WO2021189496A1

WO2021189496A1 - Method and device for use in data transmission of network slice

Info

Publication number: WO2021189496A1
Application number: PCT/CN2020/081881
Authority: WO
Inventors: 屈凯旸; 黄曲芳
Original assignee: 华为技术有限公司
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2021-09-30

Abstract

Disclosed are a method and device for use in data transmission of a network slice, related to the technical field of radio communication, capable of solving the problem of a UE in a deactivated state being unable to successfully complete an NSSAI service when the cell in which the UE resides does not support the NSSAI service. In the solution provided in the present application, when the transmission of NSSAI service data is required, the UE is capable of successfully completing, on the basis of RNA indication information received thereby used for indicating that one or more cells are capable of supporting the NSSAI service, the transmission of service data of the NSSAI service by accessing a cell supporting the NSSAI service.

Description

Data transmission method and equipment for network slicing

Technical field

The embodiments of the present application relate to the field of wireless communication technologies, and in particular, to a data transmission method and device for network slicing.

Background technique

The fifth generation of cellular mobile communications (5G) has introduced end-to-end network slicing in consideration of flexible allocation of network resources and on-demand networking. Specifically, 5G virtualizes multiple logical subnets (ie slices) with different characteristics and isolated from each other on the same physical facility to provide targeted services to users. Each slice is composed of wireless network, transmission network and core subnet slices. The services completed through slices may be referred to as slice services (or network slice selection assistance information (NSSAI) services).

User equipment (UE) usually has three states: connected state (RRC_CONNECTED state, also called connected state), deactivated state (RRC_INACTIVE state, also called inactive state), and idle state (RRC_IDLE state, also called idle state). Among them, when the UE is in the RRC_CONNECTED state, which cell the UE resides in is known to both the core network device and the access network device. When the UE is in the RRC_INACTIVE state, the cell in which the UE resides is known to the core network equipment, and the radio access network based notification area (RNA) of the UE is known to the access network equipment. Among them, the RNA may include the identities of multiple cells. When the UE enters the RRC_INACTIVE state from the RRC_CONNECTED state, the access network device (such as the base station) will notify the UE of the cell list contained in the RNA through an RRC release message. When the UE moves in a cell within the RNA range, it does not need to notify the access network device; if the UE moves to a cell outside the RNA range, it needs to notify the access network device.

In conventional technologies, the NSSAI service capabilities that can be supported by different cells are different. For example, cell A in the same RNA supports the slice A service, while cell B does not support the slice A service. Then when the UE moves to cell B in the RRC_INACTIVE state, if there is a demand for slice A service, but cell B does not support this type of service, the UE cannot complete the service.

Summary of the invention

This application provides a data transmission method and device for network slicing, which can solve the problem that a UE in a deactivated state cannot successfully complete the NSSAI service when the cell where it resides does not support the NSSAI service.

In order to achieve the foregoing objectives, the following technical solutions are adopted in the embodiments of this application:

In a first aspect, a data transmission method for network slicing is provided. The method includes: a UE receives RNA indication information from a radio access network notification area of a first access network device, where the RNA indication information is used to indicate one or more Each cell supports the ability of network slice selection to support information NSSAI services; if the UE has NSSAI service transmission requirements, the UE transmits the service data of the NSSAI service through the first cell; wherein, the first cell is one or more of the above-mentioned cells One, the first cell is a cell that supports NSSAI services.

According to the technical solution provided by the above-mentioned first aspect, when the UE has NSSAI service data transmission requirements, it can access the NSSAI service support based on the RNA indication information it receives to indicate the ability of one or more cells to support the NSSAI service. The cell successfully completed the transmission of the service data of the NSSAI service. In order to solve the problem that the UE cannot successfully complete the NSSAI service when the cell where it resides does not support the NSSAI service.

In a possible implementation manner, the foregoing UE receiving the RNA indication information from the first access network device specifically includes: the UE receiving the foregoing RNA indication information from the first access network device through a radio resource control release RRC release message; The RRC release message includes an RNA list, and the RNA list includes the one or more cells; wherein, the RNA indication information includes the ability of each cell in the RNA list to support the NSSAI service. The UE obtains the RNA list of one or more cells from the access network device and the ability of each cell in the RNA list to support NSSAI services, so that the UE can smoothly access a NSSAI service when there is a need for NSSAI service data transmission In order to successfully complete the transmission of NSSAI business data.

In a possible implementation, if the aforementioned UE has an NSSAI service transmission requirement, the UE transmits the NSSAI service data through the first cell, including: if the UE has an NSSAI service transmission requirement in the deactivated state, the UE sends the NSSAI service transmission requirement to the first cell The access network device to which it belongs sends a radio resource control RRC connection establishment request message, enters the connected state from the deactivated state, and transmits service data of the NSSAI service through the first cell. Through the above solution, when the UE has a NSSAI service data transmission requirement in the deactivated state, it can smoothly access a cell that supports the NSSAI service to successfully complete the NSSAI service data transmission.

In a possible implementation manner, the above-mentioned NSSAI service of the UE includes: the NSSAI service of the first service type and/or the NSSAI service of the second service type; where the first service type is processed before the UE enters the deactivated state NSSAI service type; the second service type is the NSSAI service type that the UE has not processed but needs to be processed. Through flexible service classification, it can be ensured that when the UE has different types of NSSAI service transmission requirements, the method provided in this application can smoothly complete the transmission of different types of NSSAI service data.

In a possible implementation manner, the above-mentioned first cell is a cell where the UE camps in a deactivated state. The UE may support the NSSAI service according to the first cell in which the UE camps in the deactivated state indicated by the RNA indication information, and determine to complete the transmission of the NSSAI service data through the first cell.

In a possible implementation manner, the aforementioned UE resides in the second cell in the deactivated state; the second cell is one of one or more cells, and the second cell does not support NSSAI services; if the UE is in the deactivated state There is an NSSAI service transmission requirement. The UE enters the connected state from the deactivated state, and transmits the service data of the NSSAI service through the first cell, which specifically includes: if the UE has a NSSAI service transmission requirement in the deactivated state, the UE accesses according to the RNA indication information The first cell enters the connected state from the deactivated state, and transmits service data of the NSSAI service through the first cell. The UE may support the NSSAI service in the second cell where the UE camps in the deactivated state indicated by the RNA indication information, but the first cell supports the NSSAI service, and determine that the NSSAI service data transmission is completed through the first cell.

In a possible implementation manner, the aforementioned UE camps on the second cell in the deactivated state; the second cell is one of one or more cells, and the second cell does not support NSSAI services; provided by this application The method further includes: if the UE has a non-NSSAI service transmission requirement in the deactivated state, the UE sends a radio resource control RRC connection establishment request message to the second access network device, enters the connected state from the deactivated state, and transmits the non-NSSAI service through the second cell. Service data of the NSSAI service; where the second access network device is the access network device to which the second cell belongs. If the service that the UE needs to initiate is a non-NSSAI service, the UE does not need to consider the ability of the cell where it resides to support NSSAI, and can directly complete the transmission of non-NSSAI service data through the cell where it resides.

In a possible implementation manner, the foregoing RRC connection establishment request message includes: indication information used to indicate whether the service data to be transmitted by the UE is the service data of the NSSAI service or the service data of the non-NSSAI service. By carrying the indication information of the service transmission requirements of the UE in the RRC connection establishment request message, the access network device can complete the subsequent channel migration according to the type of service to be initiated by the UE.

In a possible implementation manner, the foregoing RRC connection establishment request message is used to request the establishment of an RRC connection with the second access network device, and to request the second access network device to access the transmission channel corresponding to the non-NSSAI service from the first access network device. The network device switches to the second access network device. When the UE has non-NSSAI service data transmission requirements, the UE can request the establishment of an RRC connection through the RRC connection establishment request message, and request the transfer of the transmission channel corresponding to the non-NSSAI service to the corresponding access network device to complete the UE to the access network device , And the establishment of the non-NSSAI service transmission channel between the access network equipment and the core network equipment.

In a possible implementation manner, the foregoing RRC connection establishment request message is also used to request the second access network device to switch the transmission channel corresponding to the NSSAI service from the first access network device to the second access network device. In order to ensure the stability of the network, even if the UE has no NSSAI service data transmission requirements, the access network equipment can also migrate the transmission channel corresponding to the NSSAI service and the transmission channel corresponding to the non-NSSAI service to the base station of the cell where the UE resides.

In a possible implementation manner, the foregoing transmission channel is established between the first access network device or the second access network device and the user plane function UPF unit of the core network.

In a second aspect, a data transmission method for network slicing is provided. The method includes: before the UE enters the deactivated state, the first access network device sends the radio access network notification area RNA indication information to the UE; wherein, the The RNA indication information is used to indicate the capability of one or more cells to support the NSSAI service, and at least one of the one or more cells supports the NSSAI service.

In the technical solution provided by the above second aspect, before the UE enters the deactivated state, the first access network device sends to the UE the RNA indication information used to indicate the capability of one or more cells to support the NSSAI service. So that the UE can successfully complete the transmission of the NSSAI service data by accessing the cell that supports the NSSAI service according to the received RNA indication information when there is a requirement for NSSAI service data transmission. In order to solve the problem that the UE cannot successfully complete the NSSAI service when the cell where it resides does not support the NSSAI service.

In a possible implementation manner, the above-mentioned first access network device sends RNA indication information to the UE before the UE enters the deactivated state, which specifically includes: the first access network device transmits wirelessly before the UE enters the deactivated state. The resource control release RRC release message sends RNA indication information to the UE; the RRC release message includes an RNA list, and the RNA list includes the one or more cells; wherein the RNA indication information includes that each cell in the RNA list supports NSSAI services Ability. The access network device sends to the UE the RNA list of one or more cells and the ability of each cell in the RNA list to support the NSSAI service, so that the UE can smoothly access a NSSAI service when there is a need for NSSAI service data transmission In order to successfully complete the transmission of NSSAI business data.

In a possible implementation manner, the above-mentioned RNA indication information is determined by the first access network device referring to the ability information of at least one cell to support the NSSAI service type acquired from the access and mobility management function AMF unit; or, the RNA indication information It is determined by the first access network device with reference to the capability information of at least one cell to support the NSSAI service of the UE obtained from at least one access network device; the distance between the at least one access network device and the first access network device is Within the preset range. The access network device can obtain the capability information of at least one cell to support the NSSAI service type from the core network device (such as an AMF unit) or other adjacent access network devices to determine the RNA indication information sent to the UE, which is easy to implement.

In a possible implementation manner, the above method further includes: the first access network device receives a radio resource control RRC connection establishment request message sent by the UE when there is a transmission demand for the NSSAI service; the RRC connection establishment request message is used for Request to restore the RRC connection with the first access network device; the first access network device restores the RRC connection between the first access network device and the UE; the first access network device transmits service data of the NSSAI service of the UE.

In a possible implementation manner, the foregoing first access network device is an access network device of a first cell; wherein, the first cell is a cell where the UE resides in a deactivated state, and the first cell supports NSSAI services; Alternatively, the first cell is not a cell where the UE camps in the deactivated state, and the first cell is a cell that supports the NSSAI service among one or more cells indicated by the RNA indication information. Through the above solution, when the UE has an NSSAI service data transmission requirement in the deactivated state, it can smoothly complete the NSSAI service data transmission through the cell supporting the NSSAI service where it resides. Or when the cell where it resides does not support the NSSAI service, it can successfully complete the transmission of the NSSAI service data by accessing another cell that supports the NSSAI service.

In a possible implementation manner, the foregoing RRC connection establishment request message includes: indication information used to indicate that the service data to be transmitted by the UE is service data of the NSSAI service. By carrying the indication information of the service transmission requirements of the UE in the RRC connection establishment request message, the access network device can complete the subsequent channel migration according to the type of service to be initiated by the UE.

In a possible implementation manner, after the first access network device transmits the service data of the NSSAI service of the UE, the foregoing method further includes: the first access network device connects the transmission channel corresponding to the NSSAI service from the first access The network device is switched to the third access network device or the first access network device; where the third access network device is an access network device whose signal strength and/or signal quality received by the UE meets a preset condition.

In a third aspect, a data transmission method for network slicing is provided. The method includes: a second access network device receives a radio resource control RRC connection establishment request message from a UE in a deactivated state; the RRC connection establishment request message Used to request to establish an RRC connection with the second access network device; the RRC connection establishment request message includes service data used to indicate whether the service data to be transmitted by the UE is network slice selection support information NSSAI service service data or non-NSSAI service service data Information indicating the service transmission requirements of the UE; the second access network device establishes an RRC connection between the second access network device and the UE according to the RRC connection establishment request message; the second access network device transmits the service data of the UE .

In the technical solution provided by the foregoing third aspect, the third access network device can establish an RRC connection with the UE according to an RRC connection establishment request message from the UE, and support the UE to complete service data transmission.

In a possible implementation manner, the above-mentioned second access network device is an access network device to which the first cell belongs; wherein, the first cell is the cell where the UE resides in the deactivated state, and the first cell supports NSSAI service; or, the first cell is not the cell where the UE resides in the deactivated state, and the first cell is a cell that supports the NSSAI service. Through the above solution, when the UE has a NSSAI service data transmission requirement in the deactivated state, it can smoothly complete the NSSAI service data transmission through the cell supporting the NSSAI service where it resides. Or when the cell where it resides does not support the NSSAI service, it can successfully complete the transmission of the NSSAI service data by accessing another cell that supports the NSSAI service.

In a possible implementation manner, the indication information of the service transmission requirement above indicates that the service data to be transmitted by the UE is service data of a non-NSSAI service; the RRC connection establishment request message is also used to request the second access network device to The transmission channel corresponding to the non-NSSAI service is switched from the first access network device to the second access network device; the second access network device establishes an RRC connection between the second access network device and the UE according to the RRC connection establishment request message After that, the above method further includes: the second access network device sends a transmission channel migration request to the access and mobility management function AMF unit according to the RRC connection establishment request message to request the transmission channel corresponding to the non-NSSAI service to be accessed from the first The network device switches to the second access network device. When the UE has non-NSSAI service data transmission requirements, the UE can request the establishment of an RRC connection through the RRC connection establishment request message, and request the transfer of the transmission channel corresponding to the non-NSSAI service to the corresponding access network device to complete the UE to the access network device , And the establishment of the non-NSSAI service transmission channel between the access network equipment and the core network equipment.

