WO2023056938A1 - 一种小区重选的方法及通信装置 - Google Patents

一种小区重选的方法及通信装置 Download PDF

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Publication number
WO2023056938A1
WO2023056938A1 PCT/CN2022/123824 CN2022123824W WO2023056938A1 WO 2023056938 A1 WO2023056938 A1 WO 2023056938A1 CN 2022123824 W CN2022123824 W CN 2022123824W WO 2023056938 A1 WO2023056938 A1 WO 2023056938A1
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Prior art keywords
network slice
terminal device
slice group
cell
priority
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PCT/CN2022/123824
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English (en)
French (fr)
Inventor
张柔佳
孙飞
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华为技术有限公司
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Priority claimed from CN202210017906.9A external-priority patent/CN115955703A/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2023056938A1 publication Critical patent/WO2023056938A1/zh

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    • 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
    • H04W36/08—Reselecting an access point

Definitions

  • the present application relates to the field of wireless technologies, and in particular to a cell reselection method and communication device.
  • the present application provides a cell reselection method and communication device, which are applied in a network slicing scenario.
  • the first aspect of the present application provides a method for cell reselection, the method is executed by a terminal device, or the method is executed by some components in the terminal device (such as a processor, a chip or a chip system, etc.), or the method is also It can be realized by a logic module or software that can realize all or part of the functions of the terminal equipment.
  • the method for cell reselection is performed by a terminal device as an example for description.
  • the terminal device determines the priority information of the target network slice group, and the priority information is used to indicate the priority of the target network slice group; the terminal device determines the target network slice group based on the priority information.
  • the associated cell frequency points perform cell reselection.
  • the terminal device determines the target network slice group based on the priority information
  • the associated cell frequency points perform cell reselection.
  • the terminal device performs cell reselection on the frequency point of the cell associated with the target network slice group determined based on the priority of the target network slice group.
  • the target network slice determined by the terminal device based on the priority information
  • the scheme of performing cell reselection on the frequency points of the cells associated with the group enables terminal devices to perform cell reselection at the granularity of cell reselection based on the network slice group. Therefore, while the cell reselection solution is adapted to the scenario of communication based on network slice groups, it can also improve the success rate of cell reselection and communication efficiency.
  • the terminal device determines the cell reselection mode of the target cell based on the priority information of the network slice group, and the network device uses the cell reselection information (such as cell frequency point information) associated with the network slice group as a piece of information sent to the terminal device , and use the slice information of the network slice contained in the network slice group as another piece of information sent to the terminal device.
  • the cell reselection information such as cell frequency point information
  • the target network slice group includes one or more network slice groups, where each network slice group includes one or more network slices.
  • the second aspect of the present application provides a method for cell reselection, the method is executed by a terminal device, or the method is executed by some components in the terminal device (such as a processor, a chip or a chip system, etc.), or the method is also It can be realized by a logic module or software that can realize all or part of the functions of the terminal equipment.
  • the method for cell reselection is performed by a terminal device as an example for description. In this method, the terminal device determines the cell frequency point associated with the target network slice group; the terminal device performs cell reselection based on the cell frequency point associated with the target network slice group.
  • the terminal device performs cell reselection based on the frequency point of the cell associated with the target network slice group.
  • the terminal device performs cell reselection based on the frequency point of the cell associated with the target network slice group.
  • the terminal device in the scenario of network slicing, when the cell frequency point used by the terminal device in the process of cell reselection is configured based on the granularity of the network slice group, the terminal device based on the cell frequency point associated with the target network slice group
  • the cell reselection solution enables the terminal device to perform cell reselection with the network slice group as the granularity of cell reselection. Therefore, while the cell reselection solution is adapted to the scenario of communication based on network slice groups, it can also improve the success rate of cell reselection and communication efficiency.
  • the number of network slice groups included in the target network slice group is one.
  • the number of network slice groups included in the target network slice group is multiple.
  • the process of the terminal device performing cell reselection based on the cell frequency associated with the target network slice group may include, the terminal device determining priority information of the target network slice group; wherein the priority information is used to indicate the target network slice group priority; the terminal device performs cell reselection based on the cell frequency associated with the target network slice group determined by the priority information.
  • the target network slice group includes a network slice that the terminal device expects to access.
  • the target network slice group includes the network slice that the terminal device expects to access.
  • the terminal device determines the target network slice group based on the network slice that the terminal device expects to access.
  • the terminal device may determine the target network slice group in advance based on one or more network slices that the terminal device expects to access.
  • the target network slice group determined by the terminal device includes the network slice group that the terminal device expects to access.
  • the terminal device can communicate in the target cell to obtain the network slice corresponding to the network slice that the terminal device expects to access.
  • a (business-related) web service A (business-related) web service.
  • the network slice that the terminal device expects to access includes at least one of the following: allowed (Allowed) single network slice selection assistance information, The network slice indicated by the NSSAI) cell, the network slice indicated by the requested NSSAI (Requested NSSAI) cell, the network slice indicated by the suspended NSSAI (suspended NSSAI) cell, or the network slice indicated by the mobile originated traffic (MO traffic) business-related network slicing.
  • the terminal device can determine the network slice that the terminal device expects to access based on the network slice indicated in the above multiple ways (denoted as the target network slice) in different scenarios. For example, for a terminal device in an idle (Idle) state, the terminal device may determine one or more network slices indicated by the allowed NSSAI as the network slice that the terminal device expects to access; For a terminal device in the (Inactive) state, the terminal device may determine one or more network slices indicated by the suspended NSSAI as the network slice that the terminal device expects to access. Therefore, multiple implementations are provided to realize communication in different scenarios.
  • the target network slice group includes a default network slice (or called a network slice corresponding to the default NSSAI).
  • the target network slice group includes a default network slice group
  • the default network slice group includes one or more default network slices.
  • the target network slice group is (at least) determined by the correspondence between network slices and network slice groups, and the correspondence between network slices and network slice groups (For the convenience of reference later, it is recorded as the first corresponding relationship)
  • the target network slice group includes a default network slice, where the first One correspondence is a correspondence between a network slice and a network slice group, and the first area includes a registration area (registration area, RA), a tracking area (tracking area, TA) or a public land mobile network (public land mobile network, PLMN) area.
  • the corresponding relationship (or mapping relationship, association relationship, etc.) between the network slice and the network slice group specifically indicates the network slice group to which the network slice belongs, or indicates the network slice included in the network slice group.
  • the terminal device may be in the first corresponding relationship between the terminal device
  • the terminal device determines that the target network slice group includes a default network slice.
  • the terminal device determines the default network slice group including the default network slice as the target network slice group. So that the terminal device performs cell reselection based on the cell frequency associated with the default network slice group provided by the network device in the first area, so as to avoid cell reselection failure.
  • the default network slice group includes one or more default network slices.
  • the terminal device may determine that the target network slice group includes a default network slice group when the first correspondence is invalid in the first area where the terminal device is located.
  • the network slices included in the default network slice group may specifically be one or more default network slices (Default Slice) (defined by the operator).
  • the first correspondence may be a correspondence between the network slice and the network slice group that the terminal device received an instruction from the network device last time.
  • the first correspondence is associated with a second area, where the second area may include an RA, TA, or PLMN area.
  • the second area may include an RA, TA, or PLMN area.
  • different (RA, TA or PLMN) regions may be associated with different correspondences.
  • the corresponding relationship between network slices and network slice groups may be different.
  • the determining the target network slice group by the first correspondence may also include: the terminal device determines the target network slice group by the first correspondence.
  • the terminal device receives a system message, and the system message may include information indicating the first area where the terminal device is currently located.
  • the terminal device determines that the first correspondence is valid; when the first area indicated by the system message is associated with the first correspondence When the second areas are different, the terminal device determines that the first correspondence is invalid.
  • each network slice group in the target network slice group includes one or more target network slices that the terminal device expects to access, and the terminal device performs cell reselection based on the priority of the target network slice group to After the target cell, the terminal device can communicate in the target cell to obtain the network service (service-related) corresponding to the network slice that the terminal device expects to access.
  • the network service service-related
  • the terminal device can directly determine the target cell including multiple target network slices based on the target network slice group, so that the terminal device can be more Quickly obtain more types of network services in target cells that support multiple target network slice communications to improve user experience.
  • the terminal device determining the priority information of the target network slice group includes: the terminal device receiving the priority information from the network device. In other words, the terminal device determines the priority information based on the indication of the network device.
  • the priority information is carried in first indication information, and the first indication information is at least used to indicate the priority information.
  • the first indication information is also used to indicate priorities of network slice groups other than the target network slice group.
  • the terminal device may determine the priority information of the target network slice group based on the information sent by the network device.
  • the terminal device can specify the network slice group configured by the network device based on the indication of the network device (for example, the first indication information), so as to improve the success rate of subsequent cell reselection.
  • determining the priority information of the target network slice group by the terminal device includes: determining the priority information of the target network slice group by the terminal device priority information.
  • the historically used network slice information includes the number of historically used network slices, the frequency of historically used network slices, and the like.
  • the terminal device may determine the priority information of the target network slice group based on the network slice information historically used by the terminal device.
  • the historically used network slicing information can reflect the specific information of the terminal device (such as service preference information, duration, etc.) to a certain extent
  • the priority determined by the terminal device based on the historically accessed network slicing information information to perform cell reselection, and the determined target cell can provide network services corresponding to the specific information of the terminal device, so as to improve user experience.
  • the priority information is determined by the quantity and/or priority information of network slices included in each network slice group in the target network slice group.
  • the terminal device determining the priority information of the target network slice group includes: the terminal device determining the priority information based on first information from the network device, where the first information is used to indicate that each of the target network slice groups Quantity and/or priority information of network slices included in the network slice group.
  • the priority information includes priority levels, priority values, and the like.
  • the terminal device may determine the priority information of the target network slice group based on the number and/or priority information of the network slices contained in each network slice group in the target network slice group. In other words, the terminal device determines the priority information based on the network slice information (such as priority information, quantity information, etc.) included in the target network slice group.
  • the first information is determined based on the indication of the network device, so that the terminal device can clarify the information of the network slice included in the network slice group configured by the network device based on the indication of the network device (that is, the first information), and improve Success rate of subsequent cell reselection.
  • the first information includes at least one of the following:
  • the priority information of the network slices contained in each network slice group In the target network slice group, the priority information of the network slices contained in each network slice group; or,
  • the priority value of the network slice contained in each network slice group is the priority value of the network slice contained in each network slice group.
  • the number of network slices contained in each network slice group is the number of network slices contained in each network slice group.
  • the priority information of the target network slice contained in each network slice group In the target network slice group, the priority information of the target network slice contained in each network slice group; or,
  • the priority value of the target network slice contained in each network slice group is the priority value of the target network slice contained in each network slice group.
  • the number of target network slices contained in each network slice group is the number of target network slices contained in each network slice group.
  • the first information may specifically be a combination of the above one or more pieces of information. While improving the implementation flexibility of the terminal device, it may be obtained from multiple dimensions (such as the dimension of priority information, the dimension of quantity information, etc.) ) information provides the basis for determining priority information.
  • the terminal device performing cell reselection based on the cell frequency point associated with the target network slice group determined by the priority information includes: the terminal device based on the target The cell frequency point performs cell reselection, wherein the target cell frequency point is one or more cell frequency points associated with the network slice group with the highest priority among the target network slice groups indicated by the priority information.
  • the terminal device if the terminal device cannot find a neighboring cell that meets the residency conditions after scanning based on the frequency point of the target cell, the terminal device One or more cell frequency points associated with the network slice group with the second highest priority (or other priority) in the network slice group undergo cell reselection.
  • the terminal device can specifically select the network slice group associated with the highest priority network slice group Cell reselection is performed on one or more cell frequencies, so as to improve the success rate of the terminal device performing cell reselection.
  • the terminal device performing cell reselection based on the target cell frequency includes: the terminal device performing cell reselection based on a frequency point priority corresponding to the target cell frequency point.
  • the method further includes: the terminal device receiving instruction information from the network device, where the instruction information is used to indicate cell reselection based on the frequency point of the target cell After the failure, cell reselection is performed based on the frequency point priority corresponding to the frequency point of the first cell; wherein the frequency point of the first cell includes at least one of the following:
  • One or more cell frequency points associated with network slice groups other than the highest priority network slice group in the target network slice group indicated by the priority information are selected from the highest priority network slice group in the target network slice group indicated by the priority information.
  • the terminal device can also receive the indication information, so that in the process of performing cell reselection based on the frequency point of the target cell, the terminal equipment can clearly indicate that the cell reselection based on the frequency point of the target cell fails based on the indication information. Afterwards, the terminal device may perform cell reselection based on the frequency point priority corresponding to the frequency point of the first cell. In the case that the terminal device fails to perform cell reselection based on the frequency point of the target cell, it can further perform cell reselection based on the indication information, so as to further improve the success rate of performing cell reselection by the terminal device.
  • the cell frequencies not associated with network slicing may also be expressed as: cell frequencies not determined based on network slicing or cell frequencies not determined based on network slicing.
  • the cell frequencies not associated with the network slicing group may also be expressed as: the cell frequency not determined based on the network slicing group or the cell frequency not determined based on the network slicing group.
  • the network slice set may include one or more network slices, where each network slice may be associated with one or more cell frequency points; in addition, when the network slice set includes multiple network slices, the terminal The device may determine multiple cell frequencies based on the multiple network slices, so as to improve the success rate of the terminal device performing cell reselection based on the cell frequencies associated with the network slice set.
  • the set of network slice groups may include one or more network slice groups, wherein each network slice group may be associated with one or more cell frequency points; in addition, when the set of network slice groups includes multiple network slice groups In this way, the terminal device can determine multiple cell frequency point groups based on the multiple network slice groups, so as to improve the success rate of the terminal device performing cell reselection based on the cell frequency points associated with the network slice group set.
  • the network slice set may include other network slices besides the network slice that the terminal device expects to access, which is not limited here.
  • the network slice group set may also include other network slice groups, which is not limited here.
  • the network slice identifier (such as network slice index, network slice name, etc.) contained in the network slice set can be implemented in the form of a list, which can be called a slice list (Slice List), or implemented in other forms, such as Mathematical relational expressions, bitmaps, etc. or other forms are not limited here.
  • the network slice group identifiers (such as network slice group index, network slice group name, etc.) contained in the network slice group set can be implemented in the form of a list, and the list can be called a slice group list (Slice Group List), Or implemented in other forms, such as mathematical relational expressions, bitmaps, etc., or other forms, which are not limited here.
  • the first cell frequency does not include one or more cell frequencies associated with network slice groups other than the network slice group with the highest priority in the target network slice group indicated by the priority information.
  • the terminal device's cell reselection based on the target cell frequency point includes:
  • the terminal device After the terminal device determines that cell reselection based on the frequency point of the target cell fails, the terminal device performs cell reselection based on the frequency point of the second cell;
  • the terminal device After the terminal device determines that cell reselection based on the second cell frequency fails, the terminal device performs cell reselection based on the first cell frequency.
  • the indication information includes at least one of the following: the number of cell reselections based on the first cell frequency, the number of cell reselections based on the first cell frequency The duration of selection, the start time of cell reselection based on the first cell frequency point or the end time of cell reselection based on the first cell frequency point.
  • the indication information received by the terminal device may include the above "at least one" cell reselection implementation, so that the terminal device can Based on the indication information, an implementation manner of performing cell reselection based on the frequency point of the first cell is specified further based on the indication information, so as to further improve the success rate of performing cell reselection by the terminal device.
  • the third aspect of the present application provides a cell reselection method, the method is executed by a network device, or the method is executed by some components in the network device (such as a processor, a chip or a chip system, etc.), or the method is also It can be implemented by a logic module or software that can realize all or part of the network device functions.
  • the method for cell reselection is performed by a network device as an example for description.
  • the network device determines first indication information, the first indication information is used to indicate the priority information of the target network slice group, and the priority information is used to indicate the priority of the target network slice group;
  • the terminal device sends the first indication information.
  • the first indication information sent by the network device is used to indicate the priority of the target network slicing group, so that the terminal device performs the cell frequency point associated with the target network slicing group determined by the first indication information.
  • Re-election when the cell frequency point used by the terminal device in the process of cell reselection is configured based on the granularity of the network slice group, the target network determined by the terminal device based on the first indication information.
  • the solution of cell reselection at the cell frequency associated with the slice group enables the terminal device to perform cell reselection with the network slice group as the granularity of cell reselection. Therefore, while the cell reselection solution is adapted to the scenario of communication based on network slice groups, it can also improve the success rate of cell reselection and communication efficiency.
  • the terminal device may also enable the terminal device to specify the network The network slice group configured by the device improves the success rate of subsequent cell reselection.
  • the first indication information is also used to indicate priorities of network slice groups other than the target network slice group.
  • the method further includes: the network device sending indication information to the terminal device, where the indication information is used to indicate that after cell reselection based on the frequency point of the target cell fails, based on the second The frequency point priority corresponding to a cell frequency point is used for cell reselection; wherein, the first cell frequency point includes at least one of the following:
  • One or more cell frequency points associated with network slice groups other than the highest priority network slice group in the target network slice group indicated by the priority information are selected from the highest priority network slice group in the target network slice group indicated by the priority information.
  • the network slice set may include other network slices besides the network slice that the terminal device expects to access, which is not limited here.
  • the network slice group set may also include other network slice groups, which is not limited here.
  • the network slice identifier (such as network slice index, network slice name, etc.) contained in the network slice set can be implemented in the form of a list, which can be called a slice list (Slice List), or implemented in other forms, such as Mathematical relational expressions, bitmaps, etc. or other forms are not limited here.
  • the network slice group identifiers (such as network slice group index, network slice group name, etc.) contained in the network slice group set can be implemented in the form of a list, and the list can be called a slice group list (Slice Group List), Or implemented in other forms, such as mathematical relational expressions, bitmaps, etc., or other forms, which are not limited here.
  • the network device can also send the indication information to the terminal equipment, so that the terminal equipment can clearly perform cell reselection based on the frequency point of the target cell based on the indication information in the process of performing cell reselection based on the frequency point of the target cell.
  • the terminal device may perform cell reselection based on the frequency point priority corresponding to the frequency point of the first cell.
  • the terminal device fails to perform cell reselection based on the frequency point of the target cell, it can further perform cell reselection based on the indication information, so as to further improve the success rate of performing cell reselection by the terminal device.
  • the indication information includes at least one of the following: the number of cell reselections based on the first cell frequency, the duration of cell reselection based on the first cell frequency, The start time of cell reselection based on the first cell frequency or the end time of cell reselection based on the first cell frequency.
  • the instruction information sent by the network device may include the above "at least one" cell reselection implementation, so that the terminal device can use the instruction based on the failure of cell reselection based on the target cell frequency.
  • the information further specifies an implementation manner of performing cell reselection based on the frequency point of the first cell based on the indication information, so as to further improve the success rate of performing cell reselection by the terminal device.
  • a fourth aspect of the present application provides a communication device, which can implement the method in the first aspect or any possible implementation manner of the first aspect.
  • the apparatus includes corresponding units or modules for performing the above method.
  • the units or modules included in the device can be realized by software and/or hardware.
  • the device may be a terminal device, or the device may be a component in the terminal device (such as a processor, a chip or a chip system, etc.), or the device may also be a logic module or logic module capable of realizing all or part of the functions of the terminal device. software.
  • the communication device includes at least a processing unit
  • the processing unit is configured to determine priority information of the target network slice group, where the priority information is used to indicate the priority of the target network slice group;
  • the processing unit is configured to perform cell reselection based on the cell frequency associated with the target network slice group determined by the priority information.
  • a fifth aspect of the present application provides a communications device, which can implement the method in the second aspect or any possible implementation manner of the second aspect.
  • the apparatus includes corresponding units or modules for performing the above method.
  • the units or modules included in the device can be realized by software and/or hardware.
  • the device may be a terminal device, or the device may be a component in the terminal device (such as a processor, a chip or a chip system, etc.), or the device may also be a logic module or logic module capable of realizing all or part of the functions of the terminal device. software.
  • the communication device includes at least a processing unit
  • the processing unit is used to determine the cell frequency point associated with the target network slice group
  • the processing unit is configured to perform cell reselection based on the cell frequency point associated with the target network slice group.
  • the number of network slice groups included in the target network slice group is one.
  • the number of network slice groups included in the target network slice group is multiple.
  • the process of the terminal device performing cell reselection based on the cell frequency associated with the target network slice group may include, the terminal device determining priority information of the target network slice group; wherein the priority information is used to indicate the target network slice group priority; the terminal device performs cell reselection based on the cell frequency associated with the target network slice group determined by the priority information.
  • the target network slice group includes a network slice that the terminal device expects to access.
  • the network slice that the terminal device expects to access includes at least one of the following: the network slice indicated by the allowed NSSAI information element, the network slice indicated by the requested NSSAI information element The network slice indicated by the suspended NSSAI information element or the network slice related to the mobile initiated traffic service.
  • the target network slice group includes a default network slice.
  • the target network slice group is determined by the corresponding relationship between the network slice and the network slice group, and the corresponding relationship between the network slice and the network slice group is determined in the terminal
  • the target network slice group includes a default network slice, where the first area includes a registration area (registration area, RA), a tracking area (tracking area, TA) or a public land mobile network ( public land mobile network, PLMN) area.
  • the device further includes a transceiver unit; the processing unit, configured to determine the priority information of the target network slice group includes:
  • the processing unit is configured to receive the priority information from the network device through the transceiver unit.
  • the processing unit, used to determine the priority information of the target network slice group includes:
  • the processing unit is configured to determine the priority information based on historically used network slice information.
  • the priority information is determined by the quantity and/or priority information of network slices contained in each network slice group in the target network slice group.
  • the processing unit configured to perform cell reselection based on the cell frequency point associated with the target network slice group determined by the priority information includes:
  • the processing unit is configured to perform cell reselection based on a target cell frequency, where the target cell frequency is one or more cell frequencies associated with a network slice group with the highest priority in the target network slice group.
  • the transceiving unit is further configured to receive indication information, where the indication information is used to indicate that after the cell reselection based on the target cell frequency fails, the first The frequency point priority corresponding to the cell frequency point is used for cell reselection; wherein, the first cell frequency point includes at least one of the following:
  • One or more cell frequency points associated with network slice groups other than the highest priority network slice group in the target network slice group indicated by the priority information are selected from the highest priority network slice group in the target network slice group indicated by the priority information.
  • the indication information includes at least one of the following: the number of cell reselections based on the first cell frequency, the number of cell reselections based on the first cell frequency The duration of selection, the start time of cell reselection based on the first cell frequency point or the end time of cell reselection based on the first cell frequency point.
  • a sixth aspect of the present application provides a communications device, which can implement the method in the above third aspect or any possible implementation manner of the third aspect.
  • the apparatus includes corresponding units or modules for performing the above method.
  • the units or modules included in the device can be realized by software and/or hardware.
  • the device may be a network device, or the device may be a component in the network device (such as a processor, a chip or a chip system, etc.), or the device may also be a logic module or logic module capable of realizing all or part of the functions of the network device. software.
  • the communication device includes a processing unit and a transceiver unit;
  • the processing unit is configured to determine priority information of the target network slice group, where the priority information is used to indicate the priority of the target network slice group;
  • the transceiver unit is used to send the priority information.
  • the transceiving unit is further configured to send indication information, where the indication information is used to indicate that after the cell reselection based on the frequency point of the target cell fails, the frequency point of the first cell corresponds to cell reselection according to the priority of the frequency point; wherein, the frequency point of the first cell includes at least one of the following:
  • One or more cell frequency points associated with network slice groups other than the highest priority network slice group in the target network slice group indicated by the priority information are selected from the highest priority network slice group in the target network slice group indicated by the priority information.
  • the indication information includes at least one of the following: the number of cell reselections based on the first cell frequency, the duration of cell reselection based on the first cell frequency, The start time of cell reselection based on the first cell frequency or the end time of cell reselection based on the first cell frequency.
  • the seventh aspect of the embodiment of the present application provides a communication device, including at least one processor, the at least one processor is coupled to a memory; the memory is used to store programs or instructions; the at least one processor is used to execute the programs or instructions, To enable the device to implement the method described in the first aspect or any possible implementation of the first aspect, or to enable the device to implement the method described in the second aspect or any possible implementation of the second aspect method, or to enable the device to implement the method described in the third aspect or any possible implementation manner of the third aspect.
  • the eighth aspect of the embodiment of the present application provides a computer-readable storage medium that stores one or more computer-executable instructions.
  • the processor executes any one of the first aspect or the first aspect.
  • the ninth aspect of the embodiment of the present application provides a computer program product (or computer program) storing one or more computers.
  • the processor executes the above-mentioned first aspect or the first
  • the method in any possible implementation manner of the second aspect or the processor executes the method described in the second aspect or any possible implementation manner of the second aspect, or the processor executes the method described in the third aspect or the first aspect The method described in any one possible implementation manner of the three aspects.
  • the tenth aspect of the embodiment of the present application provides a chip system, where the chip system includes at least one processor, configured to support the communication device to implement the functions involved in the first aspect or any possible implementation manner of the first aspect; Or, used to support the communication device to implement the functions involved in the second aspect or any possible implementation of the second aspect; or, used to support the communication device to implement the third aspect or any possible implementation of the third aspect The functions involved in the implementation.
  • the chip system may further include a memory for storing necessary program instructions and data of the communication device.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the chip system further includes an interface circuit, and the interface circuit provides program instructions and/or data for the at least one processor.
  • the eleventh aspect of the embodiment of the present application provides a communication system, the communication system includes the communication device of the fourth aspect and the communication device of the sixth aspect, and/or, the communication system includes the communication device of the fifth aspect and The communication device of the sixth aspect, and or, the communication system includes the communication device of the seventh aspect above.
  • the technical effects brought about by any one of the design methods from the third aspect to the ninth aspect can refer to the technical effects brought about by the different implementation methods in the above-mentioned first aspect or the second aspect, and will not be repeated here.
  • the terminal device After the terminal device determines the priority information used to indicate the target network slice group, the terminal device performs cell reselection, and the target determined by the terminal device based on the priority information
  • the cell frequency point associated with the network slice group performs cell reselection.
  • the terminal device performs cell reselection on the frequency point of the cell associated with the target network slice group determined based on the priority of the target network slice group.
  • the target network slice determined by the terminal device based on the priority information
  • the scheme of performing cell reselection on the frequency points of the cells associated with the group enables terminal devices to perform cell reselection at the granularity of cell reselection based on the network slice group. Therefore, while the cell reselection solution is adapted to the scenario of communication based on network slice groups, it can also improve the success rate of cell reselection and communication efficiency.
  • Fig. 1 is a schematic diagram of the communication system provided by the present application.
  • FIG. 2 is a schematic diagram of a cell reselection method provided by the present application.
  • FIG. 3a is a schematic diagram of a communication scenario provided by the present application.
  • FIG. 3b is another schematic diagram of the communication scenario provided by the present application.
  • FIG. 4 is another schematic diagram of the cell reselection method provided by the present application.
  • FIG. 5 is another schematic diagram of the cell reselection method provided by the present application.
  • FIG. 6 is another schematic diagram of the cell reselection method provided by the present application.
  • FIG. 7 is another schematic diagram of the cell reselection method provided by the present application.
  • FIG. 8 is another schematic diagram of a communication scenario provided by the present application.
  • FIG. 9 is another schematic diagram of the cell reselection method provided by the present application.
  • Fig. 10a is another schematic diagram of the cell reselection method provided by the present application.
  • Fig. 10b is another schematic diagram of the cell reselection method provided by the present application.
  • FIG. 11 is another schematic diagram of the cell reselection method provided by the present application.
  • Fig. 12a is another schematic diagram of the cell reselection method provided by the present application.
  • Fig. 12b is another schematic diagram of the cell reselection method provided by the present application.
  • Fig. 13a is another schematic diagram of the cell reselection method provided by the present application.
  • Fig. 13b is another schematic diagram of the cell reselection method provided by the present application.
  • FIG. 14 is another schematic diagram of a communication scenario provided by the present application.
  • Fig. 15a is another schematic diagram of the cell reselection method provided by the present application.
  • Fig. 15b is another schematic diagram of the cell reselection method provided by the present application.
  • FIG. 16 is a schematic diagram of a communication device provided by the present application.
  • FIG. 17 is another schematic diagram of the communication device provided by the present application.
  • FIG. 18 is another schematic diagram of the communication device provided by the present application.
  • Terminal device it may be a wireless terminal device capable of receiving network device scheduling and instruction information, and a wireless terminal device may be a device that provides voice and/or data connectivity to users, or a handheld device with a wireless connection function, or Other processing devices connected to the wireless modem.
  • a terminal device can communicate with one or more core networks or the Internet via a radio access network (RAN), and the terminal device can be a mobile terminal device, such as a mobile phone (or "cellular" phone, mobile phone (mobile phone) phone)), computers and data cards, such as portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which exchange voice and/or data with the radio access network.
  • a mobile terminal device such as a mobile phone (or "cellular" phone, mobile phone (mobile phone) phone)
  • computers and data cards such as portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which exchange voice and/or data with the radio access network.
  • PCS personal communication service
  • SIP Session Initiation Protocol
  • WLL wireless local loop
  • PDAs personal digital assistants
  • Pad tablet Computer
  • the wireless terminal equipment may also be called a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a mobile station (mobile station, MS), a remote station (remote station), an access point ( access point (AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), subscriber station (subscriber station, SS), user terminal equipment (customer premises equipment, CPE), terminal (terminal), user equipment (user equipment, UE), mobile terminal (mobile terminal, MT), etc.
  • the terminal device may also be a wearable device and a next-generation communication system, for example, a terminal device in a 5G communication system or a terminal device in a future evolved public land mobile network (PLMN).
  • PLMN public land mobile network
  • Network device it can be a device in a wireless network, for example, a network device can be a radio access network (radio access network, RAN) node (or device) that connects a terminal device to a wireless network, and can also be called a base station .
  • RAN radio access network
  • some examples of RAN equipment are: generation Node B (generation Node B, gNodeB), transmission reception point (transmission reception point, TRP), evolved Node B (evolved Node B, eNB) and wireless network in the 5G communication system.
  • the network device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a RAN device including a CU node and a DU node.
  • the network device can send configuration information (for example, carried in a scheduling message and/or an indication message) to the terminal device, and the terminal device further performs network configuration according to the configuration information, so that the network configuration between the network device and the terminal device is aligned; or , through the network configuration preset in the network device and the network configuration preset in the terminal device, the network configurations between the network device and the terminal device are aligned.
  • “alignment” refers to when there is an interaction message between the network device and the terminal device, the carrier frequency of the interaction message sent and received by the two, the determination of the type of the interaction message, the meaning of the field information carried in the interaction message, or The understanding of other configurations of interactive messages is the same.
  • the network equipment may be other devices that provide wireless communication functions for the terminal equipment.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the network device. For the convenience of description, the embodiment of the present application does not limit it.
  • the network equipment may also include core network equipment.
  • the core network equipment includes, for example, a mobility management entity (mobility management entity, MME) in a 4G network, a home subscriber server (home subscriber server, HSS), and a serving gateway (serving gateway, S-GW). ), policy and charging rules function (Policy and charging rules function, PCRF), public data network gateway (public data network gateway, PDN gateway, P-GW); access and mobility management function (access and mobility management) in 5G network function, AMF), user plane function (user plane function, UPF) or session management function (session management function, SMF) and other network elements.
  • the core network equipment may also include other core network equipment in the 5G network and the next-generation network of the 5G network.
  • the device for realizing the function of the network device may be a network device, or a device capable of supporting the network device to realize the function, such as a chip system, and the device may be installed in the network device.
  • the technical solution provided by the embodiment of the present application the technical solution provided by the embodiment of the present application is described by taking the network device as an example for realizing the function of the network device.
  • Configuration and pre-configuration In this application, both configuration and pre-configuration will be used.
  • the configuration means that the base station/server sends configuration information or values of some parameters to the terminal through messages or signaling, so that the terminal can determine communication parameters or resources during transmission according to these values or information.
  • Pre-configuration is similar to configuration. It can be the parameter information or parameter value negotiated by the base station/server and the terminal device in advance, or it can be the parameter information or parameter value adopted by the base station/server or terminal device specified in the standard protocol, or it can be a pre-stored Parameter information or parameter values at the base station/server or terminal equipment. This application does not limit this.
  • This application can be applied to a long term evolution (long term evolution, LTE) system, a new radio (new radio, NR) system, or other communication systems, wherein the communication system includes network equipment and terminal equipment, and the network equipment is used as a configuration
  • the information sending entity and the terminal device as the configuration information receiving entity.
  • there is an entity in the communication system that sends configuration information to another entity, and sends data to another entity, or receives data sent by another entity; another entity receives configuration information, and sends configuration information to the configuration information according to the configuration information.
  • the entity sends data, or receives data sent by the configuration information sending entity.
  • FIG. 1 is a schematic diagram of a communication system in this application.
  • one network device and six terminal devices are exemplarily shown, and the six terminal devices are terminal device 1, terminal device 2, terminal device 3, terminal device 4, terminal device 5, and terminal device 6, etc.
  • terminal device 1 is a smart teacup
  • terminal device 2 is a smart air conditioner
  • terminal device 3 is a smart fuel dispenser
  • terminal device 4 is a vehicle
  • terminal device 5 is a mobile phone
  • terminal device 6 is a The printer is given as an example.
