Communication methods and devices

Abstract

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

Description

Technical Field

[0001] Embodiments of the present application relate to the field of communications, and more specifically, to communication methods and devices.

Background Art

[0002] Currently, when a terminal device switches its state, the following scenario may occur: For example, the state where the terminal device transmits a radio frequency chain in slot #1 is state #1 (for example, state #1 means 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 bands to be used when the terminal device switches to state #2 (for example, DCI #1 instructs to use band #A, and DCI #2 instructs to use band #C).

[0003] The terminal device cannot process two downlink control information simultaneously. Therefore, for example, the terminal device can first process the first downlink control information and then process the second downlink control information. In this case, the terminal device can determine the band indicated by the corresponding downlink control information by referring to the default state #1 before switching. For example, the terminal device still uses band #A in channel #1 and band #C in channel #2 and starts to set channel parameters. However, it is possible that channel #2 of the terminal device does not support band #C. In this case, the terminal device needs to cancel the previously set channel parameters and reset the channel parameters. Therefore, the processing delay of the terminal device is prolonged. Therefore, a method to avoid resetting the band corresponding to the channel and shorten the processing delay of the terminal device has become an urgent problem to be solved

Summary of the Invention

[0004] Embodiments of the present invention provide a communication method and apparatus. The network device indicates the band and / or carrier before the terminal device switches and the band and / or carrier after the terminal device switches, so that the terminal device can clearly acquire a specific band and / or carrier to interrupt and switch to a target frequency band and / or carrier. This avoids the problem of reconfiguring the band corresponding to the channel of the terminal device, reduces processing delay of the terminal device, and improves data transmission performance.

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

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

[0007] In this application, the phrase "the j-th information block is associated with the band and / or carrier before the terminal device is switched" should be understood as meaning that the network device can establish a correspondence between each of the N information blocks and the band and / or carrier for the terminal device by using RRC signaling, or that the correspondence between each of the N information blocks and the band and / or carrier is predefined. For example, the correspondence between the locations 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 be understood as the band and / or carrier currently in use 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, the "field" referred to may represent various contents, or it may be understood as the information (e.g., bits) carried in the field representing the corresponding content. The "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 the first information block from the N information blocks, the first information block includes a first identifier, the first identifier indicates the target band and / or carrier, the terminal device determines the source band and / or carrier based on the position of the first information block in the N information blocks, and the terminal device switches 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 may be implicitly associated with the band and / or carrier before switching of the terminal device, and the first field in each information block may indicate the band and / or carrier after switching, thereby allowing the terminal device to determine the specific band / carrier to be interrupted and switch to the target frequency band / carrier. This avoids the problem of reconfiguring the band corresponding to the channel of the terminal device, reduces processing delay of the terminal device, and improves data transmission performance.

[0012] In a possible implementation, 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 on the switched band and / or carrier.

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

[0014] In this application, "uplink data" can also be understood as uplink data located on the switched band and / or carrier. That is, a terminal device may transmit uplink data on the switched band and / or carrier.

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

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

[0017] In this application, “bands in the first band group” may be understood as at least one first band, and “bands in the second band group” may be understood as at least one second band. In this case, the first state can be understood as the terminal device supporting a first number of radio frequency chains transmitted on at least one first band, and the second state can be understood as the terminal device supporting a second number of radio frequency chains transmitted on at least one second band.

[0018] In this application, when a terminal device is switched from at least one first band to at least one second band, the interband switching correspondence can be understood as switching of the terminal device from the first first band to the first second band. Specifically, it can be understood as the corresponding switching from the first first band to the first second band, the corresponding switching from the second first band to the second second band, and so on.

[0019] In this application, the reporting of a switching delay between the first and second states by a terminal device can be understood as the ability of the terminal device to perform switching between the first and second states, that is, it implicitly indicates a switching correspondence between the first and second states.

[0020] Based on the technical solution described above, the present invention allows a terminal device to report to a network device the bands supported by each channel, or the corresponding switching correspondence between bands when switching is performed between states, thereby enabling the network device to clearly indicate the specific band to which the terminal device needs to be switched to a target band. This avoids the problem of reconfiguring the bands corresponding to the terminal device's channels, reduces processing delays for the terminal device, and improves data transmission performance. In addition, the terminal device may further report the switching delays required for switching between states, so that the network device can determine the scheduled uplink data.

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

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

[0023] The above technical solution can also be understood as follows: The terminal device receives second information from the network device, the second information contains 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 the 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, the second information block corresponds to band pair #2, and so on. The correspondence between the band pair and each of the M information blocks may be transmitted to the terminal device by the network device using RRC signaling, or it 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 for the terminal device by using RRC signaling.

[0024] Based on the technical solution described above, in this application, each information block within the second information can be implicitly associated with a band pair, i.e., the band before switching and the band after switching, thereby allowing the terminal device to determine the specific band / carrier to be interrupted and switch to the target frequency band / carrier. This avoids the problem of reconfiguring the band corresponding to the terminal device's channel, reduces processing delay in the terminal device, and improves data transmission performance.

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

[0026] Based on the above technical solution, in this application, each information block in the second information may further indicate the carrier after the 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 the data transmission performance.

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

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

[0029] In a possible implementation, the method further comprises: a terminal device transmitting a sixth information to a network device, the sixth information being used by the network device to determine a second information, the sixth information including a correspondence between at least one channel of the terminal device and the bands supported by at least one channel; the sixth information including at least a switching correspondence between bands in the case of switching of the terminal device between a first state and a second state, the first state being a first number of radio frequency chains transmitted within the bands of a first band group, and the second state being a second band group The sixth information includes, at least, a switching delay of the terminal device switching between a first state and a second state, wherein the first state is a terminal device supporting a first number of radio frequency chains transmitted in the bands of a first band group, and the second state is a terminal device supporting a second number of radio frequency chains transmitted in the bands of a 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.

[0030] Based on the technical solution described above, the present invention allows a terminal device to report to a network device the bands supported by each channel, or the corresponding switching correspondence between bands when switching is performed between states, thereby enabling the network device to clearly indicate the specific band to which the terminal device needs to be switched to a target band. This avoids the problem of reconfiguring the bands corresponding to the terminal device's channels, reduces processing delays for the terminal device, and improves data transmission performance. In addition, the terminal device may further report the switching delays 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 can be executed by a terminal device (e.g., a user device), or can be executed by a component (e.g., a chip or a circuit) of the terminal device. This is not limited here.

[0032] The method includes: the terminal device receiving third information from a network device, where the third information includes a first field, and the first field indicates the band and / or carrier after switching of the terminal device, and the band and / or carrier before switching is determined by the terminal device according to a pre-set rule, or the band and / or carrier before switching is indicated by the network device; and the terminal device transmitting data using 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. Thus, the terminal device determines the specific band / carrier to be interrupted and switches to the target frequency band / carrier. Thereby, the problem of resetting the band corresponding to the channel of the terminal device is avoided, the processing delay of the terminal device is reduced, and the data transmission performance is improved.

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

[0035] Based on the above technical solution, in this application, the terminal device can determine a specific slot or symbol on which uplink data is transmitted by using a switched band / carrier, by using third information, thereby allowing the terminal device to receive data in the specific slot based on the indication of the second field after completing the switching between states. This improves data transmission performance because it avoids the terminal device receiving data before completing the switching between states.

[0036] In a possible implementation, 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 the location or index of the time offset within 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 to which data is transmitted based on the instructions of the network device.

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

[0039] Based on the technical solution described above, in this application, a terminal device can report to a network device the bands supported by each channel, or the corresponding switching correspondence between bands when switching is performed between states, thereby allowing the network device to clearly indicate the specific band to which the terminal device needs to be switched to a target band. This avoids the problem of reconfiguring the bands corresponding to the channels of the terminal device, reduces processing delay of the terminal device, and improves data transmission performance.