In a possible implementation manner, the foregoing RRC connection establishment request message is also used to request the second access network device to switch the transmission channel corresponding to the NSSAI service from the first access network device to the second access network device; the foregoing transmission The channel migration request is also used to request to switch the transmission channel corresponding to the NSSAI service from the first access network device to the second access network device. In order to ensure the stability of the network, even if the UE has no NSSAI service data transmission requirements, the access network equipment can also migrate the transmission channel corresponding to the NSSAI service and the transmission channel corresponding to the non-NSSAI service to the base station of the cell where the UE resides.

In a possible implementation manner, after the second access network device transmits the service data of the UE, the method further includes: the second access network device switches the transmission channel corresponding to the non-NSSAI service to the first Three access network equipment or the first access network equipment; where the third access network equipment is the access network equipment whose signal strength and/or signal quality received by the UE meets the preset conditions, and the first access network equipment is The last serving access network device before the UE enters the deactivated state.

In a fourth aspect, a data transmission method for network slicing is provided. The method includes: if the UE has a non-NSSAI service transmission requirement in a deactivated state, the UE sends a radio resource control RRC connection establishment request to a second access network device The message enters the connected state from the deactivated state, and transmits the service data of the non-NSSAI service through the second cell; where the second access network device is the access network device to which the second cell belongs.

In the technical solution provided by the above fourth aspect, if the service that the UE needs to initiate is a non-NSSAI service, the UE does not need to consider the ability of the cell in which it resides to support NSSAI, and can directly complete the transmission of non-NSSAI service data through the cell in which it resides.

In a fifth aspect, a data transmission method for network slicing is provided. The method includes: before the UE enters the deactivation state, the first access network device sends the radio access network notification area RNA indication information to the UE; the RNA indication The information is used to indicate the ability of one or more cells to support NSSAI services; if the UE has NSSAI service transmission requirements, the UE transmits service data of the NSSAI service through the first cell; where the first cell is one or more indicated by the RNA indication information One of the cells, the first cell is a cell that supports the NSSAI service.

According to the technical solution provided by the above fifth aspect, when the UE has a NSSAI service data transmission requirement, it can access the NSSAI service support based on the RNA indication information it receives to indicate the ability of one or more cells to support the NSSAI service. The cell successfully completed the transmission of the service data of the NSSAI service. In order to solve the problem that the UE cannot successfully complete the NSSAI service when the cell where it resides does not support the NSSAI service.

In a possible implementation manner, before the UE enters the deactivated state, the first access network device sends the radio access network notification area RNA indication information to the UE, which specifically includes: the first access network device enters in E Before the activation state, the RNA indication information is sent to the UE through the radio resource control release RRC release message; the RRC release message includes the RNA list, and the RNA list includes the one or more cells; wherein, the RNA indication information includes every item in the RNA list. The ability of a cell to support NSSAI services. The UE obtains the RNA list of one or more cells from the access network device and the ability of each cell in the RNA list to support NSSAI services, so that the UE can smoothly access a NSSAI service when there is a need for NSSAI service data transmission In order to successfully complete the transmission of NSSAI business data.

In a possible implementation manner, the above-mentioned first cell is the cell where the UE resides in the deactivated state; if the UE has an NSSAI service transmission requirement, the UE transmits the service data of the NSSAI service through the first cell, including: if the UE has For NSSAI service transmission requirements, the UE sends a radio resource control RRC connection establishment request message to the first access network device; the first access network device is the access network device to which the first cell belongs; the first access network device resumes the first connection The RRC connection between the network access device and the UE; the first access network device transmits service data of the NSSAI service of the UE. The UE may support the NSSAI service according to the first cell in which the UE camps in the deactivated state indicated by the RNA indication information, and determine to complete the transmission of the NSSAI service data through the first cell.

In a possible implementation manner, the above-mentioned first cell is the cell where the UE resides in the deactivated state; if the UE has an NSSAI service transmission requirement, the UE transmits the service data of the NSSAI service through the first cell, including: if the UE has For NSSAI service transmission requirements, the UE sends a radio resource control RRC connection establishment request message to the second access network device; the second access network device is the access network device to which the first cell belongs; the second access network device establishes the second connection The RRC connection between the network access device and the UE; the second access network device transmits service data of the NSSAI service of the UE. The UE may support the NSSAI service according to the first cell in which the UE camps in the deactivated state indicated by the RNA indication information, and determine to complete the transmission of the NSSAI service data through the first cell.

In a possible implementation, the aforementioned UE camps on the second cell in the deactivated state; the second cell is one of the one or more cells indicated by the RNA indication information, and the second cell does not support NSSAI services. ; If the UE has an NSSAI service transmission requirement, the UE transmits the service data of the NSSAI service through the first cell, including: if the UE has an NSSAI service transmission requirement in the deactivated state, the UE accesses the first cell according to the RNA indication information; the UE transmits to the first cell The second access network device sends a radio resource control RRC connection establishment request message; the second access network device is the access network device to which the first cell belongs; the second access network device establishes a connection between the second access network device and the UE RRC connection; the second access network device transmits service data of the NSSAI service of the UE. The UE may support the NSSAI service in the second cell where the UE camps in the deactivated state indicated by the RNA indication information, but the first cell supports the NSSAI service, and determine that the NSSAI service data transmission is completed through the first cell.

In a possible implementation manner, the aforementioned UE camps on the second cell in the deactivated state; the second cell is one of the one or more cells indicated by the RNA indication information, and the second cell does not support the NSSAI service; The method further includes: if the UE has a non-NSSAI service transmission requirement in the deactivated state, the UE sends a radio resource control RRC connection establishment request message to the second access network device; the second access network device is the access to which the second cell belongs Network equipment; the second access network equipment establishes an RRC connection between the second access network equipment and the UE; the second access network equipment transmits service data of the UE’s non-NSSAI services. If the service that the UE needs to initiate is a non-NSSAI service, the UE does not need to consider the ability of the cell where it resides to support NSSAI, and can directly complete the transmission of non-NSSAI service data through the cell where it resides.

In a possible implementation manner, the foregoing RRC connection establishment request message includes: a UE service for indicating whether the service data to be transmitted by the UE is the service data of the NSSAI service or the service data of the non-NSSAI service Instructions for transmission requirements. By carrying the indication information of the service transmission requirements of the UE in the RRC connection establishment request message, the access network device can complete the subsequent channel migration according to the type of service to be initiated by the UE.

In a possible implementation manner, the foregoing RRC connection establishment request message is also used to request the second access network device to switch the transmission channel corresponding to the non-NSSAI service from the first access network device to the second access network device; After the second access network device establishes the RRC connection between the second access network device and the UE, the above method further includes: the second access network device sends a transmission to the access and mobility management function AMF unit according to the RRC connection establishment request message The channel migration request is used to request to switch the transmission channel corresponding to the non-NSSAI service from the first access network device to the second access network device; the AMF unit switches the transmission channel corresponding to the non-NSSAI service from the first access network device to the second access network device; The second access network device. When the UE has non-NSSAI service data transmission requirements, the UE can request the establishment of an RRC connection through the RRC connection establishment request message, and request the transfer of the transmission channel corresponding to the non-NSSAI service to the corresponding access network device to complete the UE to the access network device , And the establishment of the non-NSSAI service transmission channel between the access network equipment and the core network equipment.

In a possible implementation manner, the foregoing RRC connection establishment request message is also used to request the second access network device to switch the transmission channel corresponding to the NSSAI service from the first access network device to the second access network device; the foregoing transmission The channel migration request is also used to request that the transmission channel corresponding to the NSSAI service be switched from the first access network device to the second access network device; the above method further includes: the AMF unit transfers the transmission channel corresponding to the NSSAI service from the first access network The device switches to the second access network device. In order to ensure the stability of the network, even if the UE has no NSSAI service data transmission requirements, the access network equipment can also migrate the transmission channel corresponding to the NSSAI service and the transmission channel corresponding to the non-NSSAI service to the base station of the cell where the UE resides.

In a possible implementation manner, after the second access network device transmits the service data of the UE; the foregoing method further includes: the second access network device switches the transmission channel corresponding to the non-NSSAI service to the third access Network equipment or the first access network equipment; where the third access network equipment is the access network equipment that the signal strength and/or signal quality received by the UE meets the preset conditions, and the first access network equipment is the access network equipment that the UE enters The last service access network device before activation.

In a possible implementation manner, after the UE transmits the service data of the NSSAI service through the first cell, the above method further includes: the first access network device switches the UE to the third access network device; and the third access network The device is an access network device whose signal strength and/or signal quality received by the UE meet a preset condition.

In a possible implementation manner, after the UE transmits the service data of the NSSAI service through the first cell, the above method further includes: the second access network device switches the UE to the third access network device or the first access network Equipment; wherein, the third access network equipment is the access network equipment that the signal strength and/or signal quality received by the UE meets the preset conditions, and the first access network equipment is the UE is the UE enters the deactivated state The last service access network equipment before.

In a possible implementation manner, after the second access network device transmits the service data of the non-NSSAI service of the UE, the above method further includes: the second access network device switches the UE to the third access network device or the second access network device. An access network device; where the third access network device is an access network device whose signal strength and/or signal quality received by the UE meets preset conditions, and the first access network device is the one before the UE enters the deactivated state Finally, serve the access network equipment.

In a sixth aspect, a UE is provided. The UE includes: a transceiver unit, configured to receive RNA indication information from a radio access network notification area from a first access network device, where the RNA indication information is used to indicate that one or more cells support The network slice selects the ability to support information NSSAI services; the processing unit is used to determine if the UE has NSSAI service transmission requirements, determine to transmit the service data of the NSSAI service through the first cell; wherein, the first cell is one or more of the above-mentioned cells The first cell is a cell that supports NSSAI services.

According to the technical solution provided by the above sixth aspect, when the UE has an NSSAI service data transmission requirement, it can access the NSSAI service support based on the RNA indication information it receives to indicate the ability of one or more cells to support the NSSAI service. The cell successfully completed the transmission of the service data of the NSSAI service. In order to solve the problem that the UE cannot successfully complete the NSSAI service when the cell where it resides does not support the NSSAI service.

In a possible implementation manner, the foregoing transceiver unit receiving the RNA indication information from the first access network device specifically includes: the transceiver unit receives the foregoing RNA indication information from the first access network device through a radio resource control release RRC release message The RRC release message includes an RNA list, and the RNA list includes the one or more cells; wherein, the RNA indication information includes the ability of each cell in the RNA list to support NSSAI services. The UE obtains the RNA list of one or more cells from the access network device and the ability of each cell in the RNA list to support NSSAI services, so that the UE can smoothly access a NSSAI service when there is a need for NSSAI service data transmission In order to successfully complete the transmission of NSSAI business data.

In a possible implementation, if the UE has a NSSAI service transmission requirement, the processing unit determines to transmit the NSSAI service data through the first cell, including: if the UE has a NSSAI service transmission requirement in the deactivated state, the processing unit indicates The transceiver unit sends a radio resource control RRC connection establishment request message to the access network device to which the first cell belongs, so that the UE enters the connected state from the deactivated state, and transmits service data of the NSSAI service through the first cell. Through the above solution, when the UE has a NSSAI service data transmission requirement in the deactivated state, it can smoothly access a cell that supports the NSSAI service to successfully complete the NSSAI service data transmission.

In a possible implementation manner, the aforementioned UE camps on the second cell in a deactivated state; the second cell is one of one or more cells, and the second cell does not support the NSSAI service; the aforementioned transceiver unit also It is used to send a radio resource control RRC connection establishment request message to the second access network device if the UE has a non-NSSAI service transmission requirement in the deactivated state, so that the UE enters the connected state from the deactivated state, and transmits non-NSSAI services through the second cell. Service data of the NSSAI service; where the second access network device is the access network device to which the second cell belongs. If the service that the UE needs to initiate is a non-NSSAI service, the UE does not need to consider the ability of the cell where it resides to support NSSAI, and can directly complete the transmission of non-NSSAI service data through the cell where it resides.

In a seventh aspect, a first access network device, the first access network device includes: a transceiver unit, configured to send RNA indication information of a radio access network notification area to the UE before the UE enters the deactivated state; wherein, The RNA indication information is used to indicate the capability of one or more cells to support the NSSAI service, and at least one of the one or more cells supports the NSSAI service.

In the technical solution provided by the seventh aspect, the first access network device sends to the UE RNA indication information used to indicate the ability of one or more cells to support NSSAI services before the UE enters the deactivated state. So that the UE can successfully complete the transmission of the NSSAI service data by accessing the cell that supports the NSSAI service according to the received RNA indication information when there is a requirement for NSSAI service data transmission. In order to solve the problem that the UE cannot successfully complete the NSSAI service when the cell where it resides does not support the NSSAI service.

In a possible implementation manner, the above transceiver unit sends RNA indication information to the UE before the UE enters the deactivated state, which specifically includes: the transceiver unit sends the RRC release message to the UE through the radio resource control release before the UE enters the deactivated state. Send RNA indication information; the RRC release message includes an RNA list, and the RNA list includes the one or more cells; wherein the above RNA indication information includes the ability of each cell in the RNA list to support NSSAI services. The access network device sends to the UE the RNA list of one or more cells and the ability of each cell in the RNA list to support the NSSAI service, so that the UE can smoothly access a NSSAI service when there is a need for NSSAI service data transmission In order to successfully complete the transmission of NSSAI business data.

In a possible implementation manner, the foregoing first access network device further includes: a processing unit, configured to determine the foregoing RNA by referring to the capability information of at least one cell to support the NSSAI service type obtained from the access and mobility management function AMF unit Indication information; or, referring to the capability information of at least one cell to support the NSSAI service of the UE obtained from at least one access network device to determine the RNA indication information, the distance between the at least one access network device and the first access network device is Within the preset range. The access network device can obtain the capability information of at least one cell to support the NSSAI service type from the core network device (such as an AMF unit) or other adjacent access network devices to determine the RNA indication information sent to the UE, which is easy to implement.

In a possible implementation manner, the foregoing transceiver unit is further configured to receive a radio resource control RRC connection establishment request message sent by the UE when there is a transmission demand for the NSSAI service; the RRC connection establishment request message is used to request communication with the first The access network device restores the RRC connection; the first access network device restores the RRC connection between the first access network device and the UE; the first access network device transmits service data of the NSSAI service of the UE.

In a possible implementation manner, the above processing unit is further configured to switch the transmission channel corresponding to the NSSAI service from the first access network device to the third access after the above transceiver unit transmits the service data of the NSSAI service of the UE. Network equipment or first access network equipment; where the third access network equipment is an access network equipment whose signal strength and/or signal quality received by the UE meets a preset condition.

