Communication method and device

Abstract

The embodiments of the present application provide a communication method and apparatus, in which a network device indicates a band and / or carrier before switching of a terminal device and a band and / or carrier after switching of the terminal device, so that the terminal device can clearly obtain a specific band and / or carrier to be preempted, and can be switched to a target frequency band and / or carrier, thereby avoiding the problem of reconfiguring a band corresponding to a channel of the terminal device, reducing the processing delay of the terminal device, and improving the data transmission performance.

Description

[Technical field]

[0001] TECHNICAL FIELD Embodiments of the present application relate to the field of communications, and more particularly, to communication methods and apparatus. [Background technology]

[0002] Currently, when a terminal device is switched to a different state, the following scenario may occur: for example, the state in which the terminal device transmits a radio frequency chain in slot #1 is state #1 (e.g., state #1 is such that band #A is used on channel #1 and band #2 is used on channel #2), and two downlink control information (DCI) may be received in slot #2 indicating the bands to be used when the terminal device is switched to state #2 (e.g., DCI #1 instructs to use band #A and DCI #2 instructs to use band #C).

[0003] The terminal device cannot process two pieces of downlink control information at the same time. Therefore, for example, the terminal device may first process the first downlink control information and then process the second control information. In this case, the terminal device may refer to the state #1 before switching by default to determine the band indicated by the corresponding downlink control information. For example, the terminal device still uses band #A on channel #1 and band #C on channel #2, and starts to set channel parameters. However, channel #2 of the terminal device may not support band #C. In this case, the terminal device needs to cancel the previously set channel parameters and reconfigure the channel parameters. Therefore, the processing delay of the terminal device is prolonged. Therefore, a method for avoiding the reconfiguration of the band corresponding to the channel and shortening the processing delay of the terminal device is an issue that needs to be urgently solved. Summary of the Invention

[0004] The embodiments of the present application provide a communication method and apparatus, in which a network device indicates a band and / or carrier before switching of a terminal device and a band and / or carrier after switching of the terminal device, so that the terminal device can clearly obtain a specific band and / or carrier to be interrupted and can be switched to a target frequency band and / or carrier. This avoids the problem of reconfiguring a band corresponding to a channel of the terminal device, reduces the processing delay of the terminal device, and improves the data transmission performance.

[0005] According to a first aspect, a communication method is provided. The method may be performed by a terminal device (e.g., a user equipment) or may be performed by a component (e.g., a chip or a circuit) of the terminal device. This is not limited herein.

[0006] The method includes: the terminal device receiving first information from the network device, the first information including N information blocks, the N information blocks including a jth information block, the jth information block including a first field, the first field indicating a post-switching band and / or carrier of the terminal device, the jth information block being associated with a pre-switching band and / or carrier of the terminal device, where N is a positive integer; and the terminal device transmitting uplink data on the post-switching band and / or carrier based on the first information.

[0007] In the present application, it should be understood that "the j-th information block is associated with the band and / or carrier before switching of the terminal device" can also be understood as meaning that the network device can set the correspondence between the N information blocks and the band and / or carrier for the terminal device by using RRC signaling, or that the correspondence between the N information blocks and the band and / or carrier is predefined. For example, the correspondence between the positions of the N information blocks and the N bands and / or carriers before switching is predefined.

[0008] In this application, the "band and / or carrier before switching" may also be understood as the band and / or carrier currently used by the terminal device, or as the "source band and / or carrier", and the "band and / or carrier after switching" may also be understood as the "target band and / or carrier".

[0009] In this application, a "field" as referred to may indicate various contents, or information (e.g., bits) carried in the field may be understood to indicate the corresponding contents. A "field" in this application may also be understood as "identification information."

[0010] In other words, the above technical solution can also be understood as follows: a terminal device receives first information from a network device, the first information includes N information blocks, the terminal device determines a first information block from the N information blocks, the first information block includes a first identifier, the first identifier indicates a target band and / or carrier, the terminal device determines a source band and / or carrier based on a position of the first information block among the N information blocks, and the terminal device is switched from the source band and / or carrier to the target band and / or carrier.

[0011] Based on the above technical solution, in this application, each information block in the first information can be implicitly associated with the band and / or carrier before switching of the terminal device, and the first field in each information block can indicate the band and / or carrier after switching, so that the terminal device determines the specific band / carrier to be interrupted and is switched to the target frequency band / carrier. This avoids the problem of resetting the band corresponding to the channel of the terminal device, reduces the processing delay of the terminal device, and improves the data transmission performance.

[0012] In a possible implementation, the jth information block further includes a second field, which indicates a time offset between the first information and the uplink data scheduled by the first information, and the uplink data is transmitted on the band and / or carrier after switching.

[0013] In this application, a "time offset" may alternatively be a slot offset or a symbol offset, or may be a slot offset and a symbol offset.

[0014] In this application, "uplink data" may also be understood as the uplink data being located in the switched band and / or carrier, i.e., the terminal device may transmit the uplink data in the switched band and / or carrier.

[0015] Based on the above technical solution, in this application, the terminal device can use the first information to determine a specific slot or a specific symbol in which uplink data is transmitted by using a band / carrier after switching, so that after completing switching between states, the terminal device receives data in a specific slot according to the indication of the second field, thereby preventing the terminal device from receiving data before completing switching between states, thereby improving data transmission performance.

[0016] In a possible implementation, the method further includes: the terminal device transmitting sixth information to the network device, the sixth information being used by the network device to determine the first information, where the sixth information includes a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being one in which the terminal device supports a first number of radio frequency chains transmitted within a band of a first band group, and the second state being one in which the terminal device supports a band of a second band group. the sixth information includes at least a switching delay of switching of the terminal device between the first state and the second state, the first state being that the terminal device supports a first number of radio frequency chains transmitted in bands of the first band group and the second state being that the terminal device supports a second number of radio frequency chains transmitted in bands of the second band group; and / or the sixth information includes at least a switching correspondence between bands in the case of switching of the terminal device from the at least one first band to the at least one second band.

[0017] In the present application, a "band of the first band group" may also be understood as at least one first band, and a "band of the second band group" may also be understood as at least one second band, where the first state may be understood as the terminal device supporting a first number of radio frequency chains transmitted in at least one first band, and the second state may be understood as the terminal device supporting a second number of radio frequency chains transmitted in at least one second band.

[0018] In this application, the inter-band switching correspondence when a terminal device is switched from at least one first band to at least one second band may be understood as a switching of the terminal device from a first first band to a first second band, specifically, it may be understood as a corresponding switching from a first first band to a first second band, a corresponding switching from a second first band to a second second band, etc.

[0019] In the present application, a terminal device reporting a switching delay between a first state and a second state can be understood as the terminal device being able to perform switching between the first state and the second state, i.e., implicitly indicating a switching correspondence between the first state and the second state.

[0020] Based on the above technical solution, in this application, the terminal device can report to the network device the bands supported by each channel, or the corresponding switching correspondence between bands when switching is performed between states, so that the network device can clearly indicate the specific band that the terminal device needs to switch to the target band. This avoids the problem of reconfiguring the band corresponding to the channel of the terminal device, reduces the processing delay of the terminal device, and improves the data transmission performance. In addition, the terminal device can further report the switching delay required for switching between states, so that the network device can determine the scheduled uplink data.

[0021] According to a second aspect, a communication method is provided. The method may be performed by a terminal device (e.g., a user equipment) or may be performed by a component (e.g., a chip or a circuit) of the terminal device. This is not limited herein.

[0022] The method includes: the terminal device receiving second information from the network device, the second information including M information blocks, a k-th information block among the M information blocks being associated with a band pair of the terminal device, the band pair including a pre-switching band of the terminal device and a post-switching band of the terminal device, where M is a positive integer; and the terminal device transmitting uplink data in the post-switching band based on the second information.

[0023] The above technical solution may also be understood as follows: a terminal device receives second information from a network device, the second information includes M information blocks, the terminal device determines a first information block from the M information blocks, the terminal device determines a band pair based on a position of the first information block among the M information blocks, and the terminal device switches from the source band to the target band based on the determined band pair. For example, each of the M information blocks may correspond to an index of one band pair. For example, the first information block corresponds to band pair #1, and the second information block corresponds to band pair #2. The correspondence between the band pair and each of the M information blocks may be transmitted by the network device to the terminal device by using RRC signaling, or may be predefined. For example, the network device may set the correspondence between the position of each of the M information blocks and the band pair to the terminal device by using RRC signaling.

[0024] Based on the above technical solution, in this application, each information block in the second information can be implicitly associated with a band pair, i.e., a band before switching and a band after switching, so that the terminal device determines a specific band / carrier to be interrupted and switches to a target frequency band / carrier. This avoids the problem of resetting the band corresponding to the channel of the terminal device, reduces the processing delay of the terminal device, and improves the data transmission performance.

[0025] In a possible implementation, the k-th information block further includes a third field, which indicates a carrier after switching of the terminal device.

[0026] Based on the above technical solution, in this application, each information block in the second information can further indicate the carrier after switching.In other words, the terminal device can determine the carrier to which a specific band is switched, thereby reducing the processing time of the terminal device and improving data transmission performance.

[0027] In a possible implementation, the kth information block includes a second field, which indicates a time offset between the second information and uplink data scheduled by the second information, and the uplink data is transmitted on a band or carrier after switching.

[0028] Based on the above technical solution, in this application, the terminal device can use the second information to determine a specific slot or a specific symbol in which uplink data is transmitted by using the band / carrier after switching, so that after completing switching between states, the terminal device receives data in a specific slot according to the indication of the second field. This can avoid the terminal device receiving data before completing switching between states, thereby improving data transmission performance.

[0029] In a possible implementation, the method further includes: the terminal device transmitting sixth information to the network device, the sixth information being used by the network device to determine the second information, where the sixth information includes a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being one in which the terminal device supports a first number of radio frequency chains transmitted within a band of a first band group, and the second state being one in which the terminal device supports a band of a second band group. the sixth information includes at least a switching delay of switching of the terminal device between the first state and the second state, the first state being that the terminal device supports a first number of radio frequency chains transmitted in bands of the first band group and the second state being that the terminal device supports a second number of radio frequency chains transmitted in bands of the second band group; and / or the sixth information includes at least a switching correspondence between bands in the case of switching of the terminal device from the at least one first band to the at least one second band.

[0030] Based on the above technical solution, in this application, the terminal device can report to the network device the bands supported by each channel, or the corresponding switching correspondence between bands when switching is performed between states, so that the network device can clearly indicate the specific band that the terminal device needs to switch to the target band. This avoids the problem of reconfiguring the band corresponding to the channel of the terminal device, reduces the processing delay of the terminal device, and improves the data transmission performance. In addition, the terminal device can further report the switching delay required for switching between states, so that the network device can determine the scheduled uplink data.

[0031] According to a third aspect, a communication method is provided. The method may be performed by a terminal device (e.g., a user equipment) or may be performed by a component (e.g., a chip or a circuit) of the terminal device. This is not limited herein.

[0032] The method includes: the terminal device receiving third information from the network device, the third information including a first field, the first field indicating a band and / or carrier after switching of the terminal device, the band and / or carrier before switching being determined by the terminal device according to a preset rule or the band and / or carrier before switching being indicated by the network device; and the terminal device transmitting data on the band and / or carrier after switching based on the third information.

[0033] Based on the above technical solution, in this application, the third information can explicitly indicate the band and / or carrier after switching, and can also explicitly or implicitly indicate the band and / or carrier before switching, so that the terminal device determines the specific band / carrier to be interrupted and is switched to the target frequency band / carrier, thereby avoiding the problem of resetting the band corresponding to the channel of the terminal device, reducing the processing delay of the terminal device, and improving the data transmission performance.

[0034] In a possible implementation, the third information further includes a second field, the second field indicating a time offset between the third information and the uplink data scheduled by the third information, the data being transmitted on the band and / or carrier after switching.

[0035] Based on the above technical solution, in this application, the terminal device can use the third information to determine a specific slot or a specific symbol in which uplink data is transmitted by using the band / carrier after switching, so that after completing switching between states, the terminal device receives data in a specific slot according to the indication of the second field. This can avoid the terminal device receiving data before completing switching between states, thereby improving data transmission performance.

[0036] In a possible implementation, the third information further includes a fourth field, the fourth field indicating the second table in which the time offset is located, or the fourth field indicating the position or index of the time offset in the first table.

[0037] Based on the above technical solution, in this application, a network device can indicate the position of a time offset, and a terminal device can determine the slot in which data is transmitted based on the instruction of the network device.

[0038] In a possible implementation, the method further includes: the terminal device transmitting sixth information to the network device, the sixth information being used by the network device to determine the second information, where the sixth information includes a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being one in which the terminal device supports a first number of radio frequency chains transmitted within a band of a first band group, and the second state being one in which the terminal device supports a band of a second band group. the sixth information includes at least a switching delay of switching of the terminal device between the first state and the second state, the first state being that the terminal device supports a first number of radio frequency chains transmitted in bands of the first band group and the second state being that the terminal device supports a second number of radio frequency chains transmitted in bands of the second band group; and / or the sixth information includes at least a switching correspondence between bands in the case of switching of the terminal device from the at least one first band to the at least one second band.

