WO2021238692A1 - 通信方法和通信装置 - Google Patents

通信方法和通信装置 Download PDF

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Publication number
WO2021238692A1
WO2021238692A1 PCT/CN2021/094053 CN2021094053W WO2021238692A1 WO 2021238692 A1 WO2021238692 A1 WO 2021238692A1 CN 2021094053 W CN2021094053 W CN 2021094053W WO 2021238692 A1 WO2021238692 A1 WO 2021238692A1
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WIPO (PCT)
Prior art keywords
network slice
information
terminal device
service
network
Prior art date
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PCT/CN2021/094053
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English (en)
French (fr)
Inventor
孙飞
罗海燕
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21812274.5A priority Critical patent/EP4152881A4/en
Publication of WO2021238692A1 publication Critical patent/WO2021238692A1/zh
Priority to US17/993,946 priority patent/US20230086410A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0895—Configuration of virtualised networks or elements, e.g. virtualised network function or OpenFlow elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H04L67/141—Setup of application sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel

Definitions

  • the embodiments of the present application relate to the field of communication, and more specifically, to communication methods and communication devices.
  • a terminal device when a terminal device needs to access a certain service, it can initiate a session of the service, for example, a protocol data unit (PDU) session, and the session establishment request can carry the network corresponding to the service The identification of the slice.
  • PDU protocol data unit
  • the network device can configure resources for the terminal device according to the identifier of the network slice carried in the PDU session.
  • the session connection cannot be established based on the session establishment request, resulting in the transmission of the network slice. Waste of resources requested for session establishment.
  • the present application provides a communication method and a communication device, which can reduce resource waste.
  • a communication method including: a terminal device receives first information, where the first information is used to indicate at least one supported network slice, and the at least one supported network slice includes a network slice supported by a first cell And/or a network slice supported by a first access device, where the first cell includes the cell currently accessed by the terminal device, and the first access device includes the access device currently accessed by the terminal device; The terminal device receives second information, where the second information is used to indicate at least one allowed network slice; the terminal device processes the session establishment request of the first service according to the first information and the second information.
  • the terminal device by enabling the terminal device to obtain the first information of the currently accessed cell or the network slice supported by the access device, and the information of the allowed network slice of the terminal device, the terminal device can pre-determine the current access Information about whether the network slice of the service belongs to the cell currently accessed or the network slice supported by the access device and the allowed network slice, so that the terminal device can process the session establishment request according to the determination result, thereby reducing the waste of resources.
  • the terminal device processes the session establishment request of the first service according to the first information and the second information, including: if the first network slice belongs to the at least one supported network slice, and the first network slice If it belongs to the at least one allowed network slice, a session establishment request for a first service is sent, where the first network slice includes a network slice corresponding to the first service.
  • the session of the first service can be carried on the first network slice, or in other words, it can be ensured that the network device can configure resources for the terminal device based on the session establishment request and according to the identifier of the first network slice.
  • the session establishment request of the first service is stopped.
  • the terminal device cannot access the service #1 through the network slice #1, by stopping sending the session establishment request, the waste of resources for transmitting the session establishment request can be avoided.
  • third information is sent, and the third information is used to indicate At least one of the following: the first service supports or does not support network slice remapping, the first service supports or does not support network slice fallback, the terminal device supports or does not support cell redirection, and at least one second cell Information about at least one second access device, information about at least one second network slice, wherein the second cell supports the first network slice, and the second access device supports the first network A slice, the second network slice belongs to the supported network slice.
  • the network device may determine whether to use the network slice remapping according to the third indication information.
  • the first service is remapped to other network slices (for example, the third network slice) for processing.
  • the third network slice belongs to an allowed network slice, and the third network slice belongs to a network slice supported by the first cell or the first access device.
  • the network device may determine according to the third indication information whether to remap the first service to the network slice that needs to fall back to ( For example, the fourth network slice).
  • the fourth network slice may be a network slice pre-configured by the network device for the terminal device to be used for network slice fallback processing, or in other words, the fourth network slice may be a network slice pre-configured by the network device for the terminal device.
  • the rollback process is the target network slice that needs to be rolled back to.
  • the third network slice belongs to a network slice supported by the first cell or the first access device.
  • the network device may determine whether to use the method of redirecting the terminal device to another cell (for example, a third cell) according to the third indication information. Way to deal with it.
  • the third cell supports the first network slice.
  • the network device may redirect the terminal device to The second cell.
  • the terminal device can use the first network slice to access the first service through the second cell, thereby reducing the time delay for the terminal device to access the first service.
  • the network device may configure the terminal according to the third indication information The device is redirected to the second access device.
  • the terminal device can use the first network slice to access the first service through the second access device, thereby reducing the access delay of the terminal device to the first service.
  • the network device may assign the first service to the network slice according to the third indication information. Remap to the second network slice.
  • the terminal device can use the second network slice to access the first service through the first access device, thereby reducing the access delay of the terminal device to the first service.
  • the terminal device receiving the first information includes: the access AS layer of the terminal device receives the first information;
  • the receiving of the second information by the terminal device includes: the non-access NAS layer of the terminal device receives the second information.
  • the method further includes: the AS layer of the terminal device sends information about at least one supported network slice to the NAS layer of the terminal device; the NAS layer of the terminal device determines whether the first network slice belongs to all The at least one supported network slice, wherein the first network slice includes a network slice corresponding to the first service; the NAS layer of the terminal device determines whether the first network slice belongs to the at least one allowed network slice.
  • the NAS layer may generate a session establishment request for the first service and transfer the first service
  • the session establishment request for the first service is sent to the AS layer, and the AS layer may send the session establishment request for the first service (for example, through the access network device) to the core network device.
  • the NAS layer may not generate a session establishment request for the first service, Alternatively, the NAS layer may stop sending the session establishment request of the first service to the AS layer.
  • the NAS layer may generate a session establishment request for the first service, where, The session establishment request carries the aforementioned third information, and sends the session establishment request of the first service to the AS layer, and the AS layer may send the session establishment request of the first service (for example, through the access network device) to the core network device .
  • the processing load of the AS layer can be reduced.
  • the method further includes: the NAS layer of the terminal device sends information of the first network slice to the AS layer of the terminal device, where the first network slice includes the network corresponding to the first service Slice; when the first network slice belongs to the at least one allowed network slice, the NAS layer of the terminal device sends the session establishment request of the first service to the AS layer of the terminal device; when the first network When the slice belongs to the at least one supported network slice, the AS layer of the terminal device sends a session establishment request of the first service.
  • the AS layer may send a session establishment request for the first service (for example, through an access network device) to the core network device.
  • the AS layer may stop sending the session establishment request for the first service.
  • the AS layer may send feedback information to the NAS layer, and the NAS layer may no longer generate a session establishment request for the first service according to the feedback information, or, The NAS layer may stop sending the session establishment request of the first service to the AS layer.
  • the AS layer may send feedback information to the NAS layer, and the NAS layer may generate a session establishment request for the first service based on the feedback information, where the session The establishment request carries the aforementioned third information, and sends the session establishment request of the first service to the AS layer, and the AS layer may send the session establishment request of the first service (for example, through an access network device) to the core network device.
  • the method further includes: the NAS layer of the terminal device sends information of the first network slice to the AS layer of the terminal device, where the first network slice includes the network corresponding to the first service slice.
  • the NAS layer of the terminal device sends a session establishment request of the first service to the AS layer of the terminal device.
  • the AS layer of the terminal device sends feedback information to the NAS layer of the terminal device, and the feedback information is used to indicate that the first network slice does not belong to all Describes at least one supported network slice.
  • the NAS layer may no longer generate the session establishment request for the first service according to the feedback information, or the NAS layer may stop sending the session establishment request for the first service to the AS layer
  • the NAS layer may generate a session establishment request for the first service based on the feedback information, where the session establishment request carries the aforementioned third information, and sends the session establishment request for the first service to the AS layer, and the AS layer may The session establishment request of the first service (for example, through the access network device) is sent to the core network device.
  • the method further includes: the NAS layer of the terminal device sends information of the first network slice to the AS layer of the terminal device, where the first network slice includes the network corresponding to the first service Slicing; the NAS layer of the terminal device sends at least one permitted network slice information to the AS layer of the terminal device; the NAS layer of the terminal device sends the first service session to the AS layer of the terminal device Create request.
  • the AS layer of the terminal device sends the session establishment request of the first service.
  • the AS layer of the terminal device sends to the NAS layer of the terminal device Feedback information, where the feedback information is used to indicate that the first network slice does not belong to the at least one supported network slice.
  • the NAS layer may no longer generate the session establishment request for the first service according to the feedback information, or the NAS layer may stop sending the session establishment request for the first service to the AS layer
  • the NAS layer may generate a session establishment request for the first service based on the feedback information, where the session establishment request carries the aforementioned third information, and sends the session establishment request for the first service to the AS layer, and the AS layer may The session establishment request of the first service (for example, through the access network device) is sent to the core network device.
  • the processing load of the NAS layer can be reduced.
  • a communication method including: a core network device obtains indication information, where the indication information is used to indicate at least one of the following: the first service corresponding to the terminal device supports or does not support network slice remapping, and the first service A service supports or does not support network slice fallback, the terminal device supports or does not support cell redirection, information about at least one second cell, information about at least one second access device, and information about at least one second network slice, Wherein, the second cell supports the first network slice, the second access device supports the first network slice, and the second network slice belongs to the supported network slice; the core network device is based on The instruction information communicates with the terminal device.
  • the core network device by enabling the core network device to obtain the above-mentioned indication information, it can be based on the indication information when the cell currently accessed by the terminal device or the access device does not support the first network slice corresponding to the first service that the terminal requests to access , Control terminal equipment, reduce resource overhead.
  • acquiring the indication information by the core network device includes: the core network device receives the indication information from the terminal device.
  • the terminal device may determine whether the currently accessed cell or the access device supports the first network slice, and when it is determined that it does not support the first network slice, the indication information is sent.
  • the terminal device may not make the above determination and directly send the instruction information to the core network device.
  • the foregoing indication information may be stored as network slice subscription information of the terminal device in, for example, a network device such as a unified data management (UDM) network element.
  • a network device such as a unified data management (UDM) network element.
  • UDM unified data management
  • the core network device can obtain the indication information from a network device such as UDM.
  • the core network device may also determine whether the currently accessed cell or the access device supports the first network slice, and when it is determined that it does not support the first network slice, it controls the terminal device according to the foregoing indication information.
  • the core network device may adopt different processing methods according to the specific content indicated by the instruction information.
  • the core network device communicating with the terminal device according to the instruction information includes:
  • the core network device communicates with the terminal device according to the first processing mode.
  • the multiple processing methods include the following at least two processing methods:
  • Manner 1 Perform network slice remapping on the first service
  • the network device may determine whether to use the network slice remapping according to the third indication information.
  • the first service is remapped to other network slices (for example, the third network slice) for processing.
  • the third network slice belongs to an allowed network slice, and the third network slice belongs to a network slice supported by the first cell or the first access device.
  • the core network device may determine, according to the third indication information, whether to remap the first service to the network slice that needs to fall back to ( For example, the fourth network slice).
  • the fourth network slice may be a network slice pre-configured by the network device for the terminal device to be used for network slice fallback processing, or in other words, the fourth network slice may be a network slice pre-configured by the network device for the terminal device.
  • the rollback process is the target network slice that needs to be rolled back to.
  • the third network slice belongs to a network slice supported by the first cell or the first access device.
  • the core network device may determine whether to use the method of redirecting the terminal device to another cell (for example, a third cell) according to the third indication information. Way to deal with it.
  • the third cell supports the first network slice.
  • the core network device may redirect the terminal device to The second cell.
  • the terminal device can use the first network slice to access the first service through the second cell, thereby reducing the time delay for the terminal device to access the first service.
  • the core network device may send the terminal to the terminal according to the third indication information. The device is redirected to the second access device.
  • the terminal device can use the first network slice to access the first service through the second access device, thereby reducing the access delay of the terminal device to the first service.
  • the core network device may transfer the first service to the network slice according to the third indication information. Remap to the second network slice.
  • the terminal device can use the second network slice to access the first service through the first access device, thereby reducing the access delay of the terminal device to the first service.
  • the core network device determines the first processing method that conforms to the situation indicated by the instruction information from multiple processing methods according to the instruction information, including: the core network device determines the first processing method according to the instruction information and the instruction information. The priority of each of the multiple processing methods determines the first processing method.
  • the indication information is carried in the session establishment request of the first service.
  • a communication method including: a terminal device generates indication information, the indication information is used to indicate at least one of the following: the first service corresponding to the terminal device supports or does not support network slice remapping, The first service supports or does not support network slice fallback, the terminal device supports or does not support cell redirection, information about at least one second cell, information about at least one second access device, and information about at least one second network slice , Wherein the second cell supports the first network slice, the second access device supports the first network slice, and the second network slice belongs to the supported network slice; the terminal device sends The instruction information.
  • the terminal device by enabling the terminal device to send the above-mentioned instruction information to the core network device, it is possible to use the first network slice corresponding to the first service that the terminal device requests to access when the cell currently accessed by the terminal device or the access device does not support
  • the instruction information controls the terminal equipment and reduces resource overhead.
  • the method before the terminal device sends the indication information, the method further includes:
  • the terminal device receives first information, where the first information is used to indicate at least one supported network slice, and the at least one supported network slice includes the network slice supported by the first cell and/or the network slice supported by the first access device
  • the first cell includes a cell currently accessed by the terminal device
  • the first access device includes an access device currently accessed by the terminal device
  • the first network slice does not belong to the supported network slice.
  • the indication information is carried in the session establishment request of the first service.
  • a communication device including: a transceiving unit, configured to receive first information, where the first information is used to indicate at least one supported network slice, and the at least one supported network slice includes the first cell support And/or a network slice supported by a first access device, where the first cell includes a cell currently accessed by a terminal device, and the first access device includes an access device currently accessed by the terminal device;
  • the terminal device receives second information, the second information is used to indicate at least one allowed network slice;
  • the processing unit is used to process the session establishment request of the first service according to the first information and the second information .
  • the terminal device by enabling the terminal device to obtain the first information of the currently accessed cell or the network slice supported by the access device, and the information of the allowed network slice of the terminal device, the terminal device can pre-determine the current access Whether the network slice of the service belongs to the cell currently accessed or the network slice supported by the access device and the information of the allowed network slice, so that the terminal device can process the session establishment request according to the determination result, thereby reducing the service access delay. Reduce resource overhead.
  • the processing unit is specifically configured to send a session establishment request for the first service if the first network slice belongs to the at least one supported network slice, and the first network slice belongs to the at least one allowed network slice, where ,
  • the first network slice includes a network slice corresponding to the first service.
  • the processing unit is specifically configured to stop the session of the first service if the first network slice does not belong to the at least one supported network slice, or the first network slice does not belong to the at least one allowed network slice Create request.
  • the processing unit is configured to send third information if the first network slice does not belong to the at least one supported network slice, or the first network slice does not belong to the at least one allowed network slice, the The third information is used to indicate at least one of the following: the first service supports or does not support network slice remapping, the first service supports or does not support network slice fallback, and the terminal device supports or does not support cell redirection , Information of at least one second cell, information of at least one second access device, and information of at least one second network slice, wherein the second cell supports the first network slice, and the second access device The first network slice is supported, and the second network slice belongs to the supported network slice.
  • the transceiver unit includes an access AS layer processing unit and a non-access NAS layer processing unit.
  • the AS layer processing unit is configured to acquire and parse the first information from the transceiving unit
  • the NAS layer processing unit is configured to acquire and parse the second information from the transceiving unit.
  • the AS layer processing unit is configured to send information about at least one supported network slice to the NAS layer processing unit, and the NAS layer processing unit is configured to determine whether the first network slice belongs to the at least one supported network slice.
  • Network slicing wherein the first network slice includes a network slice corresponding to the first service; the NAS layer of the terminal device determines whether the first network slice belongs to the at least one allowed network slice.
  • the NAS layer processing unit is specifically configured to generate a session of the first service if the first network slice belongs to the at least one supported network slice, and the first network slice belongs to the at least one allowed network slice Establish a request, and send a session establishment request of the first service to the AS layer processing unit, and the AS layer processing unit is used to control the transceiver to request the session establishment of the first service (for example, through an access network). Equipment) sent to the core network equipment.
  • the NAS layer processing unit is configured to not generate the first network slice if the first network slice does not belong to the at least one supported network slice, and/or the first network slice belongs to the at least one allowed network slice
  • the NAS layer processing unit is specifically configured to generate a first network slice if the first network slice does not belong to the at least one supported network slice, and/or the first network slice belongs to the at least one allowed network slice
  • the session establishment request of the service wherein the session establishment request carries the aforementioned third information, and the session establishment request of the first service is sent to the AS layer processing unit, and the AS layer processing unit is used to control the transceiver to perform the second
  • a service session establishment request (for example, through an access network device) is sent to the core network device.
  • the NAS layer processing unit sends information of the first network slice to the AS layer processing unit, where the first network slice includes a network slice corresponding to the first service, and the NAS layer processing unit When the first network slice belongs to the at least one allowed network slice, send a session establishment request of the first service to the AS layer slave processing unit, and the AS layer processing unit is used to act as the first When the network slice belongs to the at least one supported network slice, controlling the transceiver unit to send the session establishment request of the first service.
  • the AS layer processing unit is configured to, if the first network slice belongs to the at least one supported network slice, control the transceiver unit to request the establishment of a session of the first service (for example, through an access network device ) Is sent to the core network device.
  • the AS layer processing unit is configured to control the transceiver unit to stop sending the session establishment request of the first service if the first network slice does not belong to the at least one supported network slice.
  • the processing unit is configured to, if the first network slice does not belong to the at least one supported network slice, the processing unit sends feedback information at the AS layer to the NAS layer, and according to the feedback information at the NAS layer, not The session establishment request for the first service is generated again, or the NAS layer stops sending the session establishment request for the first service to the AS layer.
  • the AS layer processing unit is configured to send feedback information to the NAS layer processing unit if the first network slice does not belong to the at least one supported network slice, and the NAS layer processing unit is configured to send feedback information according to the feedback information , Generate a session establishment request for the first service, where the session establishment request carries the aforementioned third information, and sends the session establishment request for the first service to the AS layer processing unit, and the AS layer processing unit is used to control the sending and receiving The unit sends the session establishment request of the first service (for example, through the access network device) to the core network device.
  • the NAS layer processing unit is configured to send information of the first network slice to the AS layer processing unit, where the first network slice includes a network slice corresponding to the first service.
  • the NAS layer processing unit is configured to send a session establishment request of the first service to the AS layer processing unit when the first network slice belongs to the at least one allowed network slice.
  • the AS layer processing unit is configured to send feedback information to the NAS layer processing unit when the first network slice does not belong to the at least one supported network slice, where the feedback information is used to indicate that the first network slice does not belong to the at least one supported network slice.
  • a supported network slice is configured to send feedback information to the NAS layer processing unit when the first network slice does not belong to the at least one supported network slice, where the feedback information is used to indicate that the first network slice does not belong to the at least one supported network slice.
  • the NAS layer processing unit is configured to no longer generate a session establishment request for the first service according to the feedback information, or stop sending a session establishment request for the first service to the AS layer processor
  • the NAS layer processing unit is configured to generate a session establishment request for the first service according to the feedback information, wherein the session establishment request carries the aforementioned third information, and sends the session establishment request for the first service to the AS layer for processing Unit, and the AS layer processing unit is configured to control the transceiver unit to send the session establishment request of the first service (for example, through the access network device) to the core network device.
  • the NAS layer processing unit is configured to send information of the first network slice to an AS layer processing unit, where the first network slice includes a network slice corresponding to the first service; the NAS layer processing unit It is used to send at least one allowed network slice information to the AS layer processing unit; the NAS layer processing unit is used to send the first service session establishment request to the AS layer processing unit.
  • the AS layer processing unit controls the transceiver unit to send the session of the first service Create request.
  • the AS layer processing unit sends feedback information to the NAS layer processing unit
  • the feedback information is used to indicate that the first network slice does not belong to the at least one supported network slice.
  • the NAS layer processing unit no longer generates a session establishment request for the first service according to the feedback information, or stops sending a session establishment request for the first service to the AS layer processing unit
  • the NAS layer processing unit generates a session establishment request for the first service according to the feedback information, where the session establishment request carries the aforementioned third information, and sends the session establishment request for the first service to the AS layer processing unit, and the AS layer
  • the processing unit controls the transceiver unit to send the session establishment request of the first service (for example, through the access network device) to the core network device.
  • the processing load of the NAS layer processing unit can be reduced.
  • each unit in the device is respectively used to execute each step of the communication method in the above-mentioned first aspect and any one of its implementation manners.
