confirmation, an interface establishment request, The interface establishes a response and/or the access network node updates the mapping strategy for receiving slices sent by other access network elements.

Further, the transceiver 22 is specifically configured to receive the slice mapping strategy sent by the user terminal through RRC signaling.

Further, the transceiver 22 is specifically configured to receive the slice mapping policy sent by the network management through a network management configuration message.

Further, the mapping strategy of the slice includes:

Remap the slice to other slices, and/or reject the slice.

Further, when the slice is not supported by the network element of the access network, and the network element of the access network is not configured with a slice support capability corresponding to the slice, the mapping policy of the slice further includes: the The network element of the access network temporarily configures the slice support capability corresponding to the slice and/or remaps the slice to another slice;

and / or

When the slice is not supported by the network element of the access network, and the network element of the access network has no resources to support the slice, the mapping policy of the slice further includes: the network element of the access network is the network element of the access network An address resolution protocol is set for the slice so that the slice can seize resources and/or remap the slice to other slices, and the requirements of the other slices for resources are lower than the requirements of the slice for resources;

When the serving access network element is not configured with the slice support capability, the slice mapping strategy further includes: the access network element temporarily configuring the slice support capability corresponding to the slice.

Further, the service QoS parameter information or slice QoS information includes service reliability parameter information and/or slice reliability information.

The embodiment of the present invention also provides an access network element, including a memory, a processor, and a computer program stored in the memory and operable on the processor; when the processor executes the program, the Slice map remap method as above.

An embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps in the slice mapping remapping method described above are implemented.

Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information. Information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Flash memory or other memory technology, Compact Disc Read-Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cartridge, tape magnetic disk storage or other magnetic storage device or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media excludes transitory computer-readable media, such as modulated data signals and carrier waves.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (28)

