Communication method and device

Abstract

The embodiment of the invention provides a communication method and device, belongs to the technical field of communication, and is used for improving the system capacity. In the method, a network device can pre-configure a mapping relationship between a pilot frequency sequence and a sending beam for a terminal device, and the terminal device can determine a first sending beam of a downlink channel corresponding to a first pilot frequency sequence according to the mapping relationship and the first pilot frequency sequence corresponding to a received pilot frequency signal. Therefore, the subsequent terminal equipment can determine the corresponding receiving beam according to the first sending beam, so that the downlink channel can be received more quickly by using the newly matched receiving beam, and the system capacity and the user experience can be improved.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to a communication method and apparatus. Background Art

[0002] Currently, different beams can transmit data for the same user at different times. The network device can indicate the transmission beam information of the physical downlink shared channel (PDSCH) scheduled by the current physical downlink control channel (PDCCH) to the terminal device through the transmission configuration indicator (TCI) of the downlink control information (DCI).

[0003] However, the blind detection of DCI by the terminal device requires a certain duration (timeDuration), which may result in the receiving beam used by the terminal device when receiving the PDSCH data on the first few symbols in the current time slot not necessarily being the most appropriate, thus affecting the system capacity. Summary of the Invention

[0004] Embodiments of this application provide a communication method and apparatus to improve the system capacity.

[0005] To achieve the above objective, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, a communication method is provided. This method can be executed by a terminal device, or by a module (such as a processor, a chip, or a chip system, etc.) applied to the terminal device, or by a logical node, a logical module, or software that can implement all or part of the functions of the terminal device. For ease of description, hereinafter, this method will be described by taking the execution by the terminal device as an example. The method includes: receiving configuration information from a network device, receiving a pilot signal from the network device, and determining a first transmission beam of a downlink channel according to the configuration information and a first pilot sequence. The configuration information is used to indicate the mapping relationship between the pilot sequence and the transmission beam; the pilot signal corresponds to the first pilot sequence, and the pilot sequence includes the first pilot sequence.

[0007] Based on the method described in the first aspect, it can be known that the terminal device can receive the mapping relationship between the pilot sequence and the transmission beam preconfigured by the network device, and determine the first transmission beam of the downlink channel corresponding to the first pilot sequence corresponding to the received pilot signal according to this mapping relationship, so that subsequently the terminal device can determine the corresponding receiving beam (such as the following first receiving beam) according to the first transmission beam, so as to realize receiving the downlink channel with the newly matched receiving beam more quickly, thereby improving the system capacity and the user experience.

[0008] In a possible design solution, the mapping relationship includes: the mapping relationship between the pilot sequence and the transmission configuration indication (TCI), or the mapping relationship between the pilot sequence and the pilot resource, so that subsequently the terminal device can quickly determine the first transmission beam of the downlink channel according to the TCI corresponding to the pilot sequence, or the pilot resource.

[0009] In a possible design solution, the pilot sequence is characterized by different scrambling identifiers, or by different parameter values of the sequence expression, to meet the requirements of different scenarios, without limitation.

[0010] In a possible design solution, the pilot resource is the pilot resource configured by the network device for the terminal device, or the pilot resource corresponding to the pilot resource indication reported by the terminal device.

[0011] It can be understood that if the pilot resource is the pilot resource configured by the network device for the terminal device, then the pilot resource can be the pilot resource in the set of pilot resources configured by the network device for the terminal device, and the mapping relationship between multiple groups of pilot sequences and pilot resources can be configured simultaneously; if the pilot resource is the pilot resource corresponding to the pilot resource indication reported by the terminal device, then the pilot resource can be a specific number of pilot resources selected by the terminal device, and the network device only needs to configure the corresponding pilot sequence for the specific number of pilot resources. In this way, the number of pilot sequences can be reduced, thereby reducing the complexity of the subsequent correlation detection of the pilot sequence by the terminal device and saving overhead.

[0012] In a possible design solution, before determining the transmission beam of the downlink channel according to the configuration information and the first pilot sequence, the method described in the first aspect further includes: determining the first pilot sequence by performing correlation detection of the pilot sequence on the pilot signal. Among them, the first pilot sequence can be the pilot sequence with the largest autocorrelation peak after sequence correlation with the pilot sequence of the pilot signal among the multiple pilot sequences configured by the network. In this way, the terminal device can accurately determine the first pilot sequence among the configured multiple pilot sequences for subsequent determination of the first transmission beam.

[0013] In a possible design solution, determining a first transmission beam of a downlink channel according to configuration information and a first pilot sequence includes: before demodulating downlink control information (DCI), determining the first transmission beam of the downlink channel according to the configuration information and the first pilot sequence. That is, before the terminal device completes DCI decoding or demodulation, it can determine the first transmission beam according to the configuration information and the first pilot sequence, so as to more quickly receive the downlink channel using a matching receiving beam, improving user performance and user experience.

[0014] In a possible design solution, the method described in the first aspect further includes: determining a first receiving beam of the downlink channel according to the first transmission beam, and using the first receiving beam to receive a downlink data channel or a downlink control channel. That is, the terminal device can determine the corresponding first receiving beam according to the pre-determined first transmission beam, so that the terminal device can use the newly matched first receiving beam to receive subsequent downlink data channels or downlink control channels, thereby improving the efficiency and accuracy of communication.

[0015] Optionally, using the first receiving beam to receive a downlink data channel or a downlink control channel includes: receiving the downlink data channel or the downlink control channel using the first receiving beam on a symbol after a symbol interval from the last symbol carrying a pilot signal is greater than or equal to X symbols. Here, X is an integer greater than or equal to 0. Optionally, the X symbols are the time required for correlation detection of the pilot sequence and / or beam switching.

[0016] It can be understood that if the time required for the terminal device to perform correlation detection of the pilot sequence and / or beam switching is very short, it can be considered that X is almost equal to 0. In this way, zero-delay beam switching between PDCCH and PDSCH can be achieved. That is, the terminal device can use the newly matched first receiving beam to receive the downlink data channel or the downlink control channel on a symbol adjacent to the last symbol carrying the pilot signal; if the time required for the terminal device to perform correlation detection of the pilot sequence and / or beam switching is certain, it can be considered that X is greater than 0. In this case, the terminal device can receive the downlink data channel or the downlink control channel using the first receiving beam on a symbol after a symbol interval from the last symbol carrying the pilot signal is greater than or equal to X symbols. It can be understood that the X symbols are shorter than the time required for the terminal device to blindly detect DCI, so as to reduce the time when the terminal device does not receive PDSCH data using the most suitable receiving beam, thereby improving system capacity and user experience.

[0017] In a possible design, the pilot resources include at least one of the following: channel state information reference signal (CSI-RS) resources, synchronization signal block (SSB) resources, tracking reference signal (TRS) resources, phase noise tracking reference signal (PT-RS) resources, demodulation reference signal (DMRS) resources, or sounding reference signal (SRS) resources. That is, existing pilot resources are reused to reduce the implementation difficulty, or new pilot resources can also be used to improve the implementation flexibility, without limitation.

[0018] In a possible design, the configuration information is carried in at least one of the following: Radio Resource Control (RRC) signaling, Medium Access Control - Control Element (MAC-CE) signaling, or Downlink Control Information (DCI). That is, it is carried in existing signaling elements to reduce the implementation difficulty, or it can also be carried in new signaling elements to improve the implementation flexibility, without limitation.

[0019] In a second aspect, a communication method is provided. This method can be executed by a network device, or by a module applied to the network device (such as a processor, a chip, or a chip system, etc.), or can also be implemented by a logical node, a logical module, or software that can implement all or part of the functions of the network device. For ease of description, the following takes the case where this method is executed by the network device as an example for introduction. The method includes: The network device sends configuration information to the terminal device and sends a pilot signal to the terminal device. Among them, the configuration information is used to indicate the mapping relationship between the pilot sequence and the transmission beam; the pilot signal corresponds to a first pilot sequence, and the pilot sequence includes the first pilot sequence.

[0020] In a possible design, the mapping relationship includes: the mapping relationship between the pilot sequence and the Transmission Configuration Indicator (TCI), or the mapping relationship between the pilot sequence and the pilot resources.

[0021] In a possible design, the pilot resources are the pilot resources configured by the network device for the terminal device, or the pilot resources corresponding to the pilot resource indication reported by the terminal device.

[0022] In a possible design, the method described in the second aspect further includes: The network device uses the first transmission beam of the downlink channel to send a downlink data channel or a downlink control channel to the terminal device. Among them, the transmission beam includes the first transmission beam. That is, the network device uses a new first transmission beam to send the downlink data channel or the downlink control channel, and the terminal device can use the first reception beam corresponding to the first transmission beam to receive the downlink data channel or the downlink control channel, so as to realize communication between the network device and the terminal device.

[0023] In a possible design, the pilot resources include at least one of the following: Channel State Information Reference Signal (CSI-RS) resources, Synchronization Signal Block (SSB) resources, Tracking Reference Signal (TRS) resources, Phase Noise Tracking Reference Signal (PT-RS) resources, Demodulation Reference Signal (DMRS) resources, or Sounding Reference Signal (SRS) resources.

[0024] In a possible design, the configuration information is carried in at least one of the following: Radio Resource Control (RRC) signaling, Medium Access Control - Control Element (MAC-CE) signaling, or Downlink Control Information (DCI).

[0025] In addition, for other technical effects of the method described in the second aspect, reference can be made to the technical effects of the method described in the first aspect, which will not be elaborated here.

[0026] In a third aspect, a communication device is provided. The device includes: a module for performing the method described in the first aspect. For example, a transceiver module and a processing module.

[0027] Among them, the transceiver module is used to receive configuration information from a network device and receive a pilot signal from the network device. The processing module is used to determine a first transmission beam of a downlink channel according to the configuration information and a first pilot sequence. Wherein, the configuration information is used to indicate the mapping relationship between the pilot sequence and the transmission beam; the pilot signal corresponds to the first pilot sequence, and the pilot sequence includes the first pilot sequence.

[0028] In a possible design, the mapping relationship includes: the mapping relationship between the pilot sequence and the Transmission Configuration Indicator (TCI), or the mapping relationship between the pilot sequence and the pilot resources.

[0029] In a possible design, the pilot sequence is characterized by different scrambling identifiers, or by different parameter values of the sequence expression.

[0030] In a possible design, the pilot resources are pilot resources configured by the network device for the terminal device, or pilot resources corresponding to the pilot resource indication reported by the terminal device.

