Configuration method and communication device

Abstract

This application provides a configuration method and a communication device, which relate to the field of communication. In the method, a terminal device may send first information to an access network device, where the first information indicates reducing the capability of the terminal device. The access network device may send a first configuration to the terminal device based on the first capability, where the first capability of the terminal device corresponding to the first configuration is the reduced capability of the terminal device. This helps to avoid configuration failure caused when the access network device configures a capability for the terminal device that exceeds the capability of the terminal device, and improves transmission reliability.

Description

[Technical field]

[0001] [CROSS REFERENCE TO RELATED APPLICATIONS] This application claims priority to Chinese Patent Application No. 202111603401.2, entitled "COMMUNICATION METHOD, UE, AND NETWORK DEVICE", filed with the State Intellectual Property Office of China on December 25, 2021, and Chinese Patent Application No. 202210094691.0, entitled "CONFIGURATION METHOD AND COMMUNICATION APPARATUS", filed with the State Intellectual Property Office of China on January 26, 2022, the entire contents of both of which are incorporated herein by reference.

[0002] [Technical field] This application relates to the field of communications, and more particularly to configuration methods and communication devices in the field of communications. [Background technology]

[0003] In the process of a terminal device communicating with an access network device, the access network device needs to configure the terminal device based on the capability of the terminal device. However, the capability of the terminal device may change. If the access network device configures the terminal device based on the original capability of the terminal device, the configuration may fail, and further communication may fail, affecting transmission reliability. Summary of the Invention

[0004] SUMMARY OF THE PRESENT APPLICATION The embodiments of this application provide a configuration method and a communication device for improving transmission reliability.

[0005] According to a first aspect, a configuration method is provided, the method being applied to a terminal device, the method including the steps of: transmitting first information to an access network device, the first information indicating a capability of the terminal device to be reduced; and receiving a first configuration from the access network device, a first capability of the terminal device corresponding to the first configuration being lower than a second capability of the terminal device.

[0006] In the above solution, the terminal device may send first information to the access network device, where the first information indicates to reduce the capability of the terminal device. The access network device may send a first configuration to the terminal device based on the first capability, where the first capability of the terminal device corresponding to the first configuration is the reduced capability of the terminal device. This helps to avoid configuration failure caused when the access network device configures a capability for the terminal device that exceeds the capability of the terminal device, and improves transmission reliability.

[0007] Furthermore, the above solution can also avoid the case where transmission is interrupted when an access network device configures capabilities for a terminal device that exceed the capabilities of the terminal device, causing the terminal device to disconnect and need to re-report the capabilities of the terminal device, thereby improving transmission performance.

[0008] Alternatively, the first information is used to request a reduction in the capabilities of the terminal device. Alternatively, the first information is used to request a reduction in the initial capabilities of the terminal device.

[0009] Alternatively, the first information is used to request that the capabilities of the terminal device be updated. Alternatively, the first information is used to request that the initial capabilities of the terminal device need to be updated to the current capabilities of the terminal device.

[0010] Alternatively, the first information is used to request the use of a current capability of the terminal device. Alternatively, the first information is used to request the use of a current capability of the terminal device and to request not to use an initial capability of the terminal device.

[0011] Alternatively, the first information is used to request the use of a temporary capability of the terminal device. Alternatively, the first information is used to request the use of a temporary capability of the terminal device and to request not to use an initial capability of the terminal device.

[0012] Alternatively, the first information indicates that the current capability of the terminal device is reduced, ie, the current capability of the terminal device is reduced compared to the initial capability of the terminal device.

[0013] Alternatively, the first information indicates that a currently used capability needs to be changed.

[0014] Optionally, the second capability is a capability of the terminal device stored in the core network device. Optionally, the first capability is a capability of the terminal device stored in the access network device. When the access network device of the terminal device changes and the source access network device changes to the target access network device, the capability of the terminal device stored by the source access network device needs to be released, and the terminal device needs to report the first capability to the target access network device again. However, in the process of the access network device of the terminal device changing, the second capability stored by the core network device is not deleted. In other words, for different access network devices, the second capability does not change, but the first capability may change or may not change obviously. In other words, the second capability may be the inherent capability of the terminal device, and the first capability may be the changed capability of the terminal device compared with the inherent capability.

[0015] Optionally, the second capability is an initial capability of the terminal device, the first capability is a temporary capability of the terminal device, or the first capability is a current capability of the terminal device.

[0016] In some possible implementation manners, before sending the first information to the access network device, the method further includes determining that a current capability of the terminal device is lower than the second capability.

[0017] In the above solution, when the current capability of the terminal device is lower than the second capability of the terminal device, the terminal device may send the first information to the access network device, which can avoid the case where the terminal device blindly sends the first information.

[0018] In some possible implementation manners, the method further includes a step of receiving a system message broadcast by the access network device, the system message including third information, the third information indicating that the terminal device is authorized to send an instruction to reduce the capability of the terminal device.

[0019] In the above solution, the terminal device may receive a system message broadcast by the access network device. If the third information in the system message indicates that the terminal device is permitted to send an instruction to reduce the capability of the terminal device, the terminal device may send the first information to indicate that the capability of the terminal device is reduced. This avoids the case where the access network device cannot identify the first information or discards the first information because the terminal device sends the first information when the access network device does not support the terminal device to send an instruction to reduce the capability of the terminal device, thereby improving transmission reliability.

[0020] In some possible implementation manners, the first capability of the terminal device corresponding to the first configuration includes allowing the terminal device to transmit its current capability. The method further includes: transmitting second information to the access network device, where the second information indicates the current capability of the terminal device; and receiving a second configuration from the access network device, where the second configuration is determined based on the current capability of the terminal device.

[0021] In the above solution, if the first capability of the terminal device corresponding to the first configuration includes allowing the terminal device to transmit its current capability, the terminal device may transmit the second information to the access network device and indicate the current capability of the terminal device based on the second information. In this way, the access network device may transmit the second configuration to the terminal device based on the second information. In other words, the capability of the terminal device corresponding to the first configuration is a conservative capability of the terminal device relative to the initial capability of the terminal device. This avoids failure to configure the terminal device. The terminal device may report the current capability of the terminal device to the access network device based on the conservative second configuration, and the access network device may transmit the second configuration based on the current capability of the terminal device. In this way, the capability of the terminal device corresponding to the second configuration is the actual current capability of the terminal device. In this way, the terminal device and the access network device can perform data transmission based on the actual capability of the terminal device, thereby improving transmission reliability.

[0022] Optionally, transmitting the second information to the access network device may include transmitting the second information based on the first configuration.

[0023] In some possible implementations, the method further includes receiving first filtering information from the access network device; The step of transmitting second information to the access network device includes a step of transmitting the second information to the access network device based on the first filtering information, and the current capabilities of the terminal device indicated by the second information are capabilities related to the first filtering information.

[0024] In the above solution, the terminal device may determine the current capability of the terminal device based on the first filtering information from the access network device, and send the second information to the access network device, which avoids the overhead caused by the terminal device reporting all capabilities to the access network device.

[0025] Optionally, the first filtering information indicates a required capability of the terminal device. The terminal device may reserve the capability of the terminal device indicated by the first filtering information in the initial capability of the terminal device, and filter out the capability not indicated by the first filtering information in the initial capability of the terminal device. In this way, the second information may indicate a reserved part of the capability of the terminal device. For example, the first filtering information indicates a first band and a second band. The terminal device may reserve the capability related to the first band and the second band, and filter out the capability not related to the first band and the second band. This avoids the overhead caused when the terminal device needs to transmit all the capabilities of the terminal device to the access network device.

[0026] Optionally, the access network device may determine the first filtering information based on an implementation manner of the access network device, or the access network device may determine the first filtering information based on an initial capability of the terminal device.

[0027] In some possible implementation manners, the current capabilities of the terminal device include capabilities of the terminal device related to a single carrier and / or capabilities related to a primary cell in which the terminal device is currently located.

[0028] In the above solution, the current capabilities of the terminal device indicated by the second information include the capabilities of the terminal device related to a single carrier and / or the capabilities related to a primary cell in which the terminal device is currently located, which avoids the overhead caused by the terminal device reporting all capabilities of the terminal device.

[0029] In some possible implementations, the second information includes information about band combinations currently supported by the terminal device and / or information about feature sets corresponding to the band combinations.

[0030] In the above solution, the information on the band combinations currently supported by the terminal device and / or the information on the feature sets corresponding to the band combinations, which is included in the second information, may indicate a current capability of the terminal device. In other words, the information on the band combinations currently supported by the terminal device and / or the information on the feature sets corresponding to the band combinations may represent a current capability of the terminal device.

[0031] Optionally, the information about band combinations currently supported by the terminal device includes a correspondence between band combinations currently supported by the terminal device and indices of the currently supported band combinations, and the information about feature sets corresponding to the currently supported band combinations includes a correspondence between feature sets corresponding to the currently supported band combinations and indices of the feature sets corresponding to the currently supported band combinations.

[0032] Optionally, the information regarding band combinations currently supported by the terminal device may indicate band combinations currently supported by the terminal device, in other words, the information regarding band combinations currently supported by the terminal device may include band combinations currently supported by the terminal device, may include indices of band combinations currently supported by the terminal device, or may not include any explicit indication of band combinations currently supported by the terminal device, but may be implicitly indicated by indicating a ranking of band combinations currently supported by the terminal device in a list of band combinations of initial capabilities.

[0033] Optionally, the information on the feature sets corresponding to the band combinations currently supported by the terminal device may indicate the feature sets corresponding to the band combinations currently supported by the terminal device. In other words, the information on the feature sets corresponding to the band combinations currently supported by the terminal device may include the feature sets corresponding to the band combinations currently supported by the terminal device, may include an index of the feature sets corresponding to the band combinations currently supported by the terminal device, or may not include any explicit indication of the feature sets corresponding to the band combinations currently supported by the terminal device, but may be implicitly indicated by indicating a ranking of the feature sets corresponding to the band combinations currently supported by the terminal device in a feature set list corresponding to the band combinations in the initial capabilities.

[0034] In some possible implementations, the second information includes information regarding a changed band combination and information regarding a feature set corresponding to the changed band combination, and the changed band combination is a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to the second capability.

[0035] In the above solution, the access network device may determine a band combination currently supported by the terminal device based on the changed band combination and the band combination corresponding to the initial capability of the terminal device, and the access network device may determine information on the feature set corresponding to the band combination included in the current capability of the terminal device based on information on the feature set of the changed band combination and information on the feature set of the band combination included in the initial capability of the terminal device, which avoids the case where the second information sent by the terminal device includes all capabilities of the terminal device, thereby reducing overhead.

[0036] Optionally, the changed band combination may be a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to the initial capability of the terminal device. Alternatively, the band combination currently supported by the terminal device and the band combination corresponding to the initial capability of the terminal device are the same, but the feature sets corresponding to the band combinations are different. In other words, for a changed band combination, the band combination may change, or the band combination may not change, but the feature sets corresponding to the band combination change.

[0037] Optionally, the information regarding the changed band combination comprises a correspondence between the changed band combination and an index of the changed band combination. Optionally, the information regarding the Feature Set corresponding to the changed band combination comprises a correspondence between the Feature Set corresponding to the changed band combination and an index of the Feature Set corresponding to the changed band combination.

[0038] Optionally, the information about the changed band combination may also indicate the changed band combination, in other words, the information about the changed band combination may include the changed band combination or may include an index of the changed band combination.

[0039] In some possible implementation manners, the step of sending the first information to the access network device includes a step of sending the first information to the access network device through an RRC resume complete message, and the step of receiving the first configuration from the access network device includes a step of receiving a first RRC reconfiguration message from the access network device, the first RRC reconfiguration message including the first configuration.

[0040] In the above solution, when entering the RRC connected mode from the RRC inactive mode, the terminal device may send the first information to the access network device through an RRC resume complete message to avoid a case where the terminal device needs to send the first information through further signaling. The access network device may send the first configuration to the terminal device in a first RRC reconfiguration message when the terminal device enters the RRC connected mode.

[0041] In some possible implementation manners, the step of sending the first information to the access network device includes a step of sending the first information to the access network device through an RRC Resume Request message, and the step of receiving the first configuration from the access network device includes a step of receiving an RRC Resume message from the access network device, the RRC Resume message including the first configuration.

[0042] In the above solution, when entering the RRC connected mode from the RRC inactive mode, the terminal device may send the first information to the access network device through an RRC resume request message to avoid a case where the terminal device needs to send the first information through further signaling. The access network device may send the first configuration to the terminal device in an RRC resume message to avoid a case where the terminal device needs to send the first configuration through further signaling.

[0043] In some possible implementation manners, the step of sending the first information to the access network device includes a step of sending the first information to the access network device through an RRC configuration complete message, and the step of receiving the first configuration from the access network device includes a step of receiving a second RRC reconfiguration message from the access network device, the second RRC reconfiguration message including the first configuration.

[0044] In the above solution, when entering the RRC connected mode from the RRC idle mode, the terminal device may send the first information to the access network device through an RRC configuration complete message to avoid the case where the terminal device needs to send the first information through further signaling. The access network device may send the first configuration to the terminal device in a second RRC reconfiguration message.

[0045] According to a second aspect, there is provided a configuration method, applied to an access network device, comprising the steps of receiving first information, the first information indicating to reduce a capability of a terminal device, and transmitting a first configuration, the first capability of the terminal device corresponding to the first configuration being lower than a second capability of the terminal device.

[0046] In the above solution, the access network device may receive first information, where the first information indicates to reduce a capability of the terminal device. The access network device may send a first configuration to the terminal device based on the first capability, where the first capability of the terminal device corresponding to the first configuration is the reduced capability of the terminal device. This helps to avoid configuration failure caused when the access network device configures a capability for the terminal device that exceeds the capability of the terminal device, and improves transmission reliability.

[0047] In some possible implementations, the second capability is a capability stored in the core network device.

[0048] In some possible implementations, the method further includes a step of broadcasting a system message, the system message including third information, the third information indicating that the terminal device is authorized to send an instruction to reduce the capability of the terminal device.

[0049] In some possible implementation manners, the capability of the terminal device corresponding to the first configuration includes allowing the current capability of the terminal device to be transmitted.

[0050] In some possible implementations, the method further includes a step of receiving second information from the terminal device, where the second information indicates a current capability of the terminal device, and a step of transmitting a second configuration to the terminal device, where the second configuration is determined based on the current capability of the terminal device.

[0051] In some possible implementation manners, the method further includes a step of transmitting first filtering information to a terminal device, and the current capability of the terminal device indicated by the second information is a capability related to the first filtering information.

[0052] In some possible implementation manners, the current capabilities of the terminal device include capabilities of the terminal device related to a single carrier and / or capabilities related to a primary cell in which the terminal device is currently located.

[0053] In some possible implementations, the second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations; or The second information includes information regarding a changed band combination and information regarding a feature set corresponding to the changed band combination, the changed band combination being a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to the second capability.

[0054] In some possible implementation manners, the step of receiving the first information includes a step of receiving an RRC restart complete message, where the RRC restart complete message includes the first information, and the step of transmitting the first configuration includes a step of transmitting a first RRC reconfiguration message, where the first RRC reconfiguration message includes the first configuration.

[0055] In some possible implementation manners, the step of receiving the first information includes a step of receiving an RRC Resume Request message, where the RRC Resume Request message includes the first information, and the step of sending the first configuration includes a step of sending an RRC Resume message, where the RRC Resume message includes the first configuration.

[0056] In some possible implementation manners, the step of receiving the first information includes a step of receiving an RRC configuration complete message, where the RRC configuration complete message includes the first information, and the step of transmitting the first configuration includes a step of transmitting a second RRC reconfiguration message, where the second RRC reconfiguration message includes the first configuration.

[0057] For the description of the second embodiment, please refer to the description of the first embodiment, and in order to avoid repetition, the details will not be described again.

[0058] According to a third aspect, there is provided a configuration method, applied to a terminal device, comprising the steps of receiving a third configuration of the terminal device from an access network device, and indicating to the access network device that a capability of the terminal device corresponding to the third configuration of the terminal device exceeds a current capability of the terminal device.

[0059] In the above solution, after the terminal device receives the third configuration, if the current capability of the terminal device is lower than the capability of the terminal device corresponding to the third configuration, this indicates that the terminal device cannot communicate with the access network device based on the capability of the terminal device corresponding to the third configuration. Therefore, the terminal device may indicate to the access network device that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device. In this way, the access network device may know that the capability currently used by the terminal device is not the capability corresponding to the third configuration, and the access network device does not communicate with the terminal device based on the third configuration, but continues to communicate with the terminal device based on the original configuration. This avoids communication failure caused when the network device communicates with the terminal device based on the third configuration that exceeds the capability of the terminal device, thereby improving transmission reliability.

[0060] Optionally, the capability of the terminal device corresponding to the third configuration may be an initial capability of the terminal device.

[0061] Optionally, the capability of the terminal device corresponding to the third configuration may be a capability stored in the core network device.

[0062] Optionally, the capability of the terminal device corresponding to the third configuration may be a capability stored in the access network device.

[0063] Optionally, the capability of the terminal device corresponding to the third configuration may be a temporary capability of the terminal device.

[0064] Optionally, the third configuration may indicate that the terminal device is permitted to transmit its current capabilities.

[0065] Optionally, the third configuration may include the first filtering information.

[0066] In some possible implementation manners, the step of indicating to the access network device that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device includes:

[0067] When leaving the current configuration unchanged, the terminal device indicates to the access network device that the capabilities of the terminal device corresponding to the third configuration of the terminal device exceed the current capabilities of the terminal device.

[0068] In the above solution, the terminal device may indicate to the access network device that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device based on the current configuration, thereby avoiding a case where the terminal device cannot indicate to the access network device.

[0069] Optionally, the current configuration may be a default configuration.

[0070] Optionally, the current configuration of the terminal device may be the relevant configuration in the broadcast message.

[0071] In some possible implementation manners, the step of receiving a third configuration of the terminal device from the access network device includes a step of receiving a third RRC reconfiguration message from the access network device, where the third RRC reconfiguration message may include the third configuration.

[0072] In some possible implementation manners, the step of receiving a third configuration of the terminal device from the access network device includes a step of receiving an RRC resumption message from the access network device, where the RRC resumption message may include the third configuration.

[0073] In some possible implementation manners, the step of indicating to the access network device that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device includes a step of transmitting a first message to the access network device, the first message including a first field, and information bits carried in the first field indicating that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device.

[0074] Optionally, the first message may be an RRC reconfiguration complete message corresponding to the RRC reconfiguration message, and the RRC reconfiguration complete message may include the first field.

[0075] Optionally, when the access network device sends the third configuration in an RRC resume message, the first message may be an RRC resume complete message, and the RRC resume complete message may include the first field.

