Communication method and device

Abstract

A communication method and device, the communication method comprising: receiving first control information on a first frequency domain unit, the first control information indicating that a frequency domain unit of a first communication device receiving a control signal is switched from the first frequency domain unit to a second frequency domain unit, and / or the first control information indicating that the frequency domain unit is switched from the first frequency domain unit to the second frequency domain unit; the first control information indicates that a frequency domain unit of the first communication device receiving the data signal is switched from a first frequency domain unit to a second frequency domain unit. According to the scheme, switching of the frequency domain units receiving the control signals and / or the data signals is indicated through the control information, the scheduling flexibility of the frequency domain units in the communication system can be improved, and the scheduling of the frequency domain units in the communication system is more reasonable.

Description

Technical Field

[0001] This application relates to the field of communications, and more specifically, to a communication method and apparatus. Background Technology

[0002] In the current cell concept defined in communication systems, each cell can simultaneously contain uplink component carriers (CCs) and downlink CCs, and typically there is one uplink CC and one downlink CC, with each CC corresponding to an independent cell. As terminal service demands increase, carrier aggregation (CA) can be used to aggregate two or more CCs together to support greater transmission bandwidth and provide the frequency domain resources required for transmission services.

[0003] Base stations can schedule frequency domain units based on the conditions of different frequency domain units. For example, taking a frequency domain unit as a CC, in a carrier aggregation scheme, the base station can select at least two CCs for scheduling from multiple CCs based on the congestion and load conditions on different CCs, as well as the frequency points or bandwidths of different CCs. When selecting at least two CCs for scheduling from multiple CCs, a handover to the primary cell (PCell) or secondary cell (SCell) may be required. Terminal devices cannot communicate during PCell handover, and the scheduling of CCs during PCell or SCell handover is not flexible. Summary of the Invention

[0004] This application provides a communication method and apparatus, which can improve the flexibility of frequency domain unit scheduling in a communication system.

[0005] Firstly, a communication method is provided. This method can be executed by a first communication device (e.g., a terminal device), or by a component of the first communication device (e.g., a processor, chip, or chip system, such as a circuit or chip responsible for communication functions in the first communication device (e.g., a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip)). Alternatively, it can be executed by a logic module or software capable of implementing all or part of the functions of the first communication device. For ease of description, the following explanation uses the execution by the first communication device as an example.

[0006] The method includes: receiving first control information in a first frequency domain unit, wherein the first control information instructs the frequency domain unit in which the first communication device receives control signals to switch from the first frequency domain unit to a second frequency domain unit, and / or, wherein the first control information instructs the frequency domain unit in which the first communication device receives data signals to switch from the first frequency domain unit to the second frequency domain unit.

[0007] For example, the first control information may instruct the frequency domain unit receiving the control signal and the frequency domain unit receiving the data signal to be switched from the first frequency domain unit to the same frequency domain unit or a different frequency domain unit.

[0008] Based on the solution provided in the embodiments of this application, the frequency domain unit receiving control signals and / or data signals is switched by the first control information. Compared with the frequency domain unit receiving control signals and data signals being switched to the same frequency domain unit during cell handover, the scheduling flexibility of frequency domain units in the communication system can be improved, making the scheduling of frequency domain units in the communication system more reasonable.

[0009] Furthermore, when the first control information instructs the first communication device to switch the frequency domain unit for receiving data signals from the first frequency domain unit to the second frequency domain unit, the handover still retains the function of the primary cell in the first frequency domain unit, thus the primary cell handover delay is 0. Compared to primary cell handover, this reduces cell handover time, shortens cell handover delay, and improves downlink throughput and system efficiency.

[0010] In some possible implementations, before receiving the first control information on the first frequency domain unit, the method may further include: determining the first frequency domain unit.

[0011] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit, and the method may further include: receiving the control signal in the second frequency domain unit.

[0012] For example, after the first communication device switches the frequency domain unit for receiving control signals from the first frequency domain unit to the second frequency domain unit according to the instruction of the first control information, it no longer receives control signals in the first frequency domain unit, but receives control signals in the second frequency domain unit.

[0013] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit for receiving data signals. The method may also include receiving data signals in the second frequency domain unit.

[0014] For example, after the first communication device switches the frequency domain unit for receiving data signals from the first frequency domain unit to the second frequency domain unit according to the instruction of the first control information, it no longer receives data signals in the first frequency domain unit, but receives data signals in the second frequency domain unit.

[0015] In some possible implementations, the method further includes: receiving second control information in one of the n third frequency domain units, where n is an integer greater than 0; the second control information instructs the first communication device to switch the frequency domain unit receiving the control signal from one third frequency domain unit to a fourth frequency domain unit; and / or, the second control information instructs the first communication device to switch the frequency domain unit receiving the data signal from one third frequency domain unit to a fourth frequency domain unit.

[0016] Based on the solution provided in the embodiments of this application, by instructing the switching of frequency domain units receiving control signals and / or data signals through the first control information and the second control information, the terminal device can switch multiple frequency domain units simultaneously, making the scheduling of frequency domain units in the communication system more reasonable.

[0017] In some other possible implementations, the method further includes: receiving additional control information on one of n third frequency domain units, where n is an integer greater than 0; the additional control information does not instruct the first communication device to switch the frequency domain unit for receiving control signals from one third frequency domain unit to a fourth frequency domain unit; and / or, the additional control information does not instruct the first communication device to switch the frequency domain unit for receiving data signals from one third frequency domain unit to a fourth frequency domain unit. The first communication device can receive control signals and data signals scheduled by the additional control information on that one third frequency domain unit.

[0018] For example, the first communication device may, according to the instructions of the first control information and the second control information, switch only the frequency domain unit for receiving data signals from the first frequency domain unit to the second frequency domain unit, without switching the third frequency domain unit.

[0019] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device receiving control signals to switch from a first frequency domain unit to a second frequency domain unit, and the second control information instructs the frequency domain unit of the first communication device receiving control signals to switch from a third frequency domain unit to a fourth frequency domain unit.

[0020] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device to receive data signals to switch from a first frequency domain unit to a second frequency domain unit, and the second control information instructs the frequency domain unit of the first communication device to receive data signals to switch from a third frequency domain unit to a fourth frequency domain unit.

[0021] In different CC switching scenarios, more than two switching methods are supported. Since the first communication device needs to distinguish between the two switching methods, the control signaling under both switching methods needs to be increased, which will increase the overhead of control signaling. Supporting only one switching method can save overhead while achieving the effect of fast switching.

[0022] In some possible implementations, the method may further include: sending capability information indicating that the first communication device supports a maximum number of carriers that can simultaneously receive signals, where m is an integer greater than 1.

[0023] Specifically, m is an integer greater than n+1, n is the number of third frequency domain units, n is an integer greater than 0, and one of the n third frequency domain units is used to receive other control information.

[0024] For example, capability information can be used by the second communication device to determine whether the first communication device can switch multiple frequency domain units simultaneously. If the first communication device can switch multiple frequency domain units simultaneously, the second communication device can instruct the first communication device to switch one or more frequency domain units simultaneously by sending first control information on multiple frequency domain units at the same time.

[0025] For example, the capability information indicates that the maximum number of carriers that the first communication device supports receiving signals simultaneously is 2. The second communication device can simultaneously send the first control information on 2 frequency domain units, instructing the first communication device to switch between the 2 frequency domain units at the same time; or, the second communication device can send the first control information on one of the 2 frequency domain units and send downlink control information on the other. The first control information instructs the first communication device to switch between 1 frequency domain unit, while the downlink control information does not instruct the first communication device to switch between frequency domain units.

[0026] For example, capability information can be used by the second communication device to determine whether the first communication device can simultaneously receive multiple frequency domain units. If the first communication device can simultaneously receive multiple frequency domain units, the second communication device can configure frequency domain units that meet / do not exceed its capabilities for the first communication device.

[0027] For example, if the capability information indicates that the first communication device supports a maximum of 2 carriers that can receive signals simultaneously, the second communication device can be configured with 2 frequency domain units for the first communication device; or, the second communication device can be configured with 1 frequency domain unit for the first communication device.

[0028] Based on the solution provided in the embodiments of this application, by sending capability information from the first communication device to the second communication device, the second communication device can configure frequency domain units that meet / do not exceed the capabilities of the first communication device and / or switch frequency domain units, making the configuration and scheduling of frequency domain units in the communication system more reasonable.

[0029] In some possible implementations, the method may further include: receiving frequency domain unit configuration information, the frequency domain unit configuration information indicating multiple frequency domain units, and the frequency domain unit receiving the first control information and / or the frequency domain unit receiving the second control information belonging to multiple frequency domain units.

[0030] For example, the frequency domain unit configuration information is determined based on the capability information, and the multiple frequency domain units indicated by the frequency domain unit configuration information satisfy the capability information.

[0031] For example, the frequency domain unit for receiving the first control information and / or the frequency domain unit for receiving the second control information of the first communication device is determined by the first communication device from among a plurality of frequency domain units indicated by the frequency domain unit configuration information based on the capability information.

[0032] Based on the solution provided in the embodiments of this application, determining the frequency domain unit that meets the capabilities of the first communication device through the first communication device or the second communication device can make the configuration and scheduling of frequency domain units in the communication system more reasonable.

[0033] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device receiving control signals to switch from the first frequency domain unit to the second frequency domain unit, and the first control information also instructs the frequency domain unit receiving data signals to switch from the first frequency domain unit to the fifth frequency domain unit.

[0034] When the second and fifth frequency domain units are different, the frequency domain units for receiving control signals and receiving data signals are decoupled.

[0035] Based on the solution provided in the embodiments of this application, the frequency domain units of receiving control signals and receiving data signals can be decoupled by the indication of the first control information, which makes the configuration and scheduling of frequency domain units in the communication system more reasonable.

[0036] In some possible implementations, the first control information includes a first indication field, which is used to indicate that the frequency domain unit receiving the control signal switches from the first frequency domain unit to the second frequency domain unit, and / or, the first indication field is used to indicate that the frequency domain unit receiving the data signal of the first communication device switches from the first frequency domain unit to the second frequency domain unit.

[0037] For example, the first indication field includes a first field, which includes Z bits, where Z is an integer greater than 0. The Z bits are used to indicate that the frequency domain unit of the first communication device receiving control signals switches from the first frequency domain unit to the second frequency domain unit, and / or, the Z bits are used to indicate that the frequency domain unit of the first communication device receiving data signals switches from the first frequency domain unit to the second frequency domain unit.

[0038] In some other possible implementations, the first control information includes a first indication field and a second indication field, wherein the first indication field is used to instruct the frequency domain unit of the first communication device receiving control signals to switch from the first frequency domain unit to the second frequency domain unit, and / or the second indication field is used to instruct the frequency domain unit of the first communication device receiving data signals to switch from the first frequency domain unit to the second frequency domain unit.

[0039] For example, the first indication field includes a first field, the second indication field includes a second field, the first field includes Z bits, the second field includes Z' bits, Z is an integer greater than 0, Z' is an integer greater than 0, the Z bits are used to indicate that the frequency domain unit of the first communication device receiving control signals switches from the first frequency domain unit to the second frequency domain unit, and / or, the Z' bits are used to indicate that the frequency domain unit of the first communication device receiving data signals switches from the first frequency domain unit to the second frequency domain unit.

[0040] In some possible implementations, the first control information is downlink control information (DCI).

[0041] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit. Receiving the first control information in the first frequency domain unit includes receiving the first control information in the first frequency domain unit at time T1. The method may also include receiving the control signal in the second frequency domain unit at time T2, wherein the time interval between time T1 and time T2 satisfies an interval time, which includes the sum of the radio frequency (RF) readjustment time and the baseband (BB) readjustment time; or, the BB readjustment time.

[0042] In some possible implementations, the control signal includes at least one of the following: DCI; reference signal (RS) measurement information; synchronization signal and PBCH block (SSB) measurement information; or, synchronization information.

[0043] In some possible implementations, the frequency domain unit is the carrier unit.

[0044] Secondly, a communication method is provided. This method can be executed by a second communication device (e.g., a network device), or by a component of the second communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the second communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core)), or by a logic module or software capable of implementing all or part of the functions of the second communication device. For ease of description, the following explanation uses the execution by the second communication device as an example.

[0045] The method includes: transmitting first control information on a first frequency domain unit, wherein the first control information instructs the frequency domain unit of the first communication device receiving control signals to switch from the first frequency domain unit to a second frequency domain unit, and / or, wherein the first control information instructs the frequency domain unit of the first communication device receiving data signals to switch from the first frequency domain unit to the second frequency domain unit.

[0046] In some possible implementations, before transmitting the first control information on the first frequency domain unit, the method may further include: determining the first control information.

[0047] In some possible implementations, before sending the first control information on the first frequency domain unit, the method may further include: determining the first frequency domain unit.

[0048] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit, and the method may further include: sending the control signal in the second frequency domain unit.

[0049] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit when receiving data signals. The method may also include: transmitting data signals in the second frequency domain unit.

[0050] In some possible implementations, the method further includes: transmitting second control information on one of the n third frequency domain units, where n is an integer greater than 0, the second control information instructing the frequency domain unit of the first communication device receiving control signals to switch from one third frequency domain unit to a fourth frequency domain unit, and / or, the second control information instructing the frequency domain unit of the first communication device receiving data signals to switch from one third frequency domain unit to a fourth frequency domain unit.

[0051] In some other possible implementations, the method further includes: transmitting additional control information on one of the n third frequency domain units, where n is an integer greater than 0; the additional control information does not instruct the first communication device to switch the frequency domain unit receiving the control signal from one third frequency domain unit to a fourth frequency domain unit, and / or, the additional control information does not instruct the first communication device to switch the frequency domain unit receiving the data signal from one third frequency domain unit to a fourth frequency domain unit. The first communication device can receive the control signal and the data signal scheduled by the additional control information on that one third frequency domain unit.

[0052] In some possible implementations, the method may further include: receiving capability information, which indicates that the first communication device supports a maximum number of carriers that can simultaneously receive signals, where m is an integer greater than 1.

[0053] Specifically, m is an integer greater than n+1, n is the number of third frequency domain units, n is an integer greater than 0, and one of the n third frequency domain units is used to receive other control information.

[0054] In some possible implementations, the method may further include: sending frequency domain unit configuration information, the frequency domain unit configuration information indicating multiple frequency domain units, and the frequency domain unit receiving the first control information and / or the frequency domain unit receiving the second control information belonging to multiple frequency domain units.

[0055] The specific implementation method of the second aspect can be referred to the first aspect, and will not be elaborated here.

[0056] The technical effects of the second aspect and its possible implementation methods can be referred to the technical effects of the first aspect and its possible implementation methods.

[0057] Thirdly, a communication method is provided. This method can be executed by a first communication device (e.g., a terminal device), or by a component of the first communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the first communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip)). Alternatively, it can be executed by a logic module or software capable of implementing all or part of the functions of the first communication device. For ease of description, the following explanation uses the execution by the first communication device as an example.

[0058] The method includes: receiving configuration information, the configuration information including a first parameter set and a second parameter set; receiving third control information, the third control information instructing a first communication device to switch from a first cell to a second cell; if the second cell is a primary cell, receiving control signals and data signals on the second cell using the first parameter set, or receiving control signals and data signals on the second cell using the first parameter set and the second parameter set; and / or, if the second cell is a secondary cell, receiving data signals on the second cell using the second parameter set.

[0059] Based on the solution provided in the embodiments of this application, by configuring a parameter set for primary cell handover and a parameter set for secondary cell handover simultaneously for cell handover, compared to configuring parameter sets for different roles according to the role of the cell during the handover process, the cell handover time can be reduced, the cell handover latency can be shortened, and downlink throughput and system efficiency can be improved.

[0060] In some possible implementations, the second cell is in an active state before receiving third control information.

[0061] Based on the solution provided in this application, by having the second cell in an active state before the third control information indicates cell handover, the time for activating the second cell during cell handover can be saved, thereby reducing cell handover time, shortening cell handover latency, and improving downlink throughput and system efficiency.

[0062] In some possible implementations, the values ​​of the first set of parameters are the same when the second cell aggregates with the carriers of other cells; and / or, the values ​​of the second set of parameters are the same when the second cell aggregates with the carriers of other cells.