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

[0041] The method includes: the terminal device receiving fourth information from the network device, the fourth information including a fifth field, the fifth field indicating the first band after switching of the terminal device; the fourth information further including a sixth field, the sixth field instructing the terminal device to receive fifth information, and the fifth information indicating the second band after switching of the terminal device. The terminal device transmits uplink data on the switched bands based on the fourth and fifth information. Alternatively, the fourth information further includes a seventh field, the seventh field indicating the lag time for the fifth field to take effect. The terminal device transmits uplink data on the switched bands based on the fourth information.

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

[0043] Based on the above technical solution, in this application, a network device may instruct a terminal device to wait for a fifth piece of information after the terminal device has received a fourth piece of information, and then determine the band before and after switching based on both the fourth and fifth pieces of information. Alternatively, there is an effective lag time within the first band indicated by the fourth piece of information after switching. Specifically, after the terminal device receives the fourth piece of information, the terminal device does not immediately perform parameter setting, and the network device further transmits the fifth piece of information while the terminal device is waiting, and finally, the terminal device can determine the band before and after switching based on both the fourth and fifth pieces of 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 processing delay of the terminal device, and improves data transmission performance.

[0044] In a possible implementation, the method further includes: the terminal device transmitting sixth information to a network device, the sixth information being used by the network device to determine fourth information, the sixth information including a correspondence between at least one channel of the terminal device and the bands supported by at least one channel; the sixth information including at least a switching correspondence between bands in the case of switching of the terminal device between a first state and a second state, the first state being a first number of radio frequency chains transmitted within the bands of a first band group, and the second state being a second band group The sixth information includes, at least, a switching delay of the terminal device switching between a first state and a second state, wherein the first state is a terminal device supporting a first number of radio frequency chains transmitted in the bands of a first band group, and the second state is a terminal device supporting a second number of radio frequency chains transmitted in the bands of a 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 technical solution described above, the present invention allows a terminal device to report to a network device the bands supported by each channel, or the corresponding switching correspondence between bands when switching is performed between states, thereby enabling the network device to clearly indicate the specific band to which the terminal device needs to be switched to a target band. This avoids the problem of reconfiguring the bands corresponding to the terminal device's channels, reduces processing delays for the terminal device, and improves data transmission performance. In addition, the terminal device may further report the switching delays required for switching between states, so that the network device can determine the scheduled uplink data.

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

[0047] For information on the advantages of technical solutions on the network side and the advantages of devices, please refer to the description of the advantages on the terminal side. Further details are not provided here.

[0048] The method includes: a network device determining first information, which consists of N information blocks, the j-th information block of which contains a first field, the first field indicating the band and / or carrier after switching of the terminal device, and the j-th information block being associated with the 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 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 on the switched band and / or carrier.

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

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

[0052] The method includes: a network device determining second information, which consists of M information blocks, the k-th information block among the M information blocks being associated with a band pair of a terminal device, the band pair consisting of the terminal device's pre-switching band and the terminal device's post-switching band, 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, the third field indicating the carrier after switching of the terminal device.

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

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

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

[0057] The method includes: a network device determining third information, the third information comprising a first field, the first field indicating the band and / or carrier of the terminal device after switching, the band and / or carrier before switching being determined by the terminal device according to pre-set rules, 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, and the data is transmitted on the switched band and / or carrier.

[0059] In a possible implementation, 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 the location or index of the time offset within the first table.

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

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

[0062] The method involves the network device determining the fourth piece of information, which includes a fifth field, the fifth field indicating the first band after switching of the terminal device; the fourth piece of information further includes a sixth field, the sixth field instructing the terminal device to receive the fifth piece of information, the fifth piece of information indicating the second band after switching of the terminal device. Alternatively, the fourth piece of information further includes a seventh field, the seventh field indicating the lag time for the fifth field to take effect. The terminal device receives the fifth piece of information within this period, and the fifth piece of information indicates the second band after switching of the terminal device. The network device transmits the fourth and fifth pieces of information to the terminal device.

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

[0064] A communication device is provided in accordance with the ninth aspect. The device is configured to perform a method in any one of the possible implementations of the first through fourth aspects. Specifically, the device may include units and / or modules, such as transceiver units and / or processing units, configured to perform a method in accordance with any one of the possible implementations of the first through 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 embodiments, the device is a chip, chip system, or circuit used in a terminal device. If the device 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, pins, 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] A communication device is provided in accordance with the tenth aspect. The device is configured to perform a method in any one of the possible implementations of the fifth through eighth aspects. Specifically, the device may include units and / or modules, such as transceiver units and / or processing units, configured to perform a method in accordance with any one of the possible implementations of the fifth through eighth aspects.

[0068] In implementation, the device is a network 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.

[0069] In other embodiments, the device is a chip, chip system, or circuit used in a network device. If the device 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.

[0070] A communication device is provided according to the eleventh aspect. The device includes at least one processor configured to execute a computer program or instruction stored in memory to perform a method in any one of the possible implementations of any one of the first to fourth aspects. Optionally, the device further includes memory configured to store computer programs or instructions. Optionally, the device further includes a communication interface through which the processor reads computer programs or instructions stored in memory.

[0071] In practice, the device is a terminal device.

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

[0073] A communication device is provided in accordance with the twelfth aspect. The device includes at least one processor configured to execute a computer program or instruction stored in memory to perform a method in any one of the possible implementations of the fifth through eighth aspects. Optionally, the device further includes memory configured to store computer programs or instructions. Optionally, the device further includes a communication interface through which the processor reads computer programs or instructions stored in memory.

[0074] In practice, the device is a network device.

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

[0076] In accordance with the thirteenth aspect, the present application provides a processor comprising an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, thereby the processor performs a method in any one of the possible implementations of any one of the first through 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 by, for example, a transceiver, but not limited to that, and the signal output by the output circuit may be output and transmitted by, for example, a transmitter, but not limited to that, and the input circuit and the output circuit may be the same circuit, in which case the circuit is used as an input circuit and an output circuit at different moments. Specific implementations of the processor and various circuits are not limited to the embodiments of this application.

[0078] Unless otherwise specified, or where the operation of the processor, such as transmit and acquire / receive, does not contradict the actual function or internal logic in the relevant description, the operation may be understood as an output, receive, and input operation performed by the processor, or as a transmit and receive operation performed by the radio frequency circuit and antenna. This is not limited to the present invention.

[0079] A processing device including a processor and memory is provided in accordance with the fourteenth aspect. The processor is configured to read instructions stored in memory, receive signals through a transceiver, and transmit signals through a transmitter in order to perform a method in any one of the possible implementations of any one of the first through eighth aspects.

[0080] Arbitrarily, there is one or more processors and one or more memory locations.

[0081] Optionally, the memory may be integrated with the processor, or the memory and processor may be arranged separately.

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

[0083] It should be understood that related data exchange processes, such as the transmission of instruction information, may be processes in which the processor outputs instruction information, and the reception of capability information may be processes in which the processor receives input capability information. Specifically, the data output by the processor may be output to a transmitter, and the input data received by the processor may be from a transceiver. Transmitters and transceivers are sometimes collectively referred to as transceivers.

[0084] The processing device for the 14th aspect may be one or more chips. The processor within the processing device may be implemented by hardware or by software. If the processor is implemented by hardware, it may be a logic circuit, an integrated circuit, etc. If the processor is implemented by software, it may be a general-purpose processor and is implemented by reading software code stored in memory. The memory may be integrated into the processor or located outside the processor and exist independently.

[0085] A computer-readable storage medium is provided in accordance with the 15th aspect. The computer-readable storage medium stores program code to be executed by a device, and the program code is used to execute a method in any one of the possible implementations of the first through eighth aspects.

[0086] A computer program product containing instructions is provided in accordance with the sixteenth aspect. When the computer program product is executed on a computer, the computer can perform any one of the possible implementations of the first through eighth aspects.

[0087] In accordance with Aspect 17, a chip system is provided which includes a processor configured to call a computer program from memory and execute the computer program, thereby enabling a device on which the chip system is installed to perform a method in any one of the possible implementations of Aspects 1 through 8.

