CN110830202B - Communication method, device and communication system - Google Patents

Abstract

The present application provides a communication method, apparatus and communication system. The method includes: a terminal device adopts a first antenna weight vector to receive a target downlink reference signal sent by a network device; the terminal device adopts a second antenna weight vector set Sending a target uplink reference signal to the network device, wherein the second antenna weight vector set and the first antenna weight vector have the same ratio of weight amplitudes corresponding to the same antenna, and/or the second antenna weight vector set has the same ratio The antenna weight vector set has the same phase as the weight corresponding to the same antenna in the first antenna weight vector. It is beneficial to improve the accuracy of time synchronization or calculation of air interface loopback delay.

Description

Communication method, device and communication system

technical field

The present application relates to the field of communication, and more particularly, to a communication method, apparatus and communication system.

Background technique

Wireless communication technology has penetrated into many traditional industries, and has derived many emerging application scenarios. In order to meet the needs of different application scenarios, higher requirements are placed on the current communication system. For example, in industrial application scenarios, high precision is required for time synchronization (clock synchronization or timesynchronization) between devices. Some special industrial applications require the time synchronization accuracy between terminal devices to be within the range of ±1us. For another example, higher detection accuracy is required in the process of detecting the air interface loopback delay.

At present, in a communication system, whether to perform time synchronization or to detect air interface loopback delay, it is realized by transmitