Sounding reference signal sending method, resource allocation method and related equipment

Abstract

Disclosed are a sounding reference signal transmission method, a resource allocation method and a related device, which can be applied to a scene in which the uplink and downlink antenna structures of a terminal device are different, in the method, the terminal device transmits a first SRS and a second SRS through a first SRS resource and a second SRS resource configured by a network device, and the sending beam of the first SRS resource is different from the sending beam of the second SRS resource, so that the measurement requirement of downlink channel state information under the condition that the uplink and downlink antenna structures of the terminal equipment are different is met. Therefore, the downlink transmission based on the SRS is realized, and the cell-level capacity or the user-level capacity is improved.

Description

Technical Field

[0001] The present application relates to the field of wireless technology, and in particular to a method for sending a sounding reference signal, a resource configuration method, and related equipment. Background Art

[0002] Wireless communication can be a transmission communication between two or more communication nodes that is not transmitted through conductors or cables or is transmitted through air interfaces. For example, the communication nodes include network devices and terminal devices. Generally, the terminal device can access the network device and receive scheduling and instruction information from the network device to achieve wireless communication.

[0003] In the new radio (NR) protocol, downlink channel measurement information can be obtained in two ways. Method 1: The base station side sends a downlink channel state information reference signal (CSI-RS), and the terminal side performs channel estimation based on the CSI-RS, obtains the channel eigenvector, and quantizes and feeds back the obtained channel eigenvector based on the predefined codebook, and feeds back to the base station in the form of a precoding matrix indicator (PMI). Limited by the feedback overhead, the quantized PMI has a quantization loss compared to the actual channel eigenvector. Method 2: Assuming that the uplink and downlink channels are reciprocal, the base station side configures an uplink sounding reference signal (SRS) resource for the user, receives and measures the uplink SRS, performs uplink channel estimation, and equates the estimated uplink receiving channel to the downlink transmitting channel, and calculates the downlink transmitting weight.

[0004] However, with the current surge in communication needs, a trend is to increase the number of physical antennas to obtain higher array gain to improve user coverage or capacity requirements. Limited by the cost constraints of terminal equipment and the maximum uplink power limit, an effective implementation method is to increase the number of physical antennas and the number of downlink receiving digital channels, but not increase the number of uplink sending digital channels, to achieve downlink high RANK high capacity transmission and uplink high coverage transmission. At this time, there is a difference between the uplink and downlink antenna structures of the terminal equipment, that is, the number of physical antennas corresponding to each transmitting antenna port is not equal to the number of physical antennas corresponding to each receiving antenna port. However, in this case, the current standard protocol does not support this antenna structure. Summary of the invention

[0005] The present application provides an SRS sending method and related equipment, which is used to provide an SRS sending method when the uplink antenna architecture and downlink antenna architecture of the terminal device are asymmetric, and then calculate the downlink transmission data weighted value based on the SRS to achieve downlink transmission based on the SRS, thereby improving the cell or user-level capacity.

[0006] In a first aspect, the present application provides an SRS sending method, which is executed by a terminal device (or terminal), or the method is executed by some components in the terminal device (such as a processor, a chip or a chip system, etc.), or the method can also be implemented by a logic module or software that can realize all or part of the functions of the terminal device. In the first aspect and its possible implementation, the method is described as being executed by a terminal device. In the method, the terminal device receives first configuration information from a network device, and the first configuration information indicates a first SRS resource and a second SRS resource; the first configuration information is used for downlink channel state information measurement or for indicating that the terminal device sends an SRS by antenna switching; the terminal device sends a first SRS and a second SRS to the network device, the first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, the first SRS resource is different from the second SRS resource, and the transmission beam of the first SRS resource is different from the transmission beam of the second SRS resource.

[0007] Based on the above technical solution, the terminal device sends the first SRS through the first SRS resource configured by the network device and sends the second SRS through the second SRS resource, and the transmission beam of the first SRS resource is different from the transmission beam of the second SRS resource, thereby meeting the measurement requirements of downlink channel state information when there are differences in the uplink and downlink antenna structures of the terminal device. Then, the weighted value of downlink transmission data is calculated to realize downlink transmission based on SRS, thereby improving the cell or user-level capacity.

[0008] Optionally, in a possible implementation manner of the first aspect, the method further includes: determining the first SRS resource and the second SRS resource according to the first configuration information.

[0009] In this possible implementation, the terminal device determines the first SRS resource and the second SRS resource through the first configuration information sent by the network device, and then can use different beams to send SRS on the first SRS resource and the second SRS resource.

[0010] Optionally, in a possible implementation manner of the first aspect, the first SRS resource includes a first SRS port and a second SRS port, and the SRS resource includes a third SRS port and a fourth SRS port.

[0011] In this possible implementation, by configuring the port resources, the terminal device can use the port resources to transmit the SRS, which facilitates the terminal device to use the antenna port normally.

[0012] Optionally, in a possible implementation manner of the first aspect, the first SRS resource and the second SRS resource further satisfy at least one of the following:

[0013] The first SRS resource and the second SRS resource are associated with the same transmitting antenna; or

[0014] The first SRS resource and the second SRS resource are associated with different transmit beams; or

[0015] The transmitting antenna associated with at least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource is the same; or

[0016] At least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource are associated with different transmission beams.

[0017] In this possible implementation, by limiting the conditions of the above resources, the downlink channel information can be obtained based on the minimum SRS resource requirements. For example, different SRS resources use the orthogonal beams of the same antenna to send SRS. When the base station estimates the downlink channel weight, it offsets the influence of the SRS transmission weight by obtaining the channel autocorrelation matrix of the downlink transmitting base station side, thereby ensuring that the network equipment can correctly estimate the downlink channel information even if it does not perceive the antenna structure of the terminal device. For another example, in the case of the same antenna port, the SRS beam can be sent by using different weights of the same antenna port, which can improve the transmission signal strength of the SRS.

[0018] Optionally, in a possible implementation manner of the first aspect, the first configuration information further includes a third SRS resource, and the third SRS resource is associated with a different transmitting antenna than the first SRS resource and the second SRS resource.

[0019] In this possible implementation, the terminal device can send SRS through the first SRS resource, the second SRS resource and the third SRS resource, using a combination of antenna switching and beam switching, thereby achieving downlink channel information acquisition in a scenario where the number of uplink transmitting antennas is less than the number of downlink receiving antennas.

[0020] Optionally, in a possible implementation manner of the first aspect, protection symbols are configured between the different SRS resources, and at least one of the following is satisfied:

[0021] The first SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; or

[0022] The second SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; where Y is an integer greater than or equal to 1.

[0023] In this possible implementation, different SRS resources are spaced at least Y symbols apart, which complies with the restrictions on the guard interval in the existing protocol, thereby being compatible with the existing protocol and improving the adaptability of the solution.

[0024] Optionally, in a possible implementation manner of the first aspect, the value of the above Y is related to the subcarrier spacing.

[0025] In this possible implementation, the value of Y complies with the existing protocol, so that it can be compatible with the existing protocol and improve the adaptability of the solution.

[0026] Optionally, in a possible implementation manner of the first aspect, the above step: before receiving the first configuration information from the network device, the method further includes: sending capability information related to the antenna port of the terminal device.

[0027] In this possible implementation, the terminal device can report capability information so that the network device can better understand the terminal device, thereby facilitating the terminal device to obtain an SRS resource configuration that is more suitable for itself.

[0028] Optionally, in a possible implementation manner of the first aspect, the capability information includes at least one of the following:

[0029] The beamforming mode of the receiving antenna port of the terminal device is different from the beamforming mode of the transmitting antenna port; or

[0030] The number of transmit antennas associated with an uplink pilot port of the terminal device is not equal to the number of receive antennas associated with a downlink pilot port; or

[0031] The number of antenna ports for downlink reception of the terminal device is different from the number of antenna ports for uplink transmission; or

[0032] The number of physical antennas associated with each receiving RF chain and each transmitting RF chain of the terminal device is different; or

[0033] The downlink receiving antenna structure of the terminal device is different from the uplink transmitting antenna structure.

[0034] In this possible implementation, the terminal device can report specific capability information related to the antenna port, such as the number of uplink and downlink antenna ports, whether the number of physical antennas mapped to the receiving RF chain and the transmitting RF chain is the same, etc. This makes it easier for network devices to identify the capabilities of the terminal device, improve the accuracy of resource configuration, and improve the efficiency of resource configuration.

[0035] Optionally, in a possible implementation manner of the first aspect, the above-mentioned beamforming manner includes one or more of the following: digital domain beamforming, analog domain beamforming, and hybrid beamforming.

[0036] In this possible implementation, the scenarios of each beamforming can be improved, thereby improving the applicability of the solution.

[0037] Optionally, in a possible implementation manner of the first aspect, the number of protection symbols of the first SRS resource and the second SRS resource is less than Y symbols.

[0038] Furthermore, the guard interval between different SRS resources configured when the network device perceives the terminal device capability information is less than Y symbols. The guard interval between different SRS resources configured when the network device does not perceive the terminal device capability information is greater than or equal to Y symbols.

[0039] In this possible implementation, by controlling the guard interval to less than Y symbols, redundant resource configuration is reduced, and resource waste is reduced. In addition, the network device can report capability information related to the antenna port of the terminal device through the terminal device, thereby improving the perception capability of the network device and the accuracy of resource configuration.

[0040] Optionally, in a possible implementation manner of the first aspect, the terminal device receives or sends a signal within a protection symbol.

[0041] In this possible implementation, different SRS signals are sent through different beams of the same antenna set, and the switching of different beams of the same antenna set does not require the introduction of symbol-level protection intervals. Therefore, if there is a protection interval in the time domain resources occupied by different SRS resources configured by the network device, the terminal device can perform normal uplink transmission and / or downlink reception within the protection interval, thereby improving resource utilization and the communication capability of the terminal device.

[0042] The second aspect of the present application provides a resource configuration method, which is executed by a network device, or the method is executed by some components in the network device (such as a processor, a chip or a chip system, etc.), or the method can also be implemented by a logic module or software that can realize all or part of the network device functions. In the second aspect and its possible implementation, the method is described as being executed by a network device. In the method, first configuration information is sent to a terminal device, the first configuration information indicates a first SRS resource and a second SRS resource, and the first configuration information is used to configure downlink channel state information measurement; the first SRS and the second SRS sent by the terminal device are received, the first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, and the transmit beam of the first SRS resource is different from the transmit beam of the second SRS resource.

[0043] Based on the above technical solution, the network device can configure the first SRS resource and the second SRS resource for the terminal device, so as to meet the measurement requirements of the downlink channel state information when the uplink and downlink antenna structures of the terminal device are different. Then, the weighted value of the downlink transmission data is calculated to realize the downlink transmission based on SRS, and improve the cell or user-level capacity.

[0044] Optionally, in a possible implementation manner of the second aspect, the method further includes: determining first configuration information.

[0045] Optionally, in a possible implementation manner of the second aspect, the above steps further include: receiving capability information from a terminal device, where the capability information is related to an antenna port of the terminal device.

[0046] In this possible implementation, the network device can sense the capability information of the terminal device, and then configure SRS resources for the user, which can meet the measurement requirements of downlink channel state information when the uplink and downlink antenna structures of the terminal device are different. Then, the weighted value of downlink transmission data is calculated to realize downlink transmission based on SRS, thereby improving the cell or user-level capacity.

[0047] Optionally, in a possible implementation manner of the second aspect, the capability information includes at least one of the following:

[0048] The beamforming mode of the receiving antenna port of the terminal device is different from the beamforming mode of the transmitting antenna port; or

[0049] The number of transmit antennas associated with an uplink pilot port of the terminal device is not equal to the number of receive antennas associated with a downlink pilot port; or

[0050] The number of antenna ports for downlink reception of the terminal device is different from the number of antenna ports for uplink transmission; or

[0051] The number of physical antennas associated with each receiving RF chain and each transmitting RF chain of the terminal device is different; or

[0052] The downlink receiving antenna structure of the terminal device is different from the uplink transmitting antenna structure.

[0053] In this possible implementation, the terminal device can report specific capability information related to the antenna port, such as the number of uplink and downlink antenna ports, whether the number of physical antennas mapped to the receiving RF chain and the transmitting RF chain is the same, etc. This makes it easier for network devices to identify the capabilities of the terminal device, improve the accuracy of resource configuration, and improve the efficiency of resource configuration.

[0054] Optionally, in a possible implementation manner of the second aspect, the above-mentioned beamforming manner includes one or more of the following: digital domain beamforming, analog domain beamforming, and hybrid beamforming.

[0055] In this possible implementation, the scenarios of each beamforming can be improved, thereby improving the applicability of the solution.

[0056] Optionally, in a possible implementation manner of the second aspect, the above step of: determining the first configuration information includes: determining the first configuration information according to capability information of the terminal device.

[0057] In this possible implementation, the network device specifies the capabilities of the terminal device, so as to match the first configuration information related to the capabilities of the terminal device, thereby improving the accuracy of resource configuration and improving the efficiency of configuring resources.

