A method and apparatus for uplink transmission

Abstract

Embodiments of the present application provide a kind of uplink transmission method and device, computer readable storage medium, computer program product and so on, can realize terminal equipment same frequency uplink transmission.The method comprises: determining multiple service cells, multiple service cells have at least one of the following association relationships: working frequency band is completely same, working frequency band is partially same;Send uplink signal to multiple service cells, wherein, it is sent to meet preset condition uplink signal.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method and apparatus for uplink transmission. Background Technology

[0002] Modern communication systems often employ co-frequency deployment to improve spectrum utilization. This means multiple cells in the network can be deployed on the same frequency band. Consequently, terminal devices may receive signals from multiple cells. When a user is in an edge area, they may experience interference from neighboring cells, leading to poor channel conditions. To better mitigate inter-cell interference and improve user speeds, coordinated multi-point (CoMP) technology is widely used. Through CoMP, multiple transmission reception points (TRPs) operating on the same frequency can cooperate to serve terminal devices.

[0003] Currently, terminal devices support carrier aggregation (CA) technology, which allows them to be configured to perform uplink and downlink data communication simultaneously across multiple carriers. However, CA currently primarily supports inter-frequency transmission and does not support intra-frequency transmission. Therefore, there is currently no solution for how terminal devices can perform intra-frequency uplink and downlink transmission to multiple carrier pairs (TPRs). Summary of the Invention

[0004] This application provides an uplink transmission method, a downlink transmission method, a cooperative transmission method and apparatus, a chip, a computer-readable storage medium, a computer program product, etc., which can enable terminal devices to perform synchronous transmission.

[0005] Firstly, this application provides an uplink transmission method that can be applied to a terminal device, or a chip or chipset within the terminal device. The method includes: determining multiple serving cells, wherein the multiple serving cells have at least one of the following relationships: operating in the same frequency band or partially operating in the same frequency band; and sending uplink signals to the multiple serving cells, wherein sending the uplink signals satisfies preset conditions. In this application embodiment, by establishing connections between serving cells, the terminal device achieves co-frequency uplink transmission.

[0006] In one possible design, when identifying multiple serving cells, the multiple serving cells can be determined based on indication information from the base station. This indication information indicates that the multiple serving cells have at least one of the following relationships: they operate in the same frequency band, or they partially operate in the same frequency band. In this design, the base station indicates the terminal device to the multiple serving cells with relationships through the indication information, enabling the terminal device to determine the relationships between the serving cells.

[0007] In one possible design, when determining multiple serving cells, these cells can be identified based on configuration information from the base station. In this design, the base station implicitly indicates to the terminal device the associated relationships between multiple serving cells through configuration information, enabling the terminal device to determine the relationships between serving cells and reducing signaling overhead.

[0008] In one possible design, the configuration information includes frequency domain configuration information. The frequency domain resources configured by the frequency domain configuration information of multiple serving cells have at least one of the following relationships: partial frequency band overlap, or complete overlap of all frequency bands. In this design, the terminal device can determine the association relationship between multiple cells without increasing signaling overhead by using the frequency domain configuration information of multiple serving cells.

[0009] In one possible design, the preset conditions may include at least one of the following: the total uplink signal power of multiple serving cells is less than or equal to the maximum transmit power of the terminal device; the total uplink signal power of multiple serving cells is less than or equal to the maximum transmit power of the terminal device in overlapping frequency bands, where overlapping frequency bands are the overlapping portions of the operating frequency bands of the multiple serving cells; and for any one of the multiple serving cells, the uplink signal power of any one serving cell is less than or equal to the maximum transmit power of the terminal device in any one serving cell. In the above design, the terminal device achieves uplink co-frequency transmission for multiple serving cells by jointly controlling the power of the associated multiple serving cells, ensuring that the total power of the uplink co-frequency transmission is within the maximum capability range of the terminal device.

[0010] In one possible design, if uplink signal transmission does not meet preset conditions before sending uplink signals to multiple serving cells, power back-off can be performed on the uplink signal power of at least one of the serving cells. In the above design, by performing power back-off on the serving cells, uplink co-frequency transmission can be better achieved.

[0011] In one possible design, when performing power backoff on the uplink signal power of at least one serving cell among multiple serving cells, the power backoff can be performed based on the priority of the multiple serving cells. In the above design, by combining priority for power backoff, the transmission performance of the terminal equipment can be better guaranteed.

[0012] In one possible design, the transmit power margin can also be determined based on the uplink signal power of multiple serving cells. In the above design, by combining the uplink power of multiple serving cells to report the transmit power margin during uplink co-frequency transmission, the base station can perform resource scheduling more accurately.

[0013] In one possible design, the preset condition can be that uplink signal transmission is performed in a time-division multiplexing manner to multiple serving cells. In the above design, by limiting the uplink scheduling of serving cells, the total power of uplink co-frequency transmission is kept within the maximum capacity of the terminal equipment, thereby enabling uplink co-frequency transmission.

[0014] Secondly, this application provides an uplink transmission method that can be applied to a base station, or a chip or chipset within the base station. The method includes: configuring multiple serving cells to a terminal device, wherein the multiple serving cells have at least one of the following relationships: identical operating frequency bands or partially identical operating frequency bands; and instructing the terminal device that the multiple serving cells have at least one of the following relationships: identical operating frequency bands or partially identical operating frequency bands. In this application embodiment, by establishing connections between serving cells and instructing the terminal device of the relationships indicated by the serving cells through the base station, the terminal device achieves same-frequency uplink transmission.

[0015] In one possible design, when multiple serving cells have at least one of the following relationships—that they operate in the same frequency band or partially in the same frequency band—the base station can send indication information to the terminal device. This indication information indicates that the multiple serving cells have at least one of the following relationships: that they operate in the same frequency band or partially in the same frequency band. In this design, the base station uses the indication information to indicate the multiple serving cells with relationships to the terminal device, enabling the terminal device to determine the relationships between the serving cells.

[0016] In one possible design, when multiple serving cells have at least one of the following relationships, indicating to the terminal device that they operate in the same frequency band or partially in the same frequency band, can be done through the configuration information of the serving cells. In this design, the base station implicitly indicates to the terminal device the relationships between multiple serving cells through configuration information, enabling the terminal device to determine the relationships between serving cells and reducing signaling overhead.

[0017] In one possible design, the configuration information includes frequency domain configuration information. The frequency domain resources configured for multiple serving cells may partially overlap or completely overlap. In this design, the base station can indicate the association relationship between multiple cells without increasing signaling overhead by using the frequency domain configuration information of multiple serving cells.

[0018] Thirdly, this application provides a cooperative transmission method that can be applied to a base station, or a chip or chipset within a base station. The method includes: receiving first scheduling information from at least one base station, the first scheduling information being used for scheduling uplink frequency domain resources; and determining its own first scheduling information based on the first scheduling information of the at least one base station, wherein the frequency domain resources scheduled by its own first scheduling information and the frequency domain resources scheduled by the first scheduling information of the at least one base station satisfy at least one of the following relationships: completely identical frequency bands, or partially identical frequency bands. In this application embodiment, base stations establish an association relationship by exchanging their respective uplink frequency domain resource scheduling information.

[0019] In one possible design, the system receives second scheduling information from at least one base station. This second scheduling information is used for scheduling uplink time-domain resources. Based on the second scheduling information from at least one base station, the system determines its own second scheduling information, wherein the time-domain resources scheduled by its own second scheduling information are different from those scheduled by the second scheduling information of at least one base station. In this design, base stations exchange their respective uplink time-domain resource scheduling information, enabling time-division uplink scheduling between them. This ensures that the total power of uplink co-frequency transmission remains within the maximum capability of the terminal equipment, thereby achieving uplink co-frequency transmission.

[0020] In one possible design, third scheduling information from at least one base station is received. This third scheduling information is used for scheduling downlink transmission resources. Based on the third scheduling information from at least one base station, the system determines its own third scheduling information. The code division multiplexing (CDM) group in which the demodulation reference signal (DMRS) scheduled by the system's own third scheduling information belongs is different from the CDM group in which the DMRS scheduled by the second scheduling information of at least one base station belongs. In this design, base stations exchange their respective downlink transmission resource scheduling information, enabling the DMRS of multi-TRP scheduled data to use different CDM groups, i.e., time-frequency resources are orthogonal, thus ensuring better performance of DMRS channel estimation.

[0021] Fourthly, this application provides a cooperative transmission method that can be applied to a base station, or a chip or chipset within a base station. The method includes: determining first scheduling information corresponding to at least one base station, the first scheduling information being used for scheduling uplink frequency domain resources, and the frequency domain resources scheduled by the first scheduling information of at least one base station satisfying at least one of the following relationships: completely identical frequency bands, or partially identical frequency bands; and sending the corresponding first scheduling information to at least one base station. In this application embodiment, a centralized control device allocates scheduling information for uplink frequency domain resources among various base stations, enabling the base stations to establish an association relationship.

[0022] In one possible design, second scheduling information is determined for at least one base station, which is used for scheduling uplink time-domain resources. The time-domain resources scheduled by the second scheduling information of the at least one base station are different. The corresponding second scheduling information is then sent to each of the at least one base station. In this design, the scheduling information for scheduling uplink time-domain resources allocated to each base station by the centralized control device enables time-division uplink scheduling between base stations, ensuring that the total power of uplink co-frequency transmission remains within the maximum capability of the terminal equipment, thereby achieving uplink co-frequency transmission.

[0023] In one possible design, third scheduling information is determined for at least one base station. This third scheduling information is used for downlink resource scheduling, and the DMRS scheduled by the third scheduling information of at least one base station belongs to a different CDM group. The corresponding third scheduling information is then sent to at least one base station. In the above design, the scheduling information for scheduling downlink transmission resources allocated to each base station by the centralized control equipment enables the DMRS of multi-TRP scheduled data to use different CDM groups, i.e., time-frequency resources are orthogonal, thereby ensuring better performance of DMRS channel estimation.

[0024] Fifthly, this application provides a method for cooperative transmission, which can be applied to a base station, or a chip or chipset in a base station. The method includes: receiving first scheduling information allocated by a control device for a first base station, the first scheduling information being used for scheduling uplink frequency domain resources, and the frequency domain resources scheduled by the first scheduling information allocated by the control device for the first base station and the first scheduling information allocated by the control device for at least one second base station satisfying at least one of the following relationships: the frequency bands are completely identical, or the frequency bands are partially identical; determining uplink frequency domain resources based on the first scheduling information allocated by the control device for the first base station. In this application embodiment, scheduling information for scheduling uplink frequency domain resources allocated between various base stations by a centralized control device enables the establishment of association relationships between base stations.

[0025] In one possible design, the receiving control device allocates second scheduling information for the first base station. This second scheduling information is used for scheduling uplink time-domain resources, and the time-domain resources scheduled by the second scheduling information allocated by the control device for the second base station are different from those scheduled by the second scheduling information allocated by the control device for at least one second base station. Uplink time-domain resources are determined based on the first scheduling information allocated by the control device for the first base station. In this design, by allocating uplink time-domain resource scheduling information to each base station through a centralized control device, time-division uplink scheduling can be performed between base stations, ensuring that the total power of uplink co-frequency transmission is within the maximum capability range of the terminal equipment, thereby achieving uplink co-frequency transmission.