  • the device is a communication chip
  • the communication chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • the device is a communication device, and the communication device may include a transmitter for sending information or data, and a receiver for receiving information or data.
  • processing unit including the NAS layer processing unit and the AS layer processing unit is only an exemplary description, and this application is not limited to this, and the same processing unit may also perform the NAS layer processing unit and the AS layer processing. The actions of both sides of the unit.
  • a communication device including: a transceiving unit, configured to communicate with a terminal device; a processing unit, configured to obtain instruction information, the instruction information being used to indicate at least one of the following: a first service corresponding to the terminal device Supports or does not support network slice remapping, the first service supports or does not support network slice fallback, the terminal device supports or does not support cell redirection, at least one second cell information, at least one second access device Information about at least one second network slice, wherein the second cell supports the first network slice, the second access device supports the first network slice, and the second network slice belongs to all The supported network slice is used to control the transceiver unit to communicate with the terminal device according to the instruction information.
  • the core network device by enabling the core network device to obtain the above-mentioned indication information, it can be based on the indication information when the cell currently accessed by the terminal device or the access device does not support the first network slice corresponding to the first service that the terminal requests to access , Control terminal equipment, reduce resource overhead.
  • the transceiving unit is configured to receive the indication information from the terminal device.
  • the terminal device may determine whether the currently accessed cell or the access device supports the first network slice, and when it is determined that it does not support the first network slice, the indication information is sent.
  • the terminal device may not make the above determination and directly send the instruction information to the core network device.
  • the foregoing indication information may be stored in a network device such as unified data management (UDM) as network slice subscription information of the terminal device.
  • a network device such as unified data management (UDM) as network slice subscription information of the terminal device.
  • UDM unified data management
  • the transceiver unit is used to receive the instruction information from a network device such as UDM.
  • the processing unit is further configured to determine whether the currently accessed cell or access device supports the first network slice, and when it is determined that it does not support the first network slice, control the terminal device according to the above-mentioned indication information.
  • the core network device may adopt different processing methods according to the specific content indicated by the instruction information.
  • the processing unit is configured to determine a first processing method that meets the condition indicated by the instruction information from multiple processing methods according to the instruction information, and communicate with the terminal device according to the first processing method.
  • the multiple processing methods include the following at least two processing methods:
  • Manner 1 Perform network slice remapping on the first service
  • the processing unit may determine whether to use remapping the first service to other services according to the third indication information.
  • the processing is performed in the manner of network slicing (for example, the third network slicing).
  • the third network slice belongs to an allowed network slice, and the third network slice belongs to a network slice supported by the first cell or the first access device.
  • the processing unit may determine, according to the third indication information, whether to remap the first service to the network slice that needs to fall back to (for example, , The fourth network slice).
  • the fourth network slice may be a network slice pre-configured by the network device for the terminal device to be used for network slice fallback processing, or in other words, the fourth network slice may be a network slice pre-configured by the network device for the terminal device.
  • the rollback process is the target network slice that needs to be rolled back to.
  • the third network slice belongs to a network slice supported by the first cell or the first access device.
  • the processing unit may determine whether to redirect the terminal device to another cell (for example, a third cell) according to the third indication information. To process.
  • the third cell supports the first network slice.
  • the processing unit may redirect the terminal device to the second cell according to the third indication information. Second cell.
  • the terminal device can use the first network slice to access the first service through the second cell, thereby reducing the time delay for the terminal device to access the first service.
  • the processing unit may send the terminal device according to the third indication information Redirect to the second access device.
  • the terminal device can use the first network slice to access the first service through the second access device, thereby reducing the access delay of the terminal device to the first service.
  • the processing unit may reconfigure the first service according to the third indication information. Map to the second network slice.
  • the terminal device can use the second network slice to access the first service through the first access device, thereby reducing the access delay of the terminal device to the first service.
  • the core network device determines the first processing method that conforms to the situation indicated by the instruction information from multiple processing methods according to the instruction information, including: the core network device determines the first processing method according to the instruction information and the instruction information. The priority of each of the multiple processing methods determines the first processing method.
  • the indication information is carried in the session establishment request of the first service.
  • each unit in the device is respectively used to execute each step of the communication method in the above second aspect and any one of its implementation manners.
  • the device is a communication chip
  • the communication chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • the device is a communication device, and the communication device may include a transmitter for sending information or data, and a receiver for receiving information or data.
  • a communication device including: a processing unit, configured to generate indication information, the indication information being used to indicate at least one of the following: the first service corresponding to the terminal device supports or does not support network slice remapping , The first service supports or does not support network slicing fallback, the terminal device supports or does not support cell redirection, information about at least one second cell, information about at least one second access device, and at least one second network Slice information, wherein the second cell supports the first network slice, the second access device supports the first network slice, and the second network slice belongs to the supported network slice; a transceiver unit , Used to send the instruction information.
  • the terminal device by enabling the terminal device to send the above-mentioned instruction information to the core network device, it is possible to use the first network slice corresponding to the first service that the terminal device requests to access when the cell currently accessed by the terminal device or the access device does not support
  • the instruction information controls the terminal equipment and reduces resource overhead.
  • the transceiver unit is further configured to receive first information, where the first information is used to indicate at least one supported network slice, and the at least one supported network slice includes a network slice supported by the first cell and/or A network slice supported by a first access device, where the first cell includes a cell currently accessed by the terminal device, and the first access device includes an access device currently accessed by the terminal device;
  • the processing unit is configured to determine, according to the first information, that the first network slice does not belong to the supported network slice.
  • the indication information is carried in the session establishment request of the first service.
  • each unit in the device is respectively used to execute each step of the communication method in the foregoing third aspect and any one of its implementation manners.
  • the device is a communication chip
  • the communication chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • the device is a communication device, and the communication device may include a transmitter for sending information or data, and a receiver for receiving information or data.
  • a communication device including a processor, the processor is coupled with a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device executes the first
  • the communication method in any one of the first aspect to the third aspect and various implementations thereof.
  • processors there are one or more processors, and one or more memories.
  • the memory may be integrated with the processor, or the memory and the processor may be provided separately.
  • the communication device further includes a transmitter (transmitter) and a receiver (receiver).
  • a communication system including a network device and a terminal device.
  • the terminal device is used to execute the above-mentioned first aspect or the third aspect and the methods in each implementation manner thereof
  • the network device for example, a core network device
  • the network device is used to execute the above-mentioned second aspect and the methods in each implementation manner thereof.
  • the communication system may also include other devices that interact with network devices or terminal devices in the solution provided in the embodiments of the present application, for example, access network devices.
  • a computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes the computer to execute the above-mentioned aspects of the first to third aspects Any aspect and its possible implementation methods.
  • a computer program also called code, or instruction
  • a computer-readable medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the first to third aspects above Any aspect of and the method in its possible implementation.
  • a computer program also called code, or instruction
  • a chip system including a memory and a processor, the memory is used to store a computer program, the processor is used to call and run the computer program from the memory, so that the communication device installed with the chip system executes Any one of the above-mentioned first aspect to the third aspect and the method in its possible implementation manner.
  • the chip system may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • Fig. 1 is an architecture diagram of a communication system to which an embodiment of the present application is applicable.
  • Fig. 2 is a schematic diagram of a communication protocol layer applicable to an embodiment of the present application.
  • Fig. 3 is a schematic interaction diagram of an example of the process of initiating a session establishment request of the present application.
  • Fig. 4 is a schematic interaction diagram of another example of the process of initiating a session establishment request of the present application.
  • Fig. 5 is a schematic diagram of an example of the communication device of the present application.
  • Fig. 6 is a schematic diagram of another example of the communication device of the present application.
  • Fig. 7 is a schematic diagram of another example of the communication device of the present application.
  • Figure 8 is a schematic diagram of an example of the terminal device of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • UMTS universal mobile telecommunication system
  • 5G fifth generation
  • 6G future sixth generation
  • NR new radio
  • the communication system includes but is not limited to the following network elements:
  • the terminal equipment in the embodiments of the present application may also be referred to as: user equipment (UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), access terminal, user unit, user station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • access terminal user unit, user station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • the terminal device may be a device that provides users with voice/data connectivity, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and so on.
  • some examples of terminals are: mobile phones (mobile phones), tablets, notebook computers, palmtop computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, and smart grid (smart grid) Wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocols , SIP) telephone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, computing device or other processing equipment connected to wireless modem, vehicle Devices, wearable devices, terminal devices in the future 5G network or terminal devices in the future evolved public land mobile network (PLMN),
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which need to cooperate with other devices such as smart phones.
  • the terminal device may also be a terminal device in an Internet of Things (IoT) system.
  • IoT Internet of Things
  • the terminal device may also communicate with terminal devices of other communication systems, for example, communication between devices.
  • the terminal device may also transmit (for example, send and/or receive) time synchronization messages with terminal devices of other communication systems.
  • the access device in the embodiment of the present application may be a device used to communicate with a terminal device.
  • the access device may also be called an access network device or a wireless access network device.
  • the access device may be an LTE system.
  • the evolved NodeB (evolved NodeB, eNB or eNodeB) in the cloud radio access network (cloud radio access network, CRAN) scenario can also be a wireless controller, or the access device can be a relay station, an access point, In-vehicle devices, wearable devices, and access devices in 5G networks or access devices in future evolved PLMN networks, etc., can be access points (APs) in WLANs, or gNBs in NR systems.
  • the application examples are not limited.
  • the access device is a device in the RAN, or in other words, a RAN node that connects a terminal device to a wireless network.
  • gNB transmission reception point
  • eNB evolved Node B
  • RNC radio network controller
  • NB Node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • BBU Baseband unit
  • wireless fidelity wireless fidelity, Wifi) access point (AP), etc.
  • a network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node, or a control plane CU node (CU).
  • CU centralized unit
  • DU distributed unit
  • RAN device including a CU node and a DU node, or a control plane CU node (CU).
  • -CP node user plane CU node
  • CU-UP node user plane CU node
  • RAN equipment of DU node may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node, or a control plane CU node (CU).
  • -CP node user plane CU node (CU-UP node) and RAN equipment of DU node.
  • the access device provides services for the cell, and the terminal device communicates with the access device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be corresponding to the access device (for example, a base station) A cell.
  • a cell can belong to a macro base station or a base station corresponding to a small cell.
  • the small cell here can include: metro cell, micro cell, pico cell, and micro cell. Femto cells, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.
  • the carrier in the LTE system or the 5G system can have multiple cells working at the same frequency at the same time.
  • the concept of the above-mentioned carrier and the cell can also be regarded as equivalent.
  • CA carrier aggregation
  • the concept of carrier and cell is equivalent, for example, a terminal device accessing a carrier is equivalent to accessing a cell.
  • the communication system of the present application may also be applicable to vehicle to everything (V2X) technology, that is, the terminal device of the present application may also be a car, for example, a smart car or a self-driving car.
  • V2X vehicle to everything
  • V2X represents different communication targets.
  • V2X can include but is not limited to: vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to network, V2N), and vehicle to pedestrian (V2P).
  • V2V vehicle to vehicle
  • V2I vehicle to infrastructure
  • V2N vehicle to network
  • V2P vehicle to pedestrian
  • the access device can configure a "zone" for the UE. Among them, this area can also be called a geographic area.
  • this area can also be called a geographic area.
  • the regions When the regions are configured, the world will be divided into multiple regions, which are defined by reference points, length, and width.
  • the UE uses the length, width, number of areas above the length, number of areas above the width, and reference points for the remaining operations.
  • the above information can be configured by the access device.
  • the access management function entity is mainly used for mobility management and access management, etc., and can be used to implement other functions besides session management in the mobility management entity (MME) function in the LTE system, such as lawful interception and Access authorization/authentication and other functions.
  • MME mobility management entity
  • the access management network element may be an access and mobility management function (AMF) entity.
  • AMF access and mobility management function
  • the access management function entity may still be an AMF entity, or may also have other names, which is not limited in this application.
  • the session management function (SMF) entity is mainly used for session management, terminal device Internet protocol (IP) address allocation and management, selection of manageable user plane functions, policy control, and termination of charging function interfaces Point and downlink data notification, etc.
  • IP Internet protocol
  • the session management network element may still be an SMF entity, or may also have other names, which are not limited by this application.
  • the unified data management entity is responsible for the same processing of front-end data, including user identification, user subscription data, authentication data, and so on.
  • entity may also be referred to as a network element, equipment, device, or module, etc., which is not particularly limited in this application.
  • description of "entity” is omitted in part of the description.
  • SMF entity is referred to as SMF.
  • SMF should be understood as SMF network element or SMF. Entity, hereinafter, the description of the same or similar situation is omitted.
  • the network elements or entities included in the communication system listed above are only exemplary descriptions, and this application is not particularly limited.
  • the communication system may also include, but is not limited to, application function (AF), network capability exposure function (NEF) entity, user plane function (UPF) entity, data network (data network) , DN), policy control function (PCF) entities, etc.
  • AF application function
  • NEF network capability exposure function
  • UPF user plane function
  • PCF policy control function
  • Figure 2 shows a schematic diagram of the protocol layer architecture of the communication system of the present application.
  • the protocol layer of the terminal device may include an access layer (access stratum AS) and a non-access stratum (non-access stratum NAS) .
  • access stratum AS access stratum
  • non-access stratum NAS non-access stratum
  • the so-called access layer and non-access layer actually proceed from the perspective of the protocol stack.
  • the NAS layer In the protocol stack, the high-level protocol modules that have nothing to do with wireless access are generally called the NAS layer. As shown in Figure 2, the NAS layer exists in the UE and the core network (core network, CN), and mainly handles business-related functions.
  • the non-access layer refers to the signaling layer that only the UE and CN need to process.
  • the wireless access network such as the RNC and NodeB, is only transparent transmission, which is the signaling layer that does not need to be processed.
  • the process of the non-access layer mainly includes mobility management in the circuit domain, call control in the circuit domain, mobility management in the packet domain, and session management in the packet domain.
  • the NAS layer is mainly used for user identity registration and authentication management, mobility management, call service management, call parameter setting, etc.
  • the radio resource control (Radio Resource Control, RRC) layer and the radio access network application protocol (RANAP) layer and the following protocol layers are called the access layer.
  • the AS layer refers to the equipment of the radio access layer, for example, the signaling layer that the RNC and NodeB need to participate in processing.
  • the communication protocols of the access layer are all related to wireless access, and the AS layer exists in the UE and RNC.
  • the process of the access layer mainly includes: PLMN selection, cell selection, and radio resource management processes.
  • the AS layer is mainly used for wireless resource management, quality of service (QoS) control, wireless channel transmission format setting, service data segmentation and assembly, and security processing.
  • QoS quality of service
  • the access layer processes are all low-level processes, through which the bottom-level bearer is built for the upper-level signaling process.
  • the process of the non-access layer mainly includes mobility management in the circuit domain, call control in the circuit domain, mobility management in the packet domain, and session management in the packet domain.
  • the NAS protocol handles the transmission of information between UE and CN.
  • the transmitted content can be user information or control information, such as service establishment, release, or mobility management information.
  • the NAS message is independent of the AS protocol structure to a certain extent, that is, it has nothing to do with what kind of radio access network is sampled.
  • the transmission of NAS messages is based on the underlying AS protocol.
  • AS is a protocol adopted by the wireless access network.
  • the AS protocol in UMTS includes wireless interface protocol, Iub protocol and Iu protocol.
  • the radio interface protocol is the protocol between the UE and UTRAN, and the upper layers of the protocol (for example, MAC, RLC, RRC) are located between the UE and the RNC.
  • the bottom layer (for example, PHY) is located between the UE and NodeB.
  • the "core network device” in this application may include any device capable of communicating with a terminal device via transparent transmission of one or more intermediate devices (for example, access devices), such as the aforementioned access management function entity or session management function entity, or
  • the "core network device” in this application may be a device that communicates with terminal devices through NAS layer signaling.
  • supported network slice can be understood as a network slice supported by a cell or a network slice supported by an access device.
  • the network slicing supported by a cell can be understood as the configuration of the cell (for example, resource configuration, etc.) that can meet the requirements of the network slicing, or that the services corresponding to the network slicing can be transmitted through the cell, or that the network slicing corresponds to The accuracy and reliability of the service when transmitting through the cell can meet the requirements of the service.
  • the network slicing supported by the access device can be understood as the configuration of the access device (for example, resource configuration, etc.) that can meet the requirements of the network slicing, or in other words, the service corresponding to the network slicing can be performed through the access device Transmission, in other words, the accuracy and reliability of the service corresponding to the network slice when being transmitted through the access can meet the requirements of the service.
  • the supported network slice may be sent by the access device to the terminal device in a broadcast or multicast manner.
  • the supported network slice may be sent by the access device to the terminal device through dedicated signaling (or in a unicast manner).
  • Allowed network slice can be understood as the network slice that the terminal device is allowed to use in the current network.
  • the allowed network slice may be the home network allocated to the terminal device to allow the terminal device to be in the home network (for example, the registration area specified in the home network)
  • the network slicing used in is recorded as the allowed network slicing of the home network.
  • the allowed network slice of the home network is issued to the terminal device by the network device (for example, the core network device) of the home network.
  • the allowed network slice of the home network can be configured to the terminal device when the terminal device registers or signs.
  • the permitted network slice may be the terminal device allocated by the visited network to the terminal device to allow the terminal device to use in the visited network
  • the network slicing of the network is recorded as the allowed network slicing of the visited network.
  • the allowed network slice of the visited network is issued to the terminal device by the network device (for example, the core network device) of the visited network.
  • the allowed network slices of the visited network and the allowed network slices of the home network have a mapping relationship, and the mapping relationship is issued to a network device (for example, a core network device) of the visited network Terminal Equipment.
  • a network device for example, a core network device
  • the network may include but is not limited to PLMN, that is, the home network may include, but is not limited to, a home public land mobile network (HPLMN).
  • HPLMN home public land mobile network
  • the visited network may include but is not limited to the visited public land mobile network (VPLMN).
  • Network slice re-mapping may mean that a service that has been mapped to a certain network slice is remapped to another network slice.
  • network slice #1 (slice#1) is remapped to network slice #2 (slice#2)" can be understood to mean that the service of slice #1 (or the service mapped to slice #1) can pass through slice #2 is realized, or in other words, the service of slice#1 is realized through the network resources of slice#2.
  • a certain service “supports slice remapping” can be understood as a service that has been mapped to a certain network slice is allowed to be remapped to other network slices, in other words, the service is allowed (or, can) to pass through other network slices. Map to a network slice other than the network slice to achieve.
  • a certain service "does not support slice remapping" can be understood as a service that has been mapped to a certain network slice is not allowed to be remapped to other network slices, that is, the service is only allowed (or can) pass through the already mapped To achieve the network slicing.
  • a slice fallback can mean that a service that has been mapped to a certain network slice is remapped to a certain pre-allocated network slice (for ease of understanding, it is called the original network slice), and the original network slice It can be pre-allocated by the network to the terminal device.
  • a certain service “supports network slice fallback” can be understood as a service that has been mapped to a certain network slice is allowed to be mapped to the initial network slice, in other words, the service is allowed (or, can) pass through the initial network slice. Network slicing to achieve.
  • the "slice fallback not supported" for a certain service can be understood as a service that has been mapped to a certain network slice is not allowed to be mapped to the initial network slice, that is, the service is only allowed to be implemented through the network slice that has been mapped to.
  • the handover is the handover process, including handover decision: based on coverage, capacity or service, etc., and then handover preparation: resource application, data forwarding, etc. will be carried out between the source cell and the target cell, and the handover preparation will be issued after the handover preparation is completed.
  • Handover command UE executes handover.
  • the target cell information is carried in a radio resource release (RRC release) message, and the UE re-initiates access according to the target cell information.
  • RRC release radio resource release
  • Redirection is usually a transitional method for UEs that do not support handover.
  • FIG. 3 shows that the terminal device #A (ie, an example of the terminal device) is in the currently accessed access device #A (ie, an example of the first access device), and in the currently accessed cell #A (ie, An example of the first cell), the processing procedure when it is necessary to access service #A (that is, an example of the first service).
  • a service may also be referred to as an application.
  • the access device #A may provide a cell, that is, the cell #A.
  • the access device #A may also provide multiple cells including the cell #A, where the network slices supported by the multiple cells may be the same or different, and this application is not particularly limited.
  • terminal device #A may currently be in the home network or in the visited network, which is not particularly limited in this application.
  • the terminal device #A may receive information #A of the network slice supported by the cell #A (ie, an example of the first information).
  • the network slice supported by the cell #A includes at least one network slice.
  • the information #A is used to indicate at least one network slice supported by the cell #A.
  • the information #A includes information about at least one network slice supported by the cell #A.