[0039] Based on the above technical solution, in this application, the terminal device can report to the network device the bands supported by each channel, or the corresponding switching correspondence between bands when switching is performed between states, so that the network device can clearly indicate the specific band that the terminal device needs to switch to the target band, thereby avoiding the problem of reconfiguring the band corresponding to the channel of the terminal device, reducing the processing delay of the terminal device, and improving the data transmission performance.

[0040] According to a fourth aspect, a communication method is provided. The method may be performed by a terminal device (e.g., a user equipment) or may be performed by a component (e.g., a chip or a circuit) of the terminal device. This is not limited herein.

[0041] The method includes: the terminal device receives fourth information from the network device, the fourth information includes a fifth field, the fifth field indicates a first band after switching of the terminal device, the fourth information further includes a sixth field, the sixth field instructs the terminal device to receive the fifth information, the fifth information indicates a second band after switching of the terminal device. The terminal device transmits uplink data in the band after switching based on the fourth information and the fifth information. Alternatively, the fourth information further includes a seventh field, the seventh field indicates a lag time for the fifth field to take effect. The terminal device transmits uplink data in the band after switching based on the fourth information.

[0042] In this application, a "lag time" may also be understood as a "time window," a "period," or a "time offset."

[0043] Based on the above technical solution, in this application, the network device may instruct the terminal device to wait for the fifth information after the terminal device receives the fourth message, and determine the pre-switching band and the post-switching band based on both the fourth information and the fifth information. Alternatively, there is a valid lag time in the first band indicated by the fourth information after switching. Specifically, after the terminal device receives the fourth information, the terminal device does not immediately perform parameter setting, and the network device further transmits the fifth information while the terminal device is waiting, and finally, the terminal device may determine the pre-switching band and the post-switching band based on both the fourth information and the fifth information. In this way, the terminal device determines the specific band / carrier to be interrupted, and is switched to the target frequency band / carrier. This avoids the problem of reconfiguring the band corresponding to the channel of the terminal device, reduces the processing delay of the terminal device, and improves the data transmission performance.

[0044] In a possible implementation, the method further includes: the terminal device transmitting sixth information to the network device, the sixth information being used by the network device to determine the second information, where the sixth information includes a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being one in which the terminal device supports a first number of radio frequency chains transmitted within a band of a first band group, and the second state being one in which the terminal device supports a second band; the sixth information includes at least a switching delay of switching of the terminal device between the first state and the second state, the first state being that the terminal device supports a first number of radio frequency chains transmitted in bands of the first band group and the second state being that the terminal device supports a second number of radio frequency chains transmitted in bands of the second band group; and / or the sixth information includes at least a switching correspondence between bands in the case of switching of the terminal device from at least one first band to at least one second band.

[0045] Based on the above technical solution, in this application, the terminal device can report to the network device the bands supported by each channel, or the corresponding switching correspondence between bands when switching is performed between states, so that the network device can clearly indicate the specific band that the terminal device needs to switch to the target band. This avoids the problem of reconfiguring the band corresponding to the channel of the terminal device, reduces the processing delay of the terminal device, and improves the data transmission performance. In addition, the terminal device can further report the switching delay required for switching between states, so that the network device can determine the scheduled uplink data.

[0046] According to a fifth aspect, a communication method is provided. The method may be performed by a network device (e.g., a base station) or may be performed by a component (e.g., a chip or a circuit) of the network device. This is not limited herein.

[0047] For the advantageous effects corresponding to the technical solution on the network side and the advantageous effects corresponding to the device, please refer to the description of the advantageous effects on the terminal side, and the details will not be described again here.

[0048] The method includes: the network device determining first information, the first information including N information blocks, a j-th information block among the N information blocks including a first field, the first field indicating a band and / or carrier after switching of the terminal device, the j-th information block being associated with a band and / or carrier before switching of the terminal device, where N is a positive integer; and the network device transmitting the first information to the terminal device.

[0049] In a possible implementation, the jth information block further includes a second field, which indicates a time offset between the first information and the uplink data scheduled by the first information, and the uplink data is transmitted on the band and / or carrier after switching.

[0050] In a possible implementation, the method further includes: the network device receiving sixth information from the terminal device, the sixth information being used by the network device to determine the first information, where the sixth information includes a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being one in which the terminal device supports a first number of radio frequency chains transmitted within a band of a first band group, and the second state being one in which the terminal device supports a second band group. the sixth information includes at least a switching delay of switching of the terminal device between the first state and the second state, the first state being that the terminal device supports a first number of radio frequency chains transmitted in bands of the first band group and the second state being that the terminal device supports a second number of radio frequency chains transmitted in bands of the second band group; and / or the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device from the at least one first band to the at least one second band.

[0051] According to a sixth aspect, a communication method is provided. The method may be performed by a network device (e.g., a base station) or may be performed by a component (e.g., a chip or a circuit) of the network device. This is not limited herein.

[0052] The method includes: the network device determining second information, the second information including M information blocks, a k-th information block among the M information blocks being associated with a band pair of the terminal device, the band pair including a band before switching of the terminal device and a band after switching of the terminal device, where M is a positive integer; and the network device transmitting the second information to the terminal device.

[0053] In a possible implementation, the k-th information block further includes a third field, which indicates a carrier after switching of the terminal device.

[0054] In a possible implementation, the kth information block includes a second field, which indicates a time offset between the second information and uplink data scheduled by the second information, and the uplink data is transmitted on a band or carrier after switching.

[0055] In a possible implementation, the method further includes: the network device receiving sixth information from the terminal device, the sixth information being used by the network device to determine the second information, where the sixth information includes a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being one in which the terminal device supports a first number of radio frequency chains transmitted within a band of a first band group, and the second state being one in which the terminal device supports a second band group. the sixth information includes at least a switching delay of switching of the terminal device between the first state and the second state, the first state being that the terminal device supports a first number of radio frequency chains transmitted in bands of the first band group and the second state being that the terminal device supports a second number of radio frequency chains transmitted in bands of the second band group; and / or the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device from the at least one first band to the at least one second band.

[0056] According to a seventh aspect, a communication method is provided. The method may be performed by a network device (e.g., a base station) or may be performed by a component (e.g., a chip or a circuit) of the network device. This is not limited herein.

[0057] The method includes: the network device determining third information, the third information including a first field, the first field indicating a band and / or carrier after switching of the terminal device, the band and / or carrier before switching being determined by the terminal device according to a preset rule or the band and / or carrier before switching being indicated by the network device; and the network device transmitting the third information to the terminal device.

[0058] In a possible implementation, the third information further includes a second field, the second field indicating a time offset between the third information and the uplink data scheduled by the third information, the data being transmitted on the band and / or carrier after switching.

[0059] In a possible implementation, the third information further includes a fourth field, the fourth field indicating the second table in which the time offset is located, or the fourth field indicating the position or index of the time offset in the first table.

[0060] In a possible implementation, the method further includes: the network device receiving sixth information from the terminal device, the sixth information being used by the network device to determine the third information, where the sixth information includes a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being one in which the terminal device supports a first number of radio frequency chains transmitted within a band of a first band group, and the second state being one in which the terminal device supports a second band group. the sixth information includes at least a switching delay of switching of the terminal device between the first state and the second state, the first state being that the terminal device supports a first number of radio frequency chains transmitted in bands of the first band group and the second state being that the terminal device supports a second number of radio frequency chains transmitted in bands of the second band group; and / or the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device from the at least one first band to the at least one second band.

[0061] According to an eighth aspect, a communication method is provided. The method may be performed by a network device (e.g., a base station) or may be performed by a component (e.g., a chip or a circuit) of the network device. This is not limited herein.

[0062] The method includes: the network device determines the fourth information, the fourth information includes a fifth field, the fifth field indicates a first band after switching of the terminal device, the fourth information further includes a sixth field, the sixth field instructs the terminal device to receive the fifth information, the fifth information indicates a second band after switching of the terminal device. Alternatively, the fourth information further includes a seventh field, the seventh field indicates a lag time for the fifth field to take effect. The terminal device receives the fifth information within this period, the fifth information indicates the second band after switching of the terminal device. The network device transmits the fourth information and the fifth information to the terminal device.

[0063] In a possible implementation, the network device receives sixth information from the terminal device, the sixth information being used by the network device to determine the fourth information, wherein the sixth information includes a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being that the terminal device supports a first number of radio frequency chains transmitted in a band of the first band group and the second state being that the terminal device supports a second number of radio frequency chains transmitted in a band of the second band group; the sixth information includes at least a switching delay of switching of the terminal device between the first state and the second state, the first state being that the terminal device supports a first number of radio frequency chains transmitted in a band of the first band group and the second state being that the terminal device supports a second number of radio frequency chains transmitted in a band of the second band group; and / or the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device from at least one first band to at least one second band.

[0064] According to a ninth aspect, there is provided a communication device, the device being configured to perform the method according to any one of the possible implementations of the first to fourth aspects. In particular, the device may include units and / or modules, such as a transceiver unit and / or a processing unit, configured to perform the method according to any one of the possible implementations of the first to fourth aspects.

[0065] In implementation, the device is a terminal device. If the device is a communication device, the communication unit may be a transceiver or an input / output interface. The processing unit may be at least one processor. Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0066] In other implementations, the apparatus is a chip, chip system, or circuit used in a terminal device. If the apparatus is a chip, chip system, or circuit used in a communication device, the communication unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, associated circuit, etc. of the chip, chip system, or circuit, and the processing unit may be at least one processor, processing circuit, logic circuit, etc.

[0067] According to a tenth aspect, there is provided a communication device. The device is configured to perform the method according to any one of the possible implementations of the fifth to eighth aspects. In particular, the device may include units and / or modules, such as a transceiver unit and / or a processing unit, configured to perform the method according to any one of the possible implementations of the fifth to eighth aspects.

[0068] In implementation, the apparatus is a network device. If the apparatus is a communication device, the communication unit may be a transceiver or an input / output interface. The processing unit may be at least one processor. Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0069] In other implementations, the apparatus is a chip, chip system, or circuit used in a network device. If the apparatus is a chip, chip system, or circuit used in a communications device, the communications unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, associated circuitry, etc. of the chip, chip system, or circuit, and the processing unit may be at least one processor, processing circuit, logic circuit, etc.

[0070] According to an eleventh aspect, there is provided a communications device. The device includes at least one processor configured to execute a computer program or instructions stored in a memory to perform the method of any one of the possible implementations of any one of the first to fourth aspects. Optionally, the device further includes a memory configured to store the computer program or instructions. Optionally, the device further includes a communications interface, and the processor reads the computer program or instructions stored in the memory through the communications interface.

[0071] In an implementation, the apparatus is a terminal device.

[0072] In other implementations, the apparatus is a chip, chip system, or circuitry used in a terminal device.

[0073] According to a twelfth aspect, there is provided a communications device. The device includes at least one processor configured to execute a computer program or instructions stored in a memory to perform the method of any one of the possible implementations of the fifth to eighth aspects. Optionally, the device further includes a memory configured to store the computer program or instructions. Optionally, the device further includes a communications interface, and the processor reads the computer program or instructions stored in the memory through the communications interface.

[0074] In an implementation, the apparatus is a network device.

[0075] In other implementations, the apparatus is a chip, a chip system, or a circuit used in a network device.

[0076] According to a thirteenth aspect, the present application provides a processor including an input circuit, an output circuit, and a processing circuit configured to receive a signal through the input circuit and to transmit a signal through the output circuit, whereby the processor performs a method according to any one of the possible implementations of any one of the first to eighth aspects.

[0077] In a specific implementation process, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, any logic circuit, etc. The input signal received by the input circuit may be received and input, for example, but not limited to, by a transceiver, and the signal output by the output circuit may be output and transmitted, for example, but not limited to, by a transmitter, and the input circuit and the output circuit may be the same circuit, when the circuit is used as an input circuit and an output circuit at different moments. The specific implementation of the processor and various circuits is not limited to the embodiments of the present application.

[0078] Unless otherwise specified, or where operations such as transmitting and acquiring / receiving related to a processor are not inconsistent with actual functions or internal logic in the relevant description, operations may be understood as operations such as output, receiving, and input performed by a processor, or as transmitting and receiving operations performed by a radio frequency circuit and an antenna, which is not limited in this application.

[0079] According to a fourteenth aspect, there is provided a processing device including a processor and a memory, the processor being configured to read instructions stored in the memory, receive signals via a transceiver, and transmit signals via a transmitter, so as to perform a method according to any one of the possible implementations of any one of the first to eighth aspects.

[0080] Optionally, there are one or more processors and one or more memories.

[0081] Optionally, the memory may be integral with the processor, or alternatively, the memory and the processor are separately located.