[0026] In one possible design, the receiving control device allocates third scheduling information for the first base station. This third scheduling information is used for uplink time-domain resource scheduling. The third scheduling information allocated by the control device for the second base station differs from the CDM group to which the DMRS scheduled by the control device for at least one second base station belongs. The CDM group to which the downlink scheduled DMRS belongs is determined based on the third scheduling information allocated by the control device for the first base station. In this design, by centrally controlling the allocation of downlink transmission resource scheduling information to each base station, the DMRS of multi-TRP scheduled data can use different CDM groups, meaning that time-frequency resources are orthogonal, thereby ensuring better DMRS channel estimation performance.

[0027] Sixthly, this application provides a downlink transmission method that can be applied to a terminal device, or a chip or chipset in the terminal device. The method includes: receiving configuration information from a first serving cell of a base station, the configuration information including at least one synchronization signal block (SS / PBCH block, SSB) configuration information of a second serving cell, wherein the second serving cell and the first serving cell have at least one of the following relationships: identical operating frequency bands or partially identical operating frequency bands; and receiving downlink transmission from the second serving cell based on the SSB configuration information. Through this application embodiment, the terminal device can receive SSBs of other serving cells within the current serving cell and can track the signals of other serving cells, then establish a connection between the synchronization signal, tracking signal, and data channel or channel state information reference signal (CSI-RS) or control channel of other cells, thereby enabling more accurate reception of data channels, CSI-RS, or control channels from other cells.

[0028] In one possible design, the SSB configuration information includes an SSB index and a cell identifier. With this design, the terminal device can determine the serving cell to which the SSB belongs based on the cell identifier, thus enabling it to accurately receive the SSB from the serving cell.

[0029] In one possible design, the configuration information includes configuration information for at least one carrier, wherein the second serving cell transmits the SSB on at least one carrier. With this design, the terminal device can determine the carrier on which the SSB is located based on the carrier configuration information, thereby accurately receiving the SSB of the serving cell.

[0030] In one possible design, the carrier configuration information includes at least one of the following: frequency domain location information and carrier identifier.

[0031] In one possible design, the configuration information includes a detection time window, wherein the detection time window indicates the time period for detecting the SSB of the first serving cell, or the detection time window indicates the time period for detecting the SSB of the second serving cell. With this design, the terminal device can determine the time period for receiving the SSB of the serving cell based on the detection time window, thereby accurately receiving the SSB of the serving cell.

[0032] Seventhly, this application provides a downlink transmission method that can be applied to a base station, or a chip or chipset in the base station. The method includes: configuring an SSB for at least one second serving cell; sending configuration information of a first serving cell to a terminal device, the configuration information including SSB configuration information of at least one second serving cell, wherein the second serving cell and the first serving cell have at least one of the following relationships: operating in the same frequency band or partially the same operating frequency band. In this application embodiment, the base station carries synchronization signal block configuration information of neighboring cells in the configuration information of the serving cell, thereby enabling the terminal device to receive the SSB of other serving cells within the current serving cell and to track the signals of other serving cells. Then, it establishes a connection between the synchronization signal, tracking signal, and data channel, CSI-RS, or control channel of other cells, thereby enabling more accurate reception of data channels, CSI-RS, or control channels from other cells.

[0033] In one possible design, the SSB configuration information includes an SSB index and a cell identifier. With this design, the terminal device can determine the serving cell to which the SSB belongs based on the cell identifier, thus enabling it to accurately receive the SSB from the serving cell.

[0034] In one possible design, the configuration information includes configuration information for at least one carrier, wherein the second serving cell transmits the SSB on at least one carrier. With this design, the terminal device can determine the carrier on which the SSB is located based on the carrier configuration information, thereby accurately receiving the SSB of the serving cell.

[0035] In one possible design, the carrier configuration information includes at least one of the following: frequency domain location information and carrier identifier.

[0036] In one possible design, the configuration information includes a detection time window, wherein the detection time window indicates the time period for detecting the SSB of the first serving cell, or the detection time window indicates the time period for detecting the SSB of the second serving cell. With this design, the terminal device can determine the time period for receiving the SSB of the serving cell based on the detection time window, thereby accurately receiving the SSB of the serving cell.

[0037] In one possible design, when configuring an SSB for at least one second serving cell, a quasi-co-located tracking reference signal can be configured for the downlink transmission of the terminal device; the SSB of at least one second serving cell is configured based on the tracking reference signal, wherein the tracking reference signal and the SSB of the second serving cell are quasi-co-located. Through this design, the terminal device can establish connections between the synchronization signals, tracking signals, and data channels, CSI-RS, or control channels of other cells based on the SSBs of neighboring cells, thereby enabling more accurate reception of data channels, CSI-RS, or control channels from other cells.

[0038] Eighthly, this application provides an uplink transmission apparatus, which may be a communication device or a chip or chipset within a communication device, wherein the communication device may be a terminal device or a base station. The apparatus may include a processing module and a transceiver module. When the apparatus is a communication device, the processing module may be a processor, and the transceiver module may be a transceiver; the apparatus may also include a storage module, which may be a memory; the storage module is used to store instructions, and the processing module executes the instructions stored in the storage module to cause the terminal device to perform the corresponding function in the first aspect above, or the processing module executes the instructions stored in the storage module to cause the base station to perform the corresponding function in the second aspect above. When the apparatus is a chip or chipset within a communication device, the processing module may be a processor, processing circuit, or logic circuit, and the transceiver module may be an input / output interface, interface circuit, output circuit, input circuit, pin, or circuit, etc.; the processing module executes the instructions stored in the storage module to cause the terminal device to perform the corresponding function in the first aspect above, or the processing module executes the instructions stored in the storage module to cause the base station to perform the corresponding function in the second aspect above. The storage module can be a storage module within the chip or chipset (e.g., registers, caches, etc.), or it can be a storage module located outside the chip or chipset within the base station (e.g., read-only memory, random access memory, etc.).

[0039] Ninthly, this application provides a cooperative transmission apparatus, which may be a base station or a chip or chipset within a base station. The apparatus may include a processing module and a transceiver module. When the apparatus is a base station, the processing module may be a processor, and the transceiver module may be a transceiver; the apparatus may also include a storage module, which may be a memory; the storage module stores instructions, and the processing module executes the instructions stored in the storage module to cause the base station to perform the corresponding functions described in the third to fifth aspects above. When the apparatus is a chip or chipset within a base station, the processing module may be a processor, processing circuit, or logic circuit, and the transceiver module may be an input / output interface, interface circuit, output circuit, input circuit, pin, or circuit, etc.; the processing module executes the instructions stored in the storage module to cause the base station to perform the corresponding functions described in the third to fifth aspects above. The storage module may be a storage module within the chip or chipset (e.g., a register, cache, etc.), or a storage module located outside the chip or chipset within the base station (e.g., a read-only memory, random access memory, etc.).

[0040] In a tenth aspect, this application provides a downlink transmission apparatus, which may be a communication device or a chip or chipset within a communication device, wherein the communication device may be a terminal device or a base station. The apparatus may include a processing module and a transceiver module. When the apparatus is a communication device, the processing module may be a processor, and the transceiver module may be a transceiver; the apparatus may also include a storage module, which may be a memory; the storage module is used to store instructions, and the processing module executes the instructions stored in the storage module to cause the terminal device to perform the corresponding function in the sixth aspect above, or the processing module executes the instructions stored in the storage module to cause the base station to perform the corresponding function in the seventh aspect above. When the apparatus is a chip or chipset within a communication device, the processing module may be a processor, processing circuit, or logic circuit, and the transceiver module may be an input / output interface, interface circuit, output circuit, input circuit, pin, or circuit, etc.; the processing module executes the instructions stored in the storage module to cause the terminal device to perform the corresponding function in the sixth aspect above, or the processing module executes the instructions stored in the storage module to cause the base station to perform the corresponding function in the seventh aspect above. The storage module can be a storage module within the chip or chipset (e.g., registers, caches, etc.), or it can be a storage module located outside the chip or chipset within the base station (e.g., read-only memory, random access memory, etc.).

[0041] Eleventhly, an uplink transmission apparatus is provided, comprising: a processor, a communication interface, and a memory. The communication interface is used for transmitting information, and / or messages, and / or data between the apparatus and other devices. The memory is used to store computer-executable instructions, and when the apparatus is running, the processor executes the computer-executable instructions stored in the memory to cause the apparatus to perform the uplink transmission method as described in the first aspect or any design of the first aspect, the second aspect or any design of the second aspect.

[0042] In a twelfth aspect, a cooperative transmission apparatus is provided, comprising: a processor, a communication interface, and a memory. The communication interface is used for transmitting information, and / or messages, and / or data between the apparatus and other devices. The memory is used to store computer-executable instructions, and when the apparatus is running, the processor executes the computer-executable instructions stored in the memory to cause the apparatus to perform the uplink transmission method as described in the third aspect or any design of the third aspect, the fourth aspect or any design of the fourth aspect, or the fifth aspect or any design of the fifth aspect.

[0043] In a thirteenth aspect, an uplink transmission apparatus is provided, comprising: a processor, a communication interface, and a memory. The communication interface is used for transmitting information, and / or messages, and / or data between the apparatus and other devices. The memory is used to store computer-executable instructions, and when the apparatus is running, the processor executes the computer-executable instructions stored in the memory to cause the apparatus to perform the uplink transmission method as described in the sixth aspect or any design of the sixth aspect, or the seventh aspect or any design of the seventh aspect.

[0044] In a fourteenth aspect, embodiments of this application provide a computer storage medium storing program instructions that, when executed on a communication device, cause the communication device to perform the methods of the first aspect and any possible design of the second aspect and any possible design of the third aspect and any possible design of the fourth aspect and any possible design of the fifth aspect and any possible design of the fifth aspect and any possible design of the sixth aspect and any possible design of the seventh aspect and any possible design of the eighth aspect and any possible design of the embodiments of this application.

[0045] In the fifteenth aspect, an embodiment of this application provides a computer program product that, when run on a communication device, enables the communication device to perform a method according to the first aspect and any possible design thereof, the second aspect and any possible design thereof, the third aspect and any possible design thereof, the fourth aspect and any possible design thereof, the fifth aspect and any possible design thereof, the sixth aspect and any possible design thereof, the seventh aspect and any possible design thereof, and the eighth aspect and any possible design thereof.

[0046] In a sixteenth aspect, an embodiment of this application provides a chip coupled to a memory, which executes the methods of the first aspect and any possible design of the second aspect and any possible design of the third aspect and any possible design of the fourth aspect and any possible design of the fifth aspect and any possible design of the fifth aspect and any possible design of the sixth aspect and any possible design of the seventh aspect and any possible design of the eighth aspect and any possible design of the embodiment of this application.

[0047] In a seventeenth aspect, embodiments of this application provide a chip including a communication interface and at least one processor, the processor being configured to execute the methods described in the first aspect or any design of the first aspect, the second aspect and any possible design thereof, the third aspect and any possible design thereof, the fourth aspect and any possible design thereof, the fifth aspect and any possible design thereof, the sixth aspect and any possible design thereof, the seventh aspect and any possible design thereof, and the eighth aspect and any possible design thereof.