[0031] In a possible design, before determining the first transmission beam of the downlink channel according to the configuration information and the first pilot sequence, the processing module is further used to determine the first pilot sequence by performing correlation detection of the pilot sequence on the pilot signal.

[0032] In a possible design, the processing module is further used to determine the first transmission beam of the downlink channel according to the configuration information and the first pilot sequence before demodulating the Downlink Control Information (DCI).

[0033] In a possible design, the processing module is further configured to determine a first receiving beam of a downlink channel according to the first transmitting beam, and receive a downlink data channel or a downlink control channel by using the first receiving beam.

[0034] Optionally, the processing module is further configured to receive a downlink data channel or a downlink control channel by using the first receiving beam on a symbol after the symbol interval between the last symbol carrying a pilot signal and the current symbol is greater than or equal to X symbols, where X is an integer greater than or equal to 0.

[0035] Optionally, the X symbols are the time required for performing correlation detection of a pilot sequence and / or beam switching.

[0036] In a possible design, the pilot resources include at least one of the following: channel state information reference signal (CSI-RS) resources, synchronization signal block (SSB) resources, tracking reference signal (TRS) resources, phase noise tracking reference signal (PT-RS) resources, demodulation reference signal (DMRS) resources, or sounding reference signal (SRS) resources.

[0037] In a possible design, the configuration information is carried on at least one of the following: radio resource control (RRC) signaling, media access control - control element (MAC-CE) signaling, or downlink control information (DCI).

[0038] Optionally, the transceiver module may include a transmitting module and a receiving module. The transmitting module is configured to implement the transmitting function of the communication device described in the third aspect, and the receiving module is configured to implement the receiving function of the communication device described in the third aspect.

[0039] Optionally, the communication device described in the third aspect may further include a storage module that stores programs or instructions. When the processing module executes the programs or instructions, the communication device can execute the communication method described in the first aspect.

[0040] It should be noted that the communication device described in the third aspect may be a terminal device, or a chip (system) or other components or assemblies in the terminal device, or a device including the terminal device. The present application does not make any limitation thereto.

[0041] In addition, the technical effects of the communication device described in the third aspect may refer to the technical effects of the communication method described in the first aspect, which will not be elaborated herein.

[0042] Fourth aspect, a communication device is provided. The communication device includes a module for executing the method described in the second aspect, for example, a transceiver module and a processing module.

[0043] Among them, the transceiver module is used to send configuration information to the terminal device and send a pilot signal to the terminal device. The configuration information is used to indicate the mapping relationship between the pilot sequence and the transmission beam; the pilot signal corresponds to a first pilot sequence, and the pilot sequence includes the first pilot sequence.

[0044] In a possible design, the mapping relationship includes: the mapping relationship between the pilot sequence and the transmission configuration indication (TCI), or the mapping relationship between the pilot sequence and the pilot resource.

[0045] In a possible design, the pilot resource is the pilot resource configured by the network device for the terminal device, or the pilot resource corresponding to the pilot resource indication reported by the terminal device.

[0046] In a possible design, the processing module is used to send a downlink data channel or a downlink control channel to the terminal device by using the first transmission beam of the downlink channel. The transmission beam includes the first transmission beam.

[0047] In a possible design, the pilot resource includes at least one of the following: channel state information reference signal (CSI-RS) resource, synchronization signal block (SSB) resource, tracking reference signal (TRS) resource, phase noise tracking reference signal (PT-RS) resource, demodulation reference signal (DMRS) resource, or sounding reference signal (SRS) resource.

[0048] In a possible design, the configuration information is carried on at least one of the following: Radio Resource Control (RRC) signaling, Medium Access Control - Control Element (MAC-CE) signaling, or Downlink Control Information (DCI).

[0049] Optionally, the transceiver module may include a sending module and a receiving module. The sending module is used to implement the sending function of the communication device described in the fourth aspect, and the receiving module is used to implement the receiving function of the communication device described in the fourth aspect.

[0050] Optionally, the transceiver module may include a sending module and a receiving module. The sending module is used to implement the sending function of the communication device described in the fourth aspect, and the receiving module is used to implement the receiving function of the communication device described in the fourth aspect.

[0051] Optionally, the communication device described in the fourth aspect may further include a storage module that stores programs or instructions. When the processing module executes the programs or instructions, the communication device can execute the method described in the second aspect.

[0052] It can be understood that the communication device described in the fourth aspect may be a network device, or a chip (system) or other components or assemblies in the network device, or a device including the network device. This application does not make any limitations in this regard.

[0053] In addition, for the technical effects of the communication device described in the fourth aspect, reference may be made to the technical effects of the method described in the second aspect, which will not be elaborated here.

[0054] Fifth aspect, a communication device is provided. The communication device includes: a processor configured to execute the communication method described in the first aspect or the second aspect.

[0055] In a possible design, the communication device described in the fifth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the fifth aspect to communicate with other communication devices.

[0056] In a possible design, the communication device described in the fifth aspect may further include a memory. The memory may be integrated with the processor or may be separately provided. The memory may be used to store the computer program and / or data involved in the communication method described in the first aspect or the second aspect.

[0057] In the embodiments of the present application, the communication device described in the fifth aspect may be the network device described in any one of the first aspect or the second aspect, or a chip (system) or other component or assembly in the network device, or a device including the network device; or, the communication device may be the terminal device described in any one of the first aspect or the second aspect, or a chip (system) or other component or assembly in the terminal device, or a device including the terminal device.

[0058] In addition, for the technical effects of the communication device described in the fifth aspect, reference may be made to the technical effects of the communication method described in the first aspect or the second aspect, which will not be elaborated here.

[0059] Sixth aspect, a communication device is provided. The communication device includes: a processor coupled to a memory, the processor being configured to execute a computer program stored in the memory so that the communication device executes the communication method described in the first aspect or the second aspect.

[0060] In a possible design, the communication device described in the sixth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the sixth aspect to communicate with other communication devices.

[0061] In the embodiments of the present application, the communication device described in the sixth aspect may be the network device described in any one of the first aspect or the second aspect, or a chip (system) or other component or assembly in the network device, or a device including the network device; or, the communication device may be the terminal device described in any one of the first aspect or the second aspect, or a chip (system) or other component or assembly in the terminal device, or a device including the terminal device.

[0062] In addition, the technical effects of the communication device described in the sixth aspect may refer to the technical effects of the communication method described in the first aspect or the second aspect, which will not be elaborated here.

[0063] In a seventh aspect, a communication device is provided, including: a processor and a memory; the memory is used to store a computer program, and when the processor executes the computer program, the communication device is caused to execute the communication method described in the first aspect or the second aspect.

[0064] In a possible design, the communication device described in the seventh aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the seventh aspect to communicate with other communication devices.

[0065] In the embodiments of the present application, the communication device described in the seventh aspect may be the network device described in any one of the first aspect or the second aspect, or a chip (system) or other component or assembly in the network device, or a device including the network device; or, the communication device may be the terminal device described in any one of the first aspect or the second aspect, or a chip (system) or other component or assembly in the terminal device, or a device including the terminal device.

[0066] In addition, the technical effects of the communication device described in the seventh aspect may refer to the technical effects of the communication method described in the first aspect or the second aspect, which will not be elaborated here.

[0067] In an eighth aspect, a communication device is provided, including: a processor; the processor is used to be coupled with a memory, and after reading the computer program in the memory, execute the communication method described in the first aspect or the second aspect according to the computer program.

[0068] In a possible design, the communication device described in the eighth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device described in the eighth aspect to communicate with other communication devices.

[0069] In an embodiment of the present application, the communication device described in the eighth aspect may be the network device described in any one of the first aspect or the second aspect, or a chip (system) or other component or assembly in the network device, or a device including the network device; alternatively, the communication device may be the terminal device described in any one of the first aspect or the second aspect, or a chip (system) or other component or assembly in the terminal device, or a device including the terminal device.

[0070] In addition, the technical effects of the communication device described in the eighth aspect may refer to the technical effects of the communication method described in the first aspect or the second aspect, which will not be elaborated herein.

[0071] In a ninth aspect, a communication system is provided. The communication system includes the terminal device described in the above aspects and the network device described in the above aspects.

[0072] In a tenth aspect, a computer-readable storage medium is provided, including: a computer program or instruction; when the computer program or instruction runs on a computer, the computer is caused to execute the communication method described in the first aspect or the second aspect.

[0073] In an eleventh aspect, a computer program product is provided, including a computer program or instruction, which when running on a computer, causes the computer to execute the communication method described in the first aspect or the second aspect. Description of the Drawings

[0074] Figure 1 It is a schematic structural diagram of a MAC CE signaling for activating TCI;

[0075] Figure 2 It is a schematic diagram of the network device provided by an embodiment of the present application serving a UE Figure 1 ;

[0076] Figure 3 It is a schematic diagram of the network device provided by an embodiment of the present application serving a UE Figure 2 ;

[0077] Figure 4 It is a schematic diagram of the architecture of the communication system provided by an embodiment of the present application Figure 1 ;

[0078] Figure 5 It is a schematic diagram of the architecture of the communication system provided by an embodiment of the present application Figure 2 ;

[0079] Figure 6 It is a schematic flowchart of the communication method provided by an embodiment of the present application;

[0080] Figure 7Schematic diagram of a network device provided by an embodiment of the present application to provide services for a UE Figure 3 ;

[0081] Figure 8 Schematic diagram of a network device provided by an embodiment of the present application to provide services for a UE Figure 4 ;

[0082] Figure 9 Structural schematic diagram of a communication device provided by an embodiment of the present application Figure 1 ;

[0083] Figure 10 Structural schematic diagram of a communication device provided by an embodiment of the present application Figure 2 。 Detailed implementation manners

[0084] For ease of understanding, the technical terms involved in the embodiments of the present application will be introduced first below.

[0085] 1. Beam

[0086] A beam is a communication resource, which refers to a special transmission or reception effect with directivity formed by the transmitter or receiver of a network device or a terminal device through an antenna array, similar to the beam of light converged by a flashlight in one direction. By sending and receiving signals in the form of beams, the transmission distance of the signals can be effectively increased.

[0087] The manifestation of a beam in the new radio (NR) protocol can be: spatial domain filter, spatial filter, spatial domain parameter, spatial parameter, spatial domain setting, spatial setting, quasi-colocated (QCL) information, QCL hypothesis, QCL indication, etc.