[0058] Optionally, in a possible implementation manner of the second aspect, the above steps further include: configuring pilot resources for beam management or quasi-co-location type QCL-type D reference signals to the terminal device based on the capability information.

[0059] In this possible implementation, the network device may configure corresponding pilot resources for the terminal device according to the capability information reported by the terminal device, so that the configured pilot resources can meet the antenna system architecture of the terminal device.

[0060] Optionally, in a possible implementation manner of the second aspect, the above steps configure the pilot resources and / or quasi co-location type QCL-typeD reference signal for beam management to the terminal device based on the capability information, including:

[0061] When the beamforming mode of the transmitting antenna port of the terminal device is hybrid beamforming, and when the beamforming mode of the receiving antenna port of the terminal device is digital domain beamforming, only the pilot resources and / or QCL-typeD reference signals for beam management are configured for uplink transmission, and the pilot resources and / or QCL-typeD reference signals for beam management are not configured for downlink transmission.

[0062] In this possible implementation, when hybrid beamforming is used for uplink transmission and digital domain beamforming is used for downlink transmission, pilot resources and / or QCL-typeD reference signals for beam management are only configured for uplink transmission, and pilot resources and / or QCL-typeD reference signals for beam management are not configured for downlink transmission, thereby reducing resource waste and improving resource utilization.

[0063] Optionally, in a possible implementation manner of the second aspect, the number of protection symbols of the first SRS resource and the second SRS resource is less than Y symbols.

[0064] In this possible implementation, by controlling the guard interval to less than Y symbols, redundant resource configuration is reduced, and resource waste is reduced. In addition, the network device can report capability information related to the antenna port of the terminal device through the terminal device, thereby improving the perception capability of the network device and the accuracy of resource configuration.

[0065] Optionally, in a possible implementation manner of the second aspect, the above-mentioned protection symbol is used for a terminal device to receive or send a signal.

[0066] In this possible implementation, different SRS signals are sent through different beams of the same antenna set, and the switching of different beams of the same antenna set does not require the introduction of symbol-level protection intervals. Therefore, if there is a protection interval in the time domain resources occupied by different SRS resources configured by the network device, the terminal device can perform normal uplink transmission and / or downlink reception within the protection interval, thereby improving resource utilization and the communication capability of the terminal device.

[0067] Optionally, in a possible implementation manner of the second aspect, the first SRS resource includes a first SRS port and a second SRS port, and the second SRS resource includes a third SRS port and a fourth SRS port.

[0068] In this possible implementation, the network device configures the port resources through the terminal device capability information, so that the terminal device can use the port resources to transmit the SRS, which facilitates the terminal device to use the antenna port normally.

[0069] Optionally, in a possible implementation manner of the second aspect, the first SRS resource and the second SRS resource further satisfy at least one of the following:

[0070] The first SRS resource and the second SRS resource are associated with the same transmitting antenna; or

[0071] The first SRS resource and the second SRS resource are associated with different transmit beams; or

[0072] The transmitting antenna associated with at least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource is the same; or

[0073] At least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource are associated with different transmission beams.

[0074] In this possible implementation, by limiting the conditions of the above resources, the downlink channel information can be obtained based on the minimum SRS resource requirements. For example, different SRS resources use the orthogonal beams of the same antenna to send SRS. When the base station estimates the downlink channel weight, it offsets the influence of the SRS transmission weight by obtaining the channel autocorrelation matrix of the downlink transmitting base station side, thereby ensuring that the network equipment can correctly estimate the downlink channel information even if it does not perceive the antenna structure of the terminal device. For another example, in the case of the same antenna port, the SRS beam can be sent by using different weights of the same antenna port, which can improve the transmission signal strength of the SRS.

[0075] Optionally, in a possible implementation manner of the second aspect, the first configuration information further includes a third SRS resource, and the third SRS resource is associated with a different transmitting antenna than the first SRS resource and the second SRS resource.

[0076] In this possible implementation, the terminal device can send SRS through the first SRS resource, the second SRS resource and the third SRS resource configured by the network device, using a combination of antenna switching and beam switching, thereby achieving downlink channel information acquisition in a scenario where the number of uplink co-transmitting antennas is less than the number of downlink receiving antennas.

[0077] Optionally, in a possible implementation manner of the second aspect, protection symbols are configured between the different SRS resources, and at least one of the following conditions is met:

[0078] The first SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; or

[0079] The second SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; where Y is an integer greater than or equal to 1.

[0080] In this possible implementation, different SRS resources are spaced at least Y symbols apart, which complies with the restrictions on the guard interval in the existing protocol, thereby being compatible with the existing protocol and improving the adaptability of the solution.

[0081] Optionally, in a possible implementation manner of the second aspect, the value of the above Y is related to the subcarrier spacing.

[0082] In this possible implementation, the value of Y complies with the existing protocol, so that it can be compatible with the existing protocol and improve the adaptability of the solution.

[0083] The third aspect of the present application provides a communication device, which is a terminal device, or the device is a partial component (such as a processor, a chip or a chip system, etc.) in the terminal device, or the device is a logic module or software that can realize all or part of the functions of the terminal device. The communication device includes a transceiver unit.

[0084] The transceiver unit is used to receive first configuration information from a network device, where the first configuration information indicates a first SRS resource and a second SRS resource; the first configuration information is used for downlink channel state information measurement or for instructing a terminal device to send an SRS by antenna switching;

[0085] The transceiver unit is also used to send a first SRS and a second SRS to the network device, the first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, and the transmission beam of the first SRS resource is different from the transmission beam of the second SRS resource.

[0086] Optionally, in a possible implementation manner of the third aspect, the terminal device further includes: a processing unit, configured to determine the first SRS resource and the second SRS resource according to the first configuration information.

[0087] Optionally, in a possible implementation manner of the third aspect, the first SRS resource includes a first SRS port and a second SRS port, and the second SRS resource includes a third SRS port and a fourth SRS port.

[0088] Optionally, in a possible implementation manner of the second aspect, the first SRS resource and the second SRS resource further satisfy at least one of the following:

[0089] The first SRS resource and the second SRS resource are associated with the same transmitting antenna; or

[0090] The first SRS resource and the second SRS resource are associated with different transmit beams; or

[0091] At least one antenna port of the first SRS resource is associated with the same transmit antenna as at least one antenna port of the second SRS resource; or

[0092] At least one antenna port of the first SRS resource and at least one antenna port of the second SRS resource are associated with different transmission beams.

[0093] Optionally, in a possible implementation manner of the third aspect, the first configuration information further includes a third SRS resource, and the third SRS resource is associated with a different transmitting antenna than the first SRS resource and the second SRS resource.

[0094] Optionally, in a possible implementation manner of the third aspect, protection symbols are configured between the different SRS resources, and at least one of the following is satisfied:

[0095] The first SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; or

[0096] The second SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; where Y is an integer greater than or equal to 1.

[0097] Optionally, in a possible implementation manner of the third aspect, the value of the above Y is related to the subcarrier spacing.

[0098] Optionally, in a possible implementation manner of the third aspect, the above-mentioned transceiver unit is also used to send capability information related to the antenna port of the terminal device.

[0099] Optionally, in a possible implementation manner of the third aspect, the capability information includes at least one of the following:

[0100] The beamforming mode of the receiving antenna port of the terminal device is different from the beamforming mode of the transmitting antenna port; or

[0101] The number of transmit antennas associated with an uplink pilot port of the terminal device is not equal to the number of receive antennas associated with a downlink pilot port; or

[0102] The downlink transmission capability of the terminal device is different from the uplink reception capability; or

[0103] The number of antenna ports for downlink reception of the terminal device is different from the number of antenna ports for uplink transmission; or

[0104] The number of physical antennas associated with each receiving RF chain and each transmitting RF chain of the terminal device is different; or

[0105] The downlink receiving antenna structure of the terminal device is different from the uplink transmitting antenna structure.

[0106] Optionally, in a possible implementation manner of the third aspect, the above-mentioned beamforming manner includes one or more of the following: digital domain beamforming, analog domain beamforming, and hybrid beamforming.

[0107] Optionally, in a possible implementation manner of the third aspect, the number of protection symbols of the first SRS resource and the second SRS resource is less than Y symbols.

[0108] Optionally, in a possible implementation manner of the third aspect, the above-mentioned transceiver unit is further used to receive or send a signal within a protection symbol.

[0109] In a fourth aspect, the present application provides a communication device, which is a network device, or a partial component (such as a processor, a chip or a chip system) in a network device, or a logic module or software that can implement all or part of the network device functions. The communication device includes a transceiver unit.

[0110] Among them, the transceiver unit is used to send first configuration information to the terminal device, the first configuration information indicates the first SRS resource and the second SRS resource, and the first configuration information is used to configure the downlink channel state information measurement; the transceiver unit is also used to receive the first SRS and the second SRS sent by the terminal device, the first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, and the transmission beam of the first SRS resource is different from the transmission beam of the second SRS resource.

[0111] Optionally, in a possible implementation manner of the fourth aspect, the above-mentioned transceiver unit is also used to receive capability information from the terminal device, and the capability information is related to the antenna port of the terminal device.

[0112] Optionally, in a possible implementation manner of the fourth aspect, the capability information includes at least one of the following:

[0113] The beamforming mode of the receiving antenna port of the terminal device is different from the beamforming mode of the transmitting antenna port; or

[0114] The number of transmit antennas associated with an uplink pilot port of the terminal device is not equal to the number of receive antennas associated with a downlink pilot port; or

[0115] The number of antenna ports for downlink reception of the terminal device is different from the number of antenna ports for uplink transmission; or

[0116] The number of physical antennas associated with each receiving RF chain and each transmitting RF chain of the terminal device is different; or

[0117] The downlink receiving antenna structure of the terminal device is different from the uplink transmitting antenna structure.

[0118] Optionally, in a possible implementation manner of the fourth aspect, the above-mentioned beamforming method includes one or more of the following: digital domain beamforming, analog domain beamforming, and hybrid beamforming.

[0119] Optionally, in a possible implementation of the fourth aspect, the above-mentioned transceiver unit is also used to configure pilot resources for beam management or quasi-co-location type QCL-typeD reference signals to the terminal device based on the capability information.

[0120] Optionally, in a possible implementation of the fourth aspect, the above-mentioned transceiver unit is specifically used to configure only the pilot resources and / or QCL-typeD reference signals for beam management for uplink transmission when the beamforming mode of the transmitting antenna port of the terminal device is hybrid beamforming and when the beamforming mode of the receiving antenna port of the terminal device is digital domain beamforming, and the pilot resources and / or QCL-typeD reference signals for beam management are not configured for downlink transmission.

[0121] Optionally, in a possible implementation manner of the fourth aspect, the protection symbols of the first SRS resource and the second SRS resource are less than Y symbols.

[0122] Optionally, in a possible implementation manner of the fourth aspect, the above-mentioned protection symbol is used for a terminal device to receive or send a signal.

[0123] Optionally, in a possible implementation manner of the fourth aspect, the first SRS resource includes a first SRS port and a second SRS port, and the second SRS resource includes a third SRS port and a fourth SRS port.

[0124] Optionally, in a possible implementation manner of the fourth aspect, the first SRS resource and the second SRS resource further satisfy at least one of the following:

[0125] The first SRS resource and the second SRS resource are associated with the same transmitting antenna; or

[0126] The first SRS resource and the second SRS resource are associated with different transmit beams; or

[0127] The transmitting antenna associated with at least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource is the same; or

[0128] At least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource are associated with different transmission beams.

[0129] Optionally, in a possible implementation manner of the fourth aspect, the first configuration information further includes a third SRS resource, and the third SRS resource is associated with a different transmitting antenna than the first SRS resource and the second SRS resource.

[0130] Optionally, in a possible implementation manner of the fourth aspect, protection symbols are configured between the different SRS resources, and at least one of the following conditions is met:

[0131] The first SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; or

[0132] The second SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; where Y is an integer greater than or equal to 1.

[0133] Optionally, in a possible implementation of the fourth aspect, the value of the above Y is related to the subcarrier spacing.

[0134] The fifth aspect of the present application provides a communication device, comprising at least one processor, at least one processor coupled to a memory; the memory is used to store programs or instructions; the at least one processor is used to execute the program or instructions so that the device implements a method of any possible implementation method of the first aspect described above.

[0135] In a sixth aspect of the present application, a communication device is provided, comprising at least one processor, wherein the at least one processor is coupled to a memory; the memory is used to store programs or instructions; and the at least one processor is used to execute the program or instructions so that the device implements a method of any possible implementation method in the aforementioned second aspect.

[0136] In a seventh aspect, the present application provides a communication device, comprising at least one logic circuit and an input / output interface; the logic circuit is used to execute the method described in any possible implementation manner of the first aspect.

[0137] In an eighth aspect, the present application provides a communication device, comprising at least one logic circuit and an input / output interface; the logic circuit is used to execute a method as any possible implementation method in the second aspect described above.

[0138] A ninth aspect of the present application provides a communication system, which includes a terminal device of any possible implementation method in the fifth aspect and a network device of any possible implementation method in the sixth aspect, or includes a terminal device of any possible implementation method in the seventh aspect and a network device of any possible implementation method in the eighth aspect.