[0076] In some possible implementation manners, the terminal device sends second information to the access network device, where the second information indicates a current capability of the terminal device.

[0077] Optionally, an RRC reconfiguration complete message corresponding to the RRC reconfiguration message may include second information.

[0078] Optionally, if the access network device sends the third configuration in the RRC resume message, the RRC resume complete message may include the second information.

[0079] In the above solution, the terminal device implicitly indicates to the access network device that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device by sending the second information to the access network device. In other words, after the access network device receives the current capability of the terminal device indicated by the second information sent by the terminal device, the access network device determines that the capability of the terminal device corresponding to the third configuration exceeds the current capability of the terminal device. This avoids the case where the terminal device needs to send further signaling to indicate that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device.

[0080] In some possible implementation manners, the capability of the terminal device corresponding to the third configuration includes allowing the terminal device to transmit its current capability.

[0081] In some possible implementation manners, the method further includes a step of transmitting second information to the access network device, where the second information indicates a current capability of the terminal device, and a step of receiving a second configuration from the access network device, where the second configuration is determined based on the current capability of the terminal device.

[0082] In some possible implementation manners, the method further includes a step of receiving first filtering information from the access network device, and the step of sending second information to the access network device includes a step of sending the second information to the access network device based on the first filtering information, and the current capability of the terminal device indicated by the second information is a capability related to the first filtering information.

[0083] In some possible implementation manners, the current capabilities of the terminal device include capabilities of the terminal device related to a single carrier and / or capabilities related to a primary cell in which the terminal device is currently located.

[0084] In some possible implementations, the second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations.

[0085] In some possible implementations, the second information includes information regarding a changed band combination and information regarding a feature set corresponding to the changed band combination, and the changed band combination is a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to the second capability.

[0086] For the description of the third aspect, please refer to the description of the first aspect, and in order to avoid repetition, the details will not be described again.

[0087] According to a fourth aspect, there is provided a configuration method, the method being applied to an access network device, comprising: sending a third configuration of a terminal device to the terminal device; and learning from the terminal device that a capability of the terminal device corresponding to the third configuration of the terminal device exceeds a current capability of the terminal device.

[0088] In the above solution, the access network device may send a third configuration to the terminal device. After the terminal device receives the third configuration, if the current capability of the terminal device is lower than the capability of the terminal device corresponding to the third configuration, this indicates that the terminal device cannot communicate with the access network device based on the capability of the terminal device corresponding to the third configuration. Therefore, the terminal device may indicate to the access network device that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device. In this way, the access network device may know that the capability currently used by the terminal device is not the capability corresponding to the third configuration, and the access network device does not communicate with the terminal device based on the third configuration, but continues to communicate with the terminal device based on the original configuration. This avoids communication failure caused when the network device communicates with the terminal device based on the third configuration that exceeds the capability of the terminal device, thereby improving transmission reliability.

[0089] In some possible implementation manners, the capability of the terminal device corresponding to the third configuration is a capability stored in the core network device.

[0090] In some possible implementations, the step of learning from the terminal device that a capability of the terminal device corresponding to the third configuration of the terminal device exceeds a current capability of the terminal device includes: receiving a first message from the terminal device, the first message including a first field, and information bits carried in the first field indicating that a capability of the terminal device corresponding to a third configuration of the terminal device exceeds a current capability of the terminal device; or receiving second information from the terminal device, the second information indicating a current capability of the terminal device; Includes.

[0091] In some possible implementation manners, the capability of the terminal device corresponding to the third configuration includes allowing the terminal device to transmit its current capability.

[0092] In some possible implementations, the method further includes a step of receiving second information from the terminal device, where the second information indicates a current capability of the terminal device, and a step of transmitting a second configuration to the terminal device, where the second configuration is determined based on the current capability of the terminal device.

[0093] In some possible implementation manners, the method further includes a step of transmitting first filtering information to a terminal device, and the current capability of the terminal device indicated by the second information is a capability related to the first filtering information.

[0094] In some possible implementation manners, the current capabilities of the terminal device include capabilities of the terminal device related to a single carrier and / or capabilities related to a primary cell in which the terminal device is currently located.

[0095] In some possible implementations, the second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations.

[0096] In some possible implementations, the second information includes information regarding a changed band combination and information regarding a feature set corresponding to the changed band combination, and the changed band combination is a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to the second capability.

[0097] For the description of the fourth aspect, please refer to the descriptions of the first and third aspects, and in order to avoid repetition, the details will not be described again.

[0098] According to a fifth aspect, there is provided a configuration method, the method being applied to a primary access network device. The method includes:

[0099] The primary access network device and the secondary access network device determine a third capability to be used to configure the terminal device based on a current capability of the terminal device, and the primary access network device configures the terminal device based on the third capability.

[0100] In the above solution, when the terminal device remains connected to both the primary access network device and the secondary access network device, the primary access network device and the secondary access network device may determine a third capability to be used to configure the terminal device based on the current capabilities of the terminal device, and configure the terminal device based on the third capability to avoid a case where the primary access network device and the secondary access network device are unable to configure the terminal device when the capabilities of the terminal device change.

[0101] In some possible implementation manners, the primary access network device and the secondary access network device determine the third capability used to configure the terminal device based on the current capability of the terminal device, The method includes: sending a second message to a secondary access network device, the second message indicating fifth information and / or sixth information, the fifth information indicating determining a capability to be used for configuring the terminal device based on a current capability of the terminal device, and the sixth information indicating the first candidate capability information; and receiving a response message to the second message from the secondary access network device, the response message indicating a third capability, the third capability being obtained based on the first candidate capability information.

[0102] In the above solution, the primary access network device may send a second message to the secondary access network device, where the second message indicates the fifth information and / or the sixth information. If the second message indicates the fifth information, the secondary access network device may determine, based on the fifth information, to determine a capability used to configure the terminal device based on the current capability of the terminal device instead of the initial capability of the terminal device. This avoids the case where the secondary access network device does not know how to select the capability of the terminal device based on which the third capability is determined. Furthermore, the secondary access network device may determine the third capability based on the first candidate capability information indicated by the sixth information, and indicate the third capability through the response message. In other words, the second message is a message used to negotiate and determine the third capability, and the second message used to negotiate and determine the third capability may also indicate to determine the third capability used to configure the terminal device based on the current capability of the terminal device.

[0103] In some possible implementation manners, the current capability of the terminal device included in the second message indicates the fifth information.

[0104] Optionally, after sending the second message, the method further includes: the primary access network device indicates a current capability of the terminal device to the secondary access network device.

[0105] In the above solution, after the primary access network device indicates the current capabilities of the terminal device to the secondary access network device, the primary access network device may include the current capabilities of the terminal device in each second message sent to the secondary access network device to indicate that the capabilities used to configure the terminal device are determined based on the current capabilities of the terminal device instead of the initial capabilities of the terminal device.

[0106] In some possible implementations, the second message includes a second field, and the information bits carried in the second field indicate the fifth information.

[0107] Optionally, the second message includes a fifth field, and information bits carried in the fifth field indicate sixth information, and the sixth information indicates the first candidate capability information.

[0108] In the above solution, when sending the second message to the secondary access network device, the primary access network device may indicate based on the information bits carried in the second field in the second message to determine the capabilities to be used to configure the terminal device based on the current capabilities of the terminal device.

[0109] In some possible implementations, the second message includes a third field, the information bits carried in the third field indicate sixth information, and the position of the third field within the second message indicates fifth information.

[0110] The response message further indicates a third capability and a fifth information, the response message including a fourth field, information bits carried in the fourth field indicating the third capability, and a position of the fourth field within the response message indicating the fifth information.

[0111] In the above solution, when indicating the sixth information to the secondary access network device, the primary access network device may instruct the secondary access network device to determine the capability used to configure the terminal device based on the current capability of the terminal device instead of the initial capability of the terminal device based on the position of the third field carrying the sixth information. In this implicit indication scheme, the signaling overhead can be reduced. Furthermore, the position of the fourth field in the response message indicates that the third capability used to configure the terminal device is determined based on the current capability of the terminal device.

[0112] Optionally, if the second message carries a third field, this indicates that the capability used to configure the terminal device is determined based on the current capability of the terminal device. If the second message does not carry the third field, this indicates that the capability used to configure the terminal device is determined based on the initial capability of the terminal device. The secondary access network device determines whether to determine the capability used to configure the terminal device based on the current capability of the terminal device based on the third field.

[0113] Optionally, when the secondary access network device sends the response message of the second message to the primary access network device, the fourth field indicating the third capability indicates that the third capability used to configure the terminal device is determined based on the current capability of the terminal device. For example, if the response message of the second message carries the fourth field, it indicates that the third capability used to configure the terminal device is determined based on the current capability of the terminal device. If the response message of the second message does not carry the fourth field, it indicates that the third capability used to configure the terminal device is determined based on the initial capability of the terminal device. The primary access network device determines whether the secondary access network device determines the third capability used to configure the terminal device based on the current capability of the terminal device based on the fourth field.

[0114] In some possible implementation manners, the first candidate capability information is information about a candidate band combination, the information about the candidate band combination includes an index of the candidate band combination and an index of a feature set corresponding to the candidate band combination, the response message includes an index of a target band combination selected from the indexes of the candidate band combinations and an index of a target feature set selected from the selected indexes of the feature sets corresponding to the target band combination, the index of the target band combination and the index of the target feature set indicating a third capability.

[0115] Optionally, the index of the band combination may be replaced with an identifier of the band combination.

[0116] Optionally, the Feature Set index may be replaced with a Feature Set identifier.

[0117] In some possible implementations, before the primary access network device and the secondary access network device determine the third capability to be used to configure the terminal device based on the current capability of the terminal device, the method includes: receiving second information from the terminal device, the second information indicating a current capability of the terminal device; sending seventh information to the secondary access network device, the seventh information indicating a current capability of the terminal device; Further includes:

[0118] Optionally, if the primary access network device sends the seventh information to the secondary access network device, this implicitly instructs the secondary access network device to determine a third capability to be used to configure the terminal device based on the current capabilities of the terminal device.

[0119] In some possible implementation manners, the second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations. The information about the band combinations includes a correspondence between band combinations currently supported by the terminal device and indexes of the currently supported band combinations. The information about the feature sets corresponding to the band combinations includes a correspondence between feature sets corresponding to the band combinations and indexes of the feature sets corresponding to the band combinations. The seventh information includes the second information.

[0120] An index of the candidate band combination is selected from the indexes of currently supported band combinations, and an index of a feature set corresponding to the candidate band combination is selected from the indexes of the feature sets corresponding to the band combination.

[0121] In some possible implementations, the second information includes information regarding the changed band combination and information regarding a feature set corresponding to the changed band combination, and the changed band combination is a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to a second capability of the terminal device.

[0122] The information about the changed band combination includes a correspondence between the changed band combination and an index of the changed band combination. The information about the feature set corresponding to the changed band combination includes a correspondence between the feature set corresponding to the changed band combination and an index of the feature set corresponding to the changed band combination. The seventh information includes second information.

[0123] An index of the candidate band combination is determined based on an index of the changed band combination and an index of the band combination corresponding to a second capability of the terminal device, and an index of the feature set corresponding to the candidate band combination is determined based on an index of the feature set corresponding to the changed band combination and an index of the feature set corresponding to the band combination corresponding to the second capability.

[0124] In some possible implementation manners, the current capabilities of the terminal device include capabilities of the terminal device related to a single carrier and / or capabilities related to a primary cell in which the terminal device is currently located.

[0125] In some possible implementation manners, the current capability of the terminal device includes a capability related to the first filtering information, and the first filtering information is sent to the terminal device by the primary access network device.

[0126] In some possible implementations, the method comprises: The method further includes learning from the secondary access network device whether the secondary access network device supports determining the capabilities used to configure the terminal device based on the current capabilities of the terminal device.

[0127] The primary access network device and the secondary access network device determining, based on the current capability of the terminal device, a third capability used to configure the terminal device includes:

[0128] If the primary access network device supports determining a capability used to configure a terminal device based on the current capabilities of the terminal device, and the secondary access network device supports determining a capability used to configure a terminal device based on the current capabilities of the terminal device, the primary access network device and the secondary access network device determine a third capability used to configure the terminal device based on the current capabilities of the terminal device.

[0129] In the above solution, when both the primary access network device and the secondary access network device support determining a capability used to configure the terminal device based on the current capability of the terminal device, the primary access network device and the secondary access network device determine a third capability used to configure the terminal device based on the current capability of the terminal device.

[0130] For the description of the fifth embodiment, please refer to the description of the first embodiment, and in order to avoid repetition, the details will not be described again.

[0131] According to a sixth aspect, there is provided a configuration method, the method being applied to a secondary access network device. The method includes:

[0132] The secondary network device and the primary access network device determine a third capability to be used to configure the terminal device based on a current capability of the terminal device, and the secondary access network device configures the terminal device based on the third capability.

[0133] In the above solution, when the terminal device remains connected to both the primary access network device and the secondary access network device, the primary access network device and the secondary access network device may determine a third capability to be used to configure the terminal device based on the current capabilities of the terminal device, and configure the terminal device based on the third capability to avoid a case where the primary access network device and the secondary access network device are unable to configure the terminal device when the capabilities of the terminal device change.

[0134] In some possible implementation manners, the secondary access network device and the primary access network device determine the third capability used to configure the terminal device based on the current capability of the terminal device, receiving a second message from the primary access network device, the second message indicating fifth information and / or sixth information, the fifth information indicating determining capabilities to be used to configure the terminal device based on a current capability of the terminal device, and the sixth information indicating first candidate capability information; sending a response message to the second message to the primary access network, the response message indicating a third capability, the third capability being obtained based on the first candidate capability information; Includes.

[0135] In some possible implementation manners, the current capability of the terminal device included in the second message indicates the fifth information.

[0136] Optionally, after sending the second message, the method further includes: the primary access network device learns a current capability of the terminal device from the secondary access network device.

[0137] In some possible implementations, the second message includes a second field, and the information bits carried in the second field indicate the fifth information.

[0138] Optionally, the second message includes a fifth field, and information bits carried in the fifth field indicate sixth information, and the sixth information indicates the first candidate capability information.

[0139] In some possible implementations, the second message includes a third field, the information bits carried in the third field indicate sixth information, and the position of the third field within the second message indicates fifth information.

[0140] The response message further indicates a third capability and a fifth information, the response message including a fourth field, information bits carried in the fourth field indicating the third capability, and a position of the fourth field within the response message indicating the fifth information.

[0141] In some possible implementation manners, the first candidate capability information is information about a candidate band combination, the information about the candidate band combination includes an index of the candidate band combination and an index of a feature set corresponding to the candidate band combination, the response message includes an index of a target band combination selected from the indexes of the candidate band combinations and an index of a target feature set selected from the selected indexes of the feature sets corresponding to the target band combination, the index of the target band combination and the index of the target feature set indicating a third capability.

[0142] In some possible implementations, before the secondary access network device and the primary access network device determine the third capability to be used to configure the terminal device based on the current capability of the terminal device, the method includes: The method further includes the step of receiving seventh information from the primary access network device, the seventh information indicating a current capability of the terminal device.

[0143] Optionally, when the secondary access network device receives seventh information from the primary access network device, this implicitly instructs the secondary access network device to determine a third capability to be used to configure the terminal device based on the current capabilities of the terminal device.

[0144] In some possible implementation manners, the second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations. The information about the band combinations includes a correspondence between band combinations currently supported by the terminal device and indexes of the currently supported band combinations. The information about the feature sets corresponding to the band combinations includes a correspondence between feature sets corresponding to the band combinations and indexes of the feature sets corresponding to the band combinations. The seventh information includes the second information.

[0145] An index of the candidate band combination is selected from the indexes of currently supported band combinations, and an index of a feature set corresponding to the candidate band combination is selected from the indexes of the feature sets corresponding to the band combination.

[0146] In some possible implementations, the second information includes information regarding the changed band combination and information regarding a feature set corresponding to the changed band combination, and the changed band combination is a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to a second capability of the terminal device.

[0147] The information about the changed band combination includes a correspondence between the changed band combination and an index of the changed band combination. The information about the feature set corresponding to the changed band combination includes a correspondence between the feature set corresponding to the changed band combination and an index of the feature set corresponding to the changed band combination. The seventh information includes second information.

[0148] An index of the candidate band combination is determined based on an index of the changed band combination and an index of the band combination corresponding to a second capability of the terminal device, and an index of the feature set corresponding to the candidate band combination is determined based on an index of the feature set corresponding to the changed band combination and an index of the feature set corresponding to the band combination corresponding to the second capability.

[0149] In some possible implementation manners, the current capabilities of the terminal device include capabilities of the terminal device related to a single carrier and / or capabilities related to a primary cell in which the terminal device is currently located.

[0150] In some possible implementation manners, the current capability of the terminal device includes a capability related to the first filtering information, and the first filtering information is sent to the terminal device by the primary access network device.

[0151] In some possible implementations, the method further includes a step of indicating to the primary access network device whether the secondary access network device supports determining the capabilities to be used to configure the terminal device based on the current capabilities of the terminal device.

[0152] For the description of the sixth embodiment, please refer to the description of the fifth embodiment, and in order to avoid repetition, the details will not be described again.

[0153] According to a seventh aspect, there is provided a configuration method, the method comprising: sending second information to the access network device, the second information indicating a current capability of the terminal device, the current capability of the terminal device including a capability of the terminal device related to a single carrier and / or a capability related to a primary cell in which the terminal device is currently located; receiving a second configuration configured by the access network device based on the second information; Includes.

[0154] In the above solution, the second information sent by the terminal device to the access network device may indicate a current capability of the terminal device. The current capability of the terminal device includes a single carrier-related capability of the terminal device and / or a primary cell-related capability of the terminal device currently located. The second information does not indicate a single carrier-related capability of the terminal device, nor does it indicate a capability not related to the primary cell of the terminal device currently located, so that signaling overhead can be reduced.

[0155] In some possible implementations, the method includes a step of receiving eighth information from the access network device, the eighth information indicating that the terminal device is authorized to transmit its current capabilities.

[0156] The terminal device transmitting the second information to the access network device includes: and transmitting second information based on the eighth information to the access network device.

[0157] In some possible implementations, the second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations; or The second information includes information regarding a changed band combination and information regarding a feature set corresponding to the changed band combination, the changed band combination being a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to a second capability of the terminal device.

[0158] Optionally, the access network device in the seventh aspect may be replaced with the primary access network device in the fifth aspect.

[0159] For the description of the seventh aspect, please refer to the description of the first aspect, and in order to avoid repetition, the details will not be described again.

[0160] According to an eighth aspect, there is provided a configuration method, the method being applied to an access network device, the method comprising: receiving second information, the second information indicating a current capability of the terminal device, the current capability of the terminal device including a capability of the terminal device related to a single carrier and / or a capability related to a primary cell in which the terminal device is currently located; sending a second configuration to the terminal device based on the second information; Includes.