[0088] The beam can be indicated by a transmission configuration index (TCI) state parameter or by a spatial relation parameter. Therefore, in the embodiments of this application, the beam can be replaced with an airspace filter, a spatial filter, an airspace parameter, a spatial parameter, an airspace setting, a spatial setting, QCL information, a QCL hypothesis, a QCL indication, a TCI-state, a spatial relation, etc. Among them, the TCI-state can include an uplink (UL) TCI-state and a downlink (DL) TCI-state. It can be understood that the above terms are also equivalent to each other. The beam can also be replaced with other terms representing a beam, which is not limited in the embodiments of this application.

[0089] The beam for transmitting a signal can be referred to as a transmission beam (Tx beam), and the transmission beam can refer to the distribution of signal intensity formed in different directions in space after the signal is transmitted by the antenna. The transmission beam can also be referred to as a spatial domain transmission filter, a spatial transmission filter, a spatial domain transmission parameter, a spatial transmission parameter, a spatial domain transmission setting, or a spatial transmission setting, etc.

[0090] It can be understood that the downlink transmission beam can be indicated by the TCI-state; the uplink transmission beam can be indicated by the spatial relation, the uplink TCI-state, or a sounding reference signal (SRS) resource (indicating the transmission beam using the SRS). Therefore, the uplink beam can also be replaced with the SRS resource.

[0091] The beam for receiving signals can be referred to as a reception beam (Rx beam). The reception beam can refer to the signal strength distribution of wireless signals received from an antenna in different directions in space. The reception beam can also be referred to as a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter, a spatial reception parameter, a spatial domain reception setting, or a spatial reception setting, etc. The uplink transmission beam can be indicated by a spatial relation, or an uplink TCI-state, or an SRS resource (indicating the transmission beam using this SRS). Therefore, the uplink beam can also be replaced by an SRS resource.

[0092] The beam can be a wide beam, or a narrow beam, or other types of beams. The technology for forming a beam can be beamforming technology or other technologies. The beamforming technology can specifically be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology, etc.

[0093] Beams generally correspond to resources. For example, when performing beam measurement, the network device measures different beams through different resources, and the terminal device feeds back the measured resource quality, so that the network device knows the quality of the corresponding beam. During data transmission, the beam information is also indicated through its corresponding resource. For example, the network device uses the TCI field in the downlink control information (DCI) to indicate the beam information of the physical downlink shared channel (PDSCH) of the terminal device. In beam measurement, each beam of the network device corresponds to a resource. Therefore, the beam corresponding to the resource can be uniquely identified by the index of the resource.

[0094] It should be understood that multiple beams with the same or similar communication characteristics are regarded as one beam. One beam can include one or more antenna ports for transmitting data channels, control channels, sounding signals, etc. The one or more antenna ports forming one beam can also be regarded as an antenna port set.

[0095] 2. TCI-state

[0096] A network device can generate different beams and direct them to different transmission directions. In downlink data transmission, when the network device sends data to a terminal device using a specific beam, it needs to inform the terminal device of the transmission beam information it uses, so that the terminal device can use the receiving beam corresponding to the transmission beam to receive the data sent by the network device. In the 3rd generation partnership project (3GPP) release 15 (R15) / R16 protocol, the network device can indicate the relevant information of the transmission beam it uses to the terminal device through the TCI field in the DCI.

[0097] Exemplarily, the TCI field size is 3 bits and can specifically represent 8 different field values (codepoints). Each value of the TCI field corresponds to an index of a TCI-state, and this TCI-state index can uniquely identify a TCI-state. The TCI-state is configured by the network device for each terminal device, and the TCI-state can include several parameters, and the relevant information of the transmission beam can be determined through these parameters.

[0098] Among them, each TCI-state can include its own TCI-state index (TCI-StateId) and two QCL messages (QCL-information, QCL-Info). Each QCL-Info includes a cell field and a bandwidth part identity (bwp-Id), which respectively indicate which cell's which bwp this TCI-state is applied to, that is, different cells or different bwps of the same cell can be configured with different QCL-Info. The QCL-Info also includes a reference signal (referenceSignal, RS), which is used to indicate which reference signal resource forms a QCL relationship with.

[0099] In the R15 / R16 protocol, the term "beam" generally does not directly appear, and the beam is generally replaced by other terms. For example, in data transmission and channel measurement, the beam corresponds to the reference signal resource, and one beam corresponds to one reference signal resource. Therefore, when it is said here which reference signal resource forms a QCL relationship, it actually means which beam forms a QCL relationship.

[0100] The QCL relationship can refer to two reference signal resources (or two antenna ports, and there is a one-to-one correspondence between antenna ports and reference signal resources) having certain same spatial parameters. Specifically, which spatial parameters are the same depends on the type of the QCL-Info, that is, another QCL type (qcl-Type) field of the QCL-Info. The qcl-Type can have four values {typeA, typeB, typeC, typeD}. Taking typeD as an example, typeD means that two reference signal resources have the same spatial reception parameter information, that is, two beams have the same reception beam. It can be understood that at most only one of the two QCL-Info included in the TCI-state can be typeD.

[0101] In the R15 / R16 protocol, the network device indicates the reception beam information of the data transmission beam to a terminal device through the TCI-state, including the configuration, activation, and indication of the TCI-state. The following is a specific introduction.

[0102] (1) Configuration of TCI-state:

[0103] The network device can configure multiple TCI-states for the terminal device through radio resource control (RRC) signaling, and these TCI-states all include a QCL-Info of typeD. It can be understood that the network device can also configure TCI-states that do not include QCL-info of typeD, but these TCI-states are not used for indicating the data transmission beam, so they are not further elaborated here.

[0104] (2) Activation of TCI-state:

[0105] After the network device configures multiple TCI-states, it also needs to activate 8 of these TCI-states through medium access control-control element (MAC CE) signaling. These 8 TCI states correspond one-to-one to 8 values of the TCI field in the DCI. That is, which 8 TCI-states the 8 values of the TCI field in the DCI correspond to is determined through the MAC CE signaling. Figure 1 For the structural schematic diagram of the MAC CE signaling used to activate the TCI, as Figure 1 shown, this MAC CE signaling can include the following fields: reserve (R), serving cell ID, BWP ID, and T0 to T (N-2)×8+7 .

[0106] Among them, the reserved field can be an undefined bit or a bit reserved for direct subsequent use, occupying a total of 1 bit, which can be denoted as R; the serving cell ID field can be used to indicate the identifier of the cell of the network device, occupying a total of 5 bits; the BWP ID can be used to indicate the identifier of a part of the bandwidth of the network device, occupying a total of 2 bits.

[0107] T0 to T (N-2)×8+7 respectively correspond to each TCI-state with indexes from 0 to (N - 2)×8 + 7 configured in the first step. Each field occupies 1 bit, and the value of this 1 bit can be 0 or 1. When the value of this 1 bit is 1, it indicates that the TCI-state is activated; when the value of this 1 bit is 0, it indicates that the TCI-state is not activated. It can be understood that each MAC CE signaling can theoretically have 8 activation fields with a value of 1, and the rest are all 0. The 8 TCI-states corresponding to these 8 fields with a value of 1 are the 8 TCI-states corresponding to the 8 values of the TCI field in the above DCI.

[0108] For example, the TCI-state with the smallest activated index in the MAC CE signaling, and so on, corresponding one by one. It can be understood that there are many types of MAC-CE signaling. In addition to the MAC-CE signaling for TCI-state activation, there are also many other MAC-CE signaling for other purposes. The embodiments of this application only relate to the MAC-CE signaling for TCI-state / TCI-state combination activation. Therefore, unless otherwise specified, the MAC-CE signaling described in the embodiments of this application all refers to this type of MAC-CE signaling.

[0109] (3) TCI-state indication:

[0110] The network device can indicate a specific TCI-state through the TCI field in DCI. For example, if the value of the TCI field in the DCI sent by the network device to the terminal device is 000, it means that the data transmission beam adopts the TCI-state corresponding to 000. The RS included in the QCL-Info of type D within this TCI-state is the channel state information–reference Signal (CSI-RS) with index #1, indicating that the beam used for data transmission is the same as the receiving beam corresponding to the CSI-RS with index #1. The receiving beam corresponding to the CSI-RS with index #1 can be determined through the beam measurement process and is known to the terminal device. Therefore, the terminal device can determine the receiving beam corresponding to the data transmission beam through the specific value of the TCI field, and thus receive data using the corresponding receiving beam.

[0111] 3. Spatial Relationship

[0112] The transmit beam for uplink transmission is indicated through spatial relationship, whose function is similar to TCI-state and is used to inform the terminal device which transmit beam to use for uplink transmission. Uplink transmission also needs to be configured through RRC signaling first. The spatial relationship can include the Id of the spatial relationship, cell Id, target reference signal resource, path loss measurement reference signal, power control parameters, etc. Among them, the target reference signal resource can be used to indicate the corresponding uplink beam. The target reference signal resource can be one of SRS, synchronization signal block (SSB), or CSI-RS.

[0113] If the uplink transmission uses spatial relation #1 and this spatial relation #1 includes a target reference signal resource #2, it means that the transmit beam used for this uplink transmission is the transmit / receive beam of this target reference signal. For example, when the target reference signal resource is the uplink resource SRS, it means that the transmit beam used for uplink transmission is the transmit beam of this SRS (the transmit beam of this SRS is known). Another example is that when the target reference signal resource is a downlink resource such as SSB / CSI-RS, it means that the transmit beam used for uplink transmission is the receive beam of this SSB / CSI-RS (the receive beam of this SSB / CSI-RS is known).

[0114] The network device can configure multiple spatial relations for the terminal device, and then activate one of the spatial relations through the MAC CE signaling for corresponding data transmission. Uplink transmission includes the physical uplink control channel (PUCCH), SRS, physical uplink shared channel (PUSCH), etc., all of which require corresponding spatial relations. It can be understood that the spatial relation of PUCCH is indicated by the MAC-CE signaling; the spatial relation of SRS is also indicated by the MAC-CE signaling; when PUSCH is transmitted, it is associated with a specific SRS and transmits using the spatial relation of this SRS.

[0115] Currently, for the 6th generation (6G) mobile communication scenario, in the network device side with a very large-scale array and digital-analog two-stage weights, based on the same analog beam, different user pairings can be achieved in the digital domain. At this time, in order to improve the multi-user pairing probability within the cell, the same user can be served by multiple different analog beams, and it is necessary to feedback the channel quality indicator (CQI), precoding matrix indicator (PMI), or rank indication (RI) of multiple analog beams for the same user, and the user maintains different receiving beams for different analog beams.