In an eighth aspect, a second access network device is provided. The second access network device includes: a transceiver unit, configured to receive a radio resource control RRC connection establishment request message from a UE in a deactivated state; the RRC connection establishment The request message is used to request the establishment of an RRC connection with the second access network device; the RRC connection establishment request message includes the service data used to indicate whether the service data to be transmitted by the UE is network slice selection support information NSSAI service service data or non-NSSAI service Indication information of the UE’s service transmission requirements for service data; a processing unit, used to establish an RRC connection between the second access network device and the UE according to the RRC connection establishment request message; the above transceiver unit is also used to transmit the UE’s service data .

In the technical solution provided by the above eighth aspect, the third access network device can establish an RRC connection with the UE according to the RRC connection establishment request message from the UE, and support the UE to complete service data transmission.

In a possible implementation manner, the above-mentioned second access network device is an access network device to which the first cell belongs; wherein, the first cell is the cell where the UE resides in the deactivated state, and the first cell supports NSSAI service; or, the first cell is not the cell where the UE resides in the deactivated state, and the first cell is a cell that supports the NSSAI service. Through the above solution, when the UE has an NSSAI service data transmission requirement in the deactivated state, it can smoothly complete the NSSAI service data transmission through the cell supporting the NSSAI service where it resides. Or when the cell where it resides does not support the NSSAI service, it can successfully complete the transmission of the NSSAI service data by accessing another cell that supports the NSSAI service.

In a possible implementation manner, the indication information of the service transmission requirement above indicates that the service data to be transmitted by the UE is service data of a non-NSSAI service; the RRC connection establishment request message is also used to request the second access network device to The transmission channel corresponding to the non-NSSAI service is switched from the first access network device to the second access network device; the second access network device establishes an RRC connection between the second access network device and the UE according to the RRC connection establishment request message After that, the above-mentioned transceiver unit is also used to send a transmission channel migration request to the access and mobility management function AMF unit according to the RRC connection establishment request message, for requesting to switch the transmission channel corresponding to the non-NSSAI service from the first access network device to The second access network device. When the UE has non-NSSAI service data transmission requirements, the UE can request the establishment of an RRC connection through the RRC connection establishment request message, and request the transfer of the transmission channel corresponding to the non-NSSAI service to the corresponding access network device to complete the UE to the access network device , And the establishment of the non-NSSAI service transmission channel between the access network equipment and the core network equipment.

In a possible implementation manner, after the second access network device transmits the service data of the UE, the processing unit is further configured to switch the transmission channel corresponding to the non-NSSAI service to the third access network Device or first access network device; wherein, the third access network device is the access network device whose signal strength and/or signal quality received by the UE meets preset conditions, and the first access network device is the UE entering and deactivating The last service access network device before the state.

In a ninth aspect, a UE is provided. The UE includes a transceiver unit, configured to send a radio resource control RRC connection establishment request message to a second access network device if the UE has a non-NSSAI service transmission requirement in a deactivated state, and The deactivated state enters the connected state, and the service data of the non-NSSAI service is transmitted through the second cell; where the second access network device is the access network device to which the second cell belongs.

In the technical solution provided by the above-mentioned ninth aspect, if the service that the UE needs to initiate is a non-NSSAI service, the UE does not need to consider the ability of the cell where it resides to support NSSAI, and can directly complete the transmission of non-NSSAI service data through the cell where it resides.

In a tenth aspect, a UE is provided. The UE includes: a memory for storing computer program code, the computer program code including instructions; a radio frequency circuit for transmitting and receiving wireless signals; and a processor for executing the above instructions , Enabling the UE to execute the data transmission method for network slicing in any possible implementation manner of the first aspect or the fourth aspect.

In an eleventh aspect, a first access network device is provided. The first access network device includes: a memory for storing computer program code, the computer program code including instructions; a radio frequency circuit for transmitting wireless signals And receiving; a processor, configured to execute the foregoing instructions, so that the UE executes the data transmission method for network slicing in any one of the possible implementation manners of the second aspect.

In a twelfth aspect, a second access network device is provided. The second access network device includes: a memory for storing computer program code, the computer program code including instructions; and a radio frequency circuit for transmitting wireless signals And receiving; a processor, configured to execute the foregoing instructions, so that the UE executes the data transmission method for network slicing in any one of the possible implementation manners of the third aspect.

In a thirteenth aspect, a communication system is provided, the communication system includes: a UE in any possible implementation manner of the sixth aspect or the tenth aspect, and in any possible implementation manner of the second aspect or the eleventh aspect The first access network device.

In a possible implementation manner, the communication system further includes the second access network device in any possible implementation manner of the seventh aspect or the twelfth aspect.

In a fourteenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are executed by a processor, the first aspect, the second aspect, the third aspect, and the A data transmission method for network slicing in any possible implementation manner of the fourth aspect or the fifth aspect.

In a fifteenth aspect, a chip system is provided. The chip system includes a processor and a memory, and instructions are stored in the memory; when the instructions are executed by the processor, the first aspect, the second aspect, and the A data transmission method for network slicing in any possible implementation manner of the third aspect, the fourth aspect, or the fifth aspect. The chip system can be composed of chips, or it can include chips and other discrete devices.

In a sixteenth aspect, a computer program product is provided, which when it runs on a computer, enables implementation of any one of the possible implementation manners of the first, second, third, fourth, or fifth aspect The data transmission method used for network slicing.

Description of the drawings

FIG. 1 is a diagram of a communication network architecture provided by an embodiment of this application;

Figure 2 is a diagram of a network slicing service architecture provided by an embodiment of the application;

FIG. 3 is a schematic structural diagram of a UE provided by an embodiment of the application;

FIG. 4 is a schematic structural diagram of a network device provided by an embodiment of this application;

Figure 5 is a structural diagram of a protocol stack reserved on the base station side when the UE is in a connected state, a deactivated state, and an idle state according to an embodiment of the application;

FIG. 6 is an interaction diagram 1 of a data transmission method for network slicing provided by an embodiment of this application;

FIG. 7 is a diagram of two examples of a UE accessing a core network through a cell in an RNA list according to an embodiment of the application; FIG.

FIG. 8 is a diagram of three examples of a UE accessing a core network through a cell in an RNA list according to an embodiment of the application; FIG.

FIG. 9 is a diagram of an example of RNA indication information provided by an embodiment of the application; FIG.

FIG. 10 is a diagram of another example of RNA indication information provided by an embodiment of the application; FIG.

FIG. 11 is an interaction diagram 2 of a data transmission method for network slicing provided by an embodiment of this application;

FIG. 12 is an interaction diagram 3 of a data transmission method for network slicing provided by an embodiment of this application;

FIG. 13 is an example diagram of transmission channel migration in a non-NSSAI service transmission scenario provided by an embodiment of the application;

FIG. 14 is an interaction diagram 4 of a data transmission method for network slicing provided by an embodiment of this application;

15 is an example diagram of transmission channel migration in another non-NSSAI service transmission scenario provided by an embodiment of the application;

16 is an interaction diagram 5 of a data transmission method for network slicing provided by an embodiment of this application;

FIG. 17 is a structural block diagram of a UE provided by an embodiment of this application;

FIG. 18 is a structural block diagram of a network device provided by an embodiment of this application;

FIG. 19 is a schematic structural diagram of a UE/network device provided by an embodiment of this application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The embodiments of this application are applicable but not limited to the following communication systems: narrowband-internet of things (NB-IoT) system, wireless local access network (WLAN) system, long term evolution (LTE) ) System, the fifth generation of mobile networks (5th generation mobile networks or 5G), also known as new radio (NR) systems, or communication systems after 5G, such as 6G systems, device-to-device (device-to-device) to device, D2D) communication system, car networking, etc.

Please refer to FIG. 1, which shows a communication network architecture diagram provided by an embodiment of the present application. Among them, Figure 1 uses the network service architecture of the 5G system as an example to show the interaction between network functions and entities and the corresponding interfaces. The 3GPP service-based architecture (SBA) of the 5G system includes the network Functions and entities mainly include: user equipment (UE), access network (AN) or radio access network (RAN), user plane function (UPF), data network (data network, DN), access management function (AMF), session management function SMF, authentication server function (authentication server function, AUSF), policy control function (PCF), application function (application function, AF), network slice selection function (NSSF), unified data management (UDM), network exposure function (NEF) and network storage function (NF repository function, NRF) .

Among them, UE, AN/RAN, UPF and DN are generally called user plane network functions and entities (or user plane network elements), and the other parts are generally called control plane network functions and entities (or control plane network elements) . Control plane network elements are defined by 3GPP for processing functions in a network. Control plane network elements have 3GPP-defined functional behaviors and 3GPP-defined interfaces. The network function can be used as a network element running on proprietary hardware, or running on Software instances on proprietary hardware, or virtual functions instantiated on a suitable platform, such as being implemented on a cloud infrastructure device.

The main functions of each network element are described in detail below.

AN/RAN: AN/RAN can be base stations in various forms, such as macro base stations, micro base stations (also called "small stations"), distributed unit-control units (DU-CU), etc., Among them, the DU-CU is a device that is deployed in a radio access network and can communicate with the UE wirelessly. In addition, the aforementioned base station may also be a wireless controller in a cloud radio access network (CRAN) scenario, or a relay station, access point, vehicle-mounted device, wearable device, or a public land mobile network (public land mobile network) that will evolve in the future. land mobile network, PLMN) network equipment, etc. in the network. AN/RAN can also be a broadband network service gateway (broadband network gateway, BNG), convergence switch, non-3GPP access equipment, etc. AN/RAN is mainly responsible for radio resource management on the air interface side, uplink and downlink data classification, quality of service (QoS) management, data compression and encryption, and completion of signaling processing with control plane network elements or completion with user plane function network elements Data forwarding and other functions. The embodiments of this application do not limit the specific form and structure of AN/RAN. For example, in systems using different wireless access technologies, the names of devices with base station functions may be different. For example, the base station can be an evolved universal terrestrial radio access network (E-UTRAN) equipment in LTE, such as an evolved NodeB (evolutional NodeB, eNB or e-NodeB), or it can be 5G The next generation radio access network (NG-RAN) equipment (such as gNB) in the system, etc.

UPF: Mainly responsible for packet routing and forwarding, as well as QoS processing of user plane data or accounting information statistics. The transmission resources and scheduling functions that provide services for the UE in the UPF are managed and controlled by the SMF. Specifically, the functions of UPF include: 1) Mobility anchor point of this system/different system; 2) PDN session node connecting with external data network; 3) Data packet routing/forwarding, which can receive user data from DN and pass (R ) AN transmits to UE, UPF can also receive user data from UE through (R) AN, and forward it to DN. The transmission resources and scheduling functions of UPF network element for UE are managed and controlled by SMF; 4) Policy rule execution user plane Part and data packet detection; 5) Traffic usage report; 6) Uplink classification supports service flow routing to external data networks; 7) Supports bifurcation points of multi-connection PDU sessions; 8) User plane QoS processing, such as packet filtering, Uplink and downlink current limiting, select to pass; 9) Uplink service verification; 10) Uplink and downlink transmission layer data packet marking; 11) Downlink data packet buffer and trigger downlink data indication.

DN: DN is the network used to transmit data. For example, the DN can be an operator service network, Internet access, or a third-party service network. The DN can exchange information with the UE through the PDU session. Among them, PDU sessions can be divided into multiple types, such as Internet protocol version 4 (IPv4), IPv6, and so on.

AMF: Mainly responsible for the processing of control plane messages, such as: access control, mobility management, lawful interception, access authentication/authorization, etc. Specifically, the functions of AMF mainly include: 1) processing the access network control plane; 2) processing NAS messages, responsible for NAS encryption and integrity protection; 3) registration management; 4) connection management; 5) access 6) Mobility management; 7) Legal information interception; 8) Provide session management messages between UE and SMF; 9) Realize transparent transmission of routed session management (SM) messages, similar to transparent transmission proxy; 10) Access authentication; 11) Access authorization; 12) Forward SMS messages (short messages) between UE and SMSF; 13) Interact with AUSF and UE to obtain UE authentication intermediate key; 14) Calculation A specific key to access the network.

SMF: Mainly used for session management, UE's Internet Protocol (IP) address allocation and management, selection of end points that can manage user plane functions, policy control and charging function interfaces, downlink data notifications, etc. Specifically, the main functions of SMF are: 1) Session management, session establishment, modification and release, including channel maintenance between UPF and AN nodes; 2) UE IP address allocation and management; 3) Selection and control of user plane functions 4) Configure correct service routing on UPF; 5) Landing execution of policy control function; 6) Control part of policy execution and QoS; 7) Legal interception; 8) Process session management part in NAS message; 9) Downlink data Instruction; 10) Initiate specific session management information of the access network (routed via AMF); 11) Determine the mode of continuity with the service in the session; 12) Roaming function.

PCF: Mainly used to provide UE policy rules, AM policy rules and SM policy rules related parameters to UE, AMF or SMF respectively, manage user subscription information, and connect to UDM to access subscription user information related to policy decisions. PCF generally makes strategic decisions based on contract information and so on.

NRF: Mainly used to provide internal/external addressing functions, receive query requests from other network elements for a certain type of network element, and return information about related network elements, etc.

AUSF: Mainly responsible for network security, used to generate keys, realize two-way authentication for the UE, and support a unified authentication framework.

AF: used to provide services, mainly used for: 1) application impact on business routing; 2) exposure of network access capabilities; 3) interaction with policy framework for policy control.

NSSF: Mainly used for network slice instance (network slice instance, NSI) selection and management, to determine the mapping between allowed network slice information and used network slice information, and to determine configured network slice information and subscribed network slice information Mapping.

NEF: It is the interface network element for two-way information interaction between the network and external entities. It is also a logical unit for internal information distribution and aggregation. It mainly includes three capabilities: monitoring capabilities, supply capabilities, and strategy/billing capabilities; among them, the monitoring capabilities are mainly Refers to the monitoring of special events of the UE and output of monitoring information. For example, it can output UE location information, connectivity, roaming status, connection retention, etc. through NEF; supply capability means that external entities can provide information through NEF for UE Used, this information can include mobility management and session management information, such as periodic communication time, communication duration, and scheduled communication time; policy/charging capability refers to external entities passing requirements through NEF to process QoS and charging policies.

UDM: consists of two parts, one is called the application front end (FE), and the other is called the user data warehouse (UDR); the application front end is mainly used for: 1) authentication and credit processing; 2) user identification processing; 3) access authorization; 4 ) Registration/mobility management; 5) Subscription management; 6) Short message management.