[0088] A communication system is provided in accordance with the 18th aspect. The communication system includes terminal devices and network devices. The terminal devices are configured to perform the methods of any one of the first to fourth aspects, and the network devices are configured to perform the methods of any one of the fifth to eighth aspects. [Brief explanation of the drawing]

[0089] [Figure 1] This is a diagram illustrating a scenario to which this application applies. [Figure 2] This is a schematic flowchart of communication method 200 according to the present invention. [Figure 3] This is a diagram of an information block within the first information according to the present invention. [Figure 4] This is a diagram of an information block within the second information in accordance with the present invention. [Figure 5] This is a diagram of the third piece of information in accordance with the present application. [Figure 6] This is a block diagram of a communication device 100 according to the present invention. [Figure 7] This is a block diagram of a communication device 200 according to the present invention. [Modes for carrying out the invention]

[0090] The following describes the technical solution of the embodiment of this application with reference to the attached drawings.

[0091] The wireless communication systems to which embodiments of this 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-A) systems, next-generation communication systems (e.g., 6G communication systems), systems of multiple access systems convergence, or advanced systems.

[0092] The technical solutions provided herein may be further 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, the Internet of Vehicles. Communication methods in Internet of Vehicle systems are collectively referred to as vehicle-to-X (V2X, where X represents anything). For example, V2X may include vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, or vehicle-to-network (V2N) communication.

[0093] The terminal devices in the embodiments of this application may include various access terminals, mobile devices, user terminals, or user equipment equipped with wireless communication capabilities. For example, the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal device, or an augmented reality (AR) terminal device, which are user equipment (UEs). Terminal devices may also include, alternatively, wireless terminals in industrial control, machine-type communication (MTC) terminals, customer premises equipment (CPE), wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, smart homes, cellular telephones, cordless telephones, session initiation protocol (SIP) telephones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, terminal devices in future advanced public land mobile networks (PLMN), and the like.

[0094] In embodiments of the present application, the network device (e.g., a wireless access network device) may be an access device for a terminal device to access a mobile communication system wirelessly. The wireless 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 wireless relay node, a wireless backhaul node, a transmission point (TP) or transmission reception point (TRP), a macro base station or a micro base station, a high-frequency base station, etc. Alternatively, the wireless access network device may be a next-generation NodeB (gNB) in an NR system, or a component or some 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 specific device form used for the wireless access network device are not limited in embodiments of the present application. In this application, a wireless access network device is simply referred to as a network device. Unless otherwise specified, all network devices in this application are wireless access network devices. In this application, a network device may be the network device itself, or it may be a chip used in the network device to implement wireless communication processing functions.

[0095] It should be understood that the scenario shown in Figure 1 is merely one example of a scenario in which the technical solution of the present invention may be used. The present invention does not exclude other scenarios in which terminal devices need to be switched between multiple frequency bands. That is, the technical solution of the present invention may be applied to scenarios in which various terminal devices need to be switched between multiple frequency bands.

[0096] In 5G new radio (NR) systems, network devices (e.g., base stations) can transmit radio waves over very long distances by using high transmission power. However, terminal devices have very low transmission power, resulting in limited uplink coverage. 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. Consequently, it is not feasible to rely on data retransmission to guarantee the uplink coverage performance of the uplink transmission signal.

[0097] Figure 1 illustrates a scenario in which the technical solution of the present invention is applied. As shown in Figure 1, supplementary uplinks (SULs) are currently introduced in NR as an alternative when uplink coverage is insufficient in the NR system. Since the lower frequency bands of long-term evolution (LTE) generally offer better coverage, it is conceivable that carriers use the lower frequency bands of LTE (e.g., 700 MHz, 1.8 GHz, or 2.1 GHz) for NR uplink transmission for SULs. Currently, when performing NR transmission by using LTE frequency bands, terminal devices can reuse the frequency bands through LTE uplink time division duplex (TDD). Specifically, if a terminal device is within the coverage of the TDD mid-frequency bands (2.6GHz, 3.5GHz, or 4.9GHz), the terminal device will use the TDD mid-frequency bands. Conversely, if the terminal device moves outside the coverage of the TDD mid-frequency bands (2.6GHz, 3.5GHz, or 4.9GHz), the terminal device may use the lower frequency bands of LTE for the uplink. This compensates for the weakness of the TDD mid-frequency band uplink coverage and extends it. Indeed, with future advancements, terminal devices may also use other frequency bands for the uplink as additional uplinks to further extend uplink coverage.

[0098] It can 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 lower frequency band of LTE (e.g., 700 MHz / 800 MHz / 900 MHz, 1.8 GHz, or 2.1 GHz). The carrier can be understood as a SUL frequency band. 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 state or load state of the corresponding frequency band.

[0099] To help understand the technical solution of this application, some technical terms used in this application are briefly explained below.

[0100] Phase-locked loop (PLL) switching delay: Typically, it takes about 300 milliseconds to relock a phase-locked loop to a frequency band. Specifically, if a phase-locked loop for a frequency band is closed, such a switching delay is required to relock the phase-locked loop to another frequency band or to open a new phase-locked loop.

[0101] The transmitter channel (TX) is sometimes called a "radio frequency (RF) transmitter channel," which can also be simply referred to as a "transmitter channel." In this application, the transmitter channel may, but is not limited to, operate in the following ways: it may receive a baseband signal from a baseband chip, perform radio frequency processing (e.g., upconversion, 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 transmitter channel may include electronic devices such as an antenna switch, antenna tuner, low noise amplifier (LNA), power amplifier (PA), mixer, local oscillator (LO), and filter. These electronic devices may be incorporated into one or more chips depending on the requirements. An antenna may also sometimes be considered part of the transmitter channel.

[0102] The term “channel” as used in the following embodiments of this application may also be understood as a “radio frequency chain.” The radio frequency chain of this application may also be replaced by a Tx, antenna, radio frequency, transmit channel, transmit port, receive channel, or any combination thereof. Further details are not described below.

[0103] It should be understood that the term "band" as used in the embodiments of this application may also be understood as a "frequency band," "frequency," or "spectrum." Alternatively, the "frequency band" in this application may be understood as a component carrier (CC) (which may also be simply called a "carrier"), and thus the technical solution of this application is fully applicable to "carriers" as well. In the following embodiments of this application, "band" is used primarily as an example for descriptive purposes.

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

[0105] In embodiments of this application, “switching” may also be understood as “conversion,” “switching delay” may also be understood as “carrier switching delay,” “carrier conversion delay,” “carrier conversion cycle (period or interval),” or “conversion gap,” and “switching delay” may also be called “switching time within carrier switching preparation time,” or “switching time prior to switching preparation.” Accordingly, when performing uplink scheduling, the network device performs the corresponding scheduling process based on the switching delay. Specifically, this may be understood as N2 being set (where N2 may be understood as uplink processing delay or uplink preparation delay). Further details are not described below.

[0106] The bands supported by different channels of a terminal device are not exactly the same. For example, channel #1 may support bands #A and #C, and channel #2 may support bands #A and #B. For instance, state #1 is when a terminal device transmits a radio frequency chain in slot #1 (for example, state #1 means 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 switches to state #2. For example, DCI #1 instructs the terminal to use band #A, and DCI #2 instructs the terminal to use band #C. A terminal device cannot process two downlink control information pieces simultaneously. Therefore, for example, a terminal device may process the first downlink control information piece first, and then the second. In this case, the terminal device may, by default, refer to state #1 before switching to determine the bands indicated by the corresponding downlink control information. For example, a terminal device may still use band #A on channel #1 and band #C on channel #2, and begin setting 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 reset them. This results in a prolonged processing delay for the terminal device. It should be understood that the above scenario is only one example of this application. Many such scenarios exist when a terminal device switches between states. Examples will not be analyzed one by one here again.

[0107] In view of this, the present invention provides a communication method. The network device indicates the band and / or carrier before the terminal device switches and the band and / or carrier after the terminal device switches, so that the terminal device can clearly obtain a specific band / carrier to interrupt and switch to a target frequency band / carrier. This avoids the problem of reconfiguring the band corresponding to the channel of the terminal device, reduces processing delay of the terminal device, and improves data transmission performance.

[0108] It should be noted that the terms “associate,” “correspond,” and “implicitly correspond” as used in this application are interchangeable. The term “according to…” as used in this application may be understood as “based on….”

[0109] The terms "correspondence," "association," etc., as used in this application may be set for terminal devices by a network device using radio resource control (RRC) signaling, or they may be predefined rules.

[0110] Figure 2 shows a communication method 200 according to the present invention. In method 200, the steps in a specific embodiment of the technical solution of the present invention are represented from the perspective of 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 the sixth piece of information to the network device.

[0112] In possible implementations, the sixth piece of information may include a correspondence between channels and bands of a terminal device, where the bands are those supported by the channel. For example, each channel supports transmission on two bands. In another example, each channel supports transmission on three bands. The number of channels is not limited herein, nor is the number of bands supported by each channel.

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

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

[0115] In other possible implementations, the sixth piece of information includes interband switching correspondence when the terminal device switches between states (first and second states). For example, the first state supports a first number of radio frequency chains transmitted in the bands of the first band group, and the second state supports a second number of radio frequency chains transmitted in the bands of the second band group.

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

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

[0118] In other examples, state #1 (an example of the first state) is assumed to be that the terminal device uses band #B on channel #2 (for example, there are two radio frequency chains transmitted on channel #2), and state #4 (an example of the second state) is assumed to be that 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 necessary), and that the band used on channel #1 is switched to band #A (which may be understood as no radio frequency chain being transmitted on channel #1 before the switching). Examples are shown in Table 2. [Table 2]

[0119] In further possible implementations, the sixth piece of information includes the corresponding switching delay when the terminal device is switched between states (first state and second state).

[0120] In one example, a terminal device might report a switching delay #1 required for switching between state #4 and state #5. This switching delay #1 could be 38 microseconds, 140 microseconds, 210 microseconds, 280 microseconds, 500 microseconds, 1 millisecond, etc. In another example, a terminal device might report a switching delay #2 required for switching between state #1 and state #5. This switching delay #2 could be 38 microseconds, 140 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, this can also be understood as implicitly indicating a switching correspondence between state #1 and state #5, meaning that the corresponding switching can be performed between state #1 and state #5.

[0121] In other possible implementations, the sixth piece of information may include interband switching correspondence when the terminal device is switched from at least one first band to at least one second band.

[0122] In the example, the terminal device may report that it is switched from the first primary band to the first secondary band, and / or from the second primary band to the second secondary band. See Table 1. For example, the terminal device may report that it is switched from band #A to band #C, and from band #B to band #A.

[0123] In further possible implementations, the terminal device may alternatively report the switching delay required for switching from the default or fallback state to a new frequency band. In this case, after completing 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 retreating to the frequency band corresponding to the default / fallback state means that 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 pre-configured by the network device. In this application, pre-configuration may be understood as the network device configuring the state using radio resource control (RRC) signaling.

[0124] In other possible implementations, the terminal device may further report that its original state is retained. Specifically, the terminal device does not switch to a fallback state from the state in which the network device is scheduled to transmit to the terminal device, but remains only in the state instructed by the base station.

[0125] Step 202: The network device receives the sixth piece of information transmitted by the terminal device and determines the first piece of information.

[0126] For example, a network device may determine the band and / or carrier of the terminal device before and after switching, based on the sixth piece of information reported by the terminal device. For example, as shown in Table 1, a terminal device may report to the network device that it has switched from band #A to band #C on channel #1 and 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 decide that the terminal device needs to interrupt its current transmission from band #B and perform a target transmission to band #A, and further, that the terminal device needs to interrupt its current transmission from band #A and perform a target transmission to band #C. Thus, the band before switching is band #B and the band after switching is band #A, and 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 greater than or equal to the time length, the terminal device enters the default state. Optionally, the time length may be predefined, for example, the lifespan of two slots or the lifespan of one slot. If the next state is expected to be band #A 1 Tx and band #C 1 Tx, the terminal device may decide that it needs to reserve 1 Tx from band #A to perform a target 1 Tx transmission and suspend 1 Tx to perform a target 1 Tx transmission to band #C.

[0128] The first information includes at least one information block (for example, N information blocks, where N is an integer greater than 0), and each information block may be associated with the band and / or carrier of the terminal device before switching. It can also be understood that each information block may be implicitly associated with the band and / or carrier of the terminal device before switching. 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 this 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 in use by the terminal device. For example, if the bands currently in use 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 in use 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 used by the terminal device are band #1 and band #3, then the first information block may correspond to band #1 of the terminal and the second information block may correspond to band #3. If the bands currently used by the terminal device are band #28 and band #36, then 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 on band #1 and carrier #1 on band #2, the first information block may, by default, correspond to carrier #3 on band #1, and the second information block may, by default, correspond to carrier #1 on band #2.

[0132] For example, in practice, the index can be set for all carriers on a band. If each band can support 4 carriers, then there can be 12 carriers in bands #1 through #3. # 4 is the career with band #1, careers #5 to #8 are the career with band #2, and careers #9 to #12 are the career with band # 3 It is assumed that this is the carrier. In this case, the first information block may correspond to carrier #1, the second to carrier #2, the third to carrier #3, the tenth to carrier #10, and so on. In this case, the switched band can also be implicitly indicated by using the correspondence between the information blocks and the carriers.

[0133] For example, each information block may alternatively correspond to a carrier set. A carrier set can 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 an index of one carrier set or an index of one carrier group.

[0134] Specifically, a person skilled in the art could design the bands and / or carriers associated with each information block based on actual circumstances. This is not limited to the present invention.

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

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

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

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

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

[0140] In this 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' is longer than or equal to the time of three slots or four slots.

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

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

[0143] Optionally, the first information does not have to include any scheduling information (e.g., MCS offset information and TPC information). In this case, the scheduling DCI for the target band / carrier must be used together. Specifically, transmission of uplink data on the target band / carrier can only be completed after the first information has been used together with the DCI for scheduling transmission of uplink data on the target band / carrier. In this case, the first information may also be understood to indicate only the specific band / carrier whose transmission is interrupted by switching, and the band / carrier after switching, and not be used for scheduling instructions.

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

[0145] For example, the first information may be group common downlink control information (group common DCI) (specifically, in this case, one or more terminals may determine the band / carrier with respect to the switch 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 set by the network device by using RRC signaling. In this case, the first information does not need to point to the second table, because the new RNTI is used for scrambling, and the terminal device can determine by default that the delay included in the first information is the delay in the second table by parsing the RNTI.

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

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

[0148] Step 204: The terminal device receives the first information transmitted by the network device and, based on the first information, transmits uplink data on the switched band / carrier.

[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 consists of two information blocks, the first corresponding to band #18 and the second corresponding to band #20. The first information block contains field #1, where the first indication in field #1 indicates that the switching will be 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 contains field #1, where the first indication in field #1 indicates that the switching will be performed from the current band, and the second indication in field #1 indicates that the band after switching is band #18. In other words, the terminal device may be switched from bands #18 and #20 (e.g., fourth state) to bands #16 and #18 (e.g., fifth state).

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

[0151] In this invention, a terminal device can determine, by using first information, the specific band and / or carrier to be interrupted and the band and / or carrier after switching. This avoids the problem of reconfiguring the band corresponding to the terminal device's channel and reduces latency.

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

[0153] In this invention, the terminal device can determine a specific slot or symbol on which uplink data is transmitted using the switched band / carrier by using first information, thereby allowing the terminal device to receive data in the specific slot based on the indication in field #2 after completing the switching between states. This improves data transmission performance by preventing the terminal device from receiving data before completing the switching between states.