[0063] Based on the solution provided in the embodiments of this application, by configuring the same parameters for a second cell that performs carrier aggregation with a different cell, the signaling overhead of the configuration parameters can be saved.

[0064] In some possible implementations, when the second cell is the primary cell, a first parameter set is used to receive control signals and data signals on the second cell, and the values ​​of the first parameter set are the same when the second cell aggregates carriers with other cells; or, when the second cell is the primary cell, a first parameter set and a second parameter set are used to receive control signals and data signals on the second cell, and the values ​​of the first parameter set and the second parameter set are the same when the second cell aggregates carriers with other cells; or, when the second cell is the secondary cell, a second parameter set is used to receive data signals on the second cell, and the values ​​of the second parameter set are the same when the second cell aggregates carriers with other cells.

[0065] For example, when different cells are used as second cells, and control signals and data signals are received on the second cells using a first parameter set and a second parameter set, the first parameter set configured for the different cells can be the same. For instance, the types and values ​​of the parameters in the first parameter set configured for the different cells are the same.

[0066] Based on the solution provided in the embodiments of this application, when receiving control signals and data signals on a second cell using a first parameter set and a second parameter set, the signaling overhead of the configuration parameters can be saved by configuring the same first parameter set for different cells as second cells.

[0067] In some possible implementations, when a first set of parameters is used to receive control signals and data signals on the second cell, the first set of parameters includes at least one of the following: radio link monitoring (RLM) configuration information, synchronization reconfiguration information, cell index information, cell common configuration information, cell dedicated configuration information, or synchronization signal block measurement timing configuration (SMTC) information; or, when a second set of parameters is used to receive data signals on the second cell, the second set of parameters includes at least one of the following: cell index information, cell common configuration information, cell dedicated configuration information, or SMTC information; or, when a first set of parameters and a second set of parameters are used to receive control signals and data signals on the second cell, the first set of parameters includes at least one of the following: RLM configuration information or synchronization reconfiguration information; and the second set of parameters includes at least one of the following: cell index information, cell common configuration information, cell dedicated configuration information, or SMTC information.

[0068] Fourthly, a communication method is provided. This method can be executed by a second communication device (e.g., a network device), or by a component of the second communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the second communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core)), or by a logic module or software capable of implementing all or part of the functions of the second communication device. For ease of description, the following explanation uses the execution by the second communication device as an example.

[0069] The method includes: sending configuration information, the configuration information including a first parameter set and a second parameter set; sending third control information, the third control information instructing a first communication device to switch from a first cell to a second cell; if the second cell is a primary cell, sending control signals and data signals on the second cell using the first parameter set, or sending control signals and data signals on the second cell using the first parameter set and the second parameter set; and / or, if the second cell is a secondary cell, sending data signals on the second cell using the second parameter set.

[0070] In some possible implementations, the second cell is in an active state before sending the third control information.

[0071] In some possible implementations, when the second cell is the primary cell, control signals and data signals are transmitted on the second cell using a first parameter set, and the values ​​of the first parameter set are the same when the second cell aggregates with carriers of other cells; or, when the second cell is the primary cell, control signals and data signals are transmitted on the second cell using a first parameter set and a second parameter set, and the values ​​of the first parameter set and the second parameter set are the same when the second cell aggregates with carriers of other cells; or, when the second cell is the secondary cell, data signals are transmitted on the second cell using a second parameter set, and the values ​​of the second parameter set are the same when the second cell aggregates with carriers of other cells.

[0072] In some possible implementations, when a first parameter set is used to transmit control signals and data signals on the second cell, the first parameter set includes at least one of the following: Radio Link Monitoring (RLM) configuration information, Synchronization Reconfiguration information, Cell Index information, Cell Common Configuration information, Cell Dedicated Configuration information, or Synchronization Signal Block Measurement Timing Configuration (SMTC) information; or, when a second parameter set is used to transmit data signals on the second cell, the second parameter set includes at least one of the following: Cell Index information, Cell Common Configuration information, Cell Dedicated Configuration information, or SMTC information; or, when a first parameter set and a second parameter set are used to transmit control signals and data signals on the second cell, the first parameter set includes at least one of the following: RLM configuration information or Synchronization Reconfiguration information; and the second parameter set includes at least one of the following: Cell Index information, Cell Common Configuration information, Cell Dedicated Configuration information, or SMTC information.

[0073] The specific implementation method of the fourth aspect can be referred to the third aspect, and will not be elaborated here.

[0074] The technical effects of the fourth aspect and its possible implementation methods can be referred to the technical effects of the third aspect and its possible implementation methods.

[0075] Fifthly, a communication method is provided. This method can be executed by a first communication device (e.g., a terminal device), or by a component of the first communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the first communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip)). Alternatively, it can be executed by a logic module or software capable of implementing all or part of the functions of the first communication device. For ease of description, the following explanation uses the execution by the first communication device as an example.

[0076] The method includes: receiving configuration information, the configuration information including a third parameter set, wherein the first communication device uses the third parameter set to receive control signals and data signals in different cells; and receiving third control information, the third control information instructing the first communication device to switch from the first cell to the second cell.

[0077] Based on the solution provided in the embodiments of this application, by configuring a set of parameters for cell handover that can be used for both primary cell handover and secondary cell handover, compared to configuring different sets of parameters for different roles according to the role of the cell during the handover process, the handover process can be simplified and the handover complexity can be reduced.

[0078] In some possible implementations, the first communication device uses a third parameter set to receive control signals and data signals in different cells, including: the parameters in the third parameter set used by the first communication device in different cells are of the same type; the values ​​of the parameters in the third parameter set used by the first communication device in different cells are the same or different.

[0079] In some possible implementations, the second cell is in an active state before receiving third control information.

[0080] Based on the solution provided in this application, by having the second cell in an active state before the third control information indicates cell handover, the time for activating the second cell during cell handover can be saved, thereby reducing cell handover time, shortening cell handover latency, and improving downlink throughput and system efficiency.

[0081] In some possible implementations, the values ​​of the third parameter set are the same when the second cell and other cells aggregate carriers.

[0082] Based on the solution provided in the embodiments of this application, by configuring the same parameters for a second cell that performs carrier aggregation with a different cell, the signaling overhead of the configuration parameters can be saved.

[0083] In some possible implementations, the third parameter set includes at least one of the following: Radio Link Monitoring (RLM) configuration information, Synchronization Reconfiguration information, Cell Index information, Cell Common Configuration information, Cell Private Configuration information, or Synchronization Signal Block Measurement Timing Configuration (SMTC) information.

[0084] Sixthly, a communication method is provided, which can be executed by a second communication device (e.g., a network device), or by a component of the second communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the second communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a SoC chip or SIP chip containing a modem core)), or by a logic module or software capable of implementing all or part of the functions of the second communication device. For ease of description, the following explanation uses the execution by the second communication device as an example.

[0085] The method includes: sending configuration information, which includes a third parameter set, wherein the first communication device uses the third parameter set to receive control signals and data signals in different cells; and sending third control information, which instructs the first communication device to switch from the first cell to the second cell.

[0086] In some possible implementations, the first communication device uses a third parameter set to receive control signals and data signals in different cells, including: the parameters in the third parameter set used by the first communication device in different cells are of the same type; the values ​​of the parameters in the third parameter set used by the first communication device in different cells are the same or different.

[0087] In some possible implementations, the second cell is in an active state before sending the third control information.

[0088] The specific implementation method of the sixth aspect can be referred to the fifth aspect, and will not be elaborated here.

[0089] The technical effects of the sixth aspect and its possible implementation methods can be referred to the technical effects of the fifth aspect and its possible implementation methods.

[0090] In a seventh aspect, a communication device is provided for performing the method provided in the first aspect and its possible implementations. The communication device may be a first communication device, or a component of the first communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the first communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip)). Alternatively, it may be a logic module or software capable of implementing all or part of the functions of the first communication device. For ease of description, the following description will use the device as the first communication device and the device that jointly implements communication with the device as the second communication device as an example.

[0091] The device includes a transceiver unit, which is configured to: receive first control information in a first frequency domain unit, wherein the first control information instructs the first communication device to switch the frequency domain unit for receiving control signals from the first frequency domain unit to a second frequency domain unit, and / or, wherein the first control information instructs the first communication device to switch the frequency domain unit for receiving data signals from the first frequency domain unit to the second frequency domain unit.

[0092] In some possible implementations, the apparatus further includes a processing unit for determining a first frequency domain unit.

[0093] In some possible implementations, the transceiver unit is also used to receive control signals in the second frequency domain unit.

[0094] In some possible implementations, the transceiver unit is also used to receive data signals in the second frequency domain unit.

[0095] In some possible implementations, the transceiver unit is specifically used to: receive first control information in a first frequency domain unit, receive second control information in one of n third frequency domain units, where n is an integer greater than 0, the second control information instructing the first communication device to switch the frequency domain unit for receiving control signals from one third frequency domain unit to a fourth frequency domain unit, and / or, the second control information instructing the first communication device to switch the frequency domain unit for receiving data signals from one third frequency domain unit to a fourth frequency domain unit.

[0096] In some other possible implementations, the transceiver unit is specifically configured to: receive first control information in a first frequency domain unit; receive other control information in one of n third frequency domain units, where n is an integer greater than 0; the other control information does not instruct the first communication device to switch the frequency domain unit for receiving control signals from one third frequency domain unit to a fourth frequency domain unit; and / or, the other control information does not instruct the first communication device to switch the frequency domain unit for receiving data signals from one third frequency domain unit to a fourth frequency domain unit. The first communication device can receive control signals and data signals scheduled by the other control information in that one third frequency domain unit.

[0097] In some possible implementations, the processing unit is also used to: determine capability information.

[0098] In some possible implementations, the transceiver unit is also used to: transmit capability information, which indicates that the first communication device supports a maximum number of carriers that can simultaneously receive signals, where m is an integer greater than 1.

[0099] In some possible implementations, the transceiver unit is also used to: receive frequency domain unit configuration information, the frequency domain unit configuration information indicating multiple frequency domain units, and the frequency domain unit receiving the first control information and / or the frequency domain unit receiving the second control information belonging to multiple frequency domain units.

[0100] In some possible implementations, the transceiver unit is specifically used to: receive first control information in the first frequency domain unit at time T1; and receive control signals in the second frequency domain unit at time T2, wherein the time interval between time T1 and time T2 satisfies an interval time, which includes the sum of the RF readjustment time and the BB readjustment time; or, the BB readjustment time.

[0101] In some possible implementations, the processing unit includes a processor.

[0102] In some possible implementations, the transceiver unit includes a transceiver, or an input / output interface. Optionally, the input / output interface can be input / output circuitry.

[0103] In some other possible implementations, the communication device may be a chip, chip system, or circuit, and the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; the processing unit may be at least one processor, processing circuit, or logic circuit.

[0104] The specific implementation method of the seventh aspect can be referred to the first aspect, and will not be elaborated here.

[0105] Eighthly, a communication device is provided for performing the method provided in the second aspect and its possible implementations. The communication device can be a second communication device, or a component of a second communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the second communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip)). Alternatively, it can be a logic module or software capable of implementing all or part of the functions of the second communication device. For ease of description, the following description will use the device as a second communication device and the device that jointly implements communication with the device as a first communication device as an example.

[0106] The device includes a transceiver unit, which is configured to: transmit first control information on a first frequency domain unit, wherein the first control information instructs the frequency domain unit of the first communication device receiving control signals to switch from the first frequency domain unit to the second frequency domain unit, and / or, wherein the first control information instructs the frequency domain unit of the first communication device receiving data signals to switch from the first frequency domain unit to the second frequency domain unit.

[0107] In some possible implementations, the device further includes a processing unit for determining first control information.

[0108] In some possible implementations, the processing unit is also used to: determine the first frequency domain unit.

[0109] In some possible implementations, the transceiver unit is also used to transmit control signals in the second frequency domain unit.

[0110] In some possible implementations, the transceiver unit is also used to transmit data signals in the second frequency domain unit.

[0111] In some possible implementations, the transceiver unit is specifically used to: transmit first control information on a first frequency domain unit, transmit second control information on one of n third frequency domain units, where n is an integer greater than 0, the second control information instructing the first communication device to switch the frequency domain unit receiving the control signal from one third frequency domain unit to a fourth frequency domain unit, and / or, the second control information instructing the first communication device to switch the frequency domain unit receiving the data signal from one third frequency domain unit to a fourth frequency domain unit.

[0112] In some other possible implementations, the transceiver unit is specifically configured to: transmit first control information on a first frequency domain unit; transmit other control information on one of n third frequency domain units, where n is an integer greater than 0; the other control information does not instruct the first communication device to switch the frequency domain unit receiving control signals from one third frequency domain unit to a fourth frequency domain unit; and / or, the other control information does not instruct the first communication device to switch the frequency domain unit receiving data signals from one third frequency domain unit to a fourth frequency domain unit. The first communication device can receive control signals and data signals scheduled by the other control information on that one third frequency domain unit.

[0113] In some possible implementations, the transceiver unit is also used to: receive capability information, which indicates that the first communication device supports a maximum number of carriers that can simultaneously receive signals, where m is an integer greater than 1.

[0114] In some possible implementations, the processing unit is also used to: determine frequency domain unit configuration information.

[0115] In some possible implementations, the transceiver unit is also used to: transmit frequency domain unit configuration information, the frequency domain unit configuration information indicating multiple frequency domain units, and the frequency domain unit receiving the first control information and / or the frequency domain unit receiving the second control information belonging to multiple frequency domain units.

[0116] In some possible implementations, the transceiver unit is specifically used to: transmit first control information on the first frequency domain unit at time T1; and transmit control signals on the second frequency domain unit at time T2, wherein the time interval between time T1 and time T2 satisfies an interval time, which includes the sum of the RF readjustment time and the BB readjustment time; or, the BB readjustment time.

[0117] In some possible implementations, the processing unit includes a processor.

[0118] In some possible implementations, the transceiver unit includes a transceiver, or an input / output interface. Optionally, the input / output interface can be input / output circuitry.

[0119] In some other possible implementations, the communication device may be a chip, chip system, or circuit, and the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit; the processing unit may be at least one processor, processing circuit, or logic circuit.

[0120] The specific implementation method of the eighth aspect can be referred to the second aspect, and will not be elaborated here.

[0121] Ninthly, a communication apparatus is provided for performing the method provided in the third aspect and its possible implementations. The communication apparatus may be a first communication device, or a component of the first communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the first communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip)). Alternatively, it may be a logic module or software capable of implementing all or part of the functions of the first communication device. For ease of description, the following description will use the apparatus as the first communication apparatus and the apparatus that jointly implements communication with the apparatus as the second communication apparatus as an example.

[0122] The device includes a transceiver unit, which is configured to: receive configuration information, including a first parameter set and a second parameter set; receive third control information, which instructs the first communication device to switch from a first cell to a second cell; if the second cell is a primary cell, receive control signals and data signals on the second cell using the first parameter set, or receive control signals and data signals on the second cell using the first parameter set and the second parameter set; and / or, if the second cell is a secondary cell, receive data signals on the second cell using the second parameter set.

[0123] In some possible implementations, the transceiver unit is specifically used to: when the second cell is the primary cell, receive control signals and data signals on the second cell using a first parameter set, where the values ​​of the first parameter set are the same when the second cell aggregates carriers with other cells; or, when the second cell is the primary cell, receive control signals and data signals on the second cell using a first parameter set and a second parameter set, where the values ​​of the first parameter set are the same when the second cell aggregates carriers with other cells, and the values ​​of the second parameter set are the same when the second cell aggregates carriers with other cells; or, when the second cell is the secondary cell, receive data signals on the second cell using a second parameter set, where the values ​​of the second parameter set are the same when the second cell aggregates carriers with other cells.

[0124] In some possible implementations, the transceiver unit includes a transceiver, or an input / output interface. Optionally, the input / output interface can be input / output circuitry.

[0125] In some other possible implementations, the communication device may be a chip, chip system, or circuit, and the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit.

[0126] The specific implementation method of the ninth aspect can be referred to the third aspect, and will not be elaborated here.