[0161] In the above solution, the second information sent by the terminal device to the access network device may indicate a current capability of the terminal device. The current capability of the terminal device includes a single carrier-related capability of the terminal device and / or a primary cell-related capability of the terminal device currently located. The second information does not indicate a single carrier-related capability of the terminal device, nor does it indicate a capability not related to the primary cell of the terminal device currently located, so that signaling overhead can be reduced.

[0162] In some possible implementations, the method includes a step of transmitting eighth information to the terminal device, the eighth information indicating that the terminal device is authorized to transmit its current capabilities.

[0163] In some possible implementations, the second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations; or The second information includes information regarding a changed band combination and information regarding a feature set corresponding to the changed band combination, the changed band combination being a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to a second capability of the terminal device.

[0164] Optionally, the access network device in the eighth aspect may be replaced with the primary access network device in the fifth aspect.

[0165] For the description of the eighth aspect, please refer to the description of the first aspect, and in order to avoid repetition, the details will not be described again.

[0166] According to a ninth aspect, there is provided a configuration method, the method being applied to a terminal device, the method comprising: receiving first filtering information from an access network device; sending second information to the access network device based on the first filtering information, the second information indicating a current capability of the terminal device, the current capability of the terminal device indicated by the second information being a capability related to the first filtering information; Includes.

[0167] In the above solution, the second information sent by the terminal device to the access network device may indicate a current capability of the terminal device, where the current capability of the terminal device is a capability obtained based on the first filtering information, and the second information does not indicate a capability not related to the first filtering information, so that signaling overhead can be reduced.

[0168] In some possible implementations, the method comprises: The method further includes the step of receiving eighth information from the access network device, the eighth information indicating that the terminal device is authorized to transmit its current capabilities.

[0169] The terminal device transmitting the second information to the access network device includes transmitting the second information to the access network device based on the eighth information.

[0170] In some possible implementations, the second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations.

[0171] In some possible implementations, the second information includes information regarding a changed band combination and information regarding a feature set corresponding to the changed band combination, and the changed band combination is a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to the second capability.

[0172] Optionally, the access network device in the ninth aspect may be replaced with the primary access network device in the fifth aspect.

[0173] For the description of the ninth aspect, please refer to the description of the first aspect, and in order to avoid repetition, the details will not be described again.

[0174] According to a tenth aspect, there is provided a configuration method, the method being applied to an access network device, the method comprising: transmitting first filtering information; receiving second information, the second information indicating a current capability of the terminal device, the current capability of the terminal device indicated by the second information being a capability related to the first filtering information; Includes.

[0175] In the above solution, the second information sent by the terminal device to the access network device may indicate a current capability of the terminal device, where the current capability of the terminal device is a capability obtained based on the first filtering information, and the second information does not indicate a capability not related to the first filtering information, so that signaling overhead can be reduced.

[0176] In some possible implementations, the method comprises: The method further includes the step of transmitting eighth information, where the eighth information indicates that the terminal device is authorized to transmit its current capabilities.

[0177] In some possible implementations, the second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations.

[0178] In some possible implementations, the second information includes information regarding a changed band combination and information regarding a feature set corresponding to the changed band combination, and the changed band combination is a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to the second capability.

[0179] Optionally, the access network device in the tenth aspect may be replaced with the primary access network device in the fifth aspect.

[0180] For the description of the tenth aspect, please refer to the description of the first aspect, and in order to avoid repetition, the details will not be described again.

[0181] According to an eleventh aspect, the present application provides an apparatus, which is included in an electronic device, and which has functions for implementing the device behaviors in the above aspects and possible implementations of the above aspects. The functions may be implemented by hardware, or may be implemented by the hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions, such as a determination module or unit, or a transceiver module or unit.

[0182] Optionally, the apparatus may be the above-mentioned terminal device, access network device, primary access network device or secondary access network device.

[0183] According to a twelfth aspect, the application provides an apparatus, comprising: a processor, coupled to a memory, the memory configured to store a computer program or instructions, and the processor configured to execute the computer program or instructions stored in the memory, thereby performing the method of the above aspect and possible implementations of the above aspect.

[0184] For example, the processor is configured to execute computer programs or instructions stored in the memory, such that the device performs the methods in the above aspects and possible implementations of the above aspects.

[0185] Optionally, the apparatus comprises one or more processors.

[0186] Optionally, the apparatus may further include a memory coupled to the processor.

[0187] Optionally, the apparatus may include one or more memories.

[0188] Optionally, the memory and the processor may be integrated together or may be located separately.

[0189] Optionally, the apparatus may further include a transceiver.

[0190] Optionally, the apparatus may be the above-mentioned terminal device, access network device, primary access network device or secondary access network device.

[0191] According to a thirteenth aspect, the application provides an electronic device including one or more processors, a memory, a plurality of application programs, and one or more computer programs. The one or more computer programs are stored in the memory. The one or more computer programs include instructions. When the instructions are executed by the electronic device, the electronic device is capable of executing an information processing method in any one of the above aspects or possible realization manners of the above aspects, or a configuration method described in any embodiment of this application.

[0192] Optionally, the electronic device may further include a touchscreen and / or a camera. The touchscreen includes a touch-sensitive surface and a display.

[0193] According to a fourteenth aspect, the application provides a computer-readable storage medium comprising computer instructions, which when executed on an electronic device, enable the electronic device to perform the configuration method in any one of the above aspects or possible implementations of the above aspects, or the configuration method described in any embodiment of this application.

[0194] According to a fifteenth aspect, the present application provides a computer program product, which when run on an electronic device enables the electronic device to execute the configuration method of any one of the above aspects or possible implementations of the above aspects, or the configuration method described in any embodiment of this application.

[0195] According to a sixteenth aspect, the present application provides an apparatus comprising a unit configured to perform a method as described in any embodiment of the present application. [Brief description of the drawings]

[0196] [Figure 1] FIG. 2 is a diagram of an application scenario according to an embodiment of the present application. [Diagram 2] FIG. 2 is a diagram of another application scenario according to an embodiment of the present application. [Diagram 3] 1 is a diagram of a method for entering an RRC connected mode from an RRC idle mode according to an embodiment of the present application. [Figure 4] FIG. 2 is a diagram of a method for entering an RRC connected mode from an RRC inactive mode according to an embodiment of the present application. [Diagram 5] FIG. 2 is a diagram of a configuration method according to an embodiment of the present application. [Figure 6] FIG. 13 is a diagram of another configuration method according to an embodiment of the present application. [Figure 7] FIG. 13 is a diagram of yet another configuration method according to an embodiment of the present application. [Figure 8] FIG. 13 is a diagram of yet another configuration method according to an embodiment of the present application. [Figure 9] FIG. 13 is a diagram of yet another configuration method according to an embodiment of the present application. [Figure 10] FIG. 13 is a diagram of yet another configuration method according to an embodiment of the present application. [Figure 11] FIG. 13 is a diagram of yet another configuration method according to an embodiment of the present application. [Figure 12] FIG. 13 is a diagram of yet another configuration method according to an embodiment of the present application. [Figure 13] FIG. 13 is a diagram of yet another configuration method according to an embodiment of the present application. [Figure 14] FIG. 13 is a diagram of yet another configuration method according to an embodiment of the present application. [Figure 15] FIG. 13 is a diagram of yet another configuration method according to an embodiment of the present application. [Figure 16] FIG. 13 is a diagram of yet another configuration method according to an embodiment of the present application. [Figure 17] 1 is a schematic block diagram of a communication device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0197] Hereinafter, the technical solutions in the embodiments of this application will be described with reference to the accompanying drawings in the embodiments of this application.

[0198] The technical solutions in the embodiments of this application may be applied to various communication systems, such as a global system for mobile communications (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) system, a general packet radio service (GPRS), a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, a universal mobile telecommunications system (UMTS), a worldwide interoperability for microwave access (WiMAX) communication system, and a future 5th generation (5G) system or new radio (NR) system.

[0199] 1 is a diagram of an application scenario applied to an embodiment of this application. As shown in FIG. 1, the system includes: a terminal device 110, an access network device 120, and a core network device 130.

[0200] The terminal device 110 may also be referred to as user equipment (UE), a mobile station (MS), a mobile terminal (MT), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile console, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, a user communications device, etc.

[0201] The terminal device 110 may be a device that provides a voice / data connection to a user, such as a handheld device or an in-vehicle device with a wireless connection function. Currently, some examples of terminal devices include a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant, The terminal device 110 may include a PDA, a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, a terminal device in a future evolved public land mobile network (PLMN), etc., which is not limited in this application. For example, the terminal device 110 is configured to receive a paging message from the access network device 120.

[0202] The access network device 120 may also be referred to as a radio access network (RAN) or a radio access network device. The access network device 120 may be a transmission reception point (TRP), or an evolved NodeB (eNB or eNodeB) in an LTE system, or a home NodeB (e.g., home evolved NodeB or home NodeB, HNB) or a base band unit (BBU), or a radio controller in a cloud radio access network (CRAN) scenario. Alternatively, the access network device 120 may be a relay station, an access point, an in-vehicle device, a wearable device, a network device in a 5G network, a network device in a future evolved PLMN network, or the like, or an access point (AP) in a WLAN, or a gNB in ​​an NR system. Alternatively, the access network device 120 may be a metro base station, a micro base station, a pico base station, a femto base station, or the like. This is not limited in this application. For example, the access network device 120 is configured to send a paging message to page the terminal device 110.

[0203] In a network structure, the access network device 120 may include a central unit (CU) node, a distributed unit (DU) node, or a radio access network (RAN) device including a CU node and a DU node, or a device including a control plane CU node (CU-CP node), a user plane CU node (CU-UP node), and a DU node.

[0204] The core network device 130 is configured to manage one or more access network devices 120. For example, the core network device 130 is configured to transmit information to the access network device 120 used by the access network device to send a paging message, including, for example, an identifier of the terminal device 110 and a group number of the terminal device 110. For example, the core network device 130 may include at least one of a core access and mobility management function (AMF), a user plane function (UPF) network element, a session management function (SMF) network element, a data network (DN) network element, a unified data repository (UDR) network element, and a unified data management (UDM) network element.

[0205] In an embodiment, the terminal device 110 may communicate with the access network device 120 by using a carrier aggregation (CA) technology. Cells on different frequencies of the access network device 120 may simultaneously perform data transmission with the terminal device, thereby realizing a carrier aggregation (CA) function. In the CA technology, one cell is a primary cell (PCell) and another cell is a secondary cell (SCell).

[0206] In an application scenario, as shown in FIG. 2, the terminal device 110 may communicate with the access network devices by using dual connectivity (DC) or multi-connectivity technology, and the terminal device may be connected to both the access network device 121 and the access network device 122. The access network device 121 and the access network device 122 may simultaneously provide data receiving and transmitting services for the terminal device 110. In this way, the terminal device 110 may use the radio resources of the two access network devices simultaneously, so that the rate of data transmitted by the terminal device 110 can be increased. There is a signaling interface between the access network device 121 and the access network device 122. The access network device 121 and the access network device 122 may determine the capability of the terminal device 110 through negotiation through the signaling interface. The access network device 121 and the access network device 122 may configure the terminal device 110 based on the capability of the terminal device 110.

[0207] In Fig. 2, the access network device 121 may be a master base station (master node, MN), the access network device 122 may be a secondary base station (secondary node, SN), and the master base station and the secondary base station support CA. The serving cell of the master base station may be a PCell of the terminal device 110, the serving cell of the secondary base station may be a primary secondary cell (PSCell) of the terminal device 110, and other cells of the master base station and the secondary base station serving the terminal device 110 may be SCells. Multiple cells on different frequencies may simultaneously perform data transmission with the terminal device 110 to realize the CA function. The multiple cells on different frequencies may be multiple cells of the MN, multiple cells of the SN, or multiple cells of the MN and the SN.

[0208] In the following, the numbers are omitted for the sake of explanation. For example, the "terminal device 110" may be the "terminal device", and the "access network device" may be the access network device 120 in FIG. 1, or the access network device 121 or the access network device 122 in FIG.

[0209] The following describes three modes of a terminal device in a radio resource control (RRC) layer. In the RRC layer, the terminal device has three modes, namely, an RRC connected (RRC_CONNECTED) mode, an RRC idle (RRC_IDLE) mode, and an RRC inactive (RRC_INACTIVE) mode. The following describes the three modes.

[0210] RRC Connection Mode

[0211] When a terminal device establishes an RRC connection to an access network device, the terminal device is in an RRC connected mode. In the RRC connected mode, a user plane connection and a control plane connection may be established between the terminal device and the access network device. The terminal device may perform user plane data transmission with the access network device through the user plane connection, and perform control plane signaling transmission with the access network device through the control plane connection.

[0212] RRC Idle Mode

[0213] When the terminal device does not establish an RRC connection to an access network device, the terminal device may be in an RRC idle mode. When the terminal device is in an RRC idle mode, the terminal device may perform public land mobile network (PLMN) selection, the terminal device may receive system messages broadcast by the access network device, the terminal device may perform cell reselection, and the terminal device may receive paging messages.

[0214] RRC Inactive Mode

[0215] After the terminal device establishes an RRC connection to the access network device, the terminal device may enter an RRC inactive mode. If the terminal device does not have a data transmission requirement with the access network device within a preset period of the RRC connected mode, the access network device may determine that the terminal device enters an RRC inactive mode. The access network device may send an RRC Release with suspend indication message to the terminal device. After receiving the RRC Release with suspend indication message, the terminal device reserves the context of the terminal device and enters the RRC inactive mode.

[0216] When the terminal device needs to receive downlink data sent by the access network device or send uplink data to the access network device in the RRC idle mode, the terminal device needs to enter the RRC connected mode. The following describes the process of the terminal device entering the RRC connected mode from the RRC idle mode with reference to Figure 3. As shown in Figure 3, it includes the following steps:

[0217] S310: The terminal device sends an RRC Setup Request message to the access network device.

[0218] Optionally, before S310, the terminal device is in an RRC idle mode. When the terminal device needs to transmit uplink data to an access network device, the terminal device may be triggered to perform S310.

[0219] Optionally, before S310, when the access network device needs to send data to the terminal device, the access network device may send a paging message, and the paging message includes an identifier of the terminal device. After receiving the paging message sent by the access network device, the terminal device executes S310.

[0220] Optionally, the RRC Setup Request message may include at least one of an identifier of a terminal device or a reason for establishing an RRC connection.

[0221] S320: The access network device sends an RRC Setup message to the terminal device, and the terminal device receives the RRC Setup message sent by the access network device.

[0222] S320 includes: The access network device sends an RRC Setup message to the terminal device in response to the RRC Setup Request message.

[0223] S330: The terminal device sends an RRC Setup Complete message to the access network device.

[0224] S330 includes: The terminal device sends an RRC Setup Complete message to the access network device in response to the RRC Setup message.

[0225] After S310 to S330, the terminal device enters the RRC connected mode from the RRC idle mode.

[0226] The following describes a process of a terminal device entering an RRC connected mode from an RRC inactive mode, with reference to Figure 4. As shown in Figure 4, the process includes the following steps:

[0227] S410: The terminal device sends an RRC Resume Request message to the access network device.

[0228] Optionally, before S410, the terminal device is in an RRC inactive mode. When the terminal device needs to transmit uplink data to the access network device, the terminal device may be triggered to execute S410.

[0229] Optionally, before S410, when the access network device needs to send data to the terminal device, the access network device may send a paging message, and the paging message includes an identifier of the terminal device. After receiving the paging message sent by the access network device, the terminal device executes S410.

[0230] Optionally, the RRC Resume Request message may include at least one of a resume identifier, a resume integrity message authentication code, or a resume reason.

[0231] S420: The access network device sends an RRC Resume message to the terminal device, and the terminal device receives the RRC Resume message sent by the access network device.

[0232] S420 includes: The access network device sends an RRC Resume message to the terminal device in response to the RRC Resume Request message.

[0233] S430: The terminal device sends an RRC Resume Complete message to the access network device.

[0234] S430 includes: The terminal device sends an RRC Resume Complete message to the terminal device in response to the RRC Resume message.

[0235] After S410 to S430, the terminal device enters the RRC connected mode from the RRC inactive mode.

[0236] In the process of a terminal device communicating with an access network device, the access network device needs to configure the terminal device, and the terminal device communicates with the access network device based on the configuration provided by the access network device for the terminal device. In the process of an access network device configuring a terminal device, the configuration needs to be performed based on the capability of the terminal device.

[0237] In some scenarios, the capabilities of the terminal device may change. For example, in a multi-card scenario, two or more calling cards may be installed in one mobile phone at the same time. For example, the calling cards may be subscriber identity module (SIM) or universal subscriber identity module (USIM) cards. The mobile phone may register separately in different networks, e.g., different access network devices and / or different core network devices, by using two or more calling cards. Alternatively, the mobile phone may register in the same network, e.g., the same access network device or the same core network device, by using two or more calling cards. It may be understood that one card corresponds to one terminal device or one UE, and multiple cards in one mobile phone are understood as multiple terminal devices or multiple UEs. For example, a mobile phone includes card 1 and card 2. Card 1 is in an RRC connected mode, and card 2 enters the RRC connected mode from an RRC idle mode or an RRC inactive mode. From the perspective of card 1, when only card 1 of the mobile phone is in the RRC connected mode, card 1 may occupy all the capabilities of the mobile phone. When card 2 enters the RRC connected mode, card 2 also needs to occupy some capabilities of the mobile phone to realize normal communication functions. In this case, card 1 may change from occupying all capabilities of the mobile phone to occupying some capabilities of the mobile phone. In this case, the capabilities of card 1 may change and need to be reported again.

[0238] In some other scenarios, the temperature of the terminal device is too high. To reduce the temperature of the terminal device, the terminal device may actively reduce the capabilities of the terminal device to reduce the temperature.

[0239] In embodiment 1, the terminal device may register with the core network device in RRC idle mode. In the registration process, the terminal device may report the capabilities of the terminal device to the access network device and store the capabilities in the core network device. The capabilities stored in the core network device may be referred to as "initial capabilities of the terminal device". Then, when the terminal device enters the RRC connected mode from the RRC idle mode to access the access network device, the access network device may obtain the initial capabilities of the terminal device from the core network device and configure the terminal device according to the initial capabilities of the terminal device. However, in the RRC connected mode, if the capabilities of the terminal device change, the terminal device needs to be disconnected from the RRC connected mode, enter the RRC idle mode, and then indicate to the core network device that the capabilities of the terminal device have changed in the registration process and report the changed capabilities of the terminal device. This will cause transmission interruption and cause poor transmission performance.