  • the configuration information sending entity can be a network device, wherein, the network device takes a base station (Base Station) and each terminal device as an example for illustration, and the configuration information receiving entity can be UE1-UE6.
  • the base station It forms a communication system with UE1-UE6.
  • UE1-UE6 can send uplink data to network equipment, and the network equipment needs to receive the uplink data sent by UE1-UE6.
  • the network device can send configuration information to UE1-UE6.
  • UE4-UE6 can also form a communication system.
  • the configuration information sending entity and the receiving entity can both be UEs, wherein UE5 is used as a network device, that is, the configuration information sending entity; UE4 and UE6 are used as terminals
  • a device is an entity receiving configuration information.
  • UE5 sends configuration information to UE4 and UE6 respectively, and receives uplink data sent by UE4 and UE6; correspondingly, UE4 and UE6 receive configuration information sent by UE5, and send uplink data to UE5.
  • the 5G network provides users with customized network services through network slicing, flexible allocation of network resources, and on-demand networking.
  • multiple logical subnets with different characteristics and isolated from each other can be virtualized on the same set of physical infrastructure to provide targeted services to users.
  • services provided by different logical subnets may include enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (ultra reliable and low-latency communication, URLLC), massive machine-type communication (massive machine-type communications, mMTC), etc.
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable and low-latency communication
  • massive machine-type communication massive machine-type communication
  • mMTC massive machine-type communications
  • S-NSSAI single network slice selection assistance information
  • Slice/service type (slice/service type, SST), pointing to slice-specific features and business types.
  • Slice differentiator (slice differentiator, SD), as a supplement to the slice/service type, can further distinguish multiple network slice instances satisfying the same slice/service type, which is optional.
  • NSSAI NSSAI
  • Subscribed NSSAI Subscribed NSSAI
  • Subscribed NSSAI subscription data belonging to the user.
  • Default NSSAI (Default NSSAI): According to the operator's policy, one or more of the user's subscribed NSSAI may be set as the default NSSAI; if the UE does not carry the allowed NSSAI in the registration request message (Registration Request) (Allowed NSSAI), then (if the default NSSAI exists) the network device will use the default NSSAI to provide services to the UE.
  • Requested NSSAI Indicates the configured NSSAI (Configured NSSAI) or Allowed NSSAI carried by the UE in the Registration Request message (Registration Request).
  • Allowed NSSAI Indicates which NSSAI among the NSSAI requested by the UE is allowed by the network device, and the network device will register and receive the message (Registration Accept) in the "Allowed NSSAI" information element (information element, IE) message Yuan is brought to the UE.
  • Rejected NSSAI Indicates which NSSAI among the NSSAI requested by the UE is rejected by the network device, and the network device will bring the "Rejected NSSAI" IE of the Registration Accept message to the UE.
  • Configured NSSAI Indicates the NSSAI configured by the network device for the UE to use. After receiving this configuration parameter, the UE will know which NSSAI is available under the network device; the network device will register to receive the message (Registration Accept) " Configured NSSAI”IE is brought to the UE. If the configuration of the UE changes after registration, the network device can notify the UE of the update through the configuration update command (Configuration update command); the UE will save the configuration of each network device in the non-volatile storage space.
  • the Configured NSSAI Generally, each PLMN can only configure at most one Configured NSSAI.
  • Cell reselection refers to the process in which the UE selects the best cell to provide service signals by monitoring the signal quality of neighboring cells and the current cell in IDLE or INACTIVE state. Cell reselection is basically divided into the following three processes:
  • SIB1 system information block 1
  • two parameters need to be considered during neighbor cell measurement—cell reselection priority and signal quality of the cell currently camped on.
  • the process of neighbor cell measurement can be briefly described as: if the priority is higher than the current cell, the UE will start measurement unconditionally no matter how good the quality of its current cell is; if the priority is less than or equal to the current cell, the UE will measure the cell it is currently camping on The signal quality of the signal is compared with the quality standard issued by the network equipment. If it is better than this standard, the adjacent cell will not be measured. If it is worse than this standard, the adjacent cell will be measured. After the cell reselection measurement, start to judge the quality of the cell and perform cell reselection.
  • the relevant basis includes the signal quality of the serving cell, the signal quality of the neighboring cell, the reselection threshold issued by the network equipment, and the access parameters of the cell (whether the cell is barred, reserved (reserved), access level, etc.).
  • the cell frequency point used by the terminal device in the process of cell reselection may be configured based on the granularity of the network slice (or network slice group). In this case, the terminal device How to perform cell reselection is a technical problem to be solved urgently.
  • the present application provides a cell reselection method and communication device, which are used in the network slicing scenario, and the cell frequency point used by the terminal device in the cell reselection process is based on the granularity of the network slice group
  • the terminal device performs cell reselection based on the cell frequency associated with the target network slice group determined by the priority information, so that the terminal device performs cell reselection with the network slice group as the granularity of cell reselection select. Therefore, while the cell reselection solution is adapted to the scenario of communication based on network slice groups, it can also improve the success rate of cell reselection and communication efficiency.
  • FIG. 2 is a schematic diagram of a cell reselection method provided in this application, and the method includes the following steps.
  • the terminal device determines priority information of a target network slice group.
  • the terminal device determines the priority information of the target network slice group in step S201, where the priority information is used to indicate the priority of the target network slice group.
  • each network slice group of the target network slice group includes one or more network slices.
  • the terminal device performs cell reselection based on the frequency point of the cell associated with the target network slice group determined by the priority information.
  • the process for the terminal device to perform cell reselection based on the cell frequency point associated with the target network slice group determined by the priority information may include: the terminal device is in an idle (IDLE) state or inactive In the (INACTIVE) state, cell reselection is performed based on the cell frequency associated with the target network slice group determined by the priority information.
  • the terminal device may perform cell reselection based on the granularity of the network slicing.
  • the cell frequency point used by the terminal device in the process of cell reselection is configured based on the granularity of network slices, after the terminal device determines a specific network slice (including one or more network slices), based on the The cell frequency point associated with a specific network slice performs cell reselection.
  • the terminal device performs cell reselection based on the granularity of network slicing, which may include the following process:
  • the RAN can broadcast the cell reselection priority for the slice, and in different scenarios, one or more network slices that the terminal device expects to be able to access can be called the target network slice (Intended Slice) (or other names, not here limited).
  • the target network slice is the network slice-related information received by the access stratum (AS) of the terminal device from the non-access stratum (NAS) under different circumstances.
  • AS access stratum
  • NAS non-access stratum
  • the target network slice can be an allowed NSSAI/requested NSSAI.
  • the terminal device can apply for a new NSSAI, that is, the target network slice can be Requested NSSAI (the indicated network slice).
  • the target network slice may be an allowed NSSAI (indicated network slice).
  • the target network slice may be a suspended NSSAI (indicated network slice), that is, a protocol data unit (protocol data unit) that has suspended the context of the terminal device in the inactive state but has been activated. , PDU) session's associated NSSAI (indicated network slice).
  • NSSAI indicator network slice
  • PDU protocol data unit
  • the target network slice is the NSSAI (indicated network slice) related to the mobile originated (MO) service.
  • the terminal device may perform cell reselection based on the granularity of the network slicing group.
  • the terminal device may perform cell reselection based on the granularity of the network slicing group.
  • the terminal device determines a specific network slice group (including one or more network slice groups) , performing cell reselection at the cell frequency point associated with the specific network slice group.
  • the concept of network slice group (Slice Group) is further proposed, that is, one or more network slices are grouped and identified according to certain rules.
  • the network device uses the cell reselection information (such as cell frequency point information) associated with the network slice group as a piece of information sent to the terminal device, and sends the network As another piece of information sent to the terminal device, the slice information of the slice is sent separately, while improving the security of information transmission and reducing the broadcast overhead.
  • cell reselection information such as cell frequency point information
  • the grouping rules may include the following implementation methods:
  • Option 3 other network slicing grouping mechanisms different from Option 1 and Option 2.
  • NSSAI Network Slice Group ID
  • a specific network slice group ID (Slice Group ID) in a specific area
  • the same network slice group ID includes the same NSSAI in a specific area.
  • Two-way correspondence For example, there may be a related NSSAI corresponding to the network slice group identifier, and there may also be a network slice group identifier corresponding to the NSSAI.
  • the core network element (core network, CN) to the terminal device via the NAS, it can be based on a specific terminal device (such as an SST carried by an allowed NSSAI/configured NSSAI/subscribed NSSAI) or a non-specific terminal device ( For example, according to the actual network deployment).
  • a specific terminal device such as an SST carried by an allowed NSSAI/configured NSSAI/subscribed NSSAI
  • a non-specific terminal device For example, according to the actual network deployment.
  • FIG. 3a An implementation example is shown in Fig. 3a, in Fig. 3a, the SST packets carried in allowed NSSAI/configured NSSAI/subscribed NSSAI are illustrated, such as eMBB type and URLLC type. Among them, Cell 1 (Cell 1) and Cell 2 (Cell 2) are located at Geographical Location 1 (Geographical Location 1), and Cell 3 (Cell 3) and Cell 4 (Cell 4) are located at Geographical Location 2 (Geographical Location 2).
  • NSSAI/configured NSSAI/subscribed NSSAI are illustrated, such as eMBB type and URLLC type.
  • Cell 1 and Cell 2 (Cell 2) are located at Geographical Location 1 (Geographical Location 1)
  • Cell 3 (Cell 3) and Cell 4 (Cell 4) are located at Geographical Location 2 (Geographical Location 2).
  • the supported access frequency is recorded as frequency 2 (Frequency 2, F2)
  • the supported network slices include network slice 1 and network slice 2 (Slice 1+Slice 2).
  • the supported access frequency is recorded as frequency 1 (Frequency 1, F1), and the supported network slice includes network slice 1 (Slice 1).
  • the supported access frequency point is recorded as F2
  • the supported network slice includes Slice 1.
  • the supported access frequency point is recorded as F1
  • the supported network slice includes Slice 1.
  • Slice Group#1 ⁇ Slice 1_eMBB type services ⁇ .
  • Slice Group#2 ⁇ Slice 2_URLLC type services ⁇ .
  • FIG. 3b An implementation example is shown in FIG. 3b, and the example in FIG. 3b is a simple grouping correspondence based on the actual deployment of network slices in the current network.
  • Cell 0 is located in tracking area 0 (tracking area 0, TA0)
  • Cell 1 is located in tracking area 1 (tracking area 1, TA1)
  • Cell 2 is located in tracking area 2 (tracking area 2, TA2)
  • Cell 3 is located in tracking area 3 (tracking area 3, TA3).
  • the supported access frequency point is recorded as frequency point 0 (Frequency 0, F0), and the supported network slices include network slice 1, network slice 2, network slice 3, and network slice 4 (Slice 1, 2, 3, 4).
  • the supported access frequency point is recorded as F1
  • the supported network slices include network slice 1 and network slice 3 (Slice 1, 3).
  • the supported access frequency point is recorded as F2
  • the supported network slices include network slice 1 and network slice 2 (Slice 1, 2).
  • the supported access frequency is recorded as frequency 3 (Frequency 3, F3)
  • the supported network slices include network slice 2, network slice 3, and network slice 4 (Slice 2, 3, 4).
  • Slice Group#1 ⁇ Slice 1, Slice 3 ⁇ .
  • Slice Group#2 ⁇ Slice 1, Slice 2 ⁇ .
  • Slice Group#3 ⁇ Slice 2, Slice 3, Slice 4 ⁇ .
  • Slice Group#4 ⁇ Slice 1, Slice 2, Slice 3, Slice 4 ⁇ ;
  • the granularity of area validity corresponding to the corresponding relationship between the network slice group and the network slice can be TA/RA or PLMN area.
  • the TA/RA granularity is a dynamic correspondence, which is determined by a tracking area update (TAU).
  • TAU tracking area update
  • the PLMN granularity is a static correspondence, which is determined by the subscription information between the terminal device and the operator.
  • the current mainstream choice is to support the introduction of a network slicing grouping mechanism (i.e., scheme 3) different from schemes 1 and 2 to avoid the above problems.
  • scheme 3 a network slicing grouping mechanism
  • the SST-based grouping method may not be able to distinguish network slices with different SDs, and the UAC AC-based grouping method may cause terminal devices and Misalignment between access network equipment.
  • the terminal device can realize that the terminal device can perform cell reselection based on the granularity of the network slice group.
  • step S201 of the implementation process shown in FIG. 2 the terminal device determines the target network slice group
  • the priority information is used to indicate the priority of the target network slice group.
  • each network slice group of the target network slice group includes one or more network slices.
  • step S202 of the implementation process shown in FIG. 2 the terminal device performs cell reselection based on the cell frequency point associated with the target network slice group determined by the priority information.
  • the number of network slice groups included in the target network slice group is 1.
  • the terminal device may not perform the process of "determining the priority information of the target network slice group" in step S201, but directly execute In step S202, "perform cell reselection based on the frequency point of the cell associated with the target network slice group".
  • the terminal device determines the cell frequency point associated with the target network slice group, and thereafter, the terminal device determines the cell frequency point associated with the target network slice group. Click to perform cell reselection.
  • the terminal device performs cell reselection based on the frequency point of the cell associated with the target network slice group.
  • the terminal device performs cell reselection based on the frequency point of the cell associated with the target network slice group.
  • the terminal device in the scenario of network slicing, when the cell frequency point used by the terminal device in the process of cell reselection is configured based on the granularity of the network slice group, the terminal device based on the cell frequency point associated with the target network slice group
  • the cell reselection solution enables the terminal device to perform cell reselection with the network slice group as the granularity of cell reselection. Therefore, while the cell reselection solution is adapted to the scenario of communication based on network slice groups, it can also improve the success rate of cell reselection and communication efficiency.
  • the number of cell frequency points associated with each network slice group may be one or more.
  • the terminal device can perform frequency point (reselection) on multiple cell frequency points based on the frequency point (reselection) priority configured (or pre-configured) by the network device. District re-election.
  • the terminal device may determine the cell frequency point associated with each network slice group in the target network slice group based on the broadcast message of the network device.
  • the terminal device may determine the cell frequency point associated with each network slice group in the target network slice group based on a unicast message (for example, an RRC release message) of the network device.
  • a unicast message for example, an RRC release message
  • the terminal device performs cell reselection based on the cell frequency associated with the target network slice group determined by the priority information in step S202, including: the terminal device performs cell reselection based on the frequency point of the target cell Perform cell reselection, wherein the target cell frequency point is one or more cell frequency points associated with the network slice group with the highest priority among the target network slice groups indicated by the priority information.
  • the terminal device may select the network slice group with the highest priority
  • One or more associated cell frequency points perform cell reselection, so as to improve the success rate of cell reselection performed by the terminal device.
  • the terminal device performs cell reselection based on one or more cell frequency points associated with the network slice group with the second highest priority (or other priority) in the target network slice group.
  • the terminal device performing cell reselection based on the target cell frequency includes: the terminal device performing cell reselection based on a frequency point priority corresponding to the target cell frequency point.
  • the number of cell frequency points included in the target cell frequency point can be one or more, and the terminal device can determine the target cell frequency point based on the frequency point (reselection) priority configured (or pre-configured) by the network device , so that the terminal device performs cell reselection based on the frequency point priority corresponding to the frequency point of the target cell in step S202.
  • the terminal device may determine one or more cell frequency points associated with the network slice group with the highest priority in the target network slice group based on the broadcast message of the network device, that is, the frequency point of the target cell; or, the terminal device One or more cell frequencies associated with the network slice group with the highest priority in the target network slice group may be determined based on a unicast message (for example, an RRC release message) of the network device, that is, the target cell frequency point.
  • a unicast message for example, an RRC release message
  • the method further includes: the terminal device receiving indication information from the network device, where the indication information is used to indicate that after the cell reselection based on the target cell frequency fails, the first cell frequency Cell reselection is performed on the frequency point priority corresponding to the point; wherein, the frequency point of the first cell includes at least one of the following:
  • the cell frequencies associated with one or more network slices included in the network slice set, the network slice set including the network slice that the terminal device expects to access; or, the cell frequency points not associated with the network slice; or, the network slice The frequency points of cells associated with one or more network slice groups included in the group set, the network slice group set including the network slice group corresponding to the network slice that the terminal device expects to access; or, cells not associated with the network slice group frequency point; or, one or more cell frequency points associated with network slice groups other than the network slice group with the highest priority in the target network slice group indicated by the priority information.
  • the first cell frequency does not include one or more cell frequencies associated with network slice groups other than the network slice group with the highest priority in the target network slice group indicated by the priority information.
  • the terminal device performing cell reselection based on the frequency point of the target cell in step S202 includes: the terminal device determines to perform cell reselection based on the frequency point of the target cell After the selection fails, the terminal device performs cell reselection based on the second cell frequency; after the terminal device determines that the cell reselection based on the second cell frequency fails, the terminal device performs cell reselection based on the first cell frequency .
  • the terminal device can also receive the indication information, so that the terminal equipment can clearly perform cell reselection based on the frequency point of the target cell based on the indication information during the process of performing cell reselection based on the frequency point of the target cell in step S202.
  • the terminal device may perform cell reselection based on the frequency point priority corresponding to the frequency point of the first cell.
  • the terminal device fails to perform cell reselection based on the frequency point of the target cell, it can further perform cell reselection based on the indication information, so as to further improve the success rate of performing cell reselection by the terminal device.
  • the network slice set may include other network slices besides the network slice that the terminal device expects to access, which is not limited here.
  • the network slices included in the network slice set may include Configured S-NSSAI and/or Allowed S-NSSAI, where the number of Configured S-NSSAI or Allowed S-NSSAI may be one or more.
  • the network slice identifier (such as network slice index, network slice name, etc.) contained in the network slice set can be implemented in the form of a list, which can be called a slice list (Slice List), or implemented in other forms, such as Mathematical relational expressions, bitmaps, etc. or other forms are not limited here.
  • the network slice group set may also include other network slice groups, which is not limited here.
  • the network slice contained in any network slice group in the set of network slice groups may include Configured S-NSSAI and/or Allowed S-NSSAI, where the number of Configured S-NSSAI or Allowed S-NSSAI may be one or more.
  • the network slice group identification (such as network slice group index, network slice group name, etc.) contained in the network slice group set can be implemented in the form of a list, and the list can be called a slice group list (Slice Group List), or It is implemented in other forms, such as mathematical relational expressions, bitmaps, etc., or other forms, which are not limited here.
  • the frequency point of the first cell may include the above multiple implementations.
  • k is used as an example to describe the number of frequency points of the first cell including the above "at least one item", where k is greater than or equal to 1.
  • the implementation of the indication information will be further described below based on different values of k.
  • the frequency point of the first cell may include one of the five items in the foregoing "at least one item".
  • the frequency point of the first cell may include at least two of the five items in the above "at least one item", and the at least two items
  • the execution sequence may not be limited.
  • the frequency point of the first cell may include at least two of the five items in the above "at least one item”, and the terminal device may configure Or determine the execution sequence of the at least two items in a pre-configured manner.
  • the terminal device may determine the execution order of the at least two items through configuration or pre-configuration. Sorting can be expressed as:
  • One or more cell frequency points associated with network slice groups other than the network slice group with the highest priority in the target network slice group indicated by the priority information > one or more cell frequency points contained in the network slice group set Cell frequencies associated with a network slice group > cell frequencies associated with one or more network slices contained in the network slice set > cell frequencies not associated with a network slice group cell frequencies not associated with a network slice .
  • the terminal device may determine the execution order of the at least two items through configuration or preconfiguration. There may also be other implementation manners, which are not limited here.
  • the indication information is an information element with a variable value; in other words, the information element with a variable value indicates whether to correspond to the first cell frequency after the cell reselection based on the frequency point of the target cell fails. cell reselection according to the frequency point priority.
  • the indication information when the value of the indication information is the first value, the indication information is used to indicate that after failing to perform cell reselection based on the frequency of the target cell, the frequency priority corresponding to the frequency of the first cell should be reselected. Reselection; when the value of the indication information is the second value, the indication information is used to indicate that after the failure of cell reselection based on the frequency point of the target cell, there is no need to perform cell reselection based on the frequency point priority corresponding to the frequency point of the first cell. Reselection; wherein, the first value is different from the second value.
  • the implementation process of the first value and the second value will be further described below with reference to more implementation examples.
  • the frequency point of the first cell may include one of the five items in the above "at least one item”.
  • the value corresponding to the indication information may include a Boolean value, that is, the Boolean value indicates whether to perform cell reselection based on a frequency point priority corresponding to one of the five frequency points.
  • the first value is "true” and the second value is "false”.
  • the value corresponding to the indication information may include a bit value, that is, the bit value indicates whether to perform cell reselection based on a frequency point priority corresponding to one of the five frequency points. For example, when the number of bits occupied by the indication information is "1", the first value is "1" and the second value is "0"; or, the first value is "0" and the second The value is "1".
  • the frequency point of the first cell may include at least two of the five items in the above "at least one item”.
  • the value corresponding to the indication information may include a Boolean value, that is, a Boolean value indicates whether to perform cell reselection based on the frequency point priorities corresponding to the at least two cell frequency points.
  • the value corresponding to the indication information may include a bit value, that is, a bit value indicates whether to perform cell reselection based on the frequency point priorities corresponding to the at least two cell frequency points.
  • the value corresponding to the indication information may include at least two Boolean values, that is, the at least two Boolean values respectively indicate whether to perform cell reselection based on the frequency point priorities corresponding to the at least two cell frequency points.
  • the value corresponding to the indication information may include at least two bit values, that is, the at least two bit values respectively indicate whether to perform cell reselection based on the frequency point priorities corresponding to the at least two cell frequency points.
  • the indication information is an optional information element; in other words, by taking the value of the optional information element, it indicates whether to use the frequency corresponding to the first cell frequency after cell reselection based on the frequency point of the target cell fails. Point priority for cell reselection.
  • the message sent by the network device includes the indication information
  • the message sent by the network device may include a broadcast message, an RRC message, a MAC CE message, or a DCI message, etc., or other messages, which are not limited here.
  • the indication information includes at least one of the following: the number of cell reselections based on the first cell frequency, the duration of cell reselection based on the first cell frequency, The start time of cell reselection based on the first cell frequency or the end time of cell reselection based on the first cell frequency.
  • the number of items included in "at least one item" hereafter is denoted as P, and P is greater than or equal to 1.
  • the indication information received by the terminal device may include at least one cell reselection mode in the above "P items", so that the terminal device fails to perform cell reselection based on the frequency point of the target cell, A reselection manner for performing cell reselection based on the frequency point of the first cell may be further specified based on the indication information based on the indication information, so as to further improve the success rate of the terminal device performing cell reselection.
  • the frequency point of the first cell may include one of the five items in the above "at least one item”.
  • the indication information may use at least one item in the P item to indicate a reselection manner for cell reselection based on a frequency point priority corresponding to a frequency point in the five items.
  • the frequency point of the first cell may include at least two of the five items in the above "at least one item”.
  • the indication information may include a piece of "at least one of P items" information, which is used to indicate based on the at least two pieces of cell frequency points corresponding to the "at least one of P items” information.
  • the indication information may include at least two pieces of "at least one of P items" information, which are used to respectively indicate that based on the at least two pieces of cell frequency The reselection mode of cell reselection according to the frequency point priority corresponding to the point.
  • the terminal device determines the priority information used to indicate the target network slice group
  • the terminal device performs cell reselection, the target determined by the terminal device based on the priority information
  • the cell frequency point associated with the network slice group performs cell reselection.
  • the terminal device performs cell reselection on the frequency point of the cell associated with the target network slice group determined based on the priority of the target network slice group.
  • the target network slice determined by the terminal device based on the priority information
  • the scheme of performing cell reselection on the frequency points of the cells associated with the group enables terminal devices to perform cell reselection at the granularity of cell reselection based on the network slice group. Therefore, while the cell reselection scheme is adapted to the scenario of communicating based on network slice groups, it can also improve the success rate of cell reselection and communication efficiency.
  • the network device uses the cell reselection information associated with the network slice group (such as the cell frequency point Information) as one piece of information sent to the terminal device, and the slice information of the network slice contained in the network slice group as another piece of information sent to the terminal device, by sending separately (compared to the information sent by the same broadcast message method) can reduce the broadcast overhead while improving the security of information transmission.
  • the cell reselection information associated with the network slice group such as the cell frequency point Information
  • the target network slice group includes the network slice that the terminal device expects to access.
  • the target network slice group includes the network slice that the terminal device expects to access, in other words, the terminal device determines the target network slice group based on the network slice that the terminal device expects to access.
  • the terminal device may determine the target network slice group in advance based on one or more network slices that the terminal device expects to access. In other words, the target network slice group determined by the terminal device is the network slice group that the terminal device expects to access.
  • the terminal device can communicate in the target cell to obtain the network slice corresponding to the network slice that the terminal device expects to access.
  • a (business-related) web service A (business-related) web service.
  • the network slice that the terminal device expects to access includes at least one of the following: the network slice indicated by the allowed (Allowed) single network slice selection assistance information (single network slice selection assistance information, NSSAI) information element, the requested NSSAI The network slice indicated by the (Requested NSSAI) information element, the network slice indicated by the suspended NSSAI (suspended NSSAI) information element, or the network slice related to the mobile originated traffic (MO traffic) service.
  • the terminal device can determine the network slice that the terminal device expects to access based on the network slice indicated by the above-mentioned multiple ways (referred to as the first network slice, which can also be called the target network slice (Intended Slice)) in different scenarios.
  • Network slicing the network slice indicated by the allowed (Allowed) single network slice selection assistance information, NSSAI) information element, the requested NSSAI The network slice indicated by the (Requested NSSAI) information element, the network slice indicated by the suspended NSSAI (suspended NSSAI) information element, or the
  • the terminal device may determine one or more network slices indicated by the allowed NSSAI as the network slice that the terminal device expects to access; For a terminal device in the (Inactive) state, the terminal device may determine one or more network slices indicated by the suspended NSSAI as the network slice that the terminal device expects to access. Therefore, multiple implementations are provided to realize communication in different scenarios.
  • the process for the terminal device to determine the first network slice can refer to the terminal in the aforementioned "terminal device performs cell reselection based on the granularity of network slices".
  • the device determines the implementation process of the target network slice, which will not be described here.
  • the target network slice group is (at least) determined by the corresponding relationship between network slices and network slice groups, and the relationship between network slices and network slice groups
  • the corresponding relationship between (for the convenience of hereinafter referred to as the first corresponding relationship) when the first area where the terminal device is currently located is invalid (or not applicable, not suitable, etc.)
  • the target network slice group includes the default network slice , wherein the first correspondence is the correspondence between network slices and network slice groups, and the first area includes a registration area (registration area, RA), a tracking area (tracking area, TA) or a public land mobile network (public land mobile network) network, PLMN) area.
  • the terminal device may be in the first corresponding relationship in the current location of the terminal device
  • the terminal device determines the default network slice group as the target network slice group.
  • the terminal device determines that the target network slice group includes the default network slice. So that the terminal device performs cell reselection based on the cell frequency associated with the default network slice group provided by the network device in the first area, so as to avoid cell reselection failure.
  • the default network slice group includes one or more default network slices.
  • the terminal device may determine that the target network slice group includes a default network slice group when the first correspondence is invalid in the first area where the terminal device is located.
  • the network slices included in the default network slice group may specifically be one or more default network slices (Default Slice) (defined by the operator).
  • the first correspondence may be a correspondence between the network slice and the network slice group that the terminal device received an instruction from the network device last time.
  • the corresponding relationship between the network slice and the network slice group indicated by the network device may be carried in a NAS message (or called a unicast message).
  • the first correspondence is associated with a second area, where the second area may include an RA, TA, or PLMN area.
  • the second area may include an RA, TA, or PLMN area.
  • different (RA, TA or PLMN) regions may be associated with different correspondences.
  • the corresponding relationship between network slices and network slice groups may be different.
  • the determining the target network slice group by the first correspondence may also include: the terminal device determines the target network slice group by the first correspondence.
  • the terminal device receives a system message, and the system message may include information indicating the first area where the terminal device is currently located.
  • the terminal device determines that the first correspondence is valid; when the first area indicated by the system message is associated with the first correspondence When the second areas are different, the terminal device determines that the first correspondence is invalid.
  • the terminal device can directly determine the target cell including multiple target network slices based on the target network slice group, so that the terminal device can be more Quickly obtain more types of network services in target cells that support multiple target network slice communications to improve user experience.
  • the terminal device may determine the priority information of the target network slice group based on various implementation manners. For example, the terminal device may determine the priority information based on an indication of the network device; as another example, the terminal device determines the priority information based on historical slice information recorded locally. The following will describe respectively in combination with specific implementation examples.
  • the process for the terminal device to determine the priority information of the target network slice group may specifically include: the terminal device receives the priority information from the network device. In other words, the terminal device determines the priority information based on the indication of the network device.
  • the priority information and the above "indication information for indicating that cell reselection based on the frequency point priority corresponding to the first cell frequency point after the failure of cell reselection based on the target cell frequency point" may be carried in the same message.
  • the priority information is carried in first indication information, and the first indication information is at least used to indicate the priority information.
  • the first indication information is also used to indicate priorities of network slice groups other than the target network slice group.
  • the implementation process of the cell reselection method shown in FIG. 2 may be expressed as the implementation process shown in FIG. 4 .
  • the realization process of step S201 shown in FIG. 2 is realized by "step S401, the terminal device receives the first indication information from the network device", and the realization process of step S402 may refer to the realization process of step S202 shown in FIG. 2 .
  • the terminal device receives first indication information from the network device in step S401, and correspondingly, the network device sends the first indication information to the terminal device in step S401.
  • the terminal device may determine the priority information of the target network slice group based on the first indication information sent by the network device, where the first indication information is at least used to indicate the priority information.
  • the terminal device can specify the network slice group configured by the network device based on the indication of the network device (for example, the first indication information), so as to improve the success rate of subsequent cell reselection in step S402.
  • the network device may specifically be an access network device.
  • the implementation process can be implemented through the process shown in FIG. 5 .
  • the method for cell reselection shown in Figure 5 includes the following processes:
  • the core network device sends the first indication information to the access network device.
  • the access network device sends the first indication information to the terminal device.
  • the terminal device performs cell reselection based on the cell frequency point associated with the target network slice group determined by the priority information (indicated by the first indication information).
  • step S502 shown in FIG. 5 may refer to the implementation process of step S402 described above, and step S401 shown in FIG. 4 is realized through steps S501 a and S501 b shown in FIG. 5 .
  • the access network device may receive in step S501a the NAS message carrying the first indication information sent by the core network device, and in step S501b, the access network device will The NAS message carrying the first indication information is forwarded to the terminal device, so that the terminal device receives the first indication information.
  • the priority information is determined by the quantity and/or priority information of network slices included in each network slice group in the target network slice group.
  • the process for the terminal device to determine the priority information of the target network slice group specifically includes: the terminal device determines the priority information based on first information, wherein the first information is used to indicate Quantity and/or priority information of network slices included in each network slice group in the target network slice group.
  • the implementation process of the cell reselection method shown in FIG. 2 may be expressed as the implementation process shown in FIG. 6 .
  • the implementation process of step S201 shown in Figure 2 is through "step S601 the core network device sends the first information to the access network device", “step S601b the access network device sends the first information to the terminal device.” and "step S602 the terminal The device determines the priority information based on the first information, and the implementation process of step S603 may refer to the implementation process of step S202 shown in FIG. 2 .
  • the access network device may receive a NAS message carrying the first information sent by the core network device in step S601a, and in step S601b, the access network device will The NAS message carrying the first information is forwarded to the terminal device, so that the terminal device receives the first information. Thereafter, the terminal device may determine the priority information of the target network slice group based on the information of the network slices included in the target network slice group indicated by the first information in step S602. In other words, in step S602, the terminal device determines the priority information based on the network slice information (such as priority information, quantity information, etc.) included in the target network slice group.
  • the network slice information such as priority information, quantity information, etc.
  • the first information is determined based on the instruction of the network device in step S601b, so that the terminal device can specify the network slices included in the network slice group configured by the network device based on the instruction of the network device (that is, the first information) information to increase the success rate of performing cell reselection in step S603 (ie, step S202 shown in FIG. 2 ).
  • the first information includes at least one of the following:
  • the priority information of the network slices contained in each network slice group In the target network slice group, the priority information of the network slices contained in each network slice group; or,
  • the priority value of the network slice contained in each network slice group is the priority value of the network slice contained in each network slice group.
  • the number of network slices contained in each network slice group is the number of network slices contained in each network slice group.
  • the priority information of the target network slice contained in each network slice group In the target network slice group, the priority information of the target network slice contained in each network slice group; or,
  • the priority value of the target network slice contained in each network slice group is the priority value of the target network slice contained in each network slice group.
  • the number of target network slices contained in each network slice group is the number of target network slices contained in each network slice group.
  • the first information may be a combination of one or more pieces of information above. While improving the implementation flexibility of the terminal device, it may be obtained from multiple dimensions (such as the dimension of priority information, the dimension of quantity information, etc.) Information provides the basis for determining priority information.
  • the first information includes the priority information of the network slices contained in each network slice group in the target network slice group (denoted as the second information)
  • each network slice appears only once in the target network slice group; in other words, in this scenario, the network slices contained in different network slice groups in the target network slice group are different (or the target network slice group The network slices contained in different network slice groups do not have the same network slice).