[0116] For the burst services in the existing network, based on the real-time scheduling requirements, the network device needs to decide the analog beam to be scheduled at the current moment and the scheduled users under this beam. For example, as Figure 2 shown, at time slot T1, there are services to be transmitted for UE#1 and UE#2 in the network. At this time, the network device can schedule beam #1 to transmit data for UE#1 and UE#2; at time slot T2, there are services to be transmitted for UE#2 and UE#3 in the network. At this time, the network device can schedule beam #0 to transmit data for UE#2 and UE#3. That is, different beams can transmit for the same user at different times.

[0117] In the NR protocol, the network device side can carry the TCI through DCI to indicate to the terminal device the transmission beam information of the PDSCH scheduled by the current PDCCH, so as to guide the terminal device to receive the PDSCH with a suitable receiving beam to achieve correct demodulation of the PDSCH. Considering the processing delay introduced by the terminal device demodulating the DCI and performing beam switching, after receiving the PDCCH signal, the terminal device needs to wait for a duration of timeDuration symbols before it can update the receiving beam of the terminal device based on the TCI indication carried by the DCI.

[0118] The terminal device needs to receive the PDSCH data after timeDuration based on the new receiving beam. Among them, the specific value of timeDuation is related to the processing capability of the terminal device. The terminal device reports the capability parameter to the network device: the duration of QCL (timeDurationForQCL), informing the terminal device of the processing delay required to execute the PDCCH reception and use the spatial QCL information indicated by the PDCCH.

[0119] However, since the terminal device needs a certain amount of processing time to blindly detect the DCI, when the terminal device receives the PDSCH data in the first few symbols of the current time slot, it does not know the specific information indicated by the TCI carried by the DCI, so that the receiving beam used by the terminal device is not necessarily the most suitable, thus affecting the system capacity.

[0120] For example, as shown in (a) of Figure 3 , in time slot T1, UE#2 has traffic to be transmitted. At this time, the network can schedule beam #1 to transmit data for UE#2; then, as shown in (b) of Figure 3 , in time slot T2, UE#2 has traffic to be transmitted. At this time, the network can schedule beam #0 to transmit data for UE#2. Let the receiving beam corresponding to beam #1 be beam #11, and the receiving beam corresponding to beam #0 be beam #00.

[0121] However, since the terminal device needs a certain timeDuration to blindly detect the DCI, when UE#2 receives the PDSCH data in the first few symbols of time slot T2, such as the symbols corresponding to the above timeDuration, it does not know the specific information indicated by the TCI carried by the DCI in the PDCCH, resulting in UE#2 still using the beam #11 corresponding to beam #1 used in time slot T1 to receive the PDSCH data in the first few symbols of time slot T2, so that the quality of the signal received by UE#2 is not high, which may cause the demodulation of the PDSCH data to fail, thus affecting the system capacity.

[0122] In view of the above technical problems, the embodiments of the present application propose the following technical solutions to improve the system capacity.

[0123] The technical solutions in the present application will be described below in conjunction with the accompanying drawings.

[0124] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as wireless fidelity (WiFi) systems, vehicle-to-everything (V2X) communication systems, device-to-device (D2D) communication systems, 4G, such as long term evolution (LTE) systems, worldwide interoperability for microwave access (WiMAX) communication systems, 5G, such as new radio systems, and future communication systems, etc.

[0125] The embodiments of the present application will present various aspects, embodiments or features around a system that may include multiple devices, components, modules, etc. It should be understood and appreciated that each system may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. In addition, combinations of these solutions can also be used.

[0126] In addition, in the embodiments of the present application, words such as "exemplary" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of the word "exemplary" is intended to present concepts in a specific manner.

[0127] In the embodiments of the present application, "information", "signal", "message", "channel", "signaling" can sometimes be used interchangeably. It should be noted that when the differences are not emphasized, their intended meanings are matched. "Of", "corresponding", and "corresponding" can sometimes be used interchangeably. It should be noted that when the differences are not emphasized, their intended meanings are matched. In addition, the " / " mentioned in the embodiments of the present application can be used to represent an "or" relationship.

[0128] It can be understood that in the embodiments of the present application, "indication" may include direct indication, indirect indication, display indication, implicit indication. When it is described that a certain indication information is used to indicate A, it can be understood that the indication information carries A, directly indicates A, or indirectly indicates A.

[0129] In the embodiments of the present application, the information indicated by the indication information is referred to as the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example, but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the index of the information to be indicated, etc. It can also indirectly indicate the information to be indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to only indicate a part of the information to be indicated, while the other parts of the information to be indicated are known or pre-agreed. For example, the arrangement order of each piece of information pre-agreed (such as stipulated by the protocol) can also be used to indicate specific information, thereby reducing the indication overhead to a certain extent. The information to be indicated can be sent as a whole, or divided into multiple sub-information and sent separately, and the sending periods and / or sending times of these sub-information can be the same or different. The specific sending method is not limited in the embodiments of the present application. Among them, the sending periods and / or sending times of these sub-information can be predefined, such as predefined according to the protocol, or configured by the transmitting device by sending configuration information to the receiving device.

[0130] The network architecture and service scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation to the technical solutions provided by the embodiments of the present application. Those of ordinary skill in the art know that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0131] To facilitate the understanding of the embodiments of the present application, first, Figure 4 taking the communication system shown as an example, the communication system applicable to the embodiments of the present application will be described in detail. Exemplarily, Figure 4 FIG. is a schematic architecture of a communication system applicable to the communication method provided by the embodiments of the present application Figure 1 .

[0132] As Figure 4 shown, the communication system mainly includes: a network device and a terminal device.

[0133] Among them, there can be multiple network devices, such as a first network device, a second network device, a third network device, etc. The network device can be a device with wireless transceiver functions, or it can also be a chip or a chip system provided in the device, located in the access network (AN) of the communication system, and used to provide access services for terminals. For example, the network device can be called a radio access network (RAN) device. Specifically, it can be an access network device for the next-generation mobile communication system, such as a 6G base station. Or, in the next-generation mobile communication system, the network device can also have other naming methods, all of which are covered by the protection scope of the embodiments of this application, and this application does not make any limitations in this regard. Or, the network device can also include 5G, such as the gNB in the new radio (NR) system, or one or a group (including multiple antenna panels) of antenna panels of the base station in 5G. Or, it can also be a network node that constitutes a gNB, a transmission and reception point (TRP or transmission point, TP), or a transmission measurement function (TMF), such as a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), an RSU with base station functions, or a wired access gateway, or a core network element in 5G, etc. Or, the network device can also include: an access point (AP) in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, various forms of macro base stations, micro base stations (also called small stations), relay stations, access points, wearable devices, in-vehicle devices, and so on.

[0134] Among them, the CU and the DU can be set separately, or can also be included in the same network element, such as in a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as included in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). It can be understood that the network device can be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be classified as a network device in the radio access network (RAN), or the CU can be classified as a network device in the core network (CN), which is not limited herein.

[0135] In different systems, the CU (or CU-CP and CU-UP), DU, or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, the CU can also be called an O-CU (Open CU), the DU can also be called an O-DU, the CU-CP can also be called an O-CU-CP, the CU-UP can also be called an O-CU-UP, and the RU can also be called an O-RU. For the convenience of description, the CU, CU-CP, CU-UP, DU, and RU are used as examples in this application. Any one of the CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0136] In the embodiments of this application, the form of the network device is not limited. The device for implementing the functions of the network device can be the network device; it can also be a device capable of supporting the network device to implement the functions, such as a chip system. This device can be installed in the network device or used in matching with the network device.

[0137] The terminal device(s) can be one or more, such as the first terminal device, the second terminal device, the third terminal device, etc. The terminal device can be a terminal device with transceiver functions, or it can also be a chip or chip system disposed in the terminal device. The terminal device can also be referred to as user equipment (UE), access terminal device, subscriber unit, user station, mobile station (MS), mobile unit, remote station, remote terminal device, mobile device, user terminal device, terminal device, wireless communication device, user agent, or user device. The terminal device in the embodiments of the present application can be a mobile phone, cellular phone, smart phone, tablet (Pad), wireless data card, personal digital assistant (PDA), wireless modem, handset, laptop computer, machine type communication (MTC) terminal device, computer with wireless transceiver functions, virtual reality (VR) terminal device, augmented reality (AR) terminal device, smart home devices (such as refrigerators, TVs, air conditioners, electricity meters, etc.), smart robots, robotic arms, workshop equipment, wireless terminal devices in self-driving, wireless terminal devices in industrial control, wireless terminal devices in self-driving, wireless terminal devices in remote medical, wireless terminal devices in smart grid, wireless terminal devices in transportation safety, wireless terminal devices in smart city, wireless terminal devices in smart home, in-vehicle terminal devices, roadside units (RSUs) with terminal device functions, etc., flight devices (such as smart robots, hot air balloons, unmanned aerial vehicles, airplanes), etc. The terminal device in the present application can also be an in-vehicle module, in-vehicle module group, in-vehicle component, in-vehicle chip, or in-vehicle unit built into a vehicle as one or more components or units. The terminal device can also be other devices with terminal device functions. For example, the terminal device can also be a device that serves as a terminal device in D2D communication.

[0138] Embodiments of this application do not limit the form of the terminal device. The device for implementing the functions of the terminal device can be the terminal device itself; it can also be a device capable of supporting the terminal device to implement such functions, such as a chip system. This device can be installed in the terminal device or used in conjunction with the terminal device. In embodiments of this application, the chip system can be composed of chips or can include chips and other discrete devices.

[0139] In this communication system, the network device can pre-configure the mapping relationship between the pilot sequence and the transmission beam for the terminal device. The terminal device can determine the first transmission beam of the downlink channel corresponding to the first pilot sequence according to this mapping relationship and the first pilot sequence corresponding to the received pilot signal, so that subsequently the terminal device can determine the corresponding reception beam according to this first transmission beam to achieve more rapid reception of the downlink channel using the newly matched reception beam, thereby improving the system capacity and user experience.