[0048] It should be noted that in the embodiments of this application, "coupling" refers to two components being directly or indirectly combined with each other. Attached Figure Description

[0049] Figure 1 This application provides a schematic diagram of the architecture of a communication system.

[0050] Figure 2 A schematic diagram illustrating multi-TRP collaboration provided in an embodiment of this application;

[0051] Figure 3 A schematic diagram of uplink transmission based on CA provided for an embodiment of this application;

[0052] Figure 4 A flowchart illustrating an uplink transmission method provided in an embodiment of this application;

[0053] Figure 5 A schematic flowchart illustrating a downlink transmission method provided in an embodiment of this application;

[0054] Figure 6 This is a schematic diagram of scenario one provided in an embodiment of this application;

[0055] Figure 7 A schematic diagram of scenario two provided in the embodiments of this application;

[0056] Figure 8 This is a schematic diagram of scenario three provided in the embodiments of this application;

[0057] Figure 9 A schematic diagram of a device structure provided in an embodiment of this application;

[0058] Figure 10 This is a schematic diagram of another device structure provided in an embodiment of this application. Detailed Implementation

[0059] To facilitate understanding of the embodiments of this application, the following terms related to the embodiments of this application are introduced:

[0060] 1. Quasi-collocation (QCL):

[0061] Quasi-co-location, also known as quasi-co-station or co-location.

[0062] The signals corresponding to antenna ports with QCL relationship can have the same or similar spatial characteristic parameters (or parameters). Alternatively, the spatial characteristic parameters (or parameters) of one antenna port can be used to determine the spatial characteristic parameters (or parameters) of another antenna port with QCL relationship with that antenna port. Alternatively, two antenna ports have the same or similar spatial characteristic parameters (or parameters). Alternatively, the difference between the spatial characteristic parameters (or parameters) of two antenna ports is less than a certain threshold.

[0063] It should be understood that the spatial characteristic parameters of two reference signals or channels that satisfy the QCL relationship are the same (or similar, or nearly similar), and thus the spatial characteristic parameters of the target reference signal can be inferred based on the resource index of the source reference signal.

[0064] It should also be understood that the spatial characteristic parameters of two reference signals or channels that satisfy spatial correlation information are the same (or similar, or nearly similar), so the spatial characteristic parameters of the target reference signal can be inferred based on the source reference signal resource index.

[0065] The spatial characteristic parameters include one or more of the following parameters:

[0066] Angle of arrival (AoA), dominant angle of arrival (AoA), average angle of arrival, power angular spectrum (PAS) of the angle of arrival, angle of departure (AoD), dominant angle of departure, average angle of departure, power angular spectrum of the angle of departure, terminal equipment transmit beamforming, terminal equipment receive beamforming, spatial channel correlation, network equipment transmit beamforming, network equipment receive beamforming, average channel gain, average channel delay, delay spread, Doppler spread, Doppler shift, spatial Rx parameters, etc.

[0067] The aforementioned perspectives can be decomposition values ​​of different dimensions, or combinations of decomposition values ​​of different dimensions.

[0068] The existing standard defines four types of QCLs. Network devices can configure one or more types of QCLs for terminal devices simultaneously, such as QCL type A+D, C+D:

[0069] QCL types A: Doppler shift, Doppler spread, average delay, delay spread.

[0070] QCL types B: Doppler shift, Doppler spread.

[0071] QCL types C: average delay, Doppler shift.

[0072] QCL types D: Spatial Rx parameter.

[0073] When the QCL relationship refers to type D, it can be considered spatial QCL. When antenna ports satisfy a spatial QCL relationship, it can be a QCL relationship (also called a spatial relation) between downlink signal ports or between uplink signal ports. This can mean that two signals have the same AoA or AoD, indicating they have the same receive or transmit beam. For example, for the QCL relationship between downlink and uplink signals or between uplink and downlink signal ports, it can mean that the AoA and AoD of the two signals are corresponding, or that the AoD and AoA of the two signals are corresponding. That is, beam reciprocity can be used to determine the uplink transmit beam based on the downlink receive beam, or vice versa.

[0074] Signals transmitted on ports with spatial QCL relationships can also be understood as signals received or transmitted using the same spatial filter. The spatial filter can be at least one of the following: precoding, antenna port weighting, antenna port phase deflection, or antenna port amplitude gain.

[0075] Signals transmitted on ports with spatial QCL relationships can also be understood as having corresponding beam pair links (BPLs). A corresponding BPL includes at least one of the following: the same downlink BPL, the same uplink BPL, an uplink BPL corresponding to the downlink BPL, and a downlink BPL corresponding to the uplink BPL.

[0076] Therefore, spatial reception parameters (i.e., QCL of type D) can be understood as parameters used to indicate the direction information of the received beam.

[0077] In the examples of this application, the correspondence of certain parameters can also be applied to scenarios described by QCL.

[0078] It should be understood that the scenarios applicable to the QCL assumption in this application can also be two reference signals, or further, the relationship between transmission objects.

[0079] 2. Transmission Configuration Indicator (TCI) Status:

[0080] TCI (Transmission Control Information) is used to indicate the QCL (Quality Continuity Classification) information of a signal or channel. The channel can be a physical downlink control channel (PDCCH) / control resource set (CORESET) or a physical downlink shared channel (PDSCH). The signal can be a channel state information reference signal (CSI-RS), demodulation reference signal (DMRS), tracking reference signal (TRS), etc. TCI information indicates that the reference signal included in the TCI satisfies the QCL relationship with the channel or signal. It is mainly used to indicate that when receiving a signal or channel, its spatial characteristic parameters are the same, similar, or nearly identical to the spatial characteristic parameters of the reference signal included in the TCI.

[0081] A TCI state can be configured with one or more referenced signals and their associated QCL types. QCL types are further divided into four categories: A, B, C, and D, which represent different combinations or selections of {Doppler shift, Doppler spread, average delay, delay spread, spatial Rx parameter}. The TCI state contains QCL information, or the TCI state is used to indicate QCL information.

[0082] 3. Synchronous signal broadcast channel block (SS / PBCH block):

[0083] The SS / PBCH block can also be called SSB. PBCH is an abbreviation for Physical Broadcast Channel. The SSB contains at least one of the primary synchronization signal (PSS), secondary synchronization signal (SSS), and PBCH. It is primarily used for cell search, cell synchronization, and carrying broadcast information.

[0084] 4. Cell carrier related concepts:

[0085] Component carrier (CC): A component carrier, also known as a component carrier, constituent carrier, or member carrier, is a carrier in multi-carrier aggregation. Each carrier consists of one or more physical resource blocks (PRBs). Each carrier may have its own corresponding PDCCH, scheduling the PDSCH of its respective CC; alternatively, some carriers may not have a PDCCH, in which case cross-carrier scheduling can be performed, meaning the PDCCH of one CC schedules the PDSCH of another CC. Terminal equipment can receive data on multiple CCs.

[0086] Carrier aggregation (CA): Carrier aggregation can refer to combining multiple consecutive or non-consecutive unit carriers into a larger bandwidth.

[0087] Primary cell / primary serving cell (PCell): The primary cell / primary serving cell is the cell where the CA UE camps. Generally, only the PCell has a physical uplink control channel (PUCCH).

[0088] Primary Secondary Cell (PSCell): A PSCell is a special secondary cell on the secondary eNodeB (SeNB) that is configured by the master eNodeB (MeNB) to the DC UE via RRC connection signaling.

[0089] Secondary Cell (SCell): An SCell is a cell configured for a CA terminal device via RRC connection signaling. It operates on a secondary carrier (SCC) and can provide more radio resources for the CA terminal device. An SCell can have only downlink or both uplink and downlink.

[0090] Special Cell (SpCell): In dual connectivity (DC) scenarios, SpCell refers to the PCell of the master cell group (MCG) or the PSCell of the secondary cell group (SCG); otherwise, such as in CA scenarios, SpCell refers to the PCell.

[0091] MCG / SCG: MCG refers to the group of cells in the main base station that provide services to terminal devices. In dual-connectivity mode, the MeNB is associated with a group of serving cells, including PCell and one or more SCells.

[0092] SCG refers to the group of cells in the secondary base station that provide services to the UE. In dual-link mode, it includes PSCell, or includes PSCell and at least one SCell.

[0093] MeNB / SeNB: MeNB is the base station to which the DC terminal equipment belongs in the cell. SeNB is another base station configured by MeNB to the DC UE via RRC connection signaling.

[0094] It should be noted that as technology continues to develop, the terminology used in the embodiments of this application may change, but all of them are within the scope of protection of this application.

[0095] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0096] The communication method provided in this application can be applied to various communication systems, such as the Internet of Things (IoT), narrowband Internet of Things (NB-IoT), long term evolution (LTE), fifth-generation (5G) communication systems, hybrid LTE and 5G architectures, 5G NR systems, and new communication systems emerging in future communication development. The 5G communication system described in this application can include at least one of non-standalone (NSA) and standalone (SA) 5G communication systems. The communication system can also be a public land mobile network (PLMN), a device-to-device (D2D) network, a machine-to-machine (M2M) network, or other networks.

[0097] Figure 1 A communication system 100 applicable to embodiments of this application is illustrated. The communication system 100 operates in a dual connectivity (DC) or CoMP scenario. The communication system 100 includes a network device 110, a network device 120, and a terminal device 130. Network device 110 can be the network device used when the terminal device 130 initially accesses the network, responsible for RRC communication with the terminal device 130. Network device 120 is added during RRC reconfiguration to provide additional wireless resources. The terminal device 130, configured with CA, is connected to network devices 110 and 120. The link between network device 110 and terminal device 130 can be referred to as the first link, and the link between network device 120 and terminal device 130 can be referred to as the second link.

[0098] The communication systems described above, applicable to the embodiments of this application, are merely illustrative examples. The communication systems applicable to the embodiments of this application are not limited to these examples. For instance, the number of network devices and terminal devices included in the communication system can be other numbers, or it can employ a single base station, multi-carrier aggregation scenario, dual-link scenario, D2D communication scenario, or CoMP scenario. CoMP can be one or more of the following scenarios: non-coherent joint transmission (NCJT), coherent joint transmission (CJT), and joint transmission (JT).

[0099] The terminal device involved in the embodiments of this application is an entity on the user side used to receive or transmit signals. The terminal device can be a device that provides voice and data connectivity to the user, such as a handheld device or vehicle-mounted device with wireless connectivity. The terminal device can also be other processing devices connected to a wireless modem. The terminal device can communicate with one or more core networks through a radio access network (RAN). The terminal device can also be referred to as a wireless terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal, access terminal, user terminal, user agent, user device, or user equipment, etc. The terminal device can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile device that exchanges voice and data with the radio access network. For example, the terminal device can also be a Personal Communication Service (PCS) telephone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and other devices. Common terminal devices include mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), and wearable devices such as smartwatches, smart bracelets, and pedometers, but the embodiments of this application are not limited to these. The terminal devices involved in the embodiments of this application can also be terminal devices that will appear in future evolution PLMNs, and the embodiments of this application are not limited to this.