  • the implementation process shown in FIG. 2 may also be implemented through the implementation process shown in FIG. 7 .
  • the implementation process shown in Fig. 7 includes the following steps.
  • the core network device sends the second information to the access network device.
  • the access network device sends the second information to the terminal device.
  • the terminal device performs cell reselection based on the frequency point of the cell associated with the target network slice group determined by the second information.
  • the difference from the implementation process of the method for cell reselection shown in FIG. 2 is that, in the implementation shown in FIG. 7, after the terminal device receives the second information in step S701b, the terminal device can In the method, the network slice group corresponding to the network slice with the highest priority is determined based on the priority of the network slice indicated by the second information, and cell reselection is performed based on the frequency point associated with the network slice group.
  • the priority of the network slice can be different. Equivalent to the priority of the network slice group to which the network slice belongs.
  • step S702 the terminal device can perform the network slice at the frequency point of the cell associated with the target network slice group based on the priority of the network slice indicated by the second information (equivalent to the priority of the target network slice group).
  • Cell reselection provides a solution to the special scenario shown in Figure 7 .
  • step S201 shown in FIG. 2 the process for the terminal device to determine the priority information of the target network slice group specifically includes: the terminal device determines the priority information based on historically used (or called historically accessed) network slice information. level information.
  • the terminal device may determine the priority information of the target network slice group based on the network slice information historically used by the terminal device.
  • the terminal device since the historically used network slicing information can reflect the specific information of the terminal device (such as service preference information, duration, etc.) to a certain extent, the terminal device makes the The priority information determined by the network slicing information performs cell reselection, and the determined target cell can provide the network service corresponding to the specific information of the terminal device, so as to improve user experience.
  • Cell 1 is a camping cell (Camping Cell) of a terminal device (denoted as UE), and Cell 2, Cell 3, and small Cell 4 are candidate cells of the UE.
  • UE camping Cell
  • Cell 2 Cell 3
  • small Cell 4 are candidate cells of the UE.
  • the supported access frequency point is recorded as F1
  • the supported network slices include network slice 1, network slice 3, and network slice 4 (Slice 1, 3, 4).
  • the supported access frequency point is recorded as F2
  • the supported network slices include network slice 2, network slice 3, network slice 4, and network slice 5 (Slice 2, 3, 4, 5).
  • the supported access frequency point is recorded as F3
  • the supported network slices include network slice 1, network slice 2, and network slice 5 (Slice 1, 2, 5).
  • the supported access frequency point is recorded as F4, and the supported network slices include network slice 3 and network slice 4 (Slice 3, 4).
  • the corresponding relationship between different network slice groups and multiple network slices may include:
  • the above four cells are in the same RA (or TA or PLMN area), in other words, the correspondence between the above groups is valid in the four cells.
  • Network slice 1 network slice 2, network slice 3, network slice 4, and network slice 5 are recorded as: P(S1) ⁇ P(S2) ⁇ P(S3) ⁇ P(S4) ⁇ P(S5).
  • steps 1 and 2 involved in any one of the following implementation examples 1 to 6 are an implementation example of step S201 in the aforementioned embodiment in FIG. 2 .
  • the following implementation examples 1 to 2 Step 3 involved in any of the six implementation examples is recorded as an implementation example of step S202 in the aforementioned embodiment of FIG. 2 .
  • Implementation example 1 it is an implementation example of the aforementioned implementation manner 1.
  • Step 1 The terminal device determines a target network slice group corresponding to (one or more) target network slices.
  • the NAS layer of the terminal device determines that the target network slice is S3, and the terminal device determines that the corresponding relationship between the target network slice group and the associated NSSAI is valid in the current RA (or TA or PLMN area), then according to the S-NSSAI of S3 Find the corresponding target network slice group through the corresponding relationship, that is, the terminal device determines the target network slice group as network slice group 1, network slice group 2 and network slice group 4 (denoted as: SG1, SG2, SG4).
  • Step 2 the terminal device determines the priority information of the target network slice group according to the NAS message (from the CN).
  • the terminal device may perform screening in step 2 based on the number of target network slices contained in each network slice group in the target network slice group.
  • the terminal device since the number of target network slices (that is, S3) contained in SG1, SG2 and SG4 is 1, the terminal device determines that the target network slice group does not need to be screened and some network slice groups are excluded.
  • the process for the terminal device to determine that the target network slice group includes network slice group 1, network slice group 2, and network slice group 4 may include the following two implementations:
  • the target network slice groups are network slice group 1, network slice group 2, and network slice group 4.
  • the priority of the target network slice group can be directly sent from the CN to the NAS message of the terminal device through the NAS layer obtained from .
  • the priority form can be a specific assignment of the priority corresponding to each target network slice group, or it can be a list of target network slice group IDs sorted according to certain rules.
  • the process for the terminal device to determine the priority information of the target network slice group according to the NAS message may include the following two implementations:
  • Mode 1 The NAS layer of the terminal device obtains the priority of the target network slice group according to the priority information of the target network slice group directly provided by the CN.
  • Method 2 The NAS layer of the terminal device forwards the priority information of the target network slice group directly provided by the CN to the AS layer, and then the AS layer obtains the priority of the target network slice group according to the above information.
  • Step 3 the terminal device performs cell reselection according to the priority information of the target network slice group obtained in step 2.
  • step 3 the terminal device performs cell reselection according to the frequency point priority corresponding to the target network slice group with the highest priority.
  • the target network slice group with the highest priority is SG1
  • the cell reselection of the terminal device is performed according to the frequency point (reselection) priority broadcast corresponding to SG1.
  • the second implementation example is an implementation example of the aforementioned second implementation manner.
  • Step 1 The terminal device determines the target network slice group corresponding to the target network slice.
  • the NAS layer of the terminal device determines that the target network slice is S1, and the corresponding relationship between the target network slice group and the associated NSSAI is known to be valid in the current RA, then find the corresponding target network slice group through the corresponding relationship according to the S-NSSAI of S1 , for example, SG1, SG3.
  • Step 2 The terminal device determines priority information of the target network slice group based on the first information.
  • the terminal device determines the priority of the target network slice group according to the first information (including the number of associated network slices in the target network slice group and the priority corresponding to each network slice).
  • the implementation form of the priority information may be a specific assignment of the priority corresponding to each target network slice group, or it may be a list of target network slice groups sorted according to certain rules.
  • each piece of information contained in the above-mentioned first information sequentially participates in the determination process of "determining priority information" includes the following implementations.
  • the terminal device may perform screening based on the number of target network slices contained in each network slice group in the target network slice group, so as to determine the priority information.
  • the terminal device may determine priority information based on the number of network slices contained in each network slice group in the target network slice group. Specifically, the terminal device sets a priority according to the number of network slices associated with the target network slice group, and the more the number of associated network slices, the higher the priority of the corresponding target network slice group. In this embodiment, both SG1 and SG3 are associated with 3 network slices, so further priority needs to be distinguished;
  • the terminal device may determine the priority information based on the priority of the network slices included in each network slice group in the target network slice group. Specifically, the terminal device sets the priority according to the sum of network slice priorities corresponding to the network slices associated with the target network slice group, and the greater the sum of the associated network slice priorities, the higher the priority of the corresponding target network slice group.
  • the method for determining the priority of the target network slice group is similar to the above. If the priority of the network slice is obtained by sorting the priority order of multiple network slices, then for the convenience of further calculating the value of the target network slice group through Sum Priority, you need to assign a value to the priority of the network slice first, and the specific implementation method is not limited.
  • the terminal device may determine the priority information based on the priority information of the network slices included in the target network slice group.
  • the terminal device sets the priority of the network slice group according to the priority corresponding to the network slice with the highest priority associated with each network slice group in the target network slice group, and the associated network slice with the highest priority The higher the corresponding priority, the higher the corresponding target network slice group priority. If the network slices with the highest priority correspond to the same priority, continue to find the network slice with the highest priority among the remaining slices, and so on, until the priority of the target network slice group is distinguished.
  • the priority corresponding to the network slice with the highest priority among the network slices associated with SG1 is P(S4)
  • the priority corresponding to the network slice with the highest priority among the network slices associated with SG3 is P (S5), from P(S4) ⁇ P(S5)
  • P(SG3) P(S5), that is, P(SG1) ⁇ P( SG3)
  • the implementation process of step 2 may include the following two implementation methods:
  • Method 1 The NAS layer of the terminal device obtains the priority of the target network slice group according to the identifier of the target network slice group, the number of associated network slices in the target network slice group, and the priority corresponding to each network slice.
  • Method 2 The NAS layer of the terminal device forwards the target network slice group identifier, the number of network slices associated in the target network slice group, and the priority corresponding to each network slice to the AS layer, and then obtains the target network slice based on the above information at the AS layer The priority of the group.
  • Step 3 the terminal device performs cell reselection according to the priority information obtained in step 2.
  • step 3 the terminal device performs cell reselection according to the frequency point priority corresponding to the target network slice group with the highest priority.
  • the target network slice group with the highest priority is SG3
  • the cell reselection of the terminal device is performed according to the frequency point (reselection) priority broadcast corresponding to SG3.
  • Step 1 The terminal device determines the target network slice group corresponding to the target network slice.
  • the NAS layer of the terminal device determines that the target network slice is S2, and the corresponding relationship between the target network slice group and the associated NSSAI is known to be valid in the current RA, then the corresponding target network slice group is found through the corresponding relationship according to the S-NSSAI of S2 , namely SG2, SG3.
  • Step 2 The terminal device determines priority information of the target network slice group based on the first information.
  • the terminal device determines the priority of the target network slice group according to the first information (including the number of associated network slices in the target network slice group and the priority corresponding to each network slice) in step 2.
  • the implementation form of the priority information may be a specific assignment of the priority corresponding to each target network slice group, or it may be a list of target network slice groups sorted according to certain rules.
  • the implementation process of step 2 may include the following two implementation methods:
  • Method 1 The NAS layer of the terminal device obtains the priority of the target network slice group according to the identifier of the target network slice group, the number of associated network slices in the target network slice group, and the priority corresponding to each network slice.
  • Method 2 The NAS layer of the terminal device forwards the target network slice group identifier, the number of network slices associated in the target network slice group, and the priority corresponding to each network slice to the AS layer, and then obtains the target network slice based on the above information at the AS layer The priority of the group.
  • the terminal device participates in the determination process of "determining priority information" sequentially based on each information contained in the first information in step 2.
  • the corresponding determination process in the case of network slice 1 is not described here.
  • the terminal device may determine the priority information based on the number of network slices included in each network slice group in the target network slice group. Specifically, the terminal device sets a priority according to the number of network slices associated with the target network slice group, and the more network slices associated therewith, the higher the priority of the corresponding target network slice group.
  • SG2 is associated with 4 slices
  • Step 3 the terminal device performs cell reselection according to the priority information obtained in step 2.
  • the terminal device performs cell reselection according to the frequency point priority corresponding to the target network slice group with the highest priority.
  • the target network slice group with the highest priority is SG2
  • the cell reselection of the terminal device is performed according to the frequency point (reselection) priority broadcast corresponding to SG2.
  • the network device before step 3, the network device also sends indication information; correspondingly, the terminal device receives indication information from the network equipment, and the indication information is used to indicate the frequency point of the target cell to perform After cell reselection fails, cell reselection is performed based on the frequency point priority corresponding to the first cell frequency point; wherein the first cell frequency point includes at least one of the following:
  • the cell frequencies associated with one or more network slices included in the network slice set, the network slice set including the network slice that the terminal device expects to access; or, the cell frequency points not associated with the network slice; or, the network slice The frequency points of cells associated with one or more network slice groups included in the group set, the network slice group set including the network slice group corresponding to the network slice that the terminal device expects to access; or, cells not associated with the network slice group frequency point; or, one or more cell frequency points associated with network slice groups other than the network slice group with the highest priority in the target network slice group indicated by the priority information.
  • the terminal device can also receive the indication information, so that the terminal device can perform cell reselection based on the target cell frequency point (one or more cell frequency points corresponding to SG2) in step 3, based on the
  • the indication information specifies that after the cell reselection based on the frequency point of the target cell fails, the terminal device may perform cell reselection based on the frequency point priority corresponding to the frequency point of the first cell.
  • the terminal device fails to perform cell reselection based on the frequency point of the target cell, it can further perform cell reselection based on the indication information, so as to further improve the success rate of performing cell reselection by the terminal device.
  • the first cell frequency does not include one or more cell frequencies associated with network slice groups other than the network slice group with the highest priority in the target network slice group indicated by the priority information.
  • the terminal device performs cell reselection in step 3 including: the terminal device determines to perform cell reselection based on one or more cell frequency points corresponding to SG2 After the selection fails, the terminal device performs cell reselection based on the second cell frequency (that is, one or more cell frequencies corresponding to SG3); after the terminal device determines that the cell reselection based on the second cell frequency fails, the The terminal device performs cell reselection based on the frequency point of the first cell.
  • the indication information may be an information element with variable values (for example, one or more Boolean values, one or more bit values, etc.), or the indication information may be an optional information element, and its implementation may refer to Relevant descriptions in the foregoing step S202 and corresponding technical effects are achieved, and details are not repeated here.
  • the terminal may perform multiple cell reselection processes based on multiple implementations of the frequency point of the first cell, which will be described below in conjunction with some implementation examples.
  • the terminal device after the terminal device fails to perform cell reselection at one or more cell frequencies corresponding to SG2 in step 3, the terminal device performs cell reselection based on one or more cell frequencies corresponding to SG1 and SG3.
  • the frequency point of the first cell includes one or more network slice groups associated with other network slice groups in the target network slice group indicated by the priority information except for the network slice group with the highest priority.
  • the "other network slice group" includes SG3.
  • the terminal device after the terminal device fails to perform cell reselection at one or more cell frequencies corresponding to SG2 in step 3, the terminal device performs cell reselection based on one or more cell frequencies corresponding to SG3.
  • the terminal device uses the SG2 corresponding After one or more cell frequencies fail to perform cell reselection, the terminal device falls back to a traditional (legacy) cell reselection process.
  • one or more cell frequency points included in the first cell frequency point need not be determined based on network slices (and/or network slice groups).
  • the frequency point of the first cell may include any one of the five items in the above "at least one item” as an example for illustration.
  • the terminal device may determine the order of execution of the at least two items through configuration or pre-configuration
  • the implementation process of each of the at least two items reference may be made to the description of the above example, and details are not repeated here.
  • the implementation example 3 is an implementation example of the aforementioned implementation manner 2.
  • Step 1 The terminal device determines the target network slice group corresponding to the target network slice.
  • the NAS layer of the terminal device determines that the target network slices are S1, S2, and S4, and it is known that the corresponding relationship between the target network slice group and the associated NSSAI is valid in the current RA, then according to the S-NSSAI of S1, S2, and S4, pass the corresponding The relationship finds the corresponding target network slice group, namely SG1, SG2, SG3, SG4.
  • Step 2 The terminal device determines priority information of the target network slice group based on the first information.
  • the terminal device determines the priority of the target network slice group according to the first information (including the number of associated network slices in the target network slice group and the priority corresponding to each network slice) in step 2.
  • the implementation form of the priority information may be a specific assignment of the priority corresponding to each target network slice group, or it may be a list of target network slice groups sorted according to certain rules.
  • each piece of information included in the above-mentioned first information sequentially participates in the determination process of "determining priority information" includes the following implementations.
  • the terminal device may perform screening based on the number of target network slices contained in each network slice group in the target network slice group, so as to determine the priority information.
  • Method 2 The NAS layer of the terminal device forwards the S-NSSAI and the corresponding relationship of the target network slices, namely S1, S2, and S4, to the AS layer, and then obtains the target according to the S-NSSAI of S1, S2, and S4 at the AS layer through the corresponding relationship.
  • the terminal device may determine priority information based on the number of network slices contained in each network slice group in the target network slice group. Specifically, the terminal device sets priority according to the number of slices associated with the target network slice group, and the more slices are associated with it, the higher the priority of the corresponding target network slice group.
  • SG1, SG2, and SG3 are respectively associated with 3, 4, and 3 network slices, then it can be known that SG2 has the highest priority, and the priorities of SG1 and SG3 need to be further differentiated (step 2
  • the rest of the process and implementation Example 2 is similar, for details, please refer to the aforementioned implementation process).
  • Method 1 The NAS layer of the terminal device obtains the priority of the target network slice group according to the target network slice group identifier, the number of slices associated in the target network slice group, and the priority corresponding to each network slice;
  • Method 2 The NAS layer of the terminal device forwards the target network slice group identifier, the number of slices associated with the target network slice group, and the priority corresponding to each network slice to the AS layer, and then obtains the target network slice group based on the above information at the AS layer priority.
  • Step 3 Perform cell reselection according to the frequency point priority corresponding to the target network slice group with the highest priority.
  • step 2 it can be seen that the target network slice group with the highest priority is SG2, and the cell reselection of the terminal device is performed according to the frequency point (reselection) priority of the broadcast corresponding to SG2.
  • any implementation example in the implementation example 2 and the implementation example 3 may be implemented through the process shown in FIG. 9 .
  • the target network slice is marked as Intended Slice
  • the identifier of the target network slice group is marked as Intended Slice Group ID(s).
  • the process shown in FIG. 9 specifically includes the following steps.
  • the terminal device traverses the Intended Slice.
  • the terminal device determines whether the number of slices associated with multiple Intended Slice Group IDs is the same? If yes, execute step A6; if not, execute step A4.
  • step A4 When the terminal device determines in step A3 that the number of slices associated with multiple Intended Slice Group IDs is different, the terminal device determines that the greater the number of slices, the higher the priority of the corresponding Intended Slice Group ID, and execute step A5.
  • the terminal device performs cell reselection according to the frequency point priority corresponding to the highest priority Intended Slice Group ID.
  • the terminal device may receive from the network device "indicates that after the cell reselection based on the frequency point of the target cell fails, perform cell reselection based on the frequency point priority corresponding to the frequency point of the first cell.” instruction information".
  • the terminal device fails to perform cell reselection based on the frequency point priority corresponding to the highest priority Intended Slice Group ID, then the terminal device needs to further Perform cell reselection at the frequency point of the first cell.
  • step A6 When the terminal device determines in step A3 that the number of slices associated with the Intended Slice Group ID is the same, the terminal device determines whether the sum of the slice priorities of the network slices associated with multiple Intended Slice Group IDs is the same? If yes, execute step A8; if not, execute step A7.
  • step A7 When the terminal device determines in step A6 that the sum of slice priorities of network slices associated with multiple Intended Slice Group IDs is different, the terminal device determines that the greater the sum of network slice priorities, the higher the priority of the corresponding Intended Slice Group ID high, and go to step A5.
  • step A8 When the terminal device determines in step A6 that the sum of slice priorities of the network slices associated with multiple Intended Slice Group IDs is the same, the terminal device finds the slice with the highest priority among the slices associated with the Intended Slice Group ID and executes step A9 .
  • the terminal device judges whether the priorities corresponding to the slices are the same? If yes, execute step A11; if not, execute step A10.
  • step A10 When the terminal device determines that the priority corresponding to the slice is different in step A9, the terminal device determines that the priority corresponding to the slice with the highest priority is higher, and the priority of the corresponding Intended Slice Group ID is higher, and execute the steps A5.
  • step A9 When the terminal device determines that the slices correspond to the same priority in step A9, continue to find the slice with the highest priority in the remaining slices, and execute step A9.
  • the terminal device determines the corresponding relationship between the network slice and the network slice group in step A5 (the implementation process of the corresponding relationship can refer to the description of the aforementioned FIG.
  • the terminal device determines that the frequency point corresponding to the highest priority Intended Slice Group ID determined based on step A4 (or step A7, or step A10) can not be prioritized level for cell reselection. Thereafter, the terminal device may perform cell reselection based on the frequency priority corresponding to the default network slice group including one or more default network slices, so as to improve the success rate of cell reselection.
  • the implementation process of the above implementation example 2 to implementation example 3 may also be implemented through the process shown in FIG. 10a. As shown in Figure 10a, the process includes the following steps.
  • the terminal equipment is marked as UE
  • the network equipment including access network equipment is marked as gNB
  • the core network equipment is marked as CN as an example for illustration.
  • the CN sends a NAS message to the UE through the gNB, and the NAS message includes the correspondence between the Slice Group ID(S) and the S-NSSAI(S), and the priority of the S-NSSAI(S).
  • the gNB sends a broadcast message to the UE.
  • the broadcast message includes network slice information (Slice Info) based on the Slice Group ID.
  • the Slice Info includes cell frequency point information.
  • Optional implementation mode 1 the NAS layer of the UE obtains the Intended Slice Group ID(S) according to the corresponding relationship.
  • Optional implementation mode 2 the AS layer of the UE obtains the Intended Slice Group ID(S) according to the corresponding relationship forwarded by the NAS layer.
  • the NAS layer of the UE determines the priority of the Intended Slice Group ID according to the number of slices associated in the Intended Slice Group ID(S) and the priority corresponding to each slice.
  • the AS layer of the UE determines the priority of the Intended Slice Group ID according to the number of slices associated with the Intended Slice Group ID (S) forwarded by the NAS layer and the priority corresponding to each slice.
  • cell reselection is performed according to the frequency point priority corresponding to the highest priority Intended Slice Group ID.
  • the process shown in FIG. 10a can also be realized through the process shown in FIG. 10b.
  • the broadcast message may also include "indicating information for indicating that cell reselection based on the frequency point priority corresponding to the first cell frequency point is performed after the cell reselection based on the frequency point of the target cell fails. ".
  • indication information for indicating that cell reselection based on the frequency point priority corresponding to the first cell frequency point is performed after the cell reselection based on the frequency point of the target cell fails.
  • the terminal device may base on the first indicated by the indication information Cell reselection is performed at a cell frequency, so as to increase the success rate of cell reselection of the terminal equipment.
  • the "indication information" is described as an example in the broadcast message carried in step 2.
  • the "indication information” can also be carried in other messages, such as RRC messages, MAC CE messages or The DCI message, etc., or other messages, are not limited here.
  • Example 2 it can not only reduce system overhead and ensure transmission security, but also determine the priority of the Slice Group ID to adapt to the cell reselection scheme based on the granularity of the network slice group and the triggering of the MO. Business scene.
  • Implementation example 4 it is an implementation example of the aforementioned implementation manner 2.
  • Step 1 The terminal device determines the target network slice group corresponding to the target network slice.
  • the NAS layer of the terminal device determines that the target network slice is S3, and the corresponding relationship between the target network slice group and the associated NSSAI is known to be valid in the current RA, then find the corresponding target network slice group through the corresponding relationship according to the S-NSSAI of S3 , namely SG1, SG2, SG4.
  • Step 2 The terminal device determines priority information of the target network slice group based on the first information.
  • the terminal device determines the priority of the target network slice group according to the first information (including the priorities corresponding to associated network slices in the target network slice group).
  • the implementation form of the priority information may be a specific assignment of the priority corresponding to each target network slice group, or it may be a list of target network slice groups sorted according to certain rules.
  • each piece of information included in the above-mentioned first information sequentially participates in the determination process of "determining priority information" includes the following implementations.
  • the terminal device may perform screening based on the number of target network slices contained in each network slice group in the target network slice group, so as to determine the priority information.
  • the NAS layer of the terminal device forwards the target network slice, that is, the S-NSSAI of S3 and the corresponding relationship to the AS layer, and then obtains the target network slice group as the network slice group according to the corresponding relationship based on the NSSAI of S3 at the AS layer.
  • the target network slice that is, the S-NSSAI of S3 and the corresponding relationship to the AS layer
  • the target network slice group as the network slice group according to the corresponding relationship based on the NSSAI of S3 at the AS layer.
  • the terminal device may determine the priority information based on the network slice priority information included in the target network slice group.
  • the terminal device sets the priority of the network slice group according to the priority corresponding to the network slice with the highest priority associated with each network slice group in the target network slice group, and the associated network slice with the highest priority The higher the corresponding priority, the higher the corresponding target network slice group priority. If the priority corresponding to the network slice with the highest priority is the same, continue to find the network slice with the highest priority among the remaining slices, and so on, until the priority of the target network slice group is distinguished. If a certain group of SGx associations occurs The network slice has been traversed and there is another group of SGy still traversing, then the default P(SGx) ⁇ P(SGy) (that is, the priority corresponding to the network slice associated with SGx is a subset of SGy).
  • the priorities corresponding to the network slices with the highest priority among the network slices associated with SG1, SG2, and SG4 are P(S4), P(S5), and P(S4), respectively.
  • ⁇ P(S5) shows that SG2 corresponds to the highest priority.
  • Method 1 The NAS layer of the terminal device obtains the priority of the target network slice group according to the target network slice group identifier and the priorities corresponding to the associated network slices in the target network slice group.
  • Method 2 The NAS layer of the terminal device forwards the target network slice group identifier and the priority corresponding to each network slice associated in the target network slice group to the AS layer, and then the AS layer obtains the priority of the target network slice group based on the above information .
  • Step 3 the terminal device performs cell reselection according to the priority information obtained in step 2.
  • the terminal device performs cell reselection according to the frequency point priority corresponding to the target network slice group with the highest priority.
  • the target network slice group with the highest priority is SG2
  • the cell reselection of the terminal device is performed according to the frequency point (reselection) priority broadcast corresponding to SG2.
  • Implementation Example 5 is an implementation example of the foregoing implementation manner 2.
  • Step 1 The terminal device determines the target network slice group corresponding to the target network slice.
  • the NAS layer of the terminal device determines that the target network slices are S1, S2, and S4, and it is known that the corresponding relationship between the target network slice group and the associated NSSAI is valid in the current RA, then according to the S-NSSAI of S1, S2, and S4, pass the corresponding The relationship finds the corresponding target network slice group, namely SG1, SG2, SG3, SG4.
  • Step 2 The terminal device determines priority information of the target network slice group based on the first information.
  • the terminal device determines the priority of the target network slice group according to the first information (including the priorities corresponding to associated network slices in the target network slice group).
  • the implementation form of the priority information may be a specific assignment of the priority corresponding to each target network slice group, or it may be a list of target network slice groups sorted according to certain rules.
  • each piece of information contained in the above-mentioned first information sequentially participates in the determination process of "determining priority information" includes the following implementations.
  • the terminal device may perform screening based on the number of target network slices contained in each network slice group in the target network slice group, so as to determine the priority information.
  • Method 2 The NAS layer of the terminal device forwards the S-NSSAI and the corresponding relationship of the target network slices, namely S1, S2, and S4, to the AS layer, and then obtains the Intended in the AS layer according to the S-NSSAI of S1, S2, and S4 through the corresponding relationship.
  • Slice Group ID(s) SG1, SG2, SG3;
  • the terminal device may determine the priority information based on the network slice priority information included in the target network slice group.
  • the terminal device sets the priority of the network slice group according to the priority corresponding to the network slice with the highest priority associated with each network slice group in the target network slice group, and the associated network slice with the highest priority The higher the corresponding priority, the higher the corresponding target network slice group priority. If the priority corresponding to the network slice with the highest priority is the same, continue to find the network slice with the highest priority among the remaining network slices, and so on, until the priority of the target network slice group is distinguished. If a certain group of SGx The associated network slice has been traversed and there is another group of SGy still traversing, then the default P(SGx) ⁇ P(SGy) (that is, the priority corresponding to the network slice associated with SGx is a subset of SGy).
  • the priorities corresponding to the network slices with the highest priority among the network slices associated with SG1, SG2, and SG3 are P(S4), P(S5), and P(S5), respectively.
  • ⁇ P(S5) shows that SG1 corresponds to the lowest priority.
  • Method 1 The NAS layer of the terminal device obtains the priority of the target network slice group according to the target network slice group identifier and the priorities corresponding to the associated network slices in the target network slice group.
  • Method 2 The NAS layer of the terminal device forwards the target network slice group identifier and the priority corresponding to each network slice associated in the target network slice group to the AS layer, and then the AS layer obtains the priority of the target network slice group based on the above information .
  • Step 3 the terminal device performs cell reselection according to the priority information obtained in step 2.
  • the terminal device performs cell reselection according to the frequency point priority corresponding to the target network slice group with the highest priority.
  • the target network slice group with the highest priority is SG2
  • the cell reselection of the terminal device is performed according to the frequency point (reselection) priority broadcast corresponding to SG2.
  • any implementation example in the implementation example 4 and the implementation example 5 may be implemented through the process shown in FIG. 11 .
  • the process shown in FIG. 11 specifically includes the following steps.
  • the terminal device traverses the Intended Slice.
  • the terminal device finds the slice with the highest priority among the slices associated with the Intended Slice Group ID and executes step B4.
  • the terminal device judges whether the priorities corresponding to the slices are the same? If yes, execute step B5; if not, execute step B8.
  • step B5 determines whether there is a group of slices associated with SGx that have been traversed first? If yes, execute step B7; if not, execute step B6.
  • step B6 When the terminal device determines in step B5 that none of the slices associated with a group of SGx has been traversed first, it continues to find the slice with the highest priority among the remaining slices in step B6, and executes step B4.
  • step B7 When the terminal device determines in step B5 that slices associated with a certain group of SGx have been traversed first, the terminal device determines that P(SGx) ⁇ P(SGy), and executes step B8.
  • the terminal device determines that the slice with the highest priority corresponds to a higher priority, and the corresponding Intended Slice Group ID has a higher priority.
  • the terminal device performs cell reselection according to the frequency point priority corresponding to the highest priority Intended Slice Group ID.
  • the terminal device may receive from the network device "indicates that after the cell reselection based on the frequency point of the target cell fails, perform cell reselection based on the frequency point priority corresponding to the frequency point of the first cell.” instruction information".
  • the terminal device fails to perform cell reselection based on the frequency point priority corresponding to the highest priority Intended Slice Group ID, then the terminal device needs to further Perform cell reselection at the frequency point of the first cell.
  • the terminal device determines the corresponding relationship between the network slice and the network slice group in step B9 (the implementation process of the corresponding relationship can refer to the description in FIG.
  • the terminal device determines that cell reselection cannot be performed based on the frequency point priority corresponding to the highest priority Intended Slice Group ID determined in step B8. Thereafter, the terminal device may perform cell reselection based on the frequency priority corresponding to the default network slice group including one or more default network slices, so as to improve the success rate of cell reselection.
  • the implementation processes of the fourth implementation example to the fifth implementation example above may also be implemented through the process shown in FIG. 12a. As shown in Figure 12a, the process includes the following steps.
  • the terminal equipment is marked as UE
  • the network equipment including access network equipment is marked as gNB
  • the core network equipment is marked as CN as an example for illustration.
  • the CN sends a NAS message to the UE through the gNB, and the NAS message includes the correspondence between the Slice Group ID(S) and the S-NSSAI(S), and the priority of the S-NSSAI(S).
  • the gNB sends a broadcast message to the UE.
  • the broadcast message includes network slice information (Slice Info) based on the Slice Group ID.
  • the Slice Info includes cell frequency point information.
  • Optional implementation mode 1 the NAS layer of the UE obtains the Intended Slice Group ID(S) according to the corresponding relationship.
  • Optional implementation mode 2 the AS layer of the UE obtains the Intended Slice Group ID(S) according to the corresponding relationship forwarded by the NAS layer.
  • the NAS layer of the UE determines the priority of the Intended Slice Group ID according to the priority corresponding to each slice associated with the Intended Slice Group ID(S).
  • the AS layer of the UE determines the priority of the Intended Slice Group ID according to the priority corresponding to each slice in the Intended Slice Group ID (S) forwarded by the NAS layer.
  • cell reselection is performed according to the frequency point priority corresponding to the highest priority Intended Slice Group ID.
  • the process shown in FIG. 12a can also be realized through the process shown in FIG. 12b.
  • the broadcast message may also include "indicating information for indicating that cell reselection based on the frequency point priority corresponding to the first cell frequency point is performed after the cell reselection based on the target cell frequency point fails.” ".
  • indication information for indicating that cell reselection based on the frequency point priority corresponding to the first cell frequency point is performed after the cell reselection based on the target cell frequency point fails.
  • the terminal device may base on the first indicated by the indication information Cell reselection is performed at a cell frequency, so as to increase the success rate of cell reselection of the terminal equipment.
  • the "indication information" is described as an example in the broadcast message carried in step 2.
  • the "indication information” can also be carried in other messages, such as RRC messages, MAC CE messages or The DCI message, etc., or other messages, are not limited here.
  • Example 4 it can not only reduce system overhead and ensure transmission security, but also determine the priority of Slice Group ID to adapt to the cell reselection scheme based on the granularity of the network slice group and the triggering of MO Business scene.
  • Implementation example six it is an implementation example of the foregoing implementation manner three.
  • Step 1 The terminal device determines the target network slice group corresponding to the target network slice.
  • the NAS layer of the terminal device determines that the target network slices are S1, S2, and S4, and it is known that the corresponding relationship between the target network slice group and the associated NSSAI is valid in the current PLMN, then according to the S-NSSAI of S1, S2, and S4, pass the corresponding The relationship finds the corresponding target network slice group, that is, the terminal device determines that the target network slice group is network slice group 1, network slice group 2, network slice group 3 and network slice group 4 (ie SG1, SG2, SG3, SG4).
  • Step 2 Determine the priority information of the target network slice group according to the historically used network slice information stored in the NAS by the terminal device.
  • the terminal device may perform screening in step 2 based on the number of target network slices contained in each network slice group in the target network slice group.
  • the terminal device since the number of target network slices (ie S1, S2, S4) contained in SG1, SG2, SG3 and SG4 is (2, 2, 2, 1). Therefore, the terminal device determines that the target network slice group needs to exclude some options (that is, exclude SG4). That is, the terminal device determines that the target network slice group is network slice group 1, network slice group 2 and network slice group 3 (ie SG1, SG2, SG3) after screening.
  • the process for the terminal device to determine the target network slice group as network slice group 1, network slice group 2 and network slice group 3 may include the following two implementations:
  • Method 2 The NAS layer of the terminal device forwards the S-NSSAI and the corresponding relationship of the target network slices, namely S1, S2, and S4, to the AS layer, and then obtains the target according to the S-NSSAI of S1, S2, and S4 at the AS layer through the corresponding relationship.
  • the priority of the target network slice group in this embodiment can be obtained from the information of the network slice used by the terminal device according to the history stored in the NAS (such as history).
  • the information of the used network slice is obtained from the number of times used, or recorded as the number of times indexed). For example, the target network slice group with more indexed times has a higher priority. method to further prioritize.
  • the priority form can be a specific assignment of the priority corresponding to each target network slice group, or it can be a list of target network slice groups sorted according to certain rules;
  • the target network can be obtained
  • Mode 1 The NAS layer of the terminal device directly obtains the priority of the target network slice group according to the historical information stored in the NAS.
  • Method 2 The NAS layer of the terminal device forwards the historical information stored in the NAS to the AS layer, and then the AS layer obtains the priority of the target network slice group according to the above information;
  • Step 3 the terminal device performs cell reselection according to the priority information obtained in step 2.
  • step 3 the terminal device performs cell reselection according to the frequency point priority corresponding to the target network slice group with the highest priority.
  • the target network slice group with the highest priority is SG1
  • the cell reselection of the terminal device is performed according to the broadcast frequency (reselection) priority corresponding to SG1.
  • the implementation processes of the first implementation example and the sixth implementation example may also be implemented through the process shown in FIG. 13a. As shown in Figure 13a, the process includes the following steps.
  • the terminal equipment is marked as UE
  • the network equipment including access network equipment is marked as gNB
  • the core network equipment is marked as CN as an example for illustration.
  • the CN sends a NAS message to the UE through the gNB, and the NAS message includes the correspondence between the Slice Group ID(S) and the S-NSSAI(S), and the priority of the S-NSSAI(S).
  • the gNB sends a broadcast message to the UE.
  • the broadcast message includes network slice information (Slice Info) based on the Slice Group ID.
  • the Slice Info includes cell frequency point information.
  • Optional implementation mode 1 the NAS layer of the UE obtains the Intended Slice Group ID(S) according to the corresponding relationship.
  • Optional implementation mode 2 the AS layer of the UE obtains the Intended Slice Group ID(S) according to the corresponding relationship forwarded by the NAS layer.
  • the NAS layer of the UE determines the priority of the Intended Slice Group ID according to the priority of the Slice Group ID (S) specified by the CN or the historical information of the UE.
  • the AS layer of the UE determines the priority of the Intended Slice Group ID according to the Slice Group ID (S) priority specified by the CN forwarded by the NAS layer or the historical information of the UE.
  • cell reselection is performed according to the frequency point priority corresponding to the highest priority Intended Slice Group ID.
  • the process shown in FIG. 13a can also be realized through the process shown in FIG. 13b.
  • the broadcast message may also include "Instruction information for indicating that cell reselection based on the frequency point priority corresponding to the first cell frequency point is performed after the cell reselection based on the frequency point of the target cell fails. ".
  • Indication information for indicating that cell reselection based on the frequency point priority corresponding to the first cell frequency point is performed after the cell reselection based on the frequency point of the target cell fails.
  • the terminal device may base on the first indicated by the indication information Cell reselection is performed at a cell frequency, so as to increase the success rate of cell reselection of the terminal equipment.
  • the "indication information" is described as an example in the broadcast message carried in step 2.
  • the "indication information” can also be carried in other messages, such as RRC messages, MAC CE messages or The DCI message, etc., or other messages, are not limited here.
  • Example 1 and Example 6 it can not only reduce system overhead and ensure transmission security, but also determine the priority of Slice Group ID to adapt to the cell reselection scheme based on the granularity of the network slice group and the triggering of MO. Business scene.
  • Cell 1 is a camping cell (Camping Cell) of a terminal device (denoted as UE), and Cell 2, Cell 3, and small Cell 4 are candidate cells of the UE.
  • UE Radio Network
  • the supported access frequency point is recorded as F1
  • the supported network slice includes network slice 1 (Slice 1).
  • the supported access frequency point is recorded as F2
  • the supported network slices include network slice 2 and network slice 4 (Slice 2, 4).
  • the supported access frequency point is recorded as F3
  • the supported network slice includes network slice 5 (Slice5).
  • the supported access frequency point is recorded as F4, and the supported network slice includes network slice 3 (Slice 3).
  • the relationship between different network slice groups and multiple network slices is determined according to the actual deployment of the cell (wherein, each network slice only corresponds to a certain network slice group, in other words, the different network slices), for example:
  • the above four cells are in the same RA (or TA or PLMN area), in other words, the correspondence between the above groups is valid in the four cells.
  • Network slice 1 network slice 2, network slice 3, network slice 4, and network slice 5 are recorded as: P(S1) ⁇ P(S3) ⁇ P(S5) ⁇ P(S4) ⁇ P(S2).
  • step 1 involved in the following implementation example 7 is an implementation example of step S201 in the aforementioned embodiment of FIG. 2
  • step 2 involved in the following implementation example 7 is recorded as An implementation example of step S202.
  • the implementation example 7 is an implementation example of the aforementioned implementation mode 2 (that is, the implementation process shown in the aforementioned FIG. 7 ).
  • Step 1 The terminal device determines the target network slice group corresponding to the target network slice with the highest priority.
  • Method 2 The NAS layer of the terminal device forwards the S-NSSAI of the target network slices, namely S1, S3, and S4, and their corresponding relationships and their corresponding priorities to the AS layer, and then the AS layer obtains the target network slice group as the network according to the above information.
  • Step 2 The terminal device performs cell reselection according to the target network slice group determined in step 1.
  • step 2 the terminal device performs cell reselection according to the frequency priority corresponding to the target network slice group.
  • step 1 the target network slice group is SG2, and the cell reselection of the terminal device is performed according to the broadcast frequency point (reselection) priority corresponding to SG2.
  • the implementation process of the seventh implementation example above may also be implemented through the process shown in FIG. 15a. As shown in Figure 15a, the process includes the following steps.
  • the terminal equipment is marked as UE
  • the network equipment including access network equipment is marked as gNB
  • the core network equipment is marked as CN as an example for illustration.
  • the CN sends a NAS message to the UE through the gNB, and the NAS message includes the correspondence between the Slice Group ID(S) and the S-NSSAI(S), and the priority of the S-NSSAI(S).
  • the gNB sends a broadcast message to the UE.
  • the broadcast message includes network slice information (Slice Info) based on the Slice Group ID.
  • the Slice Info includes cell frequency point information.
  • Optional implementation mode 1 the NAS layer of the UE obtains the Intended Slice Group ID(S) according to the corresponding relationship and the S-NSSAI(S) priority.
  • the AS layer of the UE obtains the Intended Slice Group ID (S) according to the corresponding relationship forwarded by the NAS layer and the S-NSSAI (S) priority.
  • cell reselection is performed according to the frequency point priority corresponding to the highest priority Intended Slice Group ID.
  • the process shown in FIG. 15a can also be realized through the process shown in FIG. 15b.
  • the broadcast message may also include "Instruction information for indicating that cell reselection based on the frequency point priority corresponding to the first cell frequency point is performed after the cell reselection based on the target cell frequency point fails.” ".
  • Indication information for indicating that cell reselection based on the frequency point priority corresponding to the first cell frequency point is performed after the cell reselection based on the target cell frequency point fails.
  • the terminal device may base on the first indicated by the indication information Cell reselection is performed at a cell frequency, so as to increase the success rate of cell reselection of the terminal equipment.
  • the "indication information" is described as an example in the broadcast message carried in step 2.
  • the "indication information” can also be carried in other messages, such as RRC messages, MAC CE messages or The DCI message, etc., or other messages, are not limited here.
  • Embodiment 7 it can not only reduce system overhead and ensure transmission security, but also determine the priority of Slice Group ID to adapt to the cell reselection scheme based on the granularity of the network slice group and the business scenario triggered by MO.
  • the corresponding relationship is valid in the current specific area and there is a one-to-one corresponding relationship, the corresponding Slice Group ID can be found through the corresponding relationship according to the S-NSSAI corresponding to the highest priority Intended Slice, and there is no need to further determine the Intended Slice Group ID ( s), the Slice Group ID is the Intended Slice Group ID.
  • FIG. 16 is a schematic diagram of an implementation of a communication device provided by an embodiment of the present application.
  • the communication device may specifically execute the implementation process involved in the terminal device in any of the foregoing embodiments.
  • the communication apparatus 1600 is used to execute the method for cell reselection involved in the foregoing terminal equipment, and the communication apparatus 1600 includes at least a processing unit 1601 .
  • the processing unit 1601 is configured to determine priority information of the target network slice group, where the priority information is used to indicate the priority of the target network slice group;
  • the processing unit 1601 is configured to perform cell reselection based on the cell frequency associated with the target network slice group determined by the priority information.
  • the communication apparatus 1600 is used to execute the method for cell reselection involved in the foregoing terminal equipment, and the communication apparatus 1600 includes at least a processing unit 1601 .
  • the processing unit 1601 is configured to determine a frequency point of a cell associated with the target network slice group
  • the processing unit 1601 is configured to perform cell reselection based on the cell frequency point associated with the target network slice group.
  • the target network slice group includes a network slice that the terminal device expects to access.
  • the network slice that the terminal device expects to access includes at least one of the following: the network slice indicated by the allowed NSSAI information element, the network slice indicated by the requested NSSAI information element, the suspended NSSAI information element The network slice indicated by the element or the network slice related to the mobile origination traffic service.
  • the target network slice group includes a default network slice.
  • the target network slice group is determined by the correspondence between the network slice and the network slice group, and the correspondence between the network slice and the network slice group is in the first area where the terminal device is currently located.
  • the target network slice group includes a default network slice, wherein the first area includes a registration area (registration area, RA), a tracking area (tracking area, TA) or a public land mobile network (public land mobile network, PLMN) area .
  • the apparatus further includes a transceiver unit 1602; the processing unit 1601, configured to determine the priority information of the target network slice group includes:
  • the processing unit 1601 is configured to receive the priority information from the network device through the transceiver unit 1602 .
  • the processing unit 1601 is configured to determine the priority information of the target network slice group including:
  • the processing unit 1601 is configured to determine the priority information based on historically used network slice information.
  • the priority information is determined by the quantity and/or priority information of network slices included in each network slice group in the target network slice group.
  • the processing unit 1601 is configured to perform cell reselection based on the cell frequency associated with the target network slice group determined by the priority information includes:
  • the processing unit 1601 is configured to perform cell reselection based on the frequency point of the target cell determined by the priority information, where the frequency point of the target cell is the one associated with the network slice group with the highest priority in the target network slice group or multiple cell frequencies.
  • the transceiving unit 1602 is further configured to receive indication information, where the indication information is used to indicate that after the cell reselection based on the frequency of the target cell fails, the frequency corresponding to the frequency of the first cell Priority cell reselection; wherein, the frequency of the first cell includes at least one of the following:
  • One or more cell frequency points associated with network slice groups other than the highest priority network slice group in the target network slice group indicated by the priority information are selected from the highest priority network slice group in the target network slice group indicated by the priority information.
  • the indication information includes at least one of the following: the number of cell reselections based on the first cell frequency, the duration of cell reselection based on the first cell frequency, The starting time of cell reselection at the cell frequency or the termination time of cell reselection based on the first cell frequency.
  • the communication device 1600 is configured to execute the communication method involved in the aforementioned network device, and the communication device 1600 includes a processing unit 1601 and a transceiver unit 1602 .
  • the processing unit 1601 is configured to determine priority information of the target network slice group, where the priority information is used to indicate the priority of the target network slice group;
  • the transceiver unit 1602 is configured to send the priority information.
  • the transceiving unit 1602 is further configured to send indication information, where the indication information is used to indicate that after the cell reselection based on the frequency point of the target cell fails, the frequency point corresponding to the frequency point of the first cell Priority cell reselection; wherein, the frequency of the first cell includes at least one of the following:
  • One or more cell frequency points associated with network slice groups other than the highest priority network slice group in the target network slice group indicated by the priority information are selected from the highest priority network slice group in the target network slice group indicated by the priority information.
  • the indication information includes at least one of the following: the number of cell reselections based on the first cell frequency, the duration of cell reselection based on the first cell frequency, The starting time of cell reselection at the cell frequency or the termination time of cell reselection based on the first cell frequency.
  • FIG. 17 is the communication device involved in the above-mentioned embodiments provided for the embodiments of the present application.
  • the communication device 1700 may be the terminal device shown in any of the foregoing embodiments, or, the communication device 1700 may be a part of the terminal device shown in any of the foregoing embodiments (such as a processor, a chip or a chip system, etc.) .
  • a schematic diagram of a possible logical structure of the communication device 1700 may include but not limited to at least one processor 1701 and a communication port 1702 . Further optionally, the device may further include a memory 1703 and a bus 1704. In the embodiment of the present application, the at least one processor 1701 is configured to control and process actions of the communication device 1700.
  • the communication device 1700 may be configured to execute the method described in any one of the embodiments shown in FIGS. 2 to 15b. Taking FIG. 2 as an example, the communication device 1700 may determine the priority information of the target network slice group in step S201, and the communication device 1700 may also determine the cell associated with the target network slice group based on the priority information in step S202 Frequency point for cell reselection.
  • the processor 1701 may be a central processing unit, a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination that realizes computing functions, for example, a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like.
  • the communication device 1700 shown in FIG. 17 can be specifically used to implement other steps implemented by the terminal device in the foregoing corresponding method embodiments, and realize the corresponding technical effects of the terminal device.