[0154] The present invention further provides other communication methods 300. In method 300, the steps in a specific embodiment of the technical solution of the present invention are presented from the perspective of interaction between a terminal device and a network device. The steps of method 300 are similar to those of method 200. For a specific schematic flowchart, please refer to Figure 2 for understanding. Details are not shown again. The steps of method 300 are described below.

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

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

[0157] In other possible implementations, the sixth piece of information includes cross-band switching correspondence when the terminal device is switched between states (e.g., a first state and a second state).

[0158] In other possible implementations, the sixth piece of information may include interband switching correspondence when the terminal device is switched from at least one first band to at least one second band.

[0159] In further possible implementations, the sixth piece of information includes the corresponding switching delay when the terminal device is switched between states (e.g., a first state and a second state).

[0160] In other possible implementations, the terminal device could alternatively report the switching delay required for switching from the default or fallback state to the new frequency band.

[0161] In other possible implementations, the terminal device may further report that its original state is retained. Specifically, the terminal device is not switched from a state in which the network device schedules the terminal device to perform a transmission to a fallback state, but remains only in the state instructed by the base station.

[0162] For further details, please refer to the explanation of step 201 of Method 200 for understanding. Further details will not be provided again here.

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

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

[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 can implicitly correspond to the band before switching and the band after switching, and the terminal device can obtain the specific band to be interrupted and the band after switching based on each information block. Table 3 may be configured by the network device using RRC signaling, or it may be predefined. [Table 3]

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

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

[0168] For example, the first information block corresponds to band pair #1, and field #3 may further indicate that the switched carrier is carrier #1 in band #B. As another example, the second information block corresponds to band pair #2, and field #3 within 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 field #2 (an example of a second field) indicating the time offset between the first information and the uplink data scheduled using the first information. For a specific understanding of field #2, please refer to the description of step 202 of Method 200. Further details are not provided here.

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

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

[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" can also be understood as "index"), or they may correspond sequentially to the band pair numbers in descending order.

[0173] For example, the second piece of 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 piece of information does not need to point to a second table, because the new RNTI is used for scrambling, and the terminal device can determine that the delay included in the second piece of information is a delay in the second table by parsing the RNTI by default.

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

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

[0176] Step 304: The terminal device receives the second information transmitted by the network device and, based on the second information, transmits uplink data on the switched band.

[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, which contains two information blocks. 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 bit in the first information block, indicating whether to switch this band pair, is 1, the terminal device decides to switch from band #18 to band #16. Similarly, the second information block corresponds to band pair #2, which indicates that the band before switching is #20 and the band after switching is #18. If the third bit in the second information block, indicating whether to switch this band pair, is 1, the terminal device decides to switch from band #20 to band #18. In other words, the terminal device may be switched from bands #18 and #20 (e.g., fourth state) to bands #16 and #18 (e.g., fifth state).

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

[0179] In this invention, the terminal device can determine the specific band to be interrupted and the band or carrier after switching by using second information. This avoids the problem of reconfiguring the band corresponding to the terminal device's channel and reduces latency.

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

[0181] In this invention, the terminal device can determine a specific slot or symbol on which uplink data is transmitted using the switched band / carrier by using the second information, thereby allowing the terminal device to receive data in the specific slot based on the indication in field #2 after completing the switching between states. This improves data transmission performance by preventing the terminal device from receiving data before completing the switching between states.

[0182] The present invention further provides other communication methods 400. In method 400, the steps in a specific embodiment of the technical solution of the present invention are presented from the perspective of interaction between a terminal device and a network device. The steps of method 400 are similar to those of method 200. For a specific schematic flowchart, please refer to Figure 2 for understanding. Details are not shown again. The steps of method 400 are described below.

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

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

[0185] In other possible implementations, the sixth piece of information includes cross-band switching correspondence when the terminal device is switched between states (e.g., a first state and a second state).

[0186] In further possible implementations, the sixth piece of information includes the corresponding switching delay when the terminal device is switched between states (e.g., a first state and a second state).

[0187] In other possible implementations, the sixth piece of information may include interband switching correspondence when the terminal device is switched from at least one first band to at least one second band.

[0188] In other possible implementations, the terminal device could alternatively report the switching delay required for switching from the default or fallback state to the new frequency band.

[0189] In other possible implementations, the terminal device may further report that its original state is retained. Specifically, the terminal device is not switched from a state in which the network device schedules the terminal device to perform a transmission to a fallback state, but remains only in the state instructed by the base station.

[0190] For further details, please refer to the explanation of step 201 of Method 200 for understanding. Further details will not be provided again here.

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

[0192] In this embodiment, the third information includes field #1 (an example of a first field), where field #1 (e.g., “switch from band / CC index”) indicates the 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 after switching of the terminal device is carrier #17 (in this case, the band after switching may be implicitly determined based on the carrier; see the description of step 202 of Method 200 for a concrete understanding). As yet another example, field #1 may explicitly indicate the band after switching, which 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, by default, carrier #4 in band #10.

[0193] In possible implementations, the third piece of information may further include field #8 ("switch to band / CC") indicating the band and / or carrier after switching (for example, field #8 may indicate the band and / or carrier after switching ("switch to band / CC")). For specific implementations, see the implementation described above where field #1 indicates the band of the terminal device before switching. Further details are not provided here.

[0194] In other possible implementations, the band and / or carrier before switching may be determined by the terminal device according to pre-set rules. For example, the pre-set rules may be that transmission is interrupted based on the corresponding lowest index from the band and / or carrier where the terminal device is located, or that transmission is interrupted based on the corresponding highest index from the band and / or carrier where the terminal device is located. Another example is that the pre-set rules may be that transmission is interrupted by sequentially selecting the lowest index obtained by sorting the corresponding index in ascending order from the band and / or carrier where the terminal device is located, or that transmission is interrupted by sequentially selecting the highest index obtained by sorting the corresponding index in descending order from the band and / or carrier where the terminal device is located.

[0195] The “switch from band” above can use 0 / 1 to indicate the lower / higher band among the currently active bands, or it can indicate the band index. For example, one bit or padding bit of UL / SUL may be reused. Similarly, the “switch to band index / CC index” above can use 0 / 1 to indicate the lower / higher band among the remaining bands excluding the currently active band from among the multiple set bands, or it can indicate the band index / CC index, or one bit or padding bit of UL / SUL may be reused.

[0196] Optionally, the correspondence between switch from band / CC and switch to band index / CC may be configured using RRC signaling or predefined. See Table 3 for details. In this case, the third piece of information may indicate the index value of the switching correspondence within the configuration.

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

[0198] Optionally, the third information may further include field #2 (example of the second field) indicating the time offset between the first information and the uplink data scheduled using the first information. For a specific understanding of field #2, see the description in step 202 of Method 200. Further details are not provided here again. Furthermore, if the third information includes field #2, the third information may further include field #4 indicating the location of the time offset. For example, field #4 may indicate a second table in which the time offset is located (in other words, the second table may be redesigned for K2'), or field #4 may indicate the index or location of the time offset in the first table (in this case, bit extensions may be made in the existing K2 table (referred to as the "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 the transmit rate of the terminal device in the switched band / carrier. For example, a 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 switched target band / carrier.

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

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

[0202] In this embodiment, the third information 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 can also be understood that the information blocks in this embodiment are not implicitly associated with the band and / or carrier before switching. Thus, both the band and / or carrier before switching and the band and / or carrier after switching must 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 may not include any scheduling information. In this case, the third information may be compact downlink control information (compact DCI) (DCI 0_0), which can be scrambled by using a new RNTI.

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

[0204] For example, a network device may send dynamically scheduled DCIs to terminal devices, or a network device may send compact DCIs to terminal devices.

[0205] Step 404: The terminal device receives third information transmitted by the network device and, based on the third information, transmits uplink data on the switched band.

[0206] In the example, the third piece of information is used to indicate a band (it can be understood similarly if the third piece of information indicates a carrier). For example, a network device may deliver two pieces of third information simultaneously. Suppose a 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 switches from the band on channel #1 to band #16 and from the band on channel #2 to band #18 based on the instructions of the third information. In other words, the terminal device may switch from band #18 and band #20 (e.g., fourth state) to band #16 and band #18 (e.g., fifth state).