[0082] In a specific implementation process, the memory may be a non-transitory memory such as a read-only memory (ROM). The memory and the processor may be integrated into one chip, or may be separately arranged on different chips. The type of memory and the way in which the memory and the processor are arranged are not limited in this embodiment of the present application.

[0083] It should be understood that the related data exchange process, such as sending instruction information, may be a process of outputting instruction information from a processor, and receiving capability information may be a process of receiving input capability information by a processor. Specifically, data output by a processor may be output to a transmitter, and input data received by a processor may be from a transceiver. The transmitter and transceiver may be collectively referred to as a transceiver.

[0084] The processing device of the fourteenth aspect may be one or more chips. The processor in the processing device may be implemented in hardware or software. If the processor is implemented in hardware, the processor may be a logic circuit, an integrated circuit, etc. If the processor is implemented in software, the processor may be a general-purpose processor and is implemented by reading software code stored in a memory. The memory may be integrated into the processor or may be external and independent of the processor.

[0085] According to a fifteenth aspect, there is provided a computer-readable storage medium storing program code for execution by a device, the program code being used to perform the method in any one of the possible implementations of the first to eighth aspects.

[0086] According to a sixteenth aspect, there is provided a computer program product comprising instructions, which when executed on a computer, can cause the computer to carry out the method in any one of the possible implementations of the first to eighth aspects.

[0087] According to a seventeenth aspect, there is provided a chip system including a processor configured to call a computer program from a memory and execute the computer program, whereby a device in which the chip system is installed executes a method in any one of the possible implementations of the first to eighth aspects.

[0088] According to an eighteenth aspect, there is provided a communication system including a terminal device and a network device, the terminal device being configured to perform the method according to any one of the first to fourth aspects, and the network device being configured to perform the method according to any one of the fifth to eighth aspects. [Brief description of the drawings]

[0089] [Figure 1] FIG. 1 is a diagram of a scenario in which the present application is applied. [Diagram 2] 2 is a schematic flow chart of a communication method 200 according to the present application. [Diagram 3] FIG. 2 is a diagram of an information block in a first information according to the present application. [Figure 4] FIG. 2 is a diagram of an information block in a second information according to the present application. [Diagram 5] FIG. 3 is a diagram of a third information item according to the present application. [Figure 6] 1 is a block diagram of a communication device 100 according to the present application. [Figure 7] 2 is a block diagram of a communication device 200 according to the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0090] The following describes the technical solutions of the embodiments of the present application with reference to the accompanying drawings.

[0091] Wireless communication systems to which embodiments of the present application may be applied include, but are not limited to, Global System for Mobile Communication (GSM) systems, Long Term Evolution (LTE) frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, LTE systems, Long Term Evolution-Advanced (LTE-Advanced, LTE-A) systems, next generation communication systems (e.g., 6G communication systems), converged systems of multiple access systems, or evolved systems.

[0092] The technical solutions provided in this application may further be applied to machine type communication (MTC), long term evolution-machine (LTE-M), device-to-device (D2D) networks, machine-to-machine (M2M) networks, internet of things (IoT) networks, or other networks. IoT networks may include, for example, internet of vehicles. Communication methods in internet of vehicles systems are collectively referred to as vehicle-to-X (V2X, where X stands for anything). For example, V2X may include vehicle-to-vehicle (V2V) communications, vehicle-to-infrastructure (V2I) communications, vehicle-to-pedestrian (V2P) communications, or vehicle-to-network (V2N) communications.

[0093] The terminal device in the embodiment of the present application may include various access terminals, mobile devices, user terminals, or user equipments having wireless communication capabilities. For example, the terminal device may be a user equipment (UE) such as a mobile phone, a tablet computer (pad), a computer with a wireless transceiver capability, a virtual reality (VR) terminal device, or an augmented reality (AR) terminal device. The terminal device may alternatively be a wireless terminal in industrial control, a machine type communication (MTC) terminal, a customer premises equipment (CPE), a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, 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.

[0094] A network device (e.g., a radio access network device) in an embodiment of the present application may be an access device for a terminal device to wirelessly access a mobile communication system. The radio access network device may be a base station, an evolved NodeB (eNB), a home base station, an access point (AP) in a wireless fidelity (Wi-Fi) system, a radio relay node, a radio backhaul node, a transmission point (TP) or a transmission reception point (TRP), a macro base station or a micro base station, a high frequency base station, etc. Alternatively, the radio access network device may be a next generation NodeB (gNB) in an NR system, or may be a component or any device included in a base station, such as a central unit (CU), a distributed unit (DU), or a baseband unit (BBU). It should be understood that the specific technology and the specific device form used for the radio access network device are not limited in the embodiments of the present application. In this application, the radio access network device is simply referred to as a network device. Unless otherwise specified, in this application, all network devices are radio access network devices. In this application, the network device may be the network device itself, or may be a chip used in the network device to realize wireless communication processing functions.

[0095] It should be understood that the scenario shown in Fig. 1 is only one example of a scenario in which the technical solution of the present application is used. The present application does not exclude other scenarios in which a terminal device also needs to switch between multiple frequency bands. That is, the technical solution of the present application may be applied to scenarios in which various terminal devices need to switch between multiple frequency bands.

[0096] In a 5G new radio (NR) system, a network device (e.g., a base station) may transmit radio waves over a very long distance by using a large transmission power. However, the transmission power of a terminal device is very small and the uplink coverage is limited. Therefore, the received signal strength of the uplink transmission signal arriving at the network device may be insufficient to guarantee the coverage performance of the uplink transmission signal. In addition, the uplink spectrum may also be insufficient. Therefore, it is not possible to rely on retransmission of data to guarantee the uplink coverage performance of the uplink transmission signal.

[0097] FIG. 1 is a diagram of a scenario in which the technical solution of the present application is applied. As shown in FIG. 1, currently, a supplementary uplink (SUL) is introduced in NR as an alternative when uplink coverage is insufficient in the NR system. Since the low frequency band of long term evolution (LTE) usually has better coverage performance, it is considered that for SUL, a carrier is used for NR uplink transmission from the low frequency band of LTE (e.g., 700 MHz, 1.8 GHz, or 2.1 GHz). Currently, when performing NR transmission by using the frequency band of LTE, the terminal device may reuse the frequency band by LTE uplink time division duplex (TDD). Specifically, when the terminal device is within the coverage of the TDD mid-frequency band (2.6 GHz, 3.5 GHz, or 4.9 GHz), the terminal device can use the TDD mid-frequency band; or, when the terminal device moves out of the coverage of the TDD mid-frequency band (2.6 GHz, 3.5 GHz, or 4.9 GHz), the terminal device can use the LTE low-frequency band in the uplink. This makes up for the weakness of the uplink coverage of the TDD mid-frequency band and extends the uplink coverage. Indeed, with future evolution, the terminal device may also use other frequency bands in the uplink as additional uplinks to further extend the uplink coverage.

[0098] It may also be understood that when transmitting uplink data in an NR frequency band (e.g., 2.6 GHz), the terminal device may use a carrier for NR uplink transmission from a low frequency band of LTE (e.g., 700 MHz / 800 MHz / 900 MHz, 1.8 GHz, or 2.1 GHz). A carrier may be understood as a frequency band of the SUL. That is, in this SUL scenario, it is expected that the terminal device may dynamically switch between multiple frequency bands such as 700 MHz / 800 MHz / 900 MHz, 1.8 GHz, 2.1 GHz, 3.5 GHz, and 4.9 GHz based on the channel condition or loading condition of the corresponding frequency band.

[0099] In order to help understand the technical solution of the present application, the following provides a brief explanation of some technical terms used in the present application.

[0100] Phase-locked loop (PLL) switching delay: It usually takes about 300 ms to relock a phase-locked loop to a frequency band. Specifically, when the phase-locked loop of a frequency band is closed, such a switching delay is needed to relock the phase-locked loop to another frequency band or to open a new phase-locked loop.

[0101] A transmitter (TX): may be referred to as a "radio frequency (RF) transmission channel" which may also be simply referred to as a "transmission channel". In this application, a transmission channel may operate in the following manner, but is not limited to such manner: the transmission channel may receive a baseband signal from a baseband chip, perform radio frequency processing (e.g., up-conversion, amplification, and filtering) on ​​the baseband signal to obtain a radio frequency signal, and finally radiate the radio frequency into space by an antenna. For example, the transmission channel may include electronic devices such as an antenna switch, an antenna tuner, a low noise amplifier (LNA), a power amplifier (PA), a mixer, a local oscillator (LO), and a filter. These electronic devices may be integrated into one or more chips based on requirements. An antenna may also sometimes be considered as a part of the transmission channel.

[0102] The "channel" referred to in the following embodiments of the present application can also be understood as a "radio frequency chain". The radio frequency chain of the present application can also be replaced by Tx, antenna, radio frequency, transmission channel, transmission port, reception channel, or any combination thereof. Details will not be described again below.

[0103] It should be understood that the "band" referred to in the embodiments of the present application can also be understood as a "frequency band", "frequency", or "spectrum". Alternatively, the "frequency band" of the present application can also be understood as a component carrier (CC) (which may be simply referred to as a "carrier"), that is, the technical solutions of the present application are also fully applicable to a "carrier". In the following embodiments of the present application, a "band" is mainly used as an example for description.

[0104] In this application, the transmission of radio frequency chains may also be understood as "transmitting," "can transmit," "transmission," or "can transmit." Correspondingly, the number of transmitted radio frequency chains may also be understood as the "number transmitted," "number that can be transmitted," "number that is transmitted," or "number that can be transmitted." The number of transmitted radio frequency chains may also be understood as the "number of layers," "number of antenna layers," or "number of channels."

[0105] The "switching" referred to in the embodiment of the present application may also be understood as "conversion", the "switching delay" referred to in the embodiment of the present application may also be understood as "carrier switching delay", "carrier conversion delay", "carrier conversion period (period or interval)", or "conversion gap", and the "switching delay" referred to in the embodiment of the present application may also be called "switching time within carrier switching preparation time" or "switching time prior to switching preparation". Correspondingly, when performing uplink scheduling, the network device performs a corresponding scheduling process based on the switching delay. Specifically, it may be understood as N2 being set (where N2 may be understood as uplink processing delay or uplink preparation delay). Details will not be described again below.

[0106] The bands supported by the channels of the terminal device are not completely the same. For example, channel #1 can support band #A and band #C, and channel #2 can support band #A and band #B. For example, the state in which the terminal device transmits a radio frequency chain in slot #1 is state #1 (e.g., state #1 is that band #A is used in channel #1 and band #2 is used in channel #2), and two downlink control information (DCI) can be received in slot #2, indicating the band to be used when the terminal device is switched to state #2. For example, DCI #1 indicates to use band #A, and DCI #2 indicates to use band #C. The terminal device cannot process two downlink control information simultaneously. Therefore, for example, the terminal device may first process the first downlink control information and then process the second control information. In this case, the terminal device may refer to state #1 before switching by default to determine the band indicated by the corresponding downlink control information. For example, the terminal device still uses band #A on channel #1 and band #C on channel #2, and starts to set channel parameters. However, channel #2 of the terminal device may not support band #C. In this case, the terminal device needs to cancel the previously set channel parameters and reconfigure the channel parameters. Therefore, the processing delay of the terminal device is prolonged. It should be understood that the above scenario is only one example of the present application. There are many such scenarios when the terminal device switches between states. The examples will not be analyzed one by one again here.

[0107] In view of this, the present application provides a communication method, in which a network device indicates a band and / or carrier before switching of a terminal device and a band and / or carrier after switching of the terminal device, so that the terminal device can clearly obtain a specific band / carrier to be interrupted and can be switched to a target frequency band / carrier, thereby avoiding the problem of reconfiguring a band corresponding to a channel of the terminal device, reducing the processing delay of the terminal device and improving the data transmission performance.

[0108] It should be noted that "associated with," "corresponding to," and "implicitly corresponding to" may be substituted for each other as referred to herein. "According to" as referred to herein may be understood as "based on."

[0109] The "correspondence", "association relationship", etc. referred to in this application may be configured for the terminal device by the network device by using radio resource control (RRC) signaling, or may be a predefined rule.

[0110] Figure 2 shows a communication method 200 according to the present application. In the method 200, steps in a specific embodiment of the technical solution of the present application are represented from the perspective of the interaction between a terminal device and a network device. The following describes the steps shown in Figure 2.

[0111] Step 201: The terminal device sends sixth information to the network device.

[0112] In a possible implementation, the sixth information may include a correspondence between channels and bands of the terminal device, where the bands are bands supported by the channels. For example, each channel supports transmission in two bands. As another example, each channel supports transmission in three bands. The number of channels is not limited in this application, and the number of bands supported by each channel is also not limited.

[0113] In an example, a terminal device may report that channel #1 supports bands #A and #C, and channel #2 supports band #A and band #B. As another example, a terminal device may report that channel #1 supports band #A and band #D, channel #2 supports band #A and band #B, channel #3 supports band #B and band #C, and channel #4 supports band #A and band #C.

[0114] In this application, the bands supported by each channel may be understood as each channel supporting transmission in those bands.

[0115] In another possible implementation, the sixth information includes an inter-band switching correspondence when the terminal device is switched between states (first state and second state), for example, the first state is that the terminal device supports a first number of radio frequency chains transmitted in a band of a first band group, and the second state is that the terminal device supports a second number of radio frequency chains transmitted in a band of a second band group.

[0116] In the present application, a "band of the first band group" may also be understood as at least one first band, and a "band of the second band group" may also be understood as at least one second band, in which case the first state may be understood as the terminal device supporting a first number of radio frequency chains transmitted in at least one first band, and the second state may be understood as the terminal device supporting a second number of radio frequency chains transmitted in at least one second band.

[0117] It is assumed that channel #1 of the terminal device supports band #A and band #C, and channel #2 supports band #A and band #B. In the example, state #4 (an example of a first state) is that the terminal device uses band #A (an example of a first band) to transmit a radio frequency chain (here, "radio frequency chain" can also be expressed as "Tx") on channel #1 and uses band #B (an example of a second band) to transmit a radio frequency chain on channel #2, and state #5 (an example of a second state) is that the terminal device uses band #C (another example of the first band) to transmit a radio frequency chain on channel #1 and uses band #A (another example of the second band) to transmit a radio frequency chain on channel #2. In this case, the terminal device may report to the network device that the terminal device is switched from band #A to band #C on channel #1 and switched from band #B to band #A on channel #2. An example is shown in Table 1. [Table 1]

[0118] In another example, it is assumed that state #1 (an example of a first state) is one in which the terminal device uses band #B on channel #2 (e.g., there are two radio frequency chains transmitted on channel #2), and state #4 (an example of a second state) is one in which the terminal device transmits a radio frequency channel using band #A on channel #1 and transmits a radio frequency chain on channel #2 using band #B. In this case, the terminal device may report to the network device that band #B is switched to band #B on channel #2 (which may also be understood as no switching being required in this case), and the band used on channel #1 is switched to band #A (which may be understood as no radio frequency chain is transmitted on channel #1 before switching). An example is shown in Table 2. [Table 2]

[0119] In yet another possible implementation, the sixth information comprises a corresponding switching delay when the terminal device is switched between states (first state and second state).

[0120] In an example, for example, a terminal device may report a switching delay #1 required for switching between state #4 and state #5. The switching delay #1 may be 38 microseconds, 140 microseconds, 210 microseconds, 280 microseconds, 500 microseconds, 1 millisecond, etc. In another example, a terminal device may report a switching delay #2 required for switching between state #1 and state #5. The switching delay #2 may be 38 microseconds, 140 microseconds, 280 microseconds, 210 microseconds, 280 microseconds, 500 microseconds, 1 millisecond, etc. When a terminal device reports a switching delay #2 required for switching between state #1 and state #5, it may also be understood that a switching correspondence between state #1 and state #5 is implicitly indicated, i.e., a corresponding switching may be performed between state #1 and state #5.

[0121] In another possible implementation, the sixth information may include inter-band switching correspondence when the terminal device is switched from at least one first band to at least one second band.

[0122] In an example, the terminal device may report that the terminal device is switched from a first first band to a first second band and / or from a second first band to a second second band, see Table 1. For example, the terminal device may report that the terminal device is switched from Band #A to Band #C and from Band #B to Band #A.

[0123] In yet another possible implementation, the terminal device may alternatively report a switching delay required for switching from a default or fallback state to a new frequency band. In this case, after completing the transmission in the current band, the terminal device may further retreat to the frequency band corresponding to the default / fallback state. For example, the switching delay may be 35 microseconds. The terminal device retreats to the frequency band corresponding to the default / fallback state, and the phase-locked loop is locked to the frequency band corresponding to the default / fallback state. In this application, the default / fallback state may be predefined or preconfigured by the network device. In this application, preconfiguration may be understood as the network device performing the configuration by using radio resource control (RRC) signaling.

[0124] In another possible implementation, the terminal device may further report that the original state is reserved: in particular, the terminal device does not switch to a fallback state from a state in which the network device has scheduled the terminal device to transmit, but continues to remain only in the state instructed by the base station.

[0125] Step 202: The network device receives the sixth information sent by the terminal device, and determines the first information.

[0126] For example, the terminal device may determine the band and / or carrier before switching of the terminal device and the band and / or carrier after switching based on the sixth information reported by the terminal device. For example, as shown in Table 1, the terminal device may report to the network device that the terminal device is switched from band #A to band #C on channel #1 and switched from band #B to band #A on channel #2. If the current state is band #A 1 Tx and band #B 1 Tx, and the next state is expected to be band #A 1 Tx and band #C 1 Tx, the network device may determine that the terminal device needs to interrupt the current transmission from band #B and perform a target transmission to band #A, and further determine that the terminal device needs to interrupt the current transmission from band #A and perform a target transmission to band #C. Thus, the band before switching is band #B, the band after switching is band #A, the band before switching is band #A, and the band after switching is band #C.

[0127] As another example, the default state is band #A. If the time interval between the current state and the next state is equal to or greater than the time length, the terminal device enters the default state. Optionally, the time length may be predefined, for example the duration of two slots or the duration of one slot. If the next state is expected to be band #A 1 Tx and band #C 1 Tx, it may be determined that the terminal device needs to reserve 1 Tx from band #A to perform target 1 Tx transmission and suspend 1 Tx to perform target 1 Tx transmission to band #C.

[0128] The first information includes at least one information block (e.g., N information blocks, where N is an integer greater than 0), and each information block may be associated with a band and / or carrier before switching of the terminal device. It may also be understood that each information block may be implicitly associated with a band and / or carrier before switching of the terminal device. The first information block may correspond to the lowest band index and / or carrier index, and by analogy, the Nth information block may correspond to the highest frequency band index and / or carrier index. As another example, the first information block may correspond to the highest band index and / or carrier index, and by analogy, the Nth information block may correspond to the lowest band index and / or carrier index.

[0129] In the present application, the lowest band index and / or carrier index and the highest band index and / or carrier index may be for the band and / or carrier currently used by the terminal device. For example, if the bands currently used by the terminal device are n28 and n43, the lowest band index is the band index corresponding to band n28, and the highest band index is the band index corresponding to band n43. As another example, if the carriers currently used by the terminal device are serving cell #3 and serving cell #5, the lowest carrier index is index 3 corresponding to carrier serving cell #3, and the highest carrier index is index 5 corresponding to carrier serving cell #5.

[0130] For example, if the bands currently being used by the terminal device are band #1 and band #3, the first information block may correspond to terminal band #1 and the second information block may correspond to band #3. If the bands currently being used by the terminal device are band #28 and band #36, for example, the first information block may correspond to band #8 and the second information block may correspond to band #36.

[0131] For example, if a terminal device is currently using carrier #3 in band #1 and carrier #1 in band #2, the first information block may correspond by default to carrier #3 in band #1, and the second information block may correspond by default to carrier #1 in band #2.

[0132] For example, in implementation, the index may be set for all carriers on the band. If each band can support four carriers, there may be 12 carriers in band #1 to band #3. It is assumed that carrier #1 to carrier #4 are carriers in band #1, carrier #5 to carrier #8 are carriers in band #2, and carrier #9 to carrier #12 are carriers in band #4. In this case, the first information block may correspond to carrier #1, the second information block may correspond to carrier #2, the third information block may correspond to carrier #3, the tenth information block may correspond to carrier #10, etc. In this case, it may be understood that the band after switching may alternatively be implicitly indicated by using the correspondence between the information block and the carrier.

[0133] For example, each information block may alternatively correspond to one carrier set, which may be understood as 32 carriers divided into P sets or groups (where P is an integer greater than 0), and each information block corresponds to the index of one carrier set or the index of one carrier group.

[0134] Specifically, those skilled in the art may design the bands and / or carriers associated with each information block based on the actual situation, which is not limited in the present application.

[0135] The first information includes at least one information block, and each information block includes a field #1 (an example of a first field), which indicates a band and / or carrier after switching.

[0136] In implementation, the field #1 includes a one-bit first indication, which indicates whether to trigger switching from the current band and / or carrier (indication on whether switch this band / CC). The field #1 may further include a second indication (where the second indication may occupy, for example, 3 bits), which indicates a band and / or carrier to switch to (switch to band / CC). For example, the second indication may indicate a band index (switch to band index / CC index) of the band to switch to. For example, the second indication may indicate that the band to switch to is band #3. As another example, the second indication may indicate a carrier of the band to switch to (for example, carrier #1 of band #4). As yet another example, the second indication may indicate a carrier to switch to. For example, the carrier to switch to is carrier #11 (as described above, in this case, it may be implicitly indicated that the band to switch to is band #3).

[0137] Optionally, each information block may further include a field #2 (an example of a second field) indicating a time offset between the first information and the uplink data scheduled by using the first information. Alternatively, the field #2 may be understood as indicating K2' or K1'. For example, the network device may determine the scheduling of uplink data for the terminal device (e.g., determine K2') based on the switching delay between states reported by the terminal device, so that after completing the switching between states, the terminal device receives data at a specific slot or symbol based on the indication of the field #2. This can avoid receiving data before the terminal device completes the switching between states, thereby improving data transmission performance.

[0138] In this application, a "time offset" may alternatively be a "slot offset" or a "symbol offset", or alternatively a "slot offset" and a "symbol offset".

[0139] K2 is the delay of scheduling the transmission of uplink data (also called data processing time or data preparation time), and K1 is the delay from scheduling the physical downlink shared channel (PDSCH) to feeding back the physical uplink control channel (PUCCH). For a description of K2, please refer to the technical specification (TS) 38.214 of the 3rd generation partnership project (3GPP) for understanding, and for a description of K1, please refer to the technical specification TS 38.213 of 3GPP. Details are not specifically described in this application.

[0140] In the present application, K2' may be, for example, the existing K2 plus the lock time of the phase-locked loop. Similarly, K1' may be, for example, the existing K1 plus the lock time of the phase-locked loop. For example, K2' may be greater than or equal to three slot times or four slot times.

[0141] In an example, a table may be defined separately for K2' (e.g., the K2 table in the existing protocol may be denoted as a "first table" and the K2' table of the present application may be denoted as a "second table"). K2' is different from the values ​​listed in the existing K2 table. When the network device indicates K2' to the terminal device, a table index indication and an indication of the value of K2' are required. It may also be understood that in this case, the second table needs to be indicated. In another example, the value of K2' may be additionally added based on the current K2 table. For example, a bit extension may be performed. In this case, a table index indication is not required.

[0142] Optionally, each information block further includes at least one of modulation and coding scheme offset (MCS offset) information, transmit power control (TPC) information, and other scheduling information indicating the transmission rate of the terminal device in the band / carrier after switching. For example, the network device may refer to the MCS information or TPC information in the current band / carrier to indicate the MCS information and TPS information in the target band / carrier after switching.

[0143] Optionally, the first information may not include any scheduling information (e.g., MCS offset information and TPC information). In this case, the scheduling DCI of the target band / carrier needs to be used together. Specifically, the transmission of uplink data in the target band / carrier can only be completed after the first information is used together with the DCI for scheduling the transmission of uplink data in the target band / carrier. In this case, it can also be understood that the first information only indicates a specific band / carrier whose transmission is interrupted due to switching and a band / carrier after switching, and is not used for scheduling indication.

[0144] As shown in Figure 3, each information block may correspond to a band and / or carrier that is locked or parked by the current phase-locked loop. For example, the information blocks may correspond sequentially to band and / or carrier numbers (where "number" may also be understood as "index") in ascending order, or may correspond sequentially to band / carrier numbers in descending order (wherein the fields indicated by dashed lines in Figure 3 are optional).

[0145] For example, the first information may be group common downlink control information (DCI) (specifically, in this case, one or more terminals may determine the band / carrier with switching based on the DCI), and the cyclic redundancy check (CRC) of the DCI is scrambled by using a new physical uplink shared channel-switch-radio network temporary identifier (PUSCH-switch-RNTI). The new physical uplink shared channel-switch-radio network temporary identifier is configured by the network device by using RRC signaling. In this case, the first information does not need to indicate the second table. This is because the new RNTI is used for scrambling, and the terminal device may determine that the delay included in the first information is the delay in the second table by parsing the RNTI by default.

[0146] Step 203: The network device sends the first information to the terminal device.

[0147] For example, a network device may transmit a group-common DCI to a terminal device.

[0148] Step 204: The terminal device receives the first information sent by the network device, and sends uplink data in the switched band / carrier according to the first information.

[0149] In the example, it is assumed that the terminal device is currently using band #18 on channel #1 and band #20 on channel #2 to transmit uplink data. The first information received by the terminal device includes two information blocks, the first information block corresponding to band #18 and the second information block corresponding to band #20. The first information block includes field #1, the first indication in field #1 indicates that switching is performed from the current band (i.e., "indication on whether switch this band" is "1"), and the second indication in field #1 indicates that the band after switching is band #16. Similarly, the second information block also includes field #1, the first indication in field #1 indicates that switching is performed from the current band, and the second indication in field #1 indicates that the band after switching is band #18. That is, the terminal device can be switched from band #18 and band #20 (e.g., fourth state) to band #16 and band #18 (e.g., fifth state).