Among them, the data to be transmitted can be transmitted through the PDU session established between the UE and the DN (that is, the communication bearer described in the specification), and the transmission will pass through two network functional entities (R)AN and UPF, UE and (R) An air interface technology is used to communicate between ANs. N1 is the interface point between UE and AMF, N2 is the interface point between (R)AN and AMF, N3 is the interface between (R)AN and UPF, and N4 It is the interface between SMF and UPF, N6 is UPF is the interface between DN; Namf is the service-based interface displayed by AMF, Nsmf is the service-based interface displayed by SMF, Nausf is the service-based interface displayed by AUSF, Nnssf It is the service-based interface displayed by NSSF, Nnef is the service-based interface displayed by NEF, Nnrf is the service-based interface displayed by NRF, Npcf is the service-based interface displayed by PCF, Nudm is the service-based interface displayed by UDM, Naf Service-based interface presented for AF.

It can be understood that with the development of mobile communication technology, various new services and application scenarios continue to emerge, and these services have very different requirements for network functions, connection performance, and security. If a single network is used to carry these services, it will be difficult to meet the requirements of high bandwidth, low latency, and high reliability at the same time. In addition, building a separate network for each business will bring huge costs. This requires 5G to meet different business needs while being flexible and scalable. To this end, 5G provides users with customized network services through end-to-end network slices. Through the flexible allocation of network resources and on-demand networking, 5G virtualizes multiple physical facilities with different characteristics on the same set of physical facilities. And separate logical subnets to provide targeted services to users, that is, Slice.

The solution provided in the embodiment of the present application is mainly used for a network architecture based on network slicing. Take the 5G system communication network architecture diagram based on network slicing as an example. The communication system to which the solution provided in the embodiments of the present application is applicable may include a UE, an access network (AN) or a radio access network (RAN), and multiple network slices. Please refer to FIG. 2, which shows an architecture diagram of a network slicing communication system provided by an embodiment of the present application. As shown in Figure 2, the network slice communication system may include UE, base station (ie AN/RAN), UPF, DN (such as DN1 and DN2), AMF, SMF, PCF, NSSF and NRF.

Based on the above-mentioned user plane network elements and control plane network elements, in order to virtualize multiple mutually isolated logical subnets, including slice#1, slice#2, and slice#3. As shown in Figure 2, slice#1 is composed of UE, base station, AMF, PCF#1, NRF#1, SMF#1, PCF#1, and UPF#1. slice#2 is composed of UE, base station, AMF, PCF#2, NRF#2, SMF#2, PCF#2, and UPF#2. slice#3 is composed of UE, base station, AMF, PCF#3, NRF#3, SMF#3, PCF#3, and UPF#3. Among them, PCF#1, PCF#2, and PCF#3 are isolated network slices virtualized based on PCF. NRF#1, NRF#2, and NRF#3 are isolated network slices virtualized by NRF. SMF#1, SMF#2, and SMF#3 are isolated network slices virtualized by SMF. PCF#1, PCF#2, and PCF#3 are isolated network slices virtualized by PCF. UPF#1, UPF#2, and UPF#3 are isolated network slices virtualized by UPF. Slice#1, slice#2, and slice#3 can be used as independent channels to provide services for services with different requirements for mobility, billing, security, policy control, delay, and reliability.

The UE in this application may be a desktop device, a laptop device, a handheld device, a wearable device, a smart home device, a computing device, a vehicle-mounted device, etc., with wireless connection function. For example, netbooks, tablet computers, smart watches, ultra-mobile personal computers (UMPC), smart cameras, netbooks, personal digital assistants (PDAs), portable multimedia players (PMPs) ), AR (augmented reality)/VR (virtual reality) devices, wireless devices on aircraft, wireless devices on robots, wireless devices in industrial control, wireless devices in telemedicine, wireless devices in smart grids, smart cities Wireless devices in the (smart city), wireless devices in the smart home (smart home), etc. Or the UE may also be a wireless device in narrowband (narrowband, NB) technology.

The UE in this application can also refer to an access terminal, a user unit, a user station, a mobile station, a mobile station, a relay station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, and a wireless communication device , User agent or user device. The terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile network (PLMN) For terminal equipment or terminal equipment in the future Internet of Vehicles, etc., the specific type and structure of the UE are not limited in this application.

In addition, in this application, UE can also be a terminal device in the IoT system. IoT is an important part of the development of information technology in the future. Its main technical feature is to connect objects to the network through communication technology to achieve human-machine interconnection. An intelligent network of interconnected things. The IoT technology can achieve massive connections, deep coverage, and power-saving terminals through, for example, narrowband (NB) technology.

Please refer to FIG. 3, which shows a schematic diagram of the hardware structure of a UE. As shown in Fig. 3, the UE 300 may specifically include: a processor 301, a radio frequency circuit 302, a memory 303, a touch screen 304, a Bluetooth device 305, one or more sensors 306, a Wi-Fi device 307, a positioning device 308, and an audio circuit 309 , Peripheral interface 310, power supply device 311, fingerprint acquisition device 312, speaker 313, microphone 314 and other components. These components can communicate through one or more communication buses or signal lines (not shown in Figure 3). Those skilled in the art can understand that the hardware structure shown in FIG. 3 does not constitute a limitation on the UE 300, and the UE 300 may include more or less components than those shown in the figure, or combine certain components, or different component arrangements. .

The following describes each component of UE 300 in detail with reference to Figure 3:

The processor 301 is the control center of the UE 300. It uses various interfaces and lines to connect to the various parts of the UE 300. It runs or executes the application client program (hereinafter referred to as App) stored in the memory 303, and calls the application stored in the memory 303. The data inside performs various functions of the UE 300 and processes data. In some embodiments, the processor 301 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more for control For the integrated circuit executed by the program program of the present application, the processor 301 may include one or more CPUs; for example, the processor 301 may be a Kirin 260 chip.

The radio frequency circuit 302 can be used to receive and send wireless signals during the process of sending and receiving information or talking. In particular, the radio frequency circuit 302 may receive the downlink data of the base station and send it to the processor 301 for processing; in addition, it may send the uplink data to the base station. Generally, the radio frequency circuit includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency circuit 302 can also communicate with other devices through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to Global System for Mobile Communications, General Packet Radio Service, Code Division Multiple Access, Wideband Code Division Multiple Access, Long Term Evolution, Email, Short Message Service, etc.

The memory 303 is used to store application programs and data. The memory 303 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions. Random access memory (RAM) ) Or other types of dynamic storage devices that can store information and instructions. They can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory, CD -ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store instructions or data structures The form of the desired program code and any other medium that can be accessed by the computer, but not limited to this. The processor 301 executes various functions and data processing of the UE 300 by running application programs and data stored in the memory 303. The memory 303 mainly includes a storage program area and a storage data area. The storage program area can store the operating system and at least one application program required by at least one function (such as sound playback function, image playback function, etc.); the storage data area can store Data created at 300 hours (such as audio data, phone book, etc.). The memory 303 may store instructions for implementing two modular functions: receiving instructions and connection instructions, and the processor 301 controls the execution. The processor 301 is configured to execute computer-executable instructions stored in the memory 303, so as to implement the method provided in the following embodiments of the present application. In addition, the memory 303 may include a high-speed random access memory, and may also include a non-volatile memory, such as a magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices. The memory 303 can store various operating systems, for example, an iOS operating system, an Android operating system, and so on.

The UE 300 may also include at least one or more sensors 306, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display of the touch screen 304 according to the brightness of the ambient light, and the proximity sensor can turn off the power of the display when the UE 300 is moved to the ear. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when it is stationary. Related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, percussion), etc.; as for the UE 300 can also be equipped with gyroscope, barometer, hygrometer, thermometer, infrared sensor and other sensors, here No longer.

The audio circuit 309, the speaker 313, and the microphone 314 can provide an audio interface between the user and the UE 300. The audio circuit 309 can transmit the electrical signal converted from the received audio data to the speaker 313, which is converted into a sound signal for output by the speaker 313; on the other hand, the microphone 314 converts the collected sound signal into an electrical signal, and the audio circuit 309 After being received, it is converted into audio data, and then the audio data is output to the radio frequency circuit 302 to be sent to, for example, another UE, or the audio data is output to the memory 303 for further processing.

Although not shown in FIG. 3, the UE 300 may also include a camera (front camera and/or rear camera), a flashlight, a miniature projection device, a near field communication (NFC) device, etc., which will not be repeated here.

It should be understood that the hardware modules included in the UE shown in FIG. 3 are only described as examples and do not limit the application. In fact, the UE shown in FIG. 3 may also include other hardware modules that interact with the hardware modules illustrated in the figure. For other hardware modules, there is no specific limitation here.

The AN/RAN in this application may be the base station shown in FIG. 2. Specifically, the base station may be an Ng-eNB, a gNB, or a transmission/reception point (trasmission/reception point, TRP). It may also be a base station defined by the 3rd generation partnership project (3GPP). For example, eNB or e-NodeB, etc.

In addition, when the eNB accesses the NR core network or next generation core network (NGC) or 5G core network (5th generation core network, 5GC), the eNB may also be referred to as eLTE eNB. Specifically, the eLTE eNB is an evolved LTE base station equipment based on the eNB, and can be directly connected to the 5G CN. The eLTE eNB also belongs to the base station equipment in the NR.

Alternatively, AN/RAN may also be a wireless terminal (WT). For example, an access point (access point, AP) or an access controller (access controller, AC), or other network equipment that has the ability to communicate with the UE and the core network. For example, relay equipment, in-vehicle equipment, smart wearable equipment, etc. This application does not limit the type of AN/RAN.

Please refer to FIG. 4, which shows a schematic diagram of a hardware result of a network device. As shown in FIG. 4, the network device may include a processor 401, a communication line 402, a memory 403, and at least one communication interface (in FIG. 4, the communication interface 404 is included as an example for illustration).

The processor 401 can be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs used to control the execution of the program of this application. integrated circuit.

The communication line 402 may include a path to transmit information between the aforementioned components.

The communication interface 404 uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, RAN, and WLAN.

The memory 403 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions The dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this. The memory can exist independently and is connected to the processor through the communication line 402. The memory can also be integrated with the processor.

Among them, the memory 403 is used to store computer execution instructions for executing the solution of the present application. The memory 403 can store instructions for implementing two modular functions: sending instructions, receiving instructions, and processing instructions, and the processor 401 controls the execution. . The processor 401 is configured to execute computer-executable instructions stored in the memory 403, so as to implement the method provided in the following embodiments of the present application. The memory 403 shown in FIG. 4 is only a schematic diagram, and the memory may also include other functional instructions, which is not limited by the present invention.

Optionally, the computer-executable instructions in this application may also be referred to as application program code, which is not specifically limited in this application.

In a specific implementation, as an embodiment, the processor 401 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3.

It should be noted that FIG. 4 is only used as an example of a network device, and does not limit the specific structure of the network device. For example, the network device may also include other functional modules. In addition, for the access network equipment (e.g., access network equipment, etc.) and core network equipment (e.g., AMF, PCF, NRF, SMF, UPF, etc.) in this application, both may have the same or similar Hardware structure.

For ease of understanding, the concepts and terms that may appear in this application are explained below.

1. Connected state: also called connected state. The connection state refers to the establishment of a radio resource control (radio resource control, RRC) connection, so it is also called RRC_CONNECTED. When the UE is in the connected state, the connection between the UE and the access network (such as a base station) and the core network (such as AMF) are established. If there is data to be transmitted, it can be completed directly through the established connection. Among them, the RRC connection is used to process control plane messages between the UE and the access network.

2. Inactive state: also called inactive state (RRC_INACTIVE) or third state. The deactivated state means that the RRC connection between the UE and the access network (such as the base station) has been disconnected, but the connection between the UE's access network (such as the base station) and the core network (such as AMF) has not been disconnected. When the UE is in the deactivated state, if there is data to be transmitted, the RRC connection between the UE and the access network (such as a base station) needs to be restored before data transmission can be performed.

3. Idle state: also called idle state (RRC_IDLE). The idle state means that the RRC connection between the UE and the access network (such as the base station) is not established, and the connection between the UE's access network (such as the base station) and the core network (such as AMF) is not established. When the UE is in an idle state, if there is data to be transmitted, the connection between the UE and the access network (such as the base station) and the connection between the UE's access network (such as the base station) and the core network (such as AMF) need to be established first. Data transmission can only be carried out if connected.

4. Tracking area (TA): TA is a core network level (core network level, CN level) location area, used for LTE/SAE and other systems to manage the location of the UE. Specifically, the TA can be used for the paging management and location update management of the UE by the core network equipment. The UE can notify the core network device of the TA where the UE is located through TA registration, so that when the core network device needs to page the UE, it can page the UE according to the TA registered by the UE.

Among them, TA is a cell-level configuration. Multiple cells can be configured with the same TA, but a cell can only belong to one TA at a time.

5. RAN-based notification area (RNA) based on the access network: RNA is similar to TA and is used for paging management and location update management of the UE by network equipment. The difference is that RNA is a RAN-level location area. The last serving base station before the UE enters the deactivated state will indicate an RNA to the UE through dedicated RRC signaling "RRC release". When the UE moves within the range of the RNA, RNA update (RNAU) is not required. If the UE is out of the RNA range, RNAU will be initiated.

In addition, if the UE experiences abnormal events such as sudden power failure, entering no coverage area, and no action and no messages for a long time, the base station side will still save entities (such as packet data convergence protocol (PDCP) and service) for the UE. Data adaptation protocol (service data adaptation protocol, SDAP)), which will cause the base station side resources to hang. To prevent this, the UE will periodically notify the base station of "I am still there", that is, the periodic RNAU process.

It can be understood that the air interface protocol stack is generally divided into three layers: the physical layer (also referred to as the L1 layer), the data link layer (also referred to as the L2 layer), and the network layer (also referred to as the L3 layer). The L2 layer (ie, the data link layer) can be divided into the following sublayers: medium access control (MAC) layer, radio link control (RLC) layer, PDCP layer and SDAP layer. Among them, the MAC layer is used to provide logical channels to the RLC layer and to map logical channels to physical channels. The RLC layer is used to provide RLC channels to the PDCP layer and to map the RLC channels and logical channels. The PDCP layer is used to provide RBs to the SDAP layer, and perform radio bearer (RB) mapping with RLC channels. The RB includes a signaling radio bearer (SRB) on the control plane and a data radio bearer (DBR) on the user plane. The SDAP layer is used to provide specific quality of service (QoS) parameters of data packets, and to map QoS parameters to RBs. The QoS parameter is used to indicate one or more of the resource type, priority, delay, packet loss rate, or time window size required for data packet transmission.