  • the specific implementation of the communication device 1700 shown in FIG. 17 For the methods, reference may be made to the descriptions in the foregoing method embodiments, and details are not repeated here.
  • FIG. 18 is a schematic structural diagram of a network device or some components (such as a processor, a chip, or a chip system, etc.) involved in the above-mentioned embodiments provided by an embodiment of the present application.
  • description will be made by taking the structural diagram shown in FIG. 18 as an example of a schematic structural diagram of a network device.
  • the network device may include an access network device or a core network device.
  • the schematic structural diagram of a network device shown in FIG. 18 may be used to execute the method described in any one of the embodiments shown in FIGS. 2 to 15b. Taking FIG. 4 as an example, the network device may send first indication information to the terminal device in step S401.
  • the network device includes at least one processor 1811 .
  • the network device may also include a target network interface 1814 .
  • the network device further includes a target memory 1812 , a target transceiver 1813 and one or more antennas 1815 .
  • the processor 1811, the memory 1812, the transceiver 1813 and the network interface 1814 are connected, for example, through a bus. In this embodiment of the application, the connection may include various interfaces, transmission lines or buses, which are not limited in this embodiment.
  • the antenna 1815 is connected to the transceiver 1813 .
  • the network interface 1814 is used to enable network devices to communicate with other communication devices through communication links.
  • the network interface 1814 may include a network interface between the network device and the core network device, such as an S1 interface, and the network interface may include a network interface between the network device and other network devices (such as other network devices or core network devices), such as X2 Or Xn interface.
  • the processor 1811 is mainly used to process communication protocols and communication data, control the entire network device, execute software programs, and process data of software programs, for example, to support network devices to perform actions described in the embodiments.
  • a network device may include a baseband processor and a central processor.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processor is mainly used to control the entire terminal device, execute software programs, and process data of the software programs.
  • the processor 1811 in FIG. 18 can integrate the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors, interconnected through technologies such as a bus.
  • a terminal device may include multiple baseband processors to adapt to different network standards, a terminal device may include multiple central processors to enhance its processing capability, and various components of the terminal device may be connected through various buses.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit may also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • Memory is primarily used to store software programs and data.
  • the memory 1812 may exist independently and be connected to the processor 1811 .
  • the memory 1812 may be integrated with the processor 1811, for example, integrated into one chip.
  • the memory 1812 can store program codes for implementing the technical solutions of the embodiments of the present application, and the execution is controlled by the processor 1811 , and various types of computer program codes to be executed can also be regarded as drivers for the processor 1811 .
  • Figure 18 shows only one memory and one processor. In an actual terminal device, there may be multiple processors and multiple memories.
  • a memory may also be called a storage medium or a storage device.
  • the memory may be a storage element on the same chip as the processor, that is, an on-chip storage element, or an independent storage element, which is not limited in this embodiment of the present application.
  • the transceiver 1813 may be used to support receiving or sending radio frequency signals between the network device and the terminal, and the transceiver 1813 may be connected to the antenna 1815 .
  • the transceiver 1813 includes a transmitter Tx and a receiver Rx.
  • one or more antennas 1815 can receive radio frequency signals
  • the receiver Rx of the transceiver 1813 is used to receive the radio frequency signals from the antennas, convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and convert the digital baseband
  • the signal or the digital intermediate frequency signal is provided to the processor 1811, so that the processor 1811 performs further processing on the digital baseband signal or digital intermediate frequency signal, such as demodulation processing and decoding processing.
  • the transmitter Tx in the transceiver 1813 is also used to receive the modulated digital baseband signal or digital intermediate frequency signal from the processor 1811, convert the modulated digital baseband signal or digital intermediate frequency signal into a radio frequency signal, and pass a The radio frequency signal is transmitted by one or more antennas 1815 .
  • the receiver Rx can selectively perform one or more stages of down-mixing processing and analog-to-digital conversion processing on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal.
  • the order of the down-mixing processing and analog-to-digital conversion processing The order is adjustable.
  • the transmitter Tx can selectively perform one or more stages of up-mixing processing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal.
  • the up-mixing processing and digital-to-analog conversion processing The sequence is adjustable.
  • Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals.
  • a transceiver may also be called a transceiver unit, a transceiver, a transceiver device, and the like.
  • the device used to realize the receiving function in the transceiver unit can be regarded as a receiving unit
  • the device used to realize the sending function in the transceiver unit can be regarded as a sending unit, that is, the transceiver unit includes a receiving unit and a sending unit, and the receiving unit also It can be called receiver, input port, receiving circuit, etc., and the sending unit can be called transmitter, transmitter, or transmitting circuit, etc.
  • network device shown in Figure 18 can specifically be used to implement the steps implemented by the network device in the foregoing method embodiments, and achieve the corresponding technical effects of the network device, and the specific implementation of the network device shown in Figure 18 can be Reference is made to the descriptions in the foregoing method embodiments, and details are not repeated here.
  • the embodiment of the present application also provides a computer-readable storage medium storing one or more computer-executable instructions.
  • the processor executes the Methods.
  • Embodiments of the present application also provide a computer-readable storage medium storing one or more computer-executable instructions.
  • the processor executes the network device as described in the possible implementation manners of the foregoing embodiments. Methods.
  • the embodiment of the present application also provides a computer program product (or computer program) storing one or more computers, and when the computer program product is executed by the processor, the processor executes the method of the above-mentioned possible implementation manner of the terminal device.
  • the embodiment of the present application also provides a computer program product storing one or more computers, and when the computer program product is executed by the processor, the processor executes the method of the above-mentioned possible implementation manner of the network device.
  • An embodiment of the present application further provides a system on chip, where the system on chip includes at least one processor, configured to support a terminal device to implement the functions involved in the foregoing possible implementation manners of the terminal device.
  • the chip system further includes an interface circuit, and the interface circuit provides program instructions and/or data for the at least one processor.
  • the system-on-a-chip may further include a memory, and the memory is used for storing necessary program instructions and data of the terminal device.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • An embodiment of the present application further provides a chip system, which includes at least one processor, configured to support a network device to implement the functions involved in the above possible implementation manners of the network device.
  • the chip system further includes an interface circuit, and the interface circuit provides program instructions and/or data for the at least one processor.
  • the chip system may further include a memory, and the memory is used for storing necessary program instructions and data of the network device.
  • the system-on-a-chip may consist of a chip, or may include a chip and other discrete devices, wherein the network device may specifically be the network device in the aforementioned method embodiments.
  • An embodiment of the present application also provides a communication system, where the network system architecture includes the terminal device and the network device in any of the foregoing embodiments.
  • the disclosed system, device and method can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of this application or the part that contributes or all or part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium and includes several instructions.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

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Abstract

本申请提供了一种小区重选的方法及通信装置，用于提供在网络切片的场景中进行小区重选的方案，以提高小区重选的成功率，提升通信效率。在该方法中，终端设备确定目标网络切片组的优先级信息，该优先级信息用于指示该目标网络切片组的优先级；该终端设备基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选。在一些实现方式中，该目标网络切片组包括终端设备期望接入的网络切片或默认网络切片。

Description

一种小区重选的方法及通信装置
本申请要求于2021年10月09日提交中国专利局、申请号为202111177627.0、发明名称为“一种小区重选的方法及通信装置”的中国专利申请的优先权，和要求于2022年01月07日提交中国专利局、申请号为202210017906.9、发明名称为“一种小区重选的方法及通信装置”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
本申请涉及无线技术领域，尤其涉及一种小区重选的方法及通信装置。
背景技术
随着移动通信技术的发展，各类新业务以及应用场景不断涌现，这些业务对网络功能、连接性能及安全性等方面的需求存在很大的差别。为了满足不同的业务需求，可以通过网络切片(Network Slicing)为用户提供定制化的网络服务。
然而，在网络切片的场景中，终端设备如何进行小区重选，是一个亟待解决的技术问题。
发明内容
本申请提供了一种小区重选的方法及通信装置，应用在网络切片的场景中。
本申请第一方面提供了一种小区重选的方法，该方法由终端设备执行，或者，该方法由终端设备中的部分组件(例如处理器、芯片或芯片系统等)执行，或者该方法还可以由能实现全部或部分终端设备功能的逻辑模块或软件实现。在第一方面及其可能的实现方式中，以该小区重选的方法由终端设备执行为例进行描述。在该方法中，终端设备确定目标网络切片组的优先级信息，该优先级信息用于指示该目标网络切片组的优先级；该终端设备基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选。
基于上述技术方案，终端设备在确定用于指示该目标网络切片组的优先级信息之后，该终端设备在执行小区重选的过程中，该终端设备基于该优先级信息所确定的目标网络切片组所关联的小区频点进行小区重选。换言之，该终端设备基于目标网络切片组的优先级所确定的该目标网络切片组所关联的小区频点进行小区重选。其中，在网络切片的场景中，终端设备在小区重选的过程中所使用的小区频点基于网络切片组的粒度而配置的情况下，终端设备基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选的方案，使得终端设备以网络切片组为小区重选的粒度进行小区重选。从而，该小区重选的方案适配于基于网络切片组进行通信的场景的同时，也能提高小区重选的成功率，提升通信效率。
此外，终端设备基于网络切片组的优先级信息以确定目标小区的小区重选方式中，网络设备将网络切片组关联的小区重选信息(例如小区频点信息)作为向终端设备发送的一个信息，并将网络切片组所包含的网络切片的切片信息作为向终端设备发送的另一个信息，通过分开发送的方式(相比于通过同一条广播消息发送的方式)可以在提升信息传输安全 性的同时，降低广播开销。
本申请实施例中，目标网络切片组包括一个或多个网络切片组，其中，每一个网络切片组中包括一个或多个网络切片。
本申请第二方面提供了一种小区重选的方法，该方法由终端设备执行，或者，该方法由终端设备中的部分组件(例如处理器、芯片或芯片系统等)执行，或者该方法还可以由能实现全部或部分终端设备功能的逻辑模块或软件实现。在第二方面及其可能的实现方式中，以该小区重选的方法由终端设备执行为例进行描述。在该方法中，终端设备确定目标网络切片组所关联的小区频点；该终端设备基于该目标网络切片组所关联的小区频点进行小区重选。
基于上述技术方案，终端设备在执行小区重选的过程中，该终端设备基于目标网络切片组所关联的小区频点进行小区重选。其中，在网络切片的场景中，终端设备在小区重选的过程中所使用的小区频点基于网络切片组的粒度而配置的情况下，终端设备基于该目标网络切片组所关联的小区频点进行小区重选的方案，使得终端设备以网络切片组为小区重选的粒度进行小区重选。从而，该小区重选的方案适配于基于网络切片组进行通信的场景的同时，也能提高小区重选的成功率，提升通信效率。
可选的，在第二方面的一种可能的实现方式中，目标网络切片组所包含的网络切片组的数量为1。
可选的，在第二方面的一种可能的实现方式中，目标网络切片组所包含的网络切片组的数量为多个。该终端设备基于该目标网络切片组所关联的小区频点进行小区重选的过程可以包括，该终端设备确定目标网络切片组的优先级信息；其中，该优先级信息用于指示目标网络切片组的优先级；该终端设备基于该优先级信息所确定的目标网络切片组所关联的小区频点进行小区重选。
在第一方面或第二方面的一种可能的实现方式中，目标网络切片组包括终端设备期望接入的网络切片。
基于上述技术方案，在网络切片的场景中，目标网络切片组包括终端设备期望接入的网络切片，换言之，终端设备基于该终端设备期望接入的网络切片确定该目标网络切片组。其中，在该终端设备确定目标网络切片组的优先级信息之前，该终端设备可以预先基于该终端设备期望接入的一个或多个网络切片确定该目标网络切片组。换言之，该终端设备所确定的目标网络切片组包括该终端设备期望接入的网络切片组。从而，终端设备在基于该目标网络切片组的优先级进行小区重选至的目标小区之后，该终端设备可以在该目标小区进行通信，以获得该终端设备所期望接入的网络切片所对应的(业务关联的)网络服务。
在第一方面或第二方面的一种可能的实现方式中，终端设备期望接入的网络切片包括以下至少一项：允许的(Allowed)单网络切片选择辅助信息(single network slice selection assistance information，NSSAI)信元所指示的网络切片、请求的NSSAI(Requested NSSAI)信元所指示的网络切片、暂停的NSSAI(suspended NSSAI)信元所指示的网络切片或与移动发起流量(mobile originated traffic，MO traffic)业务相关的网络切片。
基于上述技术方案，终端设备可以在不同的场景中，基于上述多种方式所指示的网络切片(记为目标网络切片)确定出该终端设备期望接入的网络切片。例如，对于处于空闲(Idle)态的终端设备而言，该终端设备可以将允许的NSSAI所指示的一个或多个网络切片确定为终端设备期望接入的网络切片；又如，对于处于非激活(Inactive)态的终端设备而言，该终端设备可以将暂停的NSSAI所指示的一个或多个网络切片确定为终端设备期望接入的网络切片。从而，提供多种实现方式以实现在不同场景下的通信。
在第一方面或第二方面的一种可能的实现方式中，目标网络切片组包括默认网络切片(或称为默认NSSAI所对应的网络切片)。
或者，目标网络切片组包括默认网络切片组，该默认网络切片组包括一个或多个默认网络切片。
在第一方面或第二方面的一种可能的实现方式中，目标网络切片组(至少)由网络切片与网络切片组之间的对应关系所确定，网络切片与网络切片组之间的对应关系(为便于后文引用，记为第一对应关系)在终端设备当前所处的第一区域无效(或不适用、不适配等)时，该目标网络切片组包括默认网络切片，其中，第一对应关系为网络切片与网络切片组之间的对应关系，第一区域包括注册区域(registration area，RA)、跟踪区域(tracking area，TA)或公共陆地移动网(public land mobile network，PLMN)区域。
可选的，网络切片与网络切片组之间的对应关系(或称映射关系，关联关系等)具体指示网络切片所归属的网络切片组，或指示网络切片组所包含的网络切片。
基于上述技术方案，由于不同区域(RA、TA或PLMN区域)所对应的网络切片组与网络切片之间的对应关系有可能不同，因此，该终端设备可以在该第一对应关系在该终端设备当前所处的第一区域中无效时，该终端设备确定目标网络切片组包括默认网络切片。换言之，该终端设备将包含有默认网络切片的默认网络切片组确定为该目标网络切片组。以使得终端设备基于第一区域中的网络设备所提供的默认网络切片组关联的小区频点进行小区重选，以避免小区重选失败。
可选的，默认网络切片组包括一个或多个默认网络切片。
基于上述技术方案，该终端设备可以在该第一对应关系在该终端设备所处的第一区域中无效时，该终端设备确定目标网络切片组包括默认网络切片组。其中，该默认网络切片组所包含的网络切片具体可以为一个或多个(由运营商定义的)默认网络切片(Default Slice)。
可选的，第一对应关系可以为该终端设备在最近一次接收来自网络设备指示的网络切片与网络切片组之间的对应关系。
可选的，该第一对应关系关联于第二区域，其中，第二区域可以包括RA、TA或PLMN区域。换言之，不同的(RA、TA或PLMN)区域有可能关联于不同的对应关系。换言之，在不同的(RA、TA或PLMN)区域中，网络切片和网络切片组之间的对应关系有可能不同。其中，目标网络切片组由第一对应关系所确定也可以包括：终端设备由第一对应关系确定该目标网络切片组。
示例性的，该终端设备接收系统消息，该系统消息可以包括用于指示终端设备当前所 处的第一区域的信息。在该系统消息所指示的第一区域与第一对应关系关联的第二区域相同时，该终端设备确定第一对应关系有效；在该系统消息所指示的第一区域与第一对应关系关联的第二区域不同时，该终端设备确定第一对应关系无效。
基于上述技术方案，该目标网络切片组中的每一个网络切片组包括该终端设备期望接入的一个或多个目标网络切片，终端设备在基于该目标网络切片组的优先级进行小区重选至的目标小区之后，该终端设备可以在该目标小区进行通信，以获得该终端设备所期望接入的网络切片所对应的(业务关联的)网络服务。
此外，终端设备基于网络切片组的优先级信息以确定目标小区的小区重选方式中，该终端设备可以基于目标网络切片组直接确定包括多个目标网络切片的目标小区，使得该终端设备能够更快捷地在支持多个目标网络切片通信的目标小区中获得更多种类的网络服务，以提升用户体验。
在第一方面或第二方面的一种可能的实现方式中，该终端设备确定目标网络切片组的优先级信息包括：该终端设备接收来自网络设备的优先级信息。换言之，该终端设备基于网络设备的指示确定该优先级信息。
可选的，该优先级信息承载于第一指示信息，该第一指示信息至少用于指示该优先级信息。
可选的，该第一指示信息还用于指示目标网络切片组之外的其他网络切片组的优先级。
基于上述技术方案，终端设备可以基于网络设备发送的信息确定该目标网络切片组的优先级信息。使得终端设备能够基于网络设备的指示(例如第一指示信息)以明确网络设备所配置的网络切片组，提升后续小区重选的成功率。
在第一方面或第二方面的一种可能的实现方式中，该终端设备确定目标网络切片组的优先级信息包括：该终端设备基于历史使用(或称历史接入)的网络切片信息确定该优先级信息。
可选的，历史使用的网络切片信息包括历史使用的网络切片的次数、历史使用的网络切片的频率等。
基于上述技术方案，终端设备可以基于该终端设备历史使用的网络切片信息确定该目标网络切片组的优先级信息。其中，由于历史使用的网络切片信息可以在一定程度上反映出该终端设备的特定信息(例如业务偏好信息、持续时长等)，使得该终端设备基于历史接入的网络切片信息所确定的优先级信息进行小区重选，所确定的目标小区能够提供该终端设备的特定信息所对应的网络服务，以提升用户体验。
在第一方面或第二方面的一种可能的实现方式中，该优先级信息由目标网络切片组中每一个网络切片组所包含的网络切片的数量和/或优先级信息确定。
或者，该终端设备确定目标网络切片组的优先级信息包括：该终端设备基于来自网络设备的第一信息确定该优先级信息，其中，该第一信息用于指示该目标网络切片组中每一个网络切片组所包含的网络切片的数量和/或优先级信息。
可选的，优先级信息包括优先级等级、优先级数值等。
基于上述技术方案，终端设备可以基于该目标网络切片组中每一个网络切片组所包含 的网络切片的数量和/或优先级信息确定该目标网络切片组的优先级信息。换言之，终端设备基于目标网络切片组所包含的网络切片的信息(例如优先级信息、数量信息等)以确定该优先级信息。其中，该第一信息为基于网络设备的指示所确定的，使得终端设备能够基于网络设备的指示(即第一信息)以明确网络设备所配置的网络切片组所包含的网络切片的信息，提升后续小区重选的成功率。
可选的，该第一信息包括以下至少一项：
该目标网络切片组中，每一个网络切片组所包含的网络切片的优先级高低信息；或，
该目标网络切片组中，每一个网络切片组所包含的网络切片的优先级数值；或，
该目标网络切片组中，每一个网络切片组所包含的网络切片的数量；或，
该目标网络切片组中，每一个网络切片组所包含的目标网络切片的优先级高低信息；或，
该目标网络切片组中，每一个网络切片组所包含的目标网络切片的优先级数值；或，
该目标网络切片组中，每一个网络切片组所包含的目标网络切片的数量。
基于上述技术方案，第一信息具体可以为上述一项或多项信息的组合，在提升终端设备的实现灵活性的同时，可以从多个维度(例如优先级信息的维度、数量信息的维度等)的信息提供优先级信息的确定依据。
在第一方面或第二方面的一种可能的实现方式中，该终端设备基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选包括：该终端设备基于目标小区频点进行小区重选，其中，该目标小区频点为该优先级信息所指示的目标网络切片组中，优先级最高的网络切片组所关联的一个或多个小区频点。
可选的，该终端设备基于目标小区频点进行小区重选的过程中，若该终端设备基于该目标小区频点进行扫频后无法找到符合驻留条件的邻区，则该终端设备基于目标网络切片组中优先级次高(或者其他优先级)的网络切片组所关联的一个或多个小区频点进行小区重选。
基于上述技术方案，该终端设备基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选的过程中，该终端设备具体可以在优先级最高的网络切片组所关联的一个或多个小区频点进行小区重选，以提高该终端设备执行小区重选的成功率。
可选地，该终端设备基于目标小区频点进行小区重选包括：该终端设备基于目标小区频点对应的频点优先级进行小区重选。
在第一方面或第二方面的一种可能的实现方式中，该方法还包括：该终端设备接收来自该网络设备的指示信息，该指示信息用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；其中，该第一小区频点包括以下至少一项：
网络切片集合所包含的一个或多个网络切片所关联的小区频点，该网络切片集合包括该终端设备期望接入的网络切片；或，
未与网络切片关联的小区频点；或，
网络切片组集合所包含的一个或多个网络切片组所关联的小区频点，该网络切片组集 合包括该终端设备期望接入的网络切片对应的网络切片组；或，
未与网络切片组关联的小区频点；或，
该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点。
基于上述技术方案，终端设备还可以接收该指示信息，使得该终端设备在基于目标小区频点进行小区重选的过程中，可以基于该指示信息明确在基于该目标小区频点进行小区重选失败之后，该终端设备可以基于第一小区频点对应的频点优先级进行小区重选。以使得终端设备在基于该目标小区频点进行小区重选失败的情况下，可以基于指示信息进一步执行小区重选，以进一步提高该终端设备执行小区重选的成功率。
本申请中，未与网络切片关联的小区频点，也可以表述为：未基于网络切片所确定的小区频点或无需基于网络切片所确定的小区频点。类似地，未与网络切片组关联的小区频点，也可以表述为：未基于网络切片组所确定的小区频点或无需基于网络切片组所确定的小区频点。
本申请中，网络切片集合可以包括一个或多个网络切片，其中，每一个网络切片可以关联于一个或多个小区频点；此外，在网络切片集合包括多个网络切片的情况下，使得终端设备可以基于该多个网络切片确定多个小区频点，以期提高该终端设备基于该网络切片集合所关联的小区频点执行小区重选的成功率。类似地，网络切片组集合可以包括一个或多个网络切片组，其中，每一个网络切片组可以关联于一个或多个小区频点；此外，在网络切片组集合包括多个网络切片组的情况下，使得终端设备可以基于该多个网络切片组确定多个小区频点组，以期提高该终端设备基于该网络切片组组集合所关联的小区频点执行小区重选的成功率。
可选地，网络切片集合除了包括该终端设备期望接入的网络切片之外，还可以包括其它的网络切片，此处不做限定。类似地，网络切片组集合除了包括该终端设备期望接入的网络切片对应的网络切片组之外，还可以包括其它的网络切片组，此处不做限定。
此外，该网络切片集合所包含的网络切片标识(例如网络切片索引、网络切片名称等)可以通过列表的形式实现，该列表可以称为切片列表(Slice List)，或者通过其它的形式实现，例如数学关系式、位图等或者其它的形式，此处不做限定。类似地，该网络切片组集合中所包含的网络切片组标识(例如网络切片组索引、网络切片组名称等)可以通过列表的形式实现，该列表可以称为切片组列表(Slice Group List)，或者通过其它的形式实现，例如数学关系式、位图等或者其它的形式，此处不做限定。
可选地，在第一小区频点不包括该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点(为便于描述，记为第二小区频点)的情况下，该终端设备基于目标小区频点进行小区重选包括：
该终端设备确定基于该目标小区频点进行小区重选失败之后，该终端设备基于第二小区频点进行小区重选；
该终端设备确定基于该第二小区频点进行小区重选失败之后，该终端设备基于该第一小区频点进行小区重选。
在第一方面或第二方面的一种可能的实现方式中，该指示信息包括以下至少一项：基于该第一小区频点进行小区重选的次数、基于该第一小区频点进行小区重选的时长、基于该第一小区频点进行小区重选的起始时刻或基于该第一小区频点进行小区重选的终止时刻。
基于上述技术方案，终端设备所接收的指示信息可以包括上述“至少一项”小区重选的实现方式，以使得终端设备终端设备在基于该目标小区频点进行小区重选失败的情况下，可以基于指示信息进一步基于该指示信息明确基于第一小区频点执行小区重选的实现方式，以进一步提高该终端设备执行小区重选的成功率。
本申请第三方面提供了一种小区重选的方法，该方法由网络设备执行，或者，该方法由网络设备中的部分组件(例如处理器、芯片或芯片系统等)执行，或者该方法还可以由能实现全部或部分网络设备功能的逻辑模块或软件实现。在第一方面及其可能的实现方式中，以该小区重选的方法由网络设备执行为例进行描述。在该方法中，网络设备确定第一指示信息，该第一指示信息用于指示目标网络切片组的优先级信息，该优先级信息用于指示该目标网络切片组的优先级；该网络设备向终端设备发送该第一指示信息。
基于上述技术方案，网络设备所发送的第一指示信息用于指示目标网络切片组的优先级，以使得终端设备基于该第一指示信息所确定的目标网络切片组所关联的小区频点进行小区重选。其中，在网络切片的场景中，终端设备在小区重选的过程中所使用的小区频点基于网络切片组的粒度而配置的情况下，终端设备基于该第一指示信息所确定的该目标网络切片组所关联的小区频点进行小区重选的方案，使得终端设备以网络切片组为小区重选的粒度进行小区重选。从而，该小区重选的方案适配于基于网络切片组进行通信的场景的同时，也能提高小区重选的成功率，提升通信效率。
此外，终端设备可以基于网络设备发送的第一指示信息确定该目标网络切片组的优先级信息的实现方式中，也可以使得终端设备能够基于网络设备的指示(即第一指示信息)以明确网络设备所配置的网络切片组，提升后续小区重选的成功率。
可选的，该第一指示信息还用于指示目标网络切片组之外的其他网络切片组的优先级。
在第三方面的一种可能的实现方式中，该方法还包括：该网络设备向该终端设备发送指示信息，该指示信息用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；其中，该第一小区频点包括以下至少一项：
网络切片集合所包含的一个或多个网络切片所关联的小区频点，该网络切片集合包括该终端设备期望接入的网络切片；或，
未与网络切片关联的小区频点；或，
网络切片组集合所包含的一个或多个网络切片组所关联的小区频点，该网络切片组集合包括该终端设备期望接入的网络切片对应的网络切片组；或，
未与网络切片组关联的小区频点；或，
该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点。
可选地，网络切片集合除了包括该终端设备期望接入的网络切片之外，还可以包括其它的网络切片，此处不做限定。类似地，网络切片组集合除了包括该终端设备期望接入的 网络切片对应的网络切片组之外，还可以包括其它的网络切片组，此处不做限定。
此外，该网络切片集合所包含的网络切片标识(例如网络切片索引、网络切片名称等)可以通过列表的形式实现，该列表可以称为切片列表(Slice List)，或者通过其它的形式实现，例如数学关系式、位图等或者其它的形式，此处不做限定。类似地，该网络切片组集合中所包含的网络切片组标识(例如网络切片组索引、网络切片组名称等)可以通过列表的形式实现，该列表可以称为切片组列表(Slice Group List)，或者通过其它的形式实现，例如数学关系式、位图等或者其它的形式，此处不做限定。
基于上述技术方案，网络设备还可以向终端设备发送该指示信息，使得该终端设备在基于目标小区频点进行小区重选的过程中，可以基于该指示信息明确在基于该目标小区频点进行小区重选失败之后，该终端设备可以基于第一小区频点对应的频点优先级进行小区重选。以使得终端设备在基于该目标小区频点进行小区重选失败的情况下，可以基于指示信息进一步执行小区重选，以进一步提高该终端设备执行小区重选的成功率。