[0139] In a tenth aspect, the present application provides a computer-readable storage medium, which is used to store one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes a method as described in any possible implementation of any aspect of the first or second aspect above.

[0140] In an eleventh aspect of the present application, a computer program product (or computer program) is provided. When the computer program in the computer program product is executed by the processor, the processor executes the method described in any possible implementation of any one of the first or second aspects above.

[0141] A twelfth aspect of the present application provides a chip system, which includes at least one processor, and is used to support a communication device to implement the method described in any possible implementation method of any aspect of the first aspect or the second aspect.

[0142] In one possible design, the chip system may also include a memory for storing program instructions and data necessary for the communication device. The chip system may be composed of a chip, or may include a chip and other discrete devices. Optionally, the chip system also includes an interface circuit, which provides program instructions and / or data for at least one processor.

[0143] Among them, the technical effects brought about by any design method in the third aspect to the twelfth aspect can refer to the technical effects brought about by the different design methods in the above-mentioned first aspect and second aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0144] Figure 1A A schematic diagram of a communication system involved in this application;

[0145] Figure 1B Another schematic diagram of the communication system involved in this application;

[0146] Figure 1C Another schematic diagram of the communication system involved in this application;

[0147] Figure 2 Another schematic diagram of the communication system involved in this application;

[0148] Figure 3 A schematic diagram of sending an SRS signal involved in this application;

[0149] Figure 4 A schematic diagram of the SRS sending method provided in this application;

[0150] Figures 5 to 8 Several schematic diagrams of resource configurations provided for this application;

[0151] Figures 9 to 12 Several schematic diagrams of sending SRS by the terminal device provided in this application;

[0152] Figures 13 to 16 Several schematic diagrams of the communication device provided for this application. DETAILED DESCRIPTION

[0153] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0154] First, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0155] 1. Beam

[0156] The beam can be called a spatial domain filter, a spatial filter, a spatial domain parameter, a spatial parameter, a spatial parameter, a spatial domain setting, a spatial setting, a quasi-colocation (QCL) information, a QCL assumption, or a QCL indication in the NR protocol. The beam can be indicated by a transmission configuration indicator state (TCI-state) parameter or by a spatial relation parameter. Therefore, in the present application, the beam can be replaced by a spatial filter, a spatial filter, a spatial parameter, a spatial parameter, a spatial setting, a spatial setting, a quasi-colocation (QCL) information, a QCL assumption, a QCL indication, a TCI-state (including uplink (UL) TCI state, downlink TCI state, DL TCI state), or a spatial relation. The above terms are also equivalent to each other. Beam can also be replaced by other terms representing beam, which is not limited in this application.

[0157] A beam used to transmit a signal may be referred to as a transmission beam (Tx beam), 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. A downlink transmit beam may be indicated by a TCI-state. An uplink transmit beam may be indicated by any one of a spatial relation, a TCI-state, and an SRS resource (indicating a transmit beam using the SRS). Therefore, the uplink transmit beam may also be replaced by an SRS resource.

[0158] A beam used to receive a signal may be referred to as a reception beam (Rx beam), a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter or a spatial reception parameter, a spatial domain reception setting, or a spatial reception setting.

[0159] For example, a transmit beam may refer to the distribution of signal strength in different directions of space after a signal is transmitted through an antenna, and a receive beam may refer to the distribution of signal strength in different directions of space of a wireless signal received from an antenna. It is understandable that a beam may be associated with one or more physical antennas, corresponding to one or more antenna ports. For example, for a CSI-RS resource used for beam management, a CSI-RS resource may contain one or more ports, and a CSI-RS resource corresponds to a beam, that is, all ports in the same CSI-RS resource correspond to the same beam.

[0160] When the transmitter uses low-frequency or medium-frequency bands, it can send signals omnidirectionally or at a wider angle. When using high-frequency bands, thanks to the smaller carrier wavelength of the high-frequency communication system, an antenna array consisting of many antenna elements can be arranged at the transmitter and receiver. The transmitter sends signals with a certain beamforming weight, so that the transmitted signal forms a beam with spatial directivity. At the same time, the antenna array is used at the receiver to receive the signal with a certain beamforming weight. This is beneficial to increase the received power of the signal at the receiver and combat path loss.

[0161] Beams generally correspond to resources. For example, when performing beam measurement, the network device uses different beams to send signals on different resources. The terminal device feeds back the measured signal quality of different resources, and the network device knows the quality of the corresponding beam. During data transmission, beam information is also indicated by its corresponding resources. For example, the network device indicates the information of the physical downlink shared channel (PDSCH) beam of the terminal device through the TCI field in the downlink control information (DCI).

[0162] Optionally, one beam may include one or more antenna ports for transmitting a data channel, a control channel, a sounding signal, etc. One or more antenna ports forming a beam may also be regarded as an antenna port set.

[0163] A beam is a communication resource. A beam can be a wide beam, a narrow beam, or other types of beams. The technology for forming the beam can be beamforming technology or other technical means. The beamforming technology can specifically be digital beamforming technology, analog beamforming technology, and hybrid digital / analog beamforming technology. Different beams can be considered as different resources.

[0164] 2. Antenna port

[0165] One antenna port may correspond to one physical antenna or multiple physical antennas. Different antenna ports may correspond to different beams of the same physical antenna, or to different physical antennas, or to different parts of the physical antenna; or to different pilot signals.

[0166] According to the 3rd Generation Partnership Project (3GPP) specification definition, the definition of antenna ports allows the channel on which a symbol on the same antenna port is transmitted to be inferred from the channel on which another symbol on the same antenna port is transmitted.

[0167] The “antenna port” in the embodiments of the present application refers to a “logical antenna port” unless a “physical antenna port” is specified.

[0168] In addition, the number of physical antenna ports mapped to the antenna port under different antenna architectures is different.

[0169] 3. Antenna structure

[0170] The antenna structure can also be called the antenna architecture, which is mainly used to characterize the mapping relationship between the antenna port and the physical antenna. The mapping relationship can be one or more of the following:

[0171] The correspondence between antenna ports and physical antennas is fixed;

[0172] The correspondence between antenna ports and physical antennas is variable;

[0173] One antenna port is associated with multiple physical antennas;

[0174] One antenna port is associated with one physical antenna;

[0175] The number of physical antennas associated with one antenna port can be switched dynamically;

[0176] Digital beam forming (DBF) architecture: DBF architecture can be understood as beamforming by weighting the signal in the baseband digital domain.

[0177] Analog beam forming (ABF) architecture. ABF architecture can be understood as weighting the RF signal through the phase shifter and gain controller at the antenna end (or through signal delay), thereby achieving beamforming;

[0178] Hybrid beamforming (HBF) architecture: The HBF architecture can be understood as a structure that combines the above-mentioned DBF architecture with the ABF architecture.

[0179] 4. Antenna port switching method

[0180] The switching modes of the antenna port of the terminal device include antenna switching, beam switching, and the combination of antenna switching and beam switching. Among them, antenna switching means that the terminal device needs to control different physical antennas to send signals by switching switches. Beam switching means adjusting the weighted value of the physical antenna, which can also be understood as using different weighted values ​​to send signals on the same physical antenna. In general, the switching switch used for antenna switching is often a physical switch (also called a hard switch), so the switching of the antenna requires a delay, and generally a processing delay of Y symbols is required between the time-frequency domain resources used by different physical antennas (the value of Y will be described later and will not be expanded here). The weight switching used for beam switching is a non-physical switch, and the processing delay is much smaller than the processing delay caused by the physical switch switching. Therefore, the protection interval required in the case of beam switching is much smaller than Y symbols. The current 3GPP protocol can complete beam switching within the cyclic prefix (cyclic prefix, CP) of each orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol by default, so beam switching does not need to occupy additional symbol resources as a protection interval.

[0181] In the embodiment of the present application, it can be applied to the DBF architecture for downlink and the HBF architecture for uplink. It can also be applied to the HBF architecture for downlink and the HBF architecture for uplink, but the mapping relationship between the antenna port and the physical antenna of the uplink HBF architecture and the downlink HBF architecture is different.

[0182] 5. Configuration and pre-configuration

[0183] In this application, configuration and pre-configuration are used at the same time. Configuration refers to the network device / server sending some parameter configuration information or parameter values ​​to the terminal through messages or signaling, so that the terminal can determine the communication parameters or resources during transmission based on these values ​​or information. Pre-configuration is similar to configuration, and can be parameter information or parameter values ​​pre-negotiated between the network device / server and the terminal device, or parameter information or parameter values ​​used by the base station / network device or terminal device specified by the standard protocol, or parameter information or parameter values ​​pre-stored in the base station / server or terminal device. This application does not limit this.

[0184] Furthermore, these values ​​and parameters can be changed or updated.

[0185] 6. The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated with each other are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, "at least one of A, B and C" includes A, B, C, AB, AC, BC or ABC. And, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects.

[0186] See also Figure 1A , is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. Figure 1A As shown, the communication system includes a radio access network (RAN) 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The RAN 100 includes at least one RAN node (such as Figure 1A 110a and 110b in the figure, collectively referred to as 110), and may also include at least one terminal (such as Figure 1A RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment ( Figure 1A (not shown in the figure). The terminal 120 is connected to the RAN node 110 by wireless means, and the RAN node 110 is connected to the core network 200 by wireless or wired means. The core network device in the core network 200 and the RAN node 110 in the RAN 100 may be independent and different physical devices, or may be the same physical device that integrates the logical functions of the core network device and the logical functions of the RAN node. Terminals and terminals and RAN nodes and RAN nodes may be connected to each other by wired or wireless means.

[0187] RAN100 may be an evolved universal terrestrial radio access (E-UTRA) system, an NR system, or a future radio access system defined in 3GPP. RAN100 may also include two or more of the above different radio access systems. RAN100 may also be an open RAN (open RAN, O-RAN).

[0188] RAN node, also known as radio access network equipment, RAN entity or access node, is used to help terminals access the communication system wirelessly. In one application scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in the fifth generation (5G) mobile communication system, a next generation NodeB in the sixth generation (6G) mobile communication system, or a base station in a future mobile communication system. RAN nodes can be macro base stations (such as Figure 1A 110a), or a micro base station or an indoor station (such as Figure 1A 110b) in the figure, it can also be a relay node or a donor node.

[0189] In another application scenario, the cooperation of multiple RAN nodes can be used to help the terminal achieve wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU) or a radio unit (RU). The CU here completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete the functions of part of the physical layer or all of the physical layer. For the specific description of the above-mentioned various protocol layers, please refer to the relevant technical specifications of 3GPP. RU can be used to implement the transceiver function of radio frequency signals. CU and DU can be two independent RAN nodes, or they can be integrated in the same RAN node, such as integrated in a baseband unit (BBU). RU can be included in a radio frequency device, such as a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0190] In different systems, RAN nodes may have different names. For example, in an O-RAN system, CU may be called an open CU (open CU, O-CU), DU may be called an open DU (open DU, O-DU), and RU may be called an open RU (open RU, O-RU). The RAN nodes in the embodiments of the present application may be implemented by software modules, hardware modules, or a combination of software modules and hardware modules. For example, the RAN node may be a server loaded with corresponding software modules. The embodiments of the present application do not limit the specific technology and specific device form adopted by the RAN node.

[0191] In addition, a RAN node may also be referred to as a network device, which is a device deployed in a wireless access network to provide wireless communication functions for a terminal device. Network devices may include various forms of macro base stations, micro base stations (also known as small stations), relay stations, access points, etc. In systems using different wireless access technologies, the names of network devices may be different, such as eNB or eNodeB (Evolutional NodeB) in Long Term Evolution (LTE). The network device may also be a wireless controller in a cloud radio access network (CRAN) scenario. The network device may also be a base station device in a future 5G network or a network device in a future evolved PLMN network. The network device may also be a wearable device or a vehicle-mounted device. The network device may also be a transmission and reception point (TRP). In addition, in a network structure, the network device may include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node. For ease of description, a base station is used as an example of a RAN node for description below.

[0192] A terminal is a device with wireless transceiver function, which can send signals to a base station or receive signals from a base station. A terminal can also be called a terminal device, user equipment (UE), a mobile station, a mobile terminal, etc. The terminal can be widely used in various scenarios, for example, device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal.

[0193] Base stations and terminals can be fixed or movable. Base stations and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on airplanes, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0194] The roles of the base station and the terminal can be relative, for example, Figure 1A The helicopter or drone 120i in the figure can be configured as a mobile base station. For the terminal 120j that accesses the wireless access network 100 through 120i, the terminal 120i is a base station; but for the base station 110a, 120i is a terminal, that is, 110a and 120i communicate through the wireless air interface protocol. Of course, 110a and 120i can also communicate through the interface protocol between base stations. In this case, relative to 110a, 120i is also a base station. Therefore, base stations and terminals can be collectively referred to as communication devices. Figure 1A 110a and 110b in the figure may be referred to as communication devices having base station functions. Figure 1A 120a-120j in the figure can be called communication devices with terminal functions.