[0240] In embodiment 2, the terminal device may register with the core network device in RRC idle mode. In the registration process, the terminal device may report the capabilities of the terminal device to the access network device and store the capabilities in the core network device. The capabilities stored in the core network device may be referred to as "initial capabilities of the terminal device". Then, when the terminal device enters the RRC connected mode from the RRC idle mode to access the access network device, the access network device may obtain the initial capabilities of the terminal device from the core network device and configure the terminal device based on the initial capabilities of the terminal device. In the RRC connected mode, if the capabilities of the terminal device change, the terminal device may report the changed capabilities of the terminal device to the access network device, and the access network device may reconfigure the terminal device based on the reported changed capabilities of the terminal device. This can avoid the case where the terminal device disconnects the RRC connection and enters the RRC idle mode, thereby avoiding interruption of transmission and improving transmission performance. However, in this embodiment, if the access network device configures the terminal device based on the initial capabilities of the terminal device, a configuration failure may be caused because the capabilities of the terminal device change. Therefore, the terminal device may continue to disconnect the RRC connection according to the procedure in embodiment 1, enter the RRC idle mode, indicate to the core network device that the capability of the terminal device has changed in the registration process, and report the changed capability of the terminal device. As a result, the transmission is still interrupted and the transmission performance is insufficient.

[0241] Regarding the above problem, in this embodiment of this application, the terminal device may send first information to the access network device, where the first information indicates to reduce the capability of the terminal device. The access network device may send a first configuration to the terminal device based on the first capability, where the first capability is the reduced capability of the terminal device. This avoids the case where the terminal device needs to disconnect the RRC connection and report the capability of the terminal device again when the access network device configures a capability for the terminal device that exceeds the capability of the terminal device, thereby improving transmission performance. Hereinafter, a configuration method 500 in this embodiment of this application will be described with reference to FIG. 5. As shown in FIG. 5, the method 500 includes the following steps:

[0242] S510: The terminal device sends first information to the access network device, and the access network device receives the first information from the terminal device, where the first information indicates reducing the capability of the terminal device.

[0243] Alternatively, the first information is used to request a reduction in the capabilities of the terminal device. Alternatively, the first information is used to request a reduction in the initial capabilities of the terminal device.

[0244] Alternatively, the first information is used to request that the capabilities of the terminal device be updated. Alternatively, the first information is used to request that the initial capabilities of the terminal device need to be updated to the current capabilities of the terminal device.

[0245] Alternatively, the first information is used to request the use of a current capability of the terminal device. Alternatively, the first information is used to request the use of a current capability of the terminal device and to request not to use an initial capability of the terminal device.

[0246] Alternatively, the first information is used to request the use of a temporary capability of the terminal device. Alternatively, the first information is used to request the use of a temporary capability of the terminal device and to request not to use an initial capability of the terminal device.

[0247] Alternatively, the first information indicates that the current capability of the terminal device is reduced, ie, the current capability of the terminal device is reduced compared to the initial capability of the terminal device.

[0248] Alternatively, the first information indicates that a currently used capability needs to be changed.

[0249] It should be understood that the current capability of the terminal device is the capability currently supported by the terminal device, the capability currently used by the terminal device is the capability used in the process in which the terminal device currently communicates with the access network device, and the capability currently used by the terminal device may be lower than the initial capability of the terminal device.

[0250] Optionally, the terminal device may send the second capability to the core network device according to embodiment 1. When the terminal device accesses the access network device, the terminal device may obtain the second capability of the terminal device from the core network device.

[0251] Optionally, before S510, the method further includes: The terminal device determines that the current capability of the terminal device is lower than the second capability, i.e., the second capability is the initial capability of the terminal device. When the terminal device determines that the current capability of the terminal device is lower than the second capability, the terminal device may execute S510. For example, in a dual card scenario, card 1 and card 2 are installed in a mobile phone. Card 1 is the terminal device in the method 500. Card 2 is in an RRC idle mode, and card 1 is in an RRC connected mode. Card 1 uses all the capabilities of the mobile phone, i.e., all the capabilities of the mobile phone may be the second capability of card 1. After card 2 enters an RRC connected mode from an RRC idle mode, card 2 also needs to use some capabilities of the mobile phone. In this case, the capabilities of the mobile phone used by card 1 are changed from all the capabilities of the mobile phone to some capabilities. For example, before card 2 enters an RRC connected mode, card 1 uses all four antennas of the mobile phone. After card 2 enters the RRC connected mode, card 1 can only use two antennas of the mobile phone, and card 2 uses the remaining two antennas of the mobile phone. Therefore, the capability used by card 1 changes from four antennas (second capability) to two antennas. Therefore, card 1 needs to execute S510 to indicate that the capability of card 1 is to be reduced, and indicate that the capability of card 1 is to be reduced to be lower than four antennas.

[0252] Optionally, S510 includes: The terminal device sends an RRC configuration complete message to the access network device in S330 shown in Figure 3, where the RRC configuration complete message may include first information.

[0253] Optionally, S510 includes: In S410 shown in Figure 4, the terminal device sends an RRC Resume Request message to the access network device, where the RRC Resume Request message may include first information.

[0254] Optionally, S510 may include: In S430 shown in FIG. 4, the terminal device sends an RRC resume complete message to the access network device, where the RRC resume complete message may include first information.

[0255] Optionally, before S510, the access network device may broadcast a system message, where the system message includes third information, and the third information indicates that the terminal device is permitted to send the first information. Thus, after the terminal device obtains the third information in the system message, when the terminal device determines that the current capability is lower than the initial capability of the terminal device, the terminal device may execute S510. In other words, the terminal device transmits the first information only when the access network device permits the terminal device to transmit the first information.

[0256] Alternatively, the third information may indicate that the terminal device is permitted to send an instruction to reduce the capability of the terminal device. When the third information indicates that the access network device permits the terminal device to send an instruction to reduce the capability of the terminal device, the terminal device may execute S510.

[0257] Alternatively, the third information may indicate whether the access network device supports a capability update mechanism. When the third information indicates that the access network device supports a capability update mechanism, the terminal device may execute S510.

[0258] Alternatively, the third information may indicate whether the access network device enables the capability update mechanism. When the third information indicates that the access network device enables the capability update mechanism, the terminal device may execute S510.

[0259] Alternatively, the third information may indicate whether the terminal device is permitted to use the current capability or the temporary capability. When the third information indicates that the terminal device is permitted to use the current capability or the temporary capability, the terminal device may execute S510.

[0260] Alternatively, the third information may indicate whether the terminal device is permitted to reduce the capability. When the third information indicates that the terminal device is permitted to reduce the capability of the terminal device, the terminal device may execute S510.

[0261] S520: The access network device sends a first configuration to the terminal device, and the terminal device receives the first configuration from the access network device, and a capability of the terminal device corresponding to the first configuration is lower than a second capability of the terminal device.

[0262] Optionally, the second capability is the capability of the terminal device stored in the core network device. The first capability is the capability of the terminal device stored in the access network device. When the access network device of the terminal device changes and the source access network device changes to the target access network device, the capability of the terminal device stored by the source access network device needs to be released, and the terminal device needs to report the first capability to the target access network device again. However, in the process of the access network device of the terminal device changing, the second capability stored by the core network device is not deleted. In other words, for different access network devices, the second capability does not change, but the first capability may change or may not change obviously. In other words, the second capability may be the inherent capability of the terminal device, and the first capability may be the changed capability of the terminal device compared with the inherent capability.

[0263] Optionally, the second capability is an initial capability of the terminal device, the first capability is a temporary capability of the terminal device, or the first capability is a current capability of the terminal device.

[0264] Optionally, in S330 shown in Figure 3, when the terminal device sends an RRC configuration complete message to the access network device, and the RRC configuration complete message may include first information, the access network device may send a first RRC reconfiguration message to the terminal device after S330. The first RRC reconfiguration message includes a first configuration. Here, the first RRC reconfiguration message may be a second RRC reconfiguration message.

[0265] Optionally, at S410 shown in FIG. 4, if the terminal device sends an RRC Resume Request message to the access network device, and the RRC Resume Request message may include first information, at S420, the access network device may send an RRC Resume message to the terminal device, and the RRC Resume message may include the first configuration.

[0266] Optionally, in S430 shown in Figure 4, when the terminal device sends an RRC reconfiguration complete message to the access network device, and the RRC reconfiguration complete message may include first information, the access network device may send a first RRC reconfiguration message to the terminal device after S430. The first RRC reconfiguration message may include a first configuration. The first RRC reconfiguration message here may be the first RRC reconfiguration message.

[0267] Optionally, the first capability of the terminal device corresponding to the first configuration includes allowing the terminal device to transmit its current capability. Thus, after S520, the method 500 may further include:

[0268] S530: The terminal device sends second information to the access network device, and the access network device receives the second information, where the second information indicates a current capability of the terminal device.

[0269] Optionally, the current capabilities of the terminal device may include the terminal device's single carrier-related capabilities and / or capabilities related to the primary cell in which the terminal device is currently located. In other words, the terminal device indicates to the access network device the terminal device's single carrier-related capabilities and / or capabilities related to the primary cell in which the terminal device is currently located, and does not indicate capabilities not related to the single carrier and the primary cell, thereby reducing signaling overhead.

[0270] Optionally, the single carrier-related capabilities of the terminal device may include the number of single carriers supported by the terminal device and / or the single carriers supported by the terminal device.

[0271] Optionally, the capability related to the primary cell in which the terminal device is currently located may include CA capability and / or DC capability of the primary cell in which the terminal device is currently located and other cells. Optionally, the CA capability of the primary cell in which the terminal device is currently located and other cells may include a specific cell that forms an aggregate carrier with the primary cell in which the terminal device is currently located. Optionally, the DC capability of the primary cell in which the terminal device is currently located and other cells may include a specific cell that forms dual connectivity with the primary cell in which the terminal device is currently located.

[0272] For example, as shown in Table 1, B in Table 1 indicates a band, and Bx or Bx+By indicates a band combination, i.e., Bx indicates a band combination including one band Bx, and Bx+By indicates a band combination including Bx and By. In Table 1, the band of the primary cell where the terminal device is currently located is B1, the capabilities related to B1 of the primary cell are {B1+B2} and {B1+B3}, and the single carrier bands supported by the terminal device are {B1}, {B2}, and {B3}. The current capabilities of the terminal device are smaller than the initial capabilities by {B2+B3} and {B1+B2+B3}. {B2+B3} is independent of both the single carrier capabilities supported by the terminal device and the primary cell. Therefore, the second information transmitted by the terminal device to the access network device does not need to indicate {B2+B3}. {B1+B2+B3} cannot be supported due to limitations on the current capability of the terminal device, and therefore the second information sent by the terminal device to the access network device may not indicate {B1+B2+B3}. In this way, the current capability of the terminal device indicated by the second information sent by the terminal device to the access network device is smaller than the initial capability of the terminal device by {B2+B3} and {B1+B2+B3}. This can reduce signaling overhead. [Table 1]

[0273] The following describes how the second information indicates the current capability of the terminal device in two cases.

[0274] Case 1: The second information sent by the terminal device may include information about band combinations currently supported by the terminal device and / or information about feature sets corresponding to the currently supported band combinations. The information about band combinations currently supported by the terminal device and / or information about feature sets corresponding to the currently supported band combinations indicates a current capability of the terminal device.

[0275] Optionally, the information about band combinations currently supported by the terminal device includes a correspondence between band combinations currently supported by the terminal device and indices of the currently supported band combinations, and the information about feature sets corresponding to the currently supported band combinations includes a correspondence between feature sets corresponding to the currently supported band combinations and indices of the feature sets corresponding to the currently supported band combinations.

[0276] Optionally, the information regarding band combinations currently supported by the terminal device may indicate band combinations currently supported by the terminal device, in other words, the information regarding band combinations currently supported by the terminal device may include band combinations currently supported by the terminal device, may include indices of band combinations currently supported by the terminal device, or may not include any explicit indication of band combinations currently supported by the terminal device, but may be implicitly indicated by indicating a ranking of band combinations currently supported by the terminal device in a list of band combinations of initial capabilities.

[0277] Optionally, the information on the feature sets corresponding to the band combinations currently supported by the terminal device may indicate the feature sets corresponding to the band combinations currently supported by the terminal device. In other words, the information on the feature sets corresponding to the band combinations currently supported by the terminal device may include the feature sets corresponding to the band combinations currently supported by the terminal device, may include an index of the feature sets corresponding to the band combinations currently supported by the terminal device, or may not include any explicit indication of the feature sets corresponding to the band combinations currently supported by the terminal device, but may be implicitly indicated by indicating a ranking of the feature sets corresponding to the band combinations currently supported by the terminal device in a feature set list corresponding to the band combinations in the initial capabilities.

[0278] Optionally, a terminal device may support one or more band combinations, and a band combination and a feature set corresponding to the band combination may represent one capability of the terminal device. A band combination may correspond to one or more feature sets, and a feature set may correspond to an index of a feature set. In this way, an index of a band combination may correspond to an index of one or more feature sets.

[0279] For example, the second information may include information about {B1} and information about a feature set corresponding to {B1}, information about {B2} and information about a feature set corresponding to {B2}, information about {B3} and information about a feature set corresponding to {B3}, information about {B1+B2} and information about a feature set corresponding to {B1+B2}, and information about {B1+B3} and information about a feature set corresponding to {B1+B3}. The information about {B1} may include indexes of {B1} and {B1}, and the information about the feature set corresponding to {B1} may include indexes of the feature set corresponding to {B1} and the feature set corresponding to {B1}. The information about {B2} may include indexes of {B2} and {B2}, and the information about the feature set corresponding to {B2} may include indexes of the feature set corresponding to {B2} and the feature set corresponding to {B2}. The information about {B3} may include indices for {B3} and {B3}, and the information about the feature set corresponding to {B3} may include indices for the feature set corresponding to {B3} and the feature set corresponding to {B3}. The information about {B1+B2} may include indices for {B1+B2} and {B1+B2}, and the information about the feature set corresponding to {B1+B2} may include indices for the feature set corresponding to {B1+B2} and the feature set corresponding to {B1+B2}. The information about {B1+B3} may include indices for {B1+B3} and {B1+B3}, and the information about the feature set corresponding to {B1+B3} may include indices for the feature set corresponding to {B1+B3} and the feature set corresponding to {B1+B3}.

[0280] Optionally, if the band combination currently supported by the terminal device is the same as the band combination included in the initial capability of the terminal device, and the feature set corresponding to the band combination currently supported by the terminal device is the same as the feature set corresponding to the band combination included in the initial capability of the terminal device, the second information may indicate information about the band combination and not indicate information about the feature set corresponding to the band combination. By default, the information about the feature set corresponding to the band combination that is not indicated is the same as the information about the feature set of the band combination in the initial capability of the terminal device. This can reduce signaling overhead.

[0281] Optionally, the initial capabilities of the terminal device are stored in the core network device, and the information on the band combinations initially supported by the terminal device and the information on the feature sets corresponding to the band combinations initially supported by the terminal device indicate the initial capabilities of the terminal device. Optionally, the information on the band combinations initially supported by the terminal device includes the band combinations initially supported by the terminal device and an index of the band combinations initially supported by the terminal device, and the information on the feature sets corresponding to the band combinations initially supported by the terminal device includes information on the feature sets corresponding to the band combinations initially supported by the terminal device and an index of the feature sets corresponding to the band combinations initially supported by the terminal device. Optionally, the band combinations initially supported by the terminal device may form a band combination list of the initial capabilities.

[0282] Referring to Table 1, for example, {B2} included in the current capability of the terminal device is the same as {B2} included in the initial capability, and the feature set of {B2} included in the current capability is the same as the feature set of {B2} included in the initial capability. {B3} included in the current capability of the terminal device is the same as {B3} included in the initial capability, and the feature set of {B3} included in the current capability is the same as the feature set of {B3} included in the initial capability. Thus, the second information may include information about {B1} and information about the feature set of {B1}, {B2} (or an index of {B2}), {B3} (or an index of {B3}), information about {B1+B2}, information about the feature set corresponding to {B1+B2}, information about {B1+B3}, and information about the feature set corresponding to {B1+B3}. When receiving the second information, the access network device determines that the feature set of {B2} included in the current capability is the same as the feature set of {B2} included in the initial capability, and the feature set of {B3} included in the current capability of the terminal device is the same as the feature set of {B3} included in the initial capability. Therefore, the access network device may determine the feature set corresponding to {B2} in the initial capability as the feature set corresponding to {B2} in the current capability of the terminal device, and determine the feature set corresponding to {B3} in the initial capability as the feature set corresponding to {B3} in the current capability of the terminal device. This avoids the case where the second information further includes information about the feature set corresponding to {B2} and information about the feature set corresponding to {B3}, thereby saving overhead.

[0283] Optionally, if the band combination currently supported by the terminal device is the same as the band combination included in the initial capability of the terminal device, and the information on the feature set corresponding to the band combination currently supported by the terminal device is the same as the information on the feature set corresponding to the band combination included in the initial capability of the terminal device, the second information may include a band combination (or an index of the band combination) and a first information bit, and the first information bit indicates that the information on the feature set corresponding to the band combination is the same as the information on the feature set of the band combination in the initial capability of the terminal device. In this way, the second information may not include information on the feature set corresponding to the band combination. This can reduce signaling overhead. For example, the length of the first information bit may be 1.

[0284] Case 2: The second information includes information regarding a changed band combination and / or information regarding a feature set corresponding to the changed band combination, where the changed band combination is a band combination that has been changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to an initial capability of the terminal device.

[0285] Optionally, the changed band combination may be a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to the initial capability of the terminal device. Alternatively, the band combination currently supported by the terminal device and the band combination corresponding to the initial capability of the terminal device are the same, but the feature sets corresponding to the band combinations are different. In other words, for a changed band combination, the band combination may change, or the band combination may not change, but the feature sets corresponding to the band combination change.

[0286] Optionally, the information regarding the changed band combination comprises a correspondence between the changed band combination and an index of the changed band combination. Optionally, the information regarding the Feature Set corresponding to the changed band combination comprises a correspondence between the Feature Set corresponding to the changed band combination and an index of the Feature Set corresponding to the changed band combination.

[0287] Optionally, the information about the changed band combination may also indicate the changed band combination, in other words, the information about the changed band combination may include the changed band combination or may include an index of the changed band combination.

[0288] Optionally, the terminal device may determine the changed band combination by comparing the band combination currently supported by the terminal device with the initially supported band combination included in the initial capability of the terminal device. The second information may include information about the changed band combination and / or information about the feature set corresponding to the changed band combination. In this way, the access network device may determine information about the band combination currently supported by the terminal device based on the information about the changed band combination and the information about the band combination included in the initial capability of the terminal device. The access network device may determine information about the feature set corresponding to the band combination included in the current capability of the terminal device based on the information about the feature set of the changed band combination and the information about the feature set of the band combination included in the initial capability of the terminal device. In this case, if the information about the band combination in the current capability of the terminal device is the same as the information about the band combination in the initial capability of the terminal device and the information about the corresponding feature set is also the same, the second information may not include information about the same band combination and information about the feature set corresponding to the same band combination. This can reduce signaling overhead.