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

[0208] In this invention, the terminal device can determine the specific band to be interrupted and the band or carrier after switching by using third-party information. This avoids the problem of reconfiguring the band corresponding to the terminal device's channel and reduces latency.

[0209] Optionally, if the third information further includes field #2, for example, if the terminal device is currently receiving the third information in slot #1, 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 begin transmitting data from the third symbol in slot #2 using bands #16 and #18.

[0210] In this invention, the terminal device can determine a specific slot or symbol on which uplink data is transmitted using a switched band / carrier by using third information, thereby allowing the terminal device to receive data in a specific slot based on the indication in field #2 after completing the switching between states. This improves data transmission performance by preventing the terminal device from receiving data before completing the switching between states.

[0211] The present invention further provides other communication methods 500. In method 500, the steps in a specific embodiment of the technical solution of the present invention are presented from the perspective of interaction between a terminal device and a network device. The steps of method 500 are similar to those of method 200. For a specific schematic flowchart, please refer to Figure 2 for understanding. Details are not shown again. The steps of method 500 are described below.

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

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

[0214] In other possible implementations, the sixth piece of information includes cross-band switching correspondence when the terminal device is switched between states (e.g., a first state and a second state).

[0215] In further possible implementations, the sixth piece of information includes the corresponding switching delay when the terminal device is switched between states (e.g., a first state and a second state).

[0216] In other possible implementations, the sixth piece of information may include interband switching correspondence when the terminal device is switched from at least one first band to at least one second band.

[0217] In other possible implementations, the terminal device could alternatively report the switching delay required for switching from the default or fallback state to the new frequency band.

[0218] In other possible implementations, the terminal device may further report that its original state is retained. Specifically, the terminal device is not switched from a state in which the network device schedules the terminal device to perform a transmission to a fallback state, but remains only in the state instructed by the base station.

[0219] For further details, please refer to the explanation of step 201 of Method 200 for understanding. Further details will not be provided again here.

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

[0221] In this embodiment, the fourth information includes field #5 (an example of a fifth field), where field #5 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 the sixth field), which instructs the terminal device to receive the fifth information, which indicates the second band after the terminal device has switched.

[0223] In the example, the fourth piece of information may be a dynamically scheduled DCI, and a new bit may be added to an 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 being determined for transmission after the other DCIs have been parsed, so that the terminal device can set the corresponding channel parameter based on the complete transmit combination state of the target slot, thereby mitigating reconfiguration problems caused by channel setting errors. If the new bit is 0, it indicates that other DCIs for the same terminal device in the slot do not require cooperative scheduling. Thus, the corresponding channel parameter 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 instructions of the fourth and fifth pieces of information.

[0225] Based on the technical solution described above, the fourth piece of information can indicate the presence of other DCIs detected in the current slot, thereby requiring the terminal device to wait for information on the second DCI after obtaining the first DCI, and then determine the transmission combination state of the target slot scheduled for transmission based on the two DCIs. Thus, the parameter resetting problem is avoided, as the parameter does not need to be set for unsupported channels.

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

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

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

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

[0230] Based on the technical solution described above, the network device uses fourth information to indicate the start time for setting channel parameters after the DCI detected in the current slot has been parsed. This means that after obtaining the first DCI, the terminal device does not need to immediately set the channel parameters. It can then obtain the second DCI before the start time and, based on the two DCIs, comprehensively determine the transmission combination state of the target slot scheduled for transmission. Consequently, the parameter reconfiguration problem is avoided, as parameters do not need to be set for unsupported channels.

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

[0232] For example, a network device may send dynamically scheduled fourth and fifth pieces of information to a terminal device.

[0233] Step 504: The terminal device receives the fourth and fifth pieces of information transmitted by the network device, and based on the fourth and fifth pieces of information, transmits uplink data on the switched band / carrier.

[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 the fourth piece of information in slot #2. Based on the fourth piece of information, the terminal device determines that the switched band is band #18 and that the fifth piece of information needs to be received in slot #2. Based on both the fourth and fifth pieces of information, the terminal device needs to determine the switched band. The terminal device then receives the fifth piece of information in slot #2, which indicates that the switched band for the terminal device is band #16. It is assumed that the terminal device supports bands #18 and #16 on channel #1 and bands #20 and #18 on channel #2. In this case, based on both the fourth and fifth pieces of information, the terminal device may determine that band #18 needs to be switched to band #16 on channel #1 (e.g., state 4) and band #20 needs to be switched to band #18 on channel #2 (e.g., state 5).

[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 at the first symbol in slot #2, and based on the fourth information, it determines that the band after switching is band #18 and that the parameter needs to be set on channel #1 from the tenth symbol in slot #2. The terminal device receives fifth information between the second and ninth symbols in slot #2, and based on the fifth information, it determines that the band after switching is band #16. In this case, based on both the fourth and fifth information, 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).

[0236] It should be understood that the solution in this embodiment is also applicable to switching between carriers within a band. This is not described here by using an example.

[0237] In this invention, 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 and fifth pieces of information. This avoids the problem of reconfiguring the band corresponding to the terminal device's channel and improves data transmission.

[0238] Optionally, the fourth or fifth piece of information may further include field #2. For example, if a terminal device is currently receiving the fourth piece of information in slot #2, and the fourth piece of information includes field #2, then field #2 can instruct the terminal device to transmit data at the third symbol in the third slot; in other words, the terminal device can begin transmitting data from the third symbol in slot #3 using bands #16 and #18. As another example, if a terminal device is currently receiving the fifth piece of information in slot #2, and the fifth piece of information includes field #2, then field #2 can instruct the terminal device to transmit data at the third symbol in the third slot; in other words, the terminal device can begin transmitting data from the third symbol in slot #3 using bands #16 and #18.

[0239] In this invention, the terminal device can determine a specific slot or symbol on which uplink data is transmitted by using the band / carrier after switching, by using the fourth and fifth information, so that after the switching between states is complete, the terminal device receives data in the specific slot based on the indication in field #2. This improves data transmission performance because it avoids the terminal device receiving data before the switching between states is complete.

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

[0241] It can be further understood that some optional features in embodiments of the present application may be independent of other features in some scenarios, or may be combined with other features in some scenarios. This is not limited to this.

[0242] It can be further understood that the embodiments described herein may be independent solutions or may be combined based on their own logic. All of these solutions fall within the scope of protection of this application. In addition, the definitions and descriptions of terms in the embodiments may be referenced or described to one another within the embodiments, but are not limited thereto.

[0243] It should be understood that the term "pre-define" in this application may be understood as "define," "pre-define," "memorize," "memorize in advance," "negotiate in advance," "pre-set," "solidify," or "write in advance."

[0244] In this application, "when," "in the case of," and "in the event of" all mean that the device performs the appropriate processing in objective circumstances, and are not intended to limit time, nor do they imply that the device does not necessarily have to perform a decisive action during implementation, nor do they imply any other limitations.

[0245] In this specification, the terms "and / or" indicate only an association relationship for describing related objects, and that three such relationships may exist. For example, A and / or B may represent the following three cases: A exists only, both A and B exist, and B exists only. In addition, the letter " / " in this specification usually indicates an "or" relationship between related objects.

[0246] The above describes the solution provided in the embodiments of the present application from the perspective of interaction between nodes. It can be understood that, in order to implement the above functions, each node, such as a terminal device or network device, includes a corresponding hardware structure and / or software module for performing each function. Those skilled in the art will recognize, in combination with the example units and algorithmic steps described with reference to the embodiments disclosed herein, that the present application can be implemented in hardware or in combination of hardware and computer software. 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 implementation should not be considered to extend beyond the scope of the present application.