[0127] In a tenth aspect, a communication device is provided for performing the method provided in the fourth aspect and its possible implementations. The communication device can be a second communication device, or a component of a second communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the second communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip)). Alternatively, it can be a logic module or software capable of implementing all or part of the functions of the second communication device. For ease of description, the following description will use the device as a second communication device and the device that jointly implements communication with the device as a first communication device as an example.

[0128] The device includes a transceiver unit, which is configured to: transmit configuration information, including a first parameter set and a second parameter set; transmit third control information, which instructs the first communication device to switch from a first cell to a second cell; when the second cell is the primary cell, transmit control signals and data signals on the second cell using the first parameter set, or transmit control signals and data signals on the second cell using the first parameter set and the second parameter set; and / or, when the second cell is the secondary cell, transmit data signals on the second cell using the second parameter set.

[0129] In some possible implementations, the transceiver unit is specifically used to: transmit control signals and data signals on the second cell using a first parameter set when the second cell is the primary cell, wherein the values ​​of the first parameter set are the same when the second cell aggregates carriers with other cells; or, when the second cell is the primary cell, transmit control signals and data signals on the second cell using a first parameter set and a second parameter set, wherein the values ​​of the first parameter set are the same when the second cell aggregates carriers with other cells, and the values ​​of the second parameter set are the same when the second cell aggregates carriers with other cells; or, when the second cell is the secondary cell, transmit data signals on the second cell using a second parameter set, wherein the values ​​of the second parameter set are the same when the second cell aggregates carriers with other cells.

[0130] In some possible implementations, the transceiver unit includes a transceiver, or an input / output interface. Optionally, the input / output interface can be input / output circuitry.

[0131] In some other possible implementations, the communication device may be a chip, chip system, or circuit, and the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit.

[0132] The specific implementation method of the tenth aspect can be referred to the fourth aspect, and will not be elaborated here.

[0133] Eleventhly, a communication device is provided for performing the method provided in the fifth aspect and its possible implementations. The communication device may be a first communication device, or a component of the first communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the first communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip)). Alternatively, it may be a logic module or software capable of implementing all or part of the functions of the first communication device. For ease of description, the following description will use the device as the first communication device and the device that jointly implements communication with the device as the second communication device as an example.

[0134] The device includes a transceiver unit, which is used to: receive configuration information, the configuration information including a third parameter set, wherein the first communication device uses the third parameter set to receive control signals and data signals in different cells; and receive third control information, the third control information instructing the first communication device to switch from the first cell to the second cell.

[0135] In some possible implementations, the transceiver unit includes a transceiver, or an input / output interface. Optionally, the input / output interface can be input / output circuitry.

[0136] In some other possible implementations, the communication device may be a chip, chip system, or circuit, and the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit.

[0137] The specific implementation method of the eleventh aspect can be referred to the fifth aspect, and will not be elaborated here.

[0138] In a twelfth aspect, a communication apparatus is provided for performing the method provided in the sixth aspect and its possible implementations. The communication apparatus may be a second communication device, or a component of a second communication device (e.g., a processor, chip, or chip system, such as a circuit or chip in the second communication device responsible for communication functions (e.g., a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip containing a modem core, or a system-in-package (SIP) chip)). Alternatively, it may be a logic module or software capable of implementing all or part of the functions of the second communication device. For ease of description, the following description will use the apparatus as a second communication device and the apparatus that jointly implements communication with the apparatus as a first communication device as an example.

[0139] The device includes a transceiver unit, which is used to: send configuration information, the configuration information including a third parameter set, wherein the first communication device uses the third parameter set to receive control signals and data signals in different cells; and send third control information, the third control information instructing the first communication device to switch from the first cell to the second cell.

[0140] In some possible implementations, the transceiver unit includes a transceiver, or an input / output interface. Optionally, the input / output interface can be input / output circuitry.

[0141] In some other possible implementations, the communication device may be a chip, chip system, or circuit, and the transceiver unit may be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip, chip system, or circuit.

[0142] The specific implementation method of the twelfth aspect can be referred to the sixth aspect, and will not be elaborated here.

[0143] In a thirteenth aspect, this application provides a communication device including at least one processor for performing the methods provided in the first to sixth aspects and any of their possible implementations.

[0144] Unless otherwise specified, or if it does not contradict its actual function or internal logic in the relevant description, the transmission and acquisition / reception operations involved in the processor can be understood as processor output and reception, input and other operations, or as transmission and reception operations performed by radio frequency circuits and antennas. This application does not limit them in this regard.

[0145] In some possible implementations, the communication device further includes a memory for storing computer programs or instructions; and / or, the communication device further includes a communication interface coupled to at least one processor for inputting and / or outputting information.

[0146] In a fourteenth aspect, a computer-readable storage medium is provided that stores program code for execution by a device, the program code including methods for performing the first to sixth aspects described above and any of their possible implementations.

[0147] In a fifteenth aspect, a computer program product containing instructions is provided, which, when run on a computer, causes the computer to perform the methods provided in the first to sixth aspects and any of their possible implementations.

[0148] In a sixteenth aspect, a chip is provided, the chip including one or more processors and a communication interface, wherein the processor reads computer programs or instructions stored in a memory through the communication interface and executes the methods provided in the first to sixth aspects and any of their possible implementations.

[0149] Optionally, as one implementation, the chip also includes a memory storing computer programs or instructions, and a processor for executing the computer programs or instructions stored in the memory. When the computer programs or instructions are executed, the processor is used to perform the methods provided by the first to sixth aspects and any of their possible implementations.

[0150] In a seventeenth aspect, a communication system is provided, comprising a first communication device for performing the first aspect and any of its possible implementations, and a second communication device for performing the second aspect and any of its possible implementations; or, comprising a first communication device for performing the third aspect and any of its possible implementations, and a second communication device for performing the fourth aspect and any of its possible implementations; or, comprising a first communication device for performing the fifth aspect and any of its possible implementations, and a second communication device for performing the sixth aspect and any of its possible implementations.

[0151] The beneficial effects of aspects seven through seventeen above can be referenced from aspects one through six above and any of their possible implementations, and will not be elaborated here. Attached Figure Description

[0152] Figure 1 This is a schematic diagram of a wireless communication system applicable to embodiments of this application.

[0153] Figure 2 This is an application scenario applicable to the embodiments of this application.

[0154] Figure 3 This is a schematic diagram of carrier aggregation.

[0155] Figure 4 This is a handover process diagram illustrating the handover of the downlink carrier unit of the primary cell by introducing signaling indications of the media access control control element in L1 / L2 triggered mobility (LTM).

[0156] Figure 5 This is a schematic flowchart of a communication method provided in an embodiment of this application.

[0157] Figure 6 This is a schematic flowchart of a communication method provided in an embodiment of this application.

[0158] Figure 7 This is a schematic flowchart of a communication method provided in an embodiment of this application.

[0159] Figure 8 This is a schematic block diagram of a communication device provided in an embodiment of this application.

[0160] Figure 9 This is a schematic diagram of another communication device provided in an embodiment of this application.

[0161] Figure 10 This is a schematic diagram of a chip system provided in an embodiment of this application. Detailed Implementation

[0162] To facilitate understanding of the embodiments of this application, the following points will be explained first.

[0163] Before introducing the scheme of this application, the following points should be noted.

[0164] (1) The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, "a plurality of" or "multiple" means two or more; the singular expressions "a," "an," "the," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, "at least one," "at least one," and "one or more" refer to one, two, or more. "And / or" describes the relationship between related objects, indicating that three relationships may exist, for example, A and / or B, which can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b, and c. Here, a, b, and c can be a single term or multiple terms.

[0165] (2) In the embodiments of this application, the ordinal numbers such as "first," "second," "#1," and "#2" are used to distinguish multiple objects and are not used to limit the size, content, order, timing, priority, or importance of the multiple objects. For example, the first information and the second information can be the same information or different information, and such names do not indicate differences in the content, size, application scenario, sending / receiving end, priority, or importance of the two pieces of information. In addition, the step numbers in the various embodiments described in this application are only for distinguishing different steps, and unless otherwise stated, the step numbers are not used to limit the order of steps.

[0166] (3) In this application, "send" and "receive" indicate the direction of signal transmission, and "transmission" can include at least one of sending and / or receiving. For example, "send information to XX" can be understood as the destination of the information being XX, which can include direct transmission via the air interface or indirect transmission by other units or modules via the air interface. "Receive information from YY" can be understood as the source of the information being YY, which can include direct reception from YY via the air interface or indirect reception from YY by other units or modules via the air interface. "Send" can also be understood as the "output" of the chip interface, and "receive" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be performed between devices, such as between network devices and terminal devices, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via a bus, wiring, or interface.

[0167] (4) In this application, the terms “comprising,” “having,” “including,” and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus; or, information #A includes B, which may be equivalent to information #A carrying the entire contents of B.

[0168] (5) In this application, "instruction" can include direct instruction and indirect instruction. When describing a certain instruction information A, it can include either direct instruction A or indirect instruction A. Unless otherwise stated, this does not necessarily mean that the instruction information carries A. Direct instruction information A means that information A is included; implicit instruction information A means that information A is indicated through the correspondence between information A and information B and the direct instruction information B. The correspondence between information A and information B can be predefined, pre-stored, pre-burned, or pre-configured.

[0169] (6) References to “one embodiment” or “some embodiments” as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, phrases such as “in some possible implementations” or “in other possible implementations” appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean “one or more, but not all, embodiments”, unless otherwise specifically emphasized. The terms “comprising,” “including,” “having,” and variations thereof mean “including, but not limited to,” unless otherwise specifically emphasized.

[0170] (7) In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terms and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0171] (8) In this application, the terms "exemplary," "for example," "as an example," etc., are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as an "example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the term "example" is intended to present a concept in a concrete manner. In the embodiments of this application, "of," "corresponding, relevant," and "corresponding" may sometimes be used interchangeably, and it should be noted that their intended meanings are consistent unless their distinction is emphasized.

[0172] (9) In this application, the descriptions such as “when…”, “under the circumstances of…”, “based on the circumstances of…”, “if…” all refer to the fact that the device will make corresponding processing or make corresponding understanding of information under certain objective circumstances. They are not time limits, nor do they require the device to make judgments when it is implemented, nor do they mean that there are other limitations.

[0173] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0174] The technical solutions of this application embodiment can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, 5th Generation (5G) systems, or New Radio (NR) systems and future communication systems, vehicle-to-X (V2X) communication, where V2X can include vehicle-to-network (V2N), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P), etc., Long Term Evolution-Vehicle (LTE-V) communication, vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), Long Term Evolution-Machine (LTE-M) communication, machine-to-machine (M2M) communication, and wireless local area networks (WLANs). (network, WLAN, etc.)

[0175] For example, satellite communication systems can be integrated with traditional mobile communication systems.

[0176] Figure 1 This is a schematic diagram of a wireless communication system 10 applicable to embodiments of this application. For example... Figure 1 As shown, the wireless communication system includes a wireless access network 100. The wireless access network 100 can be a next-generation (e.g., future communication networks or higher) wireless access network, or a traditional (e.g., 5G, 4G, 3G, or 2G) wireless access network. One or more terminal devices (120a-120j, collectively referred to as 120) can be interconnected or connected to one or more network devices (110a, 110b, collectively referred to as 110) within the wireless access network 100. Network elements in the wireless communication system are connected via interfaces (e.g., NG, Xn) or over-the-air interfaces.

[0177] Figure 1This is just an illustration; the wireless communication system may also include other devices, such as core network (CN) equipment, wireless relay equipment, and / or wireless backhaul equipment. Figure 1 It is not shown in the middle.

[0178] In practical applications, this wireless communication system can include multiple network devices and multiple terminal devices simultaneously, without limitation. A network device can serve one or more terminal devices simultaneously. A terminal device can also access one or more network devices simultaneously. The embodiments of this application do not limit the number of terminal devices and network devices included in the wireless communication system.

[0179] The communication system described above for use in the embodiments of this application is merely an example. The communication system applicable to the embodiments of this application is not limited to this. Any communication system capable of implementing the functions of the above-described devices is applicable to the embodiments of this application.

[0180] In this application, the terminal device can refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device can also be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device, or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in a 5G network, or terminal device in a future public land mobile network (PLMN), etc. This application does not limit the scope of the terminal device to these specific types.

[0181] Wearable devices, also known as wearable smart devices, are a general term for devices that utilize wearable technology to intelligently design and develop everyday wearables, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not merely hardware devices; they achieve powerful functions through software support, data interaction, and cloud interaction. Broadly defined, wearable smart devices include those with comprehensive functions, large sizes, and the ability to perform complete or partial functions without relying on a smartphone, such as smartwatches or smart glasses. They also include devices focused on a specific application function that require the use of other devices, such as smart bracelets and smart jewelry for vital sign monitoring.

[0182] Furthermore, terminal devices can also be terminal devices in Internet of Things (IoT) systems. IoT is an important component of future information technology development, and its main technical feature is connecting objects to networks through communication technologies, thereby realizing an intelligent network that enables human-machine interconnection and machine-to-machine interconnection.

[0183] It should be understood that this application does not limit the specific form of the terminal device.

[0184] A network device can be a device within a wireless network. For example, a network device can be a device deployed in a wireless network to provide wireless communication capabilities for terminal devices. For instance, a network device can be a radio access network (RAN) node that connects terminal devices to the wireless network. The RAN can be connected to the core network (e.g., the core network of an LTE system, or the core network of 5G, etc.).

[0185] The network devices in this application embodiment can be access network devices, including but not limited to: various base stations, such as next-generation node B (gNodeB, gNB), evolved node B (eNB), or base station equipment in future evolved communication systems; they can also be enabling servers, wearable devices, vehicle-mounted devices, wireless relay nodes, wireless backhaul nodes, transmission points (TP), transceiver stations, cells, or transmission and reception points (TRP), etc.; they can also be one or a group of antenna panels (including multiple antenna panels) of a base station; or they can be network nodes constituting a base station, such as a bandwidth-based unit (BBU) or a distributed unit (DU), etc. The base station can be a macro base station, micro base station, pico base station, small cell, relay station, or balloon station, etc.

[0186] The network device in this application embodiment can also be a core network device, including but not limited to: access and mobility management function (AMF) network element, session management function (SMF) network element, user plane function (UPF) network element, policy control function (PCF) network element, or unified data management (UDM) network element, etc.

[0187] Application layer network elements refer to network devices in computer networks that are responsible for processing application layer protocols, including but not limited to: data collection application function (DCAF) network elements, provisioning application function (PAF) network elements, event consumer application function (ECAF) network elements, etc.

[0188] It is understood that all or part of the functions of the network device or terminal device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform).

[0189] In some deployments, the network devices mentioned in the embodiments of this application may be devices including centralized units (CU), DU, or devices including CU and DU, or devices with control plane CU nodes (central unit-control plane (CU-CP)) and user plane CU nodes (central unit-user plane (CU-UP)) and DU nodes. For example, the network devices may include gNB-CU-CP, gNB-CU-UP, and gNB-DU.

[0190] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes each implementing some of the base station's functions. For example, RAN nodes can be CUs, DUs, CU-CPs, CU-UPs, or radio units (RUs). CUs and DUs can be configured separately or included in the same network element, such as a BBU. RUs can be included in radio equipment or radio units, such as remote radio units (RRUs), active antenna systems (AAUs), or remote radio heads (RRHs).

[0191] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an ORAN system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called open radio unit (O-RU). Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented through software modules, hardware modules, or a combination of software modules and hardware modules.

[0192] The embodiments of this application are applicable to, for example, Figure 1 The illustrated multi-carrier communication system is an example of an NR system. This system includes uplink (from terminal device to network device) and downlink (from network device to terminal device) communication. According to the LTE / NR protocol, uplink communication includes the transmission of uplink physical channels and uplink signals, while downlink communication includes the transmission of downlink physical channels and downlink signals. The uplink physical channels include: random access channels, physical uplink control channels, and physical uplink shared channels (PUSCH), etc. Uplink signals include: sounding reference signals and demodulation reference signals, etc. Downlink physical channels include: broadcast channels, physical downlink control channels (PDCCH), and physical downlink shared channels (PDSCH), etc. Downlink signals include: synchronization signals, demodulation reference signals, channel state information reference signals, cell reference signals, etc., which are not specifically limited in this application.