[0195] Base stations and terminals, base stations and base stations, and terminals and terminals can communicate through authorized spectrum, unauthorized spectrum, or both; they can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0196] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem including the base station function. The control subsystem including the base station function here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or a modem) in the terminal, or by a device including the terminal function.

[0197] It can be understood that the RAN 100 has been described above as including at least one RAN node (such as Figure 1A 110a and 110b in the figure, collectively referred to as 110), and may also include at least one terminal (such as Figure 1A 120a-120j in the figure are collectively referred to as 120).

[0198] In one possible implementation, Figure 1A The communication system shown can also be Figure 1B As shown, it includes a RAN node 110 and multiple terminals (such as Figure 1B In this case, a single RAN node may transmit data or control signaling to a single terminal or multiple terminals.

[0199] In another possible implementation, Figure 1A The communication system shown can also be Figure 1C As shown, it includes multiple RAN nodes (such as Figure 1C 110A, 110B and 110C in FIG. 110 and a terminal 120. In this case, multiple RAN nodes may also transmit data or control signaling for a single terminal at the same time.

[0200] Figures 1A to 1C The communication between each network device and each terminal device in the communication system shown can also be expressed in another form, such as Figure 2As shown, the terminal device 10 includes a processor 101, a memory 102 and a transceiver 103, and the transceiver 103 includes a transmitter 1031, a receiver 1032 and an antenna 1033. The network device 20 includes a processor 201, a memory 202 and a transceiver 203, and the transceiver 203 includes a transmitter 2031, a receiver 2032 and an antenna 2033. 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.

[0201] Currently, in the NR protocol, downlink channel measurement information can be obtained in the following two ways:

[0202] Method 1: The base station sends a downlink CSI-RS, and the terminal performs channel estimation based on the CSI-RS to obtain a channel feature vector. The obtained channel feature vector is quantized and fed back based on a predefined codebook, and is fed back to the base station in the form of a PMI. Due to the feedback overhead, the quantized PMI has a quantization loss compared to the actual channel feature vector.

[0203] Method 2: Assuming that the uplink and downlink channels are reciprocal, the base station configures uplink SRS resources for the user, performs uplink channel estimation through uplink SRS reception measurement, and equates the estimated uplink reception channel to the downlink transmission channel.

[0204] Compared with the first method, the downlink channel obtained based on SRS in the second method has no quantization loss. Without considering the uplink and downlink reciprocity error, the performance is better than the PMI based on CSI-RS feedback.

[0205] The following is a more detailed description of the above method 2:

[0206] In the prior art, the correspondence between uplink and downlink antenna ports is determined by the UE capability reporting parameter "supportedSRS-xTyR", where y>=x, y means that the total number or subset of UE receiving antennas is y antenna ports, and y can also be called the number of antenna ports that can be received simultaneously in the downlink; x means that SRS can be sent on x antenna ports selected from the y antenna ports, and x can also be called the number of antenna ports that can be sent simultaneously in the uplink. Among them, x can also be understood as the number of antenna ports that can perform uplink transmission behavior simultaneously, and y can also be understood as the total number of antenna ports that can perform uplink transmission behavior.

[0207] When x = y, it is considered that the same antenna port is used for uplink transmission and downlink reception; when x < y, it is considered that the uplink transmission antenna port is a subset of the downlink reception antenna port. At this time, (ceiling(y / x)) SRS resources need to be configured for the user, and multiple SRS resources will be configured for the user. Different SRS resources use different antenna ports to send SRS signals. The base station side obtains the uplink channel measurement information based on the SRS signals sent by multiple SRS resources, and based on the uplink-downlink channel reciprocity assumption, the estimated uplink reception channel is equivalent to the downlink transmission channel.

[0208] Exemplarily, for the Figure 3 2T4R scenario shown, a SRS resource set (resource set or resourceSet) with usage = antennaSwitching is configured for the user, which contains two SRS resources (resource), and each SRS resource contains two SRS ports; the time-frequency resources allocated to the first SRS resource use antenna port 1 and antenna port 2 to send SRS signals, and the time-frequency resources allocated to the second SRS resource use antenna port 3 and antenna port 4 to send SRS signals. The base station side performs SRS reception measurement on the time-frequency resources allocated by these 2 SRS resources, estimates the downlink transmission channel, and calculates the downlink data transmission weight vector.

[0209] Considering the antenna switching processing time of the terminal device, a guard interval of Y symbols will be configured between SRS resources sent by different antennas, where Y is an integer greater than or equal to 1. Specifically, if two SRS resources or SRS resource sets used for antenna switching are allocated to be transmitted in the same time slot, Y guard symbols need to be configured for the user in the time slot resources occupied by the two SRS resources. If two SRS resources or SRS resource sets used for antenna switching are allocated to be transmitted in different time slots, it is required that there be a separation of Y guard symbols between the last symbol occupied by the first SRS resource and the first symbol occupied by the second SRS resource. On the Y guard symbols, the user does not transmit any signals.

[0210] Specifically, the value of Y is related to the subcarrier spacing, and the protocol is defined as shown in Table 1 below:

[0211] Table 1

[0212] μ <![CDATA[Δf=2 μ ·15[kHz]]]> Y 0 15 1 1 30 1 2 60 1 3 120 8 5 480 7 6 960 14

[0213] Among them, Δf represents the subcarrier spacing, and μ represents the parameter set, which is used to describe the subcarrier spacing type.

[0214] Multiple SRS resources are configured for users for antenna switching. Each SRS resource corresponds to a specific subset of antenna ports for transmission. The protocol has no constraints and users can make their own decisions. For example, in a 2T4R scenario, the first SRS resource may correspond to antenna ports 1 and 2 to send SRS signals, and the second SRS resource may correspond to antenna ports 3 and 4 to send SRS signals; or the first SRS resource may correspond to antenna ports 1 and 3 to send SRS signals, and the second SRS resource may correspond to antenna ports 2 and 4 to send SRS signals.

[0215] However, with the current surge in communication needs, the trend is to meet communication needs by increasing the number of physical antennas. Since the number or cost of increasing antennas in terminal devices is limited, it is more reasonable for the terminal and the base station to use methods such as HBF for uplink and DBF for downlink. However, this will lead to differences (or be understood as differences) in the uplink and downlink antenna structures of the terminal device, that is, the number of physical antennas corresponding to each uplink transmitting port is not equal to the number of physical antennas corresponding to each downlink receiving port, and the current protocol does not support this situation. Therefore, how to measure the downlink channel quality when there are differences in the uplink and downlink antenna structures of the terminal device is a technical problem that needs to be solved urgently.

[0216] In order to solve the above technical problems, the embodiment of the present application provides an SRS sending method, in which, when the uplink antenna architecture and the downlink antenna architecture of the terminal device are asymmetric, the terminal device sends the first SRS and the second SRS through the first SRS resource configured by the network device, and the transmission beam of the first SRS resource is different from the transmission beam of the second SRS resource, thereby meeting the measurement requirements of the downlink channel state information when there are differences in the uplink and downlink antenna structures of the terminal device. Then, the weighted value of the downlink transmission data is calculated to realize downlink transmission based on SRS, thereby improving the cell or user-level capacity.

[0217] The SRS sending method provided in the embodiment of the present application is described below. The method can be executed by a terminal device / cloud device, or by a component of the terminal device / cloud device (such as a processor, chip, or chip system, etc.). Of course, the method can also be executed by a system consisting of a cloud device and a terminal device.

[0218] See also Figure 4 , a flow chart of an SRS sending method provided in an embodiment of the present application, the method may include step 401 and step 402. Step 401 and step 402 are described in detail below.

[0219] Step 401: The network device sends first configuration information to the terminal device. Correspondingly, the terminal device receives the first configuration information from the network device.

[0220] The network device sends first configuration information to the terminal device for downlink channel state information measurement. The first configuration information is used to configure the uplink SRS resource of the terminal device, that is, the first configuration information is used for downlink channel state information measurement or instructs the terminal device to send SRS in an antenna switching manner, and the uplink SRS resource includes the first SRS resource and the second SRS resource.

[0221] This step can also be understood as the network device configuring uplink SRS resources for the terminal device, thereby facilitating subsequent network devices to perform uplink channel estimation through uplink SRS reception measurement, equating or fine-tuning the estimated uplink reception channel to obtain a downlink transmission channel, and then calculating the downlink transmission weight.

[0222] Optionally, the first SRS resource includes a first SRS port and a second SRS port, and the second SRS resource includes a third SRS port and a fourth SRS port. Alternatively, it can be understood that different resources are configured for the same SRS antenna port, so that the same SRS antenna port sends different SRSs through different beams on different resources, that is, different weighted values ​​are used to send SRSs on the same physical antenna.

[0223] Optionally, the first SRS resource and the second SRS resource further satisfy at least one of the following:

[0224] The first SRS resource and the second SRS resource are associated with the same transmitting antenna; or

[0225] The first SRS resource and the second SRS resource are associated with different transmit beams; or

[0226] The transmitting antenna associated with at least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource is the same; or

[0227] At least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource are associated with different transmission beams.

[0228] Optionally, the first configuration information is also used to indicate a third SRS resource, and the third SRS resource is associated with a different transmitting antenna than the first SRS resource and the second SRS resource. Alternatively, it is understood that since the first SRS resource and the third SRS resource may involve switching antennas, the first SRS resource and the third SRS resource have different transmitting antennas. Similarly, since the second SRS resource and the third SRS resource may involve switching antennas, the second SRS resource and the third SRS resource have different transmitting antennas.

[0229] It can be understood that the different transmission beams include the transmission beams being orthogonal to each other and the transmission beams being non-orthogonal. Alternatively, it can be understood that beam orthogonality is a special case of beams being different. Generally, beam orthogonality can be understood as the inner product of the weight vectors between the beams being equal to 0.

[0230] Optionally, the same transmitting antenna means using the same physical antenna and sending SRS with different or same weights; different transmitting antennas means using completely different or partially different physical antennas and sending SRS with different or same weights; different transmitting beams means using the same physical antenna and sending SRS with different weights.

[0231] It is understandable that since the switching of the antenna switching mode will bring about the problem of processing delay, the network device can configure protection symbols between each SRS resource sent by the terminal device. Usually, at least Y protection symbols are configured as the protection interval. That is, the first SRS resource is spaced at least Y symbols from the third SRS resource; and / or the second SRS resource is spaced at least Y symbols from the third SRS resource.

[0232] Further, in the case where the first configuration information includes the first SRS resource, the second SRS resource, and the third SRS resource, the network device may configure protection symbols between different SRS resources, and at least one of the following is satisfied: the first SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; the second SRS resource and the third SRS resource are separated by at least Y symbols in the time domain. Wherein, Y is an integer greater than or equal to 1, and the value of Y is related to the subcarrier spacing. For details, please refer to the corresponding description of the aforementioned Table 1, which will not be repeated here.

[0233] In one possible implementation, the SRS transmission method used by the terminal device estimated by the network device is different from the actual transmission method of the terminal device. For example, the network device estimates that the terminal device uses antenna switching to send SRS, while the terminal device actually uses beam switching, or a combination of antenna switching and beam switching to send SRS. At this time, the network device does not perceive the specific antenna port capabilities of the terminal device related to transmission or reception. The antenna port capabilities of the terminal device for uplink transmission and downlink reception may be the same or different.

[0234] In another possible implementation, the SRS transmission method used by the terminal device estimated by the network device is the same as the actual transmission method of the terminal device. For example, the network device estimates that the terminal device uses antenna switching, beam switching, or a combination of antenna switching and beam switching to send SRS, and the terminal device actually uses the corresponding method to send SRS. At this time, the network device optionally needs to perceive the specific antenna port capabilities of the terminal device related to transmission or reception.

[0235] It should be noted that how the network device perceives the actual SRS sending method of the terminal device can be pre-negotiated between the network device and the terminal device, or determined by receiving capability information related to the antenna port of the terminal device reported by the terminal device, or other methods, which are not limited here.

[0236] Optionally, the terminal device reports capability information related to the antenna port of the terminal device to the network device. Accordingly, the network device receives the capability information from the terminal device. The capability information includes at least one of the following:

[0237] The beamforming mode of the receiving antenna port of the terminal device is different from the beamforming mode of the transmitting antenna port; or

[0238] The number of transmit antennas associated with an uplink pilot port of the terminal device is not equal to the number of receive antennas associated with a downlink pilot port; or

[0239] The number of antenna ports for downlink reception of the terminal device is different from the number of antenna ports for uplink transmission; or

[0240] The number of physical antennas associated with each receiving RF chain and each transmitting RF chain of the terminal device is different; or

[0241] The downlink receiving antenna structure of the terminal device is different from the uplink transmitting antenna structure.

[0242] The beamforming method includes one or more of the following: digital beamforming, analog beamforming, and hybrid beamforming.

[0243] In the embodiment of the present application, there are multiple situations for the first configuration information, which are described below respectively:

[0244] The first one is that the protection interval between each SRS resource configured by the network device for the terminal device is greater than or equal to Y protection symbols.