[0289] Optionally, the changed band combinations may include at least one of band combinations that are no longer supported compared to band combinations in the initial capabilities, band combinations that are newly added compared to band combinations in the initial capabilities, and band combinations that have been changed compared to feature sets corresponding to band combinations in the initial capabilities.

[0290] Optionally, the second information may further include indication information indicating the newly added band combination. In this way, the access network device determines a band combination that is in the changed band combination and is the newly added band combination of the terminal device based on the indication information. Optionally, the second information may not include indication information indicating the newly added band combination, and the second information may include the newly added band combination and an index of the newly added band combination, and a feature set corresponding to the newly added band combination and an index of the feature set corresponding to the newly added band combination. This can implicitly indicate that the band combination is a newly added band combination.

[0291] Optionally, the second information may further include indication information of the band combination changed compared to the feature set corresponding to the band combination in the initial capability. In this way, the access network device determines the changed feature set of the band combination in the changed band combination based on the indication information. Optionally, the second information may not include indication information of the band combination changed compared to the feature set corresponding to the band combination in the initial capability, and the second information may include the changed band combination and an index of the changed band combination, and the feature set corresponding to the newly added combination and an index of the feature set corresponding to the newly added combination. This may implicitly indicate that the band combination is a band combination with a changed feature set.

[0292] Optionally, the second information may further include indication information indicating the band combination that is no longer supported. In this way, the access network device may determine the band combination that is in the changed band combination and is no longer supported by the terminal device based on the indication information. Optionally, the second information may not include indication information indicating that the band combination is no longer supported, and the second information includes an index of the band combination that is no longer supported, but does not include an index of the feature set corresponding to the band combination that is no longer supported. This may implicitly indicate that the terminal device no longer supports the band combination corresponding to the index.

[0293] The following description is provided with reference to Table 2. BC in Table 2 is an abbreviation for band combination, where the index of {BC1} is 1, the index of {BC2} is 2, and the index of {BC3} is 3. The current capabilities of the terminal device are shown in the right column of Table 2, and the initial capabilities of the terminal device are shown in the left column of Table 2. Thus, the second information includes information on {BC2} (or index 2 of {BC2}) and the feature set of {BC2}, {BC3} (or index 3 of {BC3}), and information on {BC4} and information on the feature set of {BC4}. Thus, based on the initial capabilities of the terminal device and the second information, the access network device determines that the capabilities currently supported by the terminal device include {BC1}, {BC2}, and {BC4}, and the feature set corresponding to {BC1} is the same as the feature set of {BC1} included in the initial capabilities of the terminal device. The information on the feature set of {BC2} is included in the second information, and the information on the feature set of {BC4} is also included in the second information. [Table 2]

[0294] Optionally, the above indexes of band combinations may be replaced with identifiers of band combinations, and indexes of feature sets may be replaced with identifiers of feature sets.

[0295] Optionally, the feature set of a band combination may include, but is not limited to, one or more of the following: channel sounding reference signal (SRS) capability, supplementary uplink (SUL) capability, power class, bandwidth size of the band or carrier, number of antennas of the band or carrier, and number of multiple-input multiple-output (MIMO) layers of the band or carrier.

[0296] Optionally, the access network device may send the first filtering information to the terminal device, and the terminal device may receive the first filtering information sent by the access network device. S530 includes: The terminal device sends second information to the access network device based on the first filtering information, and the current capability of the terminal device indicated by the second information is a capability related to the first filtering information. Optionally, the terminal device may reserve a part of the initial capability of the terminal device indicated by the first filtering information, and filter out a part of the initial capability of the terminal device not indicated by the first filtering information. In this way, the second information may indicate a reserved part of the capability of the terminal device. For example, the first filtering information indicates a first band and a second band. The terminal device may reserve a capability related to the first band and the second band, and filter out a capability not related to the first band and the second band.

[0297] For example, as shown in Table 3, the first filtering information may indicate B1 and B2. The terminal device secures capabilities {B1}, {B1+B2}, and {B1+B3} related to B1 and in the initial capabilities of the terminal device, and capabilities {B2} and {B2+B3} related to B2 and in the initial capabilities of the terminal device, and filters out capability {B3} not related to B1 and B2 and in the initial capabilities of the terminal device. {B1+B2+B3} cannot be supported due to restrictions on the current capabilities of the terminal device, so the second information sent by the terminal device to the access network device may not indicate {B1+B2+B3}. Therefore, the current capabilities of the terminal device are smaller than the initial capabilities by {B3} and {B1+B2+B3}. Therefore, the second information sent by the terminal device to the access network device may not indicate {B3} and {B1+B2+B3}. This can reduce signaling overhead. [Table 3]

[0298] Optionally, the access network device may determine the first filtering information based on the implementation manner of the access network device, or the access network device may determine the first filtering information based on the initial capability of the terminal device. In other words, the access network device may determine the capability that needs to be secured by the terminal device based on the initial capability of the terminal device, and indicate the capability that needs to be secured to the terminal device based on the first filtering information.

[0299] Optionally, after determining the current capability of the terminal device based on the first filtering information, the terminal device may send the first filtering information and the second information to the access network device, indicating that the current capability of the terminal device indicated by the second information is obtained based on the first filtering information.

[0300] After the terminal device determines the current capability of the terminal device based on the first filtering information, the manner of indicating by the second information refers to the description in the above case 1 and case 2. In order to avoid repetition, the details will not be described again.

[0301] Optionally, the first configuration in S520 may include first filtering information. In other words, after receiving the first information, the access network device determines that the capability of the terminal device needs to be reduced based on the first information, and the first configuration that may be sent by the access network device to the terminal device may include the first filtering information. In this way, the terminal device may determine the current capability of the terminal device based on the first filtering information, thereby reducing signaling.

[0302] S540: The access network device sends a second configuration to the terminal device, and the terminal device receives the second configuration, where the second configuration is determined based on a current capability of the terminal device.

[0303] Optionally, a third capability of the terminal device corresponding to the second configuration is determined based on a current capability of the terminal device.

[0304] Optionally, the third capability of the terminal device is lower than the second capability of the terminal device.

[0305] Optionally, the relationship between the third capability of the terminal device and the first capability of the terminal device is not limited. The third capability of the terminal device may be higher than the first capability of the terminal device, or may be lower than the first capability of the terminal device.

[0306] For example, the second information sent by the terminal device may indicate that the maximum bandwidth currently supported by the terminal device is 100M, and the access network device may determine that the bandwidth used by the terminal device is 80M based on the maximum bandwidth of 100M supported by the terminal device. In this case, the second configuration sent by the access network device to the terminal device may configure the terminal device to use a bandwidth of 80M. In other words, the second configuration is determined based on the maximum bandwidth of 100M supported by the terminal device.

[0307] S530 and S540 may be executed when the terminal device is in the RRC connected mode.

[0308] In the method 500, after determining that the current capability of the terminal device is lower than the initial capability of the terminal device, the terminal device may send first information to the access network device, where the first information indicates to reduce the capability of the terminal device. In this way, when sending the first configuration to the terminal device, the access network device may perform the configuration based on a capability lower than the initial capability. This helps to avoid the case where the configured capability exceeds the current capability of the terminal device, improving the success rate of the configuration, and avoids the case where the terminal device needs to report the current capability of the terminal device when entering an RRC idle mode, avoiding interruption of transmission, thereby improving transmission performance.

[0309] Two possible configuration methods of the method 500 are described below with reference to Figures 6 and 7. As shown in Figure 6, the method 600 includes the following steps.

[0310] S610: The terminal device sends first information to the access network device, and the access network device receives the first information.

[0311] For S610, please refer to the explanation of S510.

[0312] S620: The access network device sends a first configuration to the terminal device, and the terminal device receives the first configuration.

[0313] Optionally, the first configuration includes allowing the terminal device to transmit the current capabilities. In this manner, the terminal device may execute S630.

[0314] Optionally, if the access network device sends the first filtering information to the terminal device in the method 500, the first configuration in S620 may include the first filtering information.

[0315] S630: The terminal device sends a capability update request to the access network device, where the capability update request includes second information.

[0316] The capability update request is used to request updating the capability of the terminal device, i.e., to request using the current capability of the terminal device, i.e., to request using the capability indicated by the second information. Optionally, the "capability update request" may also be called something like a "capability update indication".

[0317] Optionally, the terminal device reports a capability update request to the access network device based on the first configuration. In other words, the terminal device sends a capability update request to the access network device based on the first configuration.

[0318] Optionally, when the first configuration includes first filtering information, the capability update request may include second information and the first filtering information, where the first filtering information corresponds to the second information. The first filtering information included in the capability update request indicates that the second information is obtained based on the first filtering information.

[0319] S640: The access network device sends confirmation information to the terminal device indicating that the terminal device is authorized to use the terminal device's current capabilities or indicating that the terminal device is permitted to use the terminal device's current capabilities.

[0320] S650: The access network device sends a second configuration to the terminal device based on a current capability of the terminal device, where the second configuration is determined based on the current capability of the terminal device.

[0321] Optionally, the method 600 may not include S 640. If the terminal device receives the second configuration, this indicates that the access network device receives the current capability.

[0322] S660: The terminal device performs data transmission with the access network device based on the second configuration.

[0323] In the method 600, after the terminal device transmits the first information, the access network device may transmit the first configuration to the terminal device. The terminal device transmits a capability update request to the access network device based on the first configuration to request updating the capability of the terminal device. The capability update request includes second information indicating the current capability of the terminal device. In other words, the terminal device requests updating the capability of the terminal device to the current capability of the terminal device indicated by the second information. In this manner, the access network device may transmit the second configuration to the terminal device based on the second information. In other words, the terminal device may request the access network device to update the current capability of the terminal device based on the first configuration transmitted by the access network device.

[0324] The configuration method 700 shown in FIG.

[0325] S710: The terminal device sends first information to the access network device, and the access network device receives the first information.

[0326] For S710, please refer to the explanation of S510.

[0327] S720: The access network device sends a first configuration to the terminal device, and the terminal device receives the first configuration.

[0328] Optionally, the first configuration includes allowing the terminal device to transmit the current capabilities. In this manner, the terminal device may execute S730.

[0329] Optionally, if the access network device sends the first filtering information to the terminal device in the method 500, the first configuration in S720 may include the first filtering information.

[0330] S730: The terminal device sends a capability update request to the access network device, and the access network device receives the capability update request, where the capability update request is used to request updating the capability of the terminal device.

[0331] Optionally, the "capability update request" may also be called by other names, such as a "capability update instruction."

[0332] S740: The access network device sends confirmation information to the terminal device, indicating that the terminal device is authorized or permitted to report the updated capabilities of the terminal device.

[0333] S750: The terminal device sends second information to the access network device, and the access network device receives the second information, where the second information indicates a current capability of the terminal device.

[0334] Optionally, if the first configuration in S720 includes first filtering information, in S750, the terminal device may also send the first filtering information when sending the second information to the access network device, where the second information corresponds to the first filtering information and indicates that the second information is obtained based on the first filtering information.

[0335] Optionally, in a scenario where the terminal device switches access network devices, for example, the access network device in the method 700 is a source access network device. When the access network device of the terminal device is handed over from the source access network device to the target access network device, the source access network device may forward the received second information and the first filtering information to the target access network device, and the target access network device may also determine the second filtering information based on the implementation manner of the target access network device. If the target access network device determines that the second filtering information is the same as the first filtering information from the source access network device, the terminal device does not need to report the current capability of the terminal device to the target access network device based on the second filtering information, and the target access network device directly stores the current capability of the terminal device indicated by the second information from the source access network device, and performs configuration based on the current capability of the terminal device. If the target access network device determines that the second filtering information is different from the first filtering information from the source access network device, the target access network device determines that the capability of the terminal device indicated by the second information is not the capability of the terminal device expected by the target access network device. Therefore, the target access network device may send confirmation information to the terminal device, where the confirmation information carries the second filtering information. The terminal device determines the capabilities currently supported by the terminal device based on the second filtering information, and reports the current capabilities of the terminal device to the target access network device. This avoids the case where the terminal device needs to initiate a capability update request to request the target access network device to report the current capabilities of the terminal device, thereby reducing signaling overhead.The other steps of the target access network device are the same as those of the source access network device, and will not be described in detail to avoid repetition.

[0336] S760: The access network device sends a second configuration to the terminal device based on a current capability of the terminal device, where the second configuration is determined based on the current capability of the terminal device.

[0337] S770: The terminal device performs data transmission with the access network device based on the second configuration.

[0338] In the method 700, after the terminal device transmits the first information, the access network device may transmit the first configuration to the terminal device. The terminal device transmits a capability update request to the access network device based on the first configuration to request updating the capabilities of the terminal device. If the access network device determines that the capability update request of the terminal device is permitted, the terminal device transmits second information to the terminal device indicating the current capabilities of the terminal device. In this manner, the access network device may transmit the second configuration to the terminal device based on the second information. In other words, the terminal device may request the access network device to update the current capabilities of the terminal device based on the first configuration transmitted by the access network device.

[0339] Hereinafter, a configuration method 800 provided in an embodiment of this application will be described with reference to Fig. 8. As shown in Fig. 8, the method 800 includes the following steps:

[0340] S810: The access network device may send a third configuration to the terminal device, and the terminal device receives the third configuration sent by the access network device.

[0341] Optionally, the capability of the terminal device corresponding to the third configuration may be an initial capability of the terminal device.

[0342] Optionally, the capability of the terminal device corresponding to the third configuration may be a capability stored in the core network device.

[0343] Optionally, the capability of the terminal device corresponding to the third configuration may be a capability stored in the access network device.

[0344] Optionally, the capability of the terminal device corresponding to the third configuration may be a temporary capability of the terminal device.

[0345] Optionally, the third configuration may indicate that the terminal device is permitted to transmit its current capabilities.

[0346] Optionally, the third configuration may include the first filtering information.

[0347] Optionally, a third RRC reconfiguration message that is first sent by the access network device to the terminal device after receiving the RRC setup complete message shown in FIG. 3 may include a third configuration.

[0348] Optionally, the access network device may send the third configuration to the terminal device in an RRC resumption message at S420 in FIG.

[0349] Optionally, the first RRC reconfiguration message sent by the access network device to the terminal device after receiving the RRC resume complete message in FIG. 4 may include the third configuration.

[0350] Optionally, before S810, the access network device may broadcast a system message, where the system message includes the third information, and the third information indicates that the terminal device is permitted to transmit its current capability. Thus, after obtaining the third information in the system message, the terminal device may execute S830 after executing S820. In other words, the terminal device transmits the second information to indicate the terminal device's current capability only when the access network device permits the terminal device to transmit.

[0351] Alternatively, the third information may indicate whether the access network device supports a capability update mechanism. When the third information indicates that the access network device supports a capability update mechanism, the terminal device may execute S830.

[0352] Alternatively, the third information may indicate whether the access network device enables the capability update mechanism. When the third information indicates that the access network device enables the capability update mechanism, the terminal device may execute S830.

[0353] Alternatively, the third information may indicate whether the terminal device is permitted to use the current capability or the temporary capability. When the third information indicates that the terminal device is permitted to use the current capability or the temporary capability, the terminal device may execute S830.

[0354] Alternatively, the third information may indicate whether the terminal device is permitted to report the current capabilities or temporary capabilities of the terminal device. When the third information indicates that the terminal device is permitted to report the current capabilities or temporary capabilities of the terminal device, the terminal device may execute S830.

[0355] S820: The terminal device indicates to the access network device that a capability of the terminal device corresponding to a third configuration of the terminal device exceeds a current capability of the terminal device.

[0356] Optionally, when it determines that the current capability of the terminal device is lower than the capability of the terminal device corresponding to the third configuration, the terminal device executes S820.

[0357] Optionally, when the access network device sends a third configuration through an RRC reconfiguration message, if the terminal device determines that the current capability of the terminal device is lower than the capability of the terminal device corresponding to the third configuration, the terminal device does not consider that the RRC reconfiguration has failed, and the terminal device continues to stay in the current RRC connection mode instead of triggering an RRC re-establishment process, and indicates to the access network device that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device. In this way, the terminal device can be prevented from performing an RRC re-establishment procedure.

[0358] Optionally, when the access network device sends the third configuration through the RRC resumption message, if the terminal device determines that the current capability of the terminal device is lower than the capability of the terminal device corresponding to the third configuration, the terminal device does not consider the RRC resumption to have failed, and instead of triggering a process of performing an RRC resumption setting request, the terminal device may continue to send an RRC resumption complete message to the access network device, and indicate to the access network device in the RRC resumption complete message that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device. In this way, the terminal device can be prevented from performing the RRC resumption procedure again.

[0359] For example, in a dual card scenario, card 1 and card 2 are installed in a mobile phone. Card 1 is a terminal device in the method 800. Card 2 is in RRC idle mode, and card 1 is in RRC connected mode. The access network device sends a third configuration to card 1 based on all the capabilities of the mobile phone. However, in this case, card 2 enters RRC connected mode, and card 1 cannot use all the capabilities of the mobile phone, that is, all the capabilities of the mobile phone may be the initial capabilities of card 1. After card 2 enters RRC connected mode from RRC idle mode, card 2 also needs to use some capabilities of the mobile phone, and the capabilities of the mobile phone used by card 1 need to be changed from all capabilities to some capabilities. Therefore, card 1 needs to indicate to the access network device that the capabilities corresponding to the third configuration exceed the current capabilities of card 1.

[0360] Optionally, S820 includes: the terminal device indicates to the access network device, based on a current capability, that a capability of the terminal device corresponding to a third configuration of the terminal device exceeds the current capability of the terminal device.

[0361] Optionally, the terminal device indicating to the access network device, based on the current capability, that a capability of the terminal device corresponding to the third configuration of the terminal device exceeds a current capability of the terminal device may include: when leaving the current configuration unchanged, the terminal device indicates to the access network device that a capability of the terminal device corresponding to the third configuration of the terminal device exceeds a current capability of the terminal device.

[0362] Optionally, the current configuration of the terminal device may be a default configuration.

[0363] Optionally, the current configuration of the terminal device may be the relevant configuration in the broadcast message.

[0364] Optionally, the terminal device indicating to the access network device, based on the current capability, that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device, may include: the terminal device indicating to the access network device, based on the configuration of the capability relationship in the current configuration, that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device.

[0365] Optionally, the terminal device may indicate to the access network device that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device in any one of the following manners.

[0366] Method 1: The terminal device may send a first message to the access network device, where the first message includes a first field, and an information bit carried in the first field indicates that a capability of the terminal device corresponding to a third configuration of the terminal device exceeds a current capability of the terminal device.