[0150] In another example, it is assumed that the terminal device is currently using carrier #12 (e.g., implicitly corresponding to band #3) on channel #1 and carrier #25 (e.g., implicitly corresponding to band #7) on channel #2 to transmit uplink data. The first information received by the terminal device includes two information blocks, a first information block corresponding to carrier #12 and a second information block corresponding to carrier #25. The first information block includes field #1, a first indication in field #1 indicating that switching is performed from the current carrier (i.e., “indication on whether switch CC” is “1”), and a second indication in field #1 indicating that the carrier after switching is band #13 (e.g., implicitly corresponding to band #4). Similarly, the second information block also includes field #1, a first indication in field #1 indicating that switching is performed from the current carrier, and a second indication in field #1 indicating that the carrier after switching is carrier #10 (e.g., implicitly corresponding to band #3). That is, the terminal device may be switched from carrier #12 and carrier #25 (eg, fourth state) to carrier #13 and carrier #10 (eg, fifth state).

[0151] In this application, the terminal device can use the first information to determine the specific band and / or carrier to be interrupted and the band and / or carrier after switching, thereby avoiding the problem of reconfiguring the band corresponding to the channel of the terminal device and reducing delay.

[0152] Optionally, if the first information further includes field #2, for example, the terminal device is currently receiving the first information in slot #1, and field #2 can instruct the terminal device to transmit data in the third symbol in the second slot, in other words, the terminal device can start transmitting data from the third symbol in slot #2 using band #16 and band #18.

[0153] In this application, the terminal device can use the first information to determine a specific slot or a specific symbol in which uplink data is transmitted by using a band / carrier after switching, so that after completing switching between states, the terminal device receives data in a specific slot according to the indication of field #2. This can avoid the terminal device receiving data before completing switching between states, thereby improving data transmission performance.

[0154] This application further provides another communication method 300. In the method 300, the steps in a specific embodiment of the technical solution of this application are represented from the perspective of the interaction between a terminal device and a network device. The steps of the method 300 are similar to those of the method 200. For a specific schematic flow chart, please refer to FIG. 2 for understanding. Details will not be shown again. The following describes the steps of the method 300.

[0155] Step 301: The terminal device sends sixth information to the network device.

[0156] In a possible implementation, the sixth information may include a correspondence between a channel and a band of the terminal device, where the band is a band supported by the channel.

[0157] In another possible implementation, the sixth information includes inter-band switching correspondence when the terminal device is switched between states (eg, the first state and the second state).

[0158] In another possible implementation, the sixth information may include inter-band switching correspondence when the terminal device is switched from at least one first band to at least one second band.

[0159] In yet another possible implementation, the sixth information includes a corresponding switching delay when the terminal device is switched between a state (eg, a first state and a second state).

[0160] In yet another possible implementation, the terminal device may alternatively report the switching delay required to switch from a default or fallback state to the new frequency band.

[0161] In another possible implementation, the terminal device may further report that the original state is reserved: in particular, the terminal device is not switched to a fallback state from a state in which the network device schedules the terminal device to perform a transmission, but continues to remain only in a state instructed by the base station.

[0162] For details, please refer to the description of step 201 of method 200 for understanding. The details will not be described again here.

[0163] Step 302: The network device receives sixth information sent by the terminal device, and determines second information based on the sixth information.

[0164] In this embodiment, the second information includes at least one information block (e.g., M information blocks, where M is an integer greater than 0). Each information block is related to a band pair of a terminal device, and the band pair includes a band before switching of the terminal device and a band after switching of the terminal device. A "band pair" can be understood as {switch from band-switch to band}. Each information block can also be understood to be implicitly associated with a band before switching of the terminal device and a band after switching of the terminal device.

[0165] In the example, the first information block may correspond to band pair #1, the second information block may correspond to band pair #2, and the third information block may correspond to band pair #3. If the terminal device supports data transmission in three bands (e.g., band #A, band #B, and band #C), there may be 3×2=6 band pairs. If the terminal device supports data transmission in four bands (e.g., band #A, band #B, band #C, and band #D), there may be 4×3=12 band pairs. For example, Table 3 shows the case of band pairs when the terminal device supports three bands. Specifically, in this embodiment, each information block may implicitly correspond to a band before switching and a band after switching, and the terminal device may obtain the specific band to be interrupted and the band after switching based on each information block. Table 3 may be set by the network device by using RRC signaling, or may be predefined. [Table 3]

[0166] In implementation, each information block includes a 1-bit third instruction, which indicates whether to trigger switching from the current band pair (indication on whether switch this band pair).

[0167] Optionally, each information block may further include a field #3 (an example of a third field), which indicates a carrier after switching. For example, the carrier after switching may be indicated (e.g., switch to CC index).

[0168] For example, a first information block may correspond to band pair #1, and field #3 may further indicate that the switched carrier is carrier #1 in band #B. As another example, a second information block may correspond to band pair #2, and field #3 in the second information block may further indicate that the switched carrier is carrier #4 in band #C.

[0169] Optionally, each information block may further include a field #2 (an example of a second field) indicating a time offset between the first information and the uplink data scheduled by using the first information. Specifically, for understanding of the field #2, please refer to the description of step 202 of the method 200. Details will not be described again here.

[0170] Optionally, each information block further includes at least one of modulation and coding scheme offset (MCS offset) information, transmit power control (TPC) information, and other scheduling information indicating the transmission rate of the terminal device in the band / carrier after switching. For example, the network device may refer to the MCS information or TPC information in the current band / carrier to indicate the MCS information and TPS information in the target band / carrier after switching.

[0171] Optionally, each information block may not include any scheduling information (e.g., MCS offset information and TPC information). In this case, the scheduling DCI of the target band / carrier needs to be used together. Specifically, the transmission of uplink data in the target band / carrier can only be completed after the second information is used together with the DCI for scheduling the transmission of uplink data in the target band / carrier. In this case, it can also be understood that the second information only indicates a specific band / carrier and the band / carrier whose transmission is interrupted by switching, and is not used for scheduling indication.

[0172] As shown in Figure 4, each information block may correspond to one band pair. For example, the information blocks may correspond sequentially to the band pair numbers in ascending order (where "number" may also be understood as "index"), or may correspond sequentially to the band pair numbers in descending order.

[0173] For example, the second information may be group common downlink control information (group common DCI), and the CRC of the DCI may be scrambled by using a new physical uplink shared channel-switch-radio network temporary identifier (PUSCH-switch-RNTI). In this case, the second information does not need to indicate the second table. This is because the new RNTI is used for scrambling, and the terminal device may determine that the delay included in the second information is the delay in the second table by parsing the RNTI by default.

[0174] Step 303: The network device sends the second information to the terminal device.

[0175] For example, a network device may transmit a group-common DCI to a terminal device.

[0176] Step 304: The terminal device receives second information sent by the network device, and sends uplink data in the switched band according to the second information.

[0177] In the example, it is assumed that the terminal device is currently using band #18 on channel #1 and band #20 on channel #2. The terminal device receives second information, where the second information includes two information blocks, and the first information block corresponds to band pair #1. Band pair #1 indicates that the band before switching is band #18 and the band after switching is #16. For example, if the third indication (indication on whether switch this band pair) of one bit in the first information block is 1, the terminal device determines to switch from band #18 to band #16. Similarly, the second information block corresponds to band pair #2, and band pair #2 indicates that the band before switching is #20 and the band after switching is #18. If the third indication (indication on whether switch this band pair) of one bit in the second information block is 1, the terminal device determines to switch from band #20 to band #18. That is, the terminal device may be switched from band #18 and band #20 (e.g., fourth state) to band #16 and band #18 (e.g., fifth state).

[0178] Furthermore, if the first information block further includes a field #3, the field #3 indicates that the carrier after switching of the terminal device is carrier #1. That is, the terminal device may determine to transmit uplink data on carrier #1 in band #16 after switching. As another example, if the second information block includes a field #3, the field #3 indicates that the carrier after switching of the terminal device is carrier #3. That is, the terminal device may determine to transmit uplink data on carrier #3 in band #18 after switching.

[0179] In this application, the terminal device can use the second information to determine the specific band to be interrupted and the band or carrier after switching, thereby avoiding the problem of reconfiguring the band corresponding to the channel of the terminal device and reducing the delay.

[0180] Optionally, if the second information further includes field #2, for example, the terminal device is currently receiving the first information in slot #1, and field #2 can instruct the terminal device to transmit data in the third symbol in the second slot, in other words, the terminal device can start transmitting data from the third symbol in slot #2 using band #16 and band #18.

[0181] In this application, the terminal device can use the second information to determine a specific slot or a specific symbol in which uplink data is transmitted by using the band / carrier after switching, so that after completing switching between states, the terminal device receives data in a specific slot according to the indication of field #2. This can avoid the terminal device receiving data before completing switching between states, thereby improving data transmission performance.

[0182] The present application further provides another communication method 400. In the method 400, the steps in a specific embodiment of the technical solution of the present application are represented from the perspective of the interaction between a terminal device and a network device. The steps of the method 400 are similar to those of the method 200. For a specific schematic flow chart, please refer to FIG. 2 for understanding. Details will not be shown again. The following describes the steps of the method 400.

[0183] Step 401: The terminal device sends sixth information to the network device.

[0184] In a possible implementation, the sixth information may include a correspondence between a channel and a band of the terminal device, where the band is a band supported by the channel.

[0185] In another possible implementation, the sixth information includes inter-band switching correspondence when the terminal device is switched between states (eg, the first state and the second state).

[0186] In yet another possible implementation, the sixth information includes a corresponding switching delay when the terminal device is switched between a state (eg, a first state and a second state).

[0187] In another possible implementation, the sixth information may include inter-band switching correspondence when the terminal device is switched from at least one first band to at least one second band.

[0188] In yet another possible implementation, the terminal device may alternatively report the switching delay required to switch from a default or fallback state to the new frequency band.

[0189] In another possible implementation, the terminal device may further report that the original state is reserved: in particular, the terminal device is not switched to a fallback state from a state in which the network device schedules the terminal device to perform a transmission, but continues to remain only in a state instructed by the base station.

[0190] For details, please refer to the description of step 201 of method 200 for understanding. The details will not be described again here.

[0191] Step 402: The network device receives sixth information sent by the terminal device, and determines third information based on the sixth information.

[0192] In this embodiment, the third information includes field #1 (an example of the first field), and field #1 (e.g., “switch from band / CC index”) indicates a band and / or carrier after switching of the terminal device. For example, field #1 indicates that the band after switching of the terminal device is band #10. As another example, field #1 indicates that the carrier of the terminal device after switching is carrier #17 (in this case, the band after switching may be implicitly determined based on the carrier. For a concrete understanding, please refer to the description of step 202 of method 200). As yet another example, field #1 may explicitly indicate the band after switching and is implicitly associated with the carrier after switching. For example, field #1 indicates that the band after switching of the terminal device is band #10, and the associated carrier after switching is carrier #4 in band #10 by default.

[0193] In a possible implementation, the third information further includes field #8 indicating the band and / or carrier after switching ("switch to band / CC") (e.g., field #8 may indicate the band and / or carrier after switching ("switch to band / CC"). For a specific implementation, please refer to the above implementation in which field #1 indicates the band before switching of the terminal device. Details will not be described again here.

[0194] In another possible implementation, the band and / or carrier before switching can be determined by the terminal device according to a preset rule. For example, the preset rule is that the transmission is interrupted from the band and / or carrier in which the terminal device is located based on the corresponding lowest index, or the transmission is interrupted from the band and / or carrier in which the terminal device is located based on the corresponding highest index. As another example, the preset rule is that the transmission is interrupted by sequentially selecting the lowest index obtained by sorting the corresponding indexes in ascending order from the band and / or carrier in which the terminal device is located, or the transmission is interrupted by sequentially selecting the highest index obtained by sorting the corresponding indexes in descending order from the band and / or carrier in which the terminal device is located.

[0195] The above "switch from band" can indicate a lower / higher band among the currently parked bands by using 0 / 1, or can indicate a band index. For example, one bit of UL / SUL or a padding bit may be reused. In the above description, the switch to band index / CC index can also indicate a lower / higher band among the remaining bands excluding the currently parked band among multiple configured bands by using 0 / 1, or can indicate a band index / CC index, or can indicate one bit of UL / SUL or a padding bit.

[0196] Optionally, the correspondence between the switch from band / CC and the switch to band index / CC may be set by using RRC signaling or may be predefined. For details, please refer to Table 3 for understanding. In this case, the third information may indicate the value of the switching correspondence index in the configuration.