[0193] It is understood that in the embodiments of this application, the names of the channels or signals mentioned above are only examples, and there may be different names in different systems and different scenarios. The embodiments of this application do not limit this.

[0194] In the embodiments of this application, "wireless communication" can be simply referred to as "communication". "Communication" can also be described as "data transmission", "information transmission", "data processing", etc. This application does not make specific limitations in this regard.

[0195] To facilitate understanding of the embodiments of this application, some basic concepts involved in this application will be briefly explained.

[0196] 1. Temporal Resources: Resource units in the temporal domain, which can be symbols, slots, mini-slots, sub-frames, frames, etc. This application does not impose any limitations on the representation of temporal resources.

[0197] 2. Frequency domain resources or frequency domain units: Resource units in the frequency domain can be resource elements (REs), resource blocks (RBs), channels, subchannels, control channel elements, resource pools, bandwidth parts (BWPs), carriers, bands, etc. This application does not impose any limitations on the representation of frequency domain resources.

[0198] For example, in this application, the carrier may also be referred to as a component carrier (CC), and the carrier and the component carrier can be used interchangeably below.

[0199] 3. Cell: Refers to a logical entity. Each cell has a cell identifier (ID), and generally carries the broadcast information configured for that cell on its downlink carrier. In this application, in order to communicate with the base station, the terminal needs to establish a radio connection with a cell controlled by the base station. The cell with which the terminal has established a radio connection is called the terminal's serving cell. When the terminal communicates with the serving cell, it will also be subject to interference from signals from neighboring cells. A cell may include a downlink carrier and / or an uplink carrier. The UE can access the cell and transmit uplink information on the cell's uplink carrier and / or transmit downlink information on the cell's downlink carrier.

[0200] Figure 2This illustrates an application scenario applicable to embodiments of this application. When applying carrier aggregation technology, cell #1 can be the primary cell (PCell). The terminal device and the PCell communicate via the primary carrier component (PCC). The operating frequency of cell #1 (or the center frequency of the PCC) is F1, which can be a low frequency, or in other words, F1 belongs to the low frequency range. A radio resource control (RRC) connection is established between the PCell and the terminal device. The PCell is the cell established when the terminal device initiates an initial connection, or the cell for RRC connection reconstruction, or the PCell designated during handover. Cells #2 and #3 are two different secondary cells (SCells), which can be referred to as SCell #1 and SCell #2, used to provide additional radio resources. There is no RRC connection between the SCells and the terminal device. The SCells are added / modified / released via RRC connection reconfiguration messages only after the initial security activation process. Specifically, the terminal device and cell #2 communicate via secondary carrier component (SCC) #1, with cell #2 having a frequency of F2 (or the center frequency of SCC #1). The terminal device and cell #2 also communicate via SCC #2, with cell #3 having a frequency of F3 (or the center frequency of SCC #2). F2 and F3 can be high frequencies, or in other words, F2 and F3 belong to the high frequency range.

[0201] 4. Carrier Aggregation (CA): To meet the requirements for increased peak rates (e.g., the requirement for increased peak rates in enhanced make-before-break (eMBB) scenarios), increasing cell bandwidth can be considered. However, the maximum bandwidth of a single cell is fixed. Therefore, the bandwidth of multiple cells is aggregated for use by the UE; this is the idea behind CA technology. CA technology can aggregate 2 to 5 carriers together, increasing the system transmission bandwidth and effectively improving uplink and downlink transmission rates. Figure 3 As shown, five 20 MHz carriers (CCs) can be combined to achieve a transmission bandwidth of 100 MHz. The terminal determines the maximum number of carriers it can utilize simultaneously for uplink and downlink transmission based on its own capabilities.

[0202] It should be understood that Figure 3 The CA method is merely an example and does not constitute any limitation on the scope of protection of this application. CA technology can support continuous or non-continuous carrier aggregation, which will not be further described here.

[0203] In existing CA systems, the number of uplink and downlink CCs is generally the same, or the number of downlink CCs is greater than the number of uplink CCs (for example, a UE must support both 4 UL CCs and 4 DL CCs to support uplink). However, different scenarios have different uplink and downlink service requirements. Decoupling uplink and downlink capabilities can improve uplink capabilities while avoiding the need to improve downlink capabilities. For example, a UE might want to support the transmission of 4 UL CCs but only the reception of 2 DL CCs.

[0204] In one possible scenario, when scheduling among four DL CCs, the base station can consistently select two DL CCs as the receiving CCs. However, considering the congestion and load conditions on different CCs, as well as the differences in frequency points and bandwidths among the different DL CCs, the UE can select two CCs from the four CCs for scheduling. This can achieve greater gain and obtain load balancing and frequency selection gain.

[0205] The above text combined Figure 1 This paper briefly introduces the scenarios in which the communication method provided in the embodiments of this application can be applied, as well as the basic concepts that may be involved in the embodiments of this application. Among the basic concepts, carrier aggregation technology and multi-carrier single-cell configuration are introduced.

[0206] For example, a base station can schedule frequency domain units based on the situation of different frequency domain units. For instance, taking a frequency domain unit as a CC, when selecting at least two CCs for scheduling among multiple CCs using carrier aggregation technology, a PCell handover may be required. PCell handover can be achieved through RRC reconfiguration or by introducing media access control (MAC) control element (CE) signaling indications in L1 / L2 triggered mobility (LTM).

[0207] The following is combined Figure 4 Briefly describe the handover process for PCell handover by introducing MAC CE signaling indication in LTM.

[0208] Figure 4 In the process shown, before S401, the UE is in a connected state with cell #1, which is the serving cell that provides services to the current UE.

[0209] S401, the UE sends a "measurement reporting" message to the base station of cell #1, and the base station of cell #1 decides to configure LTM and initiate LTM preparation.

[0210] S402, the base station of cell #1 transmits "RRC reconfiguration" information to the UE. The "RRC reconfiguration" information includes LTM candidate configurations. The LTM candidate configurations include other cells besides cell #1. Other cells besides cell #1 can also be called candidate cells, which refer to potential target cells.

[0211] S403, the UE stores the LTM candidate configuration in the "RRC reconfiguration" information and transmits the "RRC reconfiguration complete" information to the base station of cell #1.

[0212] S404a, before receiving the handover command for cell #1, the UE performs downlink synchronization within the cell of the LTM candidate configuration. The UE can activate and deactivate the transmission configuration indicator (TCI) state of the cell within the LTM candidate configuration.

[0213] S404b uses UE-based time advance (TA) measurements to perform uplink synchronization with LTM candidate cells before receiving a handover command.

[0214] S405, the UE performs L1 measurement on the LTM candidate configuration cells and sends an L1 measurement report to the base station of cell #1 (the UE should perform L1 measurement as long as the base station of cell #1 transmits "RRC reconfiguration" information to the UE in S402).

[0215] The base station of cell #1 determines whether cell handover is required based on the L1 measurement report. If cell handover is required, steps S406 to S408 can be continued.

[0216] S406, the base station of cell #1 performs cell handover and sends the LTM cell handover command MAC CE to trigger cell handover.

[0217] S407, If the UE does not have the TA value of the base station of the target cell, the UE performs a random access procedure to the base station of the target cell.

[0218] In step S408, the UE sends an RRCReconfigurationComplete message to the target cell, completing the LTM cell handover process. The UE's serving cell changes from cell #1 to the target cell, and the UE can receive control signaling or service data through the target cell's CC.

[0219] For example, taking two LTM handovers as an example, before the first LTM handover, cell #1 is the serving cell, and cells #2 and #3 are candidate cells. After the first LTM handover, the terminal device's serving cell changes from cell #1 to cell #2. Cell #2 becomes the serving cell after the first LTM handover and also the serving cell before the second LTM handover. Cell #1 becomes a candidate cell for the second LTM handover, and cell #3 remains a candidate cell. After the second LTM handover, the terminal device changes from cell #2 to cell #3. Cell #3 becomes the serving cell after the second LTM handover, cell #2 becomes a candidate cell for the third LTM handover, and cell #1 remains a candidate cell.

[0220] In the above steps, S401 to S403 can also be called the LTM preparation stage; S404a to S404b can also be called early synchronization; S404 to S407 can also be called LTM cell handover execution; and S408 can also be called LTM cell handover completion.

[0221] In the above steps, after cell handover, all cells except the primary and secondary cells will be deactivated. For example, if the primary cell is switched from cell #1 to cell #2, and cell #1 is no longer the UE's secondary cell, cell #1 will be deactivated. If a subsequent cell handover requires switching the UE's primary or secondary cell to cell #1, cell #1 must first be activated to make it active.

[0222] It should be understood that the above Figure 4 The steps and their textual descriptions in the above are merely illustrative. There are other ways to implement the handover process for PCell switching by introducing MAC CE signaling indications in LTM; please refer to relevant technologies for details, which will not be elaborated upon here. Figure 4 The textual description thereof does not constitute a limitation on the embodiments of this application.

[0223] The UE cannot communicate during PCell handover. For RRC reconfiguration handover of the PCell, the handover latency is too high (e.g., RRC reconfiguration handover latency can reach 63ms). While LTM introduces MAC CE signaling to indicate PCell handover, significant handover latency still exists (e.g., LTM handover latency with MAC CE signaling can reach 20ms). For PCell handover, the handover latency leads to reduced downlink throughput and decreased system efficiency. Furthermore, the scheduling of frequency domain units during PCell or SCell handover is inflexible.

[0224] To address the problems existing in the aforementioned cell handover methods, this application provides a communication method and apparatus to improve the flexibility of frequency domain unit scheduling in a communication system.

[0225] The communication method provided in this application can be applied to systems that communicate using multi-antenna technology, for example... Figure 1 The communication system shown may include at least one network device and at least one terminal device.

[0226] The communication method provided in this application embodiment can be applied to cellular communication networks, including communication links between base stations and UEs.

[0227] The communication method provided in this application can be applied to scenarios where uplink transmission capability and downlink reception capability are decoupled, or where uplink transmission capability is greater than downlink reception capability, or where downlink reception capability is limited, or where downlink reception capability is lower than downlink configuration, or where uplink bandwidth is high.

[0228] The embodiments shown below do not specifically limit the structure of the execution entity of the method provided in this application. As long as communication can be performed according to the method provided in this application by running a program that records the code of the method provided in this application. For example, the method provided in this application can be executed by a first communication device. Unless otherwise specified, "first communication device" in this application can refer to the first communication device itself (e.g., a terminal device), a component within the first communication device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the first communication device. As another example, the method provided in this application can be executed by a second communication device. Unless otherwise specified, "second communication device" in this application can refer to the second communication device itself (e.g., a network device), a component within the second communication device (e.g., a processor, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the second communication device.

[0229] Figure 5 This is a schematic flowchart of a communication method 500 provided in an embodiment of this application, including the following steps:

[0230] In some possible implementations, method 500 includes: S510, the first communication device and the second communication device determine the first frequency domain unit.

[0231] In this embodiment of the application, step S510 is an optional step.

[0232] It is understood that both the first communication device and the second communication device determine the first frequency domain unit before receiving the first control information on the first frequency domain unit. This application embodiment does not limit the order in which the first communication device and the second communication device determine the first frequency domain unit. The first communication device may determine the first frequency domain unit before the second communication device, the second communication device may determine the first frequency domain unit before the first communication device, or the first communication device and the second communication device may determine the first frequency domain unit simultaneously.

[0233] The method or process by which the first communication device or the second communication device determines the first frequency domain unit can refer to relevant technologies, and will not be elaborated here.

[0234] In some possible implementations, method 500 may also include: S520, the second communication device determines the first control information.

[0235] Wherein, the first control information instructs the frequency domain unit of the first communication device to receive control signals to switch from the first frequency domain unit to the second frequency domain unit, and / or, the first control information instructs the frequency domain unit of the first communication device to receive data signals to switch from the first frequency domain unit to the second frequency domain unit.

[0236] Control signals may include at least one of the following: PDCCH; downlink control information (DCI); reference signal (RS) measurement information; synchronization signal and PBCH block (SSB) measurement information; or synchronization information. Data signals may include PDSCH; or signals other than control signals transmitted / received between the first and second communication devices, such as signals used to carry service data such as video data, voice data, text data, or image data.

[0237] S530, the first communication device receives the first control information on the first frequency domain unit, and correspondingly, the second communication device sends the first control information on the first frequency domain unit.

[0238] In this embodiment, the frequency domain unit for receiving and / or transmitting signals scheduled by the base station can be a frequency domain resource that the base station can schedule in the communication system, or the smallest granularity of the frequency domain resource that the base station can schedule. For example, in an NR system, the smallest granularity of the frequency domain resource that the base station can schedule is a carrier unit (CC). In other or future communication systems, the smallest granularity of the frequency domain resource that the base station can schedule may or may not be CC. This embodiment does not limit this.

[0239] For ease of description, the following uses CC as the smallest granularity of frequency domain resources that a base station can schedule as an example to explain in detail the solution provided in the embodiments of this application.

[0240] In some possible implementations, method 500 may also include:

[0241] S540, the first communication device sends capability information, and the corresponding second communication device receives capability information. The capability information indicates that the first communication device supports a maximum number of carriers that can receive signals simultaneously, where m is an integer greater than 1.

[0242] Specifically, m is an integer greater than n+1, n is the number of third frequency domain units, n is an integer greater than 0, and one of the n third frequency domain units is used to receive other control information.

[0243] It is understood that the embodiments of this application do not limit the order of step S540 and the aforementioned steps (one or more of S510, S520 or S530). Step S540 is executed before the aforementioned steps (one or more of S510, S520 or S530), and the aforementioned steps (one or more of S510, S520 or S530) may be executed before step S540. Step S540 may also be executed after some of the aforementioned steps (one or two of S510, S520 or S530) has been executed.

[0244] For example, before the base station configures CC for the UE, the UE can send information indicating its own capabilities to the base station. For instance, the UE's capabilities may include the maximum number of concurrent carriers *m* that the UE can receive, and / or at least one carrier combination that the UE can support. When the UE reports at least one carrier combination that it can support, the base station can determine the maximum number of concurrent carriers supported by the UE based on that at least one carrier combination. Information about the UE's own capabilities can be considered one possible implementation of capability information.

[0245] In some possible implementations, method 500 may also include:

[0246] S550, the first communication device receives frequency domain unit configuration information, and correspondingly, the second communication device sends frequency domain unit configuration information. The frequency domain unit configuration information indicates multiple frequency domain units, and the frequency domain unit that receives the first control information and / or the frequency domain unit that receives the second control information belongs to multiple frequency domain units.

[0247] In this embodiment of the application, the frequency domain unit can be a frequency domain resource that the base station can schedule, such as: CC, carrier, cell, channel, resource block set, subband, bandwidth, BWP, etc.

[0248] For example, the base station can configure a combination of communication channels (CCs) for the UE that does not exceed its capabilities, based on information about the UE's own capabilities. Alternatively, the UE can select a CC from the combinations of CCs configured by the base station that falls within its own capabilities for communication.

[0249] S540 and S550 can be executed before S520.

[0250] For example, the X UL CCs and Y DL CCs configured by the base station for the UE are configured by the base station based on the UE's own capabilities.

[0251] For example, in CA technology, a UE is configured with X UL CCs and Y DL CCs (X is an integer greater than 1, and Y is an integer greater than 1).

[0252] Optional, Y is greater than or equal to X.

[0253] For ease of description, the following uses X=Y=4 as an example to explain in detail the solution provided by the embodiments of this application. It should be understood that X=Y=4 is only an exemplary illustration and does not constitute a limitation on the embodiments of this application. The embodiments of this application are also applicable to other values ​​of X and / or Y.

[0254] In CA technology, a base station can configure two or more CCs for a UE. The following describes in detail the possible implementation methods of the embodiments of this application, taking the base station configuring CC#0, CC#1, CC#2, and CC#3 for the UE as an example.

[0255] For ease of description, in the X UL CCs and Y DL CCs configured by the base station for the UE, a cell includes one UL CC and one DL CC, or a cell includes one DL CC. The CC of the UE's current PCell is denoted as CC#0, and the other CCs in the X UL CCs and Y DL CCs besides the CC of the UE's current PCell are denoted as CC#1, CC#2, and CC#3, respectively. For example, the uplink CC of the UE's current PCell is denoted as uplink CC#0, and the downlink CC of the UE's current PCell is denoted as downlink CC#0; the other uplink CCs besides uplink CC#0 are denoted as uplink CC#1, uplink CC#2, and uplink CC#3; and the other downlink CCs besides downlink CC#0 are denoted as downlink CC#1, downlink CC#2, and downlink CC#3. Uplink CC#0 and downlink CC#0 belong to the UE's PCC; uplink CC#1 and downlink CC#1 belong to the UE's SCC#1; uplink CC#2 and downlink CC#2 belong to the UE's SCC#2; uplink CC#3 and downlink CC#3 belong to the UE's SCC#3.

[0256] In the embodiments of this application, before blindly detecting the PDCCH, the UE may not distinguish whether the CC of the PDCCH to be blindly detected is the CC of the primary cell or the CC of the secondary cell. For example, the UE may blindly detect the PDCCH on every CC in the carrier combination configured for it by the base station; or, the UE may blindly detect the PDCCH on both the CC of the primary cell and the CC of the secondary cell in the carrier combination configured for it by the base station; or, the UE may select the CC of the PDCCH to be blindly detected from the carrier combination configured for it by the base station according to the UE's own capabilities.

[0257] After a UE performs a blind detection of the PDCCH, it may not need to perform a cell handover or a carrier unit handover.

[0258] For example, if a UE blindly detects the first control information, and the first control information does not instruct the UE to perform cell handover or carrier unit handover, the UE can maintain its relationship with the CC before receiving the first control information. As another example, if a UE blindly detects the first control information on a certain CC, and the first control information instructs the UE to receive the PDSCH, but does not instruct the UE to perform cell handover or carrier unit handover, the UE can receive its scheduled PDSCH on that particular CC based on the first control information.

[0259] In this embodiment of the application, the base station can configure two or more cells for the UE, or the base station can configure one cell for the UE.

[0260] For example, the base station only configures one cell for the UE, and this cell is used as the primary cell. The UE always performs blind detection of the PDCCH on the CC of the primary cell.

[0261] For example, if the UE performs a carrier unit handover according to the method provided in the embodiments of this application, only the CC of the received PDSCH of the primary cell is switched, and the CC of the blind detection PDCCH after the handover is still the CC of the primary cell.

[0262] For example, the base station configures two or more cells (including a primary cell and a secondary cell) for the UE. The UE always performs blind PDCCH detection on the CC of the primary cell, and the UE also performs blind PDCCH detection on the CC of at least one secondary cell.

[0263] For example, if the UE performs a carrier unit handover based on the control information on the CC of the primary cell according to the method provided in this application embodiment, only the CC of the primary cell's received PDSCH is switched, and the CC of the blind detection PDCCH after the handover is still the CC of the primary cell. When the UE performs a carrier unit handover based on the control information on the CC of the primary cell, for any one of the at least one secondary cell (i.e., a secondary cell with blind detection PDCCH), the following two cases can be further distinguished:

[0264] Case #1: The UE always performs blind PDCCH detection on the CC of the primary cell and the secondary cell with the same blind PDCCH detection.

[0265] For example, if the UE performs carrier unit handover based on the control information on the CC of the primary cell and the control information on the CC of the secondary cell of the blind-detection PDCCH according to the method provided in this application embodiment, then only the CC of the received PDSCH of the primary cell and the secondary cell is switched. That is, the CC of the two blind-detection PDCCH cells remains unchanged.

[0266] It is understandable that the statement that the CC of the two blind-detected PDCCH cells remains unchanged is merely an illustrative statement. If the UE blindly detects PDCCH on the CC of Q (Q is an integer greater than 2) cells, and the handover of the carrier element of the CC of the Q cells is only the handover of the CC of the receiving PDSCH, then the CC of the Q blind-detected PDCCH cells remains unchanged.

[0267] Case #2: The UE always performs blind detection of PDCCH on the CC of the primary cell, and can switch to other secondary cells outside the primary cell that perform blind detection of PDCCH.

[0268] For example, if the UE performs a carrier unit handover based on the control information on the CC of the primary cell according to the method provided in this application embodiment, the CC of the blind detection PDCCH of the secondary cell of the blind detection PDCCH can be switched. For example, the CC of the secondary cell used for the UE's blind detection PDCCH can be switched to another CC. That is, among the CCs of the two cells with blind detection PDCCHs, the CC of the secondary cell used for the UE's blind detection PDCCH changes.

[0269] The aforementioned handover of carrier units based on control information on the CC of the primary cell and the handover of carrier units based on control information on the CC of the secondary cell of the blind detection PDCCH can occur simultaneously or sequentially, and the embodiments of this application do not limit this.

[0270] Taking DCI as the first control information as an example, the UE can blindly detect the PDCCH on downlink CC#0. The PDCCH can serve as one possible implementation of the control signal. The base station can instruct the UE to perform carrier switching through the DCI carried by the PDCCH. After the UE successfully decodes the DCI based on the blindly detected PDCCH, it can perform carrier unit switching according to the DCI's instructions.

[0271] For example, the UE performs a blind detection of the PDCCH on CC#0:

[0272] In one possible scenario, the first control information instructs the frequency domain unit receiving data signals of the first communication device to switch from the first frequency domain unit to the second frequency domain unit. The UE can switch the CC receiving PDSCH from downlink CC#0 to downlink CC#1 (or downlink CC#2) according to the instruction of the DCI on downlink CC#0. Here, DCI on downlink CC#0 can be one possible implementation of the first control information, downlink CC#0 can be one possible implementation of the first frequency domain unit, downlink CC#1 (or downlink CC#2) can be one possible implementation of the second frequency domain unit, and PDSCH can be one possible implementation of the data signal.

[0273] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit when receiving data signals. Method 500 may further include:

[0274] S560a, the first communication device receives data signals in the second frequency domain unit, and correspondingly, the second communication device transmits data signals in the second frequency domain unit.

[0275] For example, after the UE performs a carrier handover according to the DCI's instructions, the CC of the blind detection PDCCH remains unchanged, but the CC of the received PDSCH changes. The UE is switched from receiving PDSCH from CC#0 to receiving PDSCH from CC#1 (or CC#2). After the carrier handover is complete, the UE no longer receives PDSCH from CC#0, and the UE can schedule PDSCH on CC#1 (or CC#2).

[0276] In some possible implementations, the control signal includes at least one of the following: DCI; RS measurement information; SSB measurement information; or, synchronization information.

[0277] For example, the UE can always detect control signals on the PCell, and the CC of the control signal detected by the UE and the CC of the received PDSCH are determined independently. The UE's detection of control signals may include: blind detection of PDCCH, measurement of RS, measurement of SSB, synchronization, etc. The control signals may include control information (e.g., the control signals may include any one of first control information, second control information, or third control information).

[0278] In another possible scenario, the first control information instructs the frequency domain unit receiving the control signal of the first communication device to switch from the first frequency domain unit to the second frequency domain unit. The UE can switch the CC of the blind detection PDCCH from downlink CC#0 to downlink CC#1 (or downlink CC#2) according to the instruction of the DCI on downlink CC#0. Here, DCI on downlink CC#0 can be one possible implementation of the first control information, downlink CC#0 can be one possible implementation of the first frequency domain unit, downlink CC#1 (or downlink CC#2) can be one possible implementation of the second frequency domain unit, and PDCCH can be one possible implementation of the control signal.

[0279] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit when receiving the control signal. Method 500 may further include:

[0280] S560b, the first communication device receives control signals on the second frequency domain unit, and correspondingly, the second communication device sends control signals on the second frequency domain unit.

[0281] For example, after the UE performs a carrier handover according to the DCI's instructions, the CC of the blind detection PDCCH changes. After the carrier handover is completed, the UE no longer performs blind detection of the PDCCH from CC#0, and the UE can schedule the PDCCH on CC#1 (or CC#2).

[0282] In some possible implementations, the first control information instructs the frequency domain unit where the first communication device receives the control signal to switch from the first frequency domain unit to the second frequency domain unit. Receiving the first control information on the first frequency domain unit includes: the first communication device receiving the first control information sent by the second communication device on the first frequency domain unit at time T1; method 500 may further include: the first communication device receiving the control signal sent by the second communication device on the second frequency domain unit at time T2, wherein the time interval between time T1 and time T2 satisfies an interval time, the interval time including: the sum of the radio frequency (RF) reset time and the baseband (BB) reset time; or, the BB reset time.

[0283] For example, the time interval between the UE receiving the first control information and the UE completing the handover of the frequency domain unit for receiving control signals, and the UE first receiving control signals and / or data signals on the handover frequency domain unit, satisfies the interval time. During the interval time, the UE cannot communicate with the primary cell. The interval time may include the sum of the RF retuning time and the BB retuning time; or, when the RF is pre-configured, the interval time may include the BB retuning time.

[0284] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device receiving control signals to switch from a first frequency domain unit to a second frequency domain unit. The first control information also instructs the frequency domain unit receiving data signals to switch from a first frequency domain unit to a fifth frequency domain unit.

[0285] For example, the first control information instructs the frequency domain unit of the first communication device receiving control signals to switch from a first frequency domain unit to a second frequency domain unit. The first control information may also instruct the switching of the frequency domain unit receiving data signals. The fifth frequency domain unit may be indicated by the first control information.

[0286] For example, the UE can receive PDSCH on the CC of the blind detection PDCCH (e.g., if the UE switches the CC of the blind detection PDCCH from CC#0 to CC#1, the UE can receive PDSCH on CC#1); or, the CCs for receiving control signals and data signals can be decoupled, that is, the UE can receive PDSCH on other CCs besides the CC of the blind detection PDCCH, and the other CCs are indicated by the DCI received by the UE from CC#0 (e.g., if the UE switches the CC of the blind detection PDCCH from CC#0 to CC#1, the UE can receive PDSCH on CC#2, and CC#2 can be a possible implementation of the fifth frequency domain unit).

[0287] In some possible implementations, the first control information includes a first indication field, which is used to instruct the frequency domain unit of the first communication device receiving control signals to switch from a first frequency domain unit to a second frequency domain unit, and / or, the first indication field is used to instruct the frequency domain unit of the first communication device receiving data signals to switch from a first frequency domain unit to a second frequency domain unit.

[0288] For example, the DCI may include field #1, which may include Z bits, where Z is an integer greater than 0. These Z bits of the DCI on CC#0 are used to instruct the UE to switch the CC for receiving control signals (or data signals) from CC#0 to CC#1. Field #1 may be one possible implementation of a first indication field, CC#0 may be one possible implementation of a first frequency domain unit, and CC#2 may be one possible implementation of a second frequency domain unit. For example, in the DCI, log2 CC... num One bit is used to indicate the CC of the UE to switch to receive control signals (or data signals).

[0289] For example, when the UE establishes an initial connection with the PCell, it receives RRC signaling. The RRC signaling instructs another cell to detect control information. The UE maintains detection of the PDCCH within both the PCell and the cell containing this other detection control information. The UE performs blind detection of the PDCCH on CC#0 and CC#1:

[0290] In some possible implementations, the method further includes: receiving second control information in one of n third frequency domain units, where n is an integer greater than 0; the second control information instructing the frequency domain unit of the first communication device receiving control signals to switch from the third frequency domain unit receiving the second control information to a fourth frequency domain unit; and / or, the second control information instructing the frequency domain unit of the first communication device receiving data signals to switch from the third frequency domain unit receiving the second control information to a fourth frequency domain unit.

[0291] Specifically, the UE blindly detects multiple DCIs on multiple CCs. One or more of the multiple DCIs can instruct the UE to switch the frequency domain unit for receiving control signals and / or switch the frequency domain unit for receiving data signals.

[0292] In one possible scenario, the UE can switch the receiving CC of PDSCH from downlink CC#0 to downlink CC#2 according to the DCI instruction on downlink CC#0; and the UE can switch the receiving CC of PDSCH from downlink CC#1 to downlink CC#3 according to the DCI instruction on downlink CC#1.

[0293] For example, after the UE performs a carrier handover according to the DCI's instructions, the CC of the blind detection PDCCH remains unchanged, but the CC of the received PDSCH changes. Instead of receiving PDSCH from CC#0 and CC#1, the UE now receives PDSCH from CC#2 and CC#3, and simultaneously receives PDCCH from CC#0 and CC#1. After the carrier handover is complete, the UE no longer receives PDSCH from CC#0 and CC#1, and can schedule PDSCH on CC#2 and CC#3.

[0294] In another possible scenario, the UE can switch the CC of the blind detection PDCCH from downlink CC#0 to downlink CC#2 according to the DCI instruction on downlink CC#0; or, the UE can switch the CC of the blind detection PDCCH from downlink CC#1 to downlink CC#3 according to the DCI instruction on downlink CC#1.

[0295] For example, after the UE performs a carrier handover according to the DCI's instructions, the CC of the blind detection PDCCH changes. After the carrier handover is completed, the UE no longer performs blind detection of the PDCCH from CC#0 and CC#1, and the UE can schedule the PDCCH on CC#2 and CC#3.

[0296] In the two possible scenarios described above, DCI on downlink CC#0 can be a possible implementation of the first control information, DCI on downlink CC#1 can be a possible implementation of the second control information, downlink CC#0 can be a possible implementation of the first frequency domain unit, downlink CC#1 can be a possible implementation of one of the n third frequency domain units, downlink CC#2 can be a possible implementation of the second frequency domain unit, and downlink CC#3 can be a possible implementation of the fourth frequency domain unit.

[0297] In some possible implementations, the first control information includes a first indication field, which is used to instruct the frequency domain unit of the first communication device receiving control signals to switch from a first frequency domain unit to a second frequency domain unit, and / or, the first indication field is used to instruct the frequency domain unit of the first communication device receiving data signals to switch from a first frequency domain unit to a second frequency domain unit; the second control information includes a second indication field, which is used to instruct the frequency domain unit of the first communication device receiving control signals to switch from a third frequency domain unit to a fourth frequency domain unit, and / or, the second indication field is used to instruct the frequency domain unit of the first communication device receiving data signals to switch from a third frequency domain unit to a fourth frequency domain unit.

[0298] For example, in the two possible scenarios described above, the DCI on CC#0 includes field #1, and the DCI on CC#1 includes field #2. Fields #1 and #2 each include Z bits, where Z is an integer greater than 0. These Z bits of the DCI on CC#0 are used to instruct the UE to switch the CC for receiving control signals (or data signals) from CC#0 to CC#2, and these Z bits of the DCI on CC#1 are used to instruct the UE to switch the CC for receiving control signals (or data signals) from CC#1 to CC#3. Field #1 can be a possible implementation of a first indication field, CC#0 can be a possible implementation of a first frequency domain unit, CC#2 can be a possible implementation of a second frequency domain unit, field #2 can be a possible implementation of a second indication field, CC#1 can be a possible implementation of a third frequency domain unit, and CC#3 can be a possible implementation of a fourth frequency domain unit. For example, in the DCI, log2 CC... num One bit is used to indicate the CC of the UE to switch to receive control signals (or data signals).

[0299] For example, the formats of the first indication field and the second indication field may be the same or different, but the type of carrier switching indicated by the first indication field and the second indication field is the same. For example, the formats of the first control information and the second control information may be the same or different, wherein the first indication field and the second indication field may both indicate switching of the CC of the receive control signal; or, the first indication field and the second indication field may both indicate switching of the CC of the receive data signal.

[0300] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device to receive data signals to switch from a first frequency domain unit to a second frequency domain unit, and the second control information instructs the frequency domain unit of the first communication device to receive control signals to switch from a third frequency domain unit to a fourth frequency domain unit.

[0301] In one possible scenario, the UE can switch the receiving CC of the PDSCH from downlink CC#0 to downlink CC#2 according to the DCI instruction on downlink CC#0; and the UE can switch the receiving CC of the blind detection PDCCH from downlink CC#1 to downlink CC#3 according to the DCI instruction on downlink CC#1.