  • the information of the network slice may also be referred to as the identifier of the network slice, and the information of a network slice is used to indicate the network slice.
  • the network slice information may include, but is not limited to, single network slice selection assistance information (S-NSSAI).
  • S-NSSAI single network slice selection assistance information
  • the information #A may include at least one supported network slice selection assistance information (Supported NSSAI).
  • the at least one Supported NSSAI can be understood as the NSSAI of the network slice supported by cell #A.
  • the network slice indicated by the information #A may be all or part of the network slice supported by the cell #A, which is not particularly limited in this application.
  • the information #A may be sent by the access device #A to the terminal device #A in a manner such as broadcast, multicast, or unicast.
  • the information #A is information encapsulated by the AS protocol layer, and the terminal device #A can receive the information #A at the AS layer.
  • terminal device #A obtaining information #A is only an exemplary description, and this application is not limited to this.
  • the information #A can also be terminal device #A via D2D transmission. Obtained by other terminal equipment.
  • the terminal device #A may receive the information #B of the allowed network slice (ie, an example of the second information).
  • the allowed network slice of the terminal device #A includes at least one network slice.
  • the information #B is used to indicate at least one allowed network slice of the terminal device #A in the current network (home network or visited network).
  • the information #B includes information of at least one allowed network slice of the terminal device #A.
  • the information #B may include at least one allowed network slice selection assistance information (Allowed NSSAI).
  • Allowed NSSAI can be understood as the NSSAI of the allowed network slice of the terminal device #A in the current network.
  • the network slice indicated by the information #B may be all or part of the network slices allowed by the terminal device #A, which is not particularly limited in this application.
  • the information #B may be sent to the terminal device #A by a network device of the network where the terminal device #A is currently located (for example, a core network device, denoted as core network device #A).
  • a network device of the network where the terminal device #A is currently located for example, a core network device, denoted as core network device #A.
  • the information #B is information encapsulated by the NAS protocol layer, and the terminal device #A can receive the information #B at the NAS layer.
  • the core network equipment #A may include various equipment capable of communicating with terminal equipment through NAS signaling, such as MME, AMF, or SMF, which is not particularly limited in this application.
  • the terminal device #A can determine the information of the network slice (denoted as: network slice #1) corresponding to the service #A (or application #A). As an example and not a limitation, the terminal device #A may perform this action at the NAS layer.
  • the network slice #1 includes the network slice to which the service #A is mapped.
  • the network slice #1 may be a network slice of the home network.
  • the network slice #1 may be the network slice corresponding to the network slice #2, and the network slice may be the network slice corresponding to the service #A in the home network.
  • the information of the network slice #1 may include the S-NSSAI of the network slice #1, denoted as S-NSSAI#1.
  • terminal device #A processes the session of service #A (denoted as session #A) according to network slice #1, network slices supported by cell #A, and allowed network slices of terminal device #A. Specifically, the processing of the establishment request for session #A.
  • the terminal device #A performs the foregoing processing according to the relationship between the S-NSSAI#1, the Supported NSSAI and the Allowed NSSAI.
  • the determination process can be performed at the NAS layer (ie, method A), or at the AS layer (ie, method B), or jointly at the AS layer and the NAS layer (ie, method C).
  • the process is explained in detail.
  • the AS layer (for example, the logical processing unit of the AS layer) of the terminal device #A may send the information of the network slice set #A (for example, the network slice set#) to the NAS layer (for example, the logical processing unit of the NAS layer).
  • Information of each network slice in A for example, the aforementioned Supported NSSAI.
  • the NAS layer of the terminal device #A determines whether the network slice #1 belongs to the network slice supported by the cell #A, for example, whether the S-NSSAI #1 belongs to Supported NSSAI.
  • the NAS layer of the terminal device #A determines whether the network slice #1 belongs to the allowed network slice of the terminal device #A, for example, whether the S-NSSAI #1 belongs to the Allowed NSSAI.
  • the NAS layer of the terminal device #A processes the establishment request of the session #A based on the result of the above determination.
  • the above determination combination may include: S-NSSAI#1 belongs to Supported NSSAI, and S-NSSAI#1 belongs to Allowed NSSAI (that is, determination result #1); S-NSSAI#1 does not belong to Supported NSSAI, and/or S- NSSAI#1 does not belong to Allowed NSSAI (that is, determination result #2).
  • the NAS layer of the terminal device #A may generate a session #A establishment request, and send the establishment request of the session #A to the AS layer of the terminal device #A.
  • the AS layer of the terminal device #A may send the establishment request of the session #A to the core network device #A via the access device #A.
  • the establishment request of the session #A includes the information of the network slice #1, for example, S-NSSAI#1.
  • judgment result #2 it can include but is not limited to the following processing methods
  • the NAS layer of the terminal device #A does not generate (for example, it is prohibited to generate) the establishment request of the session #A.
  • the NAS layer of the terminal device #A stops (for example, prohibits) sending the establishment request of the session #A to the AS layer of the terminal device #A.
  • the NAS layer of the terminal device #A may generate a session #A establishment request, the session #A establishment request includes the information of the network slice #1, for example, S-NSSAI#1, and the session #A
  • the establishment request includes information #C (that is, an example of the third information).
  • the information #C may include but is not limited to at least one of the following information:
  • the information #C1 is used to indicate whether the service #A supports network slice remapping, that is, the information #C1 is used to indicate that the service #A supports network slice remapping, or the information #C1 indicates that the service #A Does not support network slicing remapping.
  • a network device for example, a core network device
  • a network device for example, a core network device
  • the service parameters may include, but are not limited to, the urgency of the service, the priority of the service, the type of service (for example, real-time communication or download type), and the like.
  • the core network device #A can obtain the information #C1 from the establishment request of the session #A.
  • the core network device #A can obtain the aforementioned determination result #2 through one or more of the following methods.
  • the core network device #A detects information #C, it can be determined that the cell or access device currently accessed by the terminal device #A does not support the network slice #1, or the allowed network slice of the terminal device #A does not include This network slice #1, and then the above-mentioned judgment result #2 is obtained.
  • the establishment request of the session #A may also carry information #D, which may be used to indicate that the cell currently accessed by the terminal device #A or the access device does not support the network slice #1, or the terminal device The allowed network slice of #A does not include the network slice #1, and the above determination result #2 is obtained.
  • the core network device #A may determine the information of the network slice supported by the cell #A, for example, Supported NSSAI; and the core network device #A may determine the information of the allowed network slice of the terminal device #A, for example, Allowed NSSAI; Therefore, the core network device #A can obtain the judgment result #2 based on the above information.
  • the core network device #A can perform network slice remapping on the service #A according to the information #C1, that is, processing method 1.
  • the core network device #A may remap the service #A to the network slice #2, which belongs to the network slice supported by the aforementioned cell #A, and the network slice #2 belongs to the aforementioned terminal device #A.
  • Allowed network slices that is, the information of network slice #2 (denoted as S-NSSAI#2) belongs to Supported NSSAI, and S-NSSAI#2 belongs to Allowed NSSAI.
  • the terminal device #A can use the network slice #2 to complete the access to the service #A in the cell #A, or in other words, use the network slice #2 to establish a session connection for the service #A.
  • the information #C2 is used to indicate whether the service #A supports network slicing fallback, that is, the information #C2 is used to indicate that the service #A supports network slicing fallback, or the information #C1 indicates that the service #A Network slicing rollback is not supported.
  • the network device (for example, the core network device) can pre-deliver information to the terminal device whether each of the multiple services supports network slicing fallback, so that the terminal device can determine based on the information Whether a certain service supports network slicing fallback.
  • a network device may pre-deliver multiple service parameter groups (wherein, each service parameter group may include at least one service parameter) to the terminal device and whether it supports network slicing. Therefore, the terminal device can determine, based on the relationship, the situation corresponding to the service parameter group to which the service parameter of a certain service belongs to whether the service supports network slicing fallback.
  • the service parameters may include, but are not limited to, the urgency of the service, the priority of the service, the type of the service (for example, the type of real-time communication or downloading), and the like.
  • the core network device #A can obtain the information #C2 from the establishment request of the session #A.
  • the core network device #A can obtain the aforementioned determination result #2 through one or more of the aforementioned ways x to z.
  • the core network device #A can perform network slicing rollback for the service #A based on the information #C2, that is, processing method 2.
  • the core network device #A may map the service #A to the network slice #3 (ie, an example of the initial network slice).
  • the network slice #3 may be a network slice pre-allocated by a network device (for example, a core network device) to the terminal device #A for network slice fallback processing.
  • a network device for example, a core network device
  • the network slice #3 may belong to the network slice supported by the aforementioned cell #A, or may not belong to the network slice supported by the cell #A.
  • the network slice #3 may belong to the allowable network slice of the aforementioned terminal device #A, or may not belong to the allowable network slice of the terminal device #A. This application is not particularly limited.
  • the information #C3 is used to indicate whether the terminal device #A supports cell redirection, that is, the information #C3 is used to indicate that the terminal device #A supports cell redirection, or the information #C3 indicates that the terminal device #A Cell redirection is not supported.
  • the terminal device can determine whether to support cell redirection according to its own capabilities.
  • the core network device #A can obtain the information #C3 from the establishment request of the session #A.
  • the core network device #A can obtain the aforementioned determination result #2 through one or more of the aforementioned ways x to z.
  • the core network device #A can perform cell redirection on the terminal device #A according to the information #C3, that is, processing method 3.
  • the core network device #A may redirect the terminal device #A to the cell #B (ie, an example of the second cell).
  • the network slice #1 may belong to the network slice supported by the cell #B.
  • the terminal device #A can use the network slice #1 to complete the access to the service #A in the cell #B, or in other words, establish a session connection of the service #A through the cell #B.
  • the information #C4 is used to indicate network slice #4 (ie, an example of the second network slice).
  • the network slice #4 may be determined by the terminal device #A according to the above information #A and information #B, that is, the network slice #4 belongs to the network slice supported by the above cell #A, and the network slice #4 belongs to The allowed network slice of the aforementioned terminal device #A, that is, the information of network slice #4 (denoted as S-NSSAI#4) belongs to Supported NSSAI, and S-NSSAI#4 belongs to Allowed NSSAI.
  • the core network device #A can obtain the information #C4 from the establishment request of the session #A.
  • the core network device #A can obtain the aforementioned determination result #2 through one or more of the aforementioned ways x to z.
  • the core network device #A can remap the service #A to the network slice #4 according to the information #C4, that is, the processing method 4.
  • the terminal device #A can use the network slice #4 to complete the access to the service #A in the cell #A, or in other words, use the network slice #4 to establish a session connection for the service #A.
  • the information #C5 is used to indicate the cell #B (ie, an example of the second cell), where the cell #B is a cell that supports the network slice #1.
  • the cell #B may broadcast the information of the network slice supported by the cell #B, so that the terminal device #A may determine the cell according to the information broadcast by the cell #B (specifically, the network device of the cell #B) #B Supports the network slice #1.
  • the terminal device #A may also obtain the network slice information supported by the cell #B from other devices (for example, other terminal devices), which is not particularly limited in this application.
  • the core network device #A can obtain the information #C5 from the establishment request of the session #A.
  • the core network device #A can obtain the aforementioned determination result #2 through one or more of the aforementioned ways x to z.
  • the core network device #A can perform cell redirection on the terminal device #A according to the information #C5, so that the terminal device #A communicates through the cell #B, that is, processing mode 5.
  • the terminal device #A can use the network slice #1 to complete the access to the service #A in the cell #B, or in other words, use the session connection to establish the service #A in the cell #B.
  • the processing performed by the core network device according to the information #C may include the above processing methods 1 to 5 Two or more treatment methods.
  • processing methods 1 to 5 can be set arbitrarily according to needs, and this application is not particularly limited.
  • the NAS layer of the terminal device #A may determine whether the network slice #1 belongs to the allowed network slice of the terminal device #A, for example, whether S-NSSAI #1 belongs to Allowed NSSAI.
  • the NAS layer of the terminal device #A sends a session establishment request of the service #A to the AS layer (for example, the logical processing unit of the AS layer) ,
  • the establishment request of the session #A includes the information of the network slice #1, for example, S-NSSAI#1.
  • the establishment request of the session #A may not include the information of the network slice #1, that is, the NAS layer of the terminal device #A may combine the information of the network slice #1 with the establishment request of the session #A They are sent to the AS layer independently of each other.
  • the AS layer of the terminal device #A can determine whether the network slice #1 belongs to the network slice supported by the cell #A, for example, whether the S-NSSAI #1 belongs to the Supported NSSAI.
  • the AS layer may send the establishment request of the session #A to the core network device #A via the access device #A.
  • the AS layer sends feedback information to the NAS layer and stops sending the establishment request of the session #A to the access device #A.
  • the information is used to indicate that the network slice #1 does not belong to the network slice supported by the cell #A.
  • the NAS layer of the terminal device #A may process the establishment request of the session #A according to the feedback information.
  • the NAS layer of the terminal device #A does not generate (for example, it is prohibited to generate) the establishment request of the session #A.
  • the NAS layer of the terminal device #A may generate a session #A establishment request.
  • the session #A establishment request includes the information of the network slice #1, for example, S-NSSAI#1, and the session #A’s
  • the establishment request includes information #C (that is, an example of the third information).
  • the information included in the information #C and the processing of the core network device according to the information #C may be similar to the process described in the above method A.
  • the detailed description is omitted.
  • the NAS layer of the terminal device #A sends a session establishment request of service #A to the AS layer (for example, the logical processing unit of the AS layer), and the establishment request of the session #A includes the information of the network slice #1, for example, S-NSSAI#1.
  • the establishment request of the session #A may not include the information of the network slice #1, that is, the NAS layer of the terminal device #A may combine the information of the network slice #1 with the establishment request of the session #A They are sent to the AS layer independently of each other.
  • the NAS layer of the terminal device #A sends the allowed network slice information of the terminal device #A to the AS layer, for example, Allowed NSSAI.
  • the AS layer of the terminal device #A determines whether the network slice #1 belongs to the network slice supported by the cell #A, for example, whether the S-NSSAI #1 belongs to Supported NSSAI.
  • the AS layer of the terminal device #A determines whether the network slice #1 belongs to the allowed network slice of the terminal device #A, for example, whether the S-NSSAI #1 belongs to the Allowed NSSAI.
  • the AS layer can pass the establishment request of the session #A
  • the access device #A is sent to the core network device #A.
  • the AS layer sends feedback to the NAS layer Information and stop sending the establishment request of the session #A to the access device #A.
  • the feedback information is used to indicate that the network slice #1 does not belong to the network slice supported by the cell #A and/or the network slice #2 does not belong to the Network slicing supported by cell #A.
  • the NAS layer of the terminal device #A may process the establishment request of the session #A according to the feedback information.
  • the NAS layer of the terminal device #A does not generate (for example, it is prohibited to generate) the establishment request of the session #A.
  • the NAS layer of the terminal device #A may generate a session #A establishment request.
  • the session #A establishment request includes the information of the network slice #1, for example, S-NSSAI#1, and the session #A’s
  • the establishment request includes information #C (that is, an example of the third information).
  • the information included in the information #C and the processing of the core network device according to the information #C may be similar to the process described in the above method A.
  • the detailed description is omitted.
  • Figure 4 shows the processing procedure of core network device #1 when it receives a session establishment request from terminal device #1.
  • the access device currently connected to terminal device #1 is recorded as the access device #1 (i.e., an example of the first access device)
  • the cell currently accessed by the terminal device #1 is recorded as cell #1 (i.e., an example of the first cell)
  • the service that the terminal device currently needs to access is recorded as business# 1 (ie, an example of the first service).
  • the network slice corresponding to this service #1 ie, an example of the first network slice
  • network slice #A is recorded as network slice #A
  • the access device #1 may provide a cell, that is, the cell #1.
  • the access device #1 may also provide multiple cells including the cell #1, where the network slices supported by the multiple cells may be the same or different, and this application is not particularly limited.
  • the terminal device #1 may currently be in the home network or in the visited network, which is not particularly limited in this application.
  • terminal device #1 sends a session establishment request of service #1 to core network device #1, and the session establishment request carries information of network slice #A) corresponding to service #1, such as network slice
  • the S-NSSAI of #A is recorded as S-NSSAI#A.
  • the core network device #1 acquires the information #1 (that is, an example of the instruction information).
  • the information #1 may include but is not limited to at least one of the following information:
  • the information #1A is used to indicate whether the service #1 supports network slice remapping, that is, the information #1A is used to indicate that the service #1 supports network slice remapping, or the information #1A indicates that the service #1 Does not support network slicing remapping.
  • the information #1B is used to indicate whether the service #1 supports network slicing fallback, that is, the information #1B is used to indicate that the service #1 supports network slicing fallback, or the information #1B indicates that the service #1 Network slicing rollback is not supported.
  • the information #1C is used to indicate whether the terminal device #1 supports cell redirection, that is, the information #1C is used to indicate that the terminal device #1 supports cell redirection, or the information #1C indicates that the terminal device #1 Cell redirection is not supported.
  • the information #1D is used to indicate network slice #B (that is, an example of the second network slice).
  • the network slice #B belongs to the aforementioned network slice set #1, and the network slice #B belongs to the aforementioned network slice set #2.
  • the information #1E is used to indicate the cell #2 (ie, an example of the second cell), where the cell #2 is a cell that supports the network slice #A.
  • the terminal device #1 may send the information #1 to the core network device #1.
  • the information #1 may be carried in the session establishment request of the service #1.
  • the method and process for determining the terminal device #1 may be similar to the method and process for determining the information #C in the method shown in FIG.
  • terminal device #1 may not determine whether the network slice #A, the network slice supported by cell #1, and the allowable network slice of terminal device #1. Relationship between.
  • the process of the terminal device #1 determining the relationship between the network slice #A, the network slice supported by the cell #1, and the allowed network slice of the terminal device #1 is optional.
  • another network device such as UDM sends the information #1 to the core network device #1.
  • the core network device #1 may send a query request to UDM, and the query request is used to request to send the information #1.
  • the query request may include information of the terminal device #1 and information of the network slice #A.
  • the core network device may also determine whether the network slice #A belongs to the network slice supported by the cell #1.
  • S221 or S222 is executed when the result of the determination is that the network slice #1 does not belong to the network slice supported by the cell #1.
  • S240 is executed when the result of the determination is that the network slice #1 does not belong to the network slice supported by the cell #1.
  • the core network device #1 can control the terminal device #1 according to the information #1.
  • the process in which the core network device #1 can control the terminal device #1 according to the information #1 may be similar to the process in which the core network device #A controls the terminal device #A according to the information #C.
  • the core network device #1 may perform network slice remapping on the service #A according to the information #1A. That is, the core network device #1 can remap the service #1 to the network slice #C, the network slice #C belongs to the aforementioned network slice set #1, and the network slice #C belongs to the aforementioned network slice set #2.
  • core network device #1 may perform network slicing rollback for service #A according to the information #1B. That is, the core network device #1 can map the service #1 to the network slice #D (ie, an example of the initial network slice).
  • the network slice #D may be a network slice pre-allocated by a network device (for example, a core network device) to the terminal device #1 for network slice fallback processing.
  • the network slice #D may belong to the aforementioned network slice set #1, or may not belong to the network slice set #1.
  • the network slice #D may belong to the aforementioned network slice set #2, or may not belong to the network slice set #2. This application is not particularly limited.
  • the core network device #A may perform cell redirection on the terminal device #A according to the information #1C.
  • the core network device #A may redirect the terminal device #A to the cell #3 (ie, an example of the second cell).
  • the network slice #A belongs to the network slice supported by the cell #3.
  • the core network device #1 may remap the service #1 to the network slice #B according to the information #1D.
  • the core network device #1 may perform cell redirection on the terminal device #1 according to the information #1E, so that the terminal device #1 communicates through the cell #2.
  • FIG. 5 is a schematic diagram of a communication device 300 provided in an embodiment of this application.
  • the apparatus 300 may be a terminal device, or a chip or circuit, for example, a chip or circuit that can be provided in a terminal device.
  • the apparatus 300 may include a processing unit 310 (, optionally, a storage unit 320.
  • the storage unit 320 is used to store instructions.
  • the processing unit 310 is configured to execute the instructions stored in the storage unit 320, so that the apparatus 300 implements the steps performed by the terminal device (for example, terminal device #A or terminal device #1) in the above method .
  • the device 300 may also include an input port 330 (ie, an example of a communication unit) and an output port 330 (ie, another example of a transceiver unit).
  • the processing unit 310, the storage unit 320, the input port 330, and the output port 330 can communicate with each other through internal connection paths to transfer control and/or data signals.
  • the storage unit 320 is used to store a computer program, and the processing unit 310 can be used to call and run the calculation program from the storage unit 320 to complete the steps of the terminal device in the foregoing method.