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

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

[0249] In possible designs, the apparatus 100 may be a terminal device in an embodiment of the method, or a chip configured to perform the functions of a terminal device in an embodiment of the method. It should be understood that the apparatus 100 may correspond to a terminal device of methods 200 to 500 in embodiments of the present application, and the apparatus 200 may perform steps corresponding to a terminal device of methods 200 to 500 in 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 possible implementations, the transceiver unit is configured 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 and fifth information.

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

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

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

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

[0260] In a possible implementation, the processing unit is configured to determine the fourth and fifth pieces of information, and the transceiver unit is configured to transmit the fourth and fifth pieces of 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 include an application-specific integrated circuit (ASIC), electronic circuitry, a processor configured to run one or more software or firmware (e.g., a shared processor, a dedicated processor, or a group processor), memory, integrated logic circuitry, and / or other suitable components that support the functions described. In any example, a person skilled in the art will understand that the apparatus 100 may specifically be a terminal device or network device of the above embodiment and may be configured to perform procedures and / or steps corresponding to a terminal device in the embodiment of the above method. For the sake of avoiding repetition, further details are not described herein again.

[0262] The apparatus 100 of the above solution has a function to perform the corresponding steps performed by a terminal device or network device in the above manner. The function may be performed by hardware or by hardware running the corresponding software. The hardware or software includes one or more modules corresponding to the above function. For example, a transceiver unit may be replaced by a transceiver (for example, 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 receiving device), and other units, such as a processing unit, may be replaced by a processor to individually perform the transmit / receive operation and associated processing operation in the embodiment of the method.

[0263] In addition, the transceiver unit 110 may alternatively be a transceiver circuit (for example, which may include 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 Figure 6 may be a terminal device or network device of the above embodiment, or it may be a chip or chip system, such as a system on a chip (SoC). The transceiver unit may be an input / output circuit or a communication interface. The processing unit is a processor, microprocessor, or integrated circuit on a chip, but is not limited thereto.

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

[0266] It should be understood that the processor 220 and memory 230 may be integrated into a single processing device. The processor 220 is configured to perform the above functions by executing program code stored in memory 230. In specific implementations, memory 230 may, alternatively, be incorporated into the processor 220 or be independent of the processor 220.

[0267] Furthermore, it should be understood that the transceiver 210 may include a transceiver (or a receiver device) and a transmitter (or 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 device 200 may correspond to the transceiver unit 110 of device 100, and the processor 220 of device 200 may correspond to the processing unit 120 of device 100.

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

[0270] For example, the processor 220 is configured to execute a computer program or instruction stored in the memory 230 to perform the relevant operation performed by the terminal device in the embodiment of the above method. For example, the processor is configured to perform the method performed by the terminal device in any one of the embodiments shown in Methods 200 to 500.

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

[0272] For example, the processor 220 is configured to execute a computer program or instruction stored in the memory 230 to perform the relevant operation performed by the network device in the embodiment of the above method. For example, the processor is configured to perform 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 processes by which each transceiver and each processor performs the corresponding steps described above are described in detail in embodiments of the method. For the sake of brevity, the details are not described again here.

[0274] In the implementation process, the steps of the above method may be carried out by using hardware-integrated logic circuits within a processor or by using instructions in the form of software. The steps of the method disclosed with reference to embodiments of this application may be performed and completed directly by using a hardware processor, or by using a combination of hardware and software modules within a processor. The software modules may reside in mature storage media of the art, such as random-access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. The storage medium resides in memory, and the processor reads information from memory and, in combination with the processor's hardware, completes the steps of the above method. For the sake of avoiding repetition, further details are not described again here.

[0275] It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip and possesses signal processing capabilities. In the implementation process, the steps of the embodiments of the above method may be carried out 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 embodiments of the present application may be carried out and completed directly by using a hardware decoding processor, or by using a combination of hardware and software modules in the decoding processor. The software module may reside in a mature storage medium in the art, such as random-access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. The storage medium resides in memory, and the processor reads the information in memory and, in combination with the processor hardware, completes the steps of the method described above.

[0276] It can be understood that the memory in the embodiments of this application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. 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. Volatile memory may be random access memory (RAM) used as an external cache. For example, a number of RAM forms may be used, not as an extension, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchlink dynamic random access memory (synchlink DRAM, SLDRAM), and direct rambus random access memory (direct rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein includes, but is not limited to, these memories, any other suitable types of memory.

[0277] The present application further provides a computer program product according to the method provided in the embodiments of the present application. The computer program product stores computer program code. When the computer program code is executed by a computer, the computer can perform a method that is performed by a terminal device or a network device in any one of the embodiments of Method 200 to Method 500.

[0278] The present application further provides a computer-readable medium according to the method provided in the embodiments of the present application. The computer-readable medium stores program code. When the program code is executed by a computer, the computer can perform the method performed by a terminal device or network device in the embodiments described above.

[0279] The present application further provides a communication system according to the method provided in the embodiments of the present application. The communication system includes terminal devices and network devices. The terminal devices are configured to perform the steps corresponding to the terminal devices in the above methods 200 to 500, and the network devices are configured to perform the steps corresponding to the network devices in the above methods 200 to 500.

[0280] For a description of the relevant aspects and advantageous effects of any one of the devices provided above, please refer to the corresponding embodiment of the method provided above. Further details are not provided here again.

[0281] All or part of the embodiments described above may be implemented by software, hardware, firmware, or any combination thereof. If software is used to implement the embodiments, all or part of the embodiments may be implemented in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer instructions are loaded into a computer and executed, all or part of the procedures or functions according to the embodiments of the present application are generated. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer server, or data center by wired (e.g., coaxial cable, optical fiber, or digital subscriber line (DSL)) or wireless (e.g., infrared, radio waves, or microwaves). The computer-readable storage medium may be any available medium accessible to the computer, or a data storage device incorporating one or more available mediums, such as a server or data center. The usable media may include magnetic media (e.g., floppy disks, hard disk drives, or magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), semiconductor media (e.g., solid-state drives (SSDs)), and so on.

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

[0283] As used herein, terms such as “component,” “module,” and “system” are used to indicate computer-related entities, hardware, firmware, combinations of hardware and software, software, or software on which software is running. For example, a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. As illustrated, both applications running on computing devices and computing devices may be components. One or more components may reside in a process and / or an execution thread, and components may be located on one computer and / or distributed among two or more components. In addition, these components may run from various computer-readable media storing various data structures. For example, components may communicate by using local processes and / or remote processes, and on the basis of signals having one or more data packets (e.g., data from two components interacting with other components in a local or distribution system, and / or data across a network such as the Internet interacting with other systems by using signals).

[0284] A person skilled in the art can notice that the units and algorithm steps in the examples described by referring to the embodiments disclosed in this specification may be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether a function is executed by hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but it should not be considered that the implementation exceeds the scope of this application.

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

[0286] It should be understood that in some embodiments provided in this application, the disclosed systems, devices, and methods may be implemented in other manners. For example, the described embodiments of the device are only examples. For example, the division into units is only a logical function division, and there may be other divisions during actual implementation. For example, a plurality of units or components may be combined or integrated with other systems, or some features may be ignored or not executed. In addition, the mutual coupling, direct coupling, or communication connection shown or discussed may be implemented through some interface. The indirect coupling or communication connection between devices or units may be implemented in an electronic, mechanical, or other form.

[0287] The units pointed out as separate components may or may not be physically separated, and the components shown as units may or may not be physical units. They may be located in one place or distributed on multiple network units. Some or all of the units may be selected based on actual requirements to achieve the objectives 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 unit may exist physically independently, or two or more units may be integrated into one unit.

[0289] When the function is implemented in the form of a software functional unit and sold or used as an independent product, the function may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application is essentially, or the part that contributes to the prior art, or a 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 several 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 codes, 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] As described throughout this specification, "embodiment" should be understood to mean that a particular feature, structure, or characteristic related to this embodiment is included in at least one embodiment of the present application. Therefore, the embodiments throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. [[ID=1,3]]

[0291] Furthermore, it should be understood that while ordinal numbers such as "first" and "second" in the embodiments of this application are used to distinguish between multiple objects, they are not intended to limit the size, content, order, chronological order, priority, importance, etc., of the multiple objects. For example, the first PDSCH and the second PDSCH may be the same physical channel or different physical channels. In addition, the names do not indicate different amounts of information, content, priority, or importance of the two physical channels.