[0245] The network device configures (y / x) SRS resources for the terminal device, and the interval between the time domain resources occupied by different SRS resources is greater than or equal to Y protection symbols. The description of x and y can refer to the above description, which will not be repeated here.

[0246] For ease of understanding, the following example illustrates SRS resource.

[0247] Example 1, x=2, y=4. The SRS resource in Example 1 can be as follows Figure 5As shown, the network device configures 1 SRS resource set for the terminal device, and the SRS resource set includes 2 SRS resources, namely SRSresource#0 and SRS resource#1. Each SRS resource includes 2 SRS ports, namely port#1 and port#2. The time domain symbol occupied by SRS resource#0 and the time domain symbol occupied by SRS resource#1 are separated by Y protection symbols, that is, the interval between the end symbol in the time domain resource occupied by SRS resource#0 and the start symbol in the time domain resource occupied by SRS resource#1 is Y symbols.

[0248] Example 2, x=2, y=8. The SRS resource in Example 2 can be as follows Figure 6 As shown, the network device configures 1 SRS resource set for the terminal device, and the SRS resource set includes 4 SRS resources, namely SRSresource#0, SRS resource#1, SRS resource#2 and SRS resource#3. Each SRS resource includes 2 SRS ports, namely port#1 and port#2. The time domain symbol occupied by SRS resource#0 is separated from the time domain symbol occupied by SRS resource#1 by Y protection symbols, the time domain symbol occupied by SRS resource#1 is separated from the time domain symbol occupied by SRS resource#2 by Y protection symbols, and the time domain symbol occupied by SRS resource#2 is separated from the time domain symbol occupied by SRS resource#3 by Y protection symbols.

[0249] Optionally, this method can be applicable to the case where the network device does not perceive the asymmetry between the uplink antenna architecture and the downlink antenna architecture of the terminal device. Since the network device still configures resources according to the antenna switching method, and the antenna switching method requires processing delay caused by switch switching, the network device still configures the protection interval between each SRS resource for the terminal device according to the prior art method to be greater than or equal to Y protection symbols. The description of the above "perception" will be described after the subsequent step 402, and will not be expanded here.

[0250] The second type is that the guard interval between each SRS resource configured by the network device for the terminal device is less than Y guard symbols.

[0251] The network device configures (y / x) SRS resources for the terminal device, and the time domain resource interval occupied by different SRS resources is less than Y protection symbols. The description of x and y can refer to the above description, which will not be repeated here.

[0252] Optionally, in this manner, time domain symbols occupied by different SRS resources in the same SRS resource set are adjacent to each other.

[0253] For ease of understanding, the following example illustrates SRS resource.

[0254] Example 3, x=2, y=4, Y=1. The SRS resource in Example 3 can be as follows Figure 7 As shown, the network device configures 1 SRS resource set for the terminal device, and the SRS resource set includes 2 SRS resources, namely SRS resource#0 and SRS resource#1. Each SRS resource includes 2 SRS ports, namely port#1 and port#2. The time domain symbol occupied by SRS resource#0 is adjacent to the time domain symbol occupied by SRS resource#1, that is, the end symbol in the time domain resource occupied by SRS resource#0 is adjacent to the start symbol in the time domain resource occupied by SRS resource#1.

[0255] Optionally, this method can be applied to the situation where the network device perceives that the uplink antenna architecture and the downlink antenna architecture of the terminal device are asymmetric. Since the network device can configure resources in a beam switching manner, and since the beam switching manner does not require processing delays caused by switch switching, only the weighting vector needs to be changed, the processing delay is low. This allows the network device to configure each SRS resource of the terminal device with a protection interval in the time domain that is less than Y protection symbols, that is, the protection symbols of the first SRS resource and the second SRS resource in the time domain are less than Y symbols. And the terminal device can receive or send signals within the protection interval, so that resources can be fully utilized and resource waste can be reduced.

[0256] The third type is that the network device configures some SRS resources for the terminal device with a time domain protection interval greater than or equal to Y protection symbols, and some SRS resources with a time domain protection interval less than Y protection symbols.

[0257] The network device configures (y / x) SRS resources for the terminal device, the time domain resource interval occupied by some SRS resources is less than Y protection symbols, and the time domain resource interval occupied by some SRS resources is greater than or equal to Y protection symbols. The description of x and y can refer to the above description and will not be repeated here.

[0258] Example 4, x=2, y=8. The SRS resource in Example 4 can be as follows Figure 8 As shown, the network device configures 1 SRS resource set for the terminal device, and the SRS resource set includes 4 SRS resources, namely SRSresource#0, SRS resource#1, SRS resource#2 and SRS resource#3. Each SRS resource includes 2 SRS ports, namely port#1 and port#2. The time domain symbol occupied by SRS resource#0 is adjacent to the time domain symbol occupied by SRS resource#1. The time domain symbol occupied by SRS resource#1 is separated from the time domain symbol occupied by SRS resource#2 by Y protection symbols. The time domain symbol occupied by SRS resource#2 is adjacent to the time domain symbol occupied by SRS resource#3.

[0259] Optionally, this method can be applicable to the situation where the network device senses that the uplink antenna architecture and the downlink antenna architecture of the terminal device are asymmetric.

[0260] It is understandable that the above-mentioned cases are just examples. In actual applications, there may be other cases. For example, multiple SRS resources may belong to different SRS resource sets. For another example, the number of configured SRS resources is not (y / x), but other values ​​specified in the new protocol. For another example, the setting of Y protection symbols is other values ​​specified in the new protocol, etc., which are not specifically limited here.

[0261] Step 402: The terminal device sends a first SRS and a second SRS to the network device. Correspondingly, the network device receives the first SRS and the second SRS from the terminal device.

[0262] The terminal device sends the first SRS and the second SRS to the network device according to the first configuration information, the first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, and the transmission beam of the first SRS resource is different from the transmission beam of the second SRS resource.

[0263] Optionally, corresponding to the case where the first SRS resource includes the first SRS port and the second SRS port, and the second SRS resource includes the third SRS port and the fourth SRS port, the terminal device sends the corresponding beam using the first SRS port and the second SRS port.

[0264] Optionally, the physical antenna associated with the first SRS port of the first SRS resource is the same as the physical antenna associated with the third SRS port of the second SRS resource; the physical antenna associated with the second SRS port of the first SRS resource is the same as the physical antenna associated with the fourth SRS port of the second SRS resource; the physical antenna associated with the first SRS port of the first SRS resource is different from the physical antenna associated with the fourth SRS port of the second SRS resource.

[0265] Optionally, the transmission beams of the first SRS port of the first SRS resource and the third SRS port of the second SRS resource are orthogonal; the transmission beams of the second SRS port of the first SRS resource and the fourth SRS port of the second SRS resource are orthogonal. Beam orthogonality means that the inner product of the weight vectors between beams is equal to 0.

[0266] Optionally, when the network device perceives capability information related to the antenna port of the terminal device, the network device configures corresponding pilot resources for uplink and downlink transmissions, including: for the terminal device using the DBF architecture, it is not necessary to configure beam scanning and / or QCL-type D (typeD) indication ('typeD': {Spatial Rx parameter}, used to indicate the spatial reception parameters of the receiving end), and / or for the terminal device using the HBF architecture, it is necessary to configure beam scanning and / or configure QCL-typeD indication for the receiving and transmitting behavior.

[0267] Optionally, the network device configures pilot resources and / or quasi-co-location type QCL-typeD reference signals for beam management to the terminal device based on capability information related to the antenna port of the terminal device. Exemplarily, when the beamforming mode of the transmitting antenna port of the terminal device is hybrid beamforming, and when the beamforming mode of the receiving antenna port of the terminal device is digital domain beamforming, the network device configures the pilot resources and / or the QCL-typeD reference signals for beam management for uplink transmission, and does not configure the pilot resources and / or the QCL-typeD reference signals for beam management for downlink transmission.

[0268] In the embodiment of the present application, in addition to the above-mentioned method of sending SRS by beam switching, the terminal device can also send SRS by combining beam switching with antenna switching, etc., which is not limited here. It is understandable that in order to match the method of the prior art, the terminal device can also send SRS by antenna switching. The above-mentioned methods of sending SRS are described below.

[0269] The first method is to send SRS by beam switching.

[0270] In this manner, the terminal device sends the SRS corresponding to the first SRS port of the first SRS resource based on the first beam, sends the SRS corresponding to the second SRS port of the first SRS resource based on the second beam, sends the SRS corresponding to the third SRS port of the second SRS resource based on the third beam, and sends the SRS corresponding to the fourth SRS port of the second SRS resource based on the fourth beam. It should be noted that the first SRS port of the first SRS resource and the third SRS port of the second SRS resource may be the same or different; similarly, the second SRS port of the first SRS resource and the fourth SRS port of the second SRS resource may be the same or different.

[0271] Optionally, the weighting vector of the first beam is different from or orthogonal to the weighting vector of the third beam, and the weighting vectors of the second beam and the fourth beam are different from or orthogonal to each other.

[0272] This method can also be understood as using the same physical antenna set between different SRS resources and sending SRS signals in different beams.

[0273] For example, assuming x=2, y=4, the terminal device may send SRS by beam switching as follows: Fig. 9 As shown, the terminal device uses 4 antenna ports for downlink reception and 2 antenna ports for uplink transmission; each downlink antenna port is associated with 1 physical antenna, and each uplink antenna port is associated with 2 physical antennas. Physical antennas 1 and 2 are used on the time-frequency domain resources allocated to SRS port #0 of SRS resource#0 to send SRS signals based on weighting vector W1, physical antennas 3 and 4 are used on the time-frequency domain resources allocated to SRS port #1 of SRS resource#0 to send SRS signals based on weighting vector W2, physical antennas 1 and 2 are used on the time-frequency domain resources allocated to SRS port #0 of SRSresource#1 to send SRS signals based on weighting vector W3, and physical antennas 3 and 4 are used on the time-frequency domain resources allocated to SRS port #1 of SRS resource#1 to send SRS signals based on weighting vector W4.

[0274] Optionally, weight vectors W1 and W3 are orthogonal, and weight vectors W2 and W4 are orthogonal.

[0275] Optionally, one of W3 and W1 is the same as one of the weight vectors of W2 and W4.

[0276] Optionally, the RF channel (RF chain) corresponding to SRS port #0 is simultaneously associated with physical antenna 1 and physical antenna 2, and the RF channel corresponding to SRS port #0 is simultaneously associated with physical antenna 3 and physical antenna 4. Different SRS signals are sent using the same antenna set (i.e., physical antenna 1, physical antenna 2, physical antenna 3, and physical antenna 4) using different weighting values. Since the switching of different weighting values ​​of the same antenna set does not require the introduction of symbol-level protection intervals, if there is a protection interval for the time domain resources occupied by different SRS resources configured by the network device, the terminal device can perform normal uplink transmission and / or downlink reception within the protection interval, thereby improving resource utilization.

[0277] The second method is to send SRS by combining beam switching with antenna switching.

[0278] In this manner, the terminal device sends the SRS corresponding to the first SRS resource and the second SRS resource based on the first antenna set, and sends the SRS corresponding to the third SRS resource based on the second antenna set; illustratively, the terminal device sends the SRS corresponding to the first SRS port of the first SRS resource and the third SRS port of the second SRS resource based on the first antenna subset of the first antenna set, sends the SRS corresponding to the second SRS port of the first SRS resource and the fourth SRS port of the second SRS resource based on the second antenna subset of the first antenna set, sends the SRS corresponding to the first SRS port of the third SRS resource based on the first antenna subset of the second antenna set, and sends the SRS corresponding to the second SRS port of the third SRS resource based on the second antenna subset of the second antenna set. The physical antennas associated with the first antenna set are partially different from or completely different from the physical antennas associated with the second antenna set.

[0279] This method can also be understood as using different antennas + the same weighting, or the same antenna + different weighting to send the SRS signal.

[0280] For example, assuming x=2, y=8, the terminal device may send SRS by combining beam switching and antenna switching as follows: Fig.10As shown, the terminal device uses 8 antenna ports for downlink reception and 2 antenna ports for uplink transmission; each downlink antenna port is associated with 1 physical antenna, and each uplink antenna port is associated with 2 physical antennas. Physical antennas 1 and 2 are used to send SRS signals based on weighting vector W1 on the time-frequency domain resources allocated to SRS port #0 of SRS resource#0; physical antennas 3 and 4 are used to send SRS signals based on weighting vector W2 on the time-frequency domain resources allocated to SRS port #1 of SRS resource#0; physical antennas 1 and 2 are used to send SRS signals based on weighting vector W3 on the time-frequency domain resources allocated to SRS port #0 of SRS resource#1; physical antennas 3 and 4 are used to send SRS signals based on weighting vector W4 on the time-frequency domain resources allocated to SRS port #1 of SRS resource#1; physical antennas 5 and 6 are used to send SRS signals based on weighting vector W5 on the time-frequency domain resources allocated to SRS port #0 of SRS resource#2; On the time-frequency domain resources allocated to SRS port #1 of resource#2, physical antennas 7 and 8 are used to send SRS signals based on weighting vector W6; on the time-frequency domain resources allocated to SRS port #0 of SRSresource#3, physical antennas 5 and 6 are used to send SRS signals based on weighting vector W7; on the time-frequency domain resources allocated to SRS port #1 of SRS resource#3, physical antennas 7 and 8 are used to send SRS signals based on weighting vector W8.