[0140] Exemplarily, Figure 5 is a schematic diagram of the architecture of a communication system applicable to the communication method provided in embodiments of this application. Figure 2 As Figure 5 shown, the communication between the network device and the terminal device in this communication system can also be represented in another form. The terminal device 10 includes: a processor 101, a memory 102, and a transceiver 103. The transceiver 103 includes: a transmitter 1031, a receiver 1032, and multiple antennas 1033 (antenna panel). The network device 20 includes a processor 201, a memory 202, and a transceiver 203. The transceiver 203 includes: a transmitter 2031, a receiver 2032, and at least one antenna 2033 (antenna panel). The receiver 1032 can be used to receive transmission control information through the antenna 1033, and the transmitter 1031 can be used to send transmission feedback information to the network device 20 through the antenna 1033. The transmitter 2031 can be used to send transmission control information to the terminal device 10 through the antenna 2033, and the receiver 2032 can be used to receive the transmission feedback information sent by the terminal device 10 through the antenna 2033.

[0141] It can be understood that Figure 4 - Figure 5 is only a simplified schematic diagram for easy understanding. This communication system may also include other network devices and / or other terminal devices, Figure 4 - Figure 5 which are not shown in the figure.

[0142] For easy understanding, the communication method provided in embodiments of this application will be specifically described below in conjunction with Figure 6 - Figure 8 Exemplarily,

[0143] Exemplarily, Figure 6Schematic flowchart of a communication method provided by an embodiment of this application. This method can be applied to the communication between a network device and a terminal device in the above communication system.

[0144] Specifically, as Figure 6 shown, the process of this communication method is as follows:

[0145] S601, the network device sends configuration information to the terminal device. Correspondingly, the terminal device receives the configuration information from the network device.

[0146] Among them, the configuration information can be used to indicate the mapping relationship between the pilot sequence and the transmission beam, and the configuration information can be carried in at least one of the following: RRC signaling, MAC-CE signaling, or DCI, without limitation. The pilot sequence can be used for channel estimation and synchronization to ensure the quality of channel estimation. The pilot sequence can be associated with any channel. Exemplarily, the following are the downlink control channel, downlink data channel, uplink control channel, uplink data channel, etc., without limitation. Exemplarily, the pilot sequence can be a CSI-RS sequence, an SSB sequence, a tracking reference signal (TRS) sequence, a phase noise tracking reference signal (PT-RS) sequence, a dedicated demodulation reference signal (DMRS) sequence, or a sounding reference signal SRS resource, etc., without limitation. For ease of understanding, the embodiment of this application takes the pilot sequence as the DMRS sequence as an example for subsequent introduction. It can be understood that in the embodiment of this application, the DMRS sequence is associated with the PDCCH and can also be called the PDCCH-DMRS sequence, which will not be elaborated later.

[0147] It can be understood that the above pilot sequence can be a set of pilot sequences, and the set of pilot sequences can include at least one pilot sequence, without limitation.

[0148] In a possible design solution, the pilot sequence can be characterized by different scrambling identifiers or by different parameter values of the sequence expression. The following takes the following two cases as examples for specific introduction.

[0149] Case 1: The pilot sequence is characterized by different scrambling identifiers.

[0150] Exemplarily, the network device may configure multiple PDCCH-DMRS scrambling ID values for each control resource set (CORESET) of the terminal device, and different IDs may correspond to different DMRS sequences. It can be understood that the CORESET may be a time-frequency domain resource set carrying downlink control information, and the terminal device may detect the PDCCH on the time-frequency domain resource set corresponding to the CORESET.

[0151] For example, the PDCCH-DMRS scrambling ID values may be DMRS sequence #0, DMRS sequence #1, DMRS sequence #2... DMRS sequence #n to represent different DMRS sequences.

[0152] Optionally, the network device may select multiple DMRS sequences with high auto-correlation peak and low cross-correlation peak within the set of available values of the existing PDCCH-DMRS scrambling ID and configure them for the terminal device to represent different transmission beams, without limitation.

[0153] Case 2: The pilot sequence is represented by different parameter values of the sequence expression.

[0154] Exemplarily, the network device may configure 1 PDCCH-DMRS scrambling ID value for each CORESET of the terminal device. At this time, the network device may update the initialization formula of the PDCCH-DMRS pseudo-random sequence generator in the existing protocol, and represent different DMRS sequences through different parameter values.

[0155] The updated initialization formula of the PDCCH-DMRS sequence may be represented by the following formula:

[0156]

[0157] Among them, C init is the DMRS sequence; k is a predefined value, and the value can be 2, 3, 4, or 5; l is the orthogonal frequency-division multiplexing (OFDM) symbol index included in one time slot; is the time slot index within one system frame; is the number of symbols per time slot; N ID is the cell identifier.

[0158] i beam with different values may correspond to different DMRS sequences, i beamIt can carry X-bit beam indication information. Exemplarily, if the network device expects to indicate one of N beams through the DMRS sequence, then For example, when the network device expects to indicate 10 beams through the DMRS sequence, That is, i beam It can carry 4-bit beam indication information. Different values of the 4-bit beam indication information can represent 4 beams, or rather, 4 different DMRS sequences. The transmit beam can be a downlink transmit beam, which is used by the network device to transmit a downlink data channel or a downlink control channel, such as PDCCH, PDSCH, etc., without limitation.

[0159] It can be understood that the transmit beam can be a set of transmit beams, and this set of transmit beams can include at least one transmit beam. The number of transmit beams is the same as the number of the above pilot sequences, without limitation. It should be understood that for the specific introduction of the transmit beam, reference can be made to the relevant introduction in the above technical terms section, and details are not elaborated here.

[0160] The mapping relationship can include: the mapping relationship between the pilot sequence and the Transmission Configuration Indicator (TCI), or the mapping relationship between the pilot sequence and the pilot resource. The following takes the following two cases as examples for specific introduction.

[0161] Case 3: The mapping relationship between the pilot sequence and the Transmission Configuration Indicator (TCI).

[0162] Among them, the TCI can be used to indicate the beam. The TCI can be the TCI state, and the TCI state can be used to indicate the PDSCH spatial domain reception parameters. It should be understood that for the specific introduction of the TCI state, reference can be made to the relevant introduction in the above technical terms section, and details are not elaborated here. It can be understood that the mapping relationship between the pilot sequence and the TCI is the mapping relationship between the DMRS sequence and the TCI state, and each DMRS sequence can correspond to a TCI state.

[0163] The following takes the following two ways to specifically introduce Case 3.

[0164] Method 1: The network device configures the mapping relationship between the pilot sequence and each TCI state in the TCI state set. Exemplarily, the network device may configure the TCI state set for indicating the PDSCH spatial domain reception parameter to the terminal device. For example, the network device may send the TCI state set to the terminal device through RRC signaling, without limitation. Then, the network device may send configuration information to the terminal device to indicate that each DMRS sequence is associated with each TCI state in the TCI state set, or in other words, each DMRS sequence corresponds one-to-one with each TCI state in the TCI state set. It can be understood that the TCI state can be characterized by its own TCI-StateId. Each DMRS sequence being associated with each TCI state in the TCI state set can also be understood as each DMRS sequence being associated with or corresponding one-to-one with the TCI StateId corresponding to each TCI state in the TCI state set, without limitation.

[0165] For ease of understanding, the following takes the pilot sequence being characterized by different scrambling identifiers as an example for introduction, and will not be elaborated later. Exemplarily, as shown in Table 1, the configuration information may indicate that: DMRS sequence #0 is associated with the TCI state corresponding to TCI-StateId = 0; DMRS sequence #1 is associated with the TCI state corresponding to TCI-StateId = 1; DMRS sequence #2 is associated with the TCI state corresponding to TCI-StateId = 2... DMRS sequence #n is associated with the TCI state corresponding to TCI-StateId = n, and so on, without limitation.

[0166] Table 1

[0167]

[0168] It can be understood that the TCI state corresponding to TCI-StateId = 0, the TCI state corresponding to TCI-StateId = 1, the TCI state corresponding to TCI-StateId = 2... the TCI state corresponding to TCI-StateId = n, etc. in Table 1 above all belong to the TCI states in the TCI state set configured by the network device for the terminal device.

[0169] In this way, optionally, the network device may configure the mapping relationship between the PDCCH-DMRS sequence and the transmission beam for the user through RRC signaling. That is, the above configuration information may be carried in the RRC signaling. The network device may configure multiple PDCCH-DMRS scrambling IDs within the CORESET. Each PDCCH-DMRS-scrambling ID may be associated with a TCI state, which will not be elaborated here.

[0170] Optionally, the TCI state may be a unified TCI state, or a TCI-UL-State, etc., which is not limited.

[0171] Method 2: The network device configures the mapping relationship between the pilot sequence and each TCI state in the activated set of TCI states.

[0172] Exemplarily, the network device may configure a set of TCI states for the terminal device to indicate the PDSCH spatial domain reception parameters. For example, the network device may send the set of TCI states to the terminal device through RRC signaling, which is not limited; then, the network device may activate some of the TCI states in the set of TCI states through MAC-CE signaling, and this part of the TCI states is denoted as the activated set of TCI states; after that, the network device sends configuration information to the terminal device to indicate that each DMRS sequence is associated with each TCI state in the activated set of TCI states, or rather, each DMRS sequence corresponds one-to-one with each TCI state in this activated part of the TCI states.

[0173] Exemplarily, as shown in Table 2, the configuration information may indicate that: DMRS sequence #0 is associated with the 1st TCI state in the activated set of TCI states; DMRS sequence #1 is associated with the 2nd TCI state in the activated set of TCI states; DMRS sequence #2 is associated with the 3rd TCI state in the activated set of TCI states... DMRS sequence #n is associated with the 3rd TCI state in the activated set of TCI states, and so on, which is not limited.

[0174] Table 2

[0175]

[0176] In this way, optionally, the network device may configure the mapping relationship between the PDCCH-DMRS sequence and the transmission beam for the user through MAC-CE signaling, that is, the above configuration information may be carried in the MAC-CE signaling. Exemplarily, the network device may configure multiple PDCCH-DMRS scrambling IDs within the CORESET through RRC signaling; then, the network device may define a new MAC-CE format for the activation / deactivation of TCI States for UE-specific PDCCH-DMRS. The newly defined MAC-CE format may include at least one of the following parameters: CORESET ID, TCI state ID, BWP ID, or serving cell ID, without limitation.

[0177] Exemplarily, the first PDCCH-DMRS scrambling ID of the above RRC signaling corresponds to the first TCI state ID carried by the MAC-CE, the second PDCCH-DMRS scrambling ID of the RRC signaling corresponds to the second TCI state ID carried by the MAC-CE, and so on.