1. A method for slice mapping remapping, characterized in that it is applied to an access network element, and the method comprises: receiving slice mapping information and/or slice remapping information of a slice; Wherein, the slice remapping information includes slice remapping policy information, when the slice is not supported by the network element of the access network, and the network element of the access network is not configured with a slice support capability corresponding to the slice The remapping policy of the slice further includes: the network element of the access network temporarily configures a slice support capability corresponding to the slice and/or remaps the slice to another slice; The slice mapping information includes slice mapping policy information, and the slice mapping policy information includes: When the slice is not supported by the network element of the access network, and the network element of the access network has no resources to support the slice, the mapping policy of the slice further includes: the network element of the access network is the network element of the access network Prioritizing the slices enables the slices to preempt resources and/or remap the slices to other slices that have lower resource requirements than the slice. 2. The slice mapping remapping method according to claim 1, wherein the method further comprises: Remaps said slices to other slices. 3. The slice mapping remapping method according to claim 2, wherein the network element of the access network performs slice remapping based on one or more of the following information: slice identification information, slice feature information, slice index Information, slice remapping strategy. 4. The slice mapping remapping method according to claim 3, wherein the slice identification information is network slice selection auxiliary information NSSAI; and/or The slice characteristic information includes at least one of the following: service continuity information or slice continuity information, service QoS parameter information or slice QoS information; and/or The slice index information is slice load information. 5. The slice mapping and remapping method according to claim 1, wherein the slice mapping strategy is pre-configured in the network element of the access network or received from other devices; The other devices include at least one of the following: user terminals, other access network elements, core network elements, and network managers. 6. The slice mapping remapping method according to claim 5, wherein the network element of the access network passes through a PDU session management process, a user context management process, a user mobility process, a paging process, and a non-access stratum The NAS message transmission process, the interface management process, the user capability management process and/or the configuration transfer process receive the mapping policy of the slice. 7. The slice mapping remapping method according to claim 5, wherein the access network element responds through interface establishment, initial user context establishment, user context modification request, handover request, session establishment request, session modification Request, session establishment notification, session modification notification, session establishment indication, session modification indication, handover command, path switching request confirmation PATH SWITH REQUEST ACKNOWLEDGEMENT, paging, downlink NAS transmission, interface establishment response, RAN configuration update confirmation, AMF configuration update and /or the user capability check response receives the mapping policy of the slice sent by the network element of the core network. 8. The slice mapping remapping method according to claim 5, wherein the network element of the access network passes a handover request, an access network paging, a user context extraction response, a secondary base station addition request, and a secondary base station modification request , a SeNB replacement request, a SeNB replacement confirmation, an interface establishment request, an interface establishment response, and/or an access network node updating a mapping strategy for receiving slices sent by other access network elements. 9. The slice mapping and remapping method according to claim 5, wherein the network element of the access network receives the slice mapping strategy sent by the user terminal through RRC signaling. 10. The slice mapping and remapping method according to claim 5, wherein the network element of the access network receives the slice mapping strategy sent by the network management through a network management configuration message. 11. The slice mapping remapping method according to claim 1, wherein the mapping strategy of the slice comprises: Remap the slice to other slices, and/or reject the slice. 12. The slice mapping and remapping method according to claim 11, wherein the slice is not supported by the network element of the access network, and the network element of the access network is not configured corresponding to the slice When the slice support capability is used, the slice mapping strategy further includes: the network element of the access network temporarily configures the slice support capability corresponding to the slice and/or remaps the slice to another slice; When the serving access network element is not configured with the slice support capability, the slice mapping strategy further includes: the access network element temporarily configuring the slice support capability corresponding to the slice. 13. The slice mapping and remapping method according to claim 4, wherein the service QoS parameter information or slice QoS information includes service reliability parameter information and/or slice reliability information. 14. An access network element, comprising a processor and a transceiver, The transceiver is configured to receive slice mapping information and/or slice remapping information of a slice, where the slice remapping information includes slice remapping policy information, and the slice is not supported by the access network element, and When the network element of the access network is not configured with the slice support capability corresponding to the slice, the slice remapping strategy further includes: the network element of the access network temporarily configures the slice support capability corresponding to the slice and/or or remap said slice to some other slice; The slice mapping information includes slice mapping policy information; the slice mapping policy information includes: when the slice is not supported by the network element of the access network, and the network element of the access network does not have resources to support the slice , the mapping policy of the slice further includes: the network element of the access network sets a priority for the slice so that the slice can preempt resources and/or remap the slice to other slices, and the other slices have an impact on resources The requirement of is lower than the resource requirement of the slice. 15. The access network element according to claim 14, wherein the processor is configured to remap the slice to other slices. 16. The access network element according to claim 15, wherein the processor is specifically configured to perform slice remapping based on one or more of the following information: slice identification information, slice feature information, slice index Information, slice remapping strategy. 17. The network element of the access network according to claim 16, wherein the slice identification information is network slice selection auxiliary information NSSAI; and/or The slice characteristic information includes at least one of the following: service continuity information or slice continuity information, service QoS parameter information or slice QoS information; and/or The slice index information is slice load information. 18. The network element of the access network according to claim 14, wherein the mapping policy of the slice is pre-configured in the network element of the access network or received from other devices; The other devices include at least one of the following: user terminals, other access network elements, core network elements, and network managers. 19. The network element of the access network according to claim 18, wherein the transceiver is specifically used to pass the PDU session management process, the user context management process, the user mobility process, the paging process, the non-access stratum The NAS message transmission process, the interface management process, the user capability management process and/or the configuration transfer process receive the mapping policy of the slice. 20. The network element of the access network according to claim 18, wherein the transceiver is specifically used to establish a response through an interface, establish an initial user context, request a user context modification, switch a request, request a session establishment, modify a session Request, session establishment notification, session modification notification, session establishment indication, session modification indication, handover command, path switching request confirmation PATH SWITH REQUEST ACKNOWLEDGEMENT, paging, downlink NAS transmission, interface establishment response, RAN configuration update confirmation, AMF configuration update and /or the user capability check response receives the mapping policy of the slice sent by the network element of the core network. 21. The network element of the access network according to claim 18, wherein the transceiver is specifically configured to pass handover request, access network paging, user context extraction response, secondary base station addition request, secondary base station modification request , a SeNB replacement request, a SeNB replacement confirmation, an interface establishment request, an interface establishment response, and/or an access network node updating a mapping strategy for receiving slices sent by other access network elements. 22. The network element of the access network according to claim 18, wherein the transceiver is specifically configured to receive the mapping policy of the slice sent by the user terminal through RRC signaling. 23. The network element of the access network according to claim 18, wherein the transceiver is specifically configured to receive the slice mapping policy sent by the network management through a network management configuration message. 24. The network element of the access network according to claim 14, wherein the mapping policy of the slice comprises: Remap the slice to other slices, and/or reject the slice. 25. The network element of the access network according to claim 24, wherein the slice is not supported by the network element of the access network, and the network element of the access network is not configured with the network element corresponding to the slice When the slice support capability is used, the slice mapping strategy further includes: the network element of the access network temporarily configures the slice support capability corresponding to the slice and/or remaps the slice to another slice; When the serving access network element is not configured with the slice support capability, the slice mapping strategy further includes: the access network element temporarily configuring the slice support capability corresponding to the slice. 26. The access network element according to claim 17, wherein the service QoS parameter information or slice QoS information includes service reliability parameter information and/or slice reliability information. 27. An access network element, comprising a memory, a processor, and a computer program stored in the memory and operable on the processor; it is characterized in that, when the processor executes the program, the following The slice mapping remapping method according to any one of claims 1-13. 28. A computer-readable storage medium, on which a computer program is stored, wherein when the program is executed by a processor, the steps in the slice mapping remapping method according to any one of claims 1-13 are realized .

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