[0281] Optionally, weight vectors W1 and W3 are orthogonal, weight vectors W2 and W4 are orthogonal, weight vectors W5 and W7 are orthogonal, weight vectors W6 and W8 are orthogonal, and weight vectors W1, W2, W3, W4, W5, W6, W7, and W8 are partially identical.

[0282] Optionally, the radio frequency channel corresponding to the first SRS port of SRS resource#0 is associated with both physical antenna 1 and physical antenna 2, the radio frequency channel corresponding to the second SRS port of SRS resource#0 is associated with both physical antenna 3 and physical antenna 4, and so on.

[0283] Optionally, SRS resource#0 and SRS resource#1 use the same antenna set and different weighting values ​​to send SRS signals. And / or SRS resource#2 and SRS resource#3 use the same antenna set and different weighting values ​​to send SRS signals. Since the switching of different weighting values ​​of the same antenna set does not require the introduction of symbol-level protection intervals, if the time domain resources occupied by SRS resource#0 and SRS resource#1 configured by the network device have a protection interval, or the time domain resources occupied by SRS resource#2 and SRS resource#3 have a protection interval, the terminal device can perform normal uplink transmission or downlink reception within the above-mentioned protection interval, thereby improving resource utilization.

[0284] Exemplarily, SRS resource#0 and SRS resource#2 or SRS resource#3 use different antennas to send SRS signals, and the antenna for sending the SRS signal is dynamically selected by switching. The switching of the antenna associated with the transmission channel requires a processing delay of Y symbols. If there is a protection interval in the time domain resources occupied by SRS resource#0 and SRS resource#2, SRSresource#0 and SRS resource#3, SRS resource#1 and SRS resource#2, or SRS resource#1 and SRS resource#3 configured by the network device, the terminal device does not perform any uplink transmission or downlink reception behavior within the protection interval.

[0285] The third method is to send SRS by switching antennas.

[0286] This is to increase the completeness of the solution, or to facilitate the adaptation of existing technologies.

[0287] In this manner, the terminal device sends SRS corresponding to the first SRS port and the second SRS port of the first SRS resource based on the first antenna set, and sends SRS corresponding to the third SRS port and the fourth SRS port of the second SRS resource based on the second antenna set.

[0288] This method can also be understood as using different antennas to send SRS signals.

[0289] For example, assuming x=2, y=4, the terminal device may send SRS by switching antennas as follows: Fig.11As shown, the terminal device uses 4 antenna ports for downlink reception and 2 antenna ports for uplink transmission; each antenna port can be associated with 1 physical antenna, and physical antenna 1 is used to send SRS signals on the time-frequency domain resources allocated to SRS port #0 of SRS resource#0, and physical antenna 3 is used to send SRS signals on the time-frequency domain resources allocated to SRS port #1 of SRS resource#0, and physical antenna 2 is used to send SRS signals on the time-frequency domain resources allocated to SRS port #0 of SRS resource#1, and physical antenna 4 is used to send SRS signals on the time-frequency domain resources allocated to SRS port #1 of SRS resource#1.

[0290] Optionally, physical antenna 1 and physical antenna 2 are connected to the same RF channel, and a switch is used to dynamically select whether the transmission channel uses physical antenna 1 to send signals or physical antenna 2 to send signals. Physical antenna 3 and physical antenna 4 are connected to the same RF channel, and a switch is used to dynamically select whether the transmission channel uses physical antenna 3 to send signals or physical antenna 4 to send signals. The switching of the antenna associated with the transmission channel requires a processing delay of Y symbols, during which the terminal device does not perform any uplink transmission or downlink reception behavior.

[0291] For example, assuming x=2, y=8, the terminal device may send SRS by switching antennas as follows: Fig.12As shown, the terminal device uses 8 antenna ports for downlink reception and 2 antenna ports for uplink transmission; each antenna port can be associated with 1 physical antenna, and physical antenna 1 is used to send SRS signals on the time-frequency domain resources allocated by SRS port #0 of SRS resource#0, and physical antenna 3 is used to send SRS signals on the time-frequency domain resources allocated by SRS port #1 of SRS resource#0, and physical antenna 2 is used to send SRS signals on the time-frequency domain resources allocated by SRS port #0 of SRS resource#1, and physical antenna 4 is used to send SRS signals on the time-frequency domain resources allocated by SRS port #0 of SRS resource#1. The physical antenna 4 is used to send the SRS signal on the time-frequency domain resources allocated by the SRS port #1 of resource#1, the physical antenna 5 is used to send the SRS signal on the time-frequency domain resources allocated by the SRS port #0 of SRSresource#2, the physical antenna 7 is used to send the SRS signal on the time-frequency domain resources allocated by the SRS port #1 of SRSresource#2, the physical antenna 6 is used to send the SRS signal on the time-frequency domain resources allocated by the SRS port #0 of SRSresource#3, and the physical antenna 8 is used to send the SRS signal on the time-frequency domain resources allocated by the SRS port #1 of SRSresource#3. Optionally, the physical antenna 1 and the physical antenna 2 are connected to the same radio frequency channel, and the switch is used to dynamically select whether the transmission channel uses the physical antenna 1 to send the signal or the physical antenna 2 to send the signal; the physical antenna 3 and the physical antenna 4 are connected to the same radio frequency channel, and the switch is used to dynamically select whether the transmission channel uses the physical antenna 3 to send the signal or the physical antenna 4 to send the signal, and so on. The switching of the antenna associated with the transmission channel requires a processing delay of Y symbols, during which the terminal device does not perform any uplink transmission or downlink reception.

[0292] It can be understood that in the above example, each antenna port can also be associated with multiple physical antennas, x can also be other values, y can also be other values, etc., which are not specifically limited here.

[0293] In the embodiment of the present application, on the one hand, when the uplink antenna architecture and the downlink antenna architecture of the terminal device are asymmetric, the first SRS is sent through the first SRS resource configured by the network device and the second SRS is sent through the second SRS resource, and the transmission beam of the first SRS resource is different from the transmission beam of the second SRS resource, thereby meeting the measurement requirements of downlink channel state information when there are differences in the uplink and downlink antenna structures of the terminal device. Then, the weighted value of the downlink transmission data is calculated to realize downlink transmission based on SRS, thereby improving the cell or user-level capacity.

[0294] On the other hand, different SRS signals are sent using different weighting values ​​through the same antenna set, and since the switching of different weighting values ​​of the same antenna set does not require the introduction of symbol-level protection intervals, if there is a protection interval in the time domain resources occupied by different SRS resources configured by the network device, the terminal device can perform normal uplink transmission and / or downlink reception within the protection interval, thereby improving resource utilization and the communication capability of the terminal device.

[0295] On the other hand, network devices can improve the perception capabilities of network devices and the accuracy of resource configuration by reporting capability information related to the antenna ports of terminal devices through terminal devices, thereby reducing redundant resource configuration and reducing resource waste.

[0296] On the other hand, for terminal devices using the DBF architecture, there is no need to configure beam scanning and QCL-typeD indication, thereby reducing the configuration information content.

[0297] On the other hand, the method provided in the present application can also combine antenna switching with beam antennas to send SRS in a variety of possible ways, thereby making subsequent downlink calculations based on SRS more comprehensive and improving communication quality.

[0298] The SRS sending method in the embodiment of the present application is described above. The communication device in the embodiment of the present application is described below. Fig.13 , an embodiment of the communication device 1300 in the embodiment of the present application, the communication device 1300 can implement the functions of the communication device in the above method embodiment (the communication device is a terminal device), and thus can also achieve the beneficial effects of the above method embodiment. In the embodiment of the present application, the communication device 1300 can be a communication device, or an integrated circuit or component inside the communication device, such as a chip. The communication device 1300 includes: a transceiver unit 1301 and a processing unit 1302.

[0299] In a possible implementation, the communication device 1300 is the aforementioned Figures 1A to 12 In the terminal device in the embodiment shown, the functions of each unit in this case are as follows:

[0300] The transceiver unit 1301 is used to receive first configuration information from a network device, where the first configuration information indicates a first SRS resource and a second SRS resource; the first configuration information is used to configure an uplink SRS resource of a terminal device, where the uplink SRS resource is used for downlink channel state information measurement or for instructing the terminal device to send an SRS by antenna switching;

[0301] The processing unit 1302 is configured to generate a first SRS and a second SRS.

[0302] The transceiver unit 1301 is also used to send the first SRS and the second SRS to the network device. The first SRS resource is used to carry the first SRS, and the second SRS resource is used to carry the second SRS. The first SRS resource is different from the second SRS resource, and the transmission beam of the first SRS resource is different from the transmission beam of the second SRS resource.

[0303] Optionally, the first SRS resource includes a first SRS port and a second SRS port, and the second SRS resource includes a third SRS port and a fourth SRS port.

[0304] Optionally, the first SRS resource and the second SRS resource further satisfy at least one of the following:

[0305] The first SRS resource and the second SRS resource are associated with the same transmitting antenna; or

[0306] The first SRS resource and the second SRS resource are associated with different transmit beams; or

[0307] The transmitting antenna associated with at least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource is the same; or

[0308] At least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource are associated with different transmission beams.

[0309] Optionally, the first configuration information is further used to indicate a third SRS resource, and the third SRS resource is associated with a different transmitting antenna than the first SRS resource and the second SRS resource.

[0310] Optionally, protection symbols are configured between different SRS resources, and at least one of the following conditions is satisfied:

[0311] The first SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; or

[0312] The second SRS resource and the third SRS resource are separated by at least Y symbols in the time domain;

[0313] Wherein, Y is an integer greater than or equal to 1.

[0314] Optionally, the value of Y is related to the subcarrier spacing.

[0315] Optionally, the transceiver unit 1301 is also used to send capability information related to the antenna port of the terminal device.

[0316] Optionally, the capability information includes at least one of the following:

[0317] The beamforming mode of the receiving antenna port of the communication device is different from the beamforming mode of the transmitting antenna port; or

[0318] The number of transmitting antennas associated with an uplink pilot port of the communication device is not equal to the number of receiving antennas associated with a downlink pilot port; or

[0319] The downlink transmission capability and uplink reception capability of the communication device are different; or

[0320] The number of antenna ports for downlink reception of the communication device is different from the number of antenna ports for uplink transmission; or

[0321] The number of physical antennas associated with each receiving RF chain and each transmitting RF chain of the communication device is different; or

[0322] The downlink receiving antenna structure of the communication device is different from the uplink transmitting antenna structure.

[0323] Optionally, the beamforming method includes one or more of the following: digital domain beamforming, analog domain beamforming, and hybrid beamforming.

[0324] Optionally, the number of protection symbols of the first SRS resource and the second SRS resource is less than Y symbols.

[0325] Optionally, the transceiver unit 1301 is further configured to receive or send a signal within a protection symbol.

[0326] In this embodiment, the operations performed by each unit in the communication device are the same as those described above. Figures 1A to 12 The description of the terminal device in the illustrated embodiment is similar and will not be repeated here.

[0327] In this embodiment, when the uplink antenna architecture of the terminal device is asymmetric to the downlink antenna architecture, the first SRS is sent through the first SRS resource configured by the network device and the second SRS is sent through the second SRS resource, and the sending spatial domain filtering of the first SRS resource is different from the sending spatial domain filtering of the second SRS resource, thereby meeting the measurement requirements of the downlink channel state information when there are differences in the uplink and downlink antenna structures of the terminal device. Then the weighted value of the downlink transmission data is calculated to realize downlink transmission based on SRS, thereby improving the cell or user-level capacity. On the other hand, different SRS signals are sent by using different weighted values ​​through the same antenna set, and the switching of different weighted values ​​of the same antenna set does not require the introduction of symbol-level protection intervals. Therefore, if there is a protection interval in the time domain resources occupied by different SRS resources configured by the network device, the terminal device can perform normal uplink transmission and / or downlink reception behavior within the protection interval, thereby improving the utilization of resources and the communication capability of the terminal device. On the other hand, the network device can report the capability information related to the antenna port of the terminal device through the terminal device, improve the perception capability of the network device and the accuracy of resource configuration, thereby reducing redundant configuration of resources and reducing resource waste. On the other hand, for the terminal device using the DBF architecture, there is no need to configure beam scanning and QCL-typeD indication, thereby reducing the configuration information content. On the other hand, the method provided in this application can also combine antenna switching with beam antennas to send SRS in a variety of possible ways, thereby making subsequent downlink calculations based on SRS more comprehensive and improving communication quality.

[0328] In another possible implementation, the communication device 1300 is the aforementioned Figures 1A to 12 In the network device of the embodiment shown, the functions of each unit in this case are as follows:

[0329] The transceiver unit 1301 is configured to send first configuration information to a terminal device, where the first configuration information indicates a first SRS resource and a second SRS resource, and the first configuration information is used to configure downlink channel state information measurement;

[0330] The transceiver unit 1301 is also used to receive the first SRS and the second SRS sent by the terminal device, the first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, and the transmission beam of the first SRS resource is different from the transmission beam of the second SRS resource.