在第三方面的一种可能的实现方式中，该指示信息包括以下至少一项：基于该第一小区频点进行小区重选的次数、基于该第一小区频点进行小区重选的时长、基于该第一小区频点进行小区重选的起始时刻或基于该第一小区频点进行小区重选的终止时刻。
基于上述技术方案，网络设备所发送的指示信息可以包括上述“至少一项”小区重选的实现方式，以使得终端设备在基于该目标小区频点进行小区重选失败的情况下，可以基于指示信息进一步基于该指示信息明确基于第一小区频点执行小区重选的实现方式，以进一步提高该终端设备执行小区重选的成功率。
本申请第四方面提供了一种通信装置，该装置可以实现上述第一方面或第一方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或模块。该装置包括的单元或模块可以通过软件和/或硬件方式实现。例如，该装置可以为终端设备，或者，该装置可以为终端设备中的组件(例如处理器、芯片或芯片系统等)，或者该装置还可以为能实现全部或部分终端设备功能的逻辑模块或软件。
其中，该通信装置至少包括处理单元；
该处理单元，用于确定目标网络切片组的优先级信息，该优先级信息用于指示该目标网络切片组的优先级；
该处理单元，用于基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选。
本申请第五方面提供了一种通信装置，该装置可以实现上述第二方面或第二方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或模块。该装置包括的单元或模块可以通过软件和/或硬件方式实现。例如，该装置可以为终端设备，或者，该装置可以为终端设备中的组件(例如处理器、芯片或芯片系统等)，或者该装置还可以为能实现全部或部分终端设备功能的逻辑模块或软件。
其中，该通信装置至少包括处理单元；
该处理单元，用于确定目标网络切片组所关联的小区频点；
该处理单元，用于基于该目标网络切片组所关联的小区频点进行小区重选。
可选的，在第五方面的一种可能的实现方式中，目标网络切片组所包含的网络切片组的数量为1。
可选的，在第五方面的一种可能的实现方式中，目标网络切片组所包含的网络切片组的数量为多个。该终端设备基于该目标网络切片组所关联的小区频点进行小区重选的过程可以包括，该终端设备确定目标网络切片组的优先级信息；其中，该优先级信息用于指示目标网络切片组的优先级；该终端设备基于该优先级信息所确定的目标网络切片组所关联的小区频点进行小区重选。
在第四方面或第五方面的一种可能的实现方式中，该目标网络切片组包括终端设备期望接入的网络切片。
在第四方面或第五方面的一种可能的实现方式中，该终端设备期望接入的网络切片包括以下至少一项：允许的NSSAI信元所指示的网络切片、请求的NSSAI信元所指示的网络切片、暂停的NSSAI信元所指示的网络切片或与移动发起流量业务相关的网络切片。
在第四方面或第五方面的一种可能的实现方式中，目标网络切片组包括默认网络切片。
在第四方面或第五方面的一种可能的实现方式中，目标网络切片组由网络切片与网络切片组之间的对应关系所确定，该网络切片与网络切片组之间的对应关系在终端设备当前所处的第一区域无效时，该目标网络切片组包括默认网络切片，其中，第一区域包括注册区域(registration area，RA)、跟踪区域(tracking area，TA)或公共陆地移动网(public land mobile network，PLMN)区域。
在第四方面或第五方面的一种可能的实现方式中，该装置还包括收发单元；该处理单元，用于确定目标网络切片组的优先级信息包括：
该处理单元，用于通过该收发单元接收来自网络设备的该优先级信息。
在第四方面或第五方面的一种可能的实现方式中，该处理单元，用于确定目标网络切片组的优先级信息包括：
该处理单元，用于基于历史使用的网络切片信息确定该优先级信息。
在第四方面或第五方面的一种可能的实现方式中，该优先级信息由目标网络切片组中的每一个网络切片组所包含的网络切片的数量和/或优先级信息确定。
在第四方面或第五方面的一种可能的实现方式中，该处理单元，用于基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选包括：
该处理单元，用于基于目标小区频点进行小区重选，其中，该目标小区频点为该目标网络切片组中，优先级最高的网络切片组所关联的一个或多个小区频点。
在第四方面或第五方面的一种可能的实现方式中，该收发单元，还用于接收指示信息，该指示信息用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；其中，该第一小区频点包括以下至少一项：
网络切片集合所包含的一个或多个网络切片所关联的小区频点，该网络切片集合包括该终端设备期望接入的网络切片；或，
未与网络切片关联的小区频点；或，
网络切片组集合所包含的一个或多个网络切片组所关联的小区频点，该网络切片组集合包括该终端设备期望接入的网络切片对应的网络切片组；或，
未与网络切片组关联的小区频点；或，
该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点。
在第四方面或第五方面的一种可能的实现方式中，该指示信息包括以下至少一项：基于该第一小区频点进行小区重选的次数、基于该第一小区频点进行小区重选的时长、基于该第一小区频点进行小区重选的起始时刻或基于该第一小区频点进行小区重选的终止时刻。
本申请第六方面提供了一种通信装置，该装置可以实现上述第三方面或第三方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或模块。该装置包括的单元或模块可以通过软件和/或硬件方式实现。例如，该装置可以为网络设备，或者，该装置可以为网络设备中的组件(例如处理器、芯片或芯片系统等)，或者该装置还可以为能实现全部或部分网络设备功能的逻辑模块或软件。
其中，该通信装置包括处理单元和收发单元；
该处理单元，用于确定目标网络切片组的优先级信息，该优先级信息用于指示该目标网络切片组的优先级；
该收发单元，用于发送该优先级信息。
在第六方面的一种可能的实现方式中，该收发单元，还用于发送指示信息，该指示信息用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；其中，该第一小区频点包括以下至少一项：
网络切片集合所包含的一个或多个网络切片所关联的小区频点，该网络切片集合包括该终端设备期望接入的网络切片；或，
未与网络切片关联的小区频点；或，
网络切片组集合所包含的一个或多个网络切片组所关联的小区频点，该网络切片组集合包括该终端设备期望接入的网络切片对应的网络切片组；或，
未与网络切片组关联的小区频点；或，
该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点。
在第六方面的一种可能的实现方式中，该指示信息包括以下至少一项：基于该第一小区频点进行小区重选的次数、基于该第一小区频点进行小区重选的时长、基于该第一小区频点进行小区重选的起始时刻或基于该第一小区频点进行小区重选的终止时刻。
本申请实施例第七方面提供了一种通信装置，包括至少一个处理器，该至少一个处理器与存储器耦合；该存储器用于存储程序或指令；该至少一个处理器用于执行该程序或指令，以使该装置实现前述第一方面或第一方面任意一种可能的实现方式所述的方法，或者，以使该装置实现前述第二方面或第二方面任意一种可能的实现方式所述的方法，或者，以使该装置实现前述第三方面或第三方面任意一种可能的实现方式所述的方法。
本申请实施例第八方面提供一种存储一个或多个计算机执行指令的计算机可读存储介 质，当计算机执行指令被处理器执行时，该处理器执行如上述第一方面或第一方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第二方面或第二方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第三方面或第三方面任意一种可能的实现方式所述的方法。
本申请实施例第九方面提供一种存储一个或多个计算机的计算机程序产品(或称计算机程序)，当计算机程序产品被该处理器执行时，该处理器执行如上述第一方面或第一方面任意一种可能实现方式的方法，或者，该处理器执行如上述第二方面或第二方面任意一种可能的实现方式所述的方法，或者，该处理器执行如上述第三方面或第三方面任意一种可能的实现方式所述的方法。
本申请实施例第十方面提供了一种芯片系统，该芯片系统包括至少一个处理器，用于支持通信装置实现上述第一方面或第一方面任意一种可能的实现方式中所涉及的功能；或者，用于支持通信装置实现上述第二方面或第二方面任意一种可能的实现方式中所涉及的功能；或者，用于支持通信装置实现上述第三方面或第三方面任意一种可能的实现方式中所涉及的功能。
在一种可能的设计中，该芯片系统还可以包括存储器，用于保存该通信装置必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件。可选的，该芯片系统还包括接口电路，该接口电路为该至少一个处理器提供程序指令和/或数据。
本申请实施例第十一方面提供了一种通信系统，该通信系统包括上述第四方面的通信装置和第六方面的通信装置，和/或，该通信系统包括上述第五方面的通信装置和第六方面的通信装置，和或，该通信系统包括上述第七方面的通信装置。
其中，第三方面至第九方面中任一种设计方式所带来的技术效果可参见上述第一方面或第二方面中不同实现方式所带来的技术效果，在此不再赘述。
从以上技术方案可以看出，终端设备在确定用于指示该目标网络切片组的优先级信息之后，该终端设备在执行小区重选的过程中，该终端设备基于该优先级信息所确定的目标网络切片组所关联的小区频点进行小区重选。换言之，该终端设备基于目标网络切片组的优先级所确定的该目标网络切片组所关联的小区频点进行小区重选。其中，在网络切片的场景中，终端设备在小区重选的过程中所使用的小区频点基于网络切片组的粒度而配置的情况下，终端设备基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选的方案，使得终端设备以网络切片组为小区重选的粒度进行小区重选。从而，该小区重选的方案适配于基于网络切片组进行通信的场景的同时，也能提高小区重选的成功率，提升通信效率。
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图15b为本申请提供的小区重选的方法的另一个示意图；
图16为本申请提供的通信装置的一个示意图；
图17为本申请提供的通信装置的另一个示意图；
图18为本申请提供的通信装置的另一个示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
首先，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
(1)终端设备：可以是能够接收网络设备调度和指示信息的无线终端设备，无线终端设备可以是指向用户提供语音和/或数据连通性的设备，或具有无线连接功能的手持式设备，或连接到无线调制解调器的其他处理设备。
终端设备可以经无线接入网(radio access network，RAN)与一个或多个核心网或者互联网进行通信，终端设备可以是移动终端设备，如移动电话(或称为“蜂窝”电话，手机(mobile phone))、计算机和数据卡，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语音和/或数据。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、平板电脑(Pad)、带无线收发功能的电脑等设备。无线终端设备也可以称为系统、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile  station)、移动台(mobile station，MS)、远程站(remote station)、接入点(access point，AP)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户站(subscriber station，SS)、用户端设备(customer premises equipment，CPE)、终端(terminal)、用户设备(user equipment，UE)、移动终端(mobile terminal，MT)等。终端设备也可以是可穿戴设备以及下一代通信系统，例如，5G通信系统中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的终端设备等。
(2)网络设备：可以是无线网络中的设备，例如网络设备可以为将终端设备接入到无线网络的无线接入网(radio access network，RAN)节点(或设备)，又可以称为基站。目前，一些RAN设备的举例为：5G通信系统中的新一代基站(generation Node B，gNodeB)、传输接收点(transmission reception point，TRP)、演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved Node B，或home Node B，HNB)、基带单元(base band unit，BBU)，或无线保真(wireless fidelity，Wi-Fi)接入点(access point，AP)等。另外，在一种网络结构中，网络设备可以包括集中单元(centralized unit，CU)节点、或分布单元(distributed unit，DU)节点、或包括CU节点和DU节点的RAN设备。
其中，网络设备能够向终端设备发送配置信息(例如承载于调度消息和/或指示消息中)，终端设备进一步根据该配置信息进行网络配置，使得网络设备与终端设备之间的网络配置对齐；或者，通过预设于网络设备的网络配置以及预设于终端设备的网络配置，使得网络设备与终端设备之间的网络配置对齐。具体来说，“对齐”是指网络设备与终端设备之间存在交互消息时，两者对于交互消息收发的载波频率、交互消息类型的确定、交互消息中所承载的字段信息的含义、或者是交互消息的其它配置的理解一致。
此外，在其它可能的情况下，网络设备可以是其它为终端设备提供无线通信功能的装置。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。为方便描述，本申请实施例并不限定。
网络设备还可以包括核心网设备，核心网设备例如包括4G网络中的移动性管理实体(mobility management entity，MME)，归属用户服务器(home subscriber server，HSS)，服务网关(serving gateway，S-GW)，策略和计费规则功能(policy and charging rules function，PCRF)，公共数据网网关(public data network gateway，PDN gateway，P-GW)；5G网络中的访问和移动管理功能(access and mobility management function，AMF)、用户面功能(user plane function，UPF)或会话管理功能(session management function，SMF)等网元。此外，该核心网设备还可以包括5G网络以及5G网络的下一代网络中的其他核心网设备。
本申请实施例中，用于实现网络设备的功能的装置可以是网络设备，也可以是能够支持网络设备实现该功能的装置，例如芯片系统，该装置可以被安装在网络设备中。在本申 请实施例提供的技术方案中，以用于实现网络设备的功能的装置是网络设备为例，描述本申请实施例提供的技术方案。
(3)配置与预配置：在本申请中，会同时用到配置与预配置。其中，配置是指基站/服务器通过消息或信令将一些参数的配置信息或参数的取值发送给终端，以便终端根据这些取值或信息来确定通信的参数或传输时的资源。预配置与配置类似，可以是基站/服务器预先与终端设备协商好的参数信息或参数值，也可以是标准协议规定的基站/服务器或终端设备采用的参数信息或参数值，还可以是预先存储在基站/服务器或终端设备的参数信息或参数值。本申请对此不做限定。
进一步地，这些取值和参数，是可以变化或更新的。
(4)本申请实施例中的术语“系统”和“网络”可被互换使用。“目标”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A、同时存在A和B、单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如“A，B和C中的目标”包括A，B，C，AB，AC，BC或ABC。以及，除非有特别说明，本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的顺序、时序、优先级或者重要程度。
本申请中，除特殊说明外，各个实施例之间相同或相似的部分可以互相参考。在本申请中各个实施例、以及各实施例中的各个实施方式/实施方法/实现方法中，如果没有特殊说明以及逻辑冲突，不同的实施例之间、以及各实施例中的各个实施方式/实施方法/实现方法之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例、以及各实施例中的各个实施方式/实施方法/实现方法中的技术特征根据其内在的逻辑关系可以组合形成新的实施例、实施方式、实施方法、或实现方法。以下所述的本申请实施方式并不构成对本申请保护范围的限定。
本申请可以应用于长期演进(long term evolution，LTE)系统、新无线(new radio，NR)系统，或者是其它的通信系统，其中，该通信系统中包括网络设备和终端设备，网络设备作为配置信息发送实体，终端设备作为配置信息接收实体。具体来说，该通信系统中存在实体向另一实体发送配置信息，并向另一实体发送数据、或接收另一实体发送的数据；另一个实体接收配置信息，并根据配置信息向配置信息发送实体发送数据、或接收配置信息发送实体发送的数据。
请参阅图1，为本申请中通信系统的一种示意图。图1中，示例性的示出了一个网络设备和6个终端设备，6个终端设备分别为终端设备1、终端设备2、终端设备3、终端设备4、终端设备5以及终端设备6等。在图1所示的示例中，是以终端设备1为智能茶杯，终端设备2为智能空调，终端设备3为智能加油机，终端设备4为交通工具，终端设备5为手机，终端设备6为打印机进行举例说明的。
如图1所示，配置信息发送实体可以为网络设备，其中，网络设备以基站(Base Station)、各个终端设备为UE为例进行说明，配置信息接收实体可以为UE1-UE6，此时，基站和UE1-UE6 组成一个通信系统，在该通信系统中，UE1-UE6可以发送上行数据给网络设备，网络设备需要接收UE1-UE6发送的上行数据。同时，网络设备可以向UE1-UE6发送配置信息。
此外，在图1中，UE4-UE6也可以组成一个通信系统，此时，配置信息发送实体和接收实体可以都是UE，其中，UE5作为网络设备，即配置信息发送实体；UE4和UE6作为终端设备，即配置信息接收实体。例如车联网系统中，UE5分别向UE4和UE6发送配置信息，并且接收UE4和UE6发送的上行数据；相应的，UE4和UE6接收UE5发送的配置信息，并向UE5发送上行数据。
上述内容简要阐述了本申请实施例的系统架构，为更好地理解本申请实施例的技术方案，下面将介绍与本申请实施例相关的几个内容。
一、网络切片
随着移动通信技术的发展，各类新业务以及应用场景不断涌现，这些业务对网络功能、连接性能及安全性等方面的需求存在很大的差别。如果利用单一网络去承载这些业务，将很难同时满足高带宽、低时延、高可靠性等需求。为此，5G网络通过网络切片(Network Slicing)为用户提供定制化的网络服务，通过对网络资源的灵活分配、按需组网。
一种实现方式中，可以在同一套物理设施(physical infrastructure)上虚拟出多个具有不同特点且相互隔离的逻辑子网，来针对性地为用户提供服务。例如，不同的逻辑子网所提供的服务可以包括增强移动宽带(enhanced mobile broadband，eMBB)、超可靠低延迟通信(ultra reliable and low-latency communication，URLLC)、海量物联网通信(massive machine-type communications，mMTC)等。
其中，不同逻辑子网由“单网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)”来标识和区分。为便于描述，后文中将一个或多个S-NSSAI记为NSSAI。每一个S-NSSAI可包括下列内容：
1、切片/服务类型(slice/service type，SST)，指向切片特定的特征和业务类型。
2、切片区分符(slice differentiator，SD)，作为切片/服务类型的补充，可进一步区分满足相同切片/服务类型的多个网络切片实例，为可选项。
此外，针对NSSAI，具体有以下几种分类：
1、订阅的NSSAI(Subscribed NSSAI)：属于用户的订阅数据。
2、默认的NSSAI(Default NSSAI)：根据运营商的策略，用户的订阅的NSSAI中可能会一个或多个被设置为默认的NSSAI；如果UE在注册请求消息(Registration Request)没有携带允许的NSSAI(Allowed NSSAI)，则(如果默认的NSSAI存在的话)网络设备会使用默认的NSSAI来给UE提供服务。
3、请求的NSSAI(Requested NSSAI)：表示UE在注册请求消息(Registration Request)携带的配置的NSSAI(Configured NSSAI)或者Allowed NSSAI。
4、允许的NSSAI(Allowed NSSAI)：表示UE请求的NSSAI中，哪些NSSAI被网络设备允许了，网络设备会在注册接收消息(Registration Accept)的“Allowed NSSAI”信元(information element，IE)信元带给UE。
5、拒绝的NSSAI(Rejected NSSAI)：表示UE请求的NSSAI中，哪些NSSAI被网络设备拒绝了，网络设备会在注册接收消息(Registration Accept)的“Rejected NSSAI”IE带给UE。
6、配置的NSSAI(Configured NSSAI)：表示网络设备配置给UE使用的NSSAI，收到这个配置参数后UE就知道网络设备下有哪些NSSAI可用；网络设备会在注册接收消息(Registration Accept)的“Configured NSSAI”IE带给UE，如果注册后UE的配置有变化，则网络设备可通过配置更新命令(Configuration update command)通知UE更新；UE会在非易失存储空间保存每个网络设备给它配置的Configured NSSAI。一般地，每个PLMN最多只能配置一个Configured NSSAI。
二、小区重选
小区重选指UE在IDLE或INACTIVE态通过监测邻区和当前小区的信号质量以选择一个最好的小区提供服务信号的过程。小区重选基本分为如下3个过程：
1、根据测量启动标准，测量当前服务小区和邻区(包括同频，异频，异系统的小区)。一般地，异系统的小区指的是支持不同无线接入技术(radio access technology，RAT)的小区。
2、判别邻区信号是否符合重选标准。
3、符合则启动重选，接收新小区的系统消息块1(system information block 1，SIB1)，若无接入受限(比如运营商可能有一些预留小区或者对接入有限制的小区)等，则驻留新小区；不符合则仍然停留在当前服务小区。
可选的，邻区测量时需要考虑两个参数——小区重选优先级和当前驻留的小区的信号质量。邻区测量的过程可以简述为：优先级比当前小区高的，不管自己当前小区的质量有多好，UE都要无条件启动测量；优先级小于等于当前小区的，UE测量当前驻留的小区的信号质量并和网络设备下发的质量标准比较，如果好于这个标准就不测量邻区，如果比这个标准差，就测量邻区。小区重选测量后开始判别小区质量，并进行小区重选，相关依据包括服务小区信号质量、邻区信号质量、网络设备下发重选阈值和小区访问接入参数(小区是否禁止(barred)，是否预留(reserved)，接入等级等)。
由上述小区重选的过程可知，当前小区重选的方案并未考虑网络切片。而在基于网络切片进行通信的场景中，终端设备在小区重选的过程中所使用的小区频点有可能是基于网络切片(或网络切片组)的粒度而配置，在该情况下，终端设备如何进行小区重选，是一个亟待解决的技术问题。
为了解决上述问题，本申请提供了一种小区重选的方法及通信装置，用于在网络切片的场景中，终端设备在小区重选的过程中所使用的小区频点基于网络切片组的粒度而配置的情况下，终端设备基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选的方案，使得终端设备以网络切片组为小区重选的粒度进行小区重选。从而，该小区重选的方案适配于基于网络切片组进行通信的场景的同时，也能提高小区重选的成功率，提升通信效率。
请参阅图2，为本申请提供的小区重选的方法的一个示意图，该方法包括如下步骤。
S201.终端设备确定目标网络切片组的优先级信息。
本实施例中，终端设备在步骤S201中确定目标网络切片组的优先级信息，该优先级信息用于指示该目标网络切片组的优先级。其中，在目标网络切片组的每一个网络切片组中，包括一个或多个网络切片。
S202.终端设备基于优先级信息所确定的目标网络切片组所关联的小区频点进行小区重选。
需要说明的是，该终端设备基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选的过程，可以包括：该终端设备在处于空闲(IDLE)态或非激活(INACTIVE)态时，基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选。
在一种可能的实现方式中，在网络切片的场景中，终端设备可以基于网络切片的粒度进行小区重选。换言之，终端设备在小区重选的过程中所使用的小区频点基于网络切片的粒度而配置的情况下，该终端设备在确定特定的网络切片(包括一个或多个网络切片)之后，基于该特定的网络切片所关联的小区频点进行小区重选。
示例性的，终端设备基于网络切片的粒度进行小区重选，可以包括如下过程：
RAN可以广播针对切片的小区重选优先级，在不同场景下将终端设备期望能够接入的一个或多个网络切片可以称为目标网络切片(Intended Slice)(也可以为其他名称，此处不做限定)。其中，目标网络切片是不同情况下终端设备的接入层(access stratum，AS)从非接入层(non-access stratum，NAS)接收的网络切片相关信息。例如：
1、小区选择/重选:目标网络切片可以为允许的NSSAI/请求的NSSAI。
可选的，对于初始注册过程，终端设备可以申请新的NSSAI，即目标网络切片可以为Requested NSSAI(所指示的网络切片)。
可选的，对于处于空闲态的终端设备，目标网络切片可以为允许的NSSAI(所指示的网络切片)。
可选的，对于非激活态的终端设备，目标网络切片可以为暂停的NSSAI(所指示的网络切片)，即非激活态下暂停了终端设备上下文但已被激活的协议数据单元(protocol data unit，PDU)会话的相关的NSSAI(所指示的网络切片)。
2、移动发起流量(mobile originated traffic，MO traffic):目标网络切片是移动发起(mobile originated，MO)业务相关的NSSAI(所指示的网络切片)。
在另一种可能的实现方式中，在网络切片的场景中，终端设备可以基于网络切片组的粒度进行小区重选。换言之，终端设备在小区重选的过程中所使用的小区频点基于网络切片组的粒度而配置的情况下，该终端设备在确定特定的网络切片组(包括一个或多个网络切片组)之后，在该特定的网络切片组所关联的小区频点进行小区重选。
相比于上述基于网络切片的粒度进行小区重选的过程中，进一步提出了网络切片组(Slice Group)的概念，即将一个或多个网络切片按照一定规则进行分组标识。
其中，在基于网络切片组进行通信的场景中，网络设备将网络切片组关联的小区重选信息(例如小区频点信息)作为向终端设备发送的一个信息，并将网络切片组所包含的网 络切片的切片信息作为向终端设备发送的另一个信息，通过分开发送的方式在提升信息传输安全性的同时，降低广播开销。
示例性的，该分组规则可以包括如下实现方式：
方案一、基于SST。
方案二、基于统一接入控制(unified access control，UAC)接入类别(access category，AC)。
方案三、不同于方案一和方案二的其他网络切片分组机制。
具体地，NSSAI在特定区域内与特定的网络切片组标识(Slice Group ID)存在对应关系，即在特定区域内相同的网络切片组标识包含相同的NSSAI。这种对应关系的特点包括：
特点1、双向对应。例如，可以存在对应于网络切片组标识的相关NSSAI，也可以存在对应于NSSAI的网络切片组标识。
特点2、由核心网网元(core network，CN)经NAS提供给终端设备，可以基于特定终端设备(比如由允许的NSSAI/配置的NSSAI/订阅的NSSAI携带的SST)或者非特定终端设备(比如按照实际网络部署)实现。
一个实现示例如图3a所示，在图3a中示例通过允许的NSSAI/配置的NSSAI/订阅的NSSAI中携带的SST分组，比如eMBB类型和URLLC类型。其中，小区1(Cell 1)和小区2(Cell2)位于地理位置1(Geographical Location 1)，小区3(Cell 3)和小区4(Cell 4)位于地理位置2(Geographical Location 2)。
对于Cell 1，支持的接入频点记为频点2(Frequency 2，F2)，支持的网络切片包括网络切片1和网络切片2(Slice 1+Slice 2)。
对于Cell 2，支持的接入频点记为频点1(Frequency 1，F1)，支持的网络切片包括网络切片1(Slice 1)。
对于Cell 3，支持的接入频点记为F2，支持的网络切片包括Slice 1。
对于Cell 4，支持的接入频点记为F1，支持的网络切片包括Slice 1。
在图3a所示场景中，基于特定终端设备的Slice Group示例得到的对应关系可以表示为：
Slice Group#1＝{Slice 1_eMBB type services}。
Slice Group#2＝{Slice 2_URLLC type services}。
一个实现示例如图3b所示，在图3b中示例则是按照当前网络中网络切片的实际部署情况进行的简单分组对应。其中，Cell 0位于跟踪区0(tracking area 0，TA0)，Cell 1位于跟踪区1(tracking area 1，TA1)，Cell 2位于跟踪区2(tracking area 2，TA2)，Cell 3位于跟踪区3(tracking area 3，TA3)。
对于Cell 0，支持的接入频点记为频点0(Frequency 0，F0)，支持的网络切片包括网络切片1、网络切片2、网络切片3和网络切片4(Slice 1，2，3，4)。
对于Cell 1，支持的接入频点记为F1，支持的网络切片包括网络切片1和网络切片3(Slice 1，3)。
对于Cell 2，支持的接入频点记为F2，支持的网络切片包括网络切片1和网络切片2(Slice 1，2)。
对于Cell 3，支持的接入频点记为频点3(Frequency 3，F3)，支持的网络切片包括网络切片2、网络切片3和网络切片4(Slice 2，3，4)。
在图3b所示场景中，基于非特定终端设备的网络切片分组示例得到的对应关系可以表示为：
Slice Group#1＝{Slice 1，Slice 3}。
Slice Group#2＝{Slice 1，Slice 2}。
Slice Group#3＝{Slice 2，Slice 3，Slice 4}。
Slice Group#4＝{Slice 1，Slice 2，Slice 3，Slice 4}；
特点3、网络切片组与网络切片之间的对应关系对应的区域有效性的粒度可以是TA/RA或PLMN区域。
可选的，TA/RA粒度下为动态对应关系，由跟踪区更新(tracking area update，TAU)所确定。
可选的，PLMN粒度下为静态对应关系，由终端设备和运营商之间的签约信息确定。
当前主流选择是支持引入一种不同于方案一和方案二的网络切片分组机制(即方案三)来规避上述问题。这是因为基于SST的分组方式可能无法区分具有不同SD的网络切片，而基于UAC AC的分组方式又可能由于同一AC中的部分网络切片不被某些接入网设备支持从而会导致终端设备和接入网设备之间的失调。
终端设备可以通过图2所示实现过程，实现终端设备可以基于网络切片组的粒度进行小区重选。
具体地，终端设备在小区重选的过程中所使用的小区频点基于网络切片组的粒度而配置的情况下，在图2所示实现过程的步骤S201中，该终端设备确定目标网络切片组的优先级信息，该优先级信息用于指示该目标网络切片组的优先级。其中，在目标网络切片组的每一个网络切片组中，包括一个或多个网络切片。此后，在图2所示实现过程的步骤S202中，该终端设备基于优先级信息所确定的目标网络切片组所关联的小区频点进行小区重选。
可选的，目标网络切片组所包含的网络切片组的数量为1。作为一种可能的实现方式，在目标网络切片组所包含的网络切片组的数量为1时，终端设备在步骤S201可以不执行“确定目标网络切片组的优先级信息”的过程，而直接执行步骤S202中“基于该目标网络切片组所关联的小区频点进行小区重选”。换言之，在目标网络切片组所包含的网络切片组的数量为1时，该终端设备确定目标网络切片组所关联的小区频点，此后，该终端设备基于该目标网络切片组所关联的小区频点进行小区重选。
具体地，终端设备在执行小区重选的过程中，该终端设备基于目标网络切片组所关联的小区频点进行小区重选。其中，在网络切片的场景中，终端设备在小区重选的过程中所使用的小区频点基于网络切片组的粒度而配置的情况下，终端设备基于该目标网络切片组所关联的小区频点进行小区重选的方案，使得终端设备以网络切片组为小区重选的粒度进 行小区重选。从而，该小区重选的方案适配于基于网络切片组进行通信的场景的同时，也能提高小区重选的成功率，提升通信效率。
可选的，目标网络切片组中，每一个网络切片组所关联的小区频点数量可以为一个或多个。当某一个网络切片组所关联的小区频点数量为多个时，该终端设备可以基于网络设备配置的(或预配置的)频点(重选)优先级，分别在多个小区频点进行小区重选。
可选的，终端设备可以基于网络设备的广播消息确定目标网络切片组中每一个网络切片组所关联的小区频点。
可选的，终端设备可以基于网络设备的单播消息(例如RRC释放消息)确定目标网络切片组中每一个网络切片组所关联的小区频点。
在一种可能的实现方式中，该终端设备在步骤S202中基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选，包括：该终端设备基于目标小区频点进行小区重选，其中，该目标小区频点为该优先级信息所指示的目标网络切片组中，优先级最高的网络切片组所关联的一个或多个小区频点。具体地，该终端设备在步骤S202中基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选的过程中，该终端设备可以在优先级最高的网络切片组所关联的一个或多个小区频点进行小区重选，以提高该终端设备执行小区重选的成功率。
可选的，该终端设备在步骤S202中基于目标小区频点进行小区重选的过程中，若该终端设备基于该目标小区频点进行扫频后无法找到符合驻留条件的邻区，则该终端设备基于目标网络切片组中优先级次高(或者其他优先级)的网络切片组所关联的一个或多个小区频点进行小区重选。
可选地，该终端设备基于目标小区频点进行小区重选包括：该终端设备基于目标小区频点对应的频点优先级进行小区重选。类似地，目标小区频点所包含的小区频点数量可以为一个或多个，该终端设备可以基于网络设备配置的(或预配置的)频点(重选)优先级确定该目标小区频点，使得该终端设备在步骤S202中基于该目标小区频点对应的频点优先级执行小区重选。
进一步可选的，终端设备可以基于网络设备的广播消息确定目标网络切片组中，优先级最高的网络切片组所关联的一个或多个小区频点，即该目标小区频点；或者，终端设备可以基于网络设备的单播消息(例如RRC释放消息)确定目标网络切片组中，优先级最高的网络切片组所关联的一个或多个小区频点，即该目标小区频点。
在一种可能的实现方式中，该方法还包括：该终端设备接收来自该网络设备的指示信息，该指示信息用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；其中，该第一小区频点包括以下至少一项：
网络切片集合所包含的一个或多个网络切片所关联的小区频点，该网络切片集合包括该终端设备期望接入的网络切片；或，未与网络切片关联的小区频点；或，网络切片组集合所包含的一个或多个网络切片组所关联的小区频点，该网络切片组集合包括该终端设备期望接入的网络切片对应的网络切片组；或，未与网络切片组关联的小区频点；或，该优 先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点。
可选地，在第一小区频点不包括该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点(为便于描述，记为第二小区频点)的情况下，该终端设备在步骤S202中，基于目标小区频点进行小区重选包括：该终端设备确定基于该目标小区频点进行小区重选失败之后，该终端设备基于第二小区频点进行小区重选；该终端设备确定基于该第二小区频点进行小区重选失败之后，该终端设备基于该第一小区频点进行小区重选。
在该实现方式中，终端设备还可以接收该指示信息，使得该终端设备在步骤S202基于目标小区频点进行小区重选的过程中，可以基于该指示信息明确在基于该目标小区频点进行小区重选失败之后，该终端设备可以基于第一小区频点对应的频点优先级进行小区重选。以使得终端设备在基于该目标小区频点进行小区重选失败的情况下，可以基于指示信息进一步执行小区重选，以进一步提高该终端设备执行小区重选的成功率。
可选地，网络切片集合除了包括该终端设备期望接入的网络切片之外，还可以包括其它的网络切片，此处不做限定。示例性的，该网络切片集合所包含的网络切片可以包括Configured S-NSSAI和/或Allowed S-NSSAI，其中，Configured S-NSSAI或Allowed S-NSSAI的数量可以为一个或多个。此外，该网络切片集合所包含的网络切片标识(例如网络切片索引、网络切片名称等)可以通过列表的形式实现，该列表可以称为切片列表(Slice List)，或者通过其它的形式实现，例如数学关系式、位图等或者其它的形式，此处不做限定。
类似地，网络切片组集合除了包括该终端设备期望接入的网络切片对应的网络切片组之外，还可以包括其它的网络切片组，此处不做限定。示例性的，该网络切片组集合中的任意一个网络切片组所包含的网络切片可以包括Configured S-NSSAI和/或Allowed S-NSSAI，其中，Configured S-NSSAI或Allowed S-NSSAI的数量可以为一个或多个。此外，该网络切片组集合中所包含的网络切片组标识(例如网络切片组索引、网络切片组名称等)可以通过列表的形式实现，该列表可以称为切片组列表(Slice Group List)，或者通过其它的形式实现，例如数学关系式、位图等或者其它的形式，此处不做限定。
由上述第一小区频点的实现方式可知，该第一小区频点可以包括上述多种实现。为便于描述，下文中将第一小区频点包括上述“至少一项”中的数量即为k作为示例进行描述，其中，k大于或等于1。下面将基于k的取值的不同，对该指示信息的实现方式进一步描述。
一种可能的实现方式中，在k的取值等于1的情况下，则该第一小区频点可以包括上述“至少一项”中的五项中的一项。
另一种可能的实现方式中，在k的取值大于1的情况下，则该第一小区频点可以包括上述“至少一项”中的五项中的至少两项，该至少两项的执行顺序可以不做限定。
另一种可能的实现方式中，在k的取值大于1的情况下，则该第一小区频点可以包括上述“至少一项”中的五项中的至少两项，终端设备可以通过配置或预配置的方式确定该至少两项的执行顺序。
示例性的，该第一小区频点可以包括上述“至少一项”中的五项中的至少两项的情况下，终端设备可以通过配置或预配置的方式确定该至少两项的执行顺序的先后排序可以表示为：
该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点>网络切片组集合所包含的一个或多个网络切片组所关联的小区频点>网络切片集合所包含的一个或多个网络切片所关联的小区频点>未与网络切片组关联的小区频点＝未与网络切片关联的小区频点。
应理解，上述实现仅仅为示例，在实际应用中，终端设备可以通过配置或预配置的方式确定该至少两项的执行顺序还可以存在其它的实现方式，此处不做限定。
下面将结合更多的实现示例对指示信息的实现方式进一步描述。
一种实现方式中，该指示信息为取值可变的信元；换言之，通过取值可变的信元指示基于该目标小区频点进行小区重选失败之后，是否基于第一小区频点对应的频点优先级进行小区重选。
示例性的，该指示信息的取值为第一取值时，该指示信息用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；该指示信息的取值为第二取值时，该指示信息用于指示基于该目标小区频点进行小区重选失败之后，无需基于第一小区频点对应的频点优先级进行小区重选；其中，第一取值不同于第二取值。下面将结合更多的实现示例对第一取值和第二取值的实现过程进一步描述。
在该实现方式中，在k的取值等于1的情况下，即该第一小区频点可以包括上述“至少一项”中的五项中的一项。
可选地，该指示信息对应的取值可以包括布尔值，即通过该布尔值指示是否基于该五项中的一项频点对应的频点优先级进行小区重选。例如：该第一取值为“真(true)”且该第二取值为“假(false)”。或者，该指示信息对应的取值可以包括比特值，即通过该比特值指示是否基于该五项中的一项频点对应的频点优先级进行小区重选。例如，该指示信息所占比特数为“1”时，该第一取值为“1”且该第二取值为“0”；或，该第一取值为“0”且该第二取值为“1”。
在该实现方式中，在若k的取值大于1的情况下，即该第一小区频点可以包括上述“至少一项”中的五项中的至少两项。
可选地，该指示信息对应的取值可以包括一个布尔值，即通过一个布尔值指示是否基于该至少两项小区频点对应的频点优先级进行小区重选。或者，该指示信息对应的取值可以包括一个比特值，即通过一个比特值指示是否基于该至少两项小区频点对应的频点优先级进行小区重选。
可选地，该指示信息对应的取值可以包括至少两个布尔值，即通过至少两个布尔值分别指示是否基于该至少两项小区频点对应的频点优先级进行小区重选。或者，该指示信息对应的取值可以包括至少两个比特值，即通过至少两个比特值分别指示是否基于该至少两项小区频点对应的频点优先级进行小区重选。
另一种实现方式中，该指示信息为可选信元；换言之，通过取值该可选信元指示基于该目标小区频点进行小区重选失败之后，是否基于第一小区频点对应的频点优先级进行小区重选。
示例性的，网络设备所发送的消息中包括该指示信息时，指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；网络设备所发送的消息中未包括该指示信息时，指示基于该目标小区频点进行小区重选失败之后，无需基于第一小区频点对应的频点优先级进行小区重选。
应理解，网络设备所发送的消息可以包括广播消息、RRC消息、MAC CE消息或DCI消息等，或者是其他的消息，此处不做限定。
在该实现方式中，作为一种可能的实现，该指示信息包括以下至少一项：基于该第一小区频点进行小区重选的次数、基于该第一小区频点进行小区重选的时长、基于该第一小区频点进行小区重选的起始时刻或基于该第一小区频点进行小区重选的终止时刻。为便于描述，下文中将此处“至少一项”所包含的项数记为P，P大于或等于1。
具体地，终端设备所接收的指示信息可以包括上述“P项”中的至少一项小区的重选方式，以使得终端设备终端设备在基于该目标小区频点进行小区重选失败的情况下，可以基于指示信息进一步基于该指示信息明确基于第一小区频点执行小区重选的重选方式，以进一步提高该终端设备执行小区重选的成功率。
在该实现方式中，在k的取值等于1的情况下，即该第一小区频点可以包括上述“至少一项”中的五项中的一项。换言之，该指示信息可以通过该P项中的至少一项指示基于该五项中的一项频点对应的频点优先级进行小区重选的重选方式。
在该实现方式中，在若k的取值大于1的情况下，即该第一小区频点可以包括上述“至少一项”中的五项中的至少两项。
可选地，该指示信息可以包括一份“P项中的至少一项”信息，用以通过该一份“P项中的至少一项”信息，指示基于该至少两项小区频点对应的频点优先级进行小区重选的重选方式。
可选地，该指示信息可以包括至少两份“P项中的至少一项”信息，用以通过该至少两份“P项中的至少一项”信息，分别指示基于该至少两项小区频点对应的频点优先级进行小区重选的重选方式。