  • the storage unit 320 may be integrated in the processing unit 310, or may be provided separately from the processing unit 310.
  • the input port 330 may be a receiver
  • the output port 340 may be a transmitter.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the input port 330 is an input interface
  • the output port 340 is an output interface
  • the functions of the input port 330 and the output port 340 may be implemented by a transceiver circuit or a dedicated chip for transceiver.
  • the processing unit 310 may be implemented by a dedicated processing chip, a processing circuit, a processing unit, or a general-purpose chip.
  • a general-purpose computer may be considered to implement the terminal device provided in the embodiments of the present application.
  • the program codes that realize the functions of the processing unit 310, the input port 330, and the output port 340 are stored in the storage unit 320.
  • the general processing unit implements the functions of the processing unit 310, the input port 330 and the output port 340 by executing the code in the storage unit 320. .
  • the terminal device When the device 300 is a terminal device, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • the memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the processor with processing functions can be regarded as the processing unit 310 of the terminal device.
  • the processing unit 310 may also be referred to as a processor, a processing board, a processing module, a processing device, and so on.
  • the receiver, receiver, or receiving circuit, etc. can be regarded as the input port 330.
  • the transmitter, transmitter, or transmission circuit can be regarded as the output port 340.
  • the chip When the communication device 300 is a chip, the chip includes a transceiver circuit and a processing circuit.
  • the transceiver circuit may be an input/output circuit or a communication interface; the processing circuit may be a processor, microprocessor, or integrated circuit integrated on the chip.
  • the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to the transmitter and transmitted by the transmitter, and the input circuit and output
  • the circuit can be a different circuit or the same circuit. In this case, the circuit is used as an input circuit and an output circuit at different times.
  • the input port 330 is used to receive first information, the first information is used to indicate at least one supported network slice, and the at least one supported network slice includes the network slice supported by the first cell and/ Or a network slice supported by the first access device, where the first cell includes the cell currently accessed by the terminal device, and the first access device includes the access device currently accessed by the terminal device, and is used to receive the second information,
  • the second information is used to indicate at least one allowed network slice;
  • the processing unit 310 is configured to process a session establishment request of the first service according to the first information and the second information.
  • processing unit 310 is specifically configured to:
  • the control output port 340 sends a session establishment request for the first service, wherein the first network slice The network slice includes the network slice corresponding to the first service;
  • control the output port 340 to stop the session establishment request of the first service
  • the output port 340 is controlled to send third information, and the third information is used
  • the first service supports or does not support network slice remapping, the first service supports or does not support network slice fallback, the terminal device supports or does not support cell redirection, at least one first service Information about the second cell, information about at least one second access device, and information about at least one second network slice, wherein the second cell supports the first network slice, and the second access device supports the first network slice.
  • a network slice, and the second network slice belongs to the supported network slice.
  • the processing unit 310 is configured to send information about at least one supported network slice at the AS layer to the NAS layer, for determining whether the first network slice belongs to the at least one supported network slice at the NAS layer, wherein: The first network slice includes a network slice corresponding to the first service, and it is determined at the NAS layer whether the first network slice belongs to the at least one allowed network slice.
  • the processing unit 310 is configured to send information of the first network slice at the NAS layer to the AS layer, where the first network slice includes a network slice corresponding to the first service;
  • the processing unit 310 is configured to send a session establishment request for the first service at the NAS layer to the AS layer;
  • the processing unit 310 controls the output port 340 at the AS layer to send the session establishment request of the first service;
  • the processing unit 310 sends feedback information at the AS layer to the NAS layer, where the feedback information is used to indicate that the first network slice does not belong to the at least one supported network slice.
  • Network slicing
  • the processing unit 310 is configured to send the first network slice information to the AS layer by the NAS layer, where the first network slice includes the network slice corresponding to the first service, and sends the information to the first network slice at the NAS layer.
  • the AS layer of the terminal device sends information about at least one allowed network slice, and the NAS layer sends a session establishment request of the first service to the AS layer of the terminal device;
  • the processing unit 310 controls the output port 340 to send the Session establishment request of the first service
  • the processing unit 310 sends a notification to the NAS of the terminal device at the AS layer.
  • the layer sends feedback information, where the feedback information is used to indicate that the first network slice does not belong to the at least one supported network slice.
  • the functions and actions of the modules or units in the apparatus 300 listed above are only exemplary.
  • the modules or units in the apparatus 300 can be used to execute the above methods.
  • Each action or process performed by the terminal device for example, terminal device #1 or terminal device #A.
  • terminal device #1 or terminal device #A for example, terminal device #1 or terminal device #A.
  • FIG. 6 is a schematic diagram of a communication device 400 provided in an embodiment of this application.
  • the device 400 may be a core network device, or a chip or circuit, for example, a chip or circuit that can be provided in a core network device.
  • the device 400 may include a processing unit 410 (that is, an example of a processing unit), and optionally, may also include a storage unit 420.
  • the storage unit 420 is used to store instructions.
  • the processing unit 410 is configured to execute the instructions stored in the storage unit 420, so that the apparatus 400 implements the steps performed by the network device in the foregoing method.
  • the device 400 may further include an input port 430 (ie, an example of a communication unit) and an output port 440 (ie, another example of a transceiver unit).
  • the processing unit 410, the storage unit 420, the input port 430, and the output port 440 can communicate with each other through internal connection paths to transfer control and/or data signals.
  • the storage unit 420 is used to store a computer program, and the processing unit 410 can be used to call and run the computer program from the storage unit 420 to complete the steps of the network device in the above method.
  • the storage unit 420 may be integrated in the processing unit 410, or may be provided separately from the processing unit 410.
  • the input port 430 may be a receiver
  • the output port 440 may be a transmitter.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the input port 430 is an input interface
  • the output port 440 is an output interface
  • the functions of the input port 430 and the output port 440 may be implemented by a transceiver circuit or a dedicated chip for transceiver.
  • the processing unit 410 may be implemented by a dedicated processing chip, a processing circuit, a processing unit, or a general-purpose chip.
  • a general-purpose computer may be considered to implement the network device provided in the embodiment of the present application.
  • the program code that realizes the functions of the processing unit 410, the input port 430 and the output port 440 is stored in the storage unit 420.
  • the general processing unit implements the functions of the processing unit 410, the input port 430 and the output port 440 by executing the code in the storage unit 420 .
  • the core network device includes a processor, a memory, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the input and output devices are used to receive data from other devices (for example, access network devices or other core network devices) and/or send data to other devices.
  • the processor with processing function can be regarded as the processing unit 410 of the terminal device.
  • the processing unit 410 may also be referred to as a processor, a processing board, a processing module, a processing device, and so on.
  • the receiver, receiver, or receiving circuit, etc. can be regarded as the input port 430.
  • the transmitter, transmitter, or transmission circuit can be regarded as the output port 440.
  • the chip When the communication device 400 is a chip, the chip includes a transceiver circuit and a processing circuit.
  • the transceiver circuit may be an input/output circuit or a communication interface; the processing circuit may be a processor, microprocessor, or integrated circuit integrated on the chip.
  • the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to the transmitter and transmitted by the transmitter, and the input circuit and output
  • the circuit can be a different circuit or the same circuit. In this case, the circuit is used as an input circuit and an output circuit at different times.
  • the input port 430 is used to obtain indication information, and the indication information is used to indicate at least one of the following:
  • the first service corresponding to the terminal device supports or does not support network slice remapping, the first service supports or does not support network slice fallback, the terminal device supports or does not support cell redirection, information about at least one second cell, Information of at least one second access device, information of at least one second network slice,
  • the second cell supports the first network slice
  • the second access device supports the first network slice
  • the second network slice belongs to the supported network slice
  • the processing unit 410 is configured to communicate with the terminal device according to the instruction information.
  • the input port 430 is used to receive the indication information from the terminal device.
  • the processing unit 410 is configured to determine a first processing method that meets the situation indicated by the instruction information from multiple processing methods according to the instruction information;
  • the core network device communicates with the terminal device according to the first processing mode.
  • the multiple processing methods include the following at least two processing methods:
  • the processing unit 410 is configured to determine the first processing mode according to the indication information and the priority of each of the multiple processing modes.
  • the indication information is carried in the session establishment request of the first service.
  • the functions and actions of the modules or units in the apparatus 400 listed above are only exemplary.
  • the modules or units in the apparatus 400 can be used to execute the above methods.
  • Each action or process performed by the core network device for example, core network device #1 or core network device #A.
  • core network device #1 or core network device #A for example, core network device #1 or core network device #A.
  • FIG. 7 is a schematic diagram of a communication device 500 provided in an embodiment of this application.
  • the apparatus 500 may be a terminal device, or a chip or circuit, for example, a chip or circuit that can be provided in a terminal device.
  • the device 500 may include a processing unit 510 (that is, an example of a processing unit), and optionally, may also include a storage unit 520.
  • the storage unit 520 is used to store instructions.
  • the processing unit 510 is configured to execute the instructions stored in the storage unit 520, so that the apparatus 300 implements the steps performed by the terminal device (for example, terminal device #1) in the foregoing method.
  • the device 500 may further include an input port 530 (ie, an example of a communication unit) and an output port 530 (ie, another example of a transceiver unit).
  • the processing unit 510, the storage unit 520, the input port 530, and the output port 530 can communicate with each other through internal connection paths to transfer control and/or data signals.
  • the storage unit 520 is used to store a computer program, and the processing unit 510 can be used to call and run the calculation program from the storage unit 520 to complete the steps of the terminal device in the foregoing method.
  • the storage unit 520 may be integrated in the processing unit 510, or may be provided separately from the processing unit 510.
  • the input port 530 may be a receiver
  • the output port 540 may be a transmitter.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the input port 530 is an input interface
  • the output port 540 is an output interface
  • the functions of the input port 530 and the output port 540 may be implemented by a transceiver circuit or a dedicated chip for transceiver.
  • the processing unit 510 may be implemented by a dedicated processing chip, a processing circuit, a processing unit, or a general-purpose chip.
  • a general-purpose computer may be considered to implement the terminal device provided in the embodiments of the present application.
  • the program codes that realize the functions of the processing unit 510, the input port 530, and the output port 540 are stored in the storage unit 520.
  • the general processing unit implements the functions of the processing unit 510, the input port 530 and the output port 540 by executing the code in the storage unit 520. .
  • the terminal device When the device 500 is a terminal device, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • the memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
  • the processor with processing function can be regarded as the processing unit 510 of the terminal device.
  • the processing unit 510 may also be called a processor, a processing board, a processing module, a processing device, and so on.
  • the receiver, receiver, or receiving circuit, etc. can be regarded as the input port 530.
  • the transmitter, transmitter, or transmitting circuit can be regarded as the output port 540.
  • the chip When the communication device 500 is a chip, the chip includes a transceiver circuit and a processing circuit.
  • the transceiver circuit may be an input/output circuit or a communication interface; the processing circuit may be a processor, microprocessor, or integrated circuit integrated on the chip.
  • the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to the transmitter and transmitted by the transmitter, and the input circuit and output
  • the circuit can be a different circuit or the same circuit. In this case, the circuit is used as an input circuit and an output circuit at different times.
  • the processing unit 510 is configured to generate indication information, where the indication information is used to indicate at least one of the following:
  • the first service corresponding to the terminal device supports or does not support network slice remapping, the first service supports or does not support network slice fallback, the terminal device supports or does not support cell redirection, at least one second cell Information, information of at least one second access device, information of at least one second network slice,
  • the second cell supports the first network slice
  • the second access device supports the first network slice
  • the second network slice belongs to the supported network slice
  • the output port 540 is used to send the instruction information.
  • the indication information is carried in the session establishment request of the first service.
  • the functions and actions of the modules or units in the apparatus 500 listed above are only exemplary.
  • the modules or units in the apparatus 500 can be used to perform the above methods.
  • Each action or process performed by the terminal device for example, terminal device #1.
  • terminal device #1 for example, terminal device #1.
  • detailed descriptions are omitted.
  • FIG. 8 is a schematic structural diagram of a terminal device 600 provided by this application.
  • the foregoing apparatus 300 or 500 may be configured in the terminal device 600, or the foregoing apparatus 300 or 500 itself may be the terminal device 600.
  • the terminal device 600 can perform the actions performed by the terminal device (for example, the terminal device #1 or the terminal device #A) in the foregoing method.
  • FIG. 8 only shows the main components of the terminal device.
  • the terminal device 600 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute the software program, and process the data of the software program. For example, it is used to support the terminal device to execute the above-mentioned transmission precoding matrix instruction method embodiment.
  • the memory is mainly used to store software programs and data, for example, to store the codebook described in the above embodiments.
  • the control circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 8 only shows a memory and a processor. In actual terminal devices, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processing unit is mainly used to control the entire terminal device, execute software programs, and process software programs. data.
  • the processor in FIG. 8 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors and are interconnected by technologies such as a bus.
  • the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and the various components of the terminal device may be connected through various buses.
  • the baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and the communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and the control circuit with the transceiving function may be regarded as the transceiving unit 610 of the terminal device 600, and the processor with the processing function may be regarded as the processing unit 620 of the terminal device 600.
  • the terminal device 600 includes a transceiving unit 610 and a processing unit 620.
  • the transceiver unit may also be called a transceiver, transceiver, transceiver, and so on.
  • the device for implementing the receiving function in the transceiving unit 610 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiving unit 610 can be regarded as the sending unit, that is, the transceiving unit includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the embodiment of the present application also provides a communication system, which includes one or more of the aforementioned terminal devices and network devices.
  • the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integration Circuit (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • Access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).
  • the foregoing embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination.
  • the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions or computer programs.
  • the computer instructions or computer programs are loaded or executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium.
  • the semiconductor medium may be a solid state drive.
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请提供了一种通信方法和通信装置，该通信方法包括：终端设备接收第一信息，所述第一信息用于指示至少一个支持的网络切片，所述至少一个支持的网络切片包括第一小区支持的网络切片和/或第一接入设备支持的网络切片，所述第一小区包括所述终端设备当前接入的小区，所述第一接入设备包括所述终端设备当前接入的接入设备；所述终端设备接收第二信息，所述第二信息用于指示至少一个允许的网络切片；所述终端设备根据所述第一信息和所述第二信息，处理第一业务的会话建立请求，从而，能够减小用于传输会话建立请求的资源的浪费。

Description

通信方法和通信装置
本申请要求于2020年5月28日提交中国专利局、申请号为202010466918.0、申请名称为“通信方法和通信装置”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
本申请实施例涉及通信领域，并且更具体地，涉及通信方法和通信装置。
背景技术
目前，已知一种网络切片技术，可以将单一物理网络划分成多个网络切片(或者说，虚拟网络)，不同的网络切片可以提供不同的业务，从而，能够实现通过单一的物理网络提供多种业务。
在该技术中，当终端设备需要访问某一业务时，可以发起该业务的会话，例如，协议数据单元(protocol data unit，PDU)会话，并且，在会话建立请求中可以携带该业务对应的网络切片的标识。
从而，网络设备可以根据PDU会话中携带的网络切片的标识，为终端设备配置资源。
但是，在例如终端设备当前处于的小区不支持该网络切片或者终端设备当前处于的网络不允许终端设备使用该网络切片的情况下，无法基于该会话建立请求建立会话连接，造成了用于传输该会话建立请求的资源的浪费。
发明内容
本申请提供了通信方法和通信装置，能够减少资源浪费。
第一方面，提供一种通信方法，包括：终端设备接收第一信息，所述第一信息用于指示至少一个支持的网络切片，所述至少一个支持的网络切片包括第一小区支持的网络切片和/或第一接入设备支持的网络切片，所述第一小区包括所述终端设备当前接入的小区，所述第一接入设备包括所述终端设备当前接入的接入设备；所述终端设备接收第二信息，所述第二信息用于指示至少一个允许的网络切片；所述终端设备根据所述第一信息和所述第二信息，处理第一业务的会话建立请求。
根据本申请的方案，通过使终端设备获取当前接入的小区或接入设备支持的网络切片的第一信息，以及该终端设备的允许的网络切片的信息，终端设备可以预先判断当前需要访问的业务的网络切片是否属于当前接入的小区或接入设备支持的网络切片以及允许的网络切片的信息，从而，终端设备可以根据判定结果，处理会话建立请求，从而能够减少资源浪费。
例如，所述终端设备根据所述第一信息和所述第二信息，处理第一业务的会话建立请求，包括：如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则发送第一业务的会话建立请求，其中，所述第一网络切片 包括所述第一业务对应的网络切片。
从而，能够确保该第一业务的会话能够承载于第一网络切片，或者说，能够确保网络设备能够基于该会话建立请求，根据该第一网络切片的标识，为终端设备配置资源。
或者，如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则停止第一业务的会话建立请求。
由于，终端设备无法通过该网络切片#1访问业务#1，因此，通过停止发送会话建立请求，能够避免用于传输该会话建立请求的资源浪费。
或者，如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则发送第三信息，所述第三信息用于指示以下至少一项：所述第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片。
例如，当第三信息用于指示所述第一业务是否支持(或者说，支持或不支持)网络切片重映射时，网络设备(例如，核心网设备)可以根据第三指示信息确定是否采用将第一业务重映射至其他网络切片(例如，第三网络切片)的方式进行处理。
可选地，该第三网络切片属于允许的网络切片，且该第三网络切片属于第一小区或第一接入设备支持的网络切片。
从而，能够减小终端设备对第一业务的访问时延，避免因核心网设备查询该第一业务是否支持网络切片重映射而导致的资源开销。
再例如，当第三信息用于指示所述第一业务是否支持网络切片回退时，网络设备可以根据第三指示信息确定是否采用将第一业务所重映射至需要回退至的网络切片(例如，第四网络切片)的方式进行处理。
其中，该第四网络切片可以是网络设备为终端设备预先配置的用于网络切片回退处理的网络切片，或者说，该第四网络切片可以是网络设备为终端设备预先配置的在进行网络切片回退处理是需要回退至的目标网络切片。
可选地，该第三网络切片属于第一小区或第一接入设备支持的网络切片。
从而，能够减小终端设备对第一业务的访问时延，避免因核心网设备查询该第一业务是否支持网络切片回退而导致的资源开销。
再例如，当第三信息用于指示所述终端设备是否支持小区重定向时，网络设备可以根据第三指示信息确定是否采用将所述终端设备重定向至其他小区(例如，第三小区)的方式进行处理。
可选地，该第三小区支持该第一网络切片。
从而，能够减小终端设备对第一业务的访问时延，避免因核心网设备查询该终端设备是否支持小区重定向而导致的资源开销。
再例如，当第三信息用于指示至少一个第二小区的信息，其中，所述第二小区支持所述第一网络切片时，网络设备可以根据第三指示信息将所述终端设备重定向至第二小区。
从而，能够使终端设备通过第二小区使用第一网络切片访问第一业务，进而能够减小 终端设备对第一业务的访问时延。
再例如，当第三信息用于指示至少一个第二接入设备的信息，其中，所述第二接入设备支持所述第一网络切片时，网络设备可以根据第三指示信息将所述终端设备重定向至第二接入设备。
从而，能够使终端设备通过第二接入设备使用第一网络切片访问第一业务，进而能够减小终端设备对第一业务的访问时延。
再例如，当第三信息用于指示至少一个第二网络切片的信息，其中，所述第二网络切片属于所述支持的网络切片时，网络设备可以根据第三指示信息将所述第一业务重映射至第二网络切片。
从而，能够使终端设备通过第一接入设备使用第二网络切片访问第一业务，进而能够减小终端设备对第一业务的访问时延。
可选地，终端设备接收第一信息包括：所述终端设备的接入AS层接收所述第一信息；
所述终端设备接收第二信息，包括：所述终端设备的非接入NAS层接收所述第二信息。
可选地，所述方法还包括：所述终端设备的AS层向所述终端设备的NAS层发送至少一个支持的网络切片的信息；所述终端设备的NAS层判定第一网络切片是否属于所述至少一个支持的网络切片，其中，所述第一网络切片包括所述第一业务对应的网络切片；所述终端设备的NAS层判定第一网络切片是否属于所述至少一个允许的网络切片。
例如，如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则NAS层可以生成第一业务的会话建立请求，并将第一业务的会话建立请求发送给AS层，AS层可以将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
再例如，如果第一网络切片不属于所述至少一个支持的网络切片，和/或第一网络切片属于所述至少一个允许的网络切片，则NAS层可以不生成第一业务的会话建立请求，或者，NAS层可以停止向AS层发送第一业务的会话建立请求。
例如，如果第一网络切片不属于所述至少一个支持的网络切片，和/或第一网络切片属于所述至少一个允许的网络切片，则NAS层可以生成第一业务的会话建立请求，其中，该会话建立请求携带上述第三信息，并将第一业务的会话建立请求发送给AS层，AS层可以将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
通过在NAS层进行判定，能够减小AS层的处理负担。
可选地，所述方法还包括：所述终端设备的NAS层向所述终端设备的AS层发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片；当所述第一网络切片属于所述至少一个允许的网络切片时，所述终端设备的NAS层向所述终端设备的AS层发送所述第一业务的会话建立请求；当第一网络切片属于所述至少一个支持的网络切片时，所述终端设备的AS层发送所述第一业务的会话建立请求。
从而，能够减小从判定到发送会话建立请求的时延，进一步提高本申请的效果。
例如，如果第一网络切片属于所述至少一个支持的网络切片，则AS层可以将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
再例如，如果第一网络切片不属于所述至少一个支持的网络切片，则AS层可以停止 发送第一业务的会话建立请求。
另外，如果第一网络切片不属于所述至少一个支持的网络切片，则AS层可以向NAS层发送反馈信息，NAS层可以根据该反馈信息，不再生成第一业务的会话建立请求，或者，NAS层可以停止向AS层发送第一业务的会话建立请求。
或者，如果第一网络切片不属于所述至少一个支持的网络切片，则AS层可以向NAS层发送反馈信息，NAS层可以根据该反馈信息，生成第一业务的会话建立请求，其中，该会话建立请求携带上述第三信息，并将第一业务的会话建立请求发送给AS层，AS层可以将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
可选地，所述方法还包括：所述终端设备的NAS层向所述终端设备的AS层发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片。
当所述第一网络切片属于所述至少一个允许的网络切片时，所述终端设备的NAS层向所述终端设备的AS层发送所述第一业务的会话建立请求。
当第一网络切片不属于所述至少一个支持的网络切片时，所述终端设备的AS层向所述终端设备的NAS层发送反馈信息，所述反馈信息用于指示第一网络切片不属于所述至少一个支持的网络切片。
此情况下，NAS层可以根据该反馈信息，不再生成第一业务的会话建立请求，或者，NAS层可以停止向AS层发送第一业务的会话建立请求
或者，NAS层可以根据该反馈信息，生成第一业务的会话建立请求，其中，该会话建立请求携带上述第三信息，并将第一业务的会话建立请求发送给AS层，AS层可以将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
可选地，所述方法还包括：所述终端设备的NAS层向所述终端设备的AS层发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片；所述终端设备的NAS层向所述终端设备的AS层发送至少一个允许的网络切片的信息；所述终端设备的NAS层向所述终端设备的AS层发送所述第一业务的会话建立请求。
如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则所述终端设备的AS层发送所述第一业务的会话建立请求。
如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，所述终端设备的AS层向所述终端设备的NAS层发送反馈信息，所述反馈信息用于指示第一网络切片不属于所述至少一个支持的网络切片。
此情况下，NAS层可以根据该反馈信息，不再生成第一业务的会话建立请求，或者，NAS层可以停止向AS层发送第一业务的会话建立请求
或者，NAS层可以根据该反馈信息，生成第一业务的会话建立请求，其中，该会话建立请求携带上述第三信息，并将第一业务的会话建立请求发送给AS层，AS层可以将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
通过在AS层进行判定，能够减小NAS层的处理负担。
第二方面，提供一种通信方法，包括：核心网设备获取指示信息，所述指示信息用于指示以下至少一项：终端设备对应的第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，其中，所述第 二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片；所述核心网设备根据所述指示信息与所述终端设备通信。
根据本申请的方案，通过使核心网设备获取上述指示信息，能够在终端设备当前接入的小区或接入设备不支持终端请求访问的第一业务对应的第一网络切片时，根据该指示信息，控制终端设备，减少资源开销。
可选地，核心网设备获取指示信息包括：核心网设备从所述终端设备接收所述指示信息。
具体地，终端设备可以判定当前接入的小区或接入设备是否支持第一网络切片，并且，当判定不支持时，发送该指示信息。
或者，终端设备也可以不进行上述判定，直接向核心网设备发送该指示信息。
可选地，上述指示信息可以作为终端设备的网络切片订阅信息存储于例如，统一数据管理(unified data management，UDM)网元等网络设备。
从而，核心网设备可以从例如，UDM等网络设备获取该指示信息。
可选地，核心网设备还可以判定当前接入的小区或接入设备是否支持第一网络切片，并且，当判定不支持时根据上述指示信息，控制终端设备。
可选地，在本申请中，核心网络设备可以根据指示信息指示的具体内容，采用不同的处理方式。
即，所述核心网设备根据所述指示信息与所述终端设备通信，包括：
所述核心网设备根据所述指示信息，从多种处理方式中确定符合所述指示信息指示的情况的第一处理方式；
所述核心网设备根据所述第一处理方式与所述终端设备通信。
其中，所述多种处理方式包括以下至少两种处理方式：
方式1.对所述第一业务进行网络切片重映射；
具体地，当指示信息用于指示所述第一业务是否支持(或者说，支持或不支持)网络切片重映射时，网络设备(例如，核心网设备)可以根据第三指示信息确定是否采用将第一业务重映射至其他网络切片(例如，第三网络切片)的方式进行处理。
可选地，该第三网络切片属于允许的网络切片，且该第三网络切片属于第一小区或第一接入设备支持的网络切片。
从而，能够减小终端设备对第一业务的访问时延，避免因核心网设备查询该第一业务是否支持网络切片重映射而导致的资源开销。
方式2.对所述第一业务进行网络切片回退；
具体地，当指示信息用于指示所述第一业务是否支持网络切片回退时，核心网设备可以根据第三指示信息确定是否采用将第一业务所重映射至需要回退至的网络切片(例如，第四网络切片)的方式进行处理。
其中，该第四网络切片可以是网络设备为终端设备预先配置的用于网络切片回退处理的网络切片，或者说，该第四网络切片可以是网络设备为终端设备预先配置的在进行网络切片回退处理是需要回退至的目标网络切片。
可选地，该第三网络切片属于第一小区或第一接入设备支持的网络切片。
从而，能够减小终端设备对第一业务的访问时延，避免因核心网设备查询该第一业务 是否支持网络切片回退而导致的资源开销。
方式3.