In some possible structures, the AN/RAN may be composed of a centralized unit (CU) and a distributed unit (DU). Among them, the CU may also be referred to as a control unit (control unit). Through the structure of CU-DU, the AN/RAN protocol layer can be separated, and part of the protocol layer functions are placed under the centralized control of the CU, and the remaining part or all of the protocol layer functions are distributed in the DU, and the CU centrally controls the DU. For example, the RRC, SDAP, and PDCP layers can be deployed in the CU; the remaining RLC layer, MAC layer, and physical layer (Physical) can be deployed in the DU. The CU and DU are connected through the F1 interface. CU stands for gNB to connect to the core network through the NG interface.

Optionally, the CU may also adopt a structure in which a control plane (control plane) entity and a user plane (UP) network element are separated, and one control plane network element manages multiple user plane network elements.

Please refer to FIG. 5, which shows the structure diagram of the protocol stack reserved on the base station side when the UE is in a connected state, a deactivated state, and an idle state. As shown in Figure 5, when the UE is in the connected state, F1 tunnels (F1 tunnels) are established between DU1 and DU2 and the CU respectively. UE4) N3 tunnel for data transmission. When the UE is in the deactivated state, the N3 tunnel between the CU and the core network is still reserved, and the SDAP and PDCP entities of the UE are also reserved. But the air interface data radio bearer (DBR) is released. Among them, the cell where the UE camps when it enters the deactivated state is called an anchor cell. When the UE moves within the RNA area configured for the UE by the last serving base station before the UE enters the deactivation state, the anchor cell remains unchanged and does not need to notify the network; when the UE moves out of the RNA range, the network needs to be notified to replace the anchor cell and replace the RNA . When the UE is in an idle state, the N3 tunnel between the CU and the core network is released, and the SDAP and PDCP entities of the UE are also released.

Correspondingly, when the UE enters the connected state from the deactivated state, the access network equipment (such as the base station) needs to first establish/restore the RRC connection, then establish the RLC entity for the DRB in the DU, and establish the F1 tunnel for the DRB between the CU-DUs , And then the UE can use DRB to transmit data.

The following will take the communication network architecture diagram shown in Figure 1 as an example. More specifically, the network slicing service architecture diagram shown in Figure 2 will be taken as an example. The access network device is a base station and has the structure shown in Figure 3 or The UE300 with a similar structure is taken as an example, and the solution provided in the embodiment of the present application is introduced.

Please refer to FIG. 6, which shows an interaction diagram of a data transmission method for network slicing. As shown in FIG. 6, the data transmission method for network slicing provided by the embodiment of the present application may include the following steps S601 and S602:

S601. Base station A sends RNA indication information to UE 300 before UE 300 enters the deactivated state. The RNA indication information is used to indicate the capability of one or more cells to support NSSAI services.

Wherein, the ability of each cell in the RNA list to support the NSSAI service includes at least: whether each cell in the RNA list supports the NSSAI service, and the type of NSSAI service supported by each cell in the RNA list. Alternatively, the ability of each cell in the RNA list to support the NSSAI service includes at least: the indication information that each cell in the RNA list supports the NSSAI service. Alternatively, the capability of each cell in the RNA list to support the NSSAI service includes at least: the indication information that each cell in the RNA list supports one or more types of NSSAI services.

That is to say, in the embodiment of the present application, before the UE 300 enters the deactivated state, all the cells in the RNA list sent to the UE 300 of the base station A (ie, the first access network device) may support the NSSAI service. Or all support one or more types of NSSAI services, as shown in Figure 7 (a) and Figure 7 (b). Or, in order to avoid the above solution due to the fact that most of the cells near base station A do not support NSSAI services, base station A sends too few cells in the RNA list to UE 300 before UE 300 enters the deactivated state. Before UE 300 enters the deactivated state, among the cells in the RNA list sent to UE 300, some cells may support NSSAI services or support one or more types of NSSAI services, and some cells may not support NSSAI services. (Such as small data services) or does not support one or more types of NSSAI services, as shown in Figure 8 (a), Figure 8 (b) and Figure 8 (c).

Among them, in the embodiments of the present application, a small data service refers to a service that has a small amount of data and is initiated infrequently. For example, the small data service can be any of the following services of a smart phone: traffic services from instant messaging (IM) service applications (such as whatsapp, QQ, WeChat, etc.), from IM/email or other applications Heartbeat/keep alive traffic business or push notifications from various applications, etc. Alternatively, the small data service can also be any of the following services of non-smart phones: traffic services from wearable devices (such as periodic positioning information, etc.), sensor services (such as industrial wireless sensor networks regularly or in an event-triggered manner) Transmit temperature, pressure readings, etc.) or smart meter and smart meter network to send regular meter reading services. Alternatively, the small data service may also be another service, which is not specifically limited in the embodiment of the present application.

In a possible implementation manner, the foregoing step S601 may include: base station A (ie, the first access network device) sends RNA indication information to UE 300 through an RRC release message before UE 300 enters the deactivated state. Among them, the RRC release message includes an RNA list including one or more cells. For example, the RRC release message includes identification information of one or more cells. The RNA indication information includes the ability of each cell in the RNA list to support NSSAI services.

Please refer to FIG. 9, which shows an example diagram of RNA indication information provided by an embodiment of the present application. As shown in Figure 9, the RNA indication information includes PLMN-RAN-AreaCellList used to characterize the RNA list and bit string indicator bytes used to indicate the capability of one or more cells in the RNA list to support NSSAI services: support requested NSSAI or not . Wherein, the PLMN-RAN-AreaCellList includes identification information of one or more cells, such as plmn-Identity as shown in FIG. 9. The length of the bit string is the number of cells in the PLMN-RAN-AreaCellList (that is, the RNA list). The content of the bit string is a string of 0 or 1, and the bit string in the content of the bit string is used to indicate whether the first cell to the last cell in the PLMN-RAN-AreaCellList (that is, the RNA list) supports the NSSAI service. For example, if a cell supports the NSSAI service, the corresponding bit in the bit string content is 1; if a cell does not support the NSSAI service, the corresponding bit in the bit string content is 0. Or, if a cell supports the NSSAI service, the corresponding bit in the bit string content is 0; if a cell does not support the NSSAI service, the corresponding bit in the bit string content is 1.

Alternatively, please refer to FIG. 10, which shows another example diagram of RNA indication information provided by an embodiment of the present application. As shown in Figure 10, the RNA indication information includes PLMN-RAN-AreaConfigList used to characterize the RNA list and bit string indicator bytes used to indicate the capability of one or more cells in the RNA list to support NSSAI services: support requested NSSAI or not . Among them, each RAN Area in the PLMN-RAN-AreaConfigList is composed of some or all TAs. All TAs are TAC identifiers, and some TAs are RANAC (RAN area codes) identifiers. Therefore, PLMN-RAN-AreaConfigList essentially includes an RNA list of one or more cells. Similarly, the length of the bit string is the number of cells in the PLMN-RAN-AreaConfigList (that is, the RNA list). The content of the bit string is a string of 0 or 1, and the bit string in the content of the bit string is used to indicate whether the first cell to the last cell in the PLMN-RAN-AreaConfigList (that is, the RNA list) supports the NSSAI service.

In the embodiment of the present application, the base station A (that is, the first access network device) can determine the RNA indication information in at least the following three ways:

Manner 1: The base station A (ie, the first access network device) determines the slice support capability information of at least one cell obtained from the core network element (such as AMF).

Among them, the capability information of at least one cell to support slices can be understood as the capability information of at least one cell to support the NSSAI service type. Specifically, base station A may obtain the slice support capability of each cell near base station A from a core network element (such as AMF), and base station A may determine the RNA indication information according to the response of the core network element. Or, further, the base station A may also determine the RNA list according to the reply of the core network element. For example, base station A regards the cell supporting slice A returned by the core network element as the cell in the RNA list. Or, as an optional implementation manner, the base station A may screen out a part of the cells that support slice A as the cells in the RNA list according to the response of the core network element.

Alternatively, the base station A may also screen out a part of the cells (for example, further screen based on distance) from the replies of the core network element, so as to determine the RNA indication information. Or, further, use a part of the cells after screening as cells in the RNA list.

Manner 2: The base station A (that is, the first access network device) determines the slice-supporting cell near the base station A obtained from the core network element (such as AMF).

Specifically, base station A may obtain which cells near base station A support slice A from a core network element (such as AMF), and base station A may determine the RNA indication information according to the response of the core network element. Or, further, the base station A may also determine the RNA list according to the reply of the core network element.

Among them, in the

above methods

1 and 2, the base station A can actively ask the core network element (such as AMF) about the ability of each cell near the base station A to support slices or which cells near the base station A support slices; or, the core network element (Such as AMF) can also actively provide base station A with the ability of each cell near base station A to support slices or which cells near base station A support slices. The embodiment of the present application does not limit the specific acquisition process.

Manner 3: The base station A (that is, the first access network device) determines the slice support capability information of at least one cell obtained from at least one access network device. Wherein, the distance between the at least one access network device and the base station A (that is, the first access network device) is within a preset range.

Specifically, base station A can obtain the ability of the cell of the opposing base station to support slices from one or more base stations (such as one or more base stations near base station A) through the Xn interface, or the cells of the opposing base station's cells that support slices.

The base station A may determine the RNA indication information according to the reply information received from the above-mentioned one or more base stations. Or, further, the base station A may also determine the RNA list based on the reply information received from the above-mentioned one or more base stations.

Alternatively, base station A may also screen out a part of the cells (for example, further screening based on distance) from the replies of one or more base stations, so as to determine the RNA indication information. Or, further, use a part of the cells after screening as cells in the RNA list.

Further, in mode 3, when the NSSAI service capability of each cell in any of the cells under its jurisdiction changes, each base station is updated to nearby base stations (including base station A) through the Xn interface.

If UE 300 has NSSAI service transmission requirements, as shown in Figure 6, UE 300, base station A or base station B continue to perform the following steps S602-S605:

S602. The UE 300 sends an RRC connection establishment request to base station A (or base station B) through the first cell.

More specifically, if the UE 300 has an NSSAI service transmission requirement in the deactivated state, the UE 300 sends an RRC connection establishment request to the base station A (or base station B) through the first cell. It is used to enter the connected state from the deactivated state to transmit the service data of the NSSAI service of the UE 300 through the first cell.

Among them, UE 300 has NSSAI service transmission requirements in the deactivated state, including but not limited to the following two possibilities: (1) UE 300 has NSSAI service transmission requirements in deactivated state; (2) UE 300 receives a paging request . Specifically, if service data of the downlink NSSAI service arrives at the anchor cell of the UE 300, base station A will initiate a paging request to all base stations in the RNA list. All cells in the RNA list send paging messages on the air interface, indicating that the current service is an NSSAI service. After receiving the paging message, the UE 300 will send an RRC connection establishment request to the base station A (or base station B) through the first cell.

The first cell is one of the one or more cells indicated by the RNA indication information, and the first cell is a cell supporting the NSSAI service.

In the embodiment of the present application, the NSSAI service may at least include: a first type of NSSAI service and/or a second type of NSSAI service. Among them, the NSSAI service of the first service type may be the NSSAI service type processed before the UE 300 enters the activated state from the activated state, and is also called “suspended service”. For example, the NSSAI service of the first service type is the most processed NSSAI service type within a preset time period (such as a week) before the UE 300 enters the activated state from the activated state. For another example, the NSSAI service of the first service type is the last NSSAI service type processed before the UE 300 enters the deactivated state from the activated state. The second type of NSSAI service may be a type of NSSAI service that the UE 300 has not processed but needs to be processed before entering the activated state from the activated state, and is also called "potential service". For example, the second type of NSSAI service is a type of NSSAI service predetermined by the UE 300 (for example, a service that needs to be performed at a preset time). The embodiment of the present application does not specifically limit the specific NSSAI service included in the NSSAI service. In addition, the embodiments of the present application do not limit the application categories described in the NSSAI service. For example, the NSSAI business can be the NSSAI business of social applications, and it can also be the NSSAI business of other types of applications such as news, office, shopping, and travel.

In the embodiment of this application, if the first cell is the cell to which base station A belongs, as shown in S602-a in Figure 6, if UE 300 has NSSAI service transmission requirements, UE 300 sends RRC to base station A through the first cell Connection establishment request. If the first cell is the cell to which base station B belongs, as shown in S602-b in FIG. 6, if UE 300 has an NSSAI service transmission requirement, UE 300 sends an RRC connection establishment request to base station B through the first cell.

In a possible situation, the first cell is the cell where the UE 300 resides when there is the aforementioned NSSAI service transmission demand in the deactivated state. In this case, when the UE 300 has an NSSAI service transmission requirement, it will determine the ability of the first cell to support the NSSAI service according to the RNA indication information received from the base station A. For example, the UE 300 reads ran-AreaCells and Support requested NSSAI or not in the RRC release message to determine whether the first cell supports the NSSAI service. As described above, if the first cell supports the NSSAI service, the UE 300 will directly send the RRC connection establishment request to the base station (base station A or base station B) to which the first cell belongs through the first cell. The service data of the NSSAI service of the UE 300 is transmitted through the first cell and the base station (base station A or base station B) to which the first cell belongs respectively.

In another possible situation, the cell where the UE 300 resides when the above-mentioned NSSAI service transmission needs in the deactivated state is the second cell, and the second cell is one of the one or more cells indicated by the RNA indication information. And the second cell does not support NSSAI services. Since the UE 300 has an NSSAI service transmission requirement, it will determine the ability of the second cell to support the NSSAI service according to the RNA indication information received from the base station A. For example, the UE 300 determines that the second cell does not support NSSAI services by reading ran-AreaCells and Support requested NSSAI or not in the RRC release message. In this case, the UE 300 will select a cell (such as the first cell) that supports the NSSAI service according to the RNA indication information. For example, the UE 300 determines that the first cell supports the NSSAI service by reading ran-AreaCells and Support requested NSSAI or not. Then, by accessing the first cell, the UE 300 sends an RRC connection establishment request to the base station (base station A or base station B) to which the first cell belongs through the first cell. After entering the connected state from the deactivated state, the service data of the NSSAI service of the UE 300 is transmitted through the second cell and the base station to which the second cell belongs (base station A or base station B).

It should be noted that the embodiment of the present application does not limit the specific rule for the UE 300 to select a cell (such as the first cell) that supports the NSSAI service from one or more cells indicated by the RNA indication information. For example, the UE 300 may select a cell with the best signal strength and/or signal quality from one or more cells indicated by the RNA indication information. For another example, the UE 300 may select a cell with the coverage area closest to the UE 300 from one or more cells indicated by the RNA indication information.