[0367] Optionally, the first message may be an RRC reconfiguration complete message corresponding to the RRC reconfiguration message, and the RRC reconfiguration complete message may include the first field.

[0368] Optionally, when the access network device sends the third configuration in an RRC resume message, the first message may be an RRC resume complete message, and the RRC resume complete message may include the first field.

[0369] Manner 2: The terminal device sends second information to the access network device, where the second information indicates a current capability of the terminal device.

[0370] Optionally, an RRC reconfiguration complete message corresponding to the RRC reconfiguration message may include second information.

[0371] Optionally, if the access network device sends the third configuration in the RRC resume message, the RRC resume complete message may include the second information.

[0372] In other words, the terminal device implicitly indicates to the access network device that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device by sending the second information to the access network device. In other words, after the access network device receives the current capability of the terminal device indicated by the second information sent by the terminal device, the access network device determines that the capability of the terminal device corresponding to the third configuration exceeds the current capability of the terminal device.

[0373] For the current capability of the terminal device indicated by the second information, please refer to the description of the method 500. To avoid repetition, details will not be described.

[0374] Optionally, if the terminal device indicates to the access network device in method 2 that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device, method 800 may not include S830, and may include S840.

[0375] Optionally, if the terminal device indicates to the access network device in method 1 that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device, optionally, method 800 may include the following steps.

[0376] S830: The terminal device sends second information to the access network device, and the access network device receives the second information, where the second information indicates a current capability of the terminal device.

[0377] For an explanation of S830, please refer to the explanation of S530.

[0378] Optionally, if the capability of the terminal device corresponding to the third configuration includes allowing the terminal device to transmit the current capability, the terminal device may execute S830. Obviously, the terminal device may alternatively actively transmit the second information to the access network device without relying on the third configuration.

[0379] S840: The access network device sends a second configuration to the terminal device, and the terminal device receives the second configuration, where the second configuration is determined based on a current capability of the terminal device.

[0380] For an explanation of S840, please refer to the explanation of S540.

[0381] In the method 500, after the terminal device receives the third configuration, if the terminal device determines that the current capability of the terminal device is lower than the capability of the terminal device corresponding to the third configuration, this indicates that the terminal device cannot communicate with the access network device based on the capability of the terminal device corresponding to the third configuration. Therefore, the terminal device may indicate to the access network device that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device. In this way, the access network device may know that the capability currently used by the terminal device is not the capability corresponding to the third configuration, and the access network device does not communicate with the terminal device based on the third configuration, but continues to communicate with the terminal device based on the original configuration. This avoids communication failures caused when the network device communicates with the terminal device based on the third configuration that exceeds the capability of the terminal device, thereby improving transmission reliability.

[0382] Two possible configuration methods of the method 800 are described below with reference to Figures 9 and 10. As shown in Figure 9, the method 900 includes the following steps.

[0383] S910: The access network device sends a third configuration to the terminal device, and the terminal device receives the third configuration.

[0384] For S910, please refer to the explanation of S810.

[0385] S920: The terminal device sends a first message to the access network device, where the first message includes a first field, and an information bit carried in the first field indicates that a capability of the terminal device corresponding to a third configuration of the terminal device exceeds a current capability of the terminal device.

[0386] The S920 corresponds to method 1 of the S820.

[0387] Optionally, S920 includes: The terminal device may send a first message to the access network device based on a configuration in the broadcast message.

[0388] S930: The terminal device may send a capability update request to the access network device, where the capability update request includes second information.

[0389] The capability update request is used to request updating the capability of the terminal device, i.e., to request using the current capability of the terminal device, i.e., to request using the capability indicated by the second information. Optionally, the "capability update request" may also be called something like a "capability update indication".

[0390] Optionally, the terminal device reports the capability update request to the access network device based on the configuration in the broadcast. In other words, the terminal device reports the capability update request to the access network device based on a default configuration.

[0391] Optionally, when the third configuration includes first filtering information, the capability update request may include the second information and the first filtering information, where the first filtering information corresponds to the second information. The first filtering information included in the capability update request indicates that the second information is obtained based on the first filtering information.

[0392] Optionally, if the first capability of the terminal device corresponding to the third configuration includes allowing the terminal device to transmit its current capability, the terminal device may execute S930.

[0393] S940: The access network device sends confirmation information to the terminal device, indicating that the terminal device is authorized to use the current capabilities of the terminal device, or indicating that the terminal device is permitted to use the current capabilities of the terminal device.

[0394] S950: The access network device sends a second configuration to the terminal device based on a current capability of the terminal device, where the second configuration is determined based on the current capability of the terminal device.

[0395] Optionally, the method 900 may not include S 940. If the terminal device receives the second configuration, this indicates that the access network device receives the current capability.

[0396] S960: The terminal device performs data transmission with the access network device based on the second configuration.

[0397] Optionally, the method 900 may not include S920. In this case, the second information in S930 may implicitly indicate that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device. A scenario in which S920 is not included in the method 900 may correspond to the method 2 in S820.

[0398] In the method 900, after the access network device sends the third configuration to the terminal device, if the current capability of the terminal device is lower than the capability corresponding to the third configuration, the terminal device sends a first message to the access network device. The information bit carried in the first field in the first message indicates that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device. Furthermore, the terminal device sends a capability update request to the access network device to request updating the capability of the terminal device. The capability update request includes second information indicating the current capability of the terminal device. In other words, the terminal device requests updating the capability of the terminal device to the current capability of the terminal device indicated by the second information. In this way, the access network device may send the second configuration to the terminal device based on the second information.

[0399] The configuration method 1000 shown in FIG.

[0400] S1010: The access network device sends a third configuration to the terminal device, and the terminal device receives the third configuration.

[0401] For S1010, please refer to the explanation of S810.

[0402] Optionally, the third configuration may include the first filtering information.

[0403] S1020: The terminal device sends a first message to the access network device, the first message including a first field, and an information bit carried in the first field indicates that a capability of the terminal device corresponding to a third configuration of the terminal device exceeds a current capability of the terminal device.

[0404] The S1020 corresponds to method 1 of the S820.

[0405] Optionally, the terminal device may send the first message to the access network device based on a configuration in the broadcast message.

[0406] S1030: The terminal device sends a capability update request to the access network device, and the access network device receives the capability update request, where the capability update request is used to request updating the capability of the terminal device.

[0407] Optionally, the "capability update request" may also be called by other names, such as a "capability update instruction."

[0408] Optionally, the terminal device may execute S1020 and S1030 simultaneously, or may execute S1020 and S1030 separately, which is not limited in this embodiment of the application.

[0409] S1040: The access network device sends confirmation information to the terminal device, indicating that the terminal device is authorized or permitted to report the updated capabilities of the terminal device.

[0410] S1050: The terminal device sends second information to the access network device, and the access network device receives the second information, where the second information indicates a current capability of the terminal device.

[0411] Optionally, when the third configuration in S1010 includes first filtering information, in S1050, the terminal device also sends the first filtering information when sending the second information to the access network device, where the second information corresponds to the first filtering information and indicates that the second information is obtained based on the first filtering information.

[0412] Optionally, in a scenario where the terminal device switches access network devices, for example, the access network device in the method 1000 is a source access network device. When the access network device of the terminal device is handed over from the source access network device to the target access network device, the source access network device may forward the received second information and the first filtering information to the target access network device, and the target access network device may also determine the second filtering information based on the implementation manner of the target access network device. If the target access network device determines that the second filtering information is the same as the first filtering information from the source access network device, this indicates that the terminal device does not need to report the current capability of the terminal device to the target access network device based on the second filtering information, and the target access network device directly stores the current capability of the terminal device indicated by the second information from the source access network device, and performs configuration based on the current capability of the terminal device. If the target access network device determines that the second filtering information is different from the first filtering information from the source access network device, the target access network device determines that the capability of the terminal device indicated by the second information is not the capability of the terminal device expected by the target access network device. Therefore, the target access network device may send confirmation information to the terminal device, where the confirmation information carries the second filtering information. The terminal device determines the capabilities currently supported by the terminal device based on the second filtering information, and reports the current capabilities of the terminal device to the target access network device. This avoids the case where the terminal device needs to initiate a capability update request to request the target access network device to report the current capabilities of the terminal device, thereby reducing signaling overhead.The other steps of the target access network device are the same as those of the source access network device, and will not be described in detail to avoid repetition.

[0413] S1060: The access network device sends a second configuration to the terminal device based on a current capability of the terminal device, where the second configuration is determined based on the current capability of the terminal device.

[0414] S1070: The terminal device performs data transmission with the access network device based on the second configuration.

[0415] In the method 1000, after the access network device sends the third configuration to the terminal device, if the current capability of the terminal device is lower than the capability corresponding to the third configuration, the terminal device sends a first message to the access network device. The information bit carried in the first field in the first message indicates that the capability of the terminal device corresponding to the third configuration of the terminal device exceeds the current capability of the terminal device. Furthermore, the terminal device sends a capability update request to the access network device to request updating the capability of the terminal device. If the access network device determines that the capability update request of the terminal device is granted, the terminal device sends second information to the terminal device indicating the current capability of the terminal device. In this way, the access network device may send the second configuration to the terminal device based on the second information.

[0416] The above method embodiment is applicable to the scenario shown in FIG. 1. In the scenario shown in FIG. 2, the access network device 121 and the access network device 122 may respectively determine the capability of the terminal device based on the current capability of the terminal device. The access network device 121 may be a primary access network device below, and the access network device 122 may be a secondary access network device below. The primary access network device and the secondary access network device may respectively determine the capability of the terminal device based on the current capability of the terminal device. In this way, the primary access network device and the secondary access network device may respectively configure the terminal device based on the determined capability of the terminal device. Hereinafter, the method 1100 will be described with reference to FIG. 11. As shown in FIG. 11, the method 1100 includes the following steps:

[0417] S1110: The secondary access network device indicates to the primary access network device that the secondary access network device supports determining capabilities used to configure the terminal device based on the current capabilities of the terminal device, and the primary access network device learns that the secondary access network device supports determining capabilities used to configure the terminal device based on the current capabilities of the terminal device.

[0418] Optionally, the secondary access network device may indicate to the primary access network device that the secondary access network device supports determining the capabilities to be used to configure the terminal device based on the current capabilities of the terminal device based on the secondary access network device addition message sent to the primary access network device.

[0419] Alternatively, the secondary access network device may indicate to the primary access network device that the secondary access network device enables the capability update mechanism, and the primary access network device knows that the secondary access network device enables the capability update mechanism.

[0420] Optionally, the secondary access network device may indicate to the primary access network device whether the secondary access network device enables the capability update mechanism based on any message sent to the primary access network device.

[0421] Optionally, the secondary access network device may indicate to the primary access network device whether the secondary access network device supports determining the capabilities used to configure the terminal device based on the current capabilities of the terminal device. If the secondary access network device indicates that the secondary access network device does not support determining the capabilities used to configure the terminal device based on the current capabilities of the terminal device, the method 1100 ends.

[0422] Alternatively, the secondary access network device may indicate to the primary access network device whether the secondary access network device enables the capability update mechanism. If the secondary access network device does not enable the capability update mechanism, the method 1100 ends.

[0423] Optionally, whether the secondary access network device enables the capability update mechanism may be replaced with whether the secondary access network device supports the capability update mechanism, or may be replaced with whether the secondary access network device supports updating the capabilities of the terminal device, or may be replaced with whether the secondary access network device supports updating the initial capabilities of the terminal device.

[0424] It should be noted that S1110 is an optional step. Alternatively, an operation, administration, and maintenance (OAM) network element may configure or indicate to the primary access network device that the secondary access network device supports determining the capabilities used to configure the terminal device based on the current capabilities of the terminal device. In this case, the secondary access network device does not need to be used to indicate to the primary access network device.

[0425] It may be understood that determining the capabilities used to configure the terminal device may be understood as follows: the primary access network device and the secondary access network device need to negotiate capabilities, and then the primary access network device and the secondary access network device need to configure the terminal device separately based on the negotiated capabilities. After receiving the configurations of the primary access network device and the secondary access network device, the terminal device may determine that the capabilities of the terminal device are the capabilities determined by the primary access network device and the secondary access network device through negotiation.

[0426] S1120: If the primary access network device supports determining a configuration of the terminal device based on the current capabilities of the terminal device, and the secondary access network device also supports determining a configuration of the terminal device based on the current capabilities of the terminal device, the primary access network device sends an instruction to the terminal device to allow the terminal device to report the current capabilities of the terminal device.

[0427] Alternatively, if the secondary access network device enables the capability update mechanism and the primary access network device enables the capability update mechanism, the primary access network device sends an indication to the terminal device indicating that the terminal device is permitted to report the current capabilities of the terminal device.

[0428] Alternatively, if the secondary access network device supports the capability update mechanism and the primary access network device supports the capability update mechanism, the primary access network device sends an indication to the terminal device indicating that the terminal device is permitted to report the current capabilities of the terminal device.

[0429] S1130: The terminal device sends second information to the primary access network device, and the primary access network device receives the second information, where the second information indicates a current capability of the terminal device.

[0430] Optionally, the method 1100 may not include any one of steps S1110 to S1130, and the primary access network device may store the current capability of the terminal device, so that S1140 may be executed.

[0431] For the description of S1130, please refer to the description of S530. The difference is that the access network device in S530 may be the primary access network device in the method 1100. Other descriptions are similar to the description in S530. In order to avoid repetition, details will not be described again.

[0432] Similar to the description of S530, there are two cases in which the second information indicates the current capability of the terminal device.

[0433] Case 1: The second information sent by the terminal device may include information about band combinations currently supported by the terminal device and / or information about feature sets corresponding to the currently supported band combinations. The information about band combinations currently supported by the terminal device and information about feature sets corresponding to the currently supported band combinations indicate a current capability of the terminal device.

[0434] Optionally, the information about band combinations currently supported by the terminal device includes a correspondence between band combinations currently supported by the terminal device and indices of the currently supported band combinations, and the information about feature sets corresponding to the currently supported band combinations includes a correspondence between feature sets corresponding to the currently supported band combinations and indices of the feature sets corresponding to the currently supported band combinations.

[0435] Optionally, the information regarding band combinations currently supported by the terminal device may indicate band combinations currently supported by the terminal device, in other words, the information regarding band combinations currently supported by the terminal device may include band combinations currently supported by the terminal device, may include indices of band combinations currently supported by the terminal device, or may not include any explicit indication of band combinations currently supported by the terminal device, but may be implicitly indicated by indicating a ranking of band combinations currently supported by the terminal device in a list of band combinations of initial capabilities.

[0436] Optionally, the information on feature sets corresponding to band combinations currently supported by the terminal device may indicate feature sets corresponding to band combinations currently supported by the terminal device. In other words, the information on feature sets corresponding to band combinations currently supported by the terminal device may include feature sets corresponding to band combinations currently supported by the terminal device, may include indexes of feature sets corresponding to band combinations currently supported by the terminal device, or may not include any explicit indication of feature sets corresponding to band combinations currently supported by the terminal device, but may be implicitly indicated by indicating a ranking of feature sets corresponding to band combinations currently supported by the terminal device among feature sets corresponding to band combinations in the initial capabilities.

[0437] The other description of Case 1 is similar to that of S530, and will not be described in detail to avoid repetition.

[0438] Case 2: The second information includes information regarding a changed band combination and / or information regarding a feature set corresponding to the changed band combination, where the changed band combination is a band combination that has been changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to an initial capability of the terminal device.

[0439] Optionally, the changed band combination may be a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to the initial capability of the terminal device. Alternatively, the band combination currently supported by the terminal device and the band combination corresponding to the initial capability of the terminal device are the same, but the feature sets corresponding to the band combinations are different. In other words, for a changed band combination, the band combination may change, or the band combination may not change, but the feature sets corresponding to the band combination change.

[0440] Optionally, the information regarding the changed band combination comprises a correspondence between the changed band combination and an index of the changed band combination. Optionally, the information regarding the Feature Set corresponding to the changed band combination comprises a correspondence between the Feature Set corresponding to the changed band combination and an index of the Feature Set corresponding to the changed band combination.

[0441] Optionally, the information about the changed band combination may also indicate the changed band combination, in other words, the information about the changed band combination may include the changed band combination or may include an index of the changed band combination.

[0442] Optionally, the terminal device may determine the changed band combination by comparing the band combination currently supported by the terminal device with the initially supported band combination included in the initial capability of the terminal device. The second information may include information about the changed band combination and / or information about the feature set corresponding to the changed band combination. In this way, the access network device may determine information about the band combination currently supported by the terminal device based on the information about the changed band combination and the information about the band combination included in the initial capability of the terminal device. The access network device may determine information about the feature set corresponding to the band combination included in the current capability of the terminal device based on the information about the feature set of the changed band combination and the information about the feature set of the band included in the initial capability of the terminal device. In this case, if the information about the band combination in the current capability of the terminal device is the same as the information about the band combination in the initial capability of the terminal device and the information about the corresponding feature set is also the same, the second information may not include information about the same band combination and information about the feature set corresponding to the same band combination. This can reduce signaling overhead.

[0443] The other description of Case 2 is similar to that of S530, and will not be described in detail to avoid repetition.

[0444] S1140: The primary access network device sends seventh information to the secondary access network device, and the secondary access network device receives the seventh information, where the seventh information indicates a current capability of the terminal device.

[0445] Optionally, the seventh information includes the second information, that is, the primary access network device sends the second information from the terminal device to the secondary access network device.

[0446] Optionally, the content included in the seventh information is the same as the content included in the second information. In other words, when the second information in case 1 in S1130 includes information on the band combination currently supported by the terminal device and / or information on the feature set corresponding to the currently supported band combination, the seventh information also includes information on the band combination currently supported by the terminal device and / or information on the feature set corresponding to the currently supported band combination. When the second information in case 2 in S1130 includes information on the changed band combination and / or information on the feature set corresponding to the changed band combination, the seventh information also includes information on the changed band combination and / or information on the feature set corresponding to the changed band combination.

[0447] Optionally, the content included in the seventh information is different from the content included in the second information. In other words, the second information in case 2 in S1130 includes information on the changed band combination and / or information on the feature set corresponding to the changed band combination. In this way, the primary access network device may determine information on the band combination currently supported by the terminal device based on the information on the changed band combination and the information on the band combination included in the initial capability of the terminal device. The primary access network device may determine information on the feature set corresponding to the band combination included in the current capability of the terminal device based on the information on the feature set of the changed band combination and the information on the feature set of the band included in the initial capability of the terminal device. The seventh information may include information on the band combination currently supported by the terminal device and the determined information on the feature set corresponding to the band combination included in the current capability of the terminal device.