基于图2所示技术方案，终端设备在确定用于指示该目标网络切片组的优先级信息之后，该终端设备在执行小区重选的过程中，该终端设备基于该优先级信息所确定的目标网络切片组所关联的小区频点进行小区重选。换言之，该终端设备基于目标网络切片组的优先级所确定的该目标网络切片组所关联的小区频点进行小区重选。其中，在网络切片的场景中，终端设备在小区重选的过程中所使用的小区频点基于网络切片组的粒度而配置的情况下，终端设备基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选的方案，使得终端设备以网络切片组为小区重选的粒度进行小区重选。从而，该小区 重选的方案适配于基于网络切片组进行通信的场景的同时，也能提高小区重选的成功率，提升通信效率。
此外，在图2所示技术方案中，即终端设备基于网络切片组的优先级信息以确定目标小区的小区重选方式中，网络设备将网络切片组关联的小区重选信息(例如小区频点信息)作为向终端设备发送的一个信息，并将网络切片组所包含的网络切片的切片信息作为向终端设备发送的另一个信息，通过分开发送的方式(相比于通过同一条广播消息发送的方式)可以在提升信息传输安全性的同时，降低广播开销。
一种可能的实现方式中，在图2所示实现过程的步骤S201中，该目标网络切片组包括终端设备期望接入的网络切片。具体地，在网络切片的场景中，目标网络切片组包括终端设备期望接入的网络切片，换言之，终端设备基于该终端设备期望接入的网络切片确定该目标网络切片组。其中，在该终端设备确定目标网络切片组的优先级信息之前，该终端设备可以预先基于该终端设备期望接入的一个或多个网络切片确定该目标网络切片组。换言之，该终端设备所确定的目标网络切片组为该终端设备期望接入的网络切片组。从而，终端设备在基于该目标网络切片组的优先级进行小区重选至的目标小区之后，该终端设备可以在该目标小区进行通信，以获得该终端设备所期望接入的网络切片所对应的(业务关联的)网络服务。
示例性的，终端设备期望接入的网络切片包括以下至少一项：允许的(Allowed)单网络切片选择辅助信息(single network slice selection assistance information，NSSAI)信元所指示的网络切片、请求的NSSAI(Requested NSSAI)信元所指示的网络切片、暂停的NSSAI(suspended NSSAI)信元所指示的网络切片或与移动发起流量(mobile originated traffic，MO traffic)业务相关的网络切片。其中，终端设备可以在不同的场景中，基于上述多种方式所指示的网络切片(记为第一网络切片，也可以称为目标网络切片(Intended Slice))确定出该终端设备期望接入的网络切片。例如，对于处于空闲(Idle)态的终端设备而言，该终端设备可以将允许的NSSAI所指示的一个或多个网络切片确定为终端设备期望接入的网络切片；又如，对于处于非激活(Inactive)态的终端设备而言，该终端设备可以将暂停的NSSAI所指示的一个或多个网络切片确定为终端设备期望接入的网络切片。从而，提供多种实现方式以实现在不同场景下的通信。
可选的，终端设备确定第一网络切片的过程(即确定终端设备期望接入的一个或多个网络切片的过程)，可以参考前述“终端设备基于网络切片的粒度进行小区重选”中终端设备确定目标网络切片的实现过程，此处不做赘述。
另一种可能的实现方式中，在图2所示实现过程的步骤S201中，目标网络切片组(至少)由网络切片与网络切片组之间的对应关系所确定，网络切片与网络切片组之间的对应关系(为便于后文引用，记为第一对应关系)在终端设备当前所处的第一区域无效(或不适用、不适配等)时，该目标网络切片组包括默认网络切片，其中，第一对应关系为网络切片与网络切片组之间的对应关系，第一区域包括注册区域(registration area，RA)、跟踪区域(tracking area，TA)或公共陆地移动网(public land mobile network，PLMN)区域。
具体地，由于不同区域(RA、TA或PLMN区域)所对应的网络切片组与网络切片之间的对应关系有可能不同，因此，该终端设备可以在该第一对应关系在该终端设备当前所处的第一区域中无效时，该终端设备将默认网络切片组确定为该目标网络切片组。换言之，该终端设备确定目标网络切片组包括默认网络切片。以使得终端设备基于第一区域中的网络设备所提供的默认网络切片组关联的小区频点进行小区重选，以避免小区重选失败。
可选的，默认网络切片组包括一个或多个默认网络切片。其中，该终端设备可以在该第一对应关系在该终端设备所处的第一区域中无效时，该终端设备确定目标网络切片组包括默认网络切片组。其中，该默认网络切片组所包含的网络切片具体可以为一个或多个(由运营商定义的)默认网络切片(Default Slice)。
可选的，第一对应关系可以为该终端设备在最近一次接收来自网络设备指示的网络切片与网络切片组之间的对应关系。其中，网络设备指示的网络切片与网络切片组之间的对应关系可以承载于NAS消息(或称单播消息)中。
可选的，该第一对应关系关联于第二区域，其中，第二区域可以包括RA、TA或PLMN区域。换言之，不同的(RA、TA或PLMN)区域有可能关联于不同的对应关系。换言之，在不同的(RA、TA或PLMN)区域中，网络切片和网络切片组之间的对应关系有可能不同。其中，目标网络切片组由第一对应关系所确定也可以包括：终端设备由第一对应关系确定该目标网络切片组。
示例性的，该终端设备接收系统消息，该系统消息可以包括用于指示终端设备当前所处的第一区域的信息。在该系统消息所指示的第一区域与第一对应关系关联的第二区域相同时，该终端设备确定第一对应关系有效；在该系统消息所指示的第一区域与第一对应关系关联的第二区域不同时，该终端设备确定第一对应关系无效。
此外，终端设备基于网络切片组的优先级信息以确定目标小区的小区重选方式中，该终端设备可以基于目标网络切片组直接确定包括多个目标网络切片的目标小区，使得该终端设备能够更快捷地在支持多个目标网络切片通信的目标小区中获得更多种类的网络服务，以提升用户体验。
在图2所示步骤S201中，该终端设备可以基于多种实现方式确定目标网络切片组的优先级信息。例如，该终端设备可以基于网络设备的指示以确定该优先级信息；又如，该终端设备基于本地记录的历史切片信息确定该优先级信息。下面将结合具体的实现示例分别进行描述。
实现方式一、在图2所示步骤S201中，终端设备确定目标网络切片组的优先级信息的过程具体可以包括：该终端设备接收来自网络设备的优先级信息。换言之，该终端设备基于网络设备的指示确定该优先级信息。
可选地，该优先级信息与前文中“用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选的指示信息”可以承载于同一条消息中。
可选的，该优先级信息承载于第一指示信息，该第一指示信息至少用于指示该优先级信息。
可选的，该第一指示信息还用于指示目标网络切片组之外的其他网络切片组的优先级。
示例性的，在实现方式一中，图2所示小区重选的方法的实现过程可以表示为图4所示实现过程。其中，图2所示步骤S201的实现过程通过“步骤S401终端设备接收来自网络设备的第一指示信息”实现，步骤S402的实现过程可参考图2所示步骤S202的实现过程。
需要说明的是，终端设备在步骤S401中接收来自网络设备的第一指示信息，相应的，网络设备在步骤S401中向终端设备发送该第一指示信息。
具体地，终端设备可以基于网络设备发送的第一指示信息确定该目标网络切片组的优先级信息，其中，该第一指示信息至少用于指示该优先级信息。使得终端设备能够基于网络设备的指示(例如第一指示信息)以明确网络设备所配置的网络切片组，提升后续在步骤S402中执行小区重选的成功率。
此外，在图4所示实现过程中，该网络设备具体可以为接入网设备。
作为一种实现示例，该实现过程可以通过图5所示流程实现。其中，图5所示小区重选的方法包括如下过程：
S501a.核心网设备向接入网设备发送第一指示信息。
S501b.接入网设备向终端设备发送第一指示信息。
S502.终端设备基于(第一指示信息所指示的)优先级信息所确定的目标网络切片组所关联的小区频点进行小区重选。
相比于图4所示实现过程，图5所示步骤S502可以参考前述步骤S402的实现过程，图4所示步骤S401通过图5所示步骤S501a和步骤S501b实现。其中，在图5所示步骤S501b之前，该接入网设备可以在步骤S501a中接收来自核心网设备所发送的承载有第一指示信息的NAS消息，在步骤S501b中，该接入网设备将该承载有第一指示信息的NAS消息向终端设备转发，以使得该终端设备接收得到该第一指示信息。
实现方式二、优先级信息由目标网络切片组中每一个网络切片组所包含的网络切片的数量和/或优先级信息确定。换言之，在图2所示步骤S201中，该终端设备确定目标网络切片组的优先级信息的过程具体包括：该终端设备基于第一信息确定该优先级信息，其中，该第一信息用于指示该目标网络切片组中每一个网络切片组所包含的网络切片的数量和/或优先级信息。
示例性的，在实现方式二中，图2所示小区重选的方法的实现过程可以表示为图6所示实现过程。其中，图2所示步骤S201的实现过程通过“步骤S601核心网设备向接入网设备发送第一信息”、“步骤S601b接入网设备向终端设备发送第一信息。”以及“步骤S602终端设备基于第一信息确定优先级信息”实现，步骤S603的实现过程可参考图2所示步骤S202的实现过程。
具体地，在图6所示步骤S601b之前，该接入网设备可以在步骤S601a接收来自核心网设备所发送的承载有第一信息的NAS消息，在步骤S601b中，该接入网设备将该承载有第一信息的NAS消息向终端设备转发，以使得该终端设备接收得到该第一信息。此后，终端设备可以在步骤S602中基于该第一信息所指示的目标网络切片组中所包含的网络切片 的信息确定该目标网络切片组的优先级信息。换言之，终端设备在步骤S602中基于目标网络切组所包含的网络切片的信息(例如优先级信息、数量信息等)以确定该优先级信息。其中，该第一信息为基于网络设备在步骤S601b中的指示所确定的，使得终端设备能够基于网络设备的指示(即第一信息)以明确网络设备所配置的网络切片组所包含的网络切片的信息，提升后续在步骤S603(即图2所示步骤S202)中执行小区重选的成功率。
作为一种可能的实现方式，该第一信息包括以下至少一项：
该目标网络切片组中，每一个网络切片组所包含的网络切片的优先级高低信息；或，
该目标网络切片组中，每一个网络切片组所包含的网络切片的优先级数值；或，
该目标网络切片组中，每一个网络切片组所包含的网络切片的数量；或，
该目标网络切片组中，每一个网络切片组所包含的目标网络切片的优先级高低信息；或，
该目标网络切片组中，每一个网络切片组所包含的目标网络切片的优先级数值；或，
该目标网络切片组中，每一个网络切片组所包含的目标网络切片的数量。
具体地，第一信息具体可以为上述一项或多项信息的组合，在提升终端设备的实现灵活性的同时，可以从多个维度(例如优先级信息的维度、数量信息的维度等)的信息提供优先级信息的确定依据。
可选的，作为在实现方式二的一种实现方式，在上述第一信息包括该目标网络切片组中，每一个网络切片组所包含的网络切片的优先级高低信息(记为第二信息)的场景中，有可能出现每一个网络切片在目标网络切片组仅出现一次；换言之，在该场景中，目标网络切片组中不同网络切片组所包含的网络切片各不相同(或目标网络切片组中不同网络切片组所包含的网络切片不存在相同的网络切片)。此时，图2所示实现过程还可以通过图7所示实现过程实现。图7所示实现过程包括如下步骤。
S701a.核心网设备向接入网设备发送第二信息。
S701b.接入网设备向终端设备发送第二信息。
S702.终端设备基于第二信息所确定的目标网络切片组所关联的小区频点进行小区重选。
具体地，与图2所示小区重选的方法的实现过程的不同之处在于，在图7所示实现方式中，终端设备可以在步骤S701b中接收第二信息之后，该终端设备在步骤S702中，基于第二信息所指示的网络切片的优先级高低确定最高优先级的网络切片对应的网络切片组，并基于该网络切片组关联的频点进行小区重选。相比于前述图2至图6所示实现方式，在图7所示实现过程中，由于目标网络切片组中不同网络切片组所包含的网络切片各不相同，使得网络切片的优先级高低可以等价于该网络切片所属的网络切片组的优先级高低。从而，该终端设备在步骤S702中可以基于第二信息所指示的(等价于目标网络切片组的优先级高低的)网络切片的优先级高低，在目标网络切片组所关联的小区频点进行小区重选，提供了在图7所示特殊场景的一种解决方案。
实现方式三、在图2所示步骤S201中，该终端设备确定目标网络切片组的优先级信息的过程具体包括：该终端设备基于历史使用(或称历史接入)的网络切片信息确定该优先级信息。
具体地，终端设备可以基于该终端设备历史使用的网络切片信息确定该目标网络切片组的优先级信息。其中，由于历史使用的网络切片信息可以在一定程度上反映出该终端设备的特定信息(例如业务偏好信息、持续时长等)，使得该终端设备在图2所示步骤S202中基于历史接入的网络切片信息所确定的优先级信息进行小区重选，所确定的目标小区能够提供该终端设备的特定信息所对应的网络服务，以提升用户体验。
下面将结合图8所示通信场景，对上述图2至图6所示实现过程(实现方式一、实现方式二和实现方式三)进行描述。
示例性的，在图8中，Cell 1为终端设备(记为UE)的驻留小区(Camping Cell)，Cell 2、Cell 3和小Cell 4为UE的候选小区。
对于Cell 1，支持的接入频点记为F1，支持的网络切片包括网络切片1、网络切片3和网络切片4(Slice 1，3，4)。
对于Cell 2，支持的接入频点记为F2，支持的网络切片包括网络切片2、网络切片3、网络切片4和网络切片5(Slice 2，3，4，5)。
对于Cell 3，支持的接入频点记为F3，支持的网络切片包括网络切片1、网络切片2和网络切片5(Slice 1，2，5)。
对于Cell 4，支持的接入频点记为F4，支持的网络切片包括网络切片3和网络切片4(Slice 3，4)。
在图8所示场景的一个实现示例中，不同网络切片组和多个网络切片之间的(基于前述方案一、方案二、方案三或其它方案所确定的)对应关系可以包括：
网络切片组1对应网络切片1、网络切片3和网络切片4，记为：SG1＝{S1，S3，S4}。
网络切片组2对应网络切片2、网络切片3、网络切片4和网络切片5，记为：SG2＝{S2，S3，S4，S5}。
网络切片组3对应网络切片1、网络切片2和网络切片5，记为：SG3＝{S1，S2，S5}。
网络切片组4对应网络切片3和网络切片4，记为：SG4＝{S3，S4}。
其中，上述四个小区处于同一个RA(或TA或PLMN区域)，换言之，上述分组的对应关系在四个小区内都是有效的。
此外，进一步假设切片优先级从低到高排序满足：
网络切片1、网络切片2、网络切片3、网络切片4和网络切片5，记为：P(S1)<P(S2)<P(S3)<P(S4)<P(S5)。
并假设网络切片3的优先级和网络切片4的优先级之和与网络切片2和网络切片5的优先级之和相同，记为：P(S3)+P(S4)＝P(S2)+P(S5)。
需要说明的是，下述实现示例一至实现示例六中任一实施例所涉及的步骤1和步骤2，即为前述图2实施例中步骤S201的一种实现示例，下述实现示例一至实现示例六中任一实现示例所涉及的步骤3记为前述图2实施例中步骤S202的一种实现示例。
实现示例一：为前述实现方式一的一个实现示例。
在实现示例一中，假设终端设备确定目标网络切片为网络切片3(记为Intended Slice＝S3)，具体步骤如下所示。
步骤1、终端设备确定(一个或多个)目标网络切片对应的目标网络切片组。
其中，终端设备的NAS层确定目标网络切片为S3，并且，该终端设备确定目标网络切片组与关联NSSAI的对应关系在当前RA(或TA或PLMN区域)内有效，则根据S3的S-NSSAI通过对应关系找到相应的目标网络切片组，即该终端设备确定目标网络切片组为网络切片组1，网络切片组2和网络切片组4(记为：SG1，SG2，SG4)。
步骤2、终端设备根据(来自CN的)NAS消息确定目标网络切片组的优先级信息。
可选的，该终端设备在步骤1之后，在步骤2中可以基于目标网络切片组中的每一个网络切片组所包含的目标网络切片的数量进行筛选。其中，由于SG1，SG2和SG4所包含的目标网络切片(即S3)的数量均为1，因此，该终端设备确定该目标网络切片组无需筛选而排除部分网络切片组。
可选的，上述终端设备确定目标网络切片组包括网络切片组1，网络切片组2和网络切片组4的过程，可以包括以下两种实现方式：
方式一、终端设备的NAS层根据目标网络切片即S3通过对应关系得到目标网络切片组为网络切片组1、网络切片组2和网络切片组4(记为Intended Slice Group ID(s)＝SG1，SG2，SG4)。
方式二、终端设备的NAS层将目标网络切片即S3的S-NSSAI和对应关系转发至AS层，然后在AS层再根据S3的S-NSSAI通过对应关系得到目标网络切片组为网络切片组1、网络切片组2和网络切片组4(记为Intended Slice Group ID(s)＝SG1，SG2，SG4)。
由上述过程可知，目标网络切片组为网络切片组1、网络切片组2和网络切片组4，本实施例中目标网络切片组的优先级可从CN通过NAS层直接发送给终端设备的NAS消息中获取。其优先级形式可以是对每一个目标网络切片组对应的优先级进行具体的赋值，也可以是按照一定规则进行排序后的目标网络切片组ID列表。
在本实施例中，由前述对图8所示场景描述的条件可得到如下实现过程。
已知CN提供的目标网络切片组对应的优先级信息可以表示为：优先级排序满足：P(SG4)<P(SG2)<P(SG3)<P(SG1)。从而，CN提供的目标网络切片组对应的优先级信息可以表示为：目标网络切片组优先级按照从高到低可表示为列表＝{SG1，SG2，SG4}；
可选的，上述终端设备根据(来自CN的)NAS消息确定目标网络切片组的优先级信息的过程可以包括以下两种实现方式：
方式一、终端设备的NAS层根据CN直接提供的目标网络切片组的优先级的信息得到目标网络切片组的优先级。
方式二、终端设备的NAS层将CN直接提供的目标网络切片组的优先级的信息转发至AS层，然后在AS层再根据上述信息得到目标网络切片组的优先级。
步骤3、终端设备按照步骤2得到的目标网络切片组的优先级信息进行小区重选。
可选的，终端设备在步骤3中，按照最高优先级的目标网络切片组对应的频点优先级进行小区重选。示例性的，由步骤2可知最高优先级的目标网络切片组是SG1，根据SG1对应广播的频点(重选)优先级进行终端设备的小区重选。
实现示例二、为前述实现方式二的一个实现示例。
在实现示例二的一种实现方式中，假设终端设备确定目标网络切片为网络切片1(记为Intended Slice＝S1)，具体步骤如下所示。
步骤1、终端设备确定目标网络切片对应的目标网络切片组。
其中，终端设备的NAS层确定目标网络切片为S1，并且已知目标网络切片组与关联NSSAI的对应关系在当前RA内有效，则根据S1的S-NSSAI通过对应关系找到相应的目标网络切片组，例如，SG1，SG3。
步骤2、终端设备基于第一信息确定目标网络切片组的优先级信息。
具体地，该终端设备根据第一信息(包括目标网络切片组中关联的网络切片数量及各个网络切片对应的优先级)确定目标网络切片组的优先级。
在步骤2中，优先级信息的实现形式可以是对每一个目标网络切片组对应的优先级进行具体的赋值，也可以是按照一定规则进行排序后的目标网络切片组列表。
可选的，在实现示例二中，上述第一信息所包含的各个信息依次参与“确定优先级信息”的确定过程包括如下实现。
1)在步骤2中，终端设备可以基于目标网络切片组中的每一个网络切片组所包含的目标网络切片的数量进行筛选，以确定优先级信息。其中，由于SG1，SG3所包含的目标网络切片(即S1)的数量均为1，因此，目标网络切片组为网络切片组1和网络切片组3(记为Intended Slice Group ID(s)＝SG1，SG3)。
可选的，上述过程又可以分为两种实现方式：
方式一、终端设备的NAS层根据目标网络切片即S1通过对应关系得到目标网络切片组为网络切片组1和网络切片组3(记为Intended Slice Group ID(s)＝SG1，SG3)。
方式二、终端设备的NAS层将目标网络切片即S1的S-NSSAI和对应关系转发至AS层，然后在AS层再根据S1的S-NSSAI通过对应关系得到目标网络切片组为网络切片组1和网络切片组3(记为Intended Slice Group ID(s)＝SG1，SG3)。
2)在步骤2中，终端设备可以基于目标网络切片组中每一个网络切片组所包含的网络切片的切片数量确定优先级信息。具体地，该终端设备按照目标网络切片组关联的网络切片数量设置优先级，其关联的网络切片数量越多，对应的目标网络切片组优先级越高。在本实施例中SG1和SG3均关联3个网络切片，因此还需进一步区分优先级；
3)在步骤2中，终端设备可以基于目标网络切片组中每一个网络切片组所包含的网络切片的优先级确定优先级信息。具体地，该终端设备按照目标网络切片组关联的网络切片对应的网络切片优先级之和设置优先级，其关联的网络切片优先级之和越大，对应的目标网络切片组优先级越高。在本实施例中由于已知P(S3)+P(S4)＝P(S2)+P(S5)，即Sum(P(S1)，P(S3)，P(S4))＝Sum(P(S1)，P(S2)，P(S5))，SG1和SG3的优先级仍需进一步区分。
可选的，下面将对关于目标网络切片组的优先级具体如何确定的实现过程进行描述。其中，实施例中给出的网络切片优先级的大小及数量之和(Sum)均为优先级的逻辑概念，即P(Sx)仅表示的是Sx的优先级，这个优先级可以是具体数值(记为value)，也可以是针对多个网络切片排序后的优先级顺序，比如P(Sx)<P(Sy)可能是已知P(Sx)＝1，P(Sy)＝0比较得出(基站内实现是value越小优先级越大，这里只是示例，也可存在value越大优先级越大的关系)；也可能是根据多个网络切片已知优先级排序得出。
可选的，目标网络切片组的优先级确定方法于上述类似，若网络切片优先级是由多个网络切片排序后的优先级顺序得到，这时为了方便进一步通过Sum计算出目标网络切片组的优先级，需要先为网络切片优先级赋值，具体实现方式不做限定。
4)在步骤2中，终端设备可以基于目标网络切片组所包含的网络切片的优先级高低信息确定优先级信息。
具体地，该终端设备按照目标网络切片组中每一个网络切片组所关联的最高优先级的网络切片所对应的优先级设置该网络切片组的优先级，其关联的最高优先级的网络切片所对应的优先级越高，对应的目标网络切片组优先级越高。若最高优先级的网络切片所对应的优先级相同，则继续找到剩余切片中找到最高优先级的网络切片以此类推，直至区分出目标网络切片组的优先级。在本实施例中，SG1相关联的网络切片中最高优先级的网络切片所对应的优先级为P(S4)，SG3相关联的网络切片中最高优先级的网络切片所对应的优先级为P(S5)，由P(S4)<P(S5)可以得到目标网络切片组优先级为P(SG1)＝P(S4)，P(SG3)＝P(S5)即P(SG1)<P(SG3)，或者目标网络切片组优先级按照从高到低表示为列表＝{SG3，SG1}。
可选的，步骤2的实现过程可以包括如下两种实现方式：
方式一、终端设备的NAS层根据目标网络切片组标识和目标网络切片组中关联的网络切片数量及各个网络切片对应的优先级得到目标网络切片组的优先级。
方式二、终端设备的NAS层将目标网络切片组标识和目标网络切片组中关联的网络切片数量及各个网络切片对应的优先级转发至AS层，然后在AS层再根据上述信息得到目标网络切片组的优先级。
步骤3、终端设备按照步骤2得到的优先级信息进行小区重选。
可选的，终端设备在步骤3中，按照最高优先级的目标网络切片组对应的频点优先级进行小区重选。示例性的，由步骤2可知最高优先级的目标网络切片组是SG3，根据SG3对应广播的频点(重选)优先级进行终端设备的小区重选。
在实现示例二的另一种实现方式中，假设终端设备在该网络切片集合所包含的网络切片中确定目标网络切片为网络切片2(记为Intended Slice＝S2)，具体步骤如下所示。
步骤1、终端设备确定目标网络切片对应的目标网络切片组。
其中，终端设备的NAS层确定目标网络切片为S2，并且已知目标网络切片组与关联NSSAI的对应关系在当前RA内有效，则根据S2的S-NSSAI通过对应关系找到相应的目标网络切片组，即SG2，SG3。
步骤2、终端设备基于第一信息确定目标网络切片组的优先级信息。
具体地，该终端设备在步骤2中根据第一信息(包括目标网络切片组中关联的网络切片数量及各个网络切片对应的优先级)确定目标网络切片组的优先级。
在步骤2中，优先级信息的实现形式可以是对每一个目标网络切片组对应的优先级进行具体的赋值，也可以是按照一定规则进行排序后的目标网络切片组列表。
可选的，步骤2的实现过程可以包括如下两种实现方式：
方式一、终端设备的NAS层根据目标网络切片组标识和目标网络切片组中关联的网络切片数量及各个网络切片对应的优先级得到目标网络切片组的优先级。
方式二、终端设备的NAS层将目标网络切片组标识和目标网络切片组中关联的网络切片数量及各个网络切片对应的优先级转发至AS层，然后在AS层再根据上述信息得到目标网络切片组的优先级。
可选的，在目标网络切片为网络切片2的情况下，终端设备在步骤2中基于第一信息所包含的各个信息依次参与“确定优先级信息”的确定过程，可以参考前述在目标网络切片为网络切片1的情况下所对应的确定过程，此处不做赘述。
示例性的，在步骤2中，终端设备可以基于目标网络切片组中每一个网络切片组所包含的网络切片的切片数量确定优先级信息。具体地，该终端设备按照目标网络切片组关联的网络切片数量设置优先级，其关联的网络切片数量越多，对应的目标网络切片组优先级越高。在本实施例中，SG2关联4个切片，SG3关联3个切片，可以得到SG2的优先级高于SG3的优先级，记为P(SG3)<P(SG2),或者Intended Slice Group ID优先级按照从高到低表示为列表L PSG＝{SG2，SG3}。
步骤3、终端设备按照步骤2得到的优先级信息进行小区重选。
可选的，终端设备在步骤3中，按照最高优先级的目标网络切片组对应的频点优先级进行小区重选。示例性的，由步骤2可知最高优先级的目标网络切片组是SG2，根据SG2对应广播的频点(重选)优先级进行终端设备的小区重选。
需要说明的是，在本实施例中，假设终端设备所确定的网络切片集合所包含的网络切片包括网络切片1和网络切片2(例如，当网络切片集合通过Slice List实现时，可以记为Slice List＝{S1，S2}，其中，S1不是该终端设备的Intended Slice)。或者，在本实施例中，假设终端设备所确定的网络切片组集合中的任一网络切片组所包含的网络切片包括网络切片1或网络切片2(例如，当网络切片组集合通过Slice Group List实现时，可以记为Slice Group List＝{SG1，SG2，SG3}，其中，SG1并不包含该终端设备的Intended Slice)。
在一种可能的实现方式中，在步骤3之前，该网络设备还发送指示信息；相应的，该终端设备接收来自该网络设备的指示信息，该指示信息用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；其中，该第一小区频点包括以下至少一项：
网络切片集合所包含的一个或多个网络切片所关联的小区频点，该网络切片集合包括该终端设备期望接入的网络切片；或，未与网络切片关联的小区频点；或，网络切片组集合所包含的一个或多个网络切片组所关联的小区频点，该网络切片组集合包括该终端设备期望接入的网络切片对应的网络切片组；或，未与网络切片组关联的小区频点；或，该优 先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点。
在该实现方式中，终端设备还可以接收该指示信息，使得该终端设备在步骤3基于目标小区频点(SG2对应的一个或多个小区频点)进行小区重选的过程中，可以基于该指示信息明确在基于该目标小区频点进行小区重选失败之后，该终端设备可以基于第一小区频点对应的频点优先级进行小区重选。以使得终端设备在基于该目标小区频点进行小区重选失败的情况下，可以基于指示信息进一步执行小区重选，以进一步提高该终端设备执行小区重选的成功率。
可选地，在第一小区频点不包括该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点(为便于描述，记为第二小区频点)的情况下，该终端设备在步骤3中，进行小区重选包括：该终端设备确定基于SG2对应的一个或多个小区频点进行小区重选失败之后，该终端设备基于第二小区频点(即SG3对应的一个或多个小区频点)进行小区重选；该终端设备确定基于该第二小区频点进行小区重选失败之后，该终端设备基于该第一小区频点进行小区重选。
应理解，该指示信息可以为取值可变的信元(例如一个或多个布尔值、一个或多个比特值等)，或者，该指示信息可以为可选信元，其实现方式可以参考前述步骤S202中的相关描述，并实现相应的技术效果，此处不做赘述。
示例性的，在网络设备所发送的指示信息用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选的情况下，该终端设备在步骤3中，可以基于第一小区频点的多种实现方式进行多种小区重选过程，下面将结合一些实现示例进行描述。
一种实现示例中，在第一小区频点包括网络切片集合所包含的一个或多个网络切片所关联的小区频点的情况下，如前述假设中“Slice List＝{S1，S2}”。在该示例中，终端设备在步骤3中以SG2对应的一个或多个小区频点执行小区重选失败之后，该终端设备将上述步骤1中的“Intended Slice＝S2”替换为“Intended Slice＝S1”，重复执行步骤1至步骤3。
另一种实现示例中，在第一小区频点包括网络切片组集合所包含的网络切片组所关联的一个或多个小区频点的情况下，如前述假设中“Slice Group List＝{SG1，SG2，SG3}”。在该示例中，终端设备在步骤3中以SG2对应的一个或多个小区频点执行小区重选失败之后，该终端设备基于SG1和SG3对应的一个或多个小区频点执行小区重选。
另一种实现示例中，在第一小区频点包括该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点的情况下，如前述步骤1可知，该“其他网络切片组”包括SG3。在该示例中，终端设备在步骤3中以SG2对应的一个或多个小区频点执行小区重选失败之后，该终端设备基于SG3对应的一个或多个小区频点执行小区重选。
另一种实现示例中，在第一小区频点包括未与网络切片关联的小区频点和/或未与网络切片组关联的小区频点的情况下，终端设备在步骤3中以SG2对应的一个或多个小区频点执行小区重选失败之后，该终端设备回退至传统(legacy)的小区重选流程。换言之，在 该示例中，该第一小区频点所包含的一个或多个小区频点无需基于网络切片(和/或网络切片组)所确定。
需要说明的是，上述示例中为该第一小区频点可以包括上述“至少一项”中的五项中的任意一项作为示例进行说明。而在该第一小区频点可以包括上述“至少一项”中的五项中的至少两项的情况下，终端设备可以通过配置或预配置的方式确定该至少两项的执行顺序的先后排序，该至少两项的每一项的实现过程可以参考上述示例的描述，此处不做赘述。
实现示例三、为前述实现方式二的一个实现示例。
在实现示例三中，假设终端设备确定目标网络切片为网络切片1、网络切片2和网络切片4(记为：Intended Slice＝S1，S2，S4)，具体步骤如下所示。
步骤1、终端设备确定目标网络切片对应的目标网络切片组。
其中，终端设备的NAS层确定目标网络切片为S1，S2，S4，并且已知目标网络切片组与关联NSSAI的对应关系在当前RA内有效，则根据S1，S2，S4的S-NSSAI通过对应关系找到相应的目标网络切片组，即SG1，SG2，SG3，SG4。
步骤2、终端设备基于第一信息确定目标网络切片组的优先级信息。
具体地，该终端设备在步骤2中根据第一信息(包括目标网络切片组中关联的网络切片数量及各个网络切片对应的优先级)确定目标网络切片组的优先级。
在步骤2中，优先级信息的实现形式可以是对每一个目标网络切片组对应的优先级进行具体的赋值，也可以是按照一定规则进行排序后的目标网络切片组列表。
可选的，在实现示例三中，上述第一信息所包含的各个信息依次参与“确定优先级信息”的确定过程包括如下实现。
1)在步骤2中，终端设备可以基于目标网络切片组中的每一个网络切片组所包含的目标网络切片的数量进行筛选，以确定优先级信息。其中，SG1，SG2，SG3和SG4所包含的目标网络切片(即S1，S2，S4)的数量为(2，2，2，1)，即Intended Slice Group ID(s)＝SG1，SG2，SG3。
可选的，上述过程又可以分为两种实现方式：
方式一、终端设备的NAS层根据目标网络切片即S1，S2，S4通过对应关系得到目标网络切片组为网络切片组1、网络切片组2和网络切片组3(记为Intended Slice Group ID(s)＝SG1，SG2，SG3)。
方式二、终端设备的NAS层将目标网络切片即S1，S2，S4的S-NSSAI和对应关系转发至AS层，然后在AS层再根据S1，S2，S4的S-NSSAI通过对应关系得到目标网络切片组为网络切片组1、网络切片组2和网络切片组3(记为Intended Slice Group ID(s)＝SG1，SG2，SG3)；
2)在步骤2中，终端设备可以基于目标网络切片组中每一个网络切片组所包含的网络切片的切片数量确定优先级信息。具体地，该终端设备按照目标网络切片组关联的切片数量设置优先级，其关联的切片数量越多，对应的目标网络切片组优先级越高。在本实施例中SG1，SG2，和SG3分别关联3，4和3个网络切片，则可知SG2对应的优先级最高，SG1和SG3 的优先级还需进一步区分优先级(步骤2剩余流程和实现示例二类似，具体可参考前述实现过程)。
综上可以得到目标网络切片组的优先级P(SG1)<P(SG3)<P(SG2)，或者目标网络切片组的优先级按照从高到低表示为列表＝{SG2，SG3，SG1}。
可选的，上述过程又可以分为两种实现方式：
方式一、终端设备的NAS层根据目标网络切片组标识和目标网络切片组中关联的切片数量及各个网络切片对应的优先级得到目标网络切片组的优先级；
方式二、终端设备的NAS层将目标网络切片组标识和目标网络切片组中关联的切片数量及各个网络切片对应的优先级转发至AS层，然后在AS层再根据上述信息得到目标网络切片组的优先级。
步骤3、按照最高优先级的目标网络切片组对应的频点优先级进行小区重选。
由步骤2可知最高优先级的目标网络切片组是SG2，根据SG2对应广播的频点(重选)优先级进行终端设备的小区重选。
作为实现示例二和实现示例三的一种可能的实现方式，实现示例二和实现示例三中的任一实现示例可以通过图9所示过程实现。在图9所示示例中，将目标网络切片记为Intended Slice，将目标网络切片组的标识记为Intended Slice Group ID(s)。
其中，图9所示过程具体包括如下步骤。
A1.终端设备遍历Intended Slice。
A2.终端设备确定Intended Slice Group ID(s)＝包含Intended Slice数量最多的Slice Group(s)。
A3.终端设备判断多个Intended Slice Group ID关联的切片数量是否相同？若是，则执行步骤A6，若否，则执行步骤A4。
A4.终端设备在步骤A3中确定多个Intended Slice Group ID关联的切片数量不同时，该终端设备确定切片数量越多的，对应的Intended Slice Group ID优先级越高，并执行步骤A5。
A5.终端设备按照最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选。
可选地，终端设备在步骤A5之前，可以接收来自网络设备的“用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选的指示信息”。在这种情况下，该终端设备在步骤A5的实现过程中，若基于最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选失败，则该终端设备还需要基于该指示信息进一步在第一小区频点执行小区重选。其中，该“指示信息”以及“第一小区频点”的多种实现方式可以参考前述描述，此处不做赘述。
A6.终端设备在步骤A3中确定Intended Slice Group ID关联的切片数量相同时，该终端设备判断多个Intended Slice Group ID关联的网络切片的切片优先级之和是否相同？若是，则执行步骤A8，若否，则执行步骤A7。
A7.终端设备在步骤A6中确定多个Intended Slice Group ID关联的网络切片的切片优先级之和不同时，该终端设备确定网络切片优先级之和越大，对应的Intended Slice Group ID优先级越高，并执行步骤A5。
A8.终端设备在步骤A6中确定多个Intended Slice Group ID关联的网络切片的切片优先级之和相同时，该终端设备在Intended Slice Group ID关联的切片中找到最高优先级的切片并执行步骤A9。
A9.终端设备判断该切片对应的优先级是否相同？若是，则执行步骤A11，若否，则执行步骤A10。
A10.终端设备在在步骤A9中确定该切片对应的优先级不同时，该终端设备确定最高优先级的切片所对应的优先级越高，对应的Intended Slice Group ID优先级越高，并执行步骤A5。
A11.终端设备在步骤A9中确定该切片对应的优先级相同时，继续在剩余切片中找到最高优先级的切片，并执行步骤A9。
可选的，当终端设备在步骤A5中确定网络切片与网络切片组之间的对应关系(该对应关系的实现过程可参考前述图2的描述，此处不再赘述)在终端设备当前所处的第一区域无效(或不适用、不适配等)时，该终端设备确定无法基于步骤A4(或步骤A7，或步骤A10)所确定的最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选。此后，该终端设备可以基于包含有一个或多个默认网络切片的默认网络切片组对应的频点优先级进行小区重选，以提高小区重选的成功率。
作为一种实现示例，上述实现示例二至实现示例三的实现过程也可以通过图10a所示过程实现。如图10a所示，该过程包括如下步骤。
需要说明的是，在图10a所示实现示例中，以终端设备记为UE，网络设备包括接入网设备记为gNB和核心网设备记为CN为例进行说明。
1.CN通过gNB向UE发送NAS消息，该NAS消息包括Slice Group ID(S)和S-NSSAI(S)之间的对应关系、S-NSSAI(S)的优先级。
2.gNB向UE发送广播消息，该广播消息包括基于Slice Group ID的网络切片信息(Slice Info)，例如该Slice Info包括小区频点信息。
3.可选实现方式一(Opt#1)，UE的NAS层根据对应关系得到Intended Slice Group ID(S)。
3.可选实现方式二(Opt#2)，UE的AS层根据NAS层转发的对应关系得到Intended Slice Group ID(S)。
4.可选实现方式一(Opt#1)，UE的NAS层根据Intended Slice Group ID(S)中关联的切片数量及各个切片对应的优先级确定Intended Slice Group ID的优先级。
4.可选实现方式二(Opt#2)，UE的AS层根据NAS层转发的Intended Slice Group ID(S)中关联的切片数量及各个切片对应的优先级确定Intended Slice Group ID的优先级。
5.UE和gNB之间，按照最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选。
可选地，图10a所示过程还可以通过图10b所示过程实现，两者区别在于步骤2的实现过方式，其它步骤均相同。在图10b的步骤2中，该广播消息还可以包括“用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选的指示信息”。其中，该“指示信息”以及“第一小区频点”的多种实现方式可以参考前述描述，此处不做赘述。从而，在图10b所示步骤5中，在终端设备基于最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选失败的情况下，该终端设备可以基于该指示信息所指示的第一小区频点进行小区重选，以提升该终端设备的小区重选的成功率。
应理解，图10b中以该“指示信息”承载于步骤2中的广播消息作为示例进行描述，在实际应用中，该“指示信息”还可以承载于其它消息，例如RRC消息、MAC CE消息或DCI消息等，或者是其他的消息，此处不做限定。
从而，基于实现示例二和实现示例三的实现方案，不仅能减少系统开销和保证传输安全性，确定Slice Group ID的优先级以适配基于网络切片组的粒度进行小区重选方案以及MO触发的业务场景。
实现示例四：为前述实现方式二的一个实现示例。
在实现示例四中，假设终端设备确定目标切片为网络切片3(记为Intended Slice＝S3)，具体步骤如下所示：
步骤1、终端设备确定目标网络切片对应的目标网络切片组。
其中，终端设备的NAS层确定目标网络切片为S3，并且已知目标网络切片组与关联NSSAI的对应关系在当前RA内有效，则根据S3的S-NSSAI通过对应关系找到相应的目标网络切片组，即SG1，SG2，SG4。
步骤2、终端设备基于第一信息确定目标网络切片组的优先级信息。
具体地，该终端设备在步骤2中根据第一信息(包括目标网络切片组中关联各个网络切片对应的优先级)确定目标网络切片组的优先级。
在步骤2中，优先级信息的实现形式可以是对每一个目标网络切片组对应的优先级进行具体的赋值，也可以是按照一定规则进行排序后的目标网络切片组列表。
可选的，在实现示例四中，上述第一信息所包含的各个信息依次参与“确定优先级信息”的确定过程包括如下实现。
1)在步骤2中，终端设备可以基于目标网络切片组中的每一个网络切片组所包含的目标网络切片的数量进行筛选，以确定优先级信息。其中，由于SG1，SG2和SG4所包含的目标网络切片(即S3)的数量均为1，记为Intended Slice Group ID(s)＝SG1，SG2，SG4。
可选的，上述过程又可以分为两种实现方式：
方式一、终端设备的NAS层根据目标网络切片即S3通过对应关系得到目标网络切片组为网络切片组1、网络切片组2和网络切片组4(记为Intended Slice Group ID(s)＝SG1，SG2，SG4)。
方式二、终端设备的NAS层将目标网络切片即S3的S-NSSAI和对应关系转发至AS层，然后在AS层再根据S3的NSSAI通过对应关系得到目标网络切片组为网络切片组1、网络切片组2和网络切片组4(记为Intended Slice Group ID(s)＝SG1，SG2，SG4)；
2)在步骤2中，终端设备可以基于目标网络切片组所包含的网络切片优先级高低信息确定优先级信息。
具体地，该终端设备按照目标网络切片组中每一个网络切片组所关联的最高优先级的网络切片所对应的优先级设置该网络切片组的优先级，其关联的最高优先级的网络切片所对应的优先级越高，对应的目标网络切片组优先级越高。若最高优先级的网络切片所对应的优先级相同，则继续找到剩余切片中找到最高优先级的网络切片以此类推，直至区分出目标网络切片组的优先级，其中如果出现某一组SGx关联的网络切片已经被遍历完且存在另外一组SGy仍在遍历，则默认P(SGx)<P(SGy)(即SGx关联的网络切片对应的优先级是SGy的子集)。在本实施例中，SG1，SG2，SG4相关联的网络切片中最高优先级的网络切片所对应的优先级分别为P(S4)，P(S5)，P(S4)，由P(S4)<P(S5)可知SG2对应的优先级最高。又因为SG1和SG4关联的最高优先级的网络切片相同且SG4先被遍历完，最终得到目标网络切片组优先级按照从高到低可表示为列表＝{SG2，SG1，SG4}；
可选的上述过程又可以分为两种实现方式：
方式一、终端设备的NAS层根据目标网络切片组标识和目标网络切片组中关联的各个网络切片对应的优先级得到目标网络切片组的优先级。
方式二、终端设备的NAS层将目标网络切片组标识和目标网络切片组中关联的各个网络切片对应的优先级转发至AS层，然后在AS层再根据上述信息得到目标网络切片组的优先级。
步骤3、终端设备按照步骤2得到的优先级信息进行小区重选。
可选的，终端设备在步骤3中，按照最高优先级的目标网络切片组对应的频点优先级进行小区重选。示例性的，由步骤2可知最高优先级的目标网络切片组是SG2，根据SG2对应广播的频点(重选)优先级进行终端设备的小区重选。
实现示例五、为前述实现方式二的一个实现示例。
在实现示例五中，假设终端设备确定目标网络切片为网络切片1、网络切片2和网络切片4(记为：Intended Slice＝S1，S2，S4)，具体步骤如下所示。
步骤1、终端设备确定目标网络切片对应的目标网络切片组。
其中，终端设备的NAS层确定目标网络切片为S1，S2，S4，并且已知目标网络切片组与关联NSSAI的对应关系在当前RA内有效，则根据S1，S2，S4的S-NSSAI通过对应关系找到相应的目标网络切片组，即SG1，SG2，SG3，SG4。
步骤2、终端设备基于第一信息确定目标网络切片组的优先级信息。
具体地，该终端设备在步骤2中根据第一信息(包括目标网络切片组中关联各个网络切片对应的优先级)确定目标网络切片组的优先级。