In the embodiment of this application, the first cell has the following two situations: (1) The first cell is not the anchor cell of the UE 300, as shown in Figure 7 (b) and Figure 8 (b) Or as shown in (c) in Figure 8. (2) The first cell is the anchor cell of the UE 300, that is, the first cell is the cell where the UE 300 resides when the UE 300 enters the deactivated state from the connected state, as shown in Figure 7 (a) or Figure 8 As shown in (a). For the above two cases, if the first cell supports the NSSAI service, the UE 300 can complete the above NSSAI service through the first cell.

It should be noted that if the first cell is the anchor cell of the UE 300, and the first cell supports NSSAI services (as shown in Figure 7 (a) or Figure 8 (a)), The anchor cell retains the context information of the UE 300. Therefore, in this case, the UE 300 sends an RR connection establishment request to the base station to which the first cell belongs (ie, base station A). The cell is used to request the restoration of the UE 300 The RRC connection with base station A is also called "RRC" connection recovery request message.

It should be noted that Figures 7 and 8 are only examples of several UE 300 accessing the core network through the cells in the RNA list, and do not apply to the cell where the UE 300 resides when it has the above NSSAI service transmission requirements in the deactivated state. Out of limits. Taking (a) in Figure 7 as an example, the UE 300 may currently reside in the anchor cell. However, there is also such a possibility that the UE 300 currently resides in cell A or cell B. When the UE 300 has the above-mentioned NSSAI service transmission requirements, the measurement finds that the signal strength and/or signal quality of the anchor cell is better, so it accesses anchor cell. Taking (b) in FIG. 7 as an example, UE 300 may currently camp on the first cell. However, there is also such a possibility that UE 300 currently resides in cell A or anchor cell. When UE 300 has the above NSSAI service transmission requirements, it measures and finds that the signal strength and/or signal quality of the first cell is better, so the connection Into the first cell. Taking (a) in FIG. 8 as an example, the UE 300 may currently camp on the first cell (that is, the anchor cell). However, there is also such a possibility that the UE 300 is currently camping on cell A. When the UE 300 has the above-mentioned NSSAI service transmission requirements, the measurement finds that the signal strength and/or signal quality of the first cell (that is, the anchor cell) is better. Therefore, access to the first cell (ie anchor cell). Or, the UE 300 currently resides in cell B, and the UE 300 finds that cell B does not support NSSAI services when it has the aforementioned NSSAI service transmission requirements, and the first cell (that is, the anchor cell) supports NSSAI services, so it accesses the first cell ( That is anchor cell). Taking (b) in Figure 8 as an example, UE 300 may currently camp on the first cell. However, there is also a possibility that the UE 300 is currently camping on cell A. When the UE 300 has the above-mentioned NSSAI service transmission requirements, the measurement finds that the signal strength and/or signal quality of the first cell is better, so it accesses the first cell. Community. Alternatively, the UE 300 currently resides in the B cell (ie anchor cell), and when the UE 300 has the aforementioned NSSAI service transmission requirement, it finds that the B cell does not support the NSSAI service, and the first cell supports the NSSAI service, so it accesses the first cell. Taking (c) in FIG. 8 as an example, the UE 300 may currently camp on the first cell. However, there is also a possibility that the UE 300 is currently camping on the anchor cell. When the UE 300 has the above NSSAI service transmission requirements, it measures and finds that the signal strength and/or signal quality of the first cell is better, so it accesses the first cell. Community. Or, the UE 300 currently resides in cell B, and the UE 300 finds that cell B does not support NSSAI services and the first cell supports NSSAI services when it has the aforementioned NSSAI service transmission requirements, so it accesses the first cell.

In some embodiments, the RRC connection establishment request message sent by the UE 300 is also used to instruct the base station to which the first cell belongs to request the core network device (such as the AMF unit) to transfer the transmission channel used to transmit the service data of the NSSAI service from the UE 300 The anchor base station (such as base station A, that is, the first access network device) is handed over to the base station to which the first cell belongs (such as base station B, that is, the second access network device). Among them, the transmission channel used to transmit the service data of the NSSAI service is usually established between the UPF unit and the access network device (such as base station A).

In some embodiments, the RRC connection establishment request message sent by the UE 300 may also include: indication information of the service transmission requirements of the UE 300. The indication information of the service transmission requirement of the UE 300 is used to indicate whether the service data to be transmitted by the UE 300 is the service data of the NSSAI service or the service data of the non-NSSAI service. In this way, the base station to which the first cell belongs can decide whether to migrate the transmission channel corresponding to the NSSAI service or the transmission channel corresponding to the non-NSSAI service according to the service data to be transmitted by the UE 300 and the cell where the UE 300 resides.

Further, in some embodiments, although the UE 300 does not need to use the transmission channel corresponding to non-NSSAI services (such as small data services) when there is a need for NSSAI service transmission, in order to ensure the stability of the network, usually the first cell belongs to The base station of the UE will also request the core network equipment to switch the transmission channel corresponding to the non-NSSAI service (such as the small data service) from the anchor base station of the UE 300 to the base station to which the first cell belongs.

S603. The base station A (base station B) establishes an RRC connection between the UE 300 and the base station A (base station b) according to the RRC connection establishment request from the UE 300.

Specifically, if the UE 300 executes the above step S602-a, that is, the first cell is a cell under the jurisdiction of the base station A, the UE 300 sends an RRC connection establishment request to the base station A. Then the base station A performs step S603-a, and establishes an RRC connection with the UE 300 according to the RRC connection establishment request from the UE 300. If the UE 300 executes the above step S602-b, that is, the first cell is a cell under the jurisdiction of the base station B, and the UE 300 sends an RRC connection establishment request to the base station B. Then the base station B performs step S603-b, and establishes an RRC connection with the UE 300 according to the RRC connection establishment request from the UE 300. Wherein, if the UE 300 sends an RRC connection recovery request message to the base station A through an anchor cell, the base station A resumes the RRC connection between the UE 300 and the base station A. Regarding the RRC connection establishment/recovery process, you can refer to the explanation and description in the conventional technology, which will not be repeated here.

S604. The base station A establishes an RLC entity for the DRB in the DU, and establishes an F1 tunnel for the DRB between the CU and the DU.

Specifically, if the UE 300 executes the foregoing step S602-a, and the base station A executes the foregoing step S603-a, that is, the first cell is a cell under the jurisdiction of the base station A. Then the base station A performs step S603-a, and establishes an RLC entity for the DRB in the DU according to the RRC connection establishment request from the UE 300, and establishes an F1 tunnel for the DRB between the CU-DU. This causes the UE 300 to switch from the connection state in (b) in FIG. 5 to the connection state shown in (a) in FIG. 5. If the UE 300 performs the foregoing step S602-b, and the base station B performs the foregoing step S603-b, that is, the first cell is a cell under the jurisdiction of the base station B. Then the base station B performs step S603-b, and establishes an RLC entity for the DRB in the DU according to the RRC connection establishment request from the UE 300, and establishes an F1 tunnel for the DRB between the CU-DU. This causes the UE 300 to switch from the connection state in (b) in FIG. 5 to the connection state shown in (a) in FIG. 5. Regarding the process of establishing the RLC entity for the DRB in the DU and establishing the F1 tunnel for the DRB between the CU-DUs, please refer to the explanation and description in the conventional technology, which will not be repeated here.

S605. The UE 300 transmits service data of the NSSAI service through the first cell.

Specifically, if the UE 300 performs the foregoing step S602-a, and the base station A performs the foregoing steps S603-a and S604-a, that is, the first cell is a cell under the jurisdiction of the base station A. Then the UE 300 executes step S605-a to transmit the service data of the NSSAI service through the first cell. More specifically, the UE 300 separately establishes the RLC entity for the DRB in the DU of the base station A through the base station A, the F1 tunnel established for the DRB between the CU-DUs, the SDAP and PDCP entities in the CU, and the CU and the core network. The N3 tunnel between NSSAI services transmits business data of NSSAI services. If the UE 300 performs the foregoing step S602-b, and the base station B performs the foregoing steps S603-b and S604-b, that is, the first cell is a cell under the jurisdiction of the base station B. Then the UE 300 executes step S605-b to transmit the service data of the NSSAI service through the first cell. More specifically, the UE 300 separately establishes the RLC entity for the DRB in the DU of the base station B through the base station B, the F1 tunnel established for the DRB between the CU-DUs, the SDAP and PDCP entities in the CU, and the CU and the core network. The N3 tunnel between NSSAI services transmits business data of NSSAI services.

It can be understood that the above steps S602-S605 are for the data transmission method when the UE 300 has an NSSAI service transmission requirement. In some embodiments. If the UE 300 has a non-NSSAI service (such as small data service) transmission demand after performing the above step S601, it is assumed that the UE 300 resides at base station A (ie, the anchor base station of the UE 300) when the non-NSSAI service transmission demand is required. As shown in Figure 11, UE 300 and base station A continue to perform the following steps S1101-S1104:

S1101, UE 300 sends an RRC connection establishment request to base station A.

More specifically, the RRC connection establishment request is used to request the base station A to resume the RRC connection with the UE 300, so that the UE 300 enters the connected state from the deactivated state, so as to transmit the service data of the non-NSSAI service of the UE 300 through the base station A.

Among them, the UE 300 can reside in a cell that supports NSSAI services (such as the first cell) when it has the above-mentioned non-NSSAI service transmission requirements, or can reside in a cell that does not support NSSAI services (such as the second cell). This application is implemented The example does not limit this.

In the embodiment of this application, the UE 300 has a non-NSSAI service transmission requirement in the deactivated state, including but not limited to the following two possibilities: (1) The UE 300 has a non-NSSAI service transmission requirement in the deactivated state; (2) The UE 300 receives the paging request. Specifically, if service data of a downlink non-NSSAI service arrives at the anchor cell of the UE 300, base station A will initiate a paging request to all base stations in the RNA list.

In some embodiments, the RRC connection establishment request message sent by the UE 300 may also include: indication information of the service transmission requirements of the UE 300. The indication information of the service transmission requirement of the UE 300 is used to indicate that the service data to be transmitted by the UE 300 is service data of a non-NSSAI service. So that the base station B decides whether to migrate the transmission channel corresponding to the non-NSSAI service according to the service data to be transmitted by the UE 300.

S1102. The base station A establishes an RRC connection between the UE 300 and the base station A according to the RRC connection establishment request from the UE 300.

More specifically, since the base station A is the anchor base station of the UE, the base station A saves the context information of the UE 300. The base station A can obtain the context information of the UE 300, and restore the RRC connection with the UE 300 according to the context information of the UE 300. Regarding the process of restoring the RRC connection by the base station according to the UE context saved by the base station, reference may be made to the introduction and description in the conventional technology, which will not be repeated here.

S1103. The base station A establishes an RLC entity for the DRB in the DU, and establishes an F1 tunnel for the DRB between the CU and the DU.

S1104, UE 300 transmits service data of non-NSSAI services through base station A.

In other embodiments. If the UE 300 has a non-NSSAI service (such as small data service) transmission demand after performing the above step S601, it is assumed that the UE 300 resides at the anchor base station (such as base station B) of the non-UE 300 when the above non-NSSAI service transmission demand is required. As shown in Figure 12, UE 300, base station A and base station B continue to perform the following steps S1201-S1208:

S1201, UE 300 sends an RRC connection establishment request to base station B.

In some embodiments, the RRC connection establishment request message sent by the UE 300 may also include: indication information of the service transmission requirements of the UE 300. The indication information of the service transmission requirement of the UE 300 is used to indicate that the service data to be transmitted by the UE 300 is service data of a non-NSSAI service. So that the base station B decides whether to migrate the transmission channel corresponding to the non-NSSAI service and the transmission channel corresponding to the NSSAI service according to the service data to be transmitted by the UE 300.

S1202, the base station B establishes an RRC connection between the UE 300 and the base station B according to the RRC connection establishment request message from the UE 300.

Specifically, base station B may send a request for obtaining UE 300 context information to the anchor base station (ie, base station A) through the Xn interface. The request may include the reason for RRC establishment is the transmission of service data of non-NSSAI services). After receiving the context information from the anchor base station (ie, base station A), base station B switches the context information of UE 300 to base station B.

S1203. The base station B sends a transmission channel relocation request to the AMF unit.

Wherein, the transmission channel migration request is used to request the transmission channel corresponding to the non-NSSAI service to be switched from the first access network device (ie base station A) to the second access network device (ie base station B). The transmission channel migration request can carry the tunnel ID of a non-NSSAI service (such as a small data service).

S1204. The AMF unit sends a transmission channel migration request message to the UPF unit.

The transmission channel migration request message is used to request the transmission channel corresponding to the non-NSSAI service to be switched from base station A to base station B.

S1205. The AMF unit receives a transmission channel migration confirmation message from the UPF unit.

S1206. The AMF unit sends a transmission channel migration confirmation message to base station B.

The channel migration confirmation message is used to confirm that the transmission channel corresponding to the non-NSSAI service is switched from base station A to base station B.

S1207: Base station B switches the transmission channel corresponding to the non-NSSAI service from base station A to base station B.

Specifically, as shown in FIG. 13, the N3 channel represented by the solid line is the transmission channel corresponding to the non-NSSAI service, and the N3 channel represented by the dashed line is the transmission channel corresponding to the NSSAI service. In this embodiment, base station B switches the transmission channel corresponding to the non-NSSAI service (that is, the N3 channel represented by the solid line) from base station A to base station B. The N3 channel indicated by the dashed line remains between base station A and UPF.

It can be understood that at this time, the transmission channel corresponding to the NSSAI service is still reserved between the base station A and the UPF. Since the transmission channel corresponding to the NSSAI service cannot exist separately between the base station and the UPF for a long time, in some embodiments, when the base station B switches the transmission channel corresponding to the non-NSSAI service from the base station A to the base station B, the AMF unit can be started A timer. When the timer exceeds the preset duration, no matter whether the transmission of the non-NSSAI service is completed or not, the base station A must delete the transmission channel corresponding to the NSSAI service between the base station A and the UPF to ensure the stability of the network. Or, when the timer does not exceed the preset duration and the transmission of the non-NSSAI service has been completed, base station B can migrate the transmission channel corresponding to the NSSAI service to between base station B and the UPF unit; or, base station B can transmit the corresponding transmission of the NSSAI service The channel and the transmission channel corresponding to the non-NSSAI service are migrated to the anchor base station of UE 300; or, base station B can migrate the transmission channel corresponding to the NSSAI service and the transmission channel corresponding to the non-NSSAI service to the base station of the cell with the best signal coverage. . The embodiment of the present application does not specifically limit the migration of the transmission channel corresponding to the NSSAI service and the transmission channel corresponding to the non-NSSAI service after the non-NSSAI service transmission is completed.