[0100] Furthermore, in this embodiment, the terminal device can also be a terminal device in an IoT system. 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 of human-machine interconnection and object-to-object interconnection. In this embodiment, IoT technology can achieve massive connectivity, deep coverage, and low terminal power consumption through technologies such as narrowband (NB).

[0101] In addition, in this embodiment, the terminal device may also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (for some terminal devices), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0102] The network device involved in this application embodiment is a network-side entity used for transmitting or receiving signals. It can be used to convert received air frames and Internet Protocol (IP) packets, acting as a router between the terminal device and the rest of the access network. The network device can also coordinate the attribute management of the air interface. The network device in this application embodiment can be a device in a wireless network, such as a RAN node that connects a terminal to the wireless network. For example, the network device can be an evolved Node B (eNB or e-NodeB) in LTE, a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized unit (CU), a new radio base station, a remote radio module, a micro base station, a relay, a distributed unit (DU), a femtocell, a transmission reception point (TRP) or transmission point (TP), or any other wireless access device. In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB can also include an active antenna unit (AAU). The CU and DU implement some of the gNB's functions. For example, the CU handles non-real-time protocols and services, implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU handles physical layer protocols and real-time services, implementing the functions of the radio link control (RLC), media access control (MAC), and physical (PHY) layers. The AAU implements some physical layer processing functions, radio frequency processing, and related functions of the active antenna. Since RRC layer information ultimately becomes PHY layer information, or is derived from PHY layer information, in this architecture, higher-layer signaling, such as RRC layer signaling, can also be considered as being sent by the DU, or by the DU+AAU. It is understandable that network devices can be devices that include one or more of the following: CU nodes, DU nodes, and AAU nodes.Furthermore, the CU can be classified as a network device in the radio access network (RAN) or as a network device in the core network (CN), and this application does not limit this classification. The network device can cover one or more cells.

[0103] The network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0104] Modern communication systems often employ co-frequency deployment to improve spectrum utilization. This means multiple cells in the network can be deployed on the same frequency band. Consequently, terminal devices may receive signals from multiple cells. When a terminal device is located in an edge area, it may experience interference from neighboring cells, leading to poor channel conditions. To better mitigate inter-cell interference and improve user speeds, CoMP (Co-frequency Interference Management) is widely used.

[0105] Network devices cooperate by exchanging information, thereby effectively avoiding interference and improving speed. Multiple TRPs can cooperate to provide downlink services to terminal devices or to receive uplink signals from terminal devices. Cooperation technologies mainly include JT (Joint Transmission), dynamic cell / point selection (DCS / DPS), and coordinated beamforming / scheduling (CB / CS). Figure 2 As shown, solid arrows represent interference to the terminal device, while dashed arrows represent useful data generated for the terminal device. In non-cooperative scenarios, edge terminal devices receive signals from their own cell but are affected by interference from neighboring cells. In JT technology, multiple cells jointly send data to the terminal device, resulting in multiple sets of useful data and thus increasing the transmission rate. In CSCB technology, interference from neighboring cells is coordinated; for example, neighboring cells can adjust their transmission signals to avoid sending signals to the terminal device in directions of strong interference, thereby reducing the interference level of the terminal device. In DPS / DCS technology, the network dynamically selects better transmission points to serve the terminal device, ensuring that the terminal device operates under stronger cell signals, while weaker cell signals become interference. By utilizing the differences in channels across multiple TRPs, the signal-to-interference-plus-noise ratio (SIR) of the terminal device can be improved.

[0106] When multiple TRPs cooperate to provide uplink services to a terminal device, the terminal device can simultaneously transmit uplink signals to multiple TRPs. Currently, the simultaneous transmission of uplink signals from a terminal device to multiple network devices can be achieved using CA (Carrier Association) technology. The terminal device can be configured with multiple carriers for uplink and downlink data communication. Taking PUCCH as an example, the terminal device can be configured with multiple carriers for transmitting PUCCH. For instance, the terminal device may have PUCCH configured on a Pcell, and it can also have PUCCH configured on an additional Scell. Figure 3 As shown, the terminal device can be configured to transmit PUCCH1 simultaneously on uplink carrier 0 (or uplink serving cell 0) and uplink carrier 3 (or uplink serving cell 3), and can also be configured to transmit PUCCH2 simultaneously on uplink carrier 1 (or uplink serving cell 1) and uplink carrier 2 (or uplink serving cell 2).

[0107] Currently, CA primarily handles inter-frequency transmission and does not support intra-frequency transmission, such as intra-frequency downlink scheduling and intra-frequency uplink transmission. Therefore, there is currently no solution for how terminal devices can perform intra-frequency uplink transmission to multiple TPRs deployed at the same frequency.

[0108] Based on this, embodiments of this application provide an uplink transmission method, a downlink transmission method, a cooperative transmission method, and an apparatus, which can enable terminal devices to transmit at the same frequency to multiple TPRs deployed at the same frequency. The methods and apparatus are based on the same inventive concept. Since the principles by which the methods and apparatus solve problems are similar, the implementations of the apparatus and methods can be mutually referred to, and repeated details will not be elaborated further.

[0109] In this application embodiment, the time domain / time unit can be a frame, radio frame, system frame, subframe, half-frame, time slot, mini-time slot, symbol, etc. Data can refer to codeword, transport block, code block, or code block group.

[0110] It should be understood that in the embodiments of this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. 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, or c can represent: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0111] In addition, it should be understood that in the description of this application, the words "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, order, or number.

[0112] The method provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0113] Example 1: See Figure 4 This is a flowchart illustrating an uplink transmission method provided in this application. This method can be applied to communication devices, chips, or chipsets, etc. The following description uses a communication device as an example. The method includes:

[0114] S401, the base station configures multiple serving cells to the terminal equipment, and the multiple serving cells have at least one of the following relationships: the operating frequency band is exactly the same, or the operating frequency band is partially the same.

[0115] These multiple serving cells can belong to different TRPs. The physical identifiers of the multiple serving cells can be the same or different.

[0116] For example, a base station can configure five serving cells for a terminal device. These five serving cells share the same center frequency and bandwidth; therefore, they can be considered related. Alternatively, these five serving cells may share the same center frequency but have different bandwidths, resulting in some overlap in their operating frequency bands; in this case, they can also be considered related. Or, these five serving cells may not share the same center frequency and bandwidth, but their operating frequency bands may overlap; in this case, they can still be considered related.

[0117] S402, the base station indicates to the terminal device that multiple serving cells have at least one of the following relationships: they operate in the same frequency band, or they partially operate in the same frequency band. Accordingly, the terminal device can determine multiple serving cells under the instruction of the base station.

[0118] It should be noted that the configuration of multiple serving cells in S401 and the indication of the association relationship in S402 can be sent together or separately. That is, S401 and S402 can be separate steps or the same communication step.

[0119] In one implementation, the base station can send indication information to the terminal device, which indicates that multiple serving cells have at least one of the following relationships: they operate in the same frequency band or partially in the same frequency band. Accordingly, the terminal device can determine the multiple serving cells based on the indication information.

[0120] In some embodiments, the indication information can be carried in the configuration information of the serving cell and sent to the terminal device. For example, the base station configures N serving cells to the terminal device and carries indication information in the configuration information of serving cell 1. This indication information is used to indicate that serving cells 2 to N are associated with serving cell 1. As another example, the base station configures N serving cells to the terminal device and carries indication information in the configuration information of each of serving cells 2 to N. The indication information carried in the configuration information of each of serving cells 2 to N is used to indicate that the serving cell is associated with serving cell 1.

[0121] In other embodiments, the base station may also configure a list of associated serving cells to the terminal device. This can be understood as the base station sending configuration information to the terminal device, which indicates that multiple serving cells are associated. For example, the base station may send the list shown in Table 1 to the terminal device.

[0122] Table 1

[0123] Service Community Related communities X1 X2, X2, X3 Y2 Y1, Y3, Y4, Y5 …… ……

[0124] Table 1 indicates that cells X2, X3, and X4 are associated with X1, and cells Y1, Y3, Y4, and Y5 are associated with Y2. Therefore, the terminal device can determine the associated relationships between X1 to X4 and Y1 to Y5 based on Table 1.

[0125] In one example, the serving cell may be identified in the indication information using the serving cell number or the serving cell physical number, etc.

[0126] In another implementation, the base station can indicate multiple serving cells to the terminal device through configuration information. Therefore, the terminal device can determine multiple serving cells based on the configuration information of the multiple serving cells from the base station.

[0127] In one exemplary embodiment, the base station can indicate the multiple serving cells through the frequency domain configuration information of each serving cell.

[0128] In one example, the base station can indicate multiple serving cells through the downlink frequency domain configuration information of each serving cell. For example, the downlink frequency domain configuration information may include, but is not limited to: the absolute radio frequency channel number (ARFCN) value of the SSB, frequency band information indicating which frequency band the serving cell belongs to, the absolute frequency domain location (also known as point A) with the common RB identifier set to 0, bandwidth, carrier position configuration, bandwidth part (BWP) configuration information (such as the starting position of the BWP, bandwidth, etc.), etc.

[0129] For example, a base station can configure the downlink ARFCNs of multiple serving cells to be the same. Therefore, after receiving the configuration information of each serving cell, the terminal device can consider serving cells with the same downlink ARFCN to be related. In this implementation, the base station's act of sending the configuration information of multiple serving cells to the terminal device can be regarded as the base station indicating multiple serving cells to the terminal device. Alternatively, it can be understood that step S402 is not executed; instead, the base station sends the configuration information of multiple serving cells to the terminal device, and the terminal device determines that the multiple cells are related based on the configuration information.

[0130] For example, a base station can configure the downlink frequency domain positions of multiple serving cells to partially overlap in frequency bands through BWP configuration. Therefore, after receiving the configuration information of each serving cell, the terminal device can consider serving cells with overlapping downlink frequency domain positions to be related. For instance, serving cell 1 has downlink configurations BWP1 and BWP2, and serving cell 2 has downlink configuration BWP1, with both BWP1 values ​​being identical. In this case, serving cell 1 and serving cell 2 are related. Similarly, serving cell 1 has downlink configurations BWP1 and BWP2, and serving cell 2 has downlink configurations BWP1 and BWP3, with both BWP1 values ​​being identical. Again, serving cell 1 has downlink configuration BWP1, and serving cell 2 has downlink configuration BWP1, with both BWP1 values ​​being identical. In this case, serving cell 1 and serving cell 2 are related.

[0131] For example, a base station can configure the downlink point A of multiple serving cells to be the same, so that after the terminal device receives the configuration information of each serving cell, serving cells with the same downlink point A can be considered to be related.

[0132] In another example, the base station can indicate the multiple serving cells through the uplink frequency domain configuration information of each serving cell. For example, the uplink frequency domain configuration information may include, but is not limited to: frequency band information indicating which frequency band the uplink of this serving cell is in, point A, carrier position configuration, indication of whether to offset by a preset offset value (such as 7.5Hz, etc.), bandwidth, BWP configuration information (such as the starting position of the BWP, bandwidth, etc.), etc.

[0133] For example, a base station can configure the uplink ARFCN of multiple serving cells to be the same, so that after the terminal device receives the configuration information of each serving cell, the serving cells with the same uplink ARFCN can be considered to be related.