[0302] In some possible implementations, the first control information instructs the frequency domain unit of the first communication device receiving control signals to switch from a first frequency domain unit to a second frequency domain unit, and the second control information instructs the frequency domain unit of the first communication device receiving data signals to switch from a third frequency domain unit to a fourth frequency domain unit.

[0303] In another possible scenario, the UE can switch the CC of the blind detection PDCCH from downlink CC#0 to downlink CC#2 according to the DCI instruction on downlink CC#0; or, the UE can switch the CC of the received PDSCH from downlink CC#1 to downlink CC#3 according to the DCI instruction on downlink CC#1.

[0304] In some other possible implementations, the first control information includes a first indication field and a second indication field, the second control information includes a first indication field and a second indication field, the first indication field is used to instruct the frequency domain unit of the first communication device receiving control signals to switch from a first frequency domain unit to a second frequency domain unit, and / or, the second indication field is used to instruct the frequency domain unit of the first communication device receiving data signals to switch from a third frequency domain unit to a fourth frequency domain unit.

[0305] For example, the first indication field includes a first field, the second indication field includes a second field, the first field includes Z bits, the second field includes Z' bits, Z is an integer greater than 0, Z' is an integer greater than 0, the Z bits are used to indicate that the frequency domain unit of the first communication device receiving control signals switches from the first frequency domain unit to the second frequency domain unit, and / or, the Z' bits are used to indicate that the frequency domain unit of the first communication device receiving data signals switches from the third frequency domain unit to the fourth frequency domain unit.

[0306] For example, the first indication field of the first control information indicates that the frequency domain unit of the first communication device receiving control signals switches from the first frequency domain unit to the second frequency domain unit, and the second indication field of the second control information indicates that the frequency domain unit of the first communication device receiving data signals switches from the third frequency domain unit to the fourth frequency domain unit.

[0307] For example, the format of the first indication field and the second indication field or their position in the control information may be different, and the type of carrier switching indicated by the first indication field and the second indication field may be different.

[0308] For example, the UE performs blind detection of the PDCCH on CC#0 and CC#1. The DCI can include two formats: format #1 and format #2. The format #1 DCI on CC#0 is used to instruct the UE to switch the CC for receiving control signals from CC#0 to CC#2, and / or, the format #2 DCI on CC#1 is used to instruct the UE to switch the CC for receiving data signals from CC#1 to CC#3.

[0309] In the above possible scenarios, downlink CC#0 with DCI can be a possible implementation of the first control information, downlink CC#1 with DCI can be a possible implementation of the second control information, downlink CC#0 can be a possible implementation of the first frequency domain unit, downlink CC#1 can be a possible implementation of one of the n third frequency domain units, downlink CC#2 can be a possible implementation of the second frequency domain unit, and downlink CC#3 can be a possible implementation of the fourth frequency domain unit.

[0310] It is understood that, for ease of description, this embodiment only illustrates receiving the second control information on one of the n third frequency domain units, and the number of frequency domain units receiving the second control information does not limit the embodiment. The UE can receive the second control information for indicative of a switching reception control signal (or data signal) on one or all of the n third frequency domain units. The UE can receive the second control information for indicative of a switching reception control signal (or data signal) on any one of the n third frequency domain units, and the relevant scheme for switching frequency domain units can be referred to the description of the UE receiving the first control information on the first frequency domain unit, which will not be repeated here.

[0311] It is understood that the second frequency domain unit and the fourth frequency domain unit mentioned above may be the same frequency domain unit or different frequency domain units. Unless otherwise specified, this does not constitute a limitation on the embodiments of this application.

[0312] In some possible implementations, the method further includes: receiving additional control information on one of the n third frequency domain units, where n is an integer greater than 0; the additional control information does not instruct the first communication device to switch the frequency domain unit for receiving control signals from one third frequency domain unit to a fourth frequency domain unit; and / or, the additional control information does not instruct the first communication device to switch the frequency domain unit for receiving data signals from one third frequency domain unit to a fourth frequency domain unit. The first communication device can receive control signals and data signals scheduled by the additional control information on one of the n third frequency domain units.

[0313] Specifically, the UE blindly detects multiple DCIs on multiple CCs. One of the multiple DCIs can instruct the UE to switch the CC for receiving control signals and / or the CC for receiving data signals. Other DCIs can instruct the UE to receive control signals and / or data signals, but do not instruct the UE to switch the CC for receiving control signals and / or the CC for receiving data signals.

[0314] In any of the above possible implementations or scenarios, after the UE receives the carrier handover indicated by the DCI, it can switch the carrier for receiving service data (e.g., data signals) and / or control signaling (e.g., control signals). The UE performing carrier handover according to the DCI indication improves the scheduling flexibility of frequency domain units in the communication system. Furthermore, the carrier handover performed by the UE according to the DCI indication does not involve PCell handover; the DCI-indicated carrier handover can avoid handover delay caused by PCell handover while scheduling CC, thereby improving downlink throughput and system efficiency.

[0315] In any of the above possible implementations or scenarios, among the X UL CCs and Y DL CCs, before the UE obtains the DCI via blind detection PDCCH and the DCI indicates a carrier handover, the primary carrier is active among the CCs configured for the UE, and one or more CCs other than the primary carrier may be active (or inactive). For example, CC#0 is active, and one or more of CC#1, CC#2, or CC#3 may be active (or inactive). The DCI indicates a handover of the carrier for receiving signals from CC#0 to CC#1. Compared to CC#1 being inactive, having CC#1 active saves time in the handover process.

[0316] It should be understood that CC#2 being active compared to being inactive, or CC#3 being active compared to being inactive, is similar to CC#1 mentioned above, and will not be elaborated further.

[0317] In this embodiment, the CC in the active state has completed uplink and downlink synchronization, and the UE can directly receive signals through the CC in the active state; if the CC is not in the active state, the UE needs to complete the uplink and downlink synchronization of the CC before receiving signals through the CC in the inactive state, and then receive signals through the CC that has completed uplink and downlink synchronization.

[0318] The above text combined Figure 5 This application provides a detailed description of a communication method 500 for carrier switching, as provided in an embodiment. The following will be combined with... Figure 6 This application provides a detailed description of a communication method 600 that can be used for cell handover, as provided in an embodiment.

[0319] Figure 6 This is a schematic flowchart of a communication method 600 provided in an embodiment of this application, including the following steps:

[0320] S610, the first communication device receives configuration information, and correspondingly, the second communication device sends configuration information.

[0321] S620, the first communication device receives the third control information, and correspondingly, the second communication device sends the third control information, which instructs the first communication device to switch from the first cell to the second cell.

[0322] Specifically, the base station sends configuration information to the UE, the parameter set in which the configuration information is used for the UE to receive data signals, and / or, the parameter set in the configuration information is used for the UE to receive both data signals and control signals.

[0323] In some possible implementations, the second cell is in an active state before receiving third control information.

[0324] Specifically, before the UE executes the cell handover indicated by the third control information, the second cell is in an active state. Compared with the second cell being in a deactivated state, this can save the time of completing the activation of the second cell during handover, and further reduce the latency of cell handover.

[0325] The following describes several possible implementations of method 600 in cases #1, #2 and #3 respectively.

[0326] Scenario #1: The configuration information includes a first set of parameters and a second set of parameters.

[0327] Method 600 may also include:

[0328] S630a, in one scenario, the second cell is the primary cell. The first communication device receives control signals and data signals in the second cell using a first parameter set. Correspondingly, the second communication device transmits control signals and data signals in the second cell using the first parameter set. That is, the parameter set of the second cell as the primary cell is the first parameter set. Alternatively,

[0329] In S630c, under another scenario, the second cell is a secondary cell. The first communication device uses a second parameter set to receive data signals on the second cell, and correspondingly, the second communication device uses the second parameter set to transmit data signals on the second cell. That is, the parameter set for the second cell as a secondary cell is the second parameter set.

[0330] Specifically, the set of parameters in the configuration information sent by the base station to the UE includes both the first set of parameters used to receive control signals and data signals when the second cell is the primary cell after cell handover, and the second set of parameters used to receive data signals when the second cell is the secondary cell after cell handover.

[0331] That is, the second cell is configured with two sets of parameters, including a first set of parameters and a second set of parameters. The first set of parameters is the set of parameters configured for the second cell as the primary cell, and the second set of parameters is the set of parameters configured for the second cell as the secondary cell.

[0332] In this embodiment, the secondary cell does not establish an RRC connection with the first communication device, but the first communication device can receive the PDCCH through self-scheduling or other methods. For example, in one case, the second cell is the secondary cell, and the first communication device uses a second parameter set to receive control signals and data signals on the second cell; correspondingly, the second communication device uses the second parameter set to transmit control signals and data signals on the second cell, where the control signals may include the PDCCH and the data signals may include the PDSCH. Other possible implementations of this embodiment are also applicable and will not be elaborated further.

[0333] In some possible implementations, the second cell is the primary cell, and the first parameter set is used to receive control signals and data signals on the second cell. The values ​​of the first parameter set are the same when the second cell and other cells perform carrier aggregation.

[0334] That is, the set of parameters configured for the second cell as the primary cell applies to any carrier combination including the second cell.

[0335] Specifically, when the second cell performs carrier aggregation with different cells, the second cell always acts as the primary cell after the cell handover, and the value of any parameter in the first parameter set configured for it by the base station is the same. Alternatively, it can be understood that the second cell is configured with the first parameter set only once. This first parameter set applies to the case where the second cell acts as the primary cell in any carrier combination.

[0336] For example, in the first parameter set, any one of the following: radio link monitoring (RLM) configuration information, synchronization reconfiguration information, cell index information, cell common configuration information, cell dedicated configuration information, or synchronization signal block measurement timing configuration (SMTC) information, when carrier aggregation is performed between the second cell and different cells, has the same value or the parameter configuration used is the configuration of the first parameter set.

[0337] In some possible implementations, the second cell is a secondary cell, and the second parameter set is used to receive data signals on the second cell. The values ​​of the second parameter set are the same when the second cell and other cells are carrier aggregated.

[0338] That is, the set of parameters configured for the second cell as a secondary cell, applicable to any carrier combination including the second cell.

[0339] Specifically, when the second cell performs carrier aggregation with different cells, the second cell always acts as a secondary cell after cell handover, and the value of any parameter in the second parameter set configured for it by the base station is the same. Alternatively, it can be understood that the second cell is configured with the second parameter set only once. This second parameter set applies to the case where the second cell acts as a secondary cell in any carrier combination.

[0340] For example, in the second parameter set, any one of the cell index information, cell common configuration information, cell dedicated configuration information, or SMTC information has the same value or the parameter configuration used is the configuration of this second parameter set when carrier aggregation is performed between the second cell and different cells.

[0341] In some possible implementations, the first parameter set includes at least one of the following: Radio Link Monitoring (RLM) configuration information, Synchronization Reconfiguration information, Cell Index information, Cell Common Configuration information, Cell Dedicated Configuration information, or Synchronization Signal Block Measurement Timing Configuration (SMTC) information; the second parameter set includes at least one of the following: Cell Index information, Cell Common Configuration information, Cell Dedicated Configuration information, or SMTC information.

[0342] Optionally, the first parameter set includes: RLM configuration information, synchronization reconfiguration information, cell index information, cell common configuration information, cell dedicated configuration information, or synchronization signal block measurement timing configuration (SMTC) information; the second parameter set includes: cell index information, cell common configuration information, cell dedicated configuration information, or SMTC information.

[0343] Scenario #2: The configuration information includes a first set of parameters and a second set of parameters.

[0344] Method 600 may also include:

[0345] In S630b, under one condition, the second cell is the primary cell. The first communication device receives control signals and data signals in the second cell using a first parameter set and a second parameter set. Correspondingly, the second communication device transmits control signals and data signals in the second cell using the first parameter set and the second parameter set. Alternatively,

[0346] S630c, in one case, the second cell is a secondary cell, the first communication device uses the second parameter set to receive data signals on the second cell, and correspondingly, the second communication device uses the second parameter set to transmit data signals on the second cell.

[0347] The first communication device uses a first parameter set and a second parameter set to receive control signals and data signals on the second cell. This can be understood as the UE using the first parameter set configured as the primary cell and the second parameter set configured as the secondary cell to receive control signals and data signals on the second cell.

[0348] The first communication device uses the second set of parameters to receive data signals on the second cell. This can be understood as the UE using the second cell as the secondary cell and the second set of parameters configured to receive data signals on the second cell.

[0349] That is, the first parameter set is the set of parameters that are configured or applied when a cell is the primary cell.

[0350] The second parameter set is the set of parameters that are configured or applied when a cell is used as a secondary cell.

[0351] In other words, the set of parameters configured or applied when a cell is a primary cell includes a first set of parameters and a second set of parameters. The set of parameters configured or applied when a cell is a secondary cell includes a second set of parameters.

[0352] Specifically, the parameter set in the configuration information sent by the base station to the UE includes both the first parameter set and the second parameter set used for receiving control signals and data signals when the second cell is the primary cell after cell handover, and the second parameter set used for receiving data signals when the second cell is the secondary cell after cell handover.

[0353] In some possible implementations, the second cell is the primary cell, and control signals and data signals are received on the second cell using a first parameter set and a second parameter set. The values ​​of the first parameter set are the same when the second cell aggregates carriers with other cells, and the values ​​of the second parameter set are the same when the second cell aggregates carriers with other cells.

[0354] In other words, in different carrier aggregations, the second cell can be configured as a primary cell using only the first and second parameter sets (with the same category and values), or as a secondary cell using only the second parameter set (with the same category and values). Alternatively, the second cell can be independently configured in different carrier aggregations as a primary cell using both the first and second parameter sets (with the same category and values), or as a secondary cell using the second parameter set (with the same category and values).

[0355] Specifically, when the second cell performs carrier aggregation with different cells, it always acts as the primary cell after the cell handover. The base station configures the same values ​​for all parameters in the first parameter set and the same values ​​for all parameters in the second parameter set. Alternatively, it can be understood that the second cell is configured with only one set of parameters and one set of parameters. These sets apply to the second cell acting as the primary cell in any carrier combination.

[0356] For example, in the first parameter set, any item in the RLM configuration information or synchronization reconfiguration information has the same value or uses the same parameter configuration when the second cell performs carrier aggregation with different cells.

[0357] In some possible implementations, the second cell is a secondary cell, and the second parameter set is used to receive data signals on the second cell. The values ​​of the second parameter set are the same when the second cell and other cells are carrier aggregated.

[0358] That is, the set of parameters configured for the second cell as a secondary cell, applicable to any carrier combination including the second cell.

[0359] Specifically, when the second cell performs carrier aggregation with different cells, the second cell always acts as a secondary cell after cell handover, and the value of any parameter in the second parameter set configured for it by the base station is the same. Alternatively, it can be understood that the second cell is configured with the second parameter set only once. This second parameter set applies to the case where the second cell acts as a secondary cell in any carrier combination.

[0360] For example, in the second parameter set, any one of the cell index information, cell common configuration information, cell dedicated configuration information, or SMTC information has the same value or the parameter configuration used is the configuration of this second parameter set when carrier aggregation is performed between the second cell and different cells.

[0361] In some possible implementations, the first parameter set includes at least one of the following: RLM configuration information or synchronization reconfiguration information; the second parameter set includes at least one of the following: cell index information, cell common configuration information, cell private configuration information or SMTC information.

[0362] Optionally, the first set of parameters includes: Radio Link Monitoring (RLM) configuration information and Synchronization Reconfiguration information; the second set of parameters includes: Cell Index Information, Cell Common Configuration Information, Cell Private Configuration Information, or SMTC Information.

[0363] In some possible implementations, the first parameter set is the same when different cells serve as the primary cell after a cell handover.

[0364] Specifically, when different cells are used as secondary cells, the type and value of any parameter in the first parameter set configured by the base station are the same. Alternatively, it can be understood that the base station configures the first parameter set only once, and this first parameter set applies to any cell acting as the primary cell in any carrier combination.

[0365] For example, the first set of parameters configured by the base station for cell #1 and cell #2 has the same type and value. The first set of parameters includes at least one of the following: RLM configuration information or synchronization reconfiguration information.