[0448] Optionally, the primary access network device may obtain a second capability of the terminal device from the core network device. The second capability may be an initial capability of the terminal device. The primary access network device may then send the second capability of the terminal device to the secondary access network device. In this way, both the primary access network device and the secondary access network device can store the initial capability of the terminal device.

[0449] Optionally, if the primary access network device sends the seventh information to the secondary access network device, and the seventh information indicates (or includes) the current capability of the terminal device, this indicates that the capability used to configure the terminal device is determined based on the current capability of the terminal device. In other words, if the primary access network device sends the current capability of the terminal device to the secondary access network device, this indicates that the primary access network device and the secondary access network device need to determine the capability used to configure the terminal device based on the current capability of the terminal device. If the primary access network device sends the current capability of the terminal device to the secondary access network device, when the primary access network device and the secondary access network device subsequently perform capability negotiation to determine the capability used to configure the terminal device, the capability used to configure the terminal device is still determined based on the current capability of the terminal device. In other words, if the primary access network device transmits the current capabilities of the terminal device to the secondary access network device, the secondary access network device will consistently consider the current capabilities of the terminal device to be valid until the primary access network device instructs the secondary access network device to release the transmitted current capabilities of the terminal device (e.g., the primary access network device transmits a field indicating the current capabilities of the terminal device to the secondary access network device, but the content of the field is empty). In this case, the secondary access network device will not consider the current capabilities of the terminal device to be valid, and the capabilities used to configure the terminal device will no longer be determined based on the current capabilities of the terminal device.The primary access network device may store the initial capabilities of the terminal device and the current capabilities of the terminal device, and the secondary access network device may also store the initial capabilities of the terminal device and the current capabilities of the terminal device, so that when the primary access network device transmits the current capabilities of the terminal device to the secondary access network device and the current capabilities of the terminal device are valid, the secondary access network device may decide to determine the capabilities of the terminal device based on the current capabilities of the terminal device instead of the initial capabilities of the terminal device.

[0450] S1150: The primary access network device sends a second message to the secondary access network device, and the secondary access network device receives the second message. The second message indicates sixth information, and the sixth information indicates the first candidate capability information.

[0451] Optionally, the first candidate capability information includes an index of the candidate capability and an index of a feature set corresponding to the candidate capability. The candidate capability is a capability in the current capability of the terminal device. In other words, the primary access network device needs to send the candidate capability selected by the primary access network device from the current capability of the terminal device and the feature set corresponding to the candidate capability to the secondary access network device.

[0452] Optionally, the first candidate capability information is information about a candidate band combination, the information about the candidate band combination including an index of the candidate band combination and an index of a feature set corresponding to the candidate band combination. Optionally, the information about the candidate band combination may be information about a permitted band combination list, the information about the permitted band combination list including an index of one or more permitted band combinations and information about a permitted feature set list corresponding to the one or more permitted band combinations, the information about the permitted feature set list including an index of the one or more permitted feature sets.

[0453] Optionally, the first candidate capability information indicates an index of one or more candidate capabilities and an index of one or more feature sets corresponding to the one or more candidate capabilities. Alternatively, the first candidate capability information is information about an allowed band combination list, and the information about the allowed band combination list indicates an index of one or more allowed band combinations and an index of one or more allowed feature sets corresponding to the one or more allowed band combinations. The information about the allowed band combination list is selected by the primary access network to allow the secondary access network device to select a capability of the terminal device from the allowed band combination list.

[0454] Optionally, for case 1 in S1130, the primary access network device determines a candidate band combination from band combinations currently supported by the terminal device, and determines an index of the candidate band combination from an index of the band combination currently supported by the terminal device. The primary access network device determines a feature set corresponding to the candidate band combination from feature sets corresponding to the band combinations currently supported by the terminal device, and the primary access network device determines an index of the feature set corresponding to the candidate band combination from an index of the feature set corresponding to the band combination currently supported by the terminal device.

[0455] Optionally, for case 2 in S1130, the primary access network device needs to determine a band combination currently supported by the terminal device based on the changed band combination and the band combination corresponding to the initial capability of the terminal device. The primary access network device determines an index of the band combination currently supported by the terminal device based on an index of the changed band combination and an index of the band combination corresponding to the initial capability of the terminal device. The primary access network device may determine a candidate band combination from the determined band combination currently supported by the terminal device, and determine an index of the candidate band combination from the determined index of the band combination currently supported by the terminal device. The primary access network device determines a feature set of the band combination currently supported by the terminal device based on a feature set of the changed band combination of the terminal device and a feature set of the band combination corresponding to the initial capability of the terminal device. The primary access network device determines an index of the feature set corresponding to the band combination currently supported by the terminal device based on an index of the feature set of the changed band combination of the terminal device and an index of the feature set of the band combination corresponding to the initial capability of the terminal device. The primary access network device determines an index of the feature set corresponding to the candidate band combination from the determined index of the feature set corresponding to the band combination currently supported by the terminal device.

[0456] Optionally, the second message may be an inter-node message used by the primary access network device and the secondary access network device to negotiate to determine a third capability of the terminal device.

[0457] Optionally, S1140 and S1150 may be executed simultaneously or separately. The execution order of S1140 and S1150 is not limited in this embodiment of the present application. When S1140 and S1150 are executed simultaneously, the second message in S1150 may also include the seventh information in S1140.

[0458] S1160: The secondary access network device sends a response message for the second message to the primary access network device, and the primary access network device receives the response message, where the response message indicates a third capability, and the third capability is obtained based on the first candidate capability information.

[0459] In other words, the secondary access network device may select a third capability from the candidate capabilities indicated by the first candidate capability information and transmitted by the primary access network device, and select a feature set corresponding to the third capability from the feature sets corresponding to the candidate capabilities.

[0460] Optionally, after the secondary access network device receives the seventh information, if the seventh information includes the current capability of the terminal device, this indicates that the capability used to configure the terminal device is determined based on the current capability of the terminal device. In other words, if the primary access network device sends the current capability of the terminal device to the secondary access network device, this indicates that the primary access network device and the secondary access network device need to determine the capability of the terminal device based on the current capability of the terminal device. The secondary access network device may store the initial capability of the terminal device and the current capability of the terminal device, so that when the primary access network device sends the current capability of the terminal device to the secondary access network device, the secondary access network device may determine to determine the third capability of the terminal device based on the current capability of the terminal device instead of the initial capability of the terminal device.

[0461] Optionally, the secondary access network device determining the third capability of the terminal device based on the current capability of the terminal device may include: after receiving the first candidate capability information, the secondary access network device determining that an index of the candidate capability indicated by the first candidate capability information is an index in the index of the current capability of the terminal device, and that an index of a feature set corresponding to the candidate capability indicated by the first candidate capability information is an index of a feature set corresponding to the current capability of the terminal device. Thus, the secondary access network device selects the third capability from the candidate capabilities included in the current capability of the terminal device, and selects the feature set corresponding to the third capability from the feature set corresponding to the current capability based on the implementation manner of the secondary access network device.

[0462] Optionally, the response message may indicate an index of the third capability and an index of the feature set corresponding to the third capability.

[0463] Optionally, the first candidate capability information is information about a candidate band combination, and the information about the candidate band combination includes an index of the candidate band combination and an index of a feature set corresponding to the candidate band combination. Below, a description is provided with reference to two cases in S1130. The secondary access network device selects an index of a target band combination from the indexes of the candidate band combinations, and selects an index of a target feature set from the indexes of the feature sets corresponding to the selected target band combination. Optionally, the information about the candidate band combination may be information about an allowed band combination list, and the information about the allowed band combination list includes an index of one or more allowed band combinations and information about an allowed feature set list corresponding to the one or more allowed band combinations, and the information about the allowed feature set list includes an index of one or more allowed feature sets. The secondary access network device determines one "index of a selected band combination" from the indexes of one or more allowed band combinations, and determines one "index of a feature set" (which may also be referred to as "index of a selected feature set" or "index of a requested feature set") from the indexes of one or more allowed feature sets corresponding to the index of the selected band combination.

[0464] Optionally, for case 1 in S1130, the secondary access network device selects an index of a target band combination from the indexes of band combinations currently supported by the terminal device, and the secondary access network device determines a target feature set from the indexes of feature sets corresponding to the target band combination. The target band combination and the target feature set correspond to a third capability of the terminal device.

[0465] Optionally, for case 2 in S1130, the secondary access network device needs to determine a band combination currently supported by the terminal device based on the changed band combination of the terminal device and the band combination corresponding to the initial capability of the terminal device. The secondary access network device determines an index of the band combination currently supported by the terminal device based on an index of the changed band combination and an index of the band combination of the terminal device corresponding to the initial capability of the terminal device. The secondary access network device determines that an index of the candidate band combination is selected from the index of the band combination currently supported by the terminal device. The secondary access network device may select a target band combination from the candidate band combinations based on the implementation manner of the secondary access network device, and determine an index of the target band combination from the index of the candidate band combination. The secondary access network device determines a feature set of the band combination currently supported by the terminal device based on the feature set of the changed band combination of the terminal device and the feature set of the band combination corresponding to the initial capability of the terminal device. The secondary access network device determines that an index of the feature set corresponding to the candidate band combination is selected from the index of the feature set corresponding to the band combination currently supported by the terminal device. The secondary access network device determines an index of a feature set corresponding to a target band combination from the indexes of the feature sets corresponding to the candidate band combinations based on an implementation manner of the secondary access network device.

[0466] S1170: The primary access network device configures the terminal device based on a third capability.

[0467] Specifically, both the primary access network device and the secondary access network device configure the terminal based on the third capability determined through negotiation, and the primary access network device configures the configuration of the master cell group of the terminal device so that the common configuration of the master cell group and the secondary cell group of the terminal device does not exceed the current capability of the terminal device.

[0468] S1180: The secondary access network device configures the terminal device based on a third capability.

[0469] Specifically, both the primary access network device and the secondary access network device configure the terminal based on the third capability determined through negotiation, and the secondary access network device configures the configuration of the secondary cell group of the terminal device so that the common configuration of the master cell group and the secondary cell group of the terminal device does not exceed the current capability of the terminal device.

[0470] Optionally, the order of S1170 and S1180 is not limited, and S1170 may be performed before, after, or simultaneously with S1180.

[0471] In the method 1100, the primary access network device may send seventh information to the secondary access network device, where the seventh information indicates the current capability of the terminal device, and indicates that the primary access network device and the secondary access network device determine the capability of the terminal device based on the current capability of the terminal device. This implicit indication scheme can avoid signaling overhead.

[0472] The configuration method will now be described with reference to the method 1200 shown in Fig. 12. As shown in Fig. 12, the method 1200 includes the following steps:

[0473] S1210 to S1240 are the same as S1110 to S1140, respectively.

[0474] S1250: The primary access network device sends a second message to the secondary access network device, and the secondary access network device receives the second message. The second message includes a current capability of the terminal device. The second message further indicates sixth information, and the sixth information indicates the first candidate capability information.

[0475] Optionally, if the second message includes (or indicates) the current capability of the terminal device, this indicates that the capability used to configure the terminal device is determined based on the current capability of the terminal device. In other words, if the primary access network device transmits the current capability of the terminal device to the secondary access network device when transmitting the sixth information to the secondary access network device, this indicates that the primary access network device and the secondary access network device need to determine the capability used to configure the terminal device based on the current capability of the terminal device. If the primary access network device does not transmit the current capability of the terminal device when transmitting the sixth information to the secondary access network device, this indicates that the primary access network device and the secondary access network device do not determine the capability used to configure the terminal device based on the current capability of the terminal device. In other words, if the primary access network device and the secondary access network device perform capability negotiation and transmit the current capability of the terminal device, the secondary access network device currently considers that the current capability of the terminal device is valid. If the primary access network device and the secondary access network device perform capability negotiation but do not transmit the current capability of the terminal device, the secondary access network device currently does not consider that the current capability of the terminal device is valid and no longer determines the capability used to configure the terminal device based on the current capability of the terminal device. The primary access network device may store the initial capabilities of the terminal device, and the secondary access network device may also store the initial capabilities of the terminal device, so that when the primary access network device sends the current capabilities of the terminal device to the secondary access network device, the secondary access network device may decide to determine the capabilities of the terminal device based on the current capabilities of the terminal device instead of the initial capabilities of the terminal device.

[0476] Optionally, if the second message includes a current capability of the terminal device, the second message implicitly indicates the fifth information, where the fifth information indicates to determine the capability to be used to configure the terminal device based on the current capability of the terminal device.

[0477] Optionally, in S1240, the second message may include seventh information, where the seventh information indicates a current capability of the terminal device. In this manner, it may also be understood that the second message includes the current capability of the terminal device and implicitly indicates the fifth information, where the fifth information indicates determining the capability used to configure the terminal device based on the current capability of the terminal device.

[0478] Optionally, the second message may be an inter-node message used by the primary access network device and the secondary access network device to negotiate to determine a third capability of the terminal device.

[0479] For the first candidate capability information in S1250, please refer to the description in S1150. In order to avoid repetition, the details will not be described again.

[0480] S1260 to S1280 are the same as S1160 to S1180, respectively.

[0481] In method 1200, after the primary access network device indicates the current capabilities of the terminal device to the secondary access network device, the primary access network device may include the current capabilities of the terminal device in each second message sent to the secondary access network device to indicate that the capabilities used to configure the terminal device are determined based on the current capabilities of the terminal device instead of the initial capabilities of the terminal device.

[0482] The configuration method 1300 is described below with reference to Figure 13. The method 1300 includes the following steps.

[0483] S1310 to S1340 are the same as S1110 to S1140, respectively.

[0484] S1350: The primary access network device sends a second message to the secondary access network device, and the secondary access network device receives the second message, the second message includes a third field, and the information bits carried in the third field indicate a first candidate capability information. The third field indicates that the capability used to configure the terminal device is determined based on the current capability of the terminal device.

[0485] Optionally, the information bits carried in the third field indicate sixth information, the sixth information indicating the first candidate capability information.

[0486] Optionally, the third field indicates the fifth information, and the fifth information indicates that the capability used to configure the terminal device is determined based on the current capability of the terminal device. In other words, when the primary access network device transmits the second message to the secondary access network device, the third field indicating the first candidate capability information indicates that the capability used to configure the terminal device is determined based on the current capability of the terminal device. For example, if the second message carries the third field, this indicates that the capability used to configure the terminal device is determined based on the current capability of the terminal device. If the second message does not carry the third field, this indicates that the capability used to configure the terminal device is determined based on the initial capability of the terminal device. The secondary access network device determines whether or not to determine the capability used to configure the terminal device based on the current capability of the terminal device based on the third field. This implicit indication is used to determine the capability used to configure the terminal device based on the current capability of the terminal device, so that signaling overhead can be reduced.

[0487] S1360: The secondary access network device sends a response message of the second message to the primary access network device, where the response message indicates a third capability, the third capability being obtained based on the first candidate capability information.

[0488] In other words, the secondary access network device may select a third capability from the candidate capabilities indicated by the first candidate capability information and transmitted by the primary access network device, and select a feature set corresponding to the third capability from the feature sets corresponding to the candidate capabilities.

[0489] Optionally, the response message further indicates that the third capability is determined based on a current capability of the terminal device. Optionally, the response message further indicates fifth information, where the fifth information indicates that the third capability is determined based on a current capability of the terminal device.

[0490] Optionally, an information bit carried in a field included in the response message indicates that the third capability is determined based on a current capability of the terminal device.

[0491] Optionally, the response message includes a fourth field, and the information bit carried in the fourth field indicates a third capability, and the fourth field indicates that the third capability is determined based on the current capability of the terminal device. In other words, when the secondary access network device sends the response message of the second message to the primary access network device, the fourth field indicating the third capability indicates that the third capability used to configure the terminal device is determined based on the current capability of the terminal device. For example, if the response message of the second message carries the fourth field, this indicates that the third capability used to configure the terminal device is determined based on the current capability of the terminal device. If the response message of the second message does not carry the fourth field, this indicates that the third capability used to configure the terminal device is determined based on the initial capability of the terminal device. The primary access network device determines whether the secondary access network device determines the third capability used to configure the terminal device based on the current capability of the terminal device based on the fourth field. This implicit indication scheme can reduce signaling overhead.

[0492] It should be noted that in S1360, for how the secondary access network device determines the third capability based on the first candidate capability information, please refer to the description of S1160. In order to avoid repetition, the details will not be described again.

[0493] S1370 to S1380 are the same as S1170 to S1180, respectively.

[0494] In the method 1300, when indicating the first candidate capability information to the secondary access network device, the primary access network device may indicate to determine the capability to be used to configure the terminal device based on the current capability of the terminal device instead of the initial capability of the terminal device based on the position of the third field carrying the first candidate capability information. This implicit indication scheme can reduce signaling overhead.

[0495] The configuration method 1400 will now be described with reference to Fig. 14. As shown in Fig. 14, the method 1400 includes the following steps:

[0496] S1410 to S1440 are the same as S1110 to S1140, respectively.

[0497] S1450: The primary access network device sends a second message to the secondary access network device, and the secondary access network device receives the second message, the second message includes a second field, and the information bits carried in the second field indicate determining a capability to be used to configure the terminal device based on a current capability of the terminal device. The second message indicates the first candidate capability information.

[0498] Optionally, the information bits carried in the second field indicate fifth information, the fifth information indicating determining a capability to be used to configure the terminal device based on a current capability of the terminal device.

[0499] Optionally, the length of the second field is 1 bit. For example, if the information bit of the second field is 1, this indicates that the capability used to configure the terminal device is determined based on the current capability of the terminal device, and if the information bit of the second field is 0, this indicates that the capability used to configure the terminal device is determined based on the initial capability of the terminal device.

[0500] Optionally, the second message includes a fifth field, where information bits carried in the fifth field indicate the first candidate capability information.

[0501] Optionally, the second message includes a fifth field, and information bits carried in the fifth field indicate sixth information, and the sixth information indicates the first candidate capability information.

[0502] S1460 to S1480 are the same as S1160 to S1180, respectively.

[0503] In method 1400, when sending the second message to the secondary access network device, the primary access network device may indicate, based on information bits carried in a second field in the second message, to determine the capabilities to be used to configure the terminal device based on the current capabilities of the terminal device.

[0504] In methods 1100 to 1400, it is described that four different schemes are used to indicate that the capabilities used to configure the terminal device are determined based on the current capabilities of the terminal device.

[0505] In the above method embodiment, the second information sent by the terminal device indicating the current capability of the terminal device may be used as an independent embodiment. Hereinafter, a method 1500 for sending the current capability of the terminal device by a terminal device is described with reference to the method 1500 in Fig. 15. As shown in Fig. 15, the method 1500 includes the following steps:

[0506] S1510: The terminal device sends second information to the access network device, where the second information indicates a current capability of the terminal device.