[0134] For example, a base station can configure the uplink frequency domain positions of multiple serving cells to partially overlap in frequency bands through BWP configuration. Therefore, after receiving the configuration information of each serving cell, the terminal device can consider serving cells with overlapping uplink frequency domain positions to be related. For instance, if serving cell 1 has uplink configurations BWP1 and BWP2, and serving cell 2 has uplink configuration BWP1, and both BWP1s are identical, then serving cell 1 and serving cell 2 are related. Similarly, if serving cell 1 has uplink configurations BWP1 and BWP2, and serving cell 2 has uplink configurations BWP1 and BWP3, and both BWP1s are identical, then serving cell 1 and serving cell 2 are related. Again, if serving cell 1 has uplink configuration BWP1, and serving cell 2 has uplink configuration BWP1, and both BWP1s are identical, then serving cell 1 and serving cell 2 are related.

[0135] For example, a base station can configure the uplink point A of multiple serving cells to be the same, so that after the terminal device receives the configuration information of each serving cell, serving cells with the same uplink point A can be considered to be related.

[0136] In one possible implementation, the base station can be configured with multiple serving cells that employ time-division duplexing (TDD). The uplink and downlink of these multiple serving cells in TDD can operate on the same frequency band, thus ensuring that their uplink and downlink frequency domain positions are aligned. Therefore, after receiving the configuration information of the multiple serving cells, the terminal device can determine the association relationship between them when it identifies that the multiple serving cells are in TDD mode.

[0137] In another possible implementation, the base station can configure multiple serving cells to employ frequency division duplexing (FDD), and configure the uplink frequency domain resources of the multiple serving cells to overlap in frequency bands. This overlap can be complete or partial. Since the uplink and downlink of the multiple serving cells operate on different frequency bands under FDD, by configuring the uplink frequency domain resources of these multiple serving cells to overlap in frequency bands, the terminal device, upon receiving the configuration information of the multiple serving cells, can determine that the multiple serving cells are associated when it determines that they are FDD and that their uplink frequency domain resources overlap in frequency bands. In this implementation, the downlink frequency domain resources of the multiple serving cells may or may not overlap in frequency bands.

[0138] Taking complete overlap as an example, a base station can be configured with multiple serving cells that can employ frequency division duplexing (FDD), and the uplink frequency domain configurations of these multiple serving cells are identical. Therefore, after receiving the configuration information of multiple serving cells, the terminal device can determine that these multiple serving cells are associated when it determines that they are FDD and have the same uplink frequency domain configuration. In this implementation, the downlink frequency domain configurations of the multiple serving cells can be the same or different.

[0139] In another possible implementation, the base station can configure multiple serving cells to use FDD (Flexible Distributed Drive) and configure the downlink frequency domain resources of the multiple serving cells to have overlapping frequency bands. This overlap can be complete or partial. The uplink and downlink of the multiple FDD serving cells operate on different frequency bands. By configuring the downlink frequency domain resources of these multiple serving cells to have overlapping frequency bands, the terminal device, upon receiving the configuration information of the multiple serving cells and determining that the multiple serving cells are FDD and have overlapping downlink frequency domain resources, can determine that the multiple serving cells are associated. In this implementation, the uplink frequency domain resources of the multiple serving cells may or may not have overlapping frequency bands.

[0140] Taking complete overlap as an example, a base station can be configured with multiple serving cells that can employ frequency division duplexing (FDD), and the downlink frequency domain configurations of these multiple serving cells are identical. Therefore, after receiving the configuration information of multiple serving cells, the terminal device can determine that these multiple serving cells are associated when it determines that they are FDD and have the same downlink frequency domain configuration. In this implementation, the uplink frequency domain configurations of the multiple serving cells can be the same or different.

[0141] In another exemplary embodiment, the base station can indicate multiple serving cells using the physical cell IDs (PCIs) of each serving cell. For example, the base station configures the physical cell IDs (PCIs) of multiple serving cells to be the same and sends configuration information of multiple serving cells to the terminal device. The PCIs carried in the configuration information of these multiple serving cells are identical. Thus, the terminal device, upon receiving the configuration information of each serving cell, can consider serving cells with the same PCI as related.

[0142] Optionally, when establishing associations between multiple serving cells, a base station can designate one serving cell, with the other associated serving cells configured supplementarily. The designated serving cell can be the cell primarily providing services to the terminal device, while the associated cells can be cells assisting the designated serving cell in providing services to the terminal device. For example, some common parameters can carry configuration information from the designated serving cell, with only some parameters configured in the associated serving cells. Alternatively, common parameters can also be configured in the associated serving cells, but these common parameters may not be effective; the terminal device determines the configuration of the common parameters based on the configuration information of the designated serving cell.

[0143] For example, common parameters may include, but are not limited to, at least one of the following: the location of DMRS type A, the rate matching pattern configuration information, the subcarrier spacing of the SSB, the uplink and downlink frame structure configuration information, the timing advance packet identifier, and the carrier switching configuration information. Among these, the uplink and downlink frame structure configuration information is used to indicate which slots are available for uplink transmission and which slots are available for downlink transmission.

[0144] In addition, the frequency domain configuration information of the serving cell can also be public parameters. In this way, cells that use these public parameters can be associated with each other.

[0145] S403, the terminal device sends uplink signals to multiple serving cells, wherein the transmission of uplink signals meets preset conditions.

[0146] In one exemplary description, the preset conditions may include at least one of the following:

[0147] The total power of the uplink signals from multiple serving cells is ≤ (or <) the maximum transmit power of the terminal device. This can also be understood as the total power of the uplink signals from multiple serving cells being less than or equal to the maximum transmit power of the terminal device. In other words, the total power of the uplink signals from multiple serving cells is not greater than the maximum transmit power of the terminal device. For example, assuming that serving cells 1 to 3 are related, then (the power of the uplink signal of serving cell 1 + the power of the uplink signal of serving cell 2 + the power of the uplink signal of serving cell 3) ≤ the maximum transmit power of the terminal device, or (the power of the uplink signal of serving cell 1 + the power of the uplink signal of serving cell 2 + the power of the uplink signal of serving cell 3) < the maximum transmit power of the terminal device.

[0148] The total uplink power of multiple serving cells is ≤ (or <) the maximum transmit power of the terminal device in the overlapping frequency band. This can also be understood as the total uplink power of multiple serving cells being less than or equal to the maximum transmit power of the terminal device in the overlapping frequency band. In other words, the total uplink power of multiple serving cells is not greater than the maximum transmit power of the terminal device in the overlapping frequency band. The overlapping frequency band is the part where the operating frequency bands of multiple serving cells overlap. For example, assuming that serving cells 1 to 3 are related, then (the uplink power of serving cell 1 + the uplink power of serving cell 2 + the uplink power of serving cell 3) ≤ the maximum transmit power of the terminal device in the overlapping frequency band, or (the uplink power of serving cell 1 + the uplink power of serving cell 2 + the uplink power of serving cell 3) < the maximum transmit power of the terminal device in the overlapping frequency band.

[0149] For any one of multiple serving cells, the uplink signal power of any serving cell is ≤ (or <) the maximum transmit power of the terminal device in that serving cell. This can also be understood as the uplink signal power of any serving cell being less than or equal to the maximum transmit power of the terminal device in that serving cell. In other words, the uplink signal power of any serving cell is not greater than the maximum transmit power of the terminal device in that serving cell. For example, assuming that serving cells 1 to 3 are related, the uplink signal power of serving cell 1 is ≤ (or <) the maximum transmit power of the terminal device in serving cell 1, and the uplink signal power of serving cell 2 is ≤ (or <) the maximum transmit power of the terminal device in serving cell 2, and the uplink signal power of serving cell 3 is ≤ (or <) the maximum transmit power of the terminal device in serving cell 3.

[0150] In one implementation, if the uplink signal transmission by the terminal device fails to meet the preset conditions, the terminal device performs power back-off on the uplink signal power of at least one of the multiple serving cells.

[0151] Power backoff involves multiplying the transmission power of signals with the same priority by a uniform factor (called a scaling factor) to ensure that the resulting power does not exceed the maximum transmit power. If signals have different priorities, the transmission of higher-priority signals is prioritized; that is, higher-priority signals are allocated more power first. The remaining lower-priority signals are then multiplied by a proportional scaling factor to meet the remaining power requirements. Furthermore, when a terminal device performs power backoff on the uplink signal power of at least one serving cell among multiple serving cells, it can do so based on the priorities of the serving cells. For example, the terminal device can perform power backoff on serving cells with a priority lower than a priority threshold. Alternatively, it can perform a first-amplitude power backoff on serving cells with a priority lower than the priority threshold and a second-amplitude power backoff on serving cells with a priority greater than or equal to the priority threshold, where the first amplitude is greater than the second amplitude.

[0152] For example, the terminal device can determine the priority of the serving cell based on the uplink data transmission status. For instance, the serving cell with uplink data to be sent has a higher priority, while the serving cell with no uplink data to be sent has a lower priority.

[0153] Alternatively, the terminal device can determine the priority of a serving cell based on its primary or secondary status. For example, a primary serving cell has a higher priority, while serving cells associated with the primary serving cell have a lower priority.

[0154] In one implementation, the terminal device can determine the transmit power headroom report (PHR) based on the uplink signal power of multiple serving cells. For example, if the base station configures three related serving cells, Pcell, Scell1, and Scell2, for the terminal device, the terminal device can subtract the PUCCH power of Scell1 and the PUCCH power of Scell2 from the maximum power of Pcell when calculating the PHR of Pcell.

[0155] Alternatively, the maximum power of the frequency band (overlapping bands) can be subtracted from the total uplink signal power transmitted by all associated serving cells in that frequency band (such as the power of PUCCH and PUSCH), and the remaining value is the power margin. Here, "subtraction" refers to addition and subtraction of dB values, which is essentially division of linear values.

[0156] In another exemplary embodiment, the preset condition may also be: the uplink signal is transmitted to multiple serving cells in a time-division manner. Time-division means that the time-domain resources of the transmitted uplink signals do not overlap.

[0157] From the perspective of the terminal device, it does not expect to be configured or instructed to simultaneously transmit uplink signals (such as PUCCH) on multiple associated serving cells at overlapping times. From the perspective of the base station, base stations need to coordinate the timing of uplink signal transmission to ensure time-division scheduling on associated serving cells.

[0158] When base stations coordinate the timing of uplink signal transmission, each base station can send uplink scheduling resource information, such as the time domain information occupied by uplink scheduling, to other base stations. Each base station determines the scheduling information it should use based on the uplink scheduling resource information of other base stations. Alternatively, a control device (such as a centralized scheduling base station) can be responsible for allocating the uplink scheduling time domain resources to each base station. After allocating the uplink scheduling time domain resources to each base station, the control device can notify each base station of the available uplink scheduling time domain resources.

[0159] In this embodiment of the application, the base station instructs the terminal device to have multiple associated serving cells, enabling the terminal device to perform joint power control on the multiple associated serving cells, so that the total power of uplink transmission on the same frequency does not exceed the maximum capacity of the terminal device, thereby enabling the terminal device to perform uplink transmission on the same frequency band to multiple serving cells.