[0292] Furthermore, it should be understood that in this application, "at least one" means one or more, and "multiple..." means two or more. "At least one item" or similar expression means one item or multiple items, that is, any combination of these items including any combination of a single item or multiple items. For example, at least one of a, b, or c could be a, b, c, a and b, a and c, b and c, and a, b and c.

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

[0294] The above description merely illustrates a specific implementation of the present application and is not intended to limit the scope of protection. Any modification or substitution that a person skilled in the art could easily conceive within the technical scope disclosed herein should fall within the scope of protection. Accordingly, the scope of protection of this application should be subject to the scope of protection of the claims.

Claims

1. A communication method applicable to a terminal device or a chip for said terminal device, The receiving of first information from a network device, the first information comprising N information blocks, the j-th information block of the N information blocks comprising a first field, the first field indicating the switched band and / or carrier of the terminal device, the j-th information block being associated with the pre-switching band and / or carrier of the terminal device, where N is a positive integer, and the receiving of, Based on the first information, uplink data is transmitted on the switched band and / or carrier. A communication method that includes [something].

2. The j-th information block among the N information blocks corresponds to the band before switching and the band after switching. The communication method according to claim 1.

3. The association between each of the N information blocks and the band before switching is established by the network device using RRC signaling. The communication method according to claim 1.

4. The aforementioned communication method is, The system further includes transmitting sixth information to the network device, the sixth information being used by the network device to determine the first information, and at this time, The sixth piece of information includes a correspondence between at least one channel of the terminal device and the bands supported by the at least one channel. The sixth information includes, at a minimum, a switching correspondence between bands in the case of switching of the terminal device between a first state and a second state, wherein the first state supports a first number of radio frequency chains transmitted within the band of a first band group, and the second state supports a second number of radio frequency chains transmitted within the band of a second band group. The sixth information includes at least the switching delay of the terminal device switching between the first state and the second state, wherein the first state is that the terminal device supports a first number of radio frequency chains transmitted in the bands of the first band group, and the second state is that the terminal device supports a second number of radio frequency chains transmitted in the bands of the second band group, and / or The sixth piece of information includes, at least, a switching correspondence between bands in the case of switching the terminal device from at least one first band to at least one second band. The communication method according to claim 1.

5. A communication method applicable to a terminal device or a chip for said terminal device, The receiving of second information from a network device, wherein the second information comprises M information blocks, the k-th information block among the M information blocks is associated with a band pair of the terminal device, the band pair comprises the band of the terminal device before switching and the band of the terminal device after switching, and M is a positive integer. Based on the second information, uplink data is transmitted on the switched band. A communication method that includes [something].

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

7. The association between the location of each of the M information blocks and the band pair of the terminal device is established by the network device using RRC signaling. The communication method according to claim 5.

8. The aforementioned communication method is, The system further includes transmitting sixth information to the network device, the sixth information being used by the network device to determine the second information, and at this time, The sixth piece of information includes a correspondence between at least one channel of the terminal device and the bands supported by the at least one channel. The sixth information includes, at a minimum, a switching correspondence between bands in the case of switching of the terminal device between a first state and a second state, wherein the first state supports a first number of radio frequency chains transmitted within the band of a first band group, and the second state supports a second number of radio frequency chains transmitted within the band of a second band group. The sixth information includes at least the switching delay of the terminal device switching between the first state and the second state, wherein the first state is that the terminal device supports a first number of radio frequency chains transmitted in the bands of the first band group, and the second state is that the terminal device supports a second number of radio frequency chains transmitted in the bands of the second band group, and / or The sixth piece of information includes, at least, a switching correspondence between bands in the case of switching the terminal device from at least one first band to at least one second band. The communication method according to claim 5.

9. A communication method applicable to a network device or a chip for a network device, The first information is to determine the first information which includes N information blocks, the j-th information block among the N information blocks includes a first field which indicates the band and / or carrier of the terminal device after switching, and the j-th information block is associated with the band and / or carrier of the terminal device before switching, where N is a positive integer. Transmitting the aforementioned first information to the terminal device A communication method that includes [something].

10. The j-th information block among the N information blocks corresponds to the band before switching and the band after switching. The communication method described in claim 9.

11. The association between each of the N information blocks and the band before switching is established by the network device using RRC signaling. The communication method described in claim 9.

12. The aforementioned communication method is, The system further includes receiving sixth information from the terminal device, the sixth information being used by the network device to determine the first information, and at this time, The sixth piece of information includes a correspondence between at least one channel of the terminal device and the bands supported by the at least one channel. The sixth information includes, at a minimum, a switching correspondence between bands in the case of switching of the terminal device between a first state and a second state, wherein the first state supports a first number of radio frequency chains transmitted within the band of a first band group, and the second state supports a second number of radio frequency chains transmitted within the band of a second band group. The sixth information includes at least the switching delay of the terminal device switching between the first state and the second state, wherein the first state is that the terminal device supports a first number of radio frequency chains transmitted in the bands of the first band group, and the second state is that the terminal device supports a second number of radio frequency chains transmitted in the bands of the second band group, and / or The sixth piece of information includes, at least, a switching correspondence between bands in the case of switching the terminal device from at least one first band to at least one second band. The communication method described in claim 9.

13. A communication method applicable to a network device or a chip for a network device, The second information is to determine the second information which includes M information blocks, the k-th information block among the M information blocks is associated with a band pair of a terminal device, the band pair includes the band of the terminal device before switching and the band of the terminal device after switching, and M is a positive integer. The second information is transmitted to the terminal device. A communication method that includes [something].

14. The k-th information block further includes a third field, the third field indicating the switched carrier of the terminal device. The communication method according to claim 13.

15. The association between the location of each of the M information blocks and the band pair of the terminal device is established by the network device using RRC signaling. The communication method according to claim 13.

16. The aforementioned communication method is, The system further includes receiving sixth information from the terminal device, the sixth information being used by the network device to determine the second information, and at this time, The sixth piece of information includes a correspondence between at least one channel of the terminal device and the bands supported by the at least one channel. The sixth information includes, at a minimum, a switching correspondence between bands in the case of switching of the terminal device between a first state and a second state, wherein the first state supports a first number of radio frequency chains transmitted within the band of a first band group, and the second state supports a second number of radio frequency chains transmitted within the band of a second band group. The sixth information includes at least the switching delay of the terminal device switching between the first state and the second state, wherein the first state is that the terminal device supports a first number of radio frequency chains transmitted in the bands of the first band group, and the second state is that the terminal device supports a second number of radio frequency chains transmitted in the bands of the second band group, and / or The sixth piece of information includes, at least, a switching correspondence between bands in the case of switching the terminal device from at least one first band to at least one second band. The communication method according to claim 13.

17. It has a processor and memory, The memory is configured to store computer programs or instructions. The processor is configured to execute the computer program or instructions in the memory to perform the communication method described in any one of claims 1 to 4 or 5 to 8. Communication device.

18. It stores computer programs, When the computer program is executed on the computer, the computer can perform the communication method described in any one of claims 1 to 4 or 5 to 8. Computer-readable storage medium.

19. A computer program that includes instructions to cause a computer to execute the communication method described in any one of claims 1 to 4 or 5 to 8.

20. It has a processor and memory, The memory is configured to store computer programs or instructions. The processor is configured to execute the computer program or instructions in the memory to perform the communication method described in any one of claims 9 to 12 or 13 to 16. Communication device.

21. It stores computer programs, When the computer program is executed on the computer, the computer can perform the communication method described in any one of claims 9 to 12 or 13 to 16. Computer-readable storage medium.

22. A computer program that includes an instruction causing a computer to execute the communication method described in any one of claims 9 to 12 or 13 to 16.

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