在步骤2中，优先级信息的实现形式可以是对每一个目标网络切片组对应的优先级进行具体的赋值，也可以是按照一定规则进行排序后的目标网络切片组列表。
可选的，在实现示例五中，上述第一信息所包含的各个信息依次参与“确定优先级信息”的确定过程包括如下实现。
1)在步骤2中，终端设备可以基于目标网络切片组中的每一个网络切片组所包含的目标网络切片的数量进行筛选，以确定优先级信息。其中，SG1，SG2，SG3和SG4所包含的目标网络切片(即S1，S2，S4)的数量为(2，2，2，1)，即Intended Slice Group ID(s)＝SG1，SG2，SG3；
可选的，上述过程又可以分为两种实现方式：
方式一、终端设备的NAS层根据目标网络切片即S1，S2，S4通过对应关系得到目标网络切片组为网络切片组1、网络切片组2和网络切片组3(记为Intended Slice Group ID(s)＝SG1，SG2，SG3)。
方式二、终端设备的NAS层将目标网络切片即S1，S2，S4的S-NSSAI和对应关系转发至AS层，然后在AS层再根据S1，S2，S4的S-NSSAI通过对应关系得到Intended Slice Group ID(s)＝SG1，SG2，SG3；
2)在步骤2中，终端设备可以基于目标网络切片组所包含的网络切片优先级高低信息确定优先级信息。
具体地，该终端设备按照目标网络切片组中每一个网络切片组所关联的最高优先级的网络切片所对应的优先级设置该网络切片组的优先级，其关联的最高优先级的网络切片所对应的优先级越高，对应的目标网络切片组优先级越高。若最高优先级的网络切片所对应的优先级相同，则继续找到剩余网络切片中找到最高优先级的网络切片以此类推，直至区分出目标网络切片组的优先级，其中如果出现某一组SGx关联的网络切片已经被遍历完且存在另外一组SGy仍在遍历，则默认P(SGx)<P(SGy)(即SGx关联的网络切片对应的优先级是SGy的子集)。在本实施例中，SG1，SG2，SG3相关联的网络切片中最高优先级的网络切片所对应的优先级分别为P(S4)，P(S5)，P(S5)，由P(S4)<P(S5)可知SG1对应的优先级最小。又因为SG2和SG4关联的剩余网络切片中最高优先级对应的网络切片分别为S4和S2，由于P(S2)<P(S4)，最终得到目标网络切片组优先级按照从高到低可表示为列表＝{SG2，SG3，SG1}。
可选的，上述过程又可以分为两种实现方式：
方式一、终端设备的NAS层根据目标网络切片组标识和目标网络切片组中关联的各个网络切片对应的优先级得到目标网络切片组的优先级。
方式二、终端设备的NAS层将目标网络切片组标识和目标网络切片组中关联的各个网络切片对应的优先级转发至AS层，然后在AS层再根据上述信息得到目标网络切片组的优先级。
步骤3、终端设备按照步骤2得到的优先级信息进行小区重选。
可选的，终端设备在步骤3中，按照最高优先级的目标网络切片组对应的频点优先级进行小区重选。示例性的，由步骤2可知最高优先级的目标网络切片组是SG2，根据SG2对应广播的频点(重选)优先级进行终端设备的小区重选。
作为实现示例四和实现示例五的一种可能的实现方式，实现示例四和实现示例五中的任一实现示例可以通过图11所示过程实现。其中，图11所示过程具体包括如下步骤。
B1.终端设备遍历Intended Slice。
B2.终端设备确定Intended Slice Group ID(s)＝包含Intended Slice数量最多的Slice Group(s)，并执行步骤B3。
B3.终端设备在Intended Slice Group ID关联的切片中找到最高优先级的切片并执行步骤B4。
B4.终端设备判断该切片对应的优先级是否相同？若是，则执行步骤B5，若否，则执行步骤B8。
B5.终端设备在步骤B5中确定该切片对应的优先级相同时，判断是否存在某一组SGx关联的切片先被遍历完？若是，执行步骤B7，若否，执行步骤B6。
B6.终端设备在步骤B5中确定不存在某一组SGx关联的切片先被遍历完时，在步骤B6中继续在剩余切片中找到最高优先级的切片，并执行步骤B4。
B7.终端设备在步骤B5中确定存在某一组SGx关联的切片先被遍历完时，该终端设备确定P(SGx)＜P(SGy)，并执行步骤B8。
B8.该终端设备确定最高优先级的切片所对应的优先级越高，对应的Intended Slice Group ID优先级越高。
B9.该终端设备按照最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选。
可选地，终端设备在步骤B9之前，可以接收来自网络设备的“用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选的指示信息”。在这种情况下，该终端设备在步骤B9的实现过程中，若基于最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选失败，则该终端设备还需要基于该指示信息进一步在第一小区频点执行小区重选。其中，该“指示信息”以及“第一小区频点”的多种实现方式可以参考前述描述，此处不做赘述。
可选的，当终端设备在步骤B9中确定网络切片与网络切片组之间的对应关系(该对应关系的实现过程可参考前述图2的描述，此处不再赘述)在终端设备当前所处的第一区域无效(或不适用、不适配等)时，该终端设备确定无法基于步骤B8所确定的最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选。此后，该终端设备可以基于包含有一个或多个默认网络切片的默认网络切片组对应的频点优先级进行小区重选，以提高小区重选的成功率。
作为一种实现示例，上述实现示例四至实现示例五的实现过程也可以通过图12a所示过程实现。如图12a所示，该过程包括如下步骤。
需要说明的是，在图12a所示实现示例中，以终端设备记为UE，网络设备包括接入网设备记为gNB和核心网设备记为CN为例进行说明。
1.CN通过gNB向UE发送NAS消息，该NAS消息包括Slice Group ID(S)和S-NSSAI(S)之间的对应关系、S-NSSAI(S)的优先级。
2.gNB向UE发送广播消息，该广播消息包括基于Slice Group ID的网络切片信息(Slice Info)，例如该Slice Info包括小区频点信息。
3.可选实现方式一(Opt#1)，UE的NAS层根据对应关系得到Intended Slice Group ID(S)。
3.可选实现方式二(Opt#2)，UE的AS层根据NAS层转发的对应关系得到Intended Slice Group ID(S)。
4.可选实现方式一(Opt#1)，UE的NAS层根据Intended Slice Group ID(S)中关联各个切片对应的优先级确定Intended Slice Group ID的优先级。
4.可选实现方式二(Opt#2)，UE的AS层根据NAS层转发的Intended Slice Group ID(S)中关联各个切片对应的优先级确定Intended Slice Group ID的优先级。
5.UE和gNB之间，按照最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选。
可选地，图12a所示过程还可以通过图12b所示过程实现，两者区别在于步骤2的实现过方式，其它步骤均相同。在图12b的步骤2中，该广播消息还可以包括“用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选的指示信息”。其中，该“指示信息”以及“第一小区频点”的多种实现方式可以参考前述描述，此处不做赘述。从而，在图12b所示步骤5中，在终端设备基于最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选失败的情况下，该终端设备可以基于该指示信息所指示的第一小区频点进行小区重选，以提升该终端设备的小区重选的成功率。
应理解，图12b中以该“指示信息”承载于步骤2中的广播消息作为示例进行描述，在实际应用中，该“指示信息”还可以承载于其它消息，例如RRC消息、MAC CE消息或DCI消息等，或者是其他的消息，此处不做限定。
从而，基于实现示例四和实现示例五的实现方案，不仅能减少系统开销和保证传输安全性，确定Slice Group ID的优先级以适配基于网络切片组的粒度进行小区重选方案以及MO触发的业务场景。
实现示例六：为前述实现方式三的一个实现示例。
在实现示例六中，假设终端设备确定目标网络切片为网络切片1，网络切片2和网络切片4(记为Intended Slice＝S1，S2，S4)，具体步骤如下所示。
步骤1、终端设备确定目标网络切片对应的目标网络切片组。
其中，终端设备的NAS层确定目标网络切片为S1，S2，S4，并且已知目标网络切片组与关联NSSAI的对应关系在当前PLMN内有效，则根据S1，S2，S4的S-NSSAI通过对应关系找到相应的目标网络切片组，即该终端设备确定目标网络切片组为网络切片组1，网络切片组2、网络切片组3和网络切片组4(即SG1，SG2，SG3，SG4)。
步骤2、根据终端设备存储在NAS中的历史使用的网络切片的信息确定目标网络切片组的优先级信息。
可选的，该终端设备在步骤1之后，在步骤2中可以基于目标网络切片组中的每一个网络切片组所包含的目标网络切片的数量进行筛选。其中，由于SG1，SG2，SG3和SG4所包含的目标网络切片(即S1，S2，S4)的数量为(2，2，2，1)。因此，该终端设备确定该目 标网络切片组需要排除部分选项(即排除SG4)。即该终端设备确定目标网络切片组经过筛选之后为网络切片组1，网络切片组2和网络切片组3(即SG1，SG2，SG3)。
可选的，上述终端设备确定目标网络切片组为网络切片组1，网络切片组2和网络切片组3的过程可以包括以下两种实现方式：
方式一、终端设备的NAS层根据目标网络切片即S1，S2，S4通过对应关系得到目标网络切片组为网络切片组1、网络切片组2和网络切片组3(记为Intended Slice Group ID(s)＝SG1，SG2，SG3)。
方式二、终端设备的NAS层将目标网络切片即S1，S2，S4的S-NSSAI和对应关系转发至AS层，然后在AS层再根据S1，S2，S4的S-NSSAI通过对应关系得到目标网络切片组为网络切片组1、网络切片组2和网络切片组3(记为Intended Slice Group ID(s)＝SG1，SG2，SG3)。
由上述过程可知，Intended Slice Group ID(s)＝SG1，SG2，SG3，本实施例中目标网络切片组的优先级可从终端设备根据存储在NAS中的历史使用的网络切片的信息(例如历史使用的网络切片的信息被使用次数，或记为被索引次数)中获取，比如被索引次数越多的目标网络切片组的优先级越高，若被索引次数相同则按照实施例1或者2中的方法进一步区分优先级。其优先级形式可以是对每一个目标网络切片组对应的优先级进行具体的赋值，也可以是按照一定规则进行排序后的目标网络切片组列表；
在本实施例中，由前置条件已知各目标网络切片组在NAS中被索引的次数满足N(SG4)<N(SG2)<N(SG3)<N(SG1)，则可得到目标网络切片组优先级按照从高到低可表示为列表＝{SG1，SG3，SG2}；
可选的，上述过程又可以分为两种实现方式：
方式一、终端设备的NAS层根据存储在NAS中的历史信息直接得到目标网络切片组的优先级。
方式二、终端设备的NAS层将存储在NAS中的历史信息转发至AS层，然后在AS层再根据上述信息得到目标网络切片组的优先级；
步骤3、终端设备按照步骤2得到的优先级信息进行小区重选。
可选的，终端设备在步骤3中，按照最高优先级的目标网络切片组对应的频点优先级进行小区重选。可选的，由步骤2可知最高优先级的目标网络切片组是SG1，根据SG1对应广播的频点(重选)优先级进行终端设备的小区重选。
作为一种实现示例，上述实现示例一和实现示例六的实现过程也可以通过图13a所示过程实现。如图13a所示，该过程包括如下步骤。
需要说明的是，在图13a所示实现示例中，以终端设备记为UE，网络设备包括接入网设备记为gNB和核心网设备记为CN为例进行说明。
1.CN通过gNB向UE发送NAS消息，该NAS消息包括Slice Group ID(S)和S-NSSAI(S)之间的对应关系、S-NSSAI(S)的优先级。
2.gNB向UE发送广播消息，该广播消息包括基于Slice Group ID的网络切片信息(Slice Info)，例如该Slice Info包括小区频点信息。
3.可选实现方式一(Opt#1)，UE的NAS层根据对应关系得到Intended Slice Group ID(S)。
3.可选实现方式二(Opt#2)，UE的AS层根据NAS层转发的对应关系得到Intended Slice Group ID(S)。
4.可选实现方式一(Opt#1)，UE的NAS层根据CN指定的Slice Group ID(S)优先级或者UE的历史信息确定Intended Slice Group ID的优先级。
4.可选实现方式二(Opt#2)，UE的AS层根据NAS层转发的CN指定的Slice Group ID(S)优先级或者UE的历史信息确定Intended Slice Group ID的优先级。
5.UE和gNB之间，按照最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选。
可选地，图13a所示过程还可以通过图13b所示过程实现，两者区别在于步骤2的实现过方式，其它步骤均相同。在图13b的步骤2中，该广播消息还可以包括“用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选的指示信息”。其中，该“指示信息”以及“第一小区频点”的多种实现方式可以参考前述描述，此处不做赘述。从而，在图13b所示步骤5中，在终端设备基于最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选失败的情况下，该终端设备可以基于该指示信息所指示的第一小区频点进行小区重选，以提升该终端设备的小区重选的成功率。
应理解，图13b中以该“指示信息”承载于步骤2中的广播消息作为示例进行描述，在实际应用中，该“指示信息”还可以承载于其它消息，例如RRC消息、MAC CE消息或DCI消息等，或者是其他的消息，此处不做限定。
从而，基于实现示例一和实现示例六的实现方案，不仅能减少系统开销和保证传输安全性，确定Slice Group ID的优先级以适配基于网络切片组的粒度进行小区重选方案以及MO触发的业务场景。
下面将结合图14所示通信场景，对上述实现方式二的(图7所示示例对应的)实现过程进行描述。
示例性的，在图14中，Cell 1为终端设备(记为UE)的驻留小区(Camping Cell)，Cell 2、Cell 3和小Cell 4为UE的候选小区。
对于Cell 1，支持的接入频点记为F1，支持的网络切片包括网络切片1(Slice 1)。
对于Cell 2，支持的接入频点记为F2，支持的网络切片包括网络切片2和网络切片4(Slice 2，4)。
对于Cell 3，支持的接入频点记为F3，支持的网络切片包括网络切片5(Slice5)。
对于Cell 4，支持的接入频点记为F4，支持的网络切片包括网络切片3(Slice 3)。
在图14所示场景中，不同网络切片组和多个网络切片之间根据小区实际部署情况确定(其中，每一个网络切片仅对应于某一个网络切片组，换言之，不同网络切片组所包含的网络切片不同)，例如：
网络切片组1对应网络切片1，记为：SG1＝{S1}。
网络切片组2对应网络切片2、切片4，记为：SG2＝{S2，S4}。
网络切片组3对应网络切片5，记为：SG3＝{S5}。
网络切片组4对应网络切片3，记为：SG4＝{S3}。
其中，上述四个小区处于同一个RA(或TA或PLMN区域)，换言之，上述分组的对应关系在四个小区内都是有效的。
此外，进一步假设网络切片优先级从低到高排序满足：
网络切片1、网络切片2、网络切片3、网络切片4和网络切片5，记为：P(S1)<P(S3)<P(S5)<P(S4)<P(S2)。
需要说明的是，下述实施示例七所涉及的步骤1，即为前述图2实施例中步骤S201的一种实现示例，下述实施示例七所涉及的步骤2记为前述图2实施例中步骤S202的一种实现示例。
实现示例七、为前述实现方式二(即前述图7所示实现过程)的一个实现示例。
在实现示例七中，假设终端设备确定目标网络切片为网络切片1、网络切片3和网络切片4(记为：Intended Slice＝S1，S3，S4)，具体步骤如下所示。
步骤1、终端设备确定最高优先级的目标网络切片对应的目标网络切片组。
终端设备的NAS层确定目标网络切片为S1，S3，S4，已知目标网络切片组与关联NSSAI的对应关系在当前PLMN内有效且存在一一对应的关系。由于目标网络切片的优先级排序满足P(S1)<P(S3)<P(S4)，则根据S4的S-NSSAI通过对应关系找到相应的目标网络切片组，即Intended Slice Group ID＝SG2。
可选的，上述过程又可以分为两种实现方式：
方式一、终端设备的NAS层根据目标网络切片即S1，S3，S4及其对应优先级通过对应关系得到目标网络切片组为网络切片组2(记为Intended Slice Group ID(s)＝SG2)。
方式二、终端设备的NAS层将目标网络切片即S1，S3，S4的S-NSSAI和对应关系及其对应优先级转发至AS层，然后在AS层再根据上述信息得到目标网络切片组为网络切片组2(记为Intended Slice Group ID(s)＝SG2)。
步骤2、终端设备按照步骤1确定的目标网络切片组进行小区重选。
可选的，终端设备在步骤2中，按照上述目标网络切片组对应的频点优先级进行小区重选。
可选的，由步骤1可知目标网络切片组是SG2，根据SG2对应广播的频点(重选)优先级进行终端设备的小区重选。
作为一种实现示例，上述实现示例七的实现过程也可以通过图15a所示过程实现。如图15a所示，该过程包括如下步骤。
需要说明的是，在图15a所示实现示例中，以终端设备记为UE，网络设备包括接入网设备记为gNB和核心网设备记为CN为例进行说明。
1.CN通过gNB向UE发送NAS消息，该NAS消息包括Slice Group ID(S)和S-NSSAI(S)之间的对应关系、S-NSSAI(S)的优先级。
2.gNB向UE发送广播消息，该广播消息包括基于Slice Group ID的网络切片信息(Slice Info)，例如该Slice Info包括小区频点信息。
3.可选实现方式一(Opt#1)，UE的NAS层根据对应关系和S-NSSAI(S)优先级得到Intended Slice Group ID(S)。
3.可选实现方式二(Opt#2)，UE的AS层根据NAS层转发的对应关系和S-NSSAI(S)优先级得到Intended Slice Group ID(S)。
4.UE和gNB之间，按照最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选。
可选地，图15a所示过程还可以通过图15b所示过程实现，两者区别在于步骤2的实现过方式，其它步骤均相同。在图15b的步骤2中，该广播消息还可以包括“用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选的指示信息”。其中，该“指示信息”以及“第一小区频点”的多种实现方式可以参考前述描述，此处不做赘述。从而，在图15b所示步骤4中，在终端设备基于最高优先级的Intended Slice Group ID对应的频点优先级进行小区重选失败的情况下，该终端设备可以基于该指示信息所指示的第一小区频点进行小区重选，以提升该终端设备的小区重选的成功率。
应理解，图15b中以该“指示信息”承载于步骤2中的广播消息作为示例进行描述，在实际应用中，该“指示信息”还可以承载于其它消息，例如RRC消息、MAC CE消息或DCI消息等，或者是其他的消息，此处不做限定。
从而，基于实施例七的实现方案，不仅能减少系统开销和保证传输安全性，确定Slice Group ID的优先级以适配基于网络切片组的粒度进行小区重选方案以及MO触发的业务场景。此外，若该对应关系在当前特定区域内有效且存在一一对应的关系，根据最高优先级的Intended Slice对应的S-NSSAI通过对应关系找到相应的Slice Group ID，无需进一步确定Intended Slice Group ID(s)的优先级，该Slice Group ID即为Intended Slice Group ID。
上面从方法的角度对本申请进行了说明，下面将对本申请所涉及的装置进行介绍。
请参阅图16，为本申请实施例提供的一种通信装置的实现示意图，该通信装置具体可以执行前述任一实施例中的终端设备所涉及的实现过程。
在一种实现方式中，该通信装置1600用于执行前述终端设备所涉及的小区重选的方法，该通信装置1600至少包括处理单元1601。
该处理单元1601，用于确定目标网络切片组的优先级信息，该优先级信息用于指示该目标网络切片组的优先级；
该处理单元1601，用于基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选。
在一种实现方式中，该通信装置1600用于执行前述终端设备所涉及的小区重选的方法，该通信装置1600至少包括处理单元1601。
该处理单元1601，用于确定目标网络切片组所关联的小区频点；
该处理单元1601，用于基于该目标网络切片组所关联的小区频点进行小区重选。
在一种可能的实现方式中，该目标网络切片组包括终端设备期望接入的网络切片。
在一种可能的实现方式中，该终端设备期望接入的网络切片包括以下至少一项：允许的NSSAI信元所指示的网络切片、请求的NSSAI信元所指示的网络切片、暂停的NSSAI信元所指示的网络切片或与移动发起流量业务相关的网络切片。
在一种可能的实现方式中，目标网络切片组包括默认网络切片。
在一种可能的实现方式中，目标网络切片组由网络切片与网络切片组之间的对应关系所确定，该网络切片与网络切片组之间的对应关系在终端设备当前所处的第一区域无效时，该目标网络切片组包括默认网络切片，其中，第一区域包括注册区域(registration area，RA)、跟踪区域(tracking area，TA)或公共陆地移动网(public land mobile network，PLMN)区域。
在一种可能的实现方式中，该装置还包括收发单元1602；该处理单元1601，用于确定目标网络切片组的优先级信息包括：
该处理单元1601，用于通过该收发单元1602接收来自网络设备的该优先级信息。
在一种可能的实现方式中，该处理单元1601，用于确定目标网络切片组的优先级信息包括：
该处理单元1601，用于基于历史使用的网络切片信息确定该优先级信息。
在一种可能的实现方式中，该优先级信息由目标网络切片组中的每一个网络切片组所包含的网络切片的数量和/或优先级信息确定。
在一种可能的实现方式中，该处理单元1601，用于基于该优先级信息所确定的该目标网络切片组所关联的小区频点进行小区重选包括：
该处理单元1601，用于基于该优先级信息所确定的目标小区频点进行小区重选，其中，该目标小区频点为该目标网络切片组中，优先级最高的网络切片组所关联的一个或多个小区频点。
在一种可能的实现方式中，该收发单元1602，还用于接收指示信息，该指示信息用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；其中，该第一小区频点包括以下至少一项：
网络切片集合所包含的一个或多个网络切片所关联的小区频点，该网络切片集合包括该终端设备期望接入的网络切片；或，
未与网络切片关联的小区频点；或，
网络切片组集合所包含的一个或多个网络切片组所关联的小区频点，该网络切片组集合包括该终端设备期望接入的网络切片对应的网络切片组；或，
未与网络切片组关联的小区频点；或，
该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点。
在一种可能的实现方式中，该指示信息包括以下至少一项：基于该第一小区频点进行小区重选的次数、基于该第一小区频点进行小区重选的时长、基于该第一小区频点进行小区重选的起始时刻或基于该第一小区频点进行小区重选的终止时刻。
在一种实现方式中，该通信装置1600用于执行前述网络设备所涉及的通信方法，该通信装置1600包括处理单元1601和收发单元1602。
该处理单元1601，用于确定目标网络切片组的优先级信息，该优先级信息用于指示该目标网络切片组的优先级；
该收发单元1602，用于发送该优先级信息。
在一种可能的实现方式中，该收发单元1602，还用于发送指示信息，该指示信息用于指示基于该目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；其中，该第一小区频点包括以下至少一项：
网络切片集合所包含的一个或多个网络切片所关联的小区频点，该网络切片集合包括该终端设备期望接入的网络切片；或，
未与网络切片关联的小区频点；或，
网络切片组集合所包含的一个或多个网络切片组所关联的小区频点，该网络切片组集合包括该终端设备期望接入的网络切片对应的网络切片组；或，
未与网络切片组关联的小区频点；或，
该优先级信息所指示的该目标网络切片组中除了该优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点。
在一种可能的实现方式中，该指示信息包括以下至少一项：基于该第一小区频点进行小区重选的次数、基于该第一小区频点进行小区重选的时长、基于该第一小区频点进行小区重选的起始时刻或基于该第一小区频点进行小区重选的终止时刻。
需要说明的是，上述通信装置1600的单元的信息执行过程等内容，具体可参见本申请前述所示的方法实施例中的叙述，此处不再赘述。
请参阅图17，为本申请的实施例提供的上述实施例中所涉及的通信装置。该通信装置1700可以为前述任一实施例所示的终端设备，或者，该通信装置1700可以为前述任一实施例所示的终端设备中的部分组件(例如处理器、芯片或芯片系统等)。
在图17中，该通信装置1700的一种可能的逻辑结构示意图，该通信装置1700可以包括但不限于至少一个处理器1701以及通信端口1702。进一步可选的，该装置还可以包括存储器1703、总线1704，在本申请的实施例中，该至少一个处理器1701用于对通信装置1700的动作进行控制处理。
示例性的，该通信装置1700可以用于执行前述图2至图15b所示实施例中任一实施例所描述的方法。以图2为例，该通信装置1700可以在步骤S201中确定目标网络切片组的优先级信息，该通信装置1700还可以在步骤S202中基于优先级信息所确定的目标网络切片组所关联的小区频点进行小区重选。
此外，处理器1701可以是中央处理器单元，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、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。该处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。所属领域的技术人员可以清楚地了解到，为描述的方 便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
需要说明的是，图17所示通信装置1700具体可以用于实现前述对应方法实施例中终端设备所实现的其它步骤，并实现终端设备对应的技术效果，图17所示通信装置1700的具体实现方式，均可以参考前述各个方法实施例中的叙述，此处不再一一赘述。
请参阅图18，为本申请的实施例提供的上述实施例中所涉及的网络设备或网络设备中的部分组件(例如处理器、芯片或芯片系统等)的结构示意图。在下文中，以图18所示结构示例图为网络设备的结构示意图为例进行说明。
例如，该网络设备可以包括接入网设备或核心网设备。
示例性的，图18所示网络设备的结构示意图可以用于执行前述图2至图15b所示实施例中任一实施例所描述的方法。以图4为例，该网络设备可以在步骤S401中向终端设备发送第一指示信息。
如图18所示，网络设备包括至少一个处理器1811。可选的，该网络设备还可以包括目标网络接口1814。
进一步可选的，该网络设备还包括目标存储器1812、目标收发器1813和一个或多个天线1815。处理器1811、存储器1812、收发器1813和网络接口1814相连，例如通过总线相连，在本申请实施例中，该连接可包括各类接口、传输线或总线等，本实施例对此不做限定。天线1815与收发器1813相连。网络接口1814用于使得网络设备通过通信链路，与其它通信设备通信。例如网络接口1814可以包括网络设备与核心网设备之间的网络接口，例如S1接口，网络接口可以包括网络设备和其他网络设备(例如其他网络设备或者核心网设备)之间的网络接口，例如X2或者Xn接口。
处理器1811主要用于对通信协议以及通信数据进行处理，以及对整个网络设备进行控制，执行软件程序，处理软件程序的数据，例如用于支持网络设备执行实施例中所描述的动作。网络设备可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。图18中的处理器1811可以集成基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端设备可以包括多个基带处理器以适应不同的网络制式，终端设备可以包括多个中央处理器以增强其处理能力，终端设备的各个部件可以通过各种总线连接。该基带处理器也可以表述为基带处理电路或者基带处理芯片。该中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储器中，由处理器执行软件程序以实现基带处理功能。
存储器主要用于存储软件程序和数据。存储器1812可以是独立存在，与处理器1811相连。可选的，存储器1812可以和处理器1811集成在一起，例如集成在一个芯片之内。其中，存储器1812能够存储执行本申请实施例的技术方案的程序代码，并由处理器1811来控制执行，被执行的各类计算机程序代码也可被视为是处理器1811的驱动程序。
图18仅示出了一个存储器和一个处理器。在实际的终端设备中，可以存在多个处理器和多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以为与处理器处于同一芯片上的存储元件，即片内存储元件，或者为独立的存储元件，本申请实施例对此不做限定。
收发器1813可以用于支持网络设备与终端之间射频信号的接收或者发送，收发器1813可以与天线1815相连。收发器1813包括发射机Tx和接收机Rx。具体地，一个或多个天线1815可以接收射频信号，该收发器1813的接收机Rx用于从天线接收该射频信号，并将射频信号转换为数字基带信号或数字中频信号，并将该数字基带信号或数字中频信号提供给该处理器1811，以便处理器1811对该数字基带信号或数字中频信号做进一步的处理，例如解调处理和译码处理。此外，收发器1813中的发射机Tx还用于从处理器1811接收经过调制的数字基带信号或数字中频信号，并将该经过调制的数字基带信号或数字中频信号转换为射频信号，并通过一个或多个天线1815发送该射频信号。具体地，接收机Rx可以选择性地对射频信号进行一级或多级下混频处理和模数转换处理以得到数字基带信号或数字中频信号，该下混频处理和模数转换处理的先后顺序是可调整的。发射机Tx可以选择性地对经过调制的数字基带信号或数字中频信号时进行一级或多级上混频处理和数模转换处理以得到射频信号，该上混频处理和数模转换处理的先后顺序是可调整的。数字基带信号和数字中频信号可以统称为数字信号。
收发器也可以称为收发单元、收发机、收发装置等。可选的，可以将收发单元中用于实现接收功能的器件视为接收单元，将收发单元中用于实现发送功能的器件视为发送单元，即收发单元包括接收单元和发送单元，接收单元也可以称为接收机、输入口、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
需要说明的是，图18所示网络设备具体可以用于实现前述方法实施例中网络设备所实现的步骤，并实现网络设备对应的技术效果，图18所示网络设备的具体实现方式，均可以参考前述的各个方法实施例中的叙述，此处不再一一赘述。
本申请实施例还提供一种存储一个或多个计算机执行指令的计算机可读存储介质，当计算机执行指令被处理器执行时，该处理器执行如前述实施例中终端设备可能的实现方式所述的方法。
本申请实施例还提供一种存储一个或多个计算机执行指令的计算机可读存储介质，当计算机执行指令被处理器执行时，该处理器执行如前述实施例中网络设备可能的实现方式所述的方法。
本申请实施例还提供一种存储一个或多个计算机的计算机程序产品(或称计算机程序)，当计算机程序产品被该处理器执行时，该处理器执行上述终端设备可能实现方式的方法。
本申请实施例还提供一种存储一个或多个计算机的计算机程序产品，当计算机程序产品被该处理器执行时，该处理器执行上述网络设备可能实现方式的方法。
本申请实施例还提供了一种芯片系统，该芯片系统包括至少一个处理器，用于支持终端设备实现上述终端设备可能的实现方式中所涉及的功能。可选的，所述芯片系统还包括 接口电路，所述接口电路为所述至少一个处理器提供程序指令和/或数据。在一种可能的设计中，该芯片系统还可以包括存储器，存储器，用于保存该终端设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件。
本申请实施例还提供了一种芯片系统，该芯片系统包括至少一个处理器，用于支持网络设备实现上述网络设备可能的实现方式中所涉0及的功能。可选的，所述芯片系统还包括接口电路，所述接口电路为所述至少一个处理器提供程序指令和/或数据。在一种可能的设计中，芯片系统还可以包括存储器，存储器，用于保存该网络设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件，其中，该网络设备具体可以为前述前述方法实施例中网络设备。
本申请实施例还提供了一种通信系统，该网络系统架构包括上述任一实施例中的终端设备和网络设备。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。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。所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请实施例的具体实施方式，但本申请实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请实施例的保护范围之内。因此，本申请实施例的保护范围应以所述权利要求的保护范围为准。

Claims (33)

  1. 一种小区重选的方法，其特征在于，包括：
    终端设备确定目标网络切片组的优先级信息，所述优先级信息用于指示所述目标网络切片组的优先级；
    所述终端设备基于所述优先级信息所确定的所述目标网络切片组所关联的小区频点进行小区重选。
  2. 根据权利要求1所述的方法，其特征在于，所述目标网络切片组包括所述终端设备期望接入的网络切片。
  3. 根据权利要求2所述的方法，其特征在于，所述终端设备期望接入的网络切片包括以下至少一项：
    允许的网络切片选择辅助信息NSSAI信元所指示的网络切片、请求的NSSAI信元所指示的网络切片、暂停的NSSAI信元所指示的网络切片或与移动发起流量业务相关的网络切片。
  4. 根据权利要求1所述的方法，其特征在于，所述目标网络切片组包括默认网络切片。
  5. 根据权利要求4所述的方法，其特征在于，所述目标网络切片组由网络切片与网络切片组之间的对应关系所确定，所述网络切片与网络切片组之间的对应关系在所述终端设备当前所处的第一区域无效时，所述目标网络切片组包括所述默认网络切片；其中，所述第一区域包括注册区域RA、跟踪区域TA或公共陆地移动网PLMN区域。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述方法还包括：
    根据如下之一，确定所述目标网络切片组：
    所述终端设备的非接入层NAS根据所述终端设备期望接入的网络切片的标识、以及网络切片与网络切片组之间的对应关系，确定所述目标网络切片组；或，
    所述终端设备的NAS将所述终端设备期望接入的网络切片的标识、网络切片与网络切片组之间的对应关系发送给所述终端设备的AS，所述终端设备的AS根据所述网络切片的标识以及所述对应关系，确定所述目标网络切片组。
  7. 根据权利要求1至6任一项所述的方法，其特征在于，所述终端设备确定目标网络切片组的优先级信息包括：
    所述终端设备接收来自网络设备的所述优先级信息。
  8. 根据权利要求7所述的方法，其特征在于，所述优先级信息承载于NAS消息。
  9. 根据权利要求1至8任一项所述的方法，其特征在于，所述方法还包括：
    根据如下之一，确定目标网络切片组的优先级信息：
    所述终端设备的NAS接收来自所述网络设备的网络切片组的优先级信息，所述终端设备的NAS根据所述目标网络切片组以及所述网络切片组的优先级信息确定所述目标网络切片组的优先级信息；或，
    所述终端设备的NAS接收来自所述网络设备的网络切片组的优先级信息，并发送给所述终端设备的AS，所述终端设备的AS根据所述目标网络切片组以及所述网络切片组的优先级信息确定所述目标网络切片组的优先级信息。
  10. 根据权利要求1至9任一项所述的方法，其特征在于，所述终端设备确定目标网络切片组的优先级信息包括：
    所述终端设备基于历史使用的网络切片的信息确定所述优先级信息。
  11. 根据权利要求1至10任一项所述的方法，其特征在于，
    所述优先级信息由所述目标网络切片组中的每一个网络切片组所包含的网络切片的数量和/或优先级信息确定。
  12. 根据权利要求1至11任一项所述的方法，其特征在于，所述终端设备基于所述优先级信息所确定的所述目标网络切片组所关联的小区频点进行小区重选包括：
    所述终端设备基于目标小区频点进行小区重选，其中，所述目标小区频点为所述优先级信息所指示的所述目标网络切片组中优先级最高的网络切片组所关联的一个或多个小区频点。
  13. 根据权利要求12所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自所述网络设备的指示信息，所述指示信息用于指示基于所述目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；
    其中，所述第一小区频点包括以下至少一项：
    网络切片集合所包含的一个或多个网络切片所关联的小区频点，所述网络切片集合包括所述终端设备期望接入的网络切片；或，
    未与网络切片关联的小区频点；或，
    网络切片组集合所包含的一个或多个网络切片组所关联的小区频点，所述网络切片组集合包括所述终端设备期望接入的网络切片对应的网络切片组；或，
    未与网络切片组关联的小区频点；或，
    所述优先级信息所指示的所述目标网络切片组中除了所述优先级最高的网络切片组之外的一个或多个网络切片组所关联的小区频点。
  14. 根据权利要求13所述的方法，其特征在于，所述指示信息包括以下至少一项：
    基于所述第一小区频点进行小区重选的次数、基于所述第一小区频点进行小区重选的时长、基于所述第一小区频点进行小区重选的起始时刻或基于所述第一小区频点进行小区重选的终止时刻。
  15. 一种小区重选的方法，其特征在于，包括：
    网络设备确定目标网络切片组的优先级信息，所述优先级信息用于指示所述目标网络切片组的优先级；
    所述网络设备向终端设备发送所述优先级信息。
  16. 一种通信装置，其特征在于，包括处理单元；
    所述处理单元，用于确定目标网络切片组的优先级信息，所述优先级信息用于指示所述目标网络切片组的优先级；
    所述处理单元，用于基于所述优先级信息所确定的所述目标网络切片组所关联的小区频点进行小区重选。
  17. 根据权利要求16所述的装置，其特征在于，所述目标网络切片组包括终端设备期望接入的网络切片。
  18. 根据权利要求17所述的装置，其特征在于，所述终端设备期望接入的网络切片包括以下至少一项：
    允许的网络切片选择辅助信息NSSAI信元所指示的网络切片、请求的NSSAI信元所指示的网络切片、暂停的NSSAI信元所指示的网络切片或与移动发起流量业务相关的网络切片。
  19. 根据权利要求16所述的装置，其特征在于，所述目标网络切片组包括默认网络切片。
  20. 根据权利要求19所述的装置，其特征在于，所述目标网络切片组由网络切片与网络切片组之间的对应关系所确定，所述网络切片与网络切片组之间的对应关系在所述终端设备当前所处的第一区域无效时，所述目标网络切片组包括所述默认网络切片；其中，所述第一区域包括注册区域RA、跟踪区域TA或公共陆地移动网PLMN区域。
  21. 根据权利要求16至19任一项所述的装置，其特征在于，
    所述处理单元，用于控制所述通信装置对应的终端设备的非接入层NAS根据所述终端设备期望接入的网络切片的标识、以及网络切片与网络切片组之间的对应关系，确定所述目标网络切片组；或，
    所述处理单元，用于控制所述通信装置对应的终端设备的NAS将所述终端设备期望接 入的网络切片的标识、网络切片与网络切片组之间的对应关系发送给所述通信装置对应的终端设备的AS，所述AS根据所述网络切片的标识以及所述对应关系，确定所述目标网络切片组。
  22. 根据权利要求16至21任一项所述的装置，其特征在于，所述装置还包括收发单元；所述处理单元，用于确定目标网络切片组的优先级信息包括：
    所述处理单元，用于通过所述收发单元接收来自网络设备的所述优先级信息。
  23. 根据权利要求22所述的装置，其特征在于，所述优先级信息承载于NAS消息。
  24. 根据权利要求16至23任一项所述的装置，其特征在于，
    所述处理单元，用于控制所述通信装置对应的终端设备的NAS接收来自所述网络设备的网络切片组的优先级信息，所述终端设备的NAS根据所述目标网络切片组以及所述网络切片组的优先级信息确定所述目标网络切片组的优先级信息；或，
    所述处理单元，用于控制所述通信装置对应的终端设备的NAS接收来自所述网络设备的网络切片组的优先级信息，并发送给所述通信装置对应的所述终端设备的AS，所述终端设备的AS根据所述目标网络切片组以及所述网络切片组的优先级信息确定所述目标网络切片组的优先级信息。
  25. 根据权利要求16至24任一项所述的装置，其特征在于，所述处理单元，用于确定目标网络切片组的优先级信息包括：
    所述处理单元，用于基于历史使用的网络切片的信息确定所述优先级信息。
  26. 根据权利要求16至25任一项所述的装置，其特征在于，所述处理单元，具体用于：
    基于目标小区频点进行小区重选，其中，所述目标小区频点为所述优先级信息所指示的所述目标网络切片组中优先级最高的网络切片组所关联的一个或多个小区频点。
  27. 根据权利要求26所述的装置，其特征在于，所述收发单元，还用于：
    接收来自所述网络设备的指示信息，所述指示信息用于指示基于所述目标小区频点进行小区重选失败之后，基于第一小区频点对应的频点优先级进行小区重选；
    其中，所述第一小区频点包括以下至少一项：
    网络切片集合所包含的一个或多个网络切片所关联的小区频点，所述网络切片集合包括所述终端设备期望接入的网络切片；或，
    未与网络切片关联的小区频点；或，
    网络切片组集合所包含的一个或多个网络切片组所关联的小区频点，所述网络切片组集合包括所述终端设备期望接入的网络切片对应的网络切片组；或，
    未与网络切片组关联的小区频点；或，
    所述优先级信息所指示的所述目标网络切片组中除了所述优先级最高的网络切片组之外的其他网络切片组所关联的一个或多个小区频点。
  28. 根据权利要求27所述的装置，其特征在于，所述指示信息包括以下至少一项：
    基于所述第一小区频点进行小区重选的次数、基于所述第一小区频点进行小区重选的时长、基于所述第一小区频点进行小区重选的起始时刻或基于所述第一小区频点进行小区重选的终止时刻。
  29. 一种通信装置，其特征在于，包括处理单元和收发单元；
    所述处理单元，用于确定目标网络切片组的优先级信息，所述优先级信息用于指示所述目标网络切片组的优先级；
    所述收发单元，用于发送所述优先级信息。
  30. 一种通信装置，其特征在于，所述通信装置包括：
    存储器，用于存储计算机指令；
    处理器，用于执行所述存储器中存储的计算机程序或计算机指令，使得所述通信装置执行如权利要求1至14中任一项所述的方法。
  31. 一种通信装置，其特征在于，所述通信装置包括：
    存储器，用于存储计算机指令；
    处理器，用于执行所述存储器中存储的计算机程序或计算机指令，使得所述通信装置执行如权利要求15所述的方法。
  32. 一种计算机可读存储介质，其特征在于，所述介质存储有指令，当所述指令被计算机执行时，实现权利要求1至14中任一项所述的方法。
  33. 一种计算机可读存储介质，其特征在于，所述介质存储有指令，当所述指令被计算机执行时，实现权利要求15所述的方法。
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