[0160] Furthermore, the terminal device can report PHRs for multiple serving cells with related relationships, enabling the base station to perform resource scheduling based on the reported PHRs, thereby improving the accuracy of resource scheduling.

[0161] In some implementations, if the PDSCHs of multiple serving cells partially or completely overlap in the time domain, the multiple serving cells can satisfy at least one of the following conditions when performing downlink transmission:

[0162] Condition 1: At least one of the following must be the same: the actual number of front DMRS symbols of the PDSCH of multiple serving cells, the actual number of additional DMRS symbols of the PDSCH of multiple serving cells, the actual DMRS symbol positions of the PDSCH of multiple serving cells, and the DMRS configuration type of the PDSCH of multiple serving cells.

[0163] Condition 2: The PDSCHs of multiple serving cells are scheduled by different PDCCHs. The PDCCH can indicate the DMRS port, TCI state, etc. of the PDSCH, and the TCI state and DMRS port are associated. If different PDCCHs indicate different TCI states, then the DMRS groups of the PDSCHs scheduled by different PDCCHs are different.

[0164] Condition 3: The BWPs activated by different serving cells should completely overlap, wherein the subcarrier spacing of these BWPs can be the same.

[0165] Condition 4: Different PDSCHs have the same mapping type.

[0166] Condition 5: Different precoding resource block groups (PRGs) have the same granularity and location.

[0167] Condition 6: Different physical resource block groups (RBGs) have the same granularity and location.

[0168] Example 2: See Figure 5 This application provides a flowchart of a downlink transmission method, which can be applied to communication devices, chips, or chipsets. The following description uses a communication device as an example. The method includes:

[0169] S501, the base station configures an SSB for at least one second serving cell.

[0170] In some embodiments, the base station may configure the TRS of the QCL for downlink transmission of the terminal device and configure the SSB of at least one second serving cell based on the TRS, wherein the TRS and the SSB of the second serving cell are quasi-co-located.

[0171] S502, the base station sends configuration information of the first serving cell to the terminal device. The configuration information includes SSB configuration information of at least one second serving cell. The second serving cell and the first serving cell have at least one of the following relationships: they operate in the same frequency band, or their operating frequency bands are partially the same. Accordingly, the terminal device can receive the configuration information of the first serving cell sent by the base station.

[0172] In one implementation, before step S501, the base station may indicate the first serving cell and at least one second serving cell to the terminal device. For details, please refer to the relevant descriptions of S401 and S402 in the above embodiment, which will not be repeated here.

[0173] For example, the first serving cell can be a primary cell (Pcell), and the second serving cell can be a secondary cell. Alternatively, the first serving cell can be the cell currently providing service to the terminal device, and the second serving cell can be a neighboring cell associated with that cell. Alternatively, the first serving cell can also be the primary serving cell configured by the base station, and the second serving cell can be a neighboring cell associated with that primary serving cell. Alternatively, the first serving cell can be any cell, and the second serving cell can be a serving cell associated with that cell.

[0174] For details on the relationships, please refer to the relevant description of the relationships in Embodiment 1 above, which will not be repeated here.

[0175] In one implementation, the SSB configuration information may include the SSB index and cell information. For example, when the base station sends a TCI state to the terminal device, the TCI state may include the SSB index, cell information, QCL type, etc.

[0176] For example, cell information can be a cell number or a PCI. The cell number can be an integer between 0 and 1007.

[0177] In another implementation, the SSB configuration information may further include configuration information for at least one carrier, wherein the second serving cell transmits the SSB on at least one carrier. For example, the base station sends a TCI state to the terminal device, wherein the TCI state may include the SSB index, cell information, QCL type, configuration information for at least one carrier, etc.

[0178] For example, the carrier configuration information may include at least one of the following: frequency domain location information and carrier identifier.

[0179] In another implementation, the configuration information may further include a detection time window (SSB measurement time configuration, SMTC), where the detection time window indicates the time period for detecting the SSB of the first serving cell, or the detection time window indicates the time period for detecting the SSB of the second serving cell. For example, the base station sends a TCI state to the terminal device, where the TCI state may include the SSB index, cell information, QCL type, configuration information of at least one carrier, detection time window, etc.

[0180] Understandably, the TCI state may include the SSB index of the first serving cell, and may also include the SSB index of at least one second serving cell. The TCI state may include cell information of the first serving cell, and may also include cell information of at least one second serving cell. The TCI state may also include the association between the SSB index and the cell information.

[0181] In addition, in one implementation, the configuration information may also include: the time-domain information of the SSB, such as the SSB's period and its location within the burst. The configuration information may also include: the SSB's power configuration, such as the average power of the SSB on each RE, etc.

[0182] S503, the terminal device receives downlink transmissions from the second serving cell based on the SSB configuration information.

[0183] For example, downlink transmissions may include, but are not limited to, at least one of the following signals: a data channel, a CSI-RS channel, or a control channel.

[0184] In one implementation, when the TCI state of the CSI-RS configured by the base station for the terminal device includes an SSB, the base station can also configure power difference information between the CSI-RS and the SSB for the terminal device. If there is no cell information and no serving cell identifier, the power difference can represent the power difference between the CSI-RS and the SSB of the current cell; if there is a serving cell identifier, the power difference can represent the power difference between the CSI-RS and the SSB of the serving cell; if there is cell information, the power difference can represent the power difference between the CSI-RS and the SSB within the cell identified by the cell information.

[0185] Optionally, the terminal device can perform rate matching for SSBs. For example, data may not be mapped at locations where SSBs exist, such as CSI-RS. Locations with SSBs can refer to locations containing SSB symbols, resource units (REs), resource blocks (RBs), etc.

[0186] Furthermore, if there is no cell information and no serving cell identifier, the SSB for rate matching can be the SSB of the current cell; if there is a serving cell identifier, the SSB for rate matching can be the SSB of the serving cell; if there is cell information, the SSB for rate matching can be the SSB within the cell identified by the cell information.

[0187] To better understand Embodiment 2 of this application, the following description is provided in conjunction with a specific scenario.

[0188] Scenario 1: For example Figure 6 As shown, serving cell 1 and serving cell 2 simultaneously provide services to terminal devices on the same frequency band (such as carrier 1), and serving cell 1 transmits SSB1 on carrier 1, while serving cell 2 transmits SSB2 on carrier 1.

[0189] For example, the base station can send the following configuration information to the terminal device:

[0190]

[0191] Here, Serving cell 1{} represents the configuration information configured by the base station for serving cell 1. NZP CSI-RS1with trs-info on represents the base station's configuration information for CSI-RS1. NZP CSI-RS1 with trs-info on is associated with TCIstate1, which includes the SSB1 configuration information for serving cell 1, such as the SSB index and QCL type. Taking QCL type C as an example, TCIstate1 could include: SSB1 with type C.

[0192] The NZP CSI-RS2 with trs-info on configuration information for CSI-RS2 is provided by the base station. NZP CSI-RS2 with trs-info on is associated with TCI state2, which includes the SSB2 configuration information for serving cell 2, such as SSBindex, PCI of serving cell 2, and QCL type. Taking QCL type C as an example, TCI state2 could include: SSB2 with type C, PCI of SSB2.

[0193] Scenario 2: For example Figure 7 As shown, serving cell 1 and serving cell 2 simultaneously provide services to terminal devices on the same frequency band (such as carrier 1 and carrier 2). Serving cell 1 transmits SSB1 on carrier 1, serving cell 2 does not transmit SSB on carrier 1, serving cell 1 transmits SSB3 on carrier 2, and serving cell 2 transmits SSB4 on carrier 2.

[0194] For example, the base station can send the following configuration information to the terminal device:

[0195]

[0196] Here, Serving cell 1{} represents the configuration information configured by the base station for serving cell 1. NZP CSI-RS1with trs-info on represents the base station's configuration information for CSI-RS1. NZP CSI-RS1 with trs-info on is associated with TCIstate1, which includes the SSB1 configuration information for serving cell 1, such as the SSB index and QCL type. Taking QCL type C as an example, TCIstate1 could include: SSB1 with type C.

[0197] The "NZP CSI-RS2 with trs-info on" field contains base station configuration information for CSI-RS2. It is associated with TCI state2, which includes SSB4 configuration information for serving cell 2, such as SSBindex, PCI, QCL type, and carrier 2 configuration information. For example, with QCL type C, TCI state2 might include: SSB4 with type C, PCI of SSB4, and SSB Frequency or reusing SercCellIndex. Here, SSB Frequency or reusing SercCellIndex represents carrier 2 configuration information.

[0198] Serving cell 2{} contains the configuration information configured by the base station for serving cell 2. Among this, NZP CSI-RS3 withtrs-info on contains the base station's configuration information for CSI-RS3. NZP CSI-RS3 with trs-info on is associated with TCIstate3. TCI state3 includes the SSB3 configuration information for serving cell 1, such as the SSB index and QCL type. Taking QCL type C as an example, TCI state3 can include: SSB3 with type C.

[0199] The "NZP CSI-RS4 with trs-info on" field represents the base station's configuration information for CSI-RS4. It is associated with TCI state4, which includes the SSB4 configuration information for serving cell 2, such as the SSBindex, PCI, QCL type, and carrier 2 configuration information. For example, with QCL type C, TCI state4 could include: SSB4 with type C, and PCI of SSB4.

[0200] Scenario 3: For example Figure 8 As shown, serving cell 1 and serving cell 2 provide services to terminal devices on the same frequency band (such as carrier 1 and carrier 2). Serving cell 1 transmits SSB1 on carrier 1, while serving cell 2 does not transmit an SSB on carrier 1. Serving cell 2 transmits SSB4 on carrier 2, while serving cell 1 does not transmit an SSB on carrier 2.

[0201] For example, the base station can send the following configuration information to the terminal device:

[0202]

[0203] Here, Serving cell 1{} represents the configuration information configured by the base station for serving cell 1. NZP CSI-RS1with trs-info on represents the base station's configuration information for CSI-RS1. NZP CSI-RS1 with trs-info on is associated with TCIstate1, which includes the SSB1 configuration information for serving cell 1, such as the SSB index and QCL type. Taking QCL type C as an example, TCIstate1 could include: SSB1 with type C.

[0204] The `NZP CSI-RS2 with trs-info on` directive provides base station configuration information for CSI-RS2. It is associated with TCI state2, which includes SSB4 configuration information for serving cell 2, such as SSBindex, PCI, QCL type, carrier 2 configuration information, and SMTC configuration information. For example, with QCL type C, TCI state2 might include: SSB4 with type C, PCI of SSB4, SSB Frequency, and smtcLike().

[0205] Through Embodiment 2 of this application, the terminal device can receive signals from other serving cells within the current serving cell, track the signals from other serving cells, and then establish a connection between the synchronization signal, tracking signal, and data channel, CSI-RS, or control channel of other cells, thereby enabling more accurate reception of data channels, CSI-RS, or control channels from other cells.