[0178] For example, assume that the set of TCI states configured by the network device for the terminal device through RRC signaling includes 128 TCI states, and their corresponding TCI StateIds are 0-127; the network device activates some of the 128 TCI states through the above newly defined MAC-CE format, such as the TCI state corresponding to TCI StateId = 0, the TCI state corresponding to TCI StateId = 3, the TCI state corresponding to TCI StateId = 5, and the TCI state corresponding to TCI StateId = 9, that is, the TCI state IDs carried by the MAC-CE include: TCI StateId = 0, TCI StateId = 3, TCI StateId = 5, and TCI StateId = 9.

[0179] The sequences configured by the network device within the CORESET through RRC signaling include: DMRS sequence #0, DMRS sequence #1, DMRS sequence #2, and DMRS sequence #3. At this time, DMRS sequence #0 is associated with the TCI state corresponding to the above TCI StateId = 0, DMRS sequence #1 is associated with the TCI state corresponding to the above TCI StateId #3, DMRS sequence #2 is associated with the TCI state corresponding to the above TCI StateId #5, and DMRS sequence #3 is associated with the TCI state corresponding to the above TCI StateId #9.

[0180] It should be understood that in combination with the above Method 1 and Method 2, when the QCL-Info in the TCI state is configured with qcl-type = typeD, the associated reference signal can be CSI-RS, SSB, etc., without limitation. CSI-RS can be characterized by a non-zero power (NZP) CSI-RS resource ID (resourceId), that is, NZP-CSI-RS-resourceId; SSB can be characterized by an SSB index (index), that is, SSB-index. At this time, the terminal device can consider that the DMRS sequence associated with this TCI state has the same spatial domain transmission filtering as the above reference signal, that is, the terminal device can refer to the spatial domain reception filtering of the above reference signal to receive the PDSCH signal.

[0181] Case 4: The mapping relationship between the pilot sequence and the pilot resource.

[0182] Among them, the pilot resource can be used for downlink beam management, or channel state information measurement, etc. Exemplarily, the pilot resource can include at least one of the following: channel state information reference signal CSI-RS resource, synchronization information block SSB resource, TRS resource, PT-RS resource, DMRS resource, or SRS resource, etc., without limitation. It can be understood that each pilot resource can correspond to a transmission beam, and the terminal device can determine the transmission beam corresponding to the corresponding pilot resource (such as the pilot resource corresponding to the following first pilot sequence) as the transmission beam of the downlink channel. For ease of understanding, the following takes the pilot resource as the CSI-RS resource as an example for introduction, and will not be elaborated later.

[0183] The following specifically introduces Case 4 in the following two ways.

[0184] Method 3: The pilot resource is the pilot resource configured by the network device for the terminal device.

[0185] Exemplarily, the network device may configure a set of pilot resources for the terminal device for downlink beam management or channel state information measurement, such as a CSI RS resource set (CSI RS resourceSet). For example, the network device may send the CSI RS resource set to the terminal device through RRC signaling, which is not limited. Then, the network device may send configuration information to the terminal device to indicate that each DMRS sequence is associated with each CSI RS resource in the CSI RS resource set, or in other words, each DMRS sequence corresponds one-to-one to each CSI RS resource in the CSI RS resource set. It can be understood that the CSI RS resource may be characterized by the NZP CSI RS resourceId. Each DMRS sequence being associated with each CSI RS resource in the CSI RS resource set may also be understood as each DMRS sequence being associated with or corresponding one-to-one to the NZP CSI RS resourceId corresponding to each CSI RS resource in the CSI RS resource set, which is not limited.

[0186] Exemplarily, as shown in Table 3, the configuration information may indicate that: DMRS sequence #0 is associated with the CSI RS resource corresponding to NZP CSI RS resourceId = 0; DMRS sequence #1 is associated with the CSI RS resource corresponding to NZP CSI RS resourceId = 1; DMRS sequence #2 is associated with the CSI RS resource corresponding to NZP CSI RS resourceId = 2... DMRS sequence #n is associated with the CSI RS resource corresponding to NZ CSI RS resourceId = n, and so on, which is not limited.

[0187] Table 3

[0188]

[0189] It can be understood that the CSI RS resources corresponding to NZP CSI RS resourceId = 0, NZP CSI RS resourceId = 1, NZP CSI RS resourceId = 2... NZP CSI RS resourceId = n, etc. in Table 3 above all belong to the CSI RS resources in the CSI RS resource set configured by the network device for the terminal device.

[0190] Method 4: The pilot resource is the pilot resource corresponding to the pilot resource indication reported by the terminal device.

[0191] Among them, the pilot resource indication can be used to indicate the pilot resource. For example, taking the pilot resource as the CSI RS resource, the pilot resource indication can be the CSI RS resource indicator (CRI) in the channel state information report (CSI). Each CRI can correspond to a CSI RS resource. The network device can configure the mapping relationship between the DMRS sequence and the CSI RS resource corresponding to the CRI reported by the CSI.

[0192] Exemplarily, the network device can configure one or more CSI report configurations for the terminal device. Each CSI report can configure a set of CSI RS resources (or NZP CSI resourceSet, etc.) for channel measurement. This set of CSI RS resources can include one or more CSI RS resources. The terminal device can choose to report the CRI. For example, if the CRI in the CSI reported by the terminal device is 0, this CRI corresponds to the first CSI RS resource in the set of CSI RS resources; if the CRI in the CSI reported by the terminal device is 1, this CRI corresponds to the second CSI RS resource in the set of CSI RS resources, and so on, without further elaboration. The network device can determine the corresponding pilot resource according to the reported CRI and configure the corresponding pilot sequence for this part of the pilot resources.

[0193] It can be understood that the CSI report can be used for reporting the reference signal receiving power (RSRP) for beam management, or the signal to interference plus noise ratio (SINR), or can also be used for reporting RI, CQI, or PMI, etc., without limitation. Exemplarily, as shown in Table 4, the configuration information can indicate that: DMRS sequence #0 is associated with the CSI RS resource corresponding to the first CRI reported by the CSI; DMRS sequence #1 is associated with the CSI RS resource corresponding to the second CRI reported by the CSI; DMRS sequence #2 is associated with the CSI RS resource corresponding to the third CRI reported by the terminal device's CSI... DMRS sequence #n is associated with the CSI RS resource corresponding to the (n + 1)-th CRI reported by the terminal device's CSI, and so on, without limitation.

[0194] Table 4

[0195]

[0196] For example, assume that there are 4 CSI RS resources in a CSI RS resource set, namely {CSI RS resourcesId = 3, CSI RS resourcesId = 9, CSI RS resourcesId = 9, CSI RS resourcesId = 2}; assume that the terminal device reports 2 CRIs, namely {CRI = 0, CRI = 3}, then the network device can indicate through configuration information that: DMRS sequence #0 is associated with the CSI RS resource corresponding to CSI RS resourcesId = 3, and DMRS sequence #1 is associated with the CSI RS resource corresponding to CSI RS resourcesId = 2.

[0197] It can be understood that the naming of the above configuration information is only an example, and the configuration information can also be replaced with any other possible naming, such as mapping indication information, etc., without limitation.

[0198] S602, the network device sends a pilot signal to the terminal device. Correspondingly, the terminal device receives the pilot signal from the network device.

[0199] Among them, the pilot signal can also be called a reference signal and can be used for channel estimation or detection. Exemplarily, the pilot signal can be CSI-RS, SSB, PT-RS, DMRS, or SRS, etc., without limitation. For ease of understanding, the embodiments of the present application will take the pilot signal as DMRS as an example for subsequent introduction.

[0200] The pilot signal corresponds to a first pilot sequence. The above pilot sequence includes the first pilot sequence. That is, the network device can send the pilot signal to the terminal device through the first pilot sequence. The first pilot sequence can be one of at least one pilot sequence in the pilot sequence set configured by the network device, without limitation. It can be understood that the first pilot sequence is a pilot sequence selected by the network device for the terminal device based on the scheduling beam of the current time slot PDSCH. The embodiments of the present application do not limit this implementation process. Optionally, the pilot signal can be associated with any channel. Exemplarily, the following are the downlink control channel, downlink data channel, uplink control channel, uplink data channel, etc., without limitation. For ease of understanding, the embodiments of the present application will take the pilot signal associated with the PDCCH as an example for introduction. For example, the above DMRS can be associated with the PDCCH. The network device can send the PDCCH to the terminal device based on the first pilot sequence. The PDCCH can also be associated with the specific scheduling information of the PDSCH, such as modulation and coding scheme (MCS), time-frequency domain resource location, etc., without limitation.

[0201] Exemplarily, assume that the network device has 2 beams (transmission beams), denoted as beam #a and beam #b respectively. The correspondence between these 2 beams and the CSI RS resources is as follows: The CSI RS resource with CSI RS resourceId = 0 corresponds to beam #a, that is, the CSI RS resource with CSI RS resourceId = 0 is transmitted using the transmission spatial filtering beam #a; The CSI RS resource with CSI RS resourceId = 1 corresponds to beam #b, that is, the CSI RS resource with CSI RS resourceId = 1 is transmitted using the transmission spatial filtering beam #b. Taking the above method 3 as an example, assume that DMRS sequence #0 is associated with the CSI RS resource with CSI RS resourceId = 0, and DMRS sequence #1 is associated with the CSI RS resource with CSI RS resourceId = 0

[0202] If the network device realizes the PDSCH scheduling transmission of the current time slot based on beam #a, the network device can use the DMRS sequence corresponding to DMRS sequence #0 to transmit the DMRS signal of the PDCCH associated with the PDSCH scheduling information; If the network device realizes the PDSCH scheduling transmission of the current time slot based on beam #b, the network device can use the DMRS sequence corresponding to DMRS sequence #1 to transmit the DMRS signal of the PDCCH associated with the PDSCH scheduling information.

[0203] S603. The terminal device determines the first transmission beam of the downlink channel according to the configuration information and the first pilot sequence.

[0204] It can be understood that before specifically introducing how the terminal device determines the first transmission beam, the implementation process of how the terminal device determines the first pilot sequence will be specifically introduced.

[0205] In a possible design solution, before the terminal device determines the first transmission beam of the downlink channel according to the configuration information and the first pilot sequence, the above method may further include:

[0206] The terminal device determines the first pilot sequence by performing correlation detection of the pilot sequence on the pilot signal.