[0366] Scenario #3: The configuration information includes a third parameter set, and the first communication device uses the third parameter set to receive data signals in different cells.

[0367] Method 600 may also include:

[0368] In S630d, under one condition, the second cell is the primary cell. The first communication device receives control signals and data signals on the second cell using a third parameter set. Correspondingly, the second communication device transmits control signals and data signals on the second cell using the third parameter set. That is, the parameter set for the second cell as the primary cell is the third parameter set. Alternatively,

[0369] S630e, in one scenario, the second cell is a secondary cell, and the first communication device uses a third parameter set to receive data signals on the second cell. Correspondingly, the second communication device uses the third parameter set to transmit data signals on the second cell. That is, the parameter set for the second cell as a secondary cell is the third parameter set.

[0370] Specifically, the third set of parameters in the configuration information sent by the base station to the UE can be used to receive control signals and data signals when the second cell is the primary cell after cell handover, and can also be used to receive data signals when the second cell is the secondary cell after cell handover.

[0371] That is, the second cell is configured with a set of parameters, which includes a third set of parameters. The third set of parameters can be the set of parameters configured for the second cell as the primary cell, or the set of parameters configured for the second cell as the secondary cell.

[0372] In some possible implementations, the first communication device uses a third parameter set to receive control signals and data signals in different cells, including: the parameters in the third parameter set used by the first communication device in different cells are of the same type; the values ​​of the parameters in the third parameter set used by the first communication device in different cells are the same or different.

[0373] For example, in the third parameter set, the values ​​for cell index information, cell public configuration information, cell dedicated configuration information, or SMTC information are different for different cells.

[0374] In some possible implementations, the values ​​of the third parameter set are the same for the second cell and other cells when carrier aggregation is performed, or the parameter configurations used are all configurations of the third parameter set.

[0375] That is, the category of parameters in the parameter set configured for the second cell as a secondary / primary cell, applicable to any carrier combination including the second cell.

[0376] Specifically, when the second cell performs carrier aggregation with different cells, regardless of whether the second cell is the secondary cell or the primary cell after cell handover, the value of any parameter in the third parameter set configured by the base station for it is the same.

[0377] In some possible implementations, the third parameter set includes at least one of the following: RLM configuration information or synchronization reconfiguration information, cell index information, cell common configuration information, cell private configuration information, or SMTC information.

[0378] Optionally, the third parameter set includes: Radio Link Monitoring (RLM) configuration information, Synchronization Reconfiguration (SRRM) information, Cell Index Information, Cell Common Configuration Information, Cell Private Configuration Information, or SMTC Information.

[0379] For example, in CA technology, the UE is already connected to the PCell, and all the CCs configured for the UE are active.

[0380] It should be understood that in the embodiments of this application, if the CC configured for the UE is in a deactivated state before handover, the CC needs to be activated before handover to the cell. The following example only assumes that all CCs configured for the UE are in an activated state, and unless otherwise specified, it does not limit the embodiments of this application.

[0381] For ease of description, the current PCell CC of the UE is denoted as CC#0, and the CCs configured for the UE other than the primary carrier are denoted as CC#1, CC#2, and CC#3, respectively. CC#0, CC#1, CC#2, and CC#3 can be used as combinations of CCs configured by the base station for the UE. The UE can receive cell parameters configured by the base station for different cells in the CC combinations via RRC reconfiguration signaling. The UE can store the parameters contained in the RRC reconfiguration signaling and send an RRC reconfiguration completion signaling to the base station. After the UE successfully decodes the DCI according to the blind detection PDCCH, it can perform cell handover according to the DCI indication. This DCI can be used as a possible implementation of third control information.

[0382] For example, the base station sends two sets of parameters configured for each cell via RRC reconfiguration signaling: parameter #1 and parameter #2. Parameter #1 for each cell includes the parameters applied when the cell is the PCell of the UE, and parameter #2 for each cell includes the parameters applied when the cell is the SCell of the UE.

[0383] Taking CC#0, CC#1, CC#2 and CC#3 as a combination of CCs configured by the base station for the UE as an example, the cell parameters of different cells in this combination of CCs can be found in Table 1.

[0384] Table 1

[0385]

[0386] Taking CC#0 as an example, two sets of parameters (configuration A' and configuration A) are configured for CC#0. Configuration A' is the parameter configuration for CC#0 as the CC of the PCell when using combination #1, and configuration A is the parameter configuration for CC#0 as the CC of the SCell when using combination #2, combination #3, or combination #4. When CC#0 is the CC of the PCell, configuration A' is activated; when CC#0 is the CC of the SCell, configuration A' is deactivated, and configuration A is activated. Configuration A' is one possible implementation of parameter #1 for CC#0, and configuration A is one possible implementation of parameter #2 for CC#0.

[0387] It should be understood that the parameter configurations for CC#1, CC#2, or CC#3 are similar to those for CC#0, and will not be repeated here.

[0388] In one possible scenario:

[0389] Parameter #1 for each cell may include at least one of the following (in this case, the parameter set consisting of parameter #1 for each cell can be a possible implementation of the first parameter set in case #1):

[0390] ①RLM-related configurations. For example, timers for RLM failure detection; RLM synchronization (IS) / out-of-sync (OOS) thresholds, etc.

[0391] ② Synchronous reconfiguration, such as new radio network temporary identity (RNTI); T304 timer; and configuration related to the random access channel (RACH).

[0392] ③ Cell index.

[0393] ④ Community public configuration and community-specific configuration (different communities use the same message element (IE) for configuration, and the categories of parameters in the community-specific configuration of different communities are the same).

[0394] ⑤SMTC.

[0395] Parameter #2 for each cell may include at least one of the following (in this case, the parameter set consisting of parameter #2 for each cell can be a possible implementation of the second parameter set in case #1):

[0396] ① Cell index.

[0397] ②Community public configuration and community-specific configuration (different communities use the same IE configuration, and there is no difference in parameter categories).

[0398] ③SMTC.

[0399] In another possible scenario:

[0400] All cell parameters #1 can include at least one of the following (in this case, the parameter set consisting of parameters #1 of each cell can be a possible implementation of the first parameter set in case #2):

[0401] ①RLM-related configurations. For example, timers for RLM failure detection; RLM IS / OOS thresholds, etc.

[0402] ② Synchronous reconfiguration, such as new RNTI; T304 timer; RACH related configurations, etc.

[0403] Parameter #2 for each cell may include at least one of the following (in this case, the parameter set consisting of parameter #2 for each cell can be a possible implementation of the second parameter set in case #2):

[0404] ① Cell index.

[0405] ②Community public configuration and community-specific configuration (different communities use the same IE configuration, and there is no difference in parameter categories).

[0406] ③SMTC.

[0407] Furthermore, in this case, the parameters for different cells as PCells can be default. For example, parameter #1 is the same for CC#0, CC#1, CC#2, and CC#3. In this case, parameter #1 is not associated with CC, but is the default value.

[0408] When different cells are configured as PCells with the same parameters (default values), the signaling overhead of the base station configuring cell parameters for the UE is smaller compared to different cells being configured as PCells with different parameters.

[0409] When a cell is used as a PCell, it can use parameters #1 and #2; when a cell is used as an SCell, it can use parameter #2.

[0410] For example, the base station sends a set of parameters configured for each cell via RRC reconfiguration signaling: parameter #3. Parameter #3 for each cell includes the parameters applied when that cell is used as a PCell or SCell of the UE.

[0411] In one possible scenario, parameter #3 for all cells can include at least one of the following (in this case, the parameter set consisting of parameter #3 for each cell can be considered as a possible implementation of the third parameter set in scenario #3):

[0412] ①RLM-related configurations. For example, timers for RLM failure detection; RLM IS / OOS thresholds, etc.

[0413] ② Synchronous reconfiguration, such as new RNTI; T304 timer; RACH related configurations, etc.

[0414] ③ Cell index.

[0415] ④ Community public configuration and community-specific configuration (different communities use the same IE configuration, and the categories of parameters in the community-specific configuration of different communities are the same).

[0416] ⑤SMTC.

[0417] In this scenario, when the cell acts as a PCell, it can use parameters ① to ⑤ of #3; when the cell acts as an SCell, it can use parameters ③ to ⑤ of #3. The base station configures only one set of parameters for each cell, which can be used for both primary and secondary cells. When the UE performs cell handover, regardless of whether the cell to be handed over to is a primary or secondary cell, the same parameters can be configured for that cell. This simplifies the cell handover process.

[0418] In the above possible scenarios, when each cell acts as a PCell and implements CA with other cells, its parameter #1 can be exactly the same or different; when each cell acts as an SCell and implements CA with other cells, its parameter #2 can be exactly the same or different. For example, when cell #1 acts as a PCell and cell #2 acts as an SCell, the parameter #1 of cell #1 can be exactly the same (or different) than the parameter #1 when cell #3 acts as an SCell and cell #1 acts as a PCell; when cell #1 acts as an SCell and cell #2 acts as a PCell, the parameter #2 of cell #1 can be exactly the same (or different) than the parameter #2 when cell #3 acts as a PCell and cell #1 acts as an SCell.

[0419] When each cell acts as a PCell and implements CA with other cells, if its parameter #1 is exactly the same, the signaling overhead of the base station configuring the cell parameters for the UE is smaller compared to when its parameter #1 is not exactly the same; when each cell acts as a PCell and implements CA with other cells, if some of its parameter #1 is the same, the signaling overhead of the base station configuring the cell parameters for the UE is smaller compared to when its parameter #1 is completely different.

[0420] When each cell acts as an SCell and implements CA with other cells, if its parameter #2 is exactly the same, the signaling overhead of the base station configuring the cell parameters for the UE is smaller compared to when its parameter #2 is not exactly the same; when each cell acts as an SCell and implements CA with other cells, if some of its parameter #2 is the same, the signaling overhead of the base station configuring the cell parameters for the UE is smaller compared to when its parameter #2 is completely different.

[0421] In the aforementioned possible scenarios, once a UE already connected to a PCell receives a cell handover indication from the DCI, it can directly perform the cell handover based on the stored parameters. Compared to reactivating the CC during handover and reconfiguring its parameters based on the CC's role change (e.g., reconfiguring the parameters for the cell about to become a PCell to meet the functional requirements of the primary cell, and reconfiguring the parameters for the cell about to become a SCell to meet the functional requirements of the secondary cell), since the UE's SCell CCs are all active and the parameters for the CCs as different cell roles are pre-stored, cell handover in this case does not require uplink / downlink synchronization, L1 measurement, or parameter changes, simplifying the handover process and shortening the handover latency.

[0422] The following is combined with Figure 7 This section describes in detail the process by which the UE performs cell handover under the aforementioned possible scenarios. Figure 7 This is a schematic flowchart of a communication method 700 provided in an embodiment of this application. The method 700 may include:

[0423] S710, the UE receives the RRC reconfiguration signaling sent by the base station, and correspondingly, the base station sends the RRC reconfiguration signaling to the UE.

[0424] Specifically, the RRC reconfiguration signaling may include the aforementioned parameters #1 and #2 for each CC in the combination of CCs configured by the base station for the UE, or it may include the aforementioned parameter #3 for each CC in the combination of CCs configured by the base station for the UE. The base station is the base station of the cell in which the UE is currently in a connected state.

[0425] S720: The base station receives the RRC reconfiguration completion signaling sent by the UE. Correspondingly, the UE sends an RRC reconfiguration completion signaling to the base station.

[0426] S730: The UE receives the DCI sent by the base station, and correspondingly, the base station sends the DCI to the UE.

[0427] Specifically, this DCI indicates cell handover. The UE can perform cell handover based on the DCI indication and the parameters in the RRC reconfiguration signaling sent by the base station.

[0428] Since all CCs configured for the UE are active, outside of the steps in method 700, the CCs configured for the UE have already completed uplink and downlink synchronization and are reporting measurements. This avoids performing uplink and downlink synchronization of CCs during cell handover, effectively reducing cell handover latency.

[0429] It should be understood that the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0430] It should also be understood that, in the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0431] It should also be understood that the above embodiments are mainly illustrated using devices in existing network architectures as examples. It should be understood that the specific form of the device is not limited in the embodiments of this application. For example, any device that can achieve the same function in the future is applicable to the embodiments of this application.

[0432] It is understood that, in the above-described method embodiments, the methods and operations implemented by devices (such as the first communication device and the second communication device) can also be implemented by components (such as chips or circuits) that can be used in the devices.

[0433] It is also understood that some optional features in the various embodiments of this application may not depend on other features in some scenarios, or may be combined with other features in some scenarios, without limitation.

[0434] The above, combined with Figures 5 to 7 The communication method provided in the embodiments of this application is described in detail. The above-described communication method is mainly introduced from the perspective of the interaction between a first communication device (e.g., UE) and a second communication device (e.g., base station). It is understood that, in order to achieve the above functions, the first and second communication devices include hardware structures and / or software modules corresponding to perform each function.

[0435] Those skilled in the art will recognize that, based on the units and algorithm steps described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0436] The following, combined with Figures 8 to 10 This application provides a detailed description of the communication device provided in its embodiments. It should be understood that the descriptions of the device embodiments correspond to the descriptions of the method embodiments; therefore, any content not described in detail can be found in the above method embodiments. For brevity, some content is omitted.

[0437] This application embodiment can divide the first communication device and the second communication device into functional modules according to the above method example. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the division of each functional module according to each function as an example.

[0438] Figure 8 This is a schematic block diagram of a communication device 800 provided in an embodiment of this application. The device 800 includes a transceiver module 810. Optionally, the device 800 may further include a processing module 820. The transceiver module 810 can implement corresponding communication functions, and the processing module 820 is used for signal processing. In other words, the transceiver module 810 is used to perform receiving and transmitting related operations, and the processing module 820 is used to perform other operations besides receiving and transmitting. The transceiver module 810 may also be referred to as a communication interface or a communication unit. The transceiver module 810 may include a receiving module and / or a transmitting module, whereby the receiving module performs receiving-related operations and the transmitting module performs transmitting-related operations.

[0439] Optionally, the device 800 may further include a storage module 830, which can be used to store instructions and / or data. The processing module 820 can read the instructions and / or data in the storage module so that the device can perform the operation of the device in the aforementioned method embodiments. The above modules may also be referred to as units, such as transceiver units, processing units, storage units, etc.

[0440] In one design, the device 800 may correspond to the first communication device in the above method embodiments, or to a component of the first communication device (such as a chip).

[0441] The device 800 can implement the steps or processes corresponding to those performed by the first communication device in the above method embodiment. The transceiver module 810 can be used to perform transceiver-related operations of the first communication device in the above method embodiment, and the processing module 820 can be used to perform processing-related operations of the first communication device in the above method embodiment.

[0442] In one possible implementation, the transceiver module 810 is used to receive first control information from the second communication device.

[0443] For example, the transceiver module 810 is also configured to receive any one of frequency domain unit configuration information, data signals, or control signals from the second communication device.

[0444] For example, the processing module 820 is used to determine a first frequency domain unit before the transceiver module 810 receives the first control information from the second communication device. The transceiver module 810 can receive the first control information from the second communication device on the first frequency domain unit.

[0445] For example, the processing module 820 is used to determine capability information before the transceiver module 810 receives the first control information from the second communication device, and the transceiver module 810 can send the capability information.

[0446] For example, the processing module 820 is used to switch the frequency domain unit of the received data signal and / or control signal according to the first control information after the transceiver module 810 receives the first control information from the second communication device.

[0447] When the device 800 is used to perform Figure 5 When the method is in use, the transceiver module 810 can be used to execute the steps of sending and receiving information in the method, such as steps S530, S540, S550, S560a and S560b; the processing module 820 can be used to execute the processing steps in the method, such as step S510.

[0448] It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0449] In another design, the device 800 may correspond to the second communication device in the above method embodiment, or to a component of the second communication device (such as a chip).

[0450] The device 800 can implement the steps or processes corresponding to those performed by the second communication device in the above method embodiments. The transceiver module 810 can be used to perform transceiver-related operations of the second communication device in the above method embodiments, and the processing module 820 can be used to perform processing-related operations of the second communication device in the above method embodiments.