对所述终端设备进行小区重定向；
具体地，当指示信息用于指示所述终端设备是否支持小区重定向时，核心网设备可以根据第三指示信息确定是否采用将所述终端设备重定向至其他小区(例如，第三小区)的方式进行处理。
可选地，该第三小区支持该第一网络切片。
从而，能够减小终端设备对第一业务的访问时延，避免因核心网设备查询该终端设备是否支持小区重定向而导致的资源开销。
方式4.将所述终端设备重定向至所述第二小区；
具体地，当指示信息用于指示至少一个第二小区的信息，其中，所述第二小区支持所述第一网络切片时，核心网设备可以根据第三指示信息将所述终端设备重定向至第二小区。
从而，能够使终端设备通过第二小区使用第一网络切片访问第一业务，进而能够减小终端设备对第一业务的访问时延。
方式5.将所述终端设备重定向至所述第二接入设备的小区。
具体地，当指示信息用于指示至少一个第二接入设备的信息，其中，所述第二接入设备支持所述第一网络切片时，核心网设备可以根据第三指示信息将所述终端设备重定向至第二接入设备。
从而，能够使终端设备通过第二接入设备使用第一网络切片访问第一业务，进而能够减小终端设备对第一业务的访问时延。
方式6.将所述第一业务重映射至所述第二网络切片；
具体地，当指示信息用于指示至少一个第二网络切片的信息，其中，所述第二网络切片属于所述支持的网络切片时，核心网设备可以根据第三指示信息将所述第一业务重映射至第二网络切片。
从而，能够使终端设备通过第一接入设备使用第二网络切片访问第一业务，进而能够减小终端设备对第一业务的访问时延。
可选地，所述核心网设备根据所述指示信息，从多种处理方式中确定符合所述指示信息指示的情况的第一处理方式，包括：所述核心网设备根据所述指示信息和所述多种处理方式中每种处理方式的优先级，确定所述第一处理方式。
可选地，所述指示信息承载于所述第一业务的会话建立请求。
第三方面，提供一种通信方法，包括：终端设备生成指示信息，所述指示信息用于指示以下至少一项：所述终端设备对应的第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片；所述终端设备发送所述指示信息。
根据本申请的方案，通过使终端设备向核心网设备发送上述指示信息，能够在终端设备当前接入的小区或接入设备不支持终端请求访问的第一业务对应的第一网络切片时，根 据该指示信息，控制终端设备，减少资源开销。
可选地，在所述终端设备发送所述指示信息之前，所述方法还包括：
所述终端设备接收第一信息，所述第一信息用于指示至少一个支持的网络切片，所述至少一个支持的网络切片包括第一小区支持的网络切片和/或第一接入设备支持的网络切片，所述第一小区包括所述终端设备当前接入的小区，所述第一接入设备包括所述终端设备当前接入的接入设备；
根据所述第一信息，确定所述第一网络切片不属于所述支持的网络切片。
可选地，所述指示信息承载于所述第一业务的会话建立请求。
第四方面，提供一种通信装置，包括：收发单元，用于接收第一信息，所述第一信息用于指示至少一个支持的网络切片，所述至少一个支持的网络切片包括第一小区支持的网络切片和/或第一接入设备支持的网络切片，所述第一小区包括终端设备当前接入的小区，所述第一接入设备包括所述终端设备当前接入的接入设备；所述终端设备接收第二信息，所述第二信息用于指示至少一个允许的网络切片；处理单元，用于根据所述第一信息和所述第二信息，处理第一业务的会话建立请求。
根据本申请的方案，通过使终端设备获取当前接入的小区或接入设备支持的网络切片的第一信息，以及该终端设备的允许的网络切片的信息，终端设备可以预先判断当前需要访问的业务的网络切片是否属于当前接入的小区或接入设备支持的网络切片以及允许的网络切片的信息，从而，终端设备可以根据判定结果，处理会话建立请求，进而能够减小业务访问时延，降低资源开销。
例如，所述处理单元具体用于如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则发送第一业务的会话建立请求，其中，所述第一网络切片包括所述第一业务对应的网络切片。
或者，所述处理单元具体用于如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则停止第一业务的会话建立请求。
或者，所述处理单元用于如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则发送第三信息，所述第三信息用于指示以下至少一项：所述第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片。
可选地，所述收发单元包括接入AS层处理当和非接入NAS层处理单元。
可选地，所述AS层处理单元用于从所述收发单元获取并解析所述第一信息，所述NAS层处理单元用于从所述收发单元获取并解析所述第二信息。
可选地，所述AS层处理单元用于向所述NAS层处理单元发送至少一个支持的网络切片的信息，所述NAS层处理单元用于判定第一网络切片是否属于所述至少一个支持的网络切片，其中，所述第一网络切片包括所述第一业务对应的网络切片；所述终端设备的NAS层判定第一网络切片是否属于所述至少一个允许的网络切片。
可选地，所述NAS层处理单元具体用于如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则生成第一业务的会话建立请求，并将第一业务的会话建立请求发送给所述AS层处理单元，所述AS层处理单元用于控制所述收发器将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
可选地，所述NAS层处理单元用于如果第一网络切片不属于所述至少一个支持的网络切片，和/或第一网络切片属于所述至少一个允许的网络切片，则不生成第一业务的会话建立请求，或者，停止向AS层处理单元发送第一业务的会话建立请求。
可选地，所述NAS层处理单元具体用于如果第一网络切片不属于所述至少一个支持的网络切片，和/或第一网络切片属于所述至少一个允许的网络切片，则生成第一业务的会话建立请求，其中，该会话建立请求携带上述第三信息，并将第一业务的会话建立请求发送给AS层处理单元，所述AS层处理单元用于控制所述收发器将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
可选地，所述NAS层处理单元向所述AS层处理单元发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片，所述NAS层处理单元用于当所述第一网络切片属于所述至少一个允许的网络切片时，向所述AS层从处理单元发送所述第一业务的会话建立请求，所述AS层处理单元用于当第一网络切片属于所述至少一个支持的网络切片时，控制所述收发单元发送所述第一业务的会话建立请求。
可选地，所述AS层处理单元用于如果第一网络切片属于所述至少一个支持的网络切片，则控制所述收发单元将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
可选地，所述AS层处理单元用于如果第一网络切片不属于所述至少一个支持的网络切片，则控制所述收发单元停止发送第一业务的会话建立请求。
可选地，所述处理单元用于如果第一网络切片不属于所述至少一个支持的网络切片，则所述处理单元在AS层向NAS层发送反馈信息，在NAS层根据该反馈信息，不再生成第一业务的会话建立请求，或者，在NAS层停止向AS层发送第一业务的会话建立请求。
可选地，所述AS层处理单元用于如果第一网络切片不属于所述至少一个支持的网络切片，则向NAS层处理单元发送反馈信息，所述NAS层处理单元用于根据该反馈信息，生成第一业务的会话建立请求，其中，该会话建立请求携带上述第三信息，并将第一业务的会话建立请求发送给AS层处理单元，所述AS层处理单元用于控制所述收发单元将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
可选地，所述NAS层处理单元用于向AS层处理单元发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片。
并且，所述NAS层处理单元用于当所述第一网络切片属于所述至少一个允许的网络切片时，向AS层处理单元发送所述第一业务的会话建立请求。
所述AS层处理单元用于当第一网络切片不属于所述至少一个支持的网络切片时，向NAS层处理单元发送反馈信息，所述反馈信息用于指示第一网络切片不属于所述至少一个支持的网络切片。
此情况下，所述NAS层处理单元用于根据该反馈信息不再生成第一业务的会话建立 请求，或者，停止向AS层处理器发送第一业务的会话建立请求
或者，所述NAS层处理单元用于根据该反馈信息，生成第一业务的会话建立请求，其中，该会话建立请求携带上述第三信息，并将第一业务的会话建立请求发送给AS层处理单元，并且，所述AS层处理单元用于控制收发单元将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
可选地，所述NAS层处理单元用于向AS层处理单元发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片；所述NAS层处理单元用于向AS层处理单元发送至少一个允许的网络切片的信息；所述NAS层处理单元用于向AS层处理单元发送所述第一业务的会话建立请求。
如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则所述AS层处理单元控制所述收发单元发送所述第一业务的会话建立请求。
如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，所述AS层处理单元向所述NAS层处理单元发送反馈信息，所述反馈信息用于指示第一网络切片不属于所述至少一个支持的网络切片。
此情况下，NAS层处理单元根据该反馈信息，不再生成第一业务的会话建立请求，或者，停止向AS层处理单元发送第一业务的会话建立请求
或者，NAS层处理单元根据该反馈信息，生成第一业务的会话建立请求，其中，该会话建立请求携带上述第三信息，并将第一业务的会话建立请求发送给AS层处理单元，AS层处理单元控制收发单元将该第一业务的会话建立请求(例如，通过接入网设备)发送给核心网设备。
通过在AS层处理单元进行判定，能够减小NAS层处理单元的处理负担。
其中，该装置中的各单元分别用于执行上述第一方面及其任意一种实现方式中的通信方法的各步骤。
在一种设计中，该装置为通信芯片，通信芯片可以包括用于发送信息或数据的输入电路或者接口，以及用于接收信息或数据的输出电路或者接口。
在另一种设计中，该装置为通信设备，通信设备可以包括用于发送信息或数据的发射机，以及用于接收信息或数据的接收机。
应理解，以上列举的处理单元包括NAS层处理单元和AS层处理单元的方案仅为示例性说明，本申请并未限定于此，也可以由同一个处理单元执行NAS层处理单元和AS层处理单元双方的动作。
第五方面，提供一种通信装置，包括：收发单元，用于与终端设备通信；处理单元，用于获取指示信息，所述指示信息用于指示以下至少一项：终端设备对应的第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片，并用于根据所述指示信息控制所述收发单元与所述终端设备通信。
根据本申请的方案，通过使核心网设备获取上述指示信息，能够在终端设备当前接入 的小区或接入设备不支持终端请求访问的第一业务对应的第一网络切片时，根据该指示信息，控制终端设备，减少资源开销。
可选地，所述收发单元用于从所述终端设备接收所述指示信息。
具体地，终端设备可以判定当前接入的小区或接入设备是否支持第一网络切片，并且，当判定不支持时，发送该指示信息。
或者，终端设备也可以不进行上述判定，直接向核心网设备发送该指示信息。
可选地，上述指示信息可以作为终端设备的网络切片订阅信息存储于例如，统一数据管理(unified data management，UDM)等网络设备。
从而，所述收发单元用于从例如，UDM等网络设备接收该指示信息。
可选地，所述处理单元还用于判定当前接入的小区或接入设备是否支持第一网络切片，并且，当判定为不支持时，根据上述指示信息，控制终端设备。
可选地，在本申请中，核心网络设备可以根据指示信息指示的具体内容，采用不同的处理方式。
即，所述处理单元用于根据所述指示信息，从多种处理方式中确定符合所述指示信息指示的情况的第一处理方式，并根据所述第一处理方式与所述终端设备通信。
其中，所述多种处理方式包括以下至少两种处理方式：
方式1.对所述第一业务进行网络切片重映射；
具体地，当指示信息用于指示所述第一业务是否支持(或者说，支持或不支持)网络切片重映射时，处理单元可以根据第三指示信息确定是否采用将第一业务重映射至其他网络切片(例如，第三网络切片)的方式进行处理。
可选地，该第三网络切片属于允许的网络切片，且该第三网络切片属于第一小区或第一接入设备支持的网络切片。
从而，能够减小终端设备对第一业务的访问时延，避免因核心网设备查询该第一业务是否支持网络切片重映射而导致的资源开销。
方式2.对所述第一业务进行网络切片回退；
具体地，当指示信息用于指示所述第一业务是否支持网络切片回退时，处理单元可以根据第三指示信息确定是否采用将第一业务所重映射至需要回退至的网络切片(例如，第四网络切片)的方式进行处理。
其中，该第四网络切片可以是网络设备为终端设备预先配置的用于网络切片回退处理的网络切片，或者说，该第四网络切片可以是网络设备为终端设备预先配置的在进行网络切片回退处理是需要回退至的目标网络切片。
可选地，该第三网络切片属于第一小区或第一接入设备支持的网络切片。
从而，能够减小终端设备对第一业务的访问时延，避免因核心网设备查询该第一业务是否支持网络切片回退而导致的资源开销。
方式3.