[0206] Example 3: This application provides a method for cooperative transmission, which can be applied to base stations, chips, or chipsets, etc. The following description uses a base station as an example. The method includes:

[0207] The first base station receives first scheduling information from at least one second base station. The first scheduling information is used for scheduling uplink frequency domain resources. Based on the first scheduling information from at least one second base station, the first base station determines its own first scheduling information. The frequency domain resources scheduled by the first base station's own first scheduling information and the frequency domain resources scheduled by the first scheduling information of at least one base station satisfy at least one of the following relationships: the frequency bands are completely identical, or the frequency bands are partially identical.

[0208] Furthermore, the first base station can also receive second scheduling information from at least one base station. This second scheduling information is used for scheduling uplink time-domain resources, and the first base station determines its own second scheduling information based on the second scheduling information from at least one base station. The time-domain resources scheduled by the first base station's own second scheduling information are different from those scheduled by the second scheduling information from at least one base station. For example, after receiving the second scheduling information from the second base station, the first base station can avoid the time-domain resources occupied by the second base station's uplink scheduling.

[0209] In addition, the first base station can also receive third scheduling information from at least one base station, which is used for scheduling downlink transmission resources. Based on the third scheduling information from at least one base station, the first base station determines its own third scheduling information, wherein the CDM group to which the DMRS scheduled by its own third scheduling information belongs is different from the CDM group to which the DMRS scheduled by the second scheduling information of at least one base station belongs.

[0210] In one implementation, the first scheduling information, the second scheduling information, and the third scheduling information can be sent through three separate messages, or they can be sent in a single message. Of course, two of the three scheduling information can be sent in the same message, while the third scheduling information is sent through another message. For example, the first and second scheduling information can be sent in the same message, while the third scheduling information is sent through another message, and so on. These are just a few examples.

[0211] Example 4: This application provides another method for cooperative transmission, which can be applied to base stations, chips, or chipsets, etc. The following description uses a base station as an example. The method includes:

[0212] The control device determines first scheduling information corresponding to at least one base station, the first scheduling information being used for scheduling uplink frequency domain resources, and the frequency domain resources scheduled by the first scheduling information of at least one base station satisfy at least one of the following relationships: the frequency bands are completely identical, or the frequency bands are partially identical; and sends the corresponding first scheduling information to at least one base station. Accordingly, any base station among the at least one base station receives the first scheduling information allocated to it by the control device, and determines the uplink frequency domain resources based on the first scheduling information allocated to it by the control device.

[0213] Furthermore, the control device can also determine second scheduling information corresponding to at least one base station, the second scheduling information being used for uplink time domain resource scheduling, and the time domain resources scheduled by the second scheduling information of at least one base station being different; and send the corresponding second scheduling information to at least one base station respectively. Accordingly, any base station among the at least one base station receives the second scheduling information allocated by the control device for that base station, and determines the uplink time domain resources based on the second scheduling information allocated by the control device for that base station.

[0214] Furthermore, the control device can determine third scheduling information corresponding to at least one base station, which is used for scheduling downlink transmission resources, and the DMRS scheduled by the third scheduling information of at least one base station belongs to a different CDM group; and send the corresponding third scheduling information to at least one base station. Accordingly, any base station among the at least one base station receives the third scheduling information allocated by the control device for that base station, and determines the CDM group to which the downlink scheduled DMRS belongs based on the third scheduling information allocated by the control device for that base station.

[0215] In one implementation, the control device can be a separate device used to allocate resources to each base station.

[0216] In another implementation, the control device can also be a centralized control base station. Furthermore, in this implementation, the first scheduling information, second scheduling information, and third scheduling information of the control device also conform to the above relationships. For example, the frequency domain resources scheduled by the first scheduling information of the control device and the first scheduling information of at least one base station satisfy at least one of the following relationships: the frequency bands are completely identical, or the frequency bands are partially identical; the time domain resources scheduled by the second scheduling information of the control device and the second scheduling information of at least one base station are different; the CDM group to which the DMRS scheduled by the third scheduling information of the control device belongs is different from that of the third scheduling information of at least one base station.

[0217] In some embodiments, the first scheduling information, the second scheduling information, and the third scheduling information sent by the control device to a base station can be sent in three separate messages, or they can be sent in a single message. Of course, two of the first, second, and third scheduling information can be sent in the same message, while the third scheduling information is sent in a separate message. For example, the first and second scheduling information can be sent in the same message, while the third scheduling information is sent in a separate message, and so on. These are just a few examples.

[0218] It is understood that the methods described in the above four embodiments can be implemented independently as a solution, or any two can be combined as a solution. For example, the methods described in Embodiment 1 and Embodiment 2 can be combined as a solution, or the methods described in Embodiment 1 and Embodiment 3 can be combined as a solution, and so on. Alternatively, any three can be combined as a solution. For example, the methods described in Embodiment 1, Embodiment 2, and Embodiment 3 can be combined as a solution, or the methods described in Embodiment 1, Embodiment 2, and Embodiment 4 can be combined as a solution.

[0219] Based on the same technical concept as the method embodiments, this application provides a communication device. The structure of the communication device can be as follows: Figure 9 As shown, it includes a processing module 901 and a transceiver module 902.

[0220] In one implementation, the communication device can specifically be used to implement... Figure 4 In the embodiments, the terminal device executes a method. This device can be the terminal device itself, or a chip or chipset within the terminal device, or a part of a chip used to execute the relevant method function. Specifically, the processing module 901 is used to determine multiple serving cells, which have at least one of the following relationships: identical operating frequency bands, or partially identical operating frequency bands. The transceiver module 902 is used to send uplink signals to the multiple serving cells determined by the processing module 901, wherein the transmission of the uplink signals meets preset conditions.

[0221] In some embodiments, the processing module 901 may be specifically used to: determine multiple serving cells based on indication information from the base station, wherein the indication information is used to indicate that the multiple serving cells have at least one of the following relationships: the operating frequency bands are completely the same, or the operating frequency bands are partially the same.

[0222] In other embodiments, the processing module 901 may also be specifically used to: determine multiple serving cells based on the configuration information of multiple serving cells from the base station.

[0223] For example, the configuration information includes frequency domain configuration information; the frequency domain resources configured in the frequency domain configuration information of multiple serving cells have at least one of the following relationships: partial frequency band overlap, or all frequency bands completely overlap.

[0224] In one exemplary description, the preset conditions may include at least one of the following:

[0225] The total uplink power of multiple serving cells is less than or equal to the maximum transmit power of the terminal device;

[0226] The total uplink power of multiple serving cells is less than or equal to the maximum transmit power of the terminal device in the overlapping frequency band, which is the part where the operating frequency bands of multiple serving cells overlap.

[0227] For any one of the multiple serving cells, the uplink signal power of any serving cell is less than or equal to the maximum transmit power of the terminal device in any serving cell.

[0228] The processing module 901 can also be used to: if the transmission of the uplink signal does not meet the preset conditions before the processing module 901 sends the uplink signal to multiple serving cells, then perform power back-off on the uplink signal power of at least one of the multiple serving cells.

[0229] The processing module 901, when performing power back-off on the uplink signal power of at least one serving cell among multiple serving cells, can specifically be used to: perform power back-off on the uplink signal power of at least one serving cell according to the priority of multiple serving cells.

[0230] The processing module 901 can also be used to: determine the transmit power margin based on the power of the uplink signals of multiple serving cells.

[0231] In another exemplary description, the preset condition may also be: the uplink signal is transmitted to multiple serving cells in a time-division manner.

[0232] In another implementation, the communication device can be specifically used to implement... Figure 4 In the embodiments, the method executed by the base station can be the base station itself, or a chip or chipset in the base station, or a part of the chip used to execute the relevant method function. The transceiver module 902 is used for transmitting and receiving information; the processing module 901 is used to perform: configuring multiple serving cells to the terminal device, wherein the multiple serving cells have at least one of the following relationships: identical operating frequency bands or partially identical operating frequency bands; and instructing the terminal device through the transceiver module 902 that the multiple serving cells have at least one of the following relationships: identical operating frequency bands or partially identical operating frequency bands.

[0233] In some embodiments, when the processing module 901 indicates to the terminal device through the transceiver module 902 that multiple serving cells have at least one of the following relationships: completely identical operating frequency bands or partially identical operating frequency bands, it can specifically be used to: send indication information to the terminal device through the transceiver module 902, the indication information being used to indicate that multiple serving cells have at least one of the following relationships: completely identical operating frequency bands or partially identical operating frequency bands.

[0234] In other embodiments, when the processing module 901 indicates to the terminal device through the transceiver module 902 that multiple serving cells have at least one of the following relationships: completely identical operating frequency bands or partially identical operating frequency bands, it can be specifically used to: indicate to the terminal device through the configuration information of the serving cells that multiple serving cells have at least one of the following relationships: completely identical operating frequency bands or partially identical operating frequency bands.

[0235] For example, the configuration information includes frequency domain configuration information; the frequency domain resources configured in the frequency domain configuration information of multiple serving cells have at least one of the following relationships: partial frequency band overlap, or all frequency bands completely overlap.

[0236] In another implementation, the communication device can be used in the method executed by the base station in Embodiment 3. This device can be the base station itself, or a chip or chipset within the base station, or a part of the chip used to execute the relevant method function. Specifically, the transceiver module 902 is used to receive first scheduling information from at least one base station, the first scheduling information being used for scheduling uplink frequency domain resources; the processing module 901 is used to determine its own first scheduling information based on the first scheduling information from at least one base station received by the transceiver module 902, wherein the frequency domain resources scheduled by its own first scheduling information and the frequency domain resources scheduled by the first scheduling information of at least one base station satisfy at least one of the following relationships: the frequency bands are completely identical, or the frequency bands are partially identical.

[0237] The transceiver module 902 can also be used to: receive second scheduling information from at least one base station, the second scheduling information being used for scheduling uplink time domain resources; the processing module 901 can also be used to: determine its own second scheduling information based on the second scheduling information from at least one base station, wherein the time domain resources scheduled by its own second scheduling information are different from the time domain resources scheduled by the second scheduling information from at least one base station.

[0238] The transceiver module 902 can also be used to: receive third scheduling information from at least one base station, the third scheduling information being used for scheduling downlink transmission resources; the processing module 901 can also be used to: determine its own third scheduling information based on the third scheduling information from at least one base station, wherein the code division multiplexing (CDM) group to which the demodulation reference signal (DMRS) scheduled by its own third scheduling information is located is different from the CDM group to which the DMRS scheduled by the second scheduling information from at least one base station is located.

[0239] In another implementation, the communication device can specifically be used in the method executed by the control device in Embodiment 4. This device can be the control device itself, or a chip or chipset within the control device, or a part of the chip used to execute the relevant method function. Specifically, the processing module 901 is used to determine first scheduling information corresponding to at least one base station. The first scheduling information is used for scheduling uplink frequency domain resources, and the frequency domain resources scheduled by the first scheduling information of at least one base station satisfy at least one of the following relationships: completely identical frequency bands, or partially identical frequency bands. The transceiver module 902 is used to send the corresponding first scheduling information to at least one base station.

[0240] The processing module 901 can also be used to: determine the second scheduling information corresponding to at least one base station, the second scheduling information being used for scheduling uplink time domain resources, and the time domain resources scheduled by the second scheduling information of at least one base station being different; the transceiver module 902 can also be used to: send the corresponding second scheduling information to at least one base station respectively.