[0451] In one possible implementation, the transceiver module 810 is used to send first control information to the first communication device.

[0452] For example, the transceiver module 810 is also configured to send any one of frequency domain unit configuration information, data signal or control signal to the first communication device.

[0453] For example, the processing module 820 is used to determine the first frequency domain unit before the transceiver module 810 sends the first control information to the first communication device. The transceiver module 810 can send the first control information or frequency domain unit configuration information to the first communication device on the first frequency domain unit.

[0454] For example, the processing module 820 is used to determine the frequency domain unit configuration information before the transceiver module 810 sends the frequency domain unit configuration information to the first communication device.

[0455] For example, the transceiver module 810 is further configured to receive capability information sent by the first communication device before the processing module 820 determines the frequency domain unit configuration information, and the processing module 820 can determine the frequency domain unit configuration information based on the capability information.

[0456] When the device 800 is used to perform Figure 5 When the method is in use, the transceiver module 810 can be used to execute the steps of sending and receiving information in the method, such as steps S530, S540, S550, S560a and S560b; the processing module 820 can be used to execute the processing steps in the method, such as steps S510 and S520.

[0457] It should be understood that the specific process of each unit performing the above-mentioned corresponding steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0458] It should also be understood that the device 800 here is embodied in the form of a functional module. The term "module" here can refer to application-specific integrated circuits (ASICs), electronic circuits, processors (e.g., shared processors, proprietary processors, or group processors, etc.) and memories for executing one or more software or firmware programs, integrated logic circuits, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that the device 800 may specifically be a mobility management network element in the above embodiments, and may be used to execute the various processes and / or steps corresponding to the mobility management network element in the above method embodiments; or, the device 800 may specifically be a terminal device in the above embodiments, and may be used to execute the various processes and / or steps corresponding to the terminal device in the above method embodiments. To avoid repetition, further details are omitted here.

[0459] The apparatus 800 of each of the above-described schemes has the function of implementing the corresponding steps performed by the devices (such as the first communication device and the second communication device) in the above-described methods. This function can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions; for example, a transceiver module can be replaced by a transceiver (e.g., the transmitting unit in the transceiver module can be replaced by a transmitter, and the receiving unit in the transceiver module can be replaced by a receiver), and other units, such as processing modules, can be replaced by a processor, each executing the transmission and reception operations and related processing operations in the respective method embodiments.

[0460] In addition, the transceiver module 810 described above can also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing module can be a processing circuit.

[0461] Figure 9 This is a schematic diagram of another communication device 900 provided in this application embodiment. The device 900 includes a transceiver 930. Optionally, the device 900 also includes a processor 910. The processor 910 is used to execute computer programs or instructions stored in the memory 920, or to read data / signaling stored in the memory 920, to execute the methods in the above method embodiments. The transceiver 930 is used for receiving and / or transmitting signals. For example, the processor 910 is used to control the transceiver 930 to receive and / or transmit signals. The transceiver 930 may include a receiver and / or a transmitter, the receiver being used for receiving signals and the transmitter for transmitting signals; if the communication device 900 is a chip, then the transceiver 930 is the chip's input / output interface, where output corresponds to transmission and input corresponds to reception. Optionally, there may be one or more processors 910.

[0462] Optionally, such as Figure 9 As shown, the device 900 also includes a memory 920 for storing computer programs or instructions and / or data. The memory 920 may be integrated with the processor 910 or may be disposed separately. Optionally, there may be one or more memories 920.

[0463] As one option, the device 900 is used to implement the operations performed by the first communication device or the second communication device in the various method embodiments described above.

[0464] It should be understood that the processor mentioned in the embodiments of this application can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0465] It should also be understood that the memory mentioned in the embodiments of this application can be volatile memory and / or non-volatile memory. Non-volatile memory can 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 can be random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0466] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) can be integrated into the processor.

[0467] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0468] Figure 10 This is a schematic diagram of a chip system 1000 provided in an embodiment of this application. The chip system 1000 (or may also be referred to as a processing system) includes logic circuitry 1010 and an input / output interface 1020.

[0469] The logic circuit 1010 can be a processing circuit in the chip system 1000. The logic circuit 1010 can be coupled to a memory unit, calling instructions from the memory unit, enabling the chip system 1000 to implement the methods and functions of the embodiments of this application. The input / output interface 1020 can be an input / output circuit in the chip system 1000, outputting processed information from the chip system 1000, or inputting data or signaling information to be processed into the chip system 1000 for processing.

[0470] As one option, the chip system 1000 is used to implement the operations performed by the first communication device or the second communication device in the various method embodiments described above.

[0471] For example, logic circuit 1010 is used to implement processing-related operations performed by the terminal device in the above method embodiments; input / output interface 1020 is used to implement sending and / or receiving-related operations performed by the terminal device in the above method embodiments.

[0472] For example, logic circuit 1010 is used to implement processing-related operations performed by the network device in the above method embodiments; input / output interface 1020 is used to implement sending and / or receiving-related operations performed by the network device in the above method embodiments.

[0473] This application also provides a computer-readable storage medium storing computer instructions for implementing the methods executed by the device in the above-described method embodiments.

[0474] For example, when the computer program is executed by the computer, it enables the computer to implement the methods executed by the first communication device or the second communication device in the various embodiments of the above methods.

[0475] This application also provides a computer program product comprising instructions which, when executed by a computer, implement the methods performed by the first communication device or the second communication device in the above-described method embodiments.

[0476] This application also provides a communication system, including the device containing the aforementioned first communication device and the device containing the second communication device.

[0477] The explanations and beneficial effects of the relevant contents in any of the devices provided above can be found in the corresponding method embodiments provided above, and will not be repeated here.

[0478] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of apparatus or units may be electrical, mechanical, or other forms.

[0479] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. For example, the computer can be a personal computer, a server, or a network device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs). For example, the aforementioned available media include, but are not limited to, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, and other media capable of storing program code.

[0480] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, Applied to a first communication device, the method includes: The first control information is received in a first frequency domain unit, wherein the first control information instructs the first communication device to switch the frequency domain unit for receiving control signals from the first frequency domain unit to a second frequency domain unit, and / or the first control information instructs the first communication device to switch the frequency domain unit for receiving data signals from the first frequency domain unit to a second frequency domain unit.

2. The method according to claim 1, characterized in that, The method further includes: The second control information is received in one of the n third frequency domain units, where n is an integer greater than 0. The second control information instructs the first communication device to switch the frequency domain unit for receiving control signals from the first third frequency domain unit to the fourth frequency domain unit, and / or the second control information instructs the first communication device to switch the frequency domain unit for receiving data signals from the first third frequency domain unit to the fourth frequency domain unit.

3. The method according to claim 2, characterized in that, The first control information instructs the frequency domain unit of the first communication device receiving control signals to switch from the first frequency domain unit to the second frequency domain unit, and the second control information instructs the frequency domain unit of the first communication device receiving control signals to switch from the third frequency domain unit to the fourth frequency domain unit; and / or, The first control information instructs the frequency domain unit of the first communication device to receive data signals to switch from the first frequency domain unit to the second frequency domain unit, and the second control information instructs the frequency domain unit of the first communication device to receive data signals to switch from the third frequency domain unit to the fourth frequency domain unit.

4. The method according to any one of claims 1 to 3, characterized in that, The method further includes: Send capability information, which indicates that the first communication device supports a maximum number of carriers that can simultaneously receive signals, where m is an integer greater than 1.

5. The method according to any one of claims 1 to 4, characterized in that, The first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit, and the first control information further instructs: The frequency domain unit receiving the data signal switches from the first frequency domain unit to the fifth frequency domain unit.

6. The method according to any one of claims 1 to 5, characterized in that, The first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit, and receiving the first control information in the first frequency domain unit includes: receiving the first control information in the first frequency domain unit at time T1; The method further includes: At time T2, the control signal is received in the second frequency domain unit, wherein the time interval between time T1 and time T2 satisfies an interval time, the interval time including: The sum of the RF readjustment time and the baseband readjustment time; or, BB re-adjusted the time.

7. The method according to any one of claims 1 to 6, characterized in that, The control signal includes at least one of the following: DCI; Reference signal RS measurement information; Synchronization signal block SSB measurement information; or, Synchronize information.

8. The method according to any one of claims 1 to 7, characterized in that, The frequency domain unit is a carrier unit.

9. A communication method, characterized in that, Applied to a second communication device, the method includes: First control information is transmitted on a first frequency domain unit, the first control information instructing the frequency domain unit of the first communication device receiving control signals to switch from the first frequency domain unit to the second frequency domain unit, and / or, the first control information instructs the frequency domain unit of the first communication device receiving data signals to switch from the first frequency domain unit to the second frequency domain unit.

10. The method according to claim 9, characterized in that, The method further includes: A second control message is transmitted on one of the n third frequency domain units, where n is an integer greater than 0. The second control message instructs the first communication device to switch the frequency domain unit receiving the control signal from the first third frequency domain unit to the fourth frequency domain unit, and / or the second control message instructs the first communication device to switch the frequency domain unit receiving the data signal from the first third frequency domain unit to the fourth frequency domain unit.

11. The method according to claim 10, characterized in that, The first control information instructs the frequency domain unit of the first communication device receiving control signals to switch from the first frequency domain unit to the second frequency domain unit, and the second control information instructs the frequency domain unit of the first communication device receiving control signals to switch from the third frequency domain unit to the fourth frequency domain unit; and / or, The first control information instructs the frequency domain unit of the first communication device to receive data signals to switch from the first frequency domain unit to the second frequency domain unit, and the second control information instructs the frequency domain unit of the first communication device to receive data signals to switch from the third frequency domain unit to the fourth frequency domain unit.

12. The method according to any one of claims 9 to 11, characterized in that, The method further includes: The receiving capability information indicates that the first communication device supports a maximum number of carriers that can simultaneously receive signals, where m is an integer greater than 1.

13. The method according to any one of claims 9 to 12, characterized in that, The first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit, and the first control information further instructs: The frequency domain unit receiving the data signal switches from the first frequency domain unit to the fifth frequency domain unit.

14. The method according to any one of claims 9 to 13, characterized in that, The first control information instructs the frequency domain unit of the first communication device to switch from the first frequency domain unit to the second frequency domain unit, and the sending of the first control information on the first frequency domain unit includes: sending the first control information on the first frequency domain unit at time T1; The method further includes: At time T2, the control signal is transmitted in the second frequency domain unit, wherein the time interval between time T1 and time T2 satisfies an interval time, the interval time including: The sum of the RF readjustment time and the baseband readjustment time; or, BB re-adjusted the time.

15. The method according to any one of claims 9 to 14, characterized in that, The control signal includes at least one of the following: DCI; Reference signal RS measurement information; Synchronization signal block SSB measurement information; or, Synchronize information.

16. The method according to any one of claims 9 to 15, characterized in that, The frequency domain unit is a carrier unit.

17. A communication method, characterized in that, Applied to a first communication device, the method includes: Receive configuration information, which includes a first set of parameters and a second set of parameters; Receive third control information, the third control information instructing the first communication device to switch from the first cell to the second cell; When the second cell is the primary cell, control signals and data signals are received on the second cell using the first parameter set, or control signals and data signals are received on the second cell using both the first parameter set and the second parameter set; and / or, When the second cell is a secondary cell, the second parameter set is used to receive data signals on the second cell.

18. The method according to claim 17, characterized in that, The second cell is in an active state before receiving the third control information.

19. The method according to claim 17 or 18, characterized in that, The values ​​of the first parameter set are the same for the second cell and other cells during carrier aggregation; and / or, The values ​​of the second parameter set are the same when the second cell and other cells perform carrier aggregation.

20. The method according to claim 19, characterized in that, When the second cell is the primary cell, the first parameter set is used to receive control and data signals in the second cell, and the values ​​of the first parameter set are the same when the second cell performs carrier aggregation with other cells; or, When the second cell is the primary cell, control signals and data signals are received on the second cell using both the first parameter set and the second parameter set. The values ​​of the first parameter set and the second parameter set are the same when the second cell performs carrier aggregation with other cells; or... When the second cell is a secondary cell, the second parameter set is used to receive data signals on the second cell. The values ​​of the second parameter set are the same when the second cell and other cells are carrier aggregated.

21. The method according to any one of claims 17 to 20, characterized in that, When the first parameter set is used to receive control signals and data signals on the second cell, the first parameter set includes at least one of the following: Radio Link Monitoring (RLM) configuration information, Synchronization Reconfiguration (SRR) information, Cell Index Information, Cell Common Configuration Information, Cell Private Configuration Information, or Synchronization Signal Block Measurement Timing Configuration (SMTC) information. or, When receiving data signals on the second cell using the second parameter set, the second parameter set includes at least one of the following: cell index information, cell common configuration information, cell dedicated configuration information, or SMTC information; or, When receiving control signals and data signals on the second cell using the first parameter set and the second parameter set, the first parameter set includes at least one of the following: RLM configuration information or synchronization reconfiguration information; the second parameter set includes at least one of the following: cell index information, cell common configuration information, cell dedicated configuration information or SMTC information.

22. A communication method, characterized in that, Applied to a second communication device, the method includes: Send configuration information, which includes a first set of parameters and a second set of parameters; Send a third control message, the third control message instructing the first communication device to switch from the first cell to the second cell; When the second cell is the primary cell, control signals and data signals are transmitted on the second cell using the first parameter set, or control signals and data signals are transmitted on the second cell using both the first parameter set and the second parameter set; and / or, When the second cell is a secondary cell, the second parameter set is used to transmit data signals on the second cell.

23. The method according to claim 22, characterized in that, The second cell is in an active state before the third control information is sent.

24. The method according to claim 22 or 23, characterized in that, The values ​​of the first parameter set are the same for the second cell and other cells during carrier aggregation; and / or, The values ​​of the second parameter set are the same when the second cell and other cells perform carrier aggregation.

25. The method according to claim 24, characterized in that, When the second cell is the primary cell, control signals and data signals are transmitted in the second cell using the first parameter set, and the values ​​of the first parameter set are the same when the second cell performs carrier aggregation with other cells; or, When the second cell is the primary cell, control signals and data signals are transmitted on the second cell using both the first parameter set and the second parameter set. The values ​​of the first parameter set and the second parameter set are the same when the second cell performs carrier aggregation with other cells; or... When the second cell is a secondary cell, the second parameter set is used to transmit data signals on the second cell. The values ​​of the second parameter set are the same when the second cell and other cells are carrier aggregated.

26. The method according to any one of claims 22 to 25, characterized in that, When the first parameter set is used to transmit control signals and data signals on the second cell, the first parameter set includes at least one of the following: Radio Link Monitoring (RLM) configuration information, Synchronization Reconfiguration information, Cell Index information, Cell Common Configuration information, Cell Private Configuration information, or Synchronization Signal Block Measurement Timing Configuration (SMTC) information; or, When data signals are transmitted on the second cell using the second parameter set, the second parameter set includes at least one of the following: cell index information, cell common configuration information, cell dedicated configuration information, or SMTC information; or, When control signals and data signals are transmitted on the second cell using the first parameter set and the second parameter set, the first parameter set includes at least one of the following: RLM configuration information or synchronization reconfiguration information; the second parameter set includes at least one of the following: cell index information, cell common configuration information, cell dedicated configuration information or SMTC information.

27. A communication device, characterized in that, It includes units or modules for performing the method as described in any one of claims 1 to 8; or, it includes units or modules for performing the method as described in any one of claims 9 to 16; or, it includes units or modules for performing the method as described in any one of claims 17 to 21; or, it includes units or modules for performing the method as described in any one of claims 22 to 26.

28. A communication device, characterized in that, Includes at least one processor, said at least one processor being configured to execute computer programs or instructions, The communication device is configured to perform the method as described in any one of claims 1 to 8, or the communication device is configured to perform the method as described in any one of claims 9 to 16; or the communication device is configured to perform the method as described in any one of claims 17 to 21, or the communication device is configured to perform the method as described in any one of claims 22 to 26.

29. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program or instructions that, when executed on a computer, cause the method of any one of claims 1 to 26 to be performed.

30. A computer program product, characterized in that, It includes instructions that, when run on a computer, cause the method of any one of claims 1 to 26 to be performed.

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