对所述终端设备进行小区重定向；
具体地，当指示信息用于指示所述终端设备是否支持小区重定向时，处理单元可以根据第三指示信息确定是否采用将所述终端设备重定向至其他小区(例如，第三小区)的方式进行处理。
可选地，该第三小区支持该第一网络切片。
从而，能够减小终端设备对第一业务的访问时延，避免因核心网设备查询该终端设备是否支持小区重定向而导致的资源开销。
方式4.将所述终端设备重定向至所述第二小区；
具体地，当指示信息用于指示至少一个第二小区的信息，其中，所述第二小区支持所述第一网络切片时，处理单元可以根据第三指示信息将所述终端设备重定向至第二小区。
从而，能够使终端设备通过第二小区使用第一网络切片访问第一业务，进而能够减小终端设备对第一业务的访问时延。
方式5.将所述终端设备重定向至所述第二接入设备的小区。
具体地，当指示信息用于指示至少一个第二接入设备的信息，其中，所述第二接入设备支持所述第一网络切片时，处理单元可以根据第三指示信息将所述终端设备重定向至第二接入设备。
从而，能够使终端设备通过第二接入设备使用第一网络切片访问第一业务，进而能够减小终端设备对第一业务的访问时延。
方式6.将所述第一业务重映射至所述第二网络切片；
具体地，当指示信息用于指示至少一个第二网络切片的信息，其中，所述第二网络切片属于所述支持的网络切片时，处理单元可以根据第三指示信息将所述第一业务重映射至第二网络切片。
从而，能够使终端设备通过第一接入设备使用第二网络切片访问第一业务，进而能够减小终端设备对第一业务的访问时延。
可选地，所述核心网设备根据所述指示信息，从多种处理方式中确定符合所述指示信息指示的情况的第一处理方式，包括：所述核心网设备根据所述指示信息和所述多种处理方式中每种处理方式的优先级，确定所述第一处理方式。
可选地，所述指示信息承载于所述第一业务的会话建立请求。
其中，该装置中的各单元分别用于执行上述第二方面及其任意一种实现方式中的通信方法的各步骤。
在一种设计中，该装置为通信芯片，通信芯片可以包括用于发送信息或数据的输入电路或者接口，以及用于接收信息或数据的输出电路或者接口。
在另一种设计中，该装置为通信设备，通信设备可以包括用于发送信息或数据的发射机，以及用于接收信息或数据的接收机。
第六方面，提供一种通信装置，包括：处理单元，用于生成指示信息，所述指示信息用于指示以下至少一项：所述终端设备对应的第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片；收发单元，用于发送所述指示信息。
根据本申请的方案，通过使终端设备向核心网设备发送上述指示信息，能够在终端设备当前接入的小区或接入设备不支持终端请求访问的第一业务对应的第一网络切片时，根据该指示信息，控制终端设备，减少资源开销。
可选地，所述收发单元还用于接收第一信息，所述第一信息用于指示至少一个支持的网络切片，所述至少一个支持的网络切片包括第一小区支持的网络切片和/或第一接入设备支持的网络切片，所述第一小区包括所述终端设备当前接入的小区，所述第一接入设备包括所述终端设备当前接入的接入设备；
所述处理单元用于根据所述第一信息，确定所述第一网络切片不属于所述支持的网络切片。
可选地，所述指示信息承载于所述第一业务的会话建立请求。
其中，该装置中的各单元分别用于执行上述第三方面及其任意一种实现方式中的通信方法的各步骤。
在一种设计中，该装置为通信芯片，通信芯片可以包括用于发送信息或数据的输入电路或者接口，以及用于接收信息或数据的输出电路或者接口。
在另一种设计中，该装置为通信设备，通信设备可以包括用于发送信息或数据的发射机，以及用于接收信息或数据的接收机。
第七方面，提供了一种通信设备，包括，处理器，处理器与存储器耦合，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该通信设备执行第一方面至第三方面中的任一方面及其各种实现方式中的通信方法。
可选地，处理器为一个或多个，存储器为一个或多个。
可选地，存储器可以与处理器集成在一起，或者存储器与处理器分离设置。
可选地，该通信设备还包括，发射机(发射器)和接收机(接收器)。
第八方面，提供了一种通信系统包括网络设备和终端设备。
其中，终端设备用于执行上述第一方面或第三方面及其各实现方式的方法，网络设备(例如，核心网设备)用于执行上述第二方面及其各实现方式的方法。
在一个可能的设计中，该通信系统还可以包括本申请实施例提供的方案中与网络设备或终端设备进行交互的其他设备，例如，接入网设备。
第九方面，提供了一种计算机程序产品，计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当计算机程序被运行时，使得计算机执行上述第一方面至第三方面中的任一方面及其可能实现方式中的方法。
第十方面，提供了一种计算机可读介质，计算机可读介质存储有计算机程序(也可以称为代码，或指令)当其在计算机上运行时，使得计算机执行上述第一方面至第三方面中的任一方面及其可能实现方式中的方法。
第十一方面，提供了一种芯片系统，包括存储器和处理器，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得安装有该芯片系统的通信设备执行上述第一方面至第三方面中的任一方面及其可能实现方式中的方法。
其中，该芯片系统可以包括用于发送信息或数据的输入电路或者接口，以及用于接收信息或数据的输出电路或者接口。
附图说明
图1是本申请实施例适用的通信系统的架构图。
图2是本申请实施例适用的通信协议层的示意图。
图3是本申请的发起会话建立请求的过程的一例的示意性交互图。
图4是本申请的发起会话建立请求的过程的另一例的示意性交互图。
图5是本申请的通信装置的一例的示意图。
图6是本申请的通信装置的另一例的示意图。
图7是本申请的通信装置的再一例的示意图。
图8是本申请的终端设备的一例的示意图
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、第五代(5th generation，5G)系统、未来的第六代(6th generation，6G)或新无线(new radio，NR)等。
下面结合图1对本申请的通信系统的结构进行说明。
如图1所示，该通信系统包括但不限于以下网元：
1、终端设备
本申请实施例中的终端设备也可以称为：用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置等。
终端设备可以是一种向用户提供语音/数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。目前，一些终端的举例为：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功 能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。此外，在本申请实施例中，终端设备还可以是物联网(internet of things，IoT)系统中的终端设备。
另外，在本申请实施例中，终端设备还可与其他通信系统的终端设备进行通信，例如，设备间通信等。例如，该终端设备还可以与其他通信系统的终端设备进行时间同步报文的传输(例如，发送和/或接受)。
2、接入设备
另外，本申请实施例中的接入设备可以是用于与终端设备通信的设备，该接入设备也可以称为接入网设备或无线接入网设备，例如，接入设备可以是LTE系统中的演进型基站(evolved NodeB，eNB或eNodeB)，还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器，或者该接入设备可以为中继站、接入点、车载设备、可穿戴设备以及5G网络中的接入设备或者未来演进的PLMN网络中的接入设备等，可以是WLAN中的接入点(access point，AP)，可以是NR系统中的gNB本申请实施例并不限定。
另外，在本申请实施例中，接入设备是RAN中的设备，或者说，是将终端设备接入到无线网络的RAN节点。例如，作为示例而非限定，作为接入设备，可以列举：gNB、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 NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)，或无线保真(wireless fidelity，Wifi)接入点(access point，AP)等。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、或者控制面CU节点(CU-CP节点)和用户面CU节点(CU-UP节点)以及DU节点的RAN设备。
接入设备为小区提供服务，终端设备通过该小区使用的传输资源(例如，频域资源，或者说，频谱资源)与接入设备进行通信，该小区可以是接入设备(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(small cell)对应的基站，这里的小小区可以包括：城市小区(metro cell)、微小区(micro cell)、微微小区(pico cell)、毫微微小区(femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。
此外，LTE系统或5G系统中的载波上可以同时有多个小区同频工作，在某些特殊场景下，也可以认为上述载波与小区的概念等同。例如在载波聚合(carrier aggregation，CA)场景下，当为UE配置辅载波时，会同时携带辅载波的载波索引和工作在该辅载波的辅小区的小区标识(cell indentification，Cell ID)，在这种情况下，可以认为载波与小区的概念等同，比如终端设备接入一个载波和接入一个小区是等同的。
本申请的通信系统还可以适用于车联网(vehicle to everything，V2X)技术，即，本申请的终端设备还可以是汽车，例如，智能汽车或自动驾驶汽车。
V2X中的“X”代表不同的通信目标，V2X可以包括但不限于：汽车对汽车(vehicle  to vehicl，V2V)，汽车对路标设(vehicle to infrastructure，V2I)，汽车对网络(vehicle to network，V2N)，和汽车对行人(vehicle to pedestrian，V2P)。
在V2X中，接入设备可以为UE配置“区域(zone)”。其中，该区域也可以称为地理区域。当区域配置了以后，世界将被分成多个区域，这些区域由参考点、长、宽来进行定义。UE在进行区域标识(identifier，ID)确定的时候，会使用区域的长、宽、长度上面的区域数量、宽度上面的区域数量以及参考点进行余的操作。上述信息可以由接入设备进行配置。
3、接入管理功能实体
接入管理功能实体主要用于移动性管理和接入管理等，可以用于实现LTE系统中移动性管理实体(mobility management entity，MME)功能中除会话管理之外的其它功能，例如，合法监听以及接入授权/鉴权等功能。
在5G通信系统中，该接入管理网元可以是接入管理功能(access and mobility management function，AMF)实体。
在未来通信系统中，接入管理功能实体仍可以是AMF实体，或者，还可以有其它的名称，本申请不做限定。
4、会话管理功能实体
会话管理功能(session management function，SMF)实体主要用于会话管理、终端设备的网络互连协议(internet protocol，IP)地址分配和管理、选择可管理用户平面功能、策略控制和收费功能接口的终结点以及下行数据通知等。
在未来通信系统中，会话管理网元仍可以是SMF实体，或者，还可以有其它的名称，本申请不做限定。
5.统一数据管理实体
统一数据管理实体(unified data management，UDM)负责前台数据的同一处理，包括用户标识、用户签约数据、鉴权数据等。
需要说明的是，上述“实体”也可以称为网元、设备、装置或模块等，本申请并未特别限定。并且，在本申请中，为了便于理解和说明，在对部分描述中省略“实体”这一描述，例如，将SMF实体简称SMF，此情况下，该“SMF”应理解为SMF网元或SMF实体，以下，省略对相同或相似情况的说明。
可以理解的是，上述实体或者功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。
应理解，以上列举的通信系统包括的网元或实体仅为示例性说明，本申请并未特别限定。例如，通信系统还可以包括但不限于应用功能(application function，AF)、网络能力开放功能实体(network exposure function，NEF)实体、用户面功能(user plane function，UPF)实体、数据网络(data network，DN)、策略控制功能(policy control function，PCF)实体等。
图2示出了本申请的通信系统的协议层架构的示意图，如图2所示，终端设备的协议层可以包括接入层(access stratum AS)和非接入层(non-access stratum NAS)。
所谓接入层和非接入层实际是从协议栈的角度出发的。
在协议栈中，与无线接入无关的高层协议模块我们通称为NAS层，如图2所示，NAS 层存在于UE和核心网(core network，CN)中，主要处理与业务相关的功能。非接入层是指只有UE和CN需要处理的信令层面，无线接入网络，例如RNC、NodeB只是透传，是不需要处理的信令层面。
非接入层的流程主要包括电路域的移动性管理，电路域的呼叫控制，分组域的移动性管理、分组域的会话管理等。
作为示例而非限定，NAS层主要用于用户身份注册与认证管理、移动性管理、呼叫服务管理、呼叫参数设置等。
在协议栈中，无线资源控制(Radio Resource Control，RRC)层和无线接入网络应用协议(radio access network application protocol，RANAP)层及其以下的协议层称为接入层。即，AS层是指无线接入层的设备例如，RNC、NodeB需要参与处理的信令层面。如图2所示接入层的通讯协议都与无线接入相关，AS层存在于UE和RNC中。
接入层的流程主要包括：PLMN选择、小区选择和无线资源管理流程等。
作为示例而非限定，AS层主要用于无线资源管理、服务质量(quality of service，QoS)控制、无线信道传输格式设置、业务数据分割组装、安全处理等。
协议栈的层面上来说，接入层的流程都是一些底层的流程，通过它们为上层的信令流程搭建底层的承载。
非接入层的流程主要包括电路域的移动性管理、电路域的呼叫控制、分组域的移动性管理、分组域的会话管理。
NAS协议处理UE和CN之间信息的传输。传输的内容可以是用户信息或控制信息，如业务的建立、释放或者移动性管理信息。NAS消息一定程度上独立于AS协议结构，即，与采样什么样的无线接入网无关。
NAS消息的传输要基于底层的AS协议。AS是无线接入网采用的协议。UMTS中的AS协议包括无线接口协议、Iub协议以及Iu协议。其中的无线接口协议是UE与UTRAN间的协议，协议的高层(例如，MAC、RLC、RRC)位于UE和RNC之间。而底层(例如，PHY)位于UE和NodeB之间。
本申请的“核心网设备”可以包括上述接入管理功能实体或会话管理功能实体等任意能够经由一个或多个中间设备(例如，接入设备)的透传与终端设备通信的设备，或者说，本申请的“核心网设备”可以是通过NAS层信令与终端设备通信的设备。
以下，为了便于理解和说明，以AMF作为核心网设备为例，对本申请的处理过程进行详细说明。
下面，对本申请涉及的一些术语进行说明。
1.支持的网络切片
在本申请中，“支持的网络切片”可以理解为小区支持的网络切片或接入设备支持的网络切片。
小区支持的网络切片可以理解为该小区的配置(例如，资源配置等)能够满足该网络切片的要求，或者说，该网络切片对应的业务能够通过该小区进行传输，或者说，该网络切片对应的业务在通过该小区进行传输时的准确性和可靠性能够达到该业务的要求。
类似地，接入设备支持的网络切片可以理解为该接入设备的配置(例如，资源配置等)能够满足该网络切片的要求，或者说，该网络切片对应的业务能够通过该接入设备进行传 输，或者说，该网络切片对应的业务在通过该接入进行传输时的准确性和可靠性能够达到该业务的要求。
在一种可能的实现方式中，该支持的网络切片可以由接入设备通过广播或组播的方式发送给终端设备。
在另一种可能的实现方式中，该支持的网络切片可以由接入设备通过专用信令(或者说，采用单播方式)发送给终端设备。
2.允许的网络切片
“允许的网络切片”可以理解为终端设备在当前处于的网络中被允许使用的网络切片。
例如，当终端设备处于归属网络(或者说，归属地网络)时，该允许的网络切片可以是归属网络分配给终端设备的允许终端设备在该归属网络(例如，归属网络中规定的注册区域)中使用的网络切片，记做，归属网络的允许网络切片。
归属网络的允许网络切片由归属网络的网络设备(例如，核心网设备)下发给终端设备。或者，归属网络的允许网络切片可以在终端设备注册或签约时配置给终端设备。
例如，当终端设备处于拜访网络(或者说，受访网络、受访地网络、拜访地网络)时，该允许的网络切片可以是拜访网络分配给终端设备的允许终端设备在该拜访网络中使用的网络切片，记做，拜访网络的允许网络切片。
在一种可能的事实方式中，该拜访网络的允许网络切片由拜访网络的网络设备(例如，核心网设备)下发给终端设备。
在另一种可能的实施方式中，该拜访网络的允许网络切片和该归属网络的允许网络切片具有映射关系，并且，该映射关系由拜访网络的网络设备(例如，核心网设备)下发给终端设备。
另外，作为示例而非限定，该网络可以包括但不限于PLMN，即，该归属网络可以包括但不限于归属公共陆地移动网(home public land mobile network，HPLMN)。该拜访网络可以包括但不限于受访的公用陆地移动网(visited public land mobile network，VPLMN)。
3.网络切片重映射
网络切片重映射(slice re-mapping)可以是指，已经映射至某一网络切片的业务被重新映射至另一网络切片。例如，“网络切片#1(slice#1)重映射到网络切片#2(slice#2)”可以理解为，slice#1的业务(或者说，被映射至slice#1的业务)可以通过slice#2实现，或者说，通过slice#2的网络资源实现了slice#1的业务。
其中，某一业务“支持切片重映射”可以理解为，已经被映射至某一网络切片的业务允许被重新映射至其他网络切片，或者说，该业务允许(或者说，能够)通过除已被映射至的网络切片以外的网络切片来实现。
某一业务“不支持切片重映射”可以理解为，已经被映射至某一网络切片的业务不允许被重新映射至其他网络切片，即，该业务只允许(或者说，能够)通过已经被映射至的网络切片来实现。
4.网络切片回退
网络切片回退(slice fallback)可以是指，已经映射至某一网络切片的业务被重新映射至预先分配的某一规定的网络切片(为了便于理解，称为原始网络切片)，该原始网络 切片可以是网络预先分配给终端设备的。
其中，某一业务“支持网络切片回退”可以理解为，已经被映射至某一网络切片的业务允许被映射至该初始网络切片，或者说，该业务允许(或者说，能够)通过该初始网络切片来实现。
某一业务“不支持切片回退”可以理解为，已经被映射至某一网络切片的业务不允许被映射至初始网络切片，即，该业务只允许通过已经被映射至的网络切片来实现。
5.小区重定向
为了支持终端设备的移动性，可以提供切换和重定向等技术。
具体地，切换走的是切换流程，包含切换判决：基于覆盖、容量或业务等，然后进行切换准备：源小区和目标小区之间会进行资源申请，数据转发等，切换准备完成后，下发切换命令，UE执行切换。
重定向则没有切换准备的过程，通过无线资源释放(RRC release)消息携带目标小区信息，UE根据目标小区信息重新发起接入。
重定向通常是为不支持切换的UE准备的一种过渡手段。
图3示出了终端设备#A(即，终端设备的一例)在当前接入的接入设备#A(即，第一接入设备的一例)，在当前接入的小区#A(即，第一小区的一例)，需要访问业务#A(即，第一业务的一例)时的处理过程。
在本申请某些实施例中，业务也可以称为应用。
需要说明的是，该接入设备#A可以提供一个小区，即该小区#A。
或者，该接入设备#A也可以提供包括该小区#A在内的多个小区，其中，该多个小区支持的网络切片可以相同也可以不同，本申请并未特别限定。
需要说明的是，该终端设备#A当前可以处于归属网络也可以处于拜访网络，本申请并未特别限定。
如图3所示，在S110，终端设备#A可以接收小区#A支持的网络切片的信息#A(即，第一信息的一例)。
其中，该小区#A支持的网络切片包括至少一个网络切片。
即，该信息#A用于指示该小区#A支持的至少一个网络切片。
例如，该信息#A包括该小区#A支持的至少一个网络切片的信息。
作为而非限定，网络切片的信息也可以称为网络切片的标识，一个网络切片的信息用于指示该网络切片。
作为示例而非限定，网络切片的信息可以包括但不限于单网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)。
此情况下，该信息#A可以包括至少一个支持的网络切片选择辅助信息(Supported NSSAI)。其中，该至少一个Supported NSSAI可以理解为小区#A支持的网络切片的NSSAI。
并且，信息#A指示的网络切片可以是该小区#A支持的全部或部分网络切片，本申请并未特别限定。
作为示例而非限定，该信息#A可以是接入设备#A采用例如广播、组播或单播等方式发送给终端设备#A。
即，该信息#A为经过AS协议层封装的信息，终端设备#A可以在AS层接收该信息#A。
应理解，以上列举的终端设备#A获取信息#A的过程仅为示例性说明，本申请并未限定于此，例如，该信息#A也可以是终端设备#A通过例如D2D传输等方式从其他终端设备获得的。
在S120，终端设备#A可以接收允许的网络切片的信息#B(即，第二信息的一例)。
其中，该终端设备#A的允许的网络切片包括至少一个网络切片。
即，该信息#B用于指示终端设备#A在当前网络(归属网络或受访的网络)的至少一个允许的网络切片。
或者说，该信息#B包括该终端设备#A的至少一个允许的网络切片的信息。
例如，该信息#B可以包括至少一个允许的网络切片选择辅助信息(Allowed NSSAI)。其中，该Allowed NSSAI可以理解为终端设备#A在当前网络中的允许的网络切片的NSSAI。
并且，信息#B指示的网络切片可以是该终端设备#A的允许的网络切片中的全部或部分网络切片，本申请并未特别限定。
作为示例而非限定，该信息#B可以是终端设备#A当前处于的网络的网络设备(例如，核心网设备，记做核心网设备#A)发送给终端设备#A的。
即，该信息#B为经过NAS协议层封装的信息，终端设备#A可以在NAS层接收该信息#B。
其中，该核心网设备#A可以包括MME、AMF或SMF等各种能够通过NAS信令与终端设备进行通信的设备，本申请并未特别限定
并且，终端设备#A可以确定业务#A(或者说，应用#A)对应的网络切片(记做：网络切片#1)的信息。作为示例而非限定，终端设备#A可以在NAS层执行该动作。
其中，该网络切片#1包括该业务#A被映射至的网络切片。
其中，当终端设备#A处于归属网络时，该网络切片#1可以是归属网络的网络切片。
当终端设备#A处于受访的网络时，该网络切片#1可以是网络切片#2对应的网络切片，该网络切片可以是在归属网络中该业务#A对应的网络切片。
并且，该网络切片#1的信息可以包括网络切片#1的S-NSSAI，记做，S-NSSAI#1。
其后，终端设备#A根据网络切片#1、小区#A支持的网络切片和终端设备#A的允许的网络切片对业务#A的会话(记做会话#A)的处理。具体地，针对会话#A的建立请求的处理。
具体地，终端设备#A根据该S-NSSAI#1、该Supported NSSAI和Allowed NSSAI之间的关系进行上述处理。
其中，该判定过程可以在NAS层进行(即，方式A)，也可以在AS层进行(即，方式B)，或者在AS层和NAS层联合进行(即，方式C)，下面，对该过程进行详细说明。
方式A
在S131，终端设备#A的AS层(例如，AS层的逻辑处理单元)可以向NAS层(例如，NAS层的逻辑处理单元)发送该网络切片集合#A的信息(例如，网络切片集合#A中 的各网络切片的信息)，例如，上述Supported NSSAI。
在S132，终端设备#A的NAS层判定该网络切片#1是否属于该小区#A支持的网络切片，例如，该S-NSSAI#1是否属于Supported NSSAI。
终端设备#A的NAS层判定该网络切片#1是否属于该终端设备#A的允许的网络切片，例如，该S-NSSAI#1是否属于Allowed NSSAI。
终端设备#A的NAS层根据上述判定的结果，对会话#A的建立请求的处理。
其中，上述判定结合可以包括：S-NSSAI#1属于Supported NSSAI，且S-NSSAI#1属于Allowed NSSAI(即，判定结果#1)；S-NSSAI#1不属于Supported NSSAI，和/或S-NSSAI#1不属于Allowed NSSAI(即，判定结果#2)。