[0197] In a possible implementation, for example, the carrier before switching (e.g., switch from CC index) does not need to be explicitly indicated, but can be obtained implicitly by using the band before switching (switch from band index). For example, it can be specified in advance that switching is performed from carrier #2 in band #1, or switching is performed from carrier #1 in band #2. For example, the carrier after switching (switch to CC index) can be indicated by a carrier indicator field (CIF) for cross-carrier scheduling.

[0198] Optionally, the third information may further include a field #2 (an example of a second field) indicating a time offset between the first information and the uplink data scheduled by using the first information. Specifically, for understanding the field #2, please refer to the description of step 202 of the method 200. Details will not be described again here. Furthermore, when the third information includes the field #2, the third information may further include a field #4 indicating the position of the time offset. For example, the field #4 may indicate the second table in which the time offset is located (in other words, the second table may be redesigned for K2'), or the field #4 may indicate the index or position of the time offset in the first table (in this case, a bit extension may be performed in the existing K2 table (denoted as "first table") to indicate K2').

[0199] Optionally, the third information further includes at least one of modulation and coding scheme offset (MCS offset) information, transmit power control (TPC) information, and other scheduling information indicating a transmission rate of the terminal device in the band / carrier after switching. For example, the network device may refer to MCS information or TPC information in the current band / carrier to indicate MCS information and TPS information in the target band / carrier after switching.

[0200] Optionally, the third information may not include any scheduling information (e.g., MCS offset information and TPC information). In this case, the scheduling DCI of the target band / carrier needs to be used together. Specifically, the transmission of uplink data in the target band / carrier can only be completed after the second information is used together with the DCI for scheduling the transmission of uplink data in the target band / carrier. It can also be understood that in this case, the second information only indicates a specific band / carrier and the band / carrier whose transmission is interrupted by switching, and is not used for scheduling indication. Figure 5 shows fields that may be included in the third information.

[0201] For example, the third information may be dynamically scheduled downlink control information (e.g., DCI 0_1) and may be scrambled by using an existing physical uplink shared channel-switch-radio network temporary identifier (PUSCH-switch-RNTI). In this case, the third information needs to indicate the second table. This is because the existing RNTI is used for scrambling, and the terminal device cannot determine in the descrambling manner that the delay included in the third information is the delay in the second table. Therefore, the second table needs to be explicitly indicated.

[0202] In this embodiment, the third information block may include multiple information blocks, each information block including field #1 (i.e., indicating the band and / or carrier before switching), and each information block may further include field #8 (i.e., indicating the band and / or carrier after switching). It may also be understood that the information block of this embodiment is not implicitly associated with the band and / or carrier before switching. Therefore, both the band and / or carrier before switching and the band and / or carrier after switching need to be explicitly indicated. Optionally, each information block may further include field #2. Optionally, each information block may further include at least one of modulation and coding scheme offset (MCS offset) information, transmit power control (TPC) information, and other scheduling information. Optionally, each information block does not include any scheduling information. In this case, the third information may be compact downlink control information (compact DCI) (DCI 0_0) and may be scrambled by using a new RNTI.

[0203] Step 403: The network device sends third information to the terminal device.

[0204] For example, the network device may transmit a dynamically scheduled DCI to the terminal device, or the network device transmits a compact DCI to the terminal device.

[0205] Step 404: The terminal device receives the third information sent by the network device, and sends uplink data in the switched band according to the third information.

[0206] In the example, an example in which the third information indicates a band is used (the case in which the third information indicates a carrier can be understood in the same way). For example, the network device may simultaneously distribute two pieces of third information. It is assumed that the terminal device is currently using band #18 on channel #1 and band #20 on channel #2. The first piece of third information indicates that the band before switching is band #18 and the band after switching is band #16, and the second piece of third information indicates that the band before switching is band #20 and the band after switching is band #18. In this case, the terminal device is switched from the band on channel #1 to band #16 and from the band on channel #2 to band #18 based on the instruction of the third information. That is, the terminal device can be switched from band #18 and band #20 (e.g., the fourth state) to band #16 and band #18 (e.g., the fifth state).

[0207] Optionally, when the DCI is scrambled by using an existing RNTI, the third information further includes a location indication of K2', for example, a second table in which K2' is located. The terminal device may determine K2' based on the indication.

[0208] In this application, the terminal device can use the third information to determine the specific band to be interrupted and the band or carrier after switching, thereby avoiding the problem of reconfiguring the band corresponding to the channel of the terminal device and reducing the delay.

[0209] Optionally, if the second information further includes field #2, for example, the terminal device is currently receiving the first information in slot #1, and field #2 can instruct the terminal device to transmit data in the third symbol in the second slot, in other words, the terminal device can start transmitting data from the third symbol in slot #2 using band #16 and band #18.

[0210] In this application, the terminal device can use the third information to determine a specific slot or a specific symbol in which uplink data is transmitted by using the band / carrier after switching, so that after completing switching between states, the terminal device receives data in a specific slot according to the indication of field #2. This can avoid the terminal device receiving data before completing switching between states, thereby improving data transmission performance.

[0211] This application further provides another communication method 500. In the method 500, the steps in a specific embodiment of the technical solution of this application are represented from the perspective of the interaction between a terminal device and a network device. The steps of the method 500 are similar to those of the method 200. For a specific schematic flow chart, please refer to FIG. 2 for understanding. Details will not be shown again. The following describes the steps of the method 500.

[0212] Step 501: The terminal device sends sixth information to the network device.

[0213] In a possible implementation, the sixth information may include a correspondence between a channel and a band of the terminal device, where the band is a band supported by the channel.

[0214] In another possible implementation, the sixth information includes inter-band switching correspondence when the terminal device is switched between states (eg, the first state and the second state).

[0215] In yet another possible implementation, the sixth information includes a corresponding switching delay when the terminal device is switched between a state (eg, a first state and a second state).

[0216] In another possible implementation, the sixth information may include inter-band switching correspondence when the terminal device is switched from at least one first band to at least one second band.

[0217] In yet another possible implementation, the terminal device may alternatively report the switching delay required to switch from a default or fallback state to the new frequency band.

[0218] In another possible implementation, the terminal device may further report that the original state is reserved: in particular, the terminal device is not switched to a fallback state from a state in which the network device schedules the terminal device to perform a transmission, but continues to remain only in a state instructed by the base station.

[0219] For details, please refer to the description of step 201 of method 200 for understanding. The details will not be described again here.

[0220] Step 502: The network device receives sixth information sent by the terminal device, and determines fourth information based on the sixth information.

[0221] In this embodiment, the fourth information includes field #5 (an example of a fifth field), which may indicate the first band after switching of the terminal device.

[0222] In a possible implementation, the fourth information further includes field #6 (an example of a sixth field), which instructs the terminal device to receive fifth information, which indicates the second band after switching of the terminal device.

[0223] In an example, the fourth information may be a dynamically scheduled DCI, and a new bit may be added to the existing DCI 0_1 or DCI 0_0. For example, the new bit occupies 1 bit. If the new bit is "1", it indicates that other DCIs for the same terminal device in this slot require cooperative scheduling. "Cooperative scheduling" can be understood as the corresponding channel of the band / CC scheduled by the DCI is determined for transmission after other DCIs are parsed, so that the terminal device can set the corresponding channel parameters based on the complete transmission combination state of the target slot, thereby reducing the reconfiguration problem caused by the channel configuration error. If the new bit is 0, it indicates that other DCIs for the same terminal device in the slot do not require cooperative scheduling. Therefore, the corresponding channel parameters can be immediately enabled for configuration.

[0224] The terminal device may determine the band / carrier before switching and the band / carrier after switching based on the indication of the fourth information and the indication of the fifth information.

[0225] Based on the above technical solution, the fourth information can indicate that there is another DCI detected in the current slot, so that after obtaining the first DCI, the terminal device needs to wait for information about the second DCI, and determine the transmission combination state of the target slot scheduled for transmission according to the two DCIs. Thus, the parameters do not need to be set for the non-corresponding channels, so that the parameter reconfiguration problem is avoided.

[0226] In another possible implementation, the fourth information further includes field #7 (an example of a seventh field), which indicates a lag time for field #5 to take effect. The network device can receive the fifth information within a period of time, which indicates the second band after switching of the terminal device. Optionally, one period of time may be a number of symbols or a number of slots. For example, one time is three symbols or one slot.

[0227] In this application, the “lag time” may also be understood as a “time window”, a “period”, a “switching duration”, or a “time offset”. For example, in this application, the “lag time” may be preconfigured by the base station, for example, by using RRC signaling.

[0228] In an example, the fourth information may be a dynamically scheduled DCI. For example, a new bit may be added to the existing DCI 0_1 or DCI 0_0. The new bit indicates a start time when the DCI takes effect. The valid start time indicates that the corresponding channel parameters can be set only from the valid start time after the DCI is received. For example, the valid start time may be indicated by using an index of multiple time windows. The time window may also be understood as a lag time or a switching duration. For example, the time window may be pre-configured by the base station by using RRC signaling. For example, the network device may transmit the fifth information to the terminal device within the time window.

[0229] The terminal device may determine the band / carrier before switching and the band / carrier after switching based on the indication of the fourth information and the indication of the fifth information.

[0230] Based on the above technical solution, the network device uses the fourth information to indicate the start time at which the channel parameters are set after the DCI detected in the current slot is parsed, so that after obtaining the first DCI, the terminal device does not need to set the channel parameters urgently, but obtains the second DCI before the start time, and can comprehensively determine the transmission combination state of the target slot scheduled for transmission according to the two DCIs. Therefore, the parameters do not need to be set for the non-corresponding channels, so that the parameter reconfiguration problem is avoided.

[0231] Step 503: The network device sends the fourth information and the fifth information to the terminal device.

[0232] For example, the network device may transmit the dynamically scheduled fourth information and fifth information to the terminal device.

[0233] Step 504: The terminal device receives the fourth information and the fifth information sent by the network device, and sends uplink data in the switched band / carrier according to the fourth information and the fifth information.

[0234] In the example, it is assumed that the terminal device is currently using band #18 on channel #1 and band #20 on channel #2. The terminal device receives fourth information in slot #2. Based on the fourth information, the terminal device determines that the band after switching is band #18 and determines that the fifth information needs to be received in slot #2. The terminal device needs to determine the band after switching based on both the fourth information and the fifth information. The terminal device continues to receive the fifth information in slot #2, where the fifth information indicates that the band after switching of the terminal device is band #16. It is assumed that the terminal device supports band #18 and band #16 on channel #1 and band #20 and band #18 on channel #2. In this case, the terminal device may determine that band #18 needs to be switched to band #16 on channel #1 (e.g., fourth state) and band #20 needs to be switched to band #18 on channel #2 (e.g., fifth state) based on both the fourth information and the fifth information.

[0235] In another example, it is assumed that the terminal device is currently using band #18 on channel #1 and band #20 on channel #2. The terminal device receives fourth information in the first symbol in slot #2, and determines based on the fourth information that the band after switching is band #18 and that the parameters need to be set on channel #1 from the tenth symbol in slot #2. The terminal device receives fifth information between the second symbol and the ninth symbol in slot #2, and determines based on the fifth information that the band after switching is band #16. In this case, the terminal device may determine based on both the fourth information and the fifth information that band #18 needs to be switched to band #16 on channel #1 (e.g., fourth state) and band #20 needs to be switched to band #18 on channel #2 (e.g., fifth state).

[0236] It should be understood that the solution of this embodiment is also applicable to intra-band inter-carrier switching, which will not be described here by using examples.

[0237] In this application, the terminal device can determine the specific band and / or carrier to be interrupted and the band and / or carrier after switching by using the fourth information and the fifth information, thereby avoiding the problem of reconfiguring the band corresponding to the channel of the terminal device, and improving data transmission.

[0238] Optionally, it is assumed that the fourth information or the fifth information further includes a field #2. For example, if the terminal device is currently receiving the fourth information in slot #2 and the fourth information includes a field #2, the field #2 can instruct the terminal device to transmit data in the third symbol in the third slot, in other words, the terminal device can start transmitting data from the third symbol in slot #3 using band #16 and band #18. As another example, if the terminal device is currently receiving the fifth information in slot #2 and the fifth information includes a field #2, the field #2 can instruct the terminal device to transmit data in the third symbol in the third slot, in other words, the terminal device can start transmitting data from the third symbol in slot #3 using band #16 and band #18.

[0239] In this application, the terminal device can use the fourth and fifth information to determine the specific slot or specific symbol in which uplink data is transmitted by using the band / carrier after switching, so that after completing switching between states, the terminal device receives data in a specific slot according to the indication of field #2. This can avoid the terminal device receiving data before completing switching between states, thereby improving data transmission performance.

[0240] It can be understood that the examples of the methods 200 to 500 in the embodiments of the present application are merely intended to help those skilled in the art understand the embodiments of the present application, and are not intended to limit the embodiments of the present application to the specific scenarios in the examples. Certainly, those skilled in the art can make various equivalent modifications or changes based on the examples of the methods 200 to 500, and such modifications or changes also fall within the scope of the embodiments of the present application.