S1208, UE 300 transmits service data of non-NSSAI services through base station B.

Further, in some embodiments, in order to ensure the stability of the network, or for some NSSAI "pseudo services", in order to ensure the smooth transmission of such services, it is necessary to ensure that the channels corresponding to the NSSAI services and the channels corresponding to the non-NSSAI services The transmission channel migration request is also used to request that the transmission channel corresponding to the NSSAI service stored between the first access network device (ie base station A) and the UPF unit be switched from the first access network device (ie base station A) To the second access network device (ie base station B). In this case, the transmission channel migration request sent by the AMF unit to the UPF unit in step S1204 is also used to request the transmission channel corresponding to the NSSAI service stored between the base station A and the UPF unit to be switched from the base station A to the base station B. The transmission channel migration confirmation message received by the AMF unit from the UPF unit in step S1205 is used to confirm the switching of the transmission channel corresponding to the NSSAI service from base station A to base station B. In this case, as shown in Figure 14, in UE 300, base station A and base station B have performed the above steps S601, S1201-S1207, base station B can also perform the following step S1209, and after base station B has performed step S1209, The UE 300 continues to perform the above step S1208.

S1209: Base station B switches the transmission channel corresponding to the NSSAI service from base station A to base station B.

Specifically, as shown in FIG. 15, the N3 channel represented by the solid line is the transmission channel corresponding to the non-NSSAI service, and the N3 channel represented by the dashed line is the transmission channel corresponding to the NSSAI service. In this embodiment, base station B switches the transmission channel corresponding to non-NSSAI services (ie, the N3 channel represented by a solid line) and the transmission channel corresponding to NSSAI services (ie, the N3 channel represented by a dashed line) from base station A to base station B.

In some embodiments, in the UE 300, each network element such as base station A and base station B has performed the above steps S601-S605 shown in FIG. 6, or performed the above steps S601 and S1101-S1104 shown in FIG. 11, or performed After completing the above steps S601 and S1201-S1208 shown in Figure 12, or after performing the steps S601, S1201-S1207, S1209, and S1208 shown in Figure 14, the UE 300 can also send a measurement report to the base station where it resides. The measurement report The base station used for its camping decides whether to switch the UE 300 to another base station.

Based on the foregoing considerations, in some embodiments, the measurement report sent by the UE 300 to the base station where it resides may at least include the signal strength and/or signal quality of one or more cells. The base station where the UE 300 resides decides whether to switch the UE 300 to another base station. And, if it is decided to switch the UE 300 to another base station, which cell to switch the UE 300 to.

Alternatively, the UE 300 may also send indication information to the base station where it resides, for instructing the UE 300 to be handed over to the last anchor cell of the UE 300. The embodiment of the present application does not limit the handover strategy after the UE 300 performs the NSSAI service/non-NSSAI service transmission.

Please refer to Figure 16. Figure 16 takes the non-NSSAI service data transmission scenario shown in Figure 13 as an example. Take the UE 300 sending a measurement report to the base station where it resides as an example. Switch flow chart. As shown in FIG. 16, the data transmission method for network slicing provided by the embodiment of the present application may further include the following steps S1601-S1608:

S1601, UE 300 sends a measurement report to base station B.

Wherein, the measurement report may at least include the signal strength and/or signal quality of one or more cells. For example, the measurement report includes the signal strength and/or signal quality of all cells whose distance from the UE 300 is within a preset range.

S1602, the base station B determines to hand over the UE 300 to the base station C according to the measurement report.

S1603: The base station B sends a handover request message to the base station C.

Among them, the handover request message is used to request the UE 300 to be handed over from base station B to base station C.

S1604. The base station C sends a handover request message to the AMF unit.

Among them, the handover request message is used to request the UE 300 to be handed over from base station B to base station C, and to request the allocation of two tunnel IDs for UE 300 (including the ID used to identify the transmission channel used to transmit non-NSSAI services and the ID used to identify The ID of the transmission channel that transmits the NSSAI service).

S1605. The AMF unit sends a handover request message to the UPF unit.

S1606. The AMF unit receives the handover confirmation message from the UPF unit.

Among them, the handover confirmation message is used to determine the handover of the UE 300 from base station B to base station C, and to reply to the AMF unit with the UPF unit to allocate two tunnel IDs for the UE 300.

S1607. The AMF unit sends a handover confirmation message to the base station C.

S1608. The base station C allocates two tunnel IDs to the UE 300 according to the UPF unit, and migrates the transmission channel used to transmit NSSAI services and the transmission channel used to transmit non-NSSAI services from the base station B and the UPF unit to the base station C and the UPF unit. between.

It should be understood that the various solutions of the embodiments of the present application can be used in a reasonable combination, and the explanations or descriptions of various terms appearing in the embodiments can be referred to or explained in the various embodiments, which is not limited.

It should also be understood that, in the various embodiments of the present application, the size of the sequence number 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 be implemented in this application. The implementation process of the example constitutes any limitation.

It can be understood that, in order to implement the functions of any one of the foregoing embodiments, the UE or the access network device (such as the first access network device or the second access network device) includes hardware structures and/or corresponding hardware structures that perform each function. Software module. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The embodiments of the present application can divide the functional modules of the UE and network equipment (such as access network equipment, AMF unit or UPF unit) and other equipment. For example, each functional module can be divided corresponding to each function, or two or two The above functions are integrated in a processing module. The above-mentioned integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

For example, in the case of dividing various functional modules in an integrated manner, as shown in FIG. 17, a structural block diagram of a UE provided in an embodiment of this application. The UE 300 may include a transceiver unit 1710 and a processing unit 1720.

Among them, the transceiver unit 1710 is used to support the UE 300 to receive RNA indication information from the first access network device (such as base station A) before entering the deactivated state, and to support the UE 300 to perform the above step S602 (such as S602-a or S602-a). b), S603 (such as S603-a or S603-b), S605 (such as S605-a or S605-b), S1101, S1201, S1208, S1601, and/or other processes used in the techniques described herein. The processing unit 1720 is used to support the UE 300 to perform the above steps S1102 and S1202, and is used to support the UE 300 to determine the cell used to transmit the service data of the NSSAI service of the UE 300 according to the RNA indication information, or determine the cell used to transmit the non-NSSAI service of the UE 300 The cell of the business data, and/or other processes used in the techniques described herein.

As shown in FIG. 18, it is a structural block diagram of a network device provided by an embodiment of this application. The network device may be the aforementioned first access network device (such as base station A), the second access network device (such as base station B), the third access network device (such as base station C), an AMF unit, or a UPF unit. The network device may include a transceiver unit 1810 and a processing unit 1820.

Wherein, when the network device is the first access network device (such as base station A), the transceiver unit 1810 is configured to support the first access network device (such as base station A) to perform the above steps S601, S602-a, S605-a, S1104 , And/or other processes used in the techniques described herein. The processing unit 1820 is configured to support the first access network device (such as base station A) to perform the above steps S603-a, S604-a, S1103, S1203, S1206 and/or other processes used in the technology described herein. When the network device is a second access network device (such as base station B), the transceiver unit 1810 is used to support the second access network device (such as base station B) to perform the above steps S601, S602-b, S605-b, S1603, and / Or other processes used in the techniques described herein. The processing unit 1820 is configured to support the second access network device (such as base station B) to perform the above steps S603-b, S604-b, S1207, S1209, S1602, S1608, and/or other processes used in the technology described herein. When the network device is an AMF unit, the transceiver unit 1810 is used to support the AMF unit to perform the above steps S1203, S1204, S1205, S1206, S1604, S1605, S1606, S1607, and/or other processes used in the technology described herein. When the network device is a UPF unit, the transceiver unit 1810 is used to support the UPF unit to perform the above steps S1204, S1205, and/or other processes used in the technology described herein. When the network device is a third access network device (such as base station C), the transceiver unit 1810 is used to support the third access network device (such as base station C) to perform the above-mentioned steps S1603, S1604, and S1607, and/or used in this document Describe the other processes of the technology. The processing unit 1820 is configured to support the third access network device (such as the base station C) to perform the above step S1608, and/or other processes used in the technology described herein.

It should be noted that the above-mentioned transceiving unit 1710 and transceiving unit 1810 may include radio frequency circuits. Specifically, the UE or the access network device (such as the first access network device or the second access network device) may receive and send wireless signals through a radio frequency circuit. Generally, the radio frequency circuit includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency circuit can also communicate with other devices through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to Global System for Mobile Communications, General Packet Radio Service, Code Division Multiple Access, Wideband Code Division Multiple Access, Long Term Evolution, Email, Short Message Service, etc.

It should be understood that each module in the UE or the network device may be implemented in the form of software and/or hardware, which is not specifically limited. In other words, the UE or network equipment is presented in the form of functional modules. The "module" herein may refer to application-specific integrated circuits ASIC, circuits, processors and memories that execute one or more software or firmware programs, integrated logic circuits, and/or other devices that can provide the above-mentioned functions. Optionally, in a simple embodiment, those skilled in the art can imagine that the UE or network device may adopt the form shown in FIG. 19. The processing unit 1720 or the processing unit 1820 may be implemented by the processor 1910 shown in FIG. 19. The transceiver unit 1710 and the transceiver unit 1810 may be implemented by the transceiver 1920 shown in FIG. 19. Specifically, the processor is implemented by executing a computer program stored in the memory. Optionally, when the UE or the network device is a chip, the functions and/or implementation process of the transceiver unit 1710 and the transceiver unit 1810 may also be implemented by pins or circuits. Optionally, the UE or the network device may also include a storage unit, such as a register, a cache, etc., and the storage unit may also be a storage unit located outside the chip in the computer device, such as the memory 1930 shown in FIG. 19.

Fig. 19 shows a schematic structural diagram of a UE or a network device according to an embodiment of the present application. As shown in FIG. 13, the UE or network device includes: a processor 1910 and a transceiver 1920.

The transceiver 1920 can be used to support the UE 300 to receive RNA indication information from the first access network device (such as base station A) before entering the deactivated state, and to support the UE 300 to perform the above step S602 (such as S602-a or S602). -b), S603 (such as S603-a or S603-b), S605 (such as S605-a or S605-b), S1101, S1201, S1208, S1601, and/or other processes used in the techniques described herein. The processor 1910 may be used to support the UE to perform the above steps S1102 and S1202, to support the UE 300 to determine the cell used to transmit the service data of the NSSAI service of the UE 300 according to the RNA indication information, or to determine the cell used to transmit the non-NSSAI service of the UE 300 The cell of the business data, and/or other processes used in the techniques described herein.

When the network device is the first access network device (such as base station A), the transceiver 1920 may be used to support the first access network device (such as base station A) to perform the above steps S601, S602-a, S605-a, S1104, And/or other processes used in the techniques described herein. The processor 1910 may be used to support the first access network device (such as base station A) to perform the above steps S603-a, S604-a, S1103, S1203, S1206 and/or other processes used in the technology described herein. When the network device is the second access network device (such as base station B), the transceiver 1920 may be used to support the second access network device (such as base station B) to perform the above steps S601, S602-b, S605-b, S1603, And/or other processes used in the techniques described herein. The processor 1910 may be used to support the second access network device (such as base station B) to perform the above steps S603-b, S604-b, S1207, S1209, S1602, S1608, and/or other processes used in the technology described herein . When the network device is an AMF unit, the transceiver 1920 can be used to support the AMF unit to perform the above steps S1203, S1204, S1205, S1206, S1604, S1605, S1606, S1607, and/or other processes used in the technology described herein. When the network device is a UPF unit, the transceiver 1920 may be used to support the UPF unit to perform the above steps S1204, S1205, and/or other processes used in the technology described herein. When the network device is a third access network device (such as base station C), the transceiver 1920 can be used to support the third access network device (such as base station C) to perform the above steps S1603, S1604, S1607, and/or used in this document Other processes of the described technique. The processor 1910 may be used to support the third access network device (such as the base station C) to perform the above step S1608, and/or other processes used in the technology described herein.

Optionally, the UE or the network device further includes a memory 1930, and the memory 1930 may store the program codes in the foregoing method embodiments, so that the processor 1910 can call them.

Specifically, if the UE or the network device includes the processor 1910, the transceiver 1920, and the memory 1930, the processor 1910, the transceiver 1920, and the memory 1930 communicate with each other through an internal connection path, and transfer control and/or data signals. In a possible design, the processor 1910, the transceiver 1920, and the memory 1930 can be implemented by chips. The processor 1910, the transceiver 1920, and the memory 1930 can be implemented on the same chip, or they may be implemented on different chips. Or any combination of two functions can be implemented in one chip. The memory 1930 may store program codes, and the processor 1910 calls the program codes stored in the memory 1930 to implement corresponding functions of the UE or network device.

In an optional manner, when software is used to implement data transmission, it 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. When the computer program instructions are loaded and executed on the computer, all or part of the processes or functions described in the embodiments of the present application are realized. 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. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). 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 integrated with one or more available media. The usable medium may be a magnetic medium, (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

The steps of the method or algorithm described in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions. Software instructions can be composed of corresponding software modules, which can be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, mobile hard disk, CD-ROM or any other form of storage known in the art Medium. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in the ASIC. In addition, the ASIC may be located in the detection device. Of course, the processor and the storage medium may also exist as discrete components in the detection device.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In an optional manner, the present application provides a communication system, which includes a UE, an access network device, an AMF unit, and a UPF unit. The communication system is used to implement a data transmission method for network slicing in any possible implementation manner provided in this application.

In an optional manner, the present application provides a chip system, the chip system includes a processor, a memory, and instructions are stored in the memory; when the instructions are executed by the processor, any one of the possible The data transmission method used for network slicing in the implementation mode. The chip system can be composed of chips, or it can include chips and other discrete devices.