[0207] The terminal device can perform sequence correlation detection at corresponding time-frequency resource positions based on the parameter related to each pilot sequence in the set of pilot sequences configured by the network device and the CORESET configuration parameter corresponding to the PDCCH channel, so as to determine the first pilot sequence. Exemplarily, the terminal device can determine the time-frequency resource position of the pilot signal based on the time-frequency resource position where the PDCCH may be occupied indicated by the CORESET configuration parameter, and extract the received signal at this time-frequency resource position. The terminal device can perform correlation (operation) between each pilot sequence in the configured set of pilot sequences and the received signal extracted at this time-frequency resource position respectively, determine the pilot sequence in the set of pilot sequences with the largest autocorrelation peak after sequence correlation with the received signal, and determine this pilot sequence as the pilot sequence for transmitting the pilot signal, that is, the first pilot sequence.

[0208] For example, continuing with the example in step S602 above, the terminal device extracts the DMRS signal (corresponding to DMRS sequence #1) at the corresponding time-frequency resource position, and performs correlation between the DMRS signal and DMRS sequence #0 and DMRS sequence #1 respectively. Suppose the autocorrelation peak value after correlation between DMRS sequence #1 and the DMRS signal is significantly higher than the autocorrelation peak value after correlation between DMRS sequence #0 and the DMRS signal, then the terminal device can determine that the pilot sequence corresponding to the DMRS signal is DMRS sequence #1.

[0209] It should be understood that the implementation process of the terminal device performing sequence correlation detection on the pilot sequence can refer to the sequence correlation detection process in the prior art, and this application embodiment does not limit this.

[0210] Combined with the above introduction, the specific implementation process of the terminal device determining the first transmission beam is specifically introduced below.

[0211] The terminal device can determine the first transmission beam corresponding to the first pilot sequence according to the determined first pilot sequence and the pre-configured mapping relationship between the pilot sequence and the transmission beam, and determine this first transmission beam as the transmission beam of the downlink channel. For example, continuing with the above example, the terminal device can determine the corresponding transmission beam as beam #b through the determined DMRS sequence #1, that is, beam #b is the downlink transmission beam of the current time slot.

[0212] In a possible design solution, the terminal device determines the first transmission beam of the downlink channel according to the configuration information and the first pilot sequence, including: before demodulating the downlink control information DCI, the terminal device determines the first transmission beam of the downlink channel according to the configuration information and the first pilot sequence.

[0213] It can be understood that the terminal device performs correlation detection on the sequence before demodulating the DCI. That is, the terminal device can obtain beam indication information, i.e., the above-mentioned first transmission beam, before demodulating the DCI, so as to more quickly receive the downlink channel using the matching receiving beam, thereby improving user performance and user experience.

[0214] In summary, the network device can pre-configure the mapping relationship between the pilot sequence and the transmission beam for the terminal device. The terminal device can determine the first transmission beam of the downlink channel corresponding to the first pilot sequence corresponding to the received pilot signal according to this mapping relationship, so that the terminal device can subsequently determine the corresponding receiving beam according to the first transmission beam, so as to more quickly receive the downlink channel using the newly matching receiving beam, thereby improving system capacity and user experience.

[0215] Combined with the above embodiments, in a possible design solution, the above method may further include:

[0216] The network device uses the first transmission beam of the downlink channel to send the downlink data channel or the downlink control channel to the terminal device.

[0217] Correspondingly, the terminal device determines the first receiving beam of the downlink channel according to the first transmission beam; the terminal device uses the first receiving beam to receive the downlink data channel or the downlink control channel. Among them, the transmission beam includes the first transmission beam.

[0218] It can be understood that the terminal device can determine a suitable first receiving beam according to the first transmission beam determined in step S603 above, and use this first receiving beam to receive the downlink data channel or the downlink control channel from the network device. Exemplarily, the terminal device can refer to the spatial domain receiving beam of the first transmission beam and determine this spatial domain receiving beam as the first receiving beam, or the terminal device can also determine the first receiving beam corresponding to the first transmission beam in other ways, which is not limited. For example, continuing the above example, if the receiving beam corresponding to the above beam #b is beam #b1, then the terminal device can use this beam #b1 to receive the data of the downlink data channel or the control information of the downlink control channel.

[0219] In a possible design solution, the terminal device uses the first receiving beam to receive the downlink data channel or the downlink control channel, including:

[0220] On the symbol after the symbol interval between the last symbol carrying the pilot signal is greater than or equal to X symbols, the terminal device uses the first receiving beam to receive the downlink data channel or the downlink control channel.

[0221] Among them, X symbols are the time required for the terminal device to perform correlation detection of the pilot sequence and / or perform beam switching. X is an integer greater than or equal to 0. The time required for beam switching can be the time required for the terminal device to switch from one receiving beam to another receiving beam.

[0222] The following takes the following two scenarios as examples for specific introduction.

[0223] Scenario 1: X is equal to 0, and the terminal device can achieve zero-delay beam switching.

[0224] Exemplarily, if the time required for the terminal device to perform correlation detection of the pilot sequence and / or perform beam switching is short, at this time, X symbols can be ignored, and zero-delay beam switching between the downlink control channel (such as the PDCCH associated with the above-mentioned first pilot sequence and DCI) and the downlink data channel (such as PDSCH) can be achieved. That is, the terminal device can, on the symbols adjacent to the PDCCH, select a matching first receiving beam based on the first transmitting beam to receive the data of the downlink data channel or the control information transmitted by the subsequent downlink control channel.

[0225] For example, suppose that in time slot T1, the network device sends PDSCH data to UE#a through beam #a. Based on real-time scheduling requirements, as Figure 7 shown, the network device needs to send PDSCH data to UE#a through beam #b (i.e., the above-mentioned first transmitting beam) in time slot T2. Suppose the receiving beam corresponding to beam #a is beam #a1, and time slot T1 is less than time slot T2. In this case, in time slot T2, the terminal device can, on the symbols adjacent to the PDCCH, use beam #b1 (i.e., the above-mentioned first receiving beam) corresponding to beam #b to receive the PDSCH data.

[0226] Scenario 2: X is an integer greater than 0, and the terminal device needs to go through a certain duration, denoted as timeDuration1#1, and this timeDuration1#1 is equal to X symbols.

[0227] Exemplarily, if the time required for the terminal device to perform correlation detection of the pilot sequence and / or perform beam switching is long and zero-delay beam switching between the downlink control channel and the downlink data channel cannot be achieved, at this time, the terminal device can report a time requirement timeDuration#1 that takes into account the sequence detection and beam switching processing delay. The terminal device can, on the symbols whose interval from the last symbol of the PDCCH is greater than or equal to timeDuration#1, select a matching first receiving beam based on the first transmitting beam to receive the data of the downlink data channel or the control information transmitted by the subsequent downlink control channel.

[0228] It can be understood that this timeDuration#1 is shorter than the timeDuration required for the above-mentioned terminal device to blindly detect DCI. Or rather, timeDuration#1 is less than timeDuration. For the beam used on the symbol whose interval from the last symbol of the PDCCH is less than timeDuration#1, the convention of the existing protocol is reused without limitation. For example, on the symbol whose interval from the last symbol of the PDCCH is less than timeDuration#1, the terminal device can use the receiving beam used in the previous time slot of the current time slot to continue receiving the data of the downlink data channel or the control information transmitted by the subsequent downlink control channel.

[0229] For example, it is assumed that in time slot T1, the network device sends PDSCH data to UE#a through beam #a. Based on the real-time scheduling requirements, as Figure 8 shown, the network device needs to send PDSCH data to UE#a through beam #b (i.e., the above-mentioned first transmission beam) in time slot T2. Let the receiving beam corresponding to beam #a be beam #a1, and time slot T1 is less than time slot T2. On the symbol corresponding to timeDuration#1 in time slot T2, the terminal device can use beam #a1 corresponding to time slot T1 to receive PDSCH data; on the symbol corresponding to the time period after timeDuration#1 in time slot T2, the terminal device can use beam #b1 corresponding to beam #b (i.e., the above-mentioned first receiving beam) to receive PDSCH data.

[0230] It can be understood that the above embodiments are introduced by taking the scenario of downlink transmission as an example. That is, before the terminal device completes DCI demodulation, the terminal device can determine the (downlink) transmission beam used by the network device in the current time slot based on the mapping relationship between the configured pilot sequence and the transmission beam, and select an appropriate (downlink) receiving beam according to the transmission beam to receive the data or information of the downlink channel. It can be understood that in the scenario of uplink transmission, the network device determines the (uplink) transmission beam used by the terminal device in the current time slot, and selects an appropriate (downlink) receiving beam according to the transmission beam to receive the data or information of the uplink channel. The implementation principle is similar to that of the above-mentioned downlink transmission scenario and can be understood by reference without further elaboration.

[0231] The above combines Figure 6 - Figure 8 and details the communication method provided by the embodiments of the present application. The following combines 9- Figure 10 and details the communication device for executing the communication method provided by the embodiments of the present application.

[0232] Figure 9 is the structural schematic Figure 1 . Exemplarily, such as Figure 9As shown, the communication device 900 includes a transceiver module 901 and a processing module 902. For ease of explanation, Figure 9 only the main components of the communication device 900 are shown.

[0233] In some embodiments, the communication device 900 can be applicable to Figure 4 the communication system shown in, and perform the functions of the above terminal device.

[0234] Among them, the transceiver module 901 can be used to perform the function of the terminal device for sending and receiving messages, and the processing module 902 can perform the functions of the terminal device other than sending and receiving messages. For example, the transceiver module 901 is used to receive configuration information from a network device and receive a pilot signal from the network device. The processing module 902 is used to determine a first transmission beam of a downlink channel according to the configuration information and a first pilot sequence. Among them, the configuration information is used to indicate the mapping relationship between the pilot sequence and the transmission beam; the pilot signal corresponds to the first pilot sequence, and the pilot sequence includes the first pilot sequence.

[0235] Optionally, the transceiver module 901 may include a sending module ( Figure 9 not shown in) and a receiving module ( Figure 9 not shown in). Among them, the sending module is used to implement the sending function of the communication device 900, and the receiving module is used to implement the receiving function of the communication device 900.

[0236] Optionally, the communication device 900 may further include a storage module ( Figure 9 not shown in), and the storage module stores programs or instructions. When the processing module 902 executes the programs or instructions, the communication device 900 can perform the above communication method.

[0237] It should be noted that the communication device 900 can be a terminal device, or a chip (system) or other components or assemblies in the terminal device, or a device including the terminal device. The embodiments of the present application do not make any limitations in this regard.