[0241] It may be further understood that some optional features in the embodiments of the present application may be independent of other features in some scenarios, or may be combined with other features in some scenarios, without being limited thereto.

[0242] It can be further understood that the embodiments described in this application can be independent solutions or can be combined based on inherent logic. All these solutions fall within the scope of protection of this application. In addition, the explanations and descriptions of terms in the embodiments may be mutually referenced or explained in the embodiments. This is not limited here.

[0243] It should be understood that "predefine" in this application may also be understood as "define," "predefine," "store," "prestore in advance," "prenegotiate," "preset," "harden," or "prewrite."

[0244] It can be understood that in this application, "when", "if", and "in the case of" all mean that the device performs the corresponding processing in an objective case, are not intended to limit the time, and the device does not necessarily have to perform a decisive action during implementation, and do not imply any other limitations.

[0245] The term "and / or" in this specification only indicates an association relationship to describe related objects, and indicates that three relationships may exist. For example, A and / or B may represent three cases: only A exists, both A and B exist, and only B exists. In addition, the character " / " in this specification generally indicates an "or" relationship between related objects.

[0246] The above describes the solutions provided in the embodiments of the present application from the perspective of interactions between nodes. It can be understood that, to implement the above functions, each node, such as a terminal device or a network device, includes a corresponding hardware structure and / or software module for performing each function. Those skilled in the art should recognize that the present application can be implemented by hardware or a combination of hardware and computer software in combination with the example units and algorithm steps described with reference to the embodiments disclosed herein. Whether the functions are performed by hardware or by hardware driven by computer software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but it should not be considered that the implementation goes beyond the scope of the present application.

[0247] In this embodiment of the present application, the functional modules of the terminal device and the network device may be divided according to the above method example. For example, each functional module may be obtained by division based on its corresponding function, or two or more functions may be integrated into one processing module. The integrated module may be implemented in the form of hardware, or may be implemented in the form of a software functional module. It should be noted that in the embodiment of the present application, the module division is an example, and is merely a logical function division. In actual implementation, other division methods may be used. The following is described by using an example in which each functional module is obtained by division based on its corresponding function.

[0248] 6 is a block diagram of a communication device 100 according to an embodiment of the present application. As shown, the device 100 may include a transceiver unit 110 and a processing unit 120.

[0249] In a possible design, the apparatus 100 may be a terminal device in the method embodiment, or a chip configured to implement the functions of the terminal device in the method embodiment. It should be understood that the apparatus 100 may correspond to the terminal device of the methods 200 to 500 in the embodiments of the present application, and the apparatus 200 may perform steps corresponding to the terminal device of the methods 200 to 500 in the embodiments of the present application.

[0250] In a possible implementation, the transceiver unit is configured to receive first information, and the processing unit is configured to control the transceiver unit to transmit uplink data on the switched band and / or carrier based on the first information.

[0251] In a possible implementation, the transceiver unit is adapted to transmit sixth information.

[0252] In a possible implementation, the transceiver unit is configured to receive second information, and the processing unit is configured to control the transceiver unit to transmit uplink data on the switched band and / or carrier based on the second information.

[0253] In a possible implementation, the transceiver unit is configured to receive second information, and the processing unit is configured to control the transceiver unit to transmit uplink data on the switched band and / or carrier based on the second information.

[0254] In a possible implementation, the transceiver unit is configured to receive third information, and the processing unit is configured to control the transceiver unit to transmit uplink data on the switched band and / or carrier based on the third information.

[0255] In a possible implementation, the transceiver unit is configured to receive fourth information, the processing unit is configured to control the transceiver unit to receive fifth information based on the fourth information, and the processing unit is configured to transmit uplink data on the switched band and / or carrier based on the fourth information and the fifth information.

[0256] In a possible implementation, the apparatus 100 may be a network device in the method embodiment, or may be a chip configured to implement the functions of the terminal device in the method embodiment. It should be understood that the apparatus 100 may correspond to the network device of the method 200 to the method 500 in the embodiment of the present application, and the apparatus 200 may perform steps corresponding to the network device of the method 200 to the method 500 in the embodiment of the present application.

[0257] In a possible implementation, the processing unit is configured to determine the first information and the transceiver unit is configured to transmit the first information.

[0258] In a possible implementation, the processing unit is configured to determine the second information and the transceiver unit is configured to transmit the second information.

[0259] In a possible implementation, the processing unit is configured to determine the third information and the transceiver unit is configured to transmit the third information.

[0260] In a possible implementation, the processing unit is configured to determine the fourth information and the fifth information, and the transceiver unit is configured to transmit the fourth information and the fifth information.

[0261] It should be further understood that the apparatus 100 herein is embodied in the form of a functional unit. The term "unit" herein may be an application-specific integrated circuit (ASIC), an electronic circuit, a processor (e.g., a shared processor, a dedicated processor, or a group processor) configured to execute one or more software or firmware, a memory, an integrated logic circuit, and / or other suitable components supporting the described functions. In any example, a person skilled in the art can understand that the apparatus 100 may specifically be a terminal device or a network device in the above embodiments, and may be configured to execute procedures and / or steps corresponding to the terminal device in the above method embodiments. To avoid repetition, details will not be described again here.

[0262] The device 100 of the above solution comprises functions to implement corresponding steps performed by a terminal device or a network device in the above method. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. For example, a transceiver unit may be replaced by a transceiver (e.g., a transmitting unit in a transceiver unit may be replaced by a transmitter, and a receiving unit in a transceiver unit may be replaced by a receiver device), and other units, e.g., a processing unit, may be replaced by a processor to separately perform transmitting and receiving operations and related processing operations in the method embodiments.

[0263] In addition, the transceiver unit 110 may alternatively be a transceiver circuit (which may include, for example, a receiving circuit and a transmitting circuit) and the processing unit may be a processing circuit.

[0264] It should be noted that the device in FIG. 6 may be a terminal device or a network device in the above embodiments, or may be a chip or a chip system, such as a system on chip (SoC). The transceiver unit may be an input / output circuit or a communication interface. The processing unit is a processor, a microprocessor, or an integrated circuit integrated on a chip. This is not limited here.

[0265] 7 is a block diagram of a communication device 200 according to an embodiment of the present application. As shown, the device 200 includes at least one processor 220. The processor 220 is coupled to a memory and configured to execute instructions stored in the memory to transmit and / or receive signals. Optionally, the device 200 further includes a memory 230 configured to store instructions. Optionally, the device 200 further includes a transceiver 210, where the processor 220 controls the transceiver 210 to transmit and / or receive signals.

[0266] It should be understood that the processor 220 and the memory 230 may be integrated into one processing device. The processor 220 is configured to execute program codes stored in the memory 230 to perform the above-mentioned functions. In a specific implementation, the memory 230 may alternatively be integrated into the processor 220 or may be separate from the processor 220.

[0267] It should be further understood that the transceiver 210 may include a transceiver (alternatively referred to as a receiver device) and a transmitter (alternatively referred to as a transmitter device). One or more antennas may be present. The transceiver 210 may be a communication interface or interface circuit.

[0268] Specifically, the transceiver 210 of the device 200 may correspond to the transceiver unit 110 of the device 100 , and the processor 220 of the device 200 may correspond to the processing unit 120 of the device 200 .

[0269] In the solution, the apparatus 200 is configured to perform the operations performed by the terminal device in the above method embodiments.

[0270] For example, the processor 220 is configured to execute computer programs or instructions stored in the memory 230 to perform the relevant operations performed by the radio access network device in the above method embodiments. For example, the processor is configured to execute the method performed by the terminal device in any one of the embodiments shown in the methods 200 to 500.

[0271] In another solution, the apparatus 200 is configured to perform the operations performed by the network device in the method embodiments described above.

[0272] For example, the processor 220 is configured to execute computer programs or instructions stored in the memory 230 to perform the relevant operations performed by the network device in the method embodiments described above. For example, the processor is configured to execute the method performed by the network device in any one of the embodiments shown in methods 200 to 500.

[0273] It should be understood that the specific process of each transceiver and each processor performing the above corresponding steps has been described in detail in the method embodiments, and for the sake of brevity, the details will not be described again here.

[0274] In the implementation process, the steps of the above method may be implemented by using a hardware integrated logic circuit in a processor or by using instructions in the form of software. The steps of the method disclosed with reference to the embodiments of the present application may be directly executed and completed by using 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 of the above method in combination with the hardware of the processor. To avoid repetition, the details will not be described again here.

[0275] It should be noted that the processor of the embodiments of the present application may be an integrated circuit chip and has signal processing capabilities. In the implementation process, the steps of the above method embodiments may be implemented by using hardware integrated logic circuits in the processor or by using instructions in the form of software. The above 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. The processor may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc. The steps of the methods disclosed with reference to the embodiments of the present application may be directly performed and completed by using a hardware decoding processor, or may be performed and completed by using a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium mature 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, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with the hardware of the processor.

[0276] It can be understood that the memory in the embodiments of the present application may be volatile or non-volatile memory, or may include both volatile 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, numerous 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), synchlink 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 memories as well as any other suitable types of memory.

[0277] According to the method provided in the embodiment of the present application, the present application further provides a computer program product, which stores a computer program code, which, when executed on a computer, can cause the computer to execute the method executed by a terminal device or a network device in any one of the embodiments of the method 200 to the method 500.

[0278] According to the method provided in the embodiment of the present application, the present application further provides a computer-readable medium, which stores a program code, and when the program code is executed on a computer, the computer can execute the method executed by the terminal device or the network device in the above embodiment.

[0279] According to the method provided in the embodiment of the present application, the present application further provides a communication system, which includes a terminal device and a network device, the terminal device is configured to perform steps corresponding to the terminal device in the above methods 200 to 500, and the network device is configured to perform steps corresponding to the network device in the above methods 200 to 500.

[0280] For the description and advantageous effects of any one of the related contents of the apparatus provided above, please refer to the corresponding method embodiments provided above, and the details will not be described again here.

[0281] All or part of the above embodiments may be implemented by software, hardware, firmware, or any combination thereof. When software is used to implement the embodiments, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded into a computer and executed, the procedures or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or 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 wave, or microwave) manner. The computer-readable storage medium may be any available medium accessible by a computer, or may be a data storage device incorporating one or more available media, such as a server or a data center. The usable media may be magnetic media (e.g., a floppy disk, a hard disk drive, or a magnetic tape), optical media (e.g., a high-density digital video disc (DVD)), semiconductor media (e.g., a solid-state drive (SSD)), and the like.

[0282] In the above device embodiments, the corresponding modules or units perform the corresponding steps. For example, a transceiver unit (transceiver) performs the receiving or transmitting step in the method embodiments, and steps other than the transmitting or receiving step can be performed by a processing unit (processor). For the functions of specific units, please refer to the corresponding method embodiments. There may be one or more processors.

[0283] As used herein, terms such as "component," "module," and "system" are used to denote computer-related entities, hardware, firmware, a combination of hardware and software, software, or software running. For example, a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer. As illustrated, both an application running on a computing device and the computing device may be components. One or more components may reside in a process and / or thread of execution, and a component may be located on one computer and / or distributed among two or more components. Additionally, these components may execute from various computer readable media having various data structures stored thereon. For example, a component may perform communications by using local and / or remote processes and based on signals having one or more data packets (e.g., data from two components interacting with other components on a local system or a distributed system, and / or data across a network such as the Internet interacting with other systems by using signals).

[0284] Those skilled in the art can realize that the units and algorithm steps in the examples described with reference to the embodiments disclosed herein may be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether a function is implemented by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but the implementation should not be considered to go beyond the scope of the present application.

[0285] As can be clearly understood by those skilled in the art, for convenience and concise description, the detailed operation processes of the above systems, devices and units can be referred to the corresponding processes in the above method embodiments, and the details will not be described again here.

[0286] In some embodiments provided in the present application, it should be understood that the disclosed system, device, and method may be implemented in other manners. For example, the embodiment of the device described is merely an example. For example, the division into units is merely a logical division of functions, and may be divided in other ways during 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. In addition, the shown or discussed mutual couplings or direct couplings or communication connections may be implemented through some interface. Indirect couplings or communication connections between devices or units may be implemented in electronic, mechanical, or other forms.

[0287] The units indicated as separate components may or may not be physically separated, and the components 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 goal of the solution of the embodiment.

[0288] Furthermore, the functional units in the embodiments of the present application may be integrated into one processing unit, each of the units may exist physically alone, or two or more units may be integrated into one unit.

[0289] When the functions are implemented 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 solution of the present application may be essentially implemented in the form of a software product, or the part of the technical solution may be implemented 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, a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present 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.

[0290] It should be understood that the term "embodiment" used throughout this specification means that the particular feature, structure, or characteristic associated with this embodiment is included in at least one embodiment of the present application. Thus, embodiments throughout the specification do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics may be grouped together in any manner in one or more embodiments.