[0507] The current capabilities of the terminal device may include the capabilities of the terminal device related to a single carrier and / or the capabilities related to the primary cell in which the terminal device is currently located.

[0508] For the description of S1510, please refer to the description of S530, and in order to avoid repetition, the details will not be described.

[0509] Optionally, before S1510, the method 1500 includes: the access network device sends eighth information to the terminal device, where the eighth information indicates that the terminal device is permitted to send the current capabilities of the terminal device. In other words, when the access network device permits the terminal device to send the current capabilities of the terminal device, the terminal device may execute S1510.

[0510] S1520: The access network device sends a second configuration to the terminal device based on the second information.

[0511] Optionally, the access network device may determine a current capability of the terminal device based on the second information, and determine a second configuration used to configure the terminal device based on the current capability of the terminal device. In this way, the terminal device may perform data transmission with the access network device based on the second configuration.

[0512] For example, the second information sent by the terminal device may indicate that the maximum bandwidth currently supported by the terminal device is 100M, and the access network device may determine that the bandwidth used by the terminal device is 80M based on the maximum bandwidth of 100M supported by the terminal device. In this case, the second configuration sent by the access network device to the terminal device may configure the terminal device to use a bandwidth of 80M. In other words, the second configuration is determined based on the maximum bandwidth of 100M supported by the terminal device.

[0513] Optionally, the access network device in method 1500 may be replaced with the primary access network device in the above methods 1100 to 1400.

[0514] In the above method 1500, the second information sent by the terminal device to the access network device may indicate a current capability of the terminal device. The current capability of the terminal device includes a single carrier-related capability of the terminal device and / or a capability related to a primary cell in which the terminal device is currently located. The second information does not indicate a single carrier-related capability of the terminal device, nor does it indicate a capability related to a primary cell in which the terminal device is currently located, so that signaling overhead can be reduced.

[0515] Another method 1600 for transmitting a current capability of a terminal device by a terminal device is described below with reference to the method 1600 in Figure 16. As shown in Figure 16, the method 1600 includes the following steps.

[0516] S1610: The access network device sends first filtering information to the terminal device, and the terminal device receives the first filtering information.

[0517] Optionally, the method 1600 includes: the access network device sends eighth information to the terminal device, where the eighth information indicates that the terminal device is permitted to send the current capabilities of the terminal device. In other words, when the access network device permits the terminal device to send the current capabilities of the terminal device, the terminal device may perform S1620.

[0518] For a description of the first filtering information, please refer to the description of the method 500. To avoid repetition, details will not be described.

[0519] Optionally, the access network device may send both the first filtering information and the eighth information to the terminal device, or may send the first filtering information and the eighth information to the terminal device separately, which is not limited in this embodiment of the application.

[0520] S1620: The terminal device sends second information to the access network device based on the first filtering information, and the access network device receives the second information, where the second information indicates a current capability of the terminal device.

[0521] Optionally, after determining the current capability of the terminal device based on the first filtering information, the terminal device may also transmit the first filtering information when transmitting the second information, where the second information corresponds to the first filtering information and indicates that the current capability of the terminal device indicated by the second information is obtained based on the first filtering information.

[0522] S1630: The access network device sends a second configuration to the terminal device based on the second information.

[0523] For S1630, please refer to the description of S1520. To avoid repetition, details will not be described.

[0524] Optionally, the access network device in method 1600 may be replaced with the primary access network device in the above methods 1100 to 1400.

[0525] In the above method 1600, the second information sent by the terminal device to the access network device may indicate a current capability of the terminal device, where the current capability of the terminal device is a capability obtained based on the first filtering information, and the second information does not indicate a capability not related to the first filtering information, so that signaling overhead can be reduced.

[0526] Optionally, the capability of the terminal device referred to in this embodiment of this application may be the air interface capability of the terminal device. For example, the first capability, the second capability, the initial capability, the current capability, the temporary capability or the currently used capability may be the air interface capability of the terminal device.

[0527] Optionally, the “current capability” in this embodiment of the application may be replaced with “temporary capability” or may be replaced with “updated capability.” Alternatively, the “current capability” is a capability that is different from the “initial capability” stored in the core network device and is a capability that is stored only in the access network device.

[0528] Optionally, in this embodiment of the application, the second information sent by the terminal device includes a correspondence between the band combinations currently supported by the terminal device and the indexes of the band combinations currently supported by the terminal device. This may be replaced as follows: The second information sent by the terminal device includes the band combinations currently supported by the terminal device, and different positions of the band combinations in the second information may implicitly indicate the indexes of the band combinations. In other words, the indexes of the band combinations may also be implicitly indicated without being explicitly indicated.

[0529] The above describes the method embodiment provided in this application, and the following describes the device embodiment provided in this application. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, for the contents that are not described in detail, refer to the above method embodiment. For the sake of brevity, the details will not be described again here.

[0530] 17 illustrates a communication device 1700 according to an embodiment of the present application. The communication device 1700 includes a processor 1710 and a transceiver 1720. The processor 1710 and the transceiver 1720 communicate with each other through an internal connection path. The processor 1710 is configured to execute instructions to control the transceiver 1720 to transmit signals and / or receive signals.

[0531] Optionally, the communication device 1700 may further include a memory 1730. The memory 1730 communicates with the processor 1710 and the transceiver 1720 through an internal connection path. The memory 1730 may be configured to store instructions, and the processor 1710 may execute the instructions stored in the memory 1730. In a possible implementation manner, the communication device 1700 is configured to implement procedures and steps corresponding to the terminal device in the above method embodiment. In another possible implementation manner, the communication device 1700 is configured to implement procedures and steps corresponding to the access network device in the above method embodiment. In another possible implementation manner, the communication device 1700 is configured to implement procedures and steps corresponding to the primary access network device in the above method embodiment. In another possible implementation manner, the communication device 1700 is configured to implement procedures and steps corresponding to the secondary access network device in the above method embodiment.

[0532] It should be understood that the communication device 1700 may specifically be a terminal device, an access network device, a primary access network device, or a secondary access network device in the above embodiments, or may be a chip or a chip system. Correspondingly, the transceiver 1720 may be a transceiver circuit of a chip. This is not limited here. Specifically, the communication device 1700 may be configured to execute steps and / or procedures corresponding to the terminal device, the access network device, the primary access network device, or the secondary access network device in the above method embodiments. Optionally, the memory 1730 may include a read-only memory and a random access memory, and provide instructions and data to the processor. Part of the memory may further include a non-volatile random access memory. For example, the memory may further store device type information. The processor 1710 may be configured to execute instructions stored in the memory. When the processor 1710 executes instructions stored in the memory, the processor 1710 is configured to execute steps and / or procedures of the method embodiments corresponding to the terminal device, the access network device, the primary access network device, or the secondary access network device.

[0533] In the implementation process, the steps in the above method may be realized by using hardware integrated logic circuits in a processor, or by using instructions in the form of software. The steps of the method disclosed with reference to the embodiments of this application may be directly executed and completed by a hardware processor, or may be executed and completed by using a combination of hardware and software modules in a processor. The software modules may be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, or a register. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps in the above method in combination with the hardware of the processor. In order to avoid repetition, the details will not be described again here.

[0534] It should be noted that the processor in the embodiments of this application may be an integrated circuit chip and have signal processing capabilities. In the realization process, the steps in the above method embodiments may be realized by using hardware integrated logic circuits in the processor, or by using instructions in the form of software. The processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. It may realize or execute the method, steps and logical block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc. The steps of the method disclosed with reference to the embodiments of this application may be directly executed and completed by a hardware decoding processor, or may be executed and completed by using a combination of hardware and software modules in the decoding processor. The software modules may be located in mature storage media in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps in the above method in combination with the processor's hardware.

[0535] It may be understood that the memory in the embodiments of this application may be volatile memory or non-volatile memory, or may include volatile memory and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM) or flash memory. The volatile memory may be random access memory (RAM) used as an external cache. By way of example, and not limitation, many types of RAM may be used, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus dynamic random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein includes, but is not limited to, these and any other suitable types of memory.

[0536] According to the method provided in the embodiment of this application, this application further provides a computer program product, which includes computer program code, which, when executed on a computer, causes the computer to perform the steps or procedures performed by the terminal device, the access network device, the primary access network device or the secondary access network device in the above embodiment of the method.

[0537] According to the method provided in the embodiment of this application, this application further provides a computer-readable storage medium, which stores a program code, and when the program code is executed on a computer, the computer executes the steps or procedures executed by the terminal device, the access network device, the primary access network device or the secondary access network device in the above embodiment of the method.

[0538] According to the method provided in the embodiment of this application, this application further provides a communication system, which includes one or more terminal devices as described above and one or more access network devices, or includes one or more terminal devices as described above, one or more primary access network devices, and one or more secondary access network devices.

[0539] The above device embodiments fully correspond to the method embodiments, and the corresponding modules or units perform the corresponding steps. For example, a communication unit (transceiver) may perform a receiving step or a transmitting step in the method embodiments, and a processing unit (processor) may perform steps other than a transmitting step and a receiving step. The function of a specific unit may be based on the corresponding method embodiment. There may be one or more processors.

[0540] In this application, "indication" may include direct indication and indirect indication, or may include explicit indication and implicit indication. Information indicated by specific information is called information to be indicated. In a specific realization process, information to be indicated may be indicated in many ways. For example, without limitation, information to be indicated may be directly indicated, for example, information to be indicated or an index of information to be indicated is indicated. Alternatively, information to be indicated may be indirectly indicated by indicating other information, and there is an association relationship between the other information and the information to be indicated. Alternatively, only a part of information to be indicated may be indicated, and other parts of information to be indicated are known or agreed upon in advance. For example, specific information may alternatively be indicated by using a pre-agreed (e.g., specified in a protocol) arrangement order of multiple pieces of information to reduce indication overhead to a certain extent.

[0541] In the embodiments of this application, the terms and English abbreviations are all examples given for ease of explanation and should not constitute any limitation to this application. This application does not exclude the possibility of defining other terms that can achieve the same or similar functions in existing or future protocols.

[0542] It should be understood that "and / or" in this specification describes an association relationship between related objects and represents that three relationships may exist. For example, A and / or B may represent the following three cases: only A is present, both A and B are present, and only B is present. A and B may be singular or plural. The character " / " generally indicates an "or" relationship between related objects.

[0543] Those skilled in the art may recognize that, in combination with the illustrative logical blocks described in the embodiments disclosed in this specification, the steps may be realized by electronic hardware or a combination of computer software and electronic hardware. Whether a function is performed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to realize the described functions for each specific application, but the implementation manner should not be considered to go beyond the scope of this application.

[0544] For the purpose of convenient and concise description, the detailed operation processes of the above systems, devices and units can be clearly understood by those skilled in the art by referring to the corresponding processes in the above method embodiments, and the details will not be described again here.

[0545] In some embodiments provided in this application, it should be understood that the disclosed system, device, and method may be realized in other ways. For example, the described device embodiment is merely an example. For example, the division into units is merely a logical division of functions, and may be divided in other ways in actual implementation. For example, multiple units or components may be combined or integrated into other systems, or some features may be ignored or not implemented. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be realized by using some interfaces. Indirect couplings or communication connections between devices or units may be realized in electronic, mechanical, or other forms.

[0546] The units described as separate parts may or may not be physically separate, and the parts shown as units may or may not be physical units, and may be located in one place or distributed over multiple network units. Some or all of the units may be selected based on actual requirements to achieve the objectives of the solutions of the embodiments.

[0547] Furthermore, the functional units in the embodiments of this application may be integrated into one processing unit, or each of the units may exist physically alone, or two or more units may be integrated into one unit.

[0548] In the above embodiments, all or part of the functions of the functional units may be realized by using software, hardware, firmware, or any combination thereof. When software is used to realize the embodiments, all or part of the embodiments may be realized in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded into a computer and executed, the procedures or functions according to the embodiments of this application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or may be transmitted from a 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 to another website, computer, server, or data center in a wired (e.g., coaxial cable, optical fiber, or digital subscriber line (DSL)) or wireless (e.g., infrared, radio, microwave, etc.) manner. The computer-readable storage medium may be any available medium accessible by a computer, or a data storage device integrating one or more available media, such as a server or a data center. The available media may be magnetic media (eg, floppy disk, hard disk, or magnetic tape), optical media (eg, DVD), semiconductor media (eg, solid state disk, SSD), and the like.

[0549] When the functions are realized in the form of a software functional unit and sold or used as an independent product, the functions may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of this application may be essentially realized in the form of a software product, or the part of the technical solutions or the part of the contribution to the prior art may be realized in the form of a software product. The computer software product is stored in a storage medium and includes some instructions for instructing a computer device (which may be a personal computer, a server or a network device) to execute all or part of the steps of the method described in the embodiments of this application. The above storage medium includes any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0550] The above description is merely a specific embodiment of this application, and is not intended to limit the scope of protection of this application. Any variations or replacements that are easily conceived by those skilled in the art within the technical scope disclosed in this application shall fall within the scope of protection of this application. Therefore, the scope of protection of this application shall be subject to the scope of protection of the claims.

Claims

1. A configuration method applied to a terminal device, comprising: sending first information to an access network device, the first information indicating reducing a capability of the terminal device; receiving a first configuration from the access network device, a first capability of the terminal device corresponding to the first configuration being lower than a second capability of the terminal device; The method includes:

2. The method of claim 1 , wherein the second capability is a capability stored in a core network device.

3. prior to transmitting the first information to the access network device; determining that a current capability of the terminal device is lower than the second capability; The method of claim 1 or 2, further comprising:

4. receiving a system message broadcast by the access network device, the system message including third information, the third information indicating that the terminal device is authorized to send an instruction to reduce the capability of the terminal device; The method of claim 1 , further comprising:

5. The method according to claim 1 , wherein the first capability of the terminal device corresponding to the first configuration includes allowing the terminal device to transmit the current capabilities.

6. A configuration method applied to a terminal device, comprising: receiving a third configuration of the terminal device from an access network device; indicating to the access network device that a capability of the terminal device corresponding to the third configuration of the terminal device exceeds a current capability of the terminal device; The method includes:

7. The step of indicating to the access network device that a capability of the terminal device corresponding to the third configuration of the terminal device exceeds a current capability of the terminal device, indicating, by the terminal device, to the access network device that the capabilities of the terminal device corresponding to the third configuration of the terminal device exceed the current capabilities of the terminal device when a current configuration is left unchanged. The method of claim 6, comprising:

8. The method according to claim 6 or 7, wherein the capabilities of the terminal device corresponding to the third configuration are capabilities stored in a core network device.

9. The step of indicating to the access network device that a capability of the terminal device corresponding to the third configuration of the terminal device exceeds a current capability of the terminal device, sending a first message to the access network device, the first message including a first field, and information bits carried in the first field indicating that the capabilities of the terminal device corresponding to the third configuration of the terminal device exceed the current capabilities of the terminal device; or transmitting, by the terminal device, second information to the access network device, the second information indicating the current capabilities of the terminal device; 9. The method of any one of claims 6 to 8, comprising:

10. The method of claim 6 , wherein the capabilities of the terminal device corresponding to the third configuration include allowing the terminal device to transmit its current capabilities.

11. transmitting second information to the access network device, the second information indicating the current capabilities of the terminal device; receiving a second configuration from the access network device, the second configuration being determined based on the current capabilities of the terminal device; The method of claim 5 or 10, further comprising:

12. receiving first filtering information from the access network device; The step of transmitting the second information to the access network device includes: sending the second information to the access network device based on the first filtering information, the current capability of the terminal device indicated by the second information being a capability related to the first filtering information; The method of claim 11 , comprising:

13. The method of claim 12 , wherein the current capabilities of the terminal device include capabilities of the terminal device related to a single carrier and / or capabilities related to a primary cell in which the terminal device is currently located.

14. The second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations; or 14. The method according to claim 11, wherein the second information includes information about a changed band combination and information about a feature set corresponding to the changed band combination, the changed band combination being a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to a second capability.

15. 1. A configuration method applied to an access network device, comprising: receiving first information, the first information indicating reducing a capability of a terminal device; transmitting a first configuration, a first capability of the terminal device corresponding to the first configuration being lower than a second capability of the terminal device; The method includes:

16. The method of claim 15 , wherein the second capabilities are capabilities stored in a core network device.

17. broadcasting a system message, the system message including third information, the third information indicating that the terminal device is authorized to send an instruction to reduce the capability of the terminal device; 17. The method of claim 15 or 16, further comprising:

18. 18. The method of claim 15, wherein the capabilities of the terminal device corresponding to the first configuration include allowing transmission of current capabilities of the terminal device.

19. 1. A configuration method applied to an access network device, comprising: transmitting a third configuration of the terminal device to the terminal device; learning from the terminal device that a capability of the terminal device corresponding to the third configuration of the terminal device exceeds a current capability of the terminal device; The method includes:

20. 20. The method of claim 19, wherein the capabilities of the terminal device corresponding to the third configuration are capabilities stored in a core network device.

21. The step of learning from the terminal device that a capability of the terminal device corresponding to the third configuration of the terminal device exceeds a current capability of the terminal device, receiving a first message from the terminal device, the first message including a first field, and information bits carried in the first field indicating that the capabilities of the terminal device corresponding to the third configuration of the terminal device exceed the current capabilities of the terminal device; or receiving second information from the terminal device, the second information indicating the current capabilities of the terminal device; 21. The method of claim 19 or 20, comprising:

22. 21. The method of claim 19 or 20, wherein the capabilities of the terminal device corresponding to the third configuration include allowing the terminal device to transmit the current capabilities.

23. receiving second information from the terminal device, the second information indicating the current capabilities of the terminal device; transmitting a second configuration to the terminal device, the second configuration being determined based on the current capabilities of the terminal device; 23. The method of claim 18 or 22, further comprising:

24. transmitting first filtering information to the terminal device, the current capabilities of the terminal device indicated by the second information being capabilities related to the first filtering information; 24. The method of claim 23, further comprising:

25. The method of claim 23, wherein the current capabilities of the terminal device include capabilities of the terminal device related to a single carrier and / or capabilities related to a primary cell in which the terminal device is currently located.

26. The second information includes information about band combinations currently supported by the terminal device and information about feature sets corresponding to the band combinations; or 26. The method of claim 23, wherein the second information includes information about a changed band combination and information about a feature set corresponding to the changed band combination, the changed band combination being a band combination changed by comparing a band combination currently supported by the terminal device with a band combination corresponding to a second capability.

27. 1. An electronic device including a processor, An electronic device, the processor coupled to a memory, the processor configured to execute computer programs or instructions stored in the memory, such that the electronic device is capable of implementing a method according to any one of claims 1 to 26.

28. 1. A computer-readable storage medium, comprising:

27. A computer readable storage medium storing computer instructions which, when executed on an electronic device, enable the electronic device to perform a method according to any one of claims 1 to 26.

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