[0238] In addition, the technical effects of the communication device 900 can refer to Figure 6 the technical effects of the communication method shown, which will not be elaborated here.

[0239] In some embodiments, the communication device 900 can be applicable to Figure 4 the communication system shown in, and perform the functions of the above network device.

[0240] Among them, the transceiver module 901 can be used to perform the function of the network device for sending and receiving messages, and the processing module 902 can perform functions of the network device other than sending and receiving messages. For example, the transceiver module 901 is used to send configuration information to the terminal device and send a pilot signal to the terminal device. The configuration information is used to indicate the mapping relationship between the pilot sequence and the transmission beam; the pilot signal corresponds to the first pilot sequence, and the pilot sequence includes the first pilot sequence.

[0241] In a possible design, the processing module 902 is used to send a downlink data channel or a downlink control channel to the terminal device by using the first transmission beam of the downlink channel. The transmission beam includes the first transmission beam. Optionally, the transceiver module 901 may include a sending module and a receiving module. The sending module is used to implement the sending function of the communication device 900, and the receiving module is used to implement the receiving function of the communication device 900.

[0242] Optionally, the communication device 900 may further include a storage module that stores programs or instructions. When the processing module 902 executes the programs or instructions, the communication device 900 can execute the above communication method.

[0243] It should be noted that the communication device 900 may be a network device, or a chip (system) or other components or assemblies in the network device, or a device including the network device. The embodiments of the present application do not make any limitations in this regard.

[0244] In addition, the technical effects of the communication device 900 can refer to the technical effects of the above communication method, which will not be elaborated here.

[0245] Exemplarily, Figure 10 is the structural schematic diagram of the communication device provided by the embodiments of the present application Figure 2 . The communication device may be a terminal device or a network device, or a chip (system) or other components or assemblies of the terminal device or the network device. As Figure 10 shown, the communication device 1000 may include a processor 1001. Optionally, the communication device 1000 may further include a memory 1002 and / or a transceiver 1003. The processor 1001 is coupled to the memory 1002 and the transceiver 1003, and may be connected through a communication bus, for example.

[0246] Next, the components of the communication device 1000 will be specifically introduced in conjunction with Figure 10 :

[0247] Among them, the processor 1001 is the control center of the communication device 1000, which can be a single processor or a collective term for multiple processing elements. For example, the processor 1001 is one or more central processing units (CPUs), or can be an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application. For example: one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs).

[0248] Optionally, the processor 1001 can execute various functions of the communication device 1000 by running or executing software programs stored in the memory 1002 and calling data stored in the memory 1002. For example, it can execute the communication method shown above Figure 6 as shown.

[0249] In a specific implementation, as an embodiment, the processor 1001 can include one or more CPUs, such as Figure 10 CPU0 and CPU1 shown in

[0250] In a specific implementation, as an embodiment, the communication device 1000 can also include multiple processors, such as Figure 10 the processor 1001 and the processor 1004 shown in

[0251] Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). Here, the processor can refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

[0252] Optionally, the memory 1002 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or may be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM), or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 1002 may be integrated with the processor 1001 or may exist independently and be coupled to the processor 1001 through the interface circuit of the communication device 1000 ( Figure 10 not shown in the figure), and the embodiments of the present application do not make specific limitations in this regard.

[0253] The transceiver 1003 is used for communication with other communication devices. For example, when the communication device 1000 is a terminal device, the transceiver 1003 can be used for communication with a network device or with another terminal device. For another example, when the communication device 1000 is a network device, the transceiver 1003 can be used for communication with a terminal device or with another network device.

[0254] Optionally, the transceiver 1003 may include a receiver and a transmitter ( Figure 10 not shown separately in the figure). Among them, the receiver is used to implement the receiving function, and the transmitter is used to implement the sending function.

[0255] Optionally, the transceiver 1003 may be integrated with the processor 1001 or may exist independently and be coupled to the processor 1001 through the interface circuit of the communication device 1000 ( Figure 10 not shown in the figure), and the embodiments of the present application do not make specific limitations in this regard.

[0256] It should be noted that Figure 10 the structure of the communication device 1000 shown in the figure does not constitute a limitation on the communication device. The actual communication device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0257] In addition, the technical effects of the communication device 1000 can refer to the technical effects of the communication method described in the above method embodiments, and will not be elaborated here.

[0258] An embodiment of this application provides a communication system. The communication system may include the terminal device and the network device in the above method embodiment.

[0259] It should be understood that the processor in the embodiment of this application may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0260] It should also be understood that the memory in the embodiment of this application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of random access memory (RAM) are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DRRAM).

[0261] The above embodiments can be implemented in whole or in part by software, hardware (such as circuits), firmware, or any combination thereof. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. 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 (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more collections of available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, or magnetic tape), an optical medium (such as a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0262] It should be understood that the term "and / or" in this document is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Here, A and B can be singular or plural. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after, but it may also represent an "and / or" relationship, which can be understood specifically with reference to the context before and after.

[0263] In this application, "at least one" means one or more, and "a plurality" means two or more. "At least one of the following" or its similar expressions refer to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, a - b, a - c, b - c, or a - b - c, where a, b, and c can be single or multiple.

[0264] It should be understood that in various embodiments of the present application, the magnitudes of the sequence numbers of the above processes do not imply the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0265] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0266] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0267] In several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be electrical, mechanical, or other forms.

[0268] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place, or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0269] In addition, the functional units in each embodiment of this application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0270] If the above-mentioned functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs. As described above, this is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that, It includes: Receiving configuration information from a network device; wherein, the configuration information is used to indicate the mapping relationship between a pilot sequence and a transmission beam; Receiving a pilot signal from the network device; wherein, the pilot signal corresponds to a first pilot sequence, and the pilot sequence includes the first pilot sequence; Determining a first transmission beam of a downlink channel according to the configuration information and the first pilot sequence.

2. The method according to claim 1, characterized in that, The mapping relationship includes: the mapping relationship between the pilot sequence and a transmission configuration indication (TCI), or the mapping relationship between the pilot sequence and a pilot resource.

3. The method according to claim 2, wherein The pilot sequence is characterized by different scrambling identifiers, or by different parameter values of a sequence expression.

4. The method according to claim 2 or 3, characterized in that The pilot resource is a pilot resource configured by the network device for the terminal device, or a pilot resource corresponding to a pilot resource indication reported by the terminal device.

5. The method according to any one of claims 2 - 4, characterized in that, Before determining the first transmission beam of the downlink channel according to the configuration information and the first pilot sequence, the method further includes: Determining the first pilot sequence by performing correlation detection of the pilot sequence on the pilot signal.

6. The method according to any one of claims 2-5, characterized in that Determining the first transmission beam of the downlink channel according to the configuration information and the first pilot sequence includes: Before demodulating downlink control information (DCI), determining the first transmission beam of the downlink channel according to the configuration information and the first pilot sequence.

7. The method according to any one of claims 2-6, characterized in that, The method further includes: Determining a first reception beam of the downlink channel according to the first transmission beam; Receiving a downlink data channel or a downlink control channel from the network device using the first reception beam.

8. The method according to claim 7, wherein Receiving a downlink data channel or a downlink control channel using the first reception beam includes: Receiving the downlink data channel or the downlink control channel using the first reception beam on a symbol after a symbol interval between the last symbol carrying the pilot signal is greater than or equal to X symbols; wherein, X is an integer greater than or equal to 0.

9. The method according to claim 8, characterized in that, The X symbols are the time required for performing correlation detection of the pilot sequence and / or for performing beam switching.

10. The method according to any one of claims 2-9, characterized in that, The pilot resource includes at least one of the following: a channel state information reference signal (CSI-RS) resource, a synchronization signal block (SSB) resource, a tracking reference signal (TRS) resource, a phase noise tracking reference signal (PT-RS) resource, a demodulation reference signal (DMRS) resource, or a sounding reference signal (SRS) resource.

11. The method according to any one of claims 1 to 10, characterized in that, The configuration information is carried on at least one of the following: radio resource control (RRC) signaling, medium access control - control element (MAC-CE) signaling, or DCI.

12. A communication method, characterized in that, It includes: A network device sending configuration information to a terminal device; wherein, the configuration information is used to indicate the mapping relationship between a pilot sequence and a transmission beam; The network device sending a pilot signal to the terminal device; wherein, the pilot signal corresponds to a first pilot sequence, and the pilot sequence includes the first pilot sequence.

13. The method according to claim 12, characterized in that, The mapping relationship includes: the mapping relationship between the pilot sequence and a transmission configuration indication (TCI), or the mapping relationship between the pilot sequence and a pilot resource.

14. The method according to claim 13, wherein The pilot sequence is characterized by different scrambling identifiers, or by different parameter values of a sequence expression.

15. The method according to claim 13 or 14, characterized in that The pilot resource is a pilot resource configured by the network device for the terminal device, or a pilot resource corresponding to a pilot resource indication reported by the terminal device.

16. The method according to any one of claims 12-15, characterized in that, The method further includes: The network device uses a first transmission beam of a downlink channel to send a downlink data channel or a downlink control channel to the terminal device; wherein the transmission beam includes the first transmission beam.

17. The method according to any one of claims 13 - 16, characterized in that The pilot resource includes at least one of the following: a channel state information reference signal (CSI-RS) resource, a synchronization signal block (SSB) resource, a tracking reference signal (TRS) resource, a phase noise tracking reference signal (PT-RS) resource, a demodulation reference signal (DMRS) resource, or a sounding reference signal (SRS) resource.

18. The method according to any one of claims 12-17, characterized in that, The configuration information is carried in at least one of the following: Radio Resource Control (RRC) signaling, Medium Access Control - Control Element (MAC-CE) signaling, or Downlink Control Information (DCI).

19. A communication device, characterized in that, The communication device includes: a processor; wherein, The processor is configured to execute the communication method according to any one of claims 1-18.

20. A communication device, characterized in that, The communication device includes: a processor and a memory; the memory is configured to store computer instructions, and when the processor executes the instructions, the communication device is caused to execute the communication method according to any one of claims 1-18.

21. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a computer program or instructions, and when the computer program or instructions run on a computer, the computer is caused to execute the communication method according to any one of claims 1-18.

22. A computer program product, characterized in that, The computer program product includes: a computer program or instructions, and when the computer program or instructions run on a computer, the computer is caused to execute the communication method according to any one of claims 1-18.

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