[0241] The processing module 901 can also be used to: determine the third scheduling information corresponding to at least one base station, the third scheduling information being used for scheduling downlink transmission resources, and the demodulation reference signal DMRS scheduled by the third scheduling information of at least one base station being in a different code division multiplexing (CDM) group; the transceiver module 902 can also be used to: send the corresponding third scheduling information to at least one base station respectively.

[0242] In another implementation, the communication device can be used in the method executed by the base station in Embodiment 4. This device can be the base station itself, or a chip or chipset within the base station, or a part of the chip used to execute the relevant method function. Specifically, the transceiver module 902 is used to receive first scheduling information allocated by the control device for the first base station. This first scheduling information is used for scheduling uplink frequency domain resources, and the frequency domain resources scheduled by the first scheduling information allocated by the control device for the first base station and the first scheduling information allocated by the control device for at least one second base station satisfy at least one of the following relationships: the frequency bands are completely identical, or the frequency bands are partially identical. The processing module 901 is used to determine the uplink frequency domain resources based on the first scheduling information allocated by the control device for the first base station.

[0243] The transceiver module 902 can also be used to: receive second scheduling information allocated by the control device for the first base station, the second scheduling information being used for scheduling uplink time domain resources, and the second scheduling information allocated by the control device for the second base station being different from the time domain resources scheduled by the second scheduling information allocated by the control device for at least one second base station; the processing module 901 is also used to: determine the uplink time domain resources based on the second scheduling information allocated by the control device for the first base station.

[0244] The transceiver module 902 can also be used to: receive third scheduling information allocated by the control device for the first base station, the third scheduling information being used for scheduling uplink transmission resources, and the third scheduling information allocated by the control device for the second base station being different from the code division multiplexing (CDM) group in which the demodulation reference signal (DMRS) scheduled by the third scheduling information allocated by the control device for at least one second base station is located; the processing module 901 is also used to: determine the CDM group in which the downlink scheduled DMRS is located based on the third scheduling information allocated by the control device for the first base station.

[0245] In another implementation, the communication device can be used specifically for the method executed by the terminal device in Embodiment 2. This device can be the terminal device itself, or a chip or chipset within the terminal device, or a part of the chip used to execute the relevant method function. Specifically, the transceiver module 902 is used for transmitting and receiving information; the processing module 901 is used to perform the following through the transceiver module 902: receiving configuration information from a first serving cell of the base station, the configuration information including at least one Synchronization Signal Block (SSB) configuration information of a second serving cell, the second serving cell and the first serving cell having at least one of the following relationships: identical operating frequency bands, or partially identical operating frequency bands; and receiving downlink transmissions from the second serving cell based on the SSB configuration information.

[0246] For example, the Synchronization Signal Block (SSB) configuration information may include the SSB index and the cell identifier.

[0247] The configuration information may also include: configuration information for at least one carrier, wherein the second serving cell transmits an SSB on at least one carrier.

[0248] The carrier configuration information may include at least one of the following: frequency domain location information and carrier identifier.

[0249] The configuration information may also include: a detection time window, wherein the detection time window is used to indicate the time period for detecting the SSB of the first serving cell, or the detection time window is used to indicate the time period for detecting the SSB of the second serving cell.

[0250] In another implementation, the communication device can be used in the method executed by the base station in Embodiment 2. This device can be the base station itself, or a chip or chipset within the base station, or a part of the chip used to execute the relevant method functions. Specifically, the processing module 901 is used to configure a Synchronization Signal Block (SSB) for at least one second serving cell; the transceiver module 902 is used to send configuration information of the first serving cell to the terminal device. The configuration information includes SSB configuration information of at least one second serving cell. The second serving cell and the first serving cell have at least one of the following relationships: identical operating frequency bands, or partially identical operating frequency bands.

[0251] For example, the Synchronization Signal Block (SSB) configuration information includes the SSB index and the cell identifier.

[0252] The configuration information may also include: configuration information for at least one carrier, wherein the second serving cell transmits an SSB on at least one carrier.

[0253] The carrier configuration information may include at least one of the following: frequency domain location information and carrier identifier.

[0254] The configuration information may also include: a detection time window, wherein the detection time window is used to indicate the time period for detecting the SSB of the first serving cell, or the detection time window is used to indicate the time period for detecting the SSB of the second serving cell.

[0255] In some embodiments, the processing module 901 may be specifically used to: configure a quasi-co-located tracking reference signal for downlink transmission of the terminal device; and configure at least one SSB of a second serving cell based on the tracking reference signal, wherein the tracking reference signal and the SSB of the second serving cell are quasi-co-located.

[0256] The module division in this application embodiment is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of this application can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules. It is understood that the functions or implementations of the modules in the embodiments of this application can be further described in the relevant descriptions of the method embodiments.

[0257] In one possible approach, the communication device can be as follows: Figure 10 As shown, the communication device can be a communication equipment or a chip within a communication equipment. The communication equipment can be a terminal device or a network device. The device may include a processor 1001, a communication interface 1002, and optionally, a memory 1003. The processing module 901 can be the processor 1001. The transceiver module 902 can be the communication interface 1002.

[0258] The processor 1001 can be a central processing unit (CPU), a digital processing module, etc. The communication interface 1002 can be a transceiver, an interface circuit such as a transceiver circuit, or a transceiver chip, etc. The device also includes a memory 1003 for storing the program executed by the processor 1001. The memory 1003 can be non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or it can be volatile memory, such as random-access memory (RAM). The memory 1003 can be any other medium capable of carrying or storing desired program code in the form of instructions or data structures, accessible by a computer, but is not limited to these.

[0259] The processor 1001 is used to execute the program code stored in the memory 1003, specifically to perform the actions of the aforementioned processing module 901, which will not be described in detail here. The communication interface 1002 is specifically used to perform the actions of the aforementioned transceiver module 902, which will not be described in detail here.

[0260] This application embodiment does not limit the specific connection medium between the communication interface 1002, processor 1001, and memory 1003. This application embodiment... Figure 10 The memory 1003, processor 1001, and communication interface 1002 are connected via a bus 1004. Figure 10 The connections between other components are shown in bold and are for illustrative purposes only, not as limiting information. The bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, Figure 10 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0261] This invention also provides a computer-readable storage medium for storing computer software instructions required to execute the processor, including a program required to execute the processor.

[0262] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of 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. 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 that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., SSD), etc.

[0263] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0264] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0265] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0266] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method of uplink transmission, the method comprising: The method comprises: determining a plurality of serving cells having at least one of the following association relationships: complete same working frequency bands, partially same working frequency bands; sending uplink signals to the plurality of serving cells, wherein the sending of the uplink signals meets a preset condition; before sending the uplink signals to the plurality of serving cells, the method further comprises: if the sending of the uplink signals does not meet the preset condition, performing power backoff on the power of the uplink signals of at least one of the plurality of serving cells.

2. The method of claim 1, wherein, determining a plurality of serving cells comprises: determining the plurality of serving cells according to indication information from a base station, the indication information being used to indicate that the plurality of serving cells have at least one of the following association relationships: complete same working frequency bands, partially same working frequency bands.

3. The method of claim 1, wherein, determining a plurality of serving cells comprises: determining the plurality of serving cells according to configuration information of the plurality of serving cells from a base station.

4. The method of claim 3, wherein, The configuration information comprises frequency domain configuration information; the frequency domain resources configured by the frequency domain configuration information of the plurality of serving cells have at least one of the following relationships: partially overlapping frequency bands, completely overlapping all frequency bands.

5. The method according to any one of claims 1 to 4, characterized in that, The preset condition comprises at least one of: the total power of the uplink signals of the plurality of serving cells is less than or equal to the maximum transmission power of a terminal device; the total power of the uplink signals of the plurality of serving cells is less than or equal to the maximum transmission power of the terminal device in overlapping frequency bands, the overlapping frequency bands being the part of the working frequency bands of the plurality of serving cells that overlap; for any one of the plurality of serving cells, the power of the uplink signals of the any one is less than or equal to the maximum transmission power of a terminal device in the any one.

6. The method of claim 1, wherein, performing power backoff on the power of the uplink signals of at least one of the plurality of serving cells comprises: performing power backoff on the power of the uplink signals of the at least one according to the priority of the plurality of serving cells.

7. The method of claim 1, wherein, The method further comprises: determining a transmission power margin based on the power of the uplink signals of the plurality of serving cells.

8. The method according to any one of claims 1 to 4, wherein The preset condition is: the sending of the uplink signals is sent to the plurality of serving cells in a time-division manner.

9. An apparatus for uplink transmission, the apparatus comprising: The apparatus comprises: a processing module configured to determine a plurality of serving cells having at least one of the following association relationships: complete same working frequency bands, partially same working frequency bands; a transceiver configured to send uplink signals to the plurality of serving cells determined by the processing module, wherein the sending of the uplink signals meets a preset condition; the processing module is further configured to, before the transceiver sends the uplink signals to the plurality of serving cells, if the sending of the uplink signals does not meet the preset condition, perform power backoff on the power of the uplink signals of at least one of the plurality of serving cells.

10. The apparatus of claim 9, wherein, The processing module is specifically configured to: determine the plurality of serving cells according to indication information from a base station, the indication information being used to indicate that the plurality of serving cells have at least one of the following association relationships: complete same working frequency bands, partially same working frequency bands.

11. The apparatus of claim 9, wherein, The processing module is specifically configured to: Determine the plurality of serving cells according to configuration information of the plurality of serving cells from a base station.

12. The apparatus of claim 11, wherein, The configuration information comprises frequency domain configuration information. Frequency domain resources configured by the frequency domain configuration information of the plurality of serving cells have at least one of the following relationships: partial frequency band overlap, and complete overlap of all frequency bands.

13. The apparatus of any one of claims 9 to 12, wherein, The preset condition comprises at least one of the following: Total power of uplink signals of the plurality of serving cells is less than or equal to maximum transmit power of a terminal device. Total power of uplink signals of the plurality of serving cells is less than or equal to maximum transmit power of the terminal device in overlapping frequency bands, the overlapping frequency bands being a part of working frequency bands of the plurality of serving cells. For any one of the plurality of serving cells, power of uplink signals of the any one of the plurality of serving cells is less than or equal to maximum transmit power of a terminal device in the any one of the plurality of serving cells.

14. The apparatus of claim 13, wherein, When performing power backoff on power of uplink signals of at least one of the plurality of serving cells, the processing module is specifically configured to: Perform power backoff on power of uplink signals of the at least one of the plurality of serving cells according to priorities of the plurality of serving cells.

15. The apparatus of claim 9, wherein, The processing module is further configured to: Determine transmit power headroom based on power of uplink signals of the plurality of serving cells.

16. The apparatus of any one of claims 9 to 12, wherein, The preset condition is: The sending of the uplink signals is performed in a time-division manner to the plurality of serving cells.

17. A computer readable storage medium characterized by: The computer readable storage medium stores programs or instructions, which, when read and executed by one or more processors, can implement the method of any one of claims 1 to 8.

18. A computer program product, characterised in that, When the computer program product runs on a terminal device, the terminal device is caused to perform the method of any one of claims 1 to 8.

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