In the several embodiments provided in this application, it should be understood that the disclosed user equipment and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be It can be combined or integrated into another device, or some features can be omitted or not implemented. In addition, 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 parts may or may not be physically separate. The parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. . Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, 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. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product, and the software product is stored in a storage medium. It includes several instructions to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) 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 (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application shall be covered by the protection scope of this application. . Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A data transmission method for network slicing, characterized in that the method includes:

The user equipment UE receives the radio access network notification area RNA indication information from the first access network device, where the RNA indication information is used to indicate the ability of one or more cells to support the network slice selection support information NSSAI service;

If the UE has the NSSAI service transmission requirement, the UE transmits the service data of the NSSAI service through the first cell;

Wherein, the first cell is one of the one or more cells, and the first cell is a cell that supports the NSSAI service.
The method according to claim 1, wherein the UE receiving RNA indication information from a first access network device specifically includes:

The UE receives the RNA indication information from the first access network device through a radio resource control release RRC release message; the RRC release message includes an RNA list, and the RNA list includes the one or more cells; wherein, The RNA indication information includes the ability of each cell in the RNA list to support the NSSAI service.
The method according to claim 1 or 2, wherein if the UE has the NSSAI service transmission demand, the UE transmitting the service data of the NSSAI service through the first cell comprises:

If the UE has the NSSAI service transmission requirement in the deactivated state, the UE sends a radio resource control RRC connection establishment request message to the access network device to which the first cell belongs, and enters the connection from the deactivated state Status, transmitting the service data of the NSSAI service through the first cell.
The method according to any one of claims 1-3, wherein the first cell is a cell where the UE camps in the deactivated state.
The method according to any one of claims 1-3, wherein the UE camps on a second cell in the deactivated state; the second cell is one of the one or more cells One of, the second cell does not support the NSSAI service;

If the UE has the NSSAI service transmission requirement in the deactivated state, the UE enters the connected state from the deactivated state, and transmits the service data of the NSSAI service through the first cell, which specifically includes:

If the UE has the NSSAI service transmission requirement in the deactivated state, the UE accesses the first cell according to the RNA indication information, enters the connected state from the deactivated state, and passes through the first cell. A cell transmits the service data of the NSSAI service.
The method according to claim 1 or 2, wherein the UE camps on a second cell in the deactivated state; the second cell is one of the one or more cells, so The second cell does not support the cell of the NSSAI service; the method further includes:

If the UE has a non-NSSAI service transmission requirement in the deactivated state, the UE sends a radio resource control RRC connection establishment request message to the second access network device, enters the connected state from the deactivated state, and passes all The second cell transmits service data of the non-NSSAI service;

Wherein, the second access network device is an access network device to which the second cell belongs.
The method according to any one of claims 1-6, wherein the RRC connection establishment request message includes: indication information of the service transmission requirement of the UE, and the indication information of the service transmission requirement is used for Indicate whether the service data to be transmitted by the UE is the service data of the NSSAI service or the service data of the non-NSSAI service.
The method according to claim 6 or 7, wherein the RRC connection establishment request message is used to request to establish an RRC connection with the second access network device, and request the second access network device to The transmission channel corresponding to the non-NSSAI service is switched from the first access network device to the second access network device.
The method according to claim 8, wherein the RRC connection establishment request message is also used to request the second access network device to transfer the transmission channel corresponding to the NSSAI service from the first access network device Switch to the second access network device.
The method according to any one of claims 1-9, wherein the transmission channel is established between the first access network device or the second access network device and the user plane function UPF of the core network Between units.
A data transmission method for network slicing, characterized in that the method includes:

Before the user equipment UE enters the deactivated state, the first access network device sends the radio access network notification area RNA indication information to the UE;

Wherein, the RNA indication information is used to indicate the capability of one or more cells to support the network slice selection support information NSSAI service, and at least one cell of the one or more cells supports the NSSAI service.
The method according to claim 11, wherein the sending of the RNA indication information to the UE by the first access network device before the UE enters the deactivated state specifically comprises:

Before the UE enters the deactivated state, the first access network device sends the RNA indication information to the UE through a radio resource control release RRC release message; the RRC release message includes an RNA list, and the RNA list Including the one or more cells; wherein the RNA indication information includes the capability of each cell in the RNA list to support the NSSAI service.
The method of claim 12, wherein:

The RNA indication information is determined by the first access network device with reference to the capability information of at least one cell obtained from the access and mobility management function AMF unit to support the NSSAI service type; or,

The RNA indication information is determined by the first access network device with reference to the ability information of at least one cell to support the NSSAI service of the UE acquired from at least one access network device; the at least one access network device and all The distance between the first access network devices is within a preset range.
The method according to any one of claims 11-13, wherein the method further comprises:

The first access network device receives the radio resource control RRC connection establishment request message sent by the UE when the NSSAI service transmission demand is required; the RRC connection establishment request message is used to request communication with the first access network The device resumes RRC connection;

Restoring the RRC connection between the first access network device and the UE by the first access network device;

The first access network device transmits service data of the NSSAI service of the UE.
The method of claim 14, wherein:

The first access network device is the access network device of the first cell;

Wherein, the first cell is the cell where the UE camps in the deactivated state, and the first cell supports the NSSAI service; or, the first cell is not the UE in the deactivated state. For a cell that is camped on in a state, the first cell is a cell that supports the NSSAI service among the one or more cells.
The method according to any one of claims 11-15, wherein the RRC connection establishment request message includes: indication information of the service transmission requirement of the UE, and the indication information of the service transmission requirement is used for Indicate that the service data to be transmitted by the UE is the service data of the NSSAI service.
The method according to any one of claims 14-16, wherein after the first access network device transmits service data of the NSSAI service of the UE, the method further comprises:

Switching, by the first access network device, the transmission channel corresponding to the NSSAI service from the first access network device to a third access network device or the first access network device;

Wherein, the third access network device is an access network device whose signal strength and/or signal quality received by the UE meet a preset condition.
A data transmission method for network slicing, characterized in that the method includes:

The second access network device receives a radio resource control RRC connection establishment request message from the user equipment UE in the deactivated state; the RRC connection establishment request message is used to request the establishment of an RRC connection with the second access network device; The RRC connection establishment request message includes indication information of the service transmission requirement of the UE, and the indication information of the service transmission requirement is used to indicate whether the service data to be transmitted by the UE is network slice selection support information NSSAI service service data or non-service data. Business data of NSSAI business;

Establishing, by the second access network device, an RRC connection between the second access network device and the UE according to the RRC connection establishment request message;

The second access network device transmits the service data of the UE.
The method according to claim 18, wherein the second access network device is an access network device to which the first cell belongs;

Wherein, the first cell is the cell where the UE camps in the deactivated state, and the first cell supports the NSSAI service; or, the first cell is not the UE in the deactivated state. For the cell that is camped on in the state, the first cell is a cell that supports the NSSAI service.
The method according to claim 18 or 19, wherein the indication information of the service transmission requirement indicates that the service data to be transmitted by the UE is service data of a non-NSSAI service; the RRC connection establishment request message is also used to request Switching, by the second access network device, the transmission channel corresponding to the non-NSSAI service from the first access network device to the second access network device;

After the second access network device establishes the RRC connection between the second access network device and the UE according to the RRC connection establishment request message, the method further includes:

The second access network device sends a transmission channel migration request to the access and mobility management function AMF unit according to the RRC connection establishment request message to request the transmission channel corresponding to the non-NSSAI service to be transferred from the first connection. The network access device is switched to the second access network device.
The method according to claim 20, wherein the RRC connection establishment request message is further used to request the second access network device to transfer the transmission channel corresponding to the NSSAI service from the first access network device Switch to the second access network device; the transmission channel migration request is also used to request the transmission channel corresponding to the NSSAI service to be switched from the first access network device to the second access network device.
The method according to claim 20 or 21, wherein after the second access network device finishes transmitting the service data of the UE, the method further comprises:

Switching the transmission channel corresponding to the non-NSSAI service to the third access network device or the first access network device by the second access network device;

Wherein, the third access network device is an access network device whose signal strength and/or signal quality received by the UE meets preset conditions, and the first access network device is an access network device for which the UE enters the destination network. The last service access network device before activation.
A data transmission method for network slicing, characterized in that the method includes:

Before the user equipment UE enters the deactivated state, the first access network device sends the radio access network notification area RNA indication information to the UE; the RNA indication information is used to indicate that one or more cells support network slice selection support information NSSAI business capabilities;

If the UE has the NSSAI service transmission requirement, the UE transmits the service data of the NSSAI service through the first cell;

Wherein, the first cell is one of the one or more cells, and the first cell is a cell that supports the NSSAI service.
The method according to claim 23, wherein the sending, by the first access network device, the RNA indication information to the UE before the UE enters the deactivated state, specifically comprises:

Before the UE enters the deactivated state, the first access network device sends the RNA indication information to the UE through a radio resource control release RRC release message; the RRC release message includes an RNA list, and the RNA list Including the one or more cells; wherein the RNA indication information includes the capability of each cell in the RNA list to support the NSSAI service.
The method according to claim 23 or 24, wherein the first cell is the cell where the UE camps in the deactivated state; if the UE has the NSSAI service transmission demand, the The UE transmitting the service data of the NSSAI service through the first cell includes:

If the UE has the NSSAI service transmission requirement, the UE sends a radio resource control RRC connection establishment request message to the first access network device; the first access network device is the access to which the first cell belongs Network equipment

Restoring the RRC connection between the first access network device and the UE by the first access network device;

The first access network device transmits service data of the NSSAI service of the UE.
The method according to claim 23 or 24, wherein the first cell is the cell where the UE camps in the deactivated state; if the UE has the NSSAI service transmission demand, the The UE transmitting the service data of the NSSAI service through the first cell includes:

If the UE has the NSSAI service transmission requirement, the UE sends a radio resource control RRC connection establishment request message to the second access network device; the second access network device is the access to which the first cell belongs Network equipment

Establishing, by the second access network device, an RRC connection between the second access network device and the UE;

The second access network device transmits service data of the NSSAI service of the UE.
The method according to claim 23 or 24, wherein the UE camps on a second cell in the deactivated state; the second cell is one of the one or more cells, so The second cell is a cell that does not support the NSSAI service; if the UE has the NSSAI service transmission requirement, the UE transmitting the service data of the NSSAI service through the first cell includes:

If the UE has the NSSAI service transmission requirement in the deactivated state, the UE accesses the first cell according to the RNA indication information;

Sending, by the UE, a radio resource control RRC connection establishment request message to a second access network device; the second access network device is the access network device to which the first cell belongs;

Establishing, by the second access network device, an RRC connection between the second access network device and the UE;

The second access network device transmits service data of the NSSAI service of the UE.
The method according to claim 23 or 24, wherein the UE camps on a second cell in the deactivated state; the second cell is one of the one or more cells, so The second cell does not support the NSSAI service; the method further includes:

If the UE has a non-NSSAI service transmission requirement in the deactivated state, the UE sends a radio resource control RRC connection establishment request message to the second access network device; the second access network device is the first 2. Access network equipment to which the cell belongs;

Establishing, by the second access network device, an RRC connection between the second access network device and the UE;

The second access network device transmits service data of the non-NSSAI service of the UE.
The method according to any one of claims 23-28, wherein the RRC connection establishment request message includes: indication information of the service transmission requirement of the UE, and the indication information of the service transmission requirement is used for Indicate whether the service data to be transmitted by the UE is the service data of the NSSAI service or the service data of the non-NSSAI service.
The method according to claim 28 or 29, wherein the RRC connection establishment request message is further used to request the second access network device to transfer the transmission channel corresponding to the non-NSSAI service from the first access network device. The network access device is switched to the second access network device;

After the second access network device establishes the RRC connection between the second access network device and the UE, the method further includes:

The second access network device sends a transmission channel migration request to the access and mobility management function AMF unit according to the RRC connection establishment request message to request the transmission channel corresponding to the non-NSSAI service to be transferred from the first connection. The network access device is switched to the second access network device;

The AMF unit switches the transmission channel corresponding to the non-NSSAI service from the first access network device to the second access network device.
The method according to claim 30, wherein the RRC connection establishment request message is further used to request the second access network device to transfer the transmission channel corresponding to the NSSAI service from the first access network device Switch to the second access network device; the transmission channel migration request is also used to request the transmission channel corresponding to the NSSAI service to be switched from the first access network device to the second access network device; The method also includes:

The AMF unit switches the transmission channel corresponding to the NSSAI service from the first access network device to the second access network device.
The method according to claim 30 or 31, wherein after the second access network device finishes transmitting the service data of the UE; the method further comprises:

Switching the transmission channel corresponding to the non-NSSAI service to the third access network device or the first access network device by the second access network device;

Wherein, the third access network device is an access network device whose signal strength and/or signal quality received by the UE meets preset conditions, and the first access network device is an access network device for which the UE enters the destination network. The last service access network device before activation.
The method according to any one of claims 23-25, wherein after the UE transmits the service data of the NSSAI service through the first cell, the method further comprises:

The first access network device switches the UE to a third access network device; the third access network device is an access where the signal strength and/or signal quality received by the UE meets preset conditions网设备。 Net equipment.
The method according to any one of claims 23, 24, 26 or 27, wherein after the UE transmits the service data of the NSSAI service through the first cell, the method further comprises:

Switching the UE to a third access network device or the first access network device by the second access network device;

Wherein, the third access network device is an access network device whose signal strength and/or signal quality received by the UE meets a preset condition, and the first access network device is that the UE is the UE The last serving access network device before entering the deactivated state.
The method according to any one of claims 23, 24, or 28, wherein after the second access network device transmits the service data of the non-NSSAI service of the UE, the method further comprises :

Switching the UE to a third access network device or the first access network device by the second access network device;

Wherein, the third access network device is an access network device whose signal strength and/or signal quality received by the UE meets preset conditions, and the first access network device is an access network device for which the UE enters the destination network. The last service access network device before activation.
A user equipment UE, wherein the UE includes: a memory for storing computer program code, the computer program code including instructions;

Radio frequency circuit, used for sending and receiving wireless signals;

The processor is configured to execute the instruction, so that the UE executes the data transmission method for network slicing according to any one of claims 1-10.
An access network device, characterized in that, the access network device includes: a memory for storing computer program code, and the computer program code includes instructions;

Radio frequency circuit, used for sending and receiving wireless signals;

The processor is configured to execute the instruction, so that the access network device executes the data transmission method for network slicing according to any one of claims 11-17 or 18-22.
A communication system comprising the user equipment UE described in claim 36 and the access network equipment described in claim 37.
A computer-readable storage medium, characterized in that a computer-executable instruction is stored on the computer-readable storage medium, and when the computer-executable instruction is executed by a processing circuit, the implementation is as claimed in claims 1-10, 11-17, 18- The data transmission method for network slicing according to any one of 22 or 23-35.
A chip system, characterized in that the chip system includes a processing circuit and a storage medium, and instructions are stored in the storage medium; when the instructions are executed by the processing circuit, the implementation is as claimed in claims 1-10 and 11- 17. The data transmission method for network slicing according to any one of 18-22 or 23-35.
A computer program product, characterized in that, the computer program product includes program instructions, and when the program instructions are executed, they can implement any one of claims 1-10, 11-17, 18-22, or 23-35. The data transmission method for network slicing described in the item.