[0331] The processing unit 1302 is configured to determine first configuration information.

[0332] Optionally, the above-mentioned transceiver unit 1301 is also used to receive capability information from a terminal device, where the capability information is related to an antenna port of the terminal device.

[0333] Optionally, the capability information includes at least one of the following:

[0334] The beamforming mode of the receiving antenna port of the terminal device is different from the beamforming mode of the transmitting antenna port; or

[0335] The number of transmit antennas associated with an uplink pilot port of the terminal device is not equal to the number of receive antennas associated with a downlink pilot port; or

[0336] The number of antenna ports for downlink reception of the terminal device is different from the number of antenna ports for uplink transmission; or

[0337] The number of physical antennas associated with each receiving RF chain and each transmitting RF chain of the terminal device is different; or

[0338] The downlink receiving antenna structure of the terminal device is different from the uplink transmitting antenna structure.

[0339] Optionally, the processing unit 1302 is further configured to determine the first configuration information according to capability information of the terminal device.

[0340] Optionally, the above-mentioned beamforming methods include one or more of the following: digital domain beamforming, analog domain beamforming, and hybrid beamforming.

[0341] Optionally, the above-mentioned transceiver unit 1301 is also used to configure pilot resources for beam management or quasi-co-location type QCL-type D reference signals to the terminal device based on the capability information.

[0342] Optionally, the above-mentioned transceiver unit 1301 is specifically used to configure only the pilot resources and / or QCL-typeD reference signals for beam management for uplink transmission when the beamforming mode of the transmitting antenna port of the terminal device is hybrid beamforming and when the beamforming mode of the receiving antenna port of the terminal device is digital domain beamforming, and the pilot resources and / or QCL-typeD reference signals for beam management are not configured for downlink transmission.

[0343] Optionally, the number of protection symbols of the first SRS resource and the second SRS resource is less than Y symbols.

[0344] Optionally, the above protection symbol is used for a terminal device to receive or send a signal.

[0345] Optionally, the first SRS resource includes a first SRS port and a second SRS port, and the second SRS resource includes a third SRS port and a fourth SRS port.

[0346] Optionally, the first SRS resource and the second SRS resource further satisfy at least one of the following conditions:

[0347] The first SRS resource and the second SRS resource are associated with the same transmitting antenna; or

[0348] The first SRS resource and the second SRS resource are associated with different transmit beams; or

[0349] The transmitting antenna associated with at least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource is the same; or

[0350] At least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource are associated with different transmission beams.

[0351] Optionally, the first configuration information further includes a third SRS resource, and the third SRS resource is associated with a different transmitting antenna than the first SRS resource and the second SRS resource.

[0352] Optionally, protection symbols are configured between the above different SRS resources, and at least one of the following conditions is met:

[0353] The first SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; or

[0354] The second SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; where Y is an integer greater than or equal to 1.

[0355] Optionally, the value of the above Y is related to the subcarrier spacing.

[0356] In this embodiment, the operations performed by each unit in the communication device are the same as those described above. Figures 1A to 12 The description of the network devices in the illustrated embodiment is similar and will not be repeated here.

[0357] In this embodiment, the network device can determine the antenna port related information of the terminal device through the capability information reported by the terminal device, and the network device can configure the first SRS resource and the second SRS resource for the terminal device based on the capability information, so as to meet the measurement requirements of the downlink channel state information when there are differences in the uplink and downlink antenna structures of the terminal device. Then, the weighted value of the downlink transmission data is calculated to realize the downlink transmission based on SRS, and improve the cell or user-level capacity.

[0358] See also Fig.14 , is another schematic structural diagram of the communication device 1400 provided in the present application, the communication device 1400 includes a logic circuit 1401 and an input / output interface 1402. The communication device 1400 may be a chip or an integrated circuit.

[0359] in, Fig.13 The transceiver unit 1301 shown may be a communication interface, which may be Fig.14 The input / output interface 1402 in the communication interface may include an input interface and an output interface. Alternatively, the communication interface may also be a transceiver circuit, which may include an input interface circuit and an output interface circuit. Fig.13 The processing unit 1302 may be Fig.14 The logic circuit 1401 in.

[0360] Optionally, when the communication device is a terminal device in the aforementioned embodiment, the logic circuit 1401 is used to determine the first SRS resource and the second SRS resource according to the first configuration information. The input and output interface 1402 is used to receive the configuration information and send the first SRS and the second SRS. Among them, the configuration information includes the first SRS resource and the second SRS resource; the first configuration information is used for downlink channel state information measurement or antenna switching. The first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, the first SRS resource is different from the second SRS resource, and the transmit beam of the first SRS resource is different from the transmit beam of the second SRS resource.

[0361] Optionally, when the communication device is the network device in the above embodiment, the logic circuit 1401 is used to determine the first configuration information. The input and output interface 1402 is used to receive capability information, send the first configuration information, and receive the first SRS and the second SRS.

[0362] Among them, the logic circuit 1401 and the input and output interface 1402 can also execute other steps executed by the terminal device or the network device in any embodiment and achieve corresponding beneficial effects, which will not be repeated here.

[0363] Optionally, the logic circuit 1401 may be a processing device, and the functions of the processing device may be partially or completely implemented by software. The functions of the processing device may be partially or completely implemented by software.

[0364] Optionally, the processing device may include a memory and a processor, wherein the memory is used to store a computer program, and the processor reads and executes the computer program stored in the memory to perform corresponding processing and / or steps in any one of the method embodiments.

[0365] Alternatively, the processing device may include only a processor. A memory for storing a computer program is located outside the processing device, and the processor is connected to the memory via a circuit / wire to read and execute the computer program stored in the memory. The memory and the processor may be integrated together, or may be physically independent of each other.

[0366] Optionally, the processing device may be one or more chips, or one or more integrated circuits. For example, the processing device may be one or more field-programmable gate arrays (FPGA), application specific integrated circuits (ASIC), system on chip (SoC), central processor unit (CPU), network processor (NP), digital signal processor (DSP), microcontroller unit (MCU), programmable logic device (PLD) or other integrated chips, or any combination of the above chips or processors.

[0367] See also Fig.15 , is a communication device 1500 involved in the above-mentioned embodiments provided in an embodiment of the present application, and the communication device 1500 can specifically be a communication device serving as a terminal device in the above-mentioned embodiments.

[0368] Herein, a possible logical structure diagram of the communication device 1500 is shown. The communication device 1500 may include but is not limited to at least one processor 1501 and a communication port 1502 .

[0369] in, Fig.13 The transceiver unit 1301 shown may be a communication interface, which may be Fig.15 The communication port 1502 in the embodiment may include an input interface and an output interface. Alternatively, the communication port 1502 may also be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0370] Understandably, Fig.15 The communication port 1502 in the communication module may send the SRS signal by beam switching and / or antenna switching.

[0371] Further optionally, the device may also include at least one of a memory 1503 and a bus. In an embodiment of the present application, the at least one processor 1501 is used to control and process the actions of the communication device 1500.

[0372] In addition, the processor 1501 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It can implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. The processor can also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0373] It should be noted that Fig.15 The communication device 1500 shown can be specifically used to implement the steps implemented by the terminal device in the aforementioned method embodiment, and achieve the corresponding technical effects of the terminal device. Fig.15 The specific implementation methods of the communication device shown can all refer to the description in the aforementioned method embodiment, and will not be described in detail here.

[0374] See also Fig.16 , is a schematic diagram of the structure of the communication device 1600 involved in the above embodiment provided in the embodiment of the present application. The communication device 1600 may specifically be the communication device as the network device in the above embodiment. The structure of the communication device may refer to Fig.16 The structure shown.

[0375] The communication device 1600 includes at least one processor 1611 and at least one network interface 1614. Further optionally, the communication device also includes at least one memory 1612, at least one transceiver 1613 and one or more antennas 1615. The processor 1611, the memory 1612, the transceiver 1613 and the network interface 1614 are connected, for example, through a bus. In an embodiment of the present application, the connection may include various interfaces, transmission lines or buses, etc., which are not limited in this embodiment. The antenna 1615 is connected to the transceiver 1613. The network interface 1614 is used to enable the communication device to communicate with other communication devices through a communication link. For example, the network interface 1614 may include a network interface between the communication device and the core network device, such as an S1 interface, and the network interface may include a network interface between the communication device and other communication devices (such as other network devices or core network devices), such as an X2 or Xn interface.

[0376] in, Fig.13 The transceiver unit 1301 shown may be a communication interface, which may be Fig.16The network interface 1614 in the embodiment may include an input interface and an output interface. Alternatively, the network interface 1614 may also be a transceiver circuit, which may include an input interface circuit and an output interface circuit.

[0377] The processor 1611 is mainly used to process the communication protocol and communication data, and to control the entire communication device, execute the software program, and process the data of the software program, for example, to support the communication device to perform the actions described in the embodiment. The communication device may include a baseband processor and a central processing unit. The baseband processor is mainly used to process the communication protocol and communication data, and the central processing unit is mainly used to control the entire communication device, execute the software program, and process the data of the software program. Fig.16 The processor 1611 in the embodiment can integrate the functions of the baseband processor and the central processor. It can be understood by those skilled in the art that the baseband processor and the central processor can also be independent processors, which are interconnected through technologies such as buses. It can be understood by those skilled in the art that the communication device can include multiple baseband processors to adapt to different network formats, and the communication device can include multiple central processors to enhance its processing capabilities. The various components of the communication device can be connected through various buses. The baseband processor can also be described as a baseband processing circuit or a baseband processing chip. The central processor can also be described as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data can be built into the processor, or it can be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.

[0378] The memory is mainly used to store software programs and data. The memory 1612 can be independent and connected to the processor 1611. Optionally, the memory 1612 can be integrated with the processor 1611, for example, integrated into a chip. Among them, the memory 1612 can store program codes for executing the technical solutions of the embodiments of the present application, and the execution is controlled by the processor 1611. The various types of computer program codes executed can also be regarded as drivers of the processor 1611.

[0379] Fig.16 Only one memory and one processor are shown. In an actual communication device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be a storage element on the same chip as the processor, i.e., an on-chip storage element, or an independent storage element, which is not limited in the embodiments of the present application.

[0380] The transceiver 1613 can be used to support the reception or transmission of radio frequency signals between the communication device and the terminal, and the transceiver 1613 can be connected to the antenna 1615. The transceiver 1613 includes a transmitter Tx and a receiver Rx. Specifically, one or more antennas 1615 can receive radio frequency signals, and the receiver Rx of the transceiver 1613 is used to receive the radio frequency signal from the antenna, convert the radio frequency signal into a digital baseband signal or a digital intermediate frequency signal, and provide the digital baseband signal or the digital intermediate frequency signal to the processor 1611, so that the processor 1611 further processes the digital baseband signal or the digital intermediate frequency signal, such as demodulation and decoding. In addition, the transmitter Tx in the transceiver 1613 is also used to receive a modulated digital baseband signal or a digital intermediate frequency signal from the processor 1611, and convert the modulated digital baseband signal or the digital intermediate frequency signal into a radio frequency signal, and send the radio frequency signal through one or more antennas 1615. Specifically, the receiver Rx can selectively perform one or more stages of down-mixing and analog-to-digital conversion processing on the RF signal to obtain a digital baseband signal or a digital intermediate frequency signal, and the order of the down-mixing and analog-to-digital conversion processing is adjustable. The transmitter Tx can selectively perform one or more stages of up-mixing and digital-to-analog conversion processing on the modulated digital baseband signal or digital intermediate frequency signal to obtain a RF signal, and the order of the up-mixing and digital-to-analog conversion processing is adjustable. The digital baseband signal and the digital intermediate frequency signal can be collectively referred to as a digital signal.

[0381] The transceiver 1613 may also be referred to as a transceiver unit, a transceiver, a transceiver device, etc. Optionally, a device in the transceiver unit for implementing a receiving function may be regarded as a receiving unit, and a device in the transceiver unit for implementing a sending function may be regarded as a sending unit, that is, the transceiver unit includes a receiving unit and a sending unit, and the receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0382] It should be noted that Fig.16 The communication device 1600 shown can be specifically used to implement the steps implemented by the network device in the aforementioned method embodiment, and achieve the corresponding technical effects of the network device. Fig.16 The specific implementation methods of the communication device 1600 shown can all refer to the description in the aforementioned method embodiment, and will not be repeated here.

[0383] An embodiment of the present application also provides a computer-readable storage medium, which is used to store one or more computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method described in the possible implementation methods of the terminal device or network device in the above embodiments.

[0384] An embodiment of the present application also provides a computer program product (or computer program). When the computer program product is executed by the processor, the processor executes the method of the possible implementation mode of the above-mentioned terminal device or network device.

[0385] The embodiment of the present application also provides a chip system, which includes at least one processor for supporting a communication device to implement the functions involved in the possible implementation methods of the above-mentioned communication device. Optionally, the chip system also includes an interface circuit, which provides program instructions and / or data for the at least one processor. In one possible design, the chip system may also include a memory, which is used to store the necessary program instructions and data for the communication device. The chip system can be composed of chips, or it can include chips and other discrete devices, wherein the communication device can specifically be a terminal device or a network device in the aforementioned method embodiment.

[0386] An embodiment of the present application also provides a communication system, which includes the terminal device and the network device in any of the above embodiments.

[0387] In the several embodiments provided in the present 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as 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 mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0388] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0389] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0390] When the above-mentioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above-mentioned method embodiment. The terminal chip receives information from the base station, which can be understood as the information is first received by other modules in the terminal (such as a radio frequency module or an antenna), and then sent to the terminal chip by these modules. The terminal chip sends information to the base station, which can be understood as the information is first sent to other modules in the terminal (such as a radio frequency module or an antenna), and then sent to the base station by these modules.

[0391] When the above-mentioned communication device is a chip applied to a base station, the base station chip implements the function of the base station in the above-mentioned method embodiment. The base station chip receives information from the terminal, which can be understood as the information is first received by other modules in the base station (such as a radio frequency module or an antenna), and then sent to the base station chip by these modules. The base station chip sends information to the terminal, which can be understood as the information is sent to other modules in the base station (such as a radio frequency module or an antenna), and then sent to the terminal by these modules.

[0392] It is understandable that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0393] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. The processor and the storage medium can also be present in a base station or a terminal as discrete components.

[0394] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it 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 programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instruction may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server, data center, etc. that integrates one or more available media. The available medium may be a magnetic medium, for example, a floppy disk, a hard disk, a tape; it may also be an optical medium, for example, a digital video disc; it may also be a semiconductor medium, for example, a solid-state hard disk. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0395] In the various embodiments of the present application, unless otherwise specified or provided for in any logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0396] It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

Claims

1. A method for sending a sounding reference signal (SRS), characterized in that: The method is applied to a terminal device, and the method comprises: Receive first configuration information from a network device, where the first configuration information indicates a first SRS resource and a second SRS resource; the first configuration information is used for downlink channel state information measurement or for instructing the terminal device to send an SRS by antenna switching; A first SRS and a second SRS are sent to the network device, the first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, and a transmission beam of the first SRS resource is different from a transmission beam of the second SRS resource.

2. The method according to claim 1, characterized in that: The first SRS resource includes a first SRS port and a second SRS port, and the second SRS resource includes a third SRS port and a fourth SRS port.

3. The method according to claim 1 or 2, characterized in that: The first SRS resource and the second SRS resource further satisfy at least one of the following: The first SRS resource and the second SRS resource are associated with the same transmitting antenna; or The first SRS resource and the second SRS resource are associated with different transmission beams; or The transmitting antenna associated with at least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource is the same; or At least one SRS port of the first SRS resource and at least one SRS port of the second SRS resource are associated with different transmission beams.

4. The method according to any one of claims 1 to 3, characterized in that The first configuration information further includes a third SRS resource, and the third SRS resource is associated with a different transmitting antenna than the first SRS resource and the second SRS resource.

5. The method according to claim 4, characterized in that Protection symbols are configured between different SRS resources and at least one of the following conditions is met: The first SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; or The second SRS resource and the third SRS resource are separated by at least the Y symbols in the time domain; Wherein, Y is an integer greater than or equal to 1.

6. The method according to claim 5, characterized in that The value of Y is related to the subcarrier spacing.

7. The method according to any one of claims 1 to 6, characterized in that Before receiving the first configuration information from the network device, the method further includes: Send capability information related to the antenna port of the terminal device.

8. The method according to claim 7, characterized in that The capability information includes at least one of the following: The beamforming mode of the receiving antenna port of the terminal device is different from the beamforming mode of the transmitting antenna port; or The number of transmitting antennas associated with an uplink pilot port of the terminal device is not equal to the number of receiving antennas associated with a downlink pilot port; or The number of antenna ports for downlink reception of the terminal device is different from the number of antenna ports for uplink transmission; or The number of physical antennas associated with each receiving radio frequency chain and each transmitting radio frequency chain of the terminal device is different; or The downlink receiving antenna structure and the uplink transmitting antenna structure of the terminal device are different.

9. The method according to claim 8, characterized in that The beamforming method includes one or more of the following: digital domain beamforming, analog domain beamforming, and hybrid beamforming.

10. The method according to any one of claims 7 to 9, characterized in that The number of guard symbols of the first SRS resource and the second SRS resource is less than Y symbols.

11. The method according to claim 10, characterized in that The terminal device receives or sends a signal within the protection symbol.

12. A resource configuration method, characterized in that: The method is applied to a network device, and the method comprises: Sending first configuration information to a terminal device, where the first configuration information indicates a first SRS resource and a second SRS resource, and the first configuration information is used for downlink channel state information measurement or for instructing the terminal device to send an SRS by antenna switching; A first SRS and a second SRS are received from the terminal device, wherein the first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, and a transmission beam of the first SRS resource is different from a transmission beam of the second SRS resource.

13. The method according to claim 12, characterized in that The method further comprises: Capability information is received from the terminal device, where the capability information is related to an antenna port of the terminal device.

14. The method according to claim 13, characterized in that The capability information includes at least one of the following: The beamforming mode of the receiving antenna port of the terminal device is different from the beamforming mode of the transmitting antenna port; or The number of transmitting antennas associated with an uplink pilot port of the terminal device is not equal to the number of receiving antennas associated with a downlink pilot port; or The number of antenna ports for downlink reception of the terminal device is different from the number of antenna ports for uplink transmission; or The number of physical antennas associated with each receiving radio frequency chain and each transmitting radio frequency chain of the terminal device is different; or The downlink receiving antenna structure and the uplink transmitting antenna structure of the terminal device are different.

15. The method according to claim 14, characterized in that The beamforming method includes one or more of the following: digital domain beamforming, analog domain beamforming, and hybrid beamforming.

16. The method according to any one of claims 13 to 15, characterized in that The method further comprises: Based on the capability information, pilot resources for beam management and / or quasi-co-location type QCL-type D reference signals are configured to the terminal device.

17. The method according to claim 16, characterized in that The configuring, to the terminal device based on the capability information, a pilot resource or a quasi co-location type QCL-typeD reference signal for beam management, comprises: When the beamforming mode of the transmitting antenna port of the terminal device is hybrid beamforming, and when the beamforming mode of the receiving antenna port of the terminal device is digital domain beamforming, the pilot resources for beam management and / or the QCL-typeD reference signal are configured for uplink transmission, and the pilot resources for beam management and / or the QCL-typeD reference signal are not configured for downlink transmission.

18. The method according to any one of claims 12 to 17, characterized in that The number of guard symbols of the first SRS resource and the second SRS resource is less than Y symbols.

19. The method according to claim 18, characterized in that The protection symbol is used by the terminal device to receive or send a signal.

20. A communication device, characterized in that: The communication device comprises: A transceiver unit, configured to receive first configuration information from a network device, wherein the first configuration information indicates a first SRS resource and a second SRS resource; the first configuration information is used for downlink channel state information measurement or for instructing the terminal device to send an SRS by antenna switching; A processing unit, configured to generate a first SRS and a second SRS; The transceiver unit is further used to send the first SRS and the second SRS to the network device, the first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, and the transmission beam of the first SRS resource is different from the transmission beam of the second SRS resource.

21. The device according to claim 20, characterized in that The first SRS resource includes a first SRS port and a second SRS port, and the second SRS resource includes a third SRS port and a fourth SRS port.

22. The device according to claim 20 or 21, characterized in that The first SRS resource and the second SRS resource further satisfy at least one of the following: The first SRS resource and the second SRS resource are associated with the same transmitting antenna; or The first SRS resource and the second SRS resource are associated with different transmission beams; or The at least one antenna port of the first SRS resource is associated with the same transmitting antenna as the at least one antenna port of the second SRS resource; or The transmission beam associated with at least one antenna port of the first SRS resource and at least one antenna port of the second SRS resource is different.

23. The device according to any one of claims 20 to 22, characterized in that The first configuration information further includes a third SRS resource, and the third SRS resource is associated with a different transmitting antenna than the first SRS resource and the second SRS resource.

24. The device according to claim 23, characterized in that Protection symbols are configured between different SRS resources and at least one of the following conditions is met: The first SRS resource and the third SRS resource are separated by at least Y symbols in the time domain; or The second SRS resource and the third SRS resource are separated by at least the Y symbols in the time domain; Wherein, Y is an integer greater than or equal to 1.

25. The device according to claim 24, characterized in that The value of Y is related to the subcarrier spacing.

26. The device according to any one of claims 20 to 25, characterized in that The transceiver unit is also used to send capability information related to the antenna port of the communication device.

27. The device according to claim 26, characterized in that The capability information includes at least one of the following: The beamforming mode of the receiving antenna port of the communication device is different from the beamforming mode of the transmitting antenna port; or The number of transmitting antennas associated with an uplink pilot port of the communication device is not equal to the number of receiving antennas associated with a downlink pilot port; or The downlink transmission capability and uplink reception capability of the communication device are different; or The number of antenna ports for downlink reception of the communication device is different from the number of antenna ports for uplink transmission; or The number of physical antennas associated with each receiving radio frequency chain and each transmitting radio frequency chain of the communication device is different; or The downlink receiving antenna structure of the communication device is different from the uplink transmitting antenna structure.

28. The device according to claim 27, characterized in that The beamforming method includes one or more of the following: digital domain beamforming, analog domain beamforming, and hybrid beamforming.

29. The device according to any one of claims 26 to 28, characterized in that The number of guard symbols of the first SRS resource and the second SRS resource is less than Y symbols.

30. The device according to claim 29, characterized in that The transceiver unit is further configured to receive or send a signal within the protection symbol.

31. A communication device, characterized in that: The communication device comprises: A processing unit, configured to determine first configuration information, where the first configuration information indicates a first SRS resource and a second SRS resource, and the first configuration information is used for downlink channel state information measurement or for instructing the terminal device to send an SRS by antenna switching; A transceiver unit, configured to send the first configuration information to a terminal device; The transceiver unit is also used to receive a first SRS and a second SRS from the terminal device, the first SRS resource is used to carry the first SRS, the second SRS resource is used to carry the second SRS, and a transmission beam of the first SRS resource is different from a transmission beam of the second SRS resource.

32. The communication device according to claim 31, characterized in that The transceiver unit is further used to receive capability information from the terminal device, where the capability information is related to an antenna port of the terminal device.

33. The communication device according to claim 32, characterized in that: The capability information includes at least one of the following: The beamforming mode of the receiving antenna port of the terminal device is different from the beamforming mode of the transmitting antenna port; or The number of transmitting antennas associated with an uplink pilot port of the terminal device is not equal to the number of receiving antennas associated with a downlink pilot port; or The number of antenna ports for downlink reception of the terminal device is different from the number of antenna ports for uplink transmission; or The number of physical antennas associated with each receiving radio frequency chain and each transmitting radio frequency chain of the terminal device is different; or The downlink receiving antenna structure and the uplink transmitting antenna structure of the terminal device are different.

34. The communication device according to claim 33, characterized in that The beamforming method includes one or more of the following: digital domain beamforming, analog domain beamforming, and hybrid beamforming.

35. The communication device according to any one of claims 32 to 34, characterized in that: The processing unit is further configured to determine a pilot resource and / or a quasi co-location type QCL-typeD reference signal for beam management based on the capability information; The transceiver unit is also used to configure the pilot resources used for beam management and / or quasi-co-location type QCL-type D reference signal to the terminal device.

36. The communication device according to claim 35, characterized in that The transceiver unit is also used to configure the pilot resources for beam management and / or the QCL-typeD reference signal for uplink transmission when the beamforming mode of the transmitting antenna port of the terminal device is hybrid beamforming and the beamforming mode of the receiving antenna port of the terminal device is digital domain beamforming, and not configure the pilot resources for beam management and / or the QCL-typeD reference signal for downlink transmission.

37. The communication device according to any one of claims 31 to 36, characterized in that: The number of guard symbols of the first SRS resource and the second SRS resource is less than Y symbols.

38. The communication device according to claim 37, characterized in that: The protection symbol is used by the terminal device to receive or send a signal.

39. A communication device, characterized in that: The method comprises at least one processor coupled to a memory; the at least one processor is configured to execute the method according to any one of claims 1 to 11.

40. The communication device according to claim 39, characterized in that The communication device is a chip.

41. A communication device, characterized in that: The method comprises at least one processor coupled to a memory; the at least one processor is configured to execute the method according to any one of claims 12 to 19.

42. The communication device according to claim 40, characterized in that The communication device is a chip.

43. A communication system, characterized in that: Comprises the communication device as claimed in claim 40 and the communication device as claimed in claim 41.

44. A readable storage medium, characterized in that The storage medium stores a computer program or an instruction, and when the computer program or the instruction is executed by the communication device, the method according to any one of claims 1 to 19 is implemented.

45. A computer program product, characterized in that The method comprises instructions which, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 19.

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