下面，分别对上述判定结果下处理进行详细说明。
判定结果#1
终端设备#A的NAS层可以生成会话#A的建立请求，并将该会话#A的建立请求发送给终端设备#A的AS层。
终端设备#A的AS层可以将该会话#A的建立请求经由接入设备#A发送给核心网设备#A。其中，该会话#A的建立请求包括该网络切片#1的信息，例如，S-NSSAI#1。
判定结果#2
其中，判定结果#2的情况下，可以包括但不限于以下处理方式
方式2a
如果未生成会话#A的建立请求，则终端设备#A的NAS层不生成(例如，禁止生成)会话#A的建立请求。
如果已经生成会话#A的建立请求，则终端设备#A的NAS层停止(例如，禁止)向终端设备#A的AS层发送会话#A的建立请求。
方式2b
在S133，终端设备#A的NAS层可以生成会话#A的建立请求，该会话#A的建立请求包括该网络切片#1的信息，例如，S-NSSAI#1，并且，该会话#A的建立请求包括信息#C(即，第三信息的一例)。
其中，该信息#C可以包括但不限于以下至少一种信息：
信息#C1
具体地，该信息#C1用于指示该业务#A是否支持网络切片重映射，即，该信息#C1用于指示该业务#A支持网络切片重映射，或者该信息#C1指示该业务#A不支持网络切片重映射。
例如，在本申请中，网络设备(例如，核心网设备)可以预先向终端设备下发多种业务中的一种或多种业务是否支持网络切片重映射的信息，从而，终端设备可以基于该信息，确定某一业务是否支持网络切片重映射。
再例如，在本申请中，网络设备(例如，核心网设备)可以预先向终端设备下发一种或多种业务参数组(其中，每个业务参数组可以包括至少一个业务参数)与是否支持网络切片重映射的情况的关系，从而，终端设备可以根据该关系，某一业务的业务参数所属于的业务参数组对应的情况，确定该业务是否支持网络切片重映射的情况。
作为示例而非限定，该业务参数可以包括但不限于，业务的紧急程度，业务的优先级， 业务的类型(例如，实时通信或下载等类型)等。
此情况下，核心网设备#A能够从会话#A的建立请求中获取该信息#C1。
并且，核心网设备#A可以通过以下一种或多种方式，得到上述判定结果#2。
方式x
例如，当核心网设备#A检测信息#C时，可以确定终端设备#A当前接入的小区或接入设备不支持该网络切片#1，或者，终端设备#A的允许的网络切片不包括该网络切片#1，进而得到上述判定结果#2。
方式y
再例如，该会话#A的建立请求还可以承载信息#D，该信息#D可以用于指示终端设备#A当前接入的小区或接入设备不支持该网络切片#1，或者，终端设备#A的允许的网络切片不包括该网络切片#1，进而得到上述判定结果#2。
方式z
再例如，核心网设备#A可以确定该小区#A支持的网络切片的信息，例如，Supported NSSAI；以及，核心网设备#A可以确定终端设备#A的允许的网络切片的信息，例如，Allowed NSSAI；从而，核心网设备#A可以根据上述信息得到判定结果#2。
其后，核心网设备#A可以根据该信息#C1，对业务#A进行网络切片重映射，即处理方式1。
例如，核心网设备#A可以将该业务#A重新映射至网络切片#2，该网络切片#2属于上述小区#A支持的网络切片，并且，该网络切片#2属于上述终端设备#A的允许的网络切片，即，网络切片#2的信息(记做，S-NSSAI#2)属于Supported NSSAI，且S-NSSAI#2属于Allowed NSSAI。
从而，终端设备#A能够使用网络切片#2在小区#A完成对业务#A的访问，或者说，使用网络切片#2建立业务#A的会话连接。
信息#C2
具体地，该信息#C2用于指示该业务#A是否支持网络切片回退，即，该信息#C2用于指示该业务#A支持网络切片回退，或者该信息#C1指示该业务#A不支持网络切片回退。
例如，在本申请中，网络设备(例如，核心网设备)可以预先向终端设备下发多种业务中的每种业务是否支持网络切片回退的信息，从而，终端设备可以基于该信息，确定某一业务是否支持网络切片回退。
再例如，在本申请中，网络设备(例如，核心网设备)可以预先向终端设备下发多种业务参数组(其中，每个业务参数组可以包括至少一个业务参数)与是否支持网络切片回退的情况的关系，从而，终端设备可以将根据关系，将某一业务的业务参数所属于的业务参数组对应的情况，确定为该业务是否支持网络切片回退的情况。
作为示例而非限定，该业务参数可以包括但不限于，业务的紧急程度，业务的优先级，业务的类型(例如，实时通信或下载等类型)等。
此情况下，核心网设备#A能够从会话#A的建立请求中获取该信息#C2。
并且，核心网设备#A可以通过上述方式x～z中的一种或多种方式，得到上述判定结果#2。
其后，核心网设备#A可以根据该信息#C2，对业务#A进行网络切片回退，即处理方 式2。
例如，核心网设备#A可以将该业务#A映射至网络切片#3(即，初始网络切片的一例)。
其中，该网络切片#3可以是网络设备(例如，核心网设备)预先分配给终端设备#A的用于网络切片回退处理的网络切片。
另外，该网络切片#3可能属于上述小区#A支持的网络切片，也可能不属于该小区#A支持的网络切片。并且，该网络切片#3可能属于上述终端设备#A的允许的网络切片，也可能不属于该终端设备#A的允许的网络切片。本申请并未特别限定。
信息#C3
具体地，该信息#C3用于指示该终端设备#A是否支持小区重定向，即，该信息#C3用于指示该终端设备#A支持小区重定向，或者该信息#C3指示终端设备#A不支持小区重定向。
例如，在本申请中，终端设备可以根据其自身的能力，确定是否支持小区重定向。
此情况下，核心网设备#A能够从会话#A的建立请求中获取该信息#C3。
并且，核心网设备#A可以通过上述方式x～z中的一种或多种方式，得到上述判定结果#2。
其后，核心网设备#A可以根据该信息#C3，对终端设备#A进行小区重定向，即处理方式3。
例如，核心网设备#A可以将该终端设备#A重定向至小区#B(即，第二小区的一例)。
其中，该网络切片#1可能属于小区#B支持的网络切片。
从而，终端设备#A能够使用网络切片#1在小区#B完成对业务#A的访问，或者说，通过小区#B建立业务#A的会话连接。
信息#C4
具体地，该信息#C4用于指示网络切片#4(即，第二网络切片的一例).
其中，该网络切片#4可以是终端设备#A根据上述信息#A和信息#B确定的，即，该网络切片#4属于上述小区#A支持的网络切片，并且，该网络切片#4属于上述终端设备#A的允许的网络切片，即，网络切片#4的信息(记做，S-NSSAI#4)属于Supported NSSAI，且S-NSSAI#4属于Allowed NSSAI。
此情况下，核心网设备#A能够从会话#A的建立请求中获取该信息#C4。
并且，核心网设备#A可以通过上述方式x～z中的一种或多种方式，得到上述判定结果#2。
其后，核心网设备#A可以根据该信息#C4，将该业务#A重新映射至网络切片#4，即处理方式4。
从而，终端设备#A能够使用网络切片#4在小区#A完成对业务#A的访问，或者说，使用网络切片#4建立业务#A的会话连接。
信息#C5
具体地，该信息#C5用于指示小区#B(即，第二小区的一例)，其中，该小区#B是支持该网络切片#1的小区。
例如，该小区#B可以广播该小区#B支持的网络切片的信息，从而，终端设备#A可以根据该小区#B(具体地，是小区#B的网络设备)广播的信息，确定该小区#B支持该网 络切片#1。
或者，终端设备#A也可以从其他设备(例如，其他终端设备)获得该小区#B支持的网络切片的信息，本申请并未特别限定。
此情况下，核心网设备#A能够从会话#A的建立请求中获取该信息#C5。
并且，核心网设备#A可以通过上述方式x～z中的一种或多种方式，得到上述判定结果#2。
其后，核心网设备#A可以根据该信息#C5，对终端设备#A进行小区重定向，以使终端设备#A通过小区#B进行通信，即处理方式5。
从而，终端设备#A能够使用网络切片#1在小区#B完成对业务#A的访问，或者说，使用在小区#B建立业务#A的会话连接。
在一种可能的实现方式中，在信息#C包括上述C1～C5中的两种或两种以上的方式时，核心网设备根据信息#C进行的处理可以包括上述处理方式1～5中的两种或两种以上处理方式。
此情况下，可以通过管理员设置或通信协议规定的方式为上述处理方式1～5设置优先级，并根据信息#C实际包括的具体信息的情况，从可选地处理方式中，选择优先级较高(例如，最高)的处理方式对终端设备#A进行控制。
另外处理方式1～5的优先级可以根据需要任意设置，本申请并未特别限定。
方式B
在S134，终端设备#A的NAS层(例如，NAS层的逻辑处理单元)可以判定网络切片#1是否属于终端设备#A的允许的网络切片，例如，S-NSSAI#1是否属于Allowed NSSAI。
如果判定结果为：判定网络切片#1属于终端设备#A的允许的网络切片，则终端设备#A的NAS层向AS层(例如，AS层的逻辑处理单元)发送业务#A的会话建立请求，该会话#A的建立请求包括该网络切片#1的信息，例如，S-NSSAI#1。
需要说明的是，该会话#A的建立请求也可以不包括该网络切片#1的信息，即，终端设备#A的NAS层可以通过将网络切片#1的信息与该会话#A的建立请求彼此独立地发送给AS层。
在S135，终端设备#A的AS层可以判定该网络切片#1是否属于该小区#A支持的网络切片，例如，该S-NSSAI#1是否属于Supported NSSAI。
如果判定结果为：该网络切片#1属于该小区#A支持的网络切片，则AS层可以将该会话#A的建立请求经由接入设备#A发送给核心网设备#A。
如果判定结果为：该网络切片#1不属于该小区#A支持的网络切片，则AS层向NAS层发送反馈信息并停止向接入设备#A发送该会话#A的建立请求，所述反馈信息用于指示该网络切片#1不属于该小区#A支持的网络切片。
在S136，终端设备#A的NAS层可以根据反馈信息，对会话#A的建立请求进行处理。
例如，终端设备#A的NAS层不生成(例如，禁止生成)会话#A的建立请求。
再例如，终端设备#A的NAS层可以生成会话#A的建立请求，该会话#A的建立请求包括该网络切片#1的信息，例如，S-NSSAI#1，并且，该会话#A的建立请求包括信息#C(即，第三信息的一例)。
其中，该信息#C包括的信息以及核心网设备根据该信息#C的处理可以与上述方式A 中描述的过程相似，这里，为了避免赘述，省略其详细说明。
方式C
在S137，终端设备#A的NAS层向AS层(例如，AS层的逻辑处理单元)发送业务#A的会话建立请求，该会话#A的建立请求包括该网络切片#1的信息，例如，S-NSSAI#1。
需要说明的是，该会话#A的建立请求也可以不包括该网络切片#1的信息，即，终端设备#A的NAS层可以通过将网络切片#1的信息与该会话#A的建立请求彼此独立地发送给AS层。
并且，终端设备#A的NAS层向AS层发送终端设备#A的允许的网络切片的信息，例如，Allowed NSSAI。
在S138，终端设备#A的AS层判定该网络切片#1是否属于该小区#A支持的网络切片，例如，该S-NSSAI#1是否属于Supported NSSAI。
终端设备#A的AS层判定该网络切片#1是否属于该终端设备#A的允许的网络切片，例如，该S-NSSAI#1是否属于Allowed NSSAI。
如果判定结果为：该网络切片#1属于该小区#A支持的网络切片，并且，网络切片#1属于该终端设备#A的允许的网络切片，则AS层可以该会话#A的建立请求经由接入设备#A发送给核心网设备#A。
如果判定结果为：该网络切片#1不属于该小区#A支持的网络切片，和/或该网络切片#1不属于该终端设备#A的允许的网络切片，则AS层向NAS层发送反馈信息并停止向接入设备#A发送该会话#A的建立请求，所述反馈信息用于指示该网络切片#1不属于该小区#A支持的网络切片和/或网络切片#2不属于该小区#A支持的网络切片。
在S139，终端设备#A的NAS层可以根据反馈信息，对会话#A的建立请求进行处理。
例如，终端设备#A的NAS层不生成(例如，禁止生成)会话#A的建立请求。
再例如，终端设备#A的NAS层可以生成会话#A的建立请求，该会话#A的建立请求包括该网络切片#1的信息，例如，S-NSSAI#1，并且，该会话#A的建立请求包括信息#C(即，第三信息的一例)。
其中，该信息#C包括的信息以及核心网设备根据该信息#C的处理可以与上述方式A中描述的过程相似，这里，为了避免赘述，省略其详细说明。
图4示出了核心网设备#1在接收到来自终端设备#1的会话建立请求时的处理过程，为了便于理解和说明，将终端设备#1当前接入的接入设备记做接入设备#1(即，第一接入设备的一例)，将终端设备#1当前接入的小区记做小区#1(即，第一小区的一例)，将终端设备当前需要访问业务记做业务#1(即，第一业务的一例)。将该业务#1对应的网络切片(即，第一网络切片的一例)记做网络切片#A
需要说明的是，该接入设备#1可以提供一个小区，即该小区#1。
或者，该接入设备#1也可以提供包括该小区#1在内的多个小区，其中，该多个小区支持的网络切片可以相同也可以不同，本申请并未特别限定。
需要说明的是，该终端设备#1当前可以处于归属网络也可以处于拜访网络，本申请并未特别限定。
如图4所示，在S210，终端设备#1向核心网设备#1发送业务#1的会话建立请求，该会话建立请求中携带业务#1对应的网络切片#A)的信息，例如网络切片#A的S-NSSAI， 记做S-NSSAI#A。
并且，核心网设备#1获取信息#1(即，指示信息的一例)。
其中，该信息#1可以包括但不限于以下至少一种信息：
信息#1A
具体地，该信息#1A用于指示该业务#1是否支持网络切片重映射，即，该信息#1A用于指示该业务#1支持网络切片重映射，或者该信息#1A指示该业务#1不支持网络切片重映射。
信息#1B
具体地，该信息#1B用于指示该业务#1是否支持网络切片回退，即，该信息#1B用于指示该业务#1支持网络切片回退，或者该信息#1B指示该业务#1不支持网络切片回退。
信息#1C
具体地，该信息#1C用于指示该终端设备#1是否支持小区重定向，即，该信息#1C用于指示该终端设备#1支持小区重定向，或者该信息#1C指示终端设备#1不支持小区重定向。
信息#1D
具体地，该信息#1D用于指示网络切片#B(即，第二网络切片的一例)。
其中，该网络切片#B属于上述网络切片集合#1，并且，该网络切片#B属于上述网络切片集合#2。
信息#1E
具体地，该信息#1E用于指示小区#2(即，第二小区的一例)，其中，该小区#2是支持该网络切片#A的小区。
在一种实现方式中，在S221，终端设备#1可以向核心网设备#1发送该信息#1，例如，该信息#1可以承载于业务#1的会话建立请求。
并且，此情况下，终端设备#1确定方法和过程可以与图3所示方法中信息#C的确定方法和过程相似，这里，为了避免赘述，省略其详细说明。
与图3所示过程不同的是，在图4所示过程中，终端设备#1也可以不判定该网络切片#A、小区#1支持的网络切片和终端设备#1的允许的网络切片之间的关系。
即，在图4所示过程中，终端设备#1判定该网络切片#A、小区#1支持的网络切片和终端设备#1的允许的网络切片之间的关系的过程是可选地。
再另一种实现方式中，在S222，其他网络设备，例如UDM向核心网设备#1发送该信息#1。例如，核心网设备#1可以向UDM发送查询请求，该查询请求用于请求发送该信息#1。例如，该查询请求中可以包括该终端设备#1的信息和该网络切片#A的信息等。
可选地，在S230，核心网设备还可以判定该网络切片#A是否属于小区#1支持的网络切片。并且，在判定结果为该网络切片#1不属于小区#1支持的网络切片时，执行S221或S222。或者，在判定结果为该网络切片#1不属于小区#1支持的网络切片时执行S240。
在S240，核心网设备#1可以根据该信息#1，控制终端设备#1。
其中，核心网设备#1可以根据该信息#1控制终端设备#1的过程可以与上述核心网设备#A根据信息#C控制终端设备#A的过程相似。
例如，核心网设备#1可以根据该信息#1A，对业务#A进行网络切片重映射。即，核 心网设备#1可以将该业务#1重新映射至网络切片#C，该网络切片#C属于上述网络切片集合#1，并且，该网络切片#C属于上述网络切片集合#2。
再例如，核心网设备#1可以根据该信息#1B，对业务#A进行网络切片回退。即，核心网设备#1可以将该业务#1映射至网络切片#D(即，初始网络切片的一例)。其中，该网络切片#D可以是网络设备(例如，核心网设备)预先分配给终端设备#1的用于网络切片回退处理的网络切片。另外，该网络切片#D可能属于上述网络切片集合#1，也可能不属于该网络切片集合#1。并且，该网络切片#D可能属于上述网络切片集合#2，也可能不属于该网络切片集合#2。本申请并未特别限定。
再例如，核心网设备#A可以根据该信息#1C，对终端设备#A进行小区重定向。例如，核心网设备#A可以将该终端设备#A重定向至小区#3(即，第二小区的一例)。其中，该网络切片#A属于小区#3支持的网络切片。
再例如，核心网设备#1可以根据该信息#1D，将该业务#1重新映射至网络切片#B。
再例如，核心网设备#1可以根据该信息#1E，对终端设备#1进行小区重定向，以使终端设备#1通过小区#2进行通信。
根据前述方法，图5为本申请实施例提供的通信装置300的示意图。
其中，该装置300可以为终端设备，也可以为芯片或电路，比如可设置于终端设备的芯片或电路。
该装置300可以包括处理单元310(，可选地，还可以包括存储单元320。该存储单元320用于存储指令。
一种可能的方式中，该处理单元310用于执行该存储单元320存储的指令，以使装置300实现如上述方法中终端设备(例如，终端设备#A或终端设备#1)，执行的步骤。
进一步的，该装置300还可以包括输入口330(即，通信单元的一例)和输出口330(即，收发单元的另一例)。进一步的，该处理单元310、存储单元320、输入口330和输出口330可以通过内部连接通路互相通信，传递控制和/或数据信号。该存储单元320用于存储计算机程序，该处理单元310可以用于从该存储单元320中调用并运行该计算计程序，完成上述方法中终端设备的步骤。该存储单元320可以集成在处理单元310中，也可以与处理单元310分开设置。
可选地，一种可能的方式中，该输入口330可以为接收器，该输出口340为发送器。其中，接收器和发送器可以为相同或者不同的物理实体。为相同的物理实体时，可以统称为收发器。
可选地，一种可能的方式中，该输入口330为输入接口，该输出口340为输出接口。
作为一种实现方式，输入口330和输出口340的功能可以考虑通过收发电路或者收发的专用芯片实现。处理单元310可以考虑通过专用处理芯片、处理电路、处理单元或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本申请实施例提供的终端设备。即将实现处理单元310、输入口330和输出口340功能的程序代码存储在存储单元320中，通用处理单元通过执行存储单元320中的代码来实现处理单元310、输入口330和输出口340的功能。
当该装置300为终端设备时，该终端设备包括处理器、存储器、射频电路、天线以及 输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对终端设备进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端设备可以不具有输入输出装置。当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。此情况下，可以将具有处理功能的处理器视为终端设备的处理单元310。处理单元310也可以称为处理器，处理单板，处理模块、处理装置等。并且，此情况下，可以将接收机、接收器、或接收电路等视为输入口330。可以将发射机、发射器或者发射电路等视为输出口340。
当该通信装置300为芯片时，该芯片包括收发电路和处理电路。其中，收发电路可以是输入/输出电路或通信接口；处理电路可以为该芯片上集成的处理器或者微处理器或者集成电路。输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的，输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是不同的电路，也可以是同一电路，这种情况下该电路在不同的时刻分别用作输入电路和输出电路。
在一种实现方式中，输入口330用于接收第一信息，所述第一信息用于指示至少一个支持的网络切片，所述至少一个支持的网络切片包括第一小区支持的网络切片和/或第一接入设备支持的网络切片，所述第一小区包括终端设备当前接入的小区，所述第一接入设备包括终端设备当前接入的接入设备，并用于接收第二信息，所述第二信息用于指示至少一个允许的网络切片；
所述处理单元310用于根据所述第一信息和所述第二信息，处理第一业务的会话建立请求。
可选地，所述处理单元310具体用于：
如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则控制输出口340发送第一业务的会话建立请求，其中，所述第一网络切片包括所述第一业务对应的网络切片；
如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则控制输出口340停止第一业务的会话建立请求；
如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则控制输出口340发送第三信息，所述第三信息用于指示以下至少一项：所述第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，其中，所述第二小区支持所述 第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片。
可选地，所述处理单元310用于在AS层向NAS层发送至少一个支持的网络切片的信息，用于在NAS层判定第一网络切片是否属于所述至少一个支持的网络切片，其中，所述第一网络切片包括所述第一业务对应的网络切片，并在NAS层判定第一网络切片是否属于所述至少一个允许的网络切片。
可选地，所述处理单元310用于在NAS层向AS层发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片；
当所述第一网络切片属于所述至少一个允许的网络切片时，所述处理单元310用于在NAS层向AS层发送所述第一业务的会话建立请求；
当第一网络切片属于所述至少一个支持的网络切片时，所述处理单元310在AS层控制输出口340发送所述第一业务的会话建立请求；
当第一网络切片不属于所述至少一个支持的网络切片时，所述处理单元310在AS层向NAS层发送反馈信息，所述反馈信息用于指示第一网络切片不属于所述至少一个支持的网络切片。
可选地，所述处理单元310用于NAS层向AS层发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片，并在NAS层向所述终端设备的AS层发送至少一个允许的网络切片的信息，并在NAS层向所述终端设备的AS层发送所述第一业务的会话建立请求；
如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则可选地，所述处理单元310在AS层控制输出口340发送所述第一业务的会话建立请求；
如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，在所述处理单元310在AS层向所述终端设备的NAS层发送反馈信息，所述反馈信息用于指示第一网络切片不属于所述至少一个支持的网络切片。
其中，以上列举的装置300中各模块或单元的功能和动作仅为示例性说明，当该装置300配置在或本身即为终端设备时，装置300中各模块或单元可以用于执行上述方法中终端设备(例如，终端设备#1或终端设备#A)所执行的各动作或处理过程。这里，为了避免赘述，省略其详细说明。
该装置300所涉及的与本申请实施例提供的技术方案相关的概念，解释和详细说明及其他步骤请参见前述方法或其他实施例中关于这些内容的描述，此处不做赘述。
根据前述方法，图6为本申请实施例提供的通信装置400的示意图。
其中，该装置400可以为核心网设备，也可以为芯片或电路，比如可设置于核心网设备的芯片或电路。
该装置400可以包括处理单元410(即，处理单元的一例)，可选地，还可以包括存储单元420。该存储单元420用于存储指令。
一种可能的方式中，该处理单元410用于执行该存储单元420存储的指令，以使装置400实现如上述方法中网络设备，执行的步骤。
进一步的，该装置400还可以包括输入口430(即，通信单元的一例)和输出口440(即，收发单元的另一例)。进一步的，该处理单元410、存储单元420、输入口430和输出口440可以通过内部连接通路互相通信，传递控制和/或数据信号。该存储单元420用于存储计算机程序，该处理单元410可以用于从该存储单元420中调用并运行该计算计程序，完成上述方法中网络设备的步骤。该存储单元420可以集成在处理单元410中，也可以与处理单元410分开设置。