[0291] Furthermore, it should be understood that ordinals such as "first" and "second" in the embodiments of the present application are used to distinguish between multiple objects, but are not intended to limit the size, content, order, time sequence, priority, importance, etc. of the multiple objects. For example, the first PDSCH and the second PDSCH may be the same or different physical channels. In addition, the names do not indicate different information amounts, contents, priorities, or importance of the two physical channels.

[0292] Further, as used herein, it should be understood that "at least one" means one or more, and "plurality" means two or more. "At least one item" or similar expressions means one item or more items, i.e., any combination of these items, including any combination of singular items or multiple items. For example, at least one of a, b, or c can refer to a, b, c, a and b, a and c, b and c, and a, b, and c.

[0293] Furthermore, in the embodiments of the present application, it should be understood that "B corresponding to A" indicates that B is associated with A, and B can be determined based on A. However, it should be further understood that determining B based on A does not mean that B is determined based only on A. B may alternatively be determined based on A and / or other information.

[0294] The above description is merely a specific implementation of the present application, and is not intended to limit the scope of protection of the present application. Any variations or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should fall within the scope of protection of the present application. Therefore, the scope of protection of the present application should be subject to the scope of protection of the claims.

[0295] This application claims priority to Chinese Patent Application No. 202210346423.3, entitled "COMMUNICATION METHOD AND APPARATUS," filed with the State Intellectual Property Office of the People's Republic of China on March 31, 2022, which is incorporated herein by reference in its entirety.

Claims

1. receiving first information from a network device by a terminal device, the first information including N information blocks, a j-th information block among the N information blocks including a first field, the first field indicating a band and / or carrier after switching of the terminal device, the j-th information block being associated with a band and / or carrier before switching of the terminal device, where N is a positive integer; transmitting uplink data in the switched band and / or carrier by the terminal device based on the first information; A communication method comprising:

2. The j-th information block further includes a second field, the second field indicating a time offset between the first information and the uplink data scheduled by the first information, the uplink data being transmitted in the band and / or carrier after the switching. The method of claim 1.

3. The method comprises: and transmitting, by the terminal device, sixth information to the network device, the sixth information being used by the network device to determine the first information, wherein: the sixth information including a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being such that the terminal device supports a first number of radio frequency chains transmitted in a band of a first band group, and the second state being such that the terminal device supports a second number of radio frequency chains transmitted in a band of a second band group; The sixth information includes at least a switching delay of the switching of the terminal device between the first state and the second state, the first state being for the terminal device to support the first number of radio frequency chains transmitted in bands of the first band group and the second state being for the terminal device to support the second number of radio frequency chains transmitted in bands of the second band group; and / or The sixth information includes at least an inter-band switching correspondence in case of switching of the terminal device from at least one first band to at least one second band. The method according to claim 1 or 2.

4. receiving second information from a network device by a terminal device, the second information including M information blocks, a k-th information block among the M information blocks being associated with a band pair of the terminal device, the band pair including a pre-switching band of the terminal device and a post-switching band of the terminal device, where M is a positive integer; transmitting uplink data in the switched band based on the second information by the terminal device; A communication method comprising:

5. The k-th information block further includes a third field, the third field indicating the switched carrier of the terminal device; The method according to claim 4.

6. The k-th information block includes a second field, the second field indicating a time offset between the second information and uplink data scheduled by the second information, and the uplink data is transmitted in the band or carrier after the switching. The method according to claim 4 or 5.

7. The method comprises: and transmitting, by the terminal device, sixth information to the network device, the sixth information being used by the network device to determine the second information, wherein: the sixth information including a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being such that the terminal device supports a first number of radio frequency chains transmitted in a band of a first band group, and the second state being such that the terminal device supports a second number of radio frequency chains transmitted in a band of a second band group; The sixth information includes at least a switching delay of the switching of the terminal device between the first state and the second state, the first state being for the terminal device to support the first number of radio frequency chains transmitted in bands of the first band group and the second state being for the terminal device to support the second number of radio frequency chains transmitted in bands of the second band group; and / or The sixth information includes at least an inter-band switching correspondence in case of switching of the terminal device from at least one first band to at least one second band.

4. The method according to any one of claims 1 to 3.

8. receiving third information from a network device by a terminal device, the third information including a first field, the first field indicating a band and / or carrier after switching of the terminal device, the band and / or carrier before switching being determined by the terminal device according to a preset rule, or the band and / or carrier before switching being indicated by the network device; transmitting uplink data in the switched band and / or carrier by the terminal device based on the third information; A communication method comprising:

9. The third information further includes a second field, the second field indicating a time offset between the third information and uplink data scheduled by the third information, the data being transmitted in the band and / or carrier after the switching. The method according to claim 8.

10. the third information further includes a fourth field, the fourth field indicating a second table in which the time offset is located, or the fourth field indicating a position or index of the time offset in a first table.

10. The method according to claim 8 or 9.

11. The method comprises: and transmitting, by the terminal device, sixth information to the network device, the sixth information being used by the network device to determine the third information, wherein: the sixth information including a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being such that the terminal device supports a first number of radio frequency chains transmitted in a band of a first band group, and the second state being such that the terminal device supports a second number of radio frequency chains transmitted in a band of a second band group; The sixth information includes at least a switching delay of the switching of the terminal device between the first state and the second state, the first state being for the terminal device to support the first number of radio frequency chains transmitted in bands of the first band group and the second state being for the terminal device to support the second number of radio frequency chains transmitted in bands of the second band group; and / or The sixth information includes at least an inter-band switching correspondence in case of switching of the terminal device from at least one first band to at least one second band.

11. The method according to any one of claims 8 to 10.

12. receiving, by a terminal device, fourth information from a network device, the fourth information including a fifth field, the fifth field indicating a first band after switching of the terminal device; The fourth information further includes a sixth field, the sixth field instructing the terminal device to receive fifth information, and the fifth information indicating a second band after the switching of the terminal device; receiving, by the terminal device, the fifth information, the fifth information indicating the second band after the switching of the terminal device; and transmitting uplink data in the switched band based on the fourth information and the fifth information by the terminal device; or The fourth information further includes a seventh field, the seventh field indicating a lag time for the fifth field to take effect; transmitting, by the terminal device, the uplink data in the switched band based on the fourth information. Communication methods.

13. The method comprises: and transmitting, by the terminal device, sixth information to the network device, the sixth information being used by the network device to determine the fourth information, wherein: the sixth information including a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being such that the terminal device supports a first number of radio frequency chains transmitted in a band of a first band group, and the second state being such that the terminal device supports a second number of radio frequency chains transmitted in a band of a second band group; The sixth information includes at least a switching delay of the switching of the terminal device between the first state and the second state, the first state being for the terminal device to support the first number of radio frequency chains transmitted in bands of the first band group and the second state being for the terminal device to support the second number of radio frequency chains transmitted in bands of the second band group; and / or The sixth information includes at least an inter-band switching correspondence in case of switching of the terminal device from at least one first band to at least one second band. The method of claim 12.

14. determining first information by a network device, the first information including N information blocks, a j-th information block among the N information blocks including a first field, the first field indicating a band and / or carrier after switching of a terminal device, the j-th information block being associated with a band and / or carrier before switching of the terminal device, where N is a positive integer; transmitting, by the network device, the first information to the terminal device; A communication method comprising:

15. The j-th information block further includes a second field, the second field indicating a time offset between the first information and the uplink data scheduled by the first information, the uplink data being transmitted in the band and / or carrier after the switching. The method of claim 14.

16. The method comprises: receiving, by the network device, sixth information from the terminal device, the sixth information being used by the network device to determine the first information, wherein: the sixth information including a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being such that the terminal device supports a first number of radio frequency chains transmitted in a band of a first band group, and the second state being such that the terminal device supports a second number of radio frequency chains transmitted in a band of a second band group; The sixth information includes at least a switching delay of the switching of the terminal device between the first state and the second state, the first state being for the terminal device to support the first number of radio frequency chains transmitted in bands of the first band group and the second state being for the terminal device to support the second number of radio frequency chains transmitted in bands of the second band group; and / or The sixth information includes at least an inter-band switching correspondence in case of switching of the terminal device from at least one first band to at least one second band.

16. The method according to claim 14 or 15.

17. determining second information by the network device, the second information including M information blocks, a k-th information block among the M information blocks being associated with a band pair of a terminal device, the band pair including a pre-switching band of the terminal device and a post-switching band of the terminal device, where M is a positive integer; transmitting, by the network device, the second information to the terminal device; A communication method comprising:

18. The k-th information block further includes a third field, the third field indicating the switched carrier of the terminal device; 20. The method of claim 17.

19. The k-th information block includes a second field, the second field indicating a time offset between the second information and uplink data scheduled by the second information, and the uplink data is transmitted in the band or carrier after the switching.

19. The method according to claim 17 or 18.

20. The method comprises: and receiving, by the network device, sixth information from the terminal device, the sixth information being used by the network device to determine the second information, wherein: the sixth information including a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being such that the terminal device supports a first number of radio frequency chains transmitted in a band of a first band group, and the second state being such that the terminal device supports a second number of radio frequency chains transmitted in a band of a second band group; The sixth information includes at least a switching delay of the switching of the terminal device between the first state and the second state, the first state being for the terminal device to support the first number of radio frequency chains transmitted in bands of the first band group and the second state being for the terminal device to support the second number of radio frequency chains transmitted in bands of the second band group; and / or The sixth information includes at least an inter-band switching correspondence in case of switching of the terminal device from at least one first band to at least one second band.

20. The method according to any one of claims 17 to 19.

21. determining third information by a network device, the third information including a first field, the first field indicating a band and / or carrier after switching of a terminal device, the band and / or carrier before switching being determined by the terminal device according to a preset rule, or the band and / or carrier before switching being indicated by the network device; transmitting, by the network device, the third information to the terminal device; A communication method comprising:

22. The third information further includes a second field, the second field indicating a time offset between the third information and uplink data scheduled by the third information, the data being transmitted in the band and / or carrier after the switching.

22. The method of claim 21.

23. the third information further includes a fourth field, the fourth field indicating a second table in which the time offset is located, or the fourth field indicating a position or index of the time offset in a first table.

23. The method of claim 21 or 22.

24. The method comprises: and receiving, by the network device, sixth information from the terminal device, the sixth information being used by the network device to determine the third information, wherein: the sixth information including a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being such that the terminal device supports a first number of radio frequency chains transmitted in a band of a first band group, and the second state being such that the terminal device supports a second number of radio frequency chains transmitted in a band of a second band group; The sixth information includes at least a switching delay of the switching of the terminal device between the first state and the second state, the first state being for the terminal device to support the first number of radio frequency chains transmitted in bands of the first band group and the second state being for the terminal device to support the second number of radio frequency chains transmitted in bands of the second band group; and / or The sixth information includes at least an inter-band switching correspondence in case of switching of the terminal device from at least one first band to at least one second band.

24. A method according to any one of claims 21 to 23.

25. determining fourth information by the network device, the fourth information including a fifth field, the fifth field indicating a first band after switching of the terminal device; The fourth information further includes a sixth field, the sixth field instructing the terminal device to receive fifth information, and the fifth information indicating a second band after the switching of the terminal device; or the fourth information further includes a seventh field, the seventh field indicating a lag time for the fifth field to take effect; transmitting, by the network device, the fourth information and the fifth information to the terminal device; A communication method comprising:

26. The method comprises: receiving, by the network device, sixth information from the terminal device, the sixth information being used by the network device to determine the fourth information, wherein: the sixth information including a correspondence between at least one channel of the terminal device and a band supported by the at least one channel; the sixth information includes at least a switching correspondence between bands in case of switching of the terminal device between a first state and a second state, the first state being such that the terminal device supports a first number of radio frequency chains transmitted in a band of a first band group, and the second state being such that the terminal device supports a second number of radio frequency chains transmitted in a band of a second band group; The sixth information includes at least a switching delay of the switching of the terminal device between the first state and the second state, the first state being for the terminal device to support the first number of radio frequency chains transmitted in bands of the first band group and the second state being for the terminal device to support the second number of radio frequency chains transmitted in bands of the second band group; and / or The sixth information includes at least an inter-band switching correspondence in case of switching of the terminal device from at least one first band to at least one second band.

26. The method of claim 25.

27. A processor and a memory, the memory is configured to store computer programs or instructions; The processor is configured to execute the computer program or the instructions in the memory to perform a method according to any one of claims 1 to 3, claims 4 to 7, claims 8 to 11, claims 12 and 13, claims 14 to 16, claims 17 to 20, claims 21 to 24, or claims 25 and 26. Communications equipment.

28. Store a computer program; The computer program, when executed on a computer, enables the computer to carry out the methods according to any one of claims 1 to 3, claims 4 to 7, claims 8 to 11, claims 12 and 13, claims 14 to 16, claims 17 to 20, claims 21 to 24 or claims 25 and 26. A computer-readable storage medium.

29. A computer program product comprising instructions for carrying out the method according to any one of claims 1 to 3, claims 4 to 7, claims 8 to 11, claims 12 and 13, claims 14 to 16, claims 17 to 20, claims 21 to 24 or claims 25 and 26.

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