可选地，一种可能的方式中，该输入口430可以为接收器，该输出口440为发送器。其中，接收器和发送器可以为相同或者不同的物理实体。为相同的物理实体时，可以统称为收发器。
可选地，一种可能的方式中，该输入口430为输入接口，该输出口440为输出接口。
作为一种实现方式，输入口430和输出口440的功能可以考虑通过收发电路或者收发的专用芯片实现。处理单元410可以考虑通过专用处理芯片、处理电路、处理单元或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本申请实施例提供的网络设备。即将实现处理单元410、输入口430和输出口440功能的程序代码存储在存储单元420中，通用处理单元通过执行存储单元420中的代码来实现处理单元410、输入口430和输出口440的功能。
当该装置400为核心网设备时，该核心网设备包括处理器、存储器以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对终端设备进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。输入输出装置用于从其他设备(例如，接入网设备或其他核心网设备)接收数据，和/或向其他设备发送数据。此情况下，可以将具有处理功能的处理器视为终端设备的处理单元410。处理单元410也可以称为处理器，处理单板，处理模块、处理装置等。并且，此情况下，可以将接收机、接收器、或接收电路等视为输入口430。可以将发射机、发射器或者发射电路等视为输出口440。
当该通信装置400为芯片时，该芯片包括收发电路和处理电路。其中，收发电路可以是输入/输出电路或通信接口；处理电路可以为该芯片上集成的处理器或者微处理器或者集成电路。输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的，输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是不同的电路，也可以是同一电路，这种情况下该电路在不同的时刻分别用作输入电路和输出电路。
在一种实现方式中，所述输入口430用于获取指示信息，所述指示信息用于指示以下至少一项：
终端设备对应的第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，
其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片；
所述处理单元410用于根据所述指示信息与所述终端设备通信。
可选地，所述输入口430用于从所述终端设备接收所述指示信息。
可选地，所述处理单元410用于根据所述指示信息，从多种处理方式中确定符合所述指示信息指示的情况的第一处理方式；
所述核心网设备根据所述第一处理方式与所述终端设备通信。
可选地，所述多种处理方式包括以下至少两种处理方式：
对所述第一业务进行网络切片重映射；
将所述第一业务重映射至所述第二网络切片；
对所述第一业务进行网络切片回退；
对所述终端设备进行小区重定向；
将所述终端设备重定向至所述第二小区；
将所述终端设备重定向至所述第二接入设备的小区。
可选地，所述处理单元410用于根据所述指示信息和所述多种处理方式中每种处理方式的优先级，确定所述第一处理方式。
可选地，所述指示信息承载于所述第一业务的会话建立请求。
其中，以上列举的装置400中各模块或单元的功能和动作仅为示例性说明，当该装置400配置在或本身即为核心网设备时，装置400中各模块或单元可以用于执行上述方法中核心网设备(例如，核心网设备#1或核心网设备#A)所执行的各动作或处理过程。这里，为了避免赘述，省略其详细说明。
该装置400所涉及的与本申请实施例提供的技术方案相关的概念，解释和详细说明及其他步骤请参见前述方法或其他实施例中关于这些内容的描述，此处不做赘述。
根据前述方法，图7为本申请实施例提供的通信装置500的示意图。
其中，该装置500可以为终端设备，也可以为芯片或电路，比如可设置于终端设备的芯片或电路。
该装置500可以包括处理单元510(即，处理单元的一例)，可选地，还可以包括存储单元520。该存储单元520用于存储指令。
一种可能的方式中，该处理单元510用于执行该存储单元520存储的指令，以使装置300实现如上述方法中终端设备(例如，终端设备#1)，执行的步骤。
进一步的，该装置500还可以包括输入口530(即，通信单元的一例)和输出口530(即，收发单元的另一例)。进一步的，该处理单元510、存储单元520、输入口530和输出口530可以通过内部连接通路互相通信，传递控制和/或数据信号。该存储单元520用于存储计算机程序，该处理单元510可以用于从该存储单元520中调用并运行该计算计程序，完成上述方法中终端设备的步骤。该存储单元520可以集成在处理单元510中，也可以与处理单元510分开设置。
可选地，一种可能的方式中，该输入口530可以为接收器，该输出口540为发送器。其中，接收器和发送器可以为相同或者不同的物理实体。为相同的物理实体时，可以统称为收发器。
可选地，一种可能的方式中，该输入口530为输入接口，该输出口540为输出接口。
作为一种实现方式，输入口530和输出口540的功能可以考虑通过收发电路或者收发 的专用芯片实现。处理单元510可以考虑通过专用处理芯片、处理电路、处理单元或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本申请实施例提供的终端设备。即将实现处理单元510、输入口530和输出口540功能的程序代码存储在存储单元520中，通用处理单元通过执行存储单元520中的代码来实现处理单元510、输入口530和输出口540的功能。
当该装置500为终端设备时，该终端设备包括处理器、存储器、射频电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对终端设备进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端设备可以不具有输入输出装置。当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。此情况下，可以将具有处理功能的处理器视为终端设备的处理单元510。处理单元510也可以称为处理器，处理单板，处理模块、处理装置等。并且，此情况下，可以将接收机、接收器、或接收电路等视为输入口530。可以将发射机、发射器或者发射电路等视为输出口540。
当该通信装置500为芯片时，该芯片包括收发电路和处理电路。其中，收发电路可以是输入/输出电路或通信接口；处理电路可以为该芯片上集成的处理器或者微处理器或者集成电路。输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的，输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是不同的电路，也可以是同一电路，这种情况下该电路在不同的时刻分别用作输入电路和输出电路。
在一种实现方式中，处理单元510用于生成指示信息，所述指示信息用于指示以下至少一项：
所述终端设备对应的第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，
其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片；
输出口540用于发送所述指示信息。
可选地，所述指示信息承载于所述第一业务的会话建立请求。
其中，以上列举的装置500中各模块或单元的功能和动作仅为示例性说明，当该装置500配置在或本身即为终端设备时，装置500中各模块或单元可以用于执行上述方法中终 端设备(例如，终端设备#1)所执行的各动作或处理过程。这里，为了避免赘述，省略其详细说明。
该装置500所涉及的与本申请实施例提供的技术方案相关的概念，解释和详细说明及其他步骤请参见前述方法或其他实施例中关于这些内容的描述，此处不做赘述。
图8为本申请提供的一种终端设备600的结构示意图。上述装置300或500可以配置在该终端设备600中，或者，上述装置300或500本身可以即为该终端设备600。或者说，该终端设备600可以执行上述方法中终端设备(例如，终端设备#1或终端设备#A)执行的动作。
为了便于说明，图8仅示出了终端设备的主要部件。如图8所示，终端设备600包括处理器、存储器、控制电路、天线以及输入输出装置。
处理器主要用于对通信协议以及通信数据进行处理，以及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，例如用于支持终端设备执行上述传输预编码矩阵的指示方法实施例中所描述的动作。存储器主要用于存储软件程序和数据，例如存储上述实施例中所描述的码本。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做收发器，主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端设备开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图8仅示出了一个存储器和处理器。在实际的终端设备中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
例如，处理器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8中的处理器集成了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。所述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。所述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单元中，由处理器执行软件程序以实现基带处理功能。
示例性的，在本申请实施例中，可以将具有收发功能的天线和控制电路视为终端设备600的收发单元610，将具有处理功能的处理器视为终端设备600的处理单元620。如图8所示，终端设备600包括收发单元610和处理单元620。收发单元也可以称为收发器、收 发机、收发装置等。可选地，可以将收发单元610中用于实现接收功能的器件视为接收单元，将收发单元610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。示例性的，接收单元也可以称为接收机、接收器、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。
根据本申请实施例提供的方法，本申请实施例还提供一种通信系统，其包括一个或多个前述的终端设备和网络设备。
应理解，本申请实施例中，该处理器可以为中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的随机存取存储器(random access memory，RAM)可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
上述实施例，可以全部或部分地通过软件、硬件、固件或其他任意组合来实现。当使用软件实现时，上述实施例可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令或计算机程序。在计算机上加载或执行所述计算机指令或计算机程序时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以为通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集合的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质。半导体介质可以是固态硬盘。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。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。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。所述功能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对现有技术做出贡献的部分或者该技术方案的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、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请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，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (27)

  1. 一种通信方法，其特征在于，包括：
    终端设备接收第一信息，所述第一信息用于指示至少一个支持的网络切片，所述至少一个支持的网络切片包括第一小区支持的网络切片和/或第一接入设备支持的网络切片，所述第一小区包括所述终端设备当前接入的小区，所述第一接入设备包括所述终端设备当前接入的接入设备；
    所述终端设备接收第二信息，所述第二信息用于指示至少一个允许的网络切片；
    所述终端设备根据所述第一信息和所述第二信息，处理第一业务的会话建立请求。
  2. 根据权利要求1所述的方法，其特征在于，其特征在于，所述终端设备根据所述第一信息和所述第二信息，处理第一业务的会话建立请求，包括以下至少一项：
    如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则发送第一业务的会话建立请求，其中，所述第一网络切片包括所述第一业务对应的网络切片；
    如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则停止第一业务的会话建立请求；或
    如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则发送第三信息，所述第三信息用于指示以下至少一项：所述第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片。
  3. 根据权利要求1或2所述的方法，其特征在于，终端设备接收第一信息包括：
    所述终端设备的接入AS层接收所述第一信息；
    所述终端设备接收第二信息，包括：
    所述终端设备的非接入NAS层接收所述第二信息。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述终端设备的AS层向所述终端设备的NAS层发送至少一个支持的网络切片的信息；
    所述终端设备的NAS层判定第一网络切片是否属于所述至少一个支持的网络切片，其中，所述第一网络切片包括所述第一业务对应的网络切片；
    所述终端设备的NAS层判定第一网络切片是否属于所述至少一个允许的网络切片。
  5. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述终端设备的NAS层向所述终端设备的AS层发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片；
    当所述第一网络切片属于所述至少一个允许的网络切片时，所述终端设备的NAS层向所述终端设备的AS层发送所述第一业务的会话建立请求；
    当第一网络切片属于所述至少一个支持的网络切片时，所述终端设备的AS层发送所 述第一业务的会话建立请求；
    当第一网络切片不属于所述至少一个支持的网络切片时，所述终端设备的AS层向所述终端设备的NAS层发送反馈信息，所述反馈信息用于指示第一网络切片不属于所述至少一个支持的网络切片。
  6. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述终端设备的NAS层向所述终端设备的AS层发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片；
    所述终端设备的NAS层向所述终端设备的AS层发送至少一个允许的网络切片的信息；
    所述终端设备的NAS层向所述终端设备的AS层发送所述第一业务的会话建立请求；
    如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则所述终端设备的AS层发送所述第一业务的会话建立请求；
    如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，所述终端设备的AS层向所述终端设备的NAS层发送反馈信息，所述反馈信息用于指示第一网络切片不属于所述至少一个支持的网络切片。
  7. 一种通信方法，其特征在于，包括：
    核心网设备获取指示信息，所述指示信息用于指示以下至少一项：
    终端设备对应的第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，
    其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片；
    所述核心网设备根据所述指示信息与所述终端设备通信。
  8. 根据权利要求7所述的方法，其特征在于，核心网设备获取指示信息，包括：
    所述核心网设备从所述终端设备接收所述指示信息。
  9. 根据权利要求7或8所述的方法，其特征在于，所述核心网设备根据所述指示信息与所述终端设备通信，包括：
    所述核心网设备根据所述指示信息，从多种处理方式中确定符合所述指示信息指示的情况的第一处理方式；
    所述核心网设备根据所述第一处理方式与所述终端设备通信。
  10. 根据权利要求9所述的方法，其特征在于，所述多种处理方式包括以下至少两种处理方式：
    对所述第一业务进行网络切片重映射；
    将所述第一业务重映射至所述第二网络切片；
    对所述第一业务进行网络切片回退；
    对所述终端设备进行小区重定向；
    将所述终端设备重定向至所述第二小区；
    将所述终端设备重定向至所述第二接入设备的小区。
  11. 根据权利要求9或10所述的方法，其特征在于，所述核心网设备根据所述指示 信息，从多种处理方式中确定符合所述指示信息指示的情况的第一处理方式，包括：
    所述核心网设备根据所述指示信息和所述多种处理方式中每种处理方式的优先级，确定所述第一处理方式。
  12. 根据权利要求7至11中任一项所述的方法，其特征在于，所述指示信息承载于所述第一业务的会话建立请求。
  13. 一种通信装置，其特征在于，包括：
    收发单元，用于接收第一信息，所述第一信息用于指示至少一个支持的网络切片，所述至少一个支持的网络切片包括第一小区支持的网络切片和/或第一接入设备支持的网络切片，所述第一小区包括所述终端设备当前接入的小区，所述第一接入设备包括所述终端设备当前接入的接入设备，并接收第二信息，所述第二信息用于指示至少一个允许的网络切片；
    处理单元，用于根据所述第一信息和所述第二信息，处理第一业务的会话建立请求。
  14. 根据权利要求13所述的装置，其特征在于，其特征在于，所述处理单元具体用于执行以下至少一项：
    如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则控制所述收发单元发送第一业务的会话建立请求，其中，所述第一网络切片包括所述第一业务对应的网络切片；
    如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则控制所述收发单元停止第一业务的会话建立请求；或
    如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则控制所述收发单元发送第三信息，所述第三信息用于指示以下至少一项：所述第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片。
  15. 根据权利要求13或14所述的装置，其特征在于，所述收发单元通过接入AS层接收所述第一信息，并通过非接入NAS层接收所述第二信息。
  16. 根据权利要求15所述的装置，其特征在于，所述装置还包括：
    所述处理单元具体用于在AS层向NAS层发送至少一个支持的网络切片的信息，并NAS层判定第一网络切片是否属于所述至少一个支持的网络切片，其中，所述第一网络切片包括所述第一业务对应的网络切片，并在NAS层判定第一网络切片是否属于所述至少一个允许的网络切片。
  17. 根据权利要求15所述的装置，其特征在于，所述处理单元具体用于在NAS层向AS层发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片，
    当所述第一网络切片属于所述至少一个允许的网络切片时，在NAS层向AS层发送所述第一业务的会话建立请求；
    当第一网络切片属于所述至少一个支持的网络切片时，控制所述收发单元通过AS层 发送所述第一业务的会话建立请求；
    当第一网络切片不属于所述至少一个支持的网络切片时，在AS层向NAS层发送反馈信息，所述反馈信息用于指示第一网络切片不属于所述至少一个支持的网络切片。
  18. 根据权利要求15所述的装置，其特征在于，所述处理单元具体用于在NAS层向AS层发送所述第一网络切片的信息，所述第一网络切片包括所述第一业务对应的网络切片，在NAS层向所述终端设备的AS层发送至少一个允许的网络切片的信息，在NAS层向所述终端设备的AS层发送所述第一业务的会话建立请求，
    如果第一网络切片属于所述至少一个支持的网络切片，且第一网络切片属于所述至少一个允许的网络切片，则控制所述收发单元通过AS层发送所述第一业务的会话建立请求；
    如果所述第一网络切片不属于所述至少一个支持的网络切片，或第一网络切片不属于所述至少一个允许的网络切片，则在AS层向NAS层发送反馈信息，所述反馈信息用于指示第一网络切片不属于所述至少一个支持的网络切片。
  19. 一种通信装置，其特征在于，包括：
    收发单元，用于获取指示信息，所述指示信息用于指示以下至少一项：
    终端设备对应的第一业务支持或不支持网络切片重映射、所述第一业务支持或不支持网络切片回退、所述终端设备支持或不支持小区重定向、至少一个第二小区的信息、至少一个第二接入设备的信息，至少一个第二网络切片的信息，
    其中，所述第二小区支持所述第一网络切片，所述第二接入设备支持所述第一网络切片，所述第二网络切片属于所述支持的网络切片；
    处理单元，用于备根据所述指示信息与所述终端设备通信。
  20. 根据权利要求19所述的装置，其特征在于，所述收发单元用于从所述终端设备接收所述指示信息。
  21. 根据权利要求19或20所述的装置，其特征在于，所述处理单元还用于根据所述指示信息，从多种处理方式中确定符合所述指示信息指示的情况的第一处理方式，并根据所述第一处理方式与所述终端设备通信。
  22. 根据权利要求21所述的装置，其特征在于，所述多种处理方式包括以下至少两种处理方式：
    对所述第一业务进行网络切片重映射；
    将所述第一业务重映射至所述第二网络切片；
    对所述第一业务进行网络切片回退；
    对所述终端设备进行小区重定向；
    将所述终端设备重定向至所述第二小区；
    将所述终端设备重定向至所述第二接入设备的小区。
  23. 根据权利要求21或22所述的装置，其特征在于，所述处理单元还用于根据所述指示信息和所述多种处理方式中每种处理方式的优先级，确定所述第一处理方式。
  24. 根据权利要求19至23中任一项所述的装置，其特征在于，所述指示信息承载于所述第一业务的会话建立请求。
  25. 一种无线通信的装置，其特征在于，包括：
    用于实现权利要求1至6中任一项所述的方法的单元；或者
    用于实现权利要求7至12中任一项所述的方法的单元。
  26. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有计算机程序，当所述计算机程序运行时，
    使得装置执行如权利要求1至6中任意一项所述的方法，或者
    使得装置执行如权利要求7至12中任意一项所述的方法。
  27. 一种芯片系统，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，
    使得安装有所述芯片系统的通信装置执行如权利要求1至6中任意一项所述的方法；或者
    使得安装有所述芯片系统的通信装置执行如权利要求7至12中任意一项所述的方法。
PCT/CN2021/094053 2020-05-28 2021-05-17 通信方法和通信装置 WO2021238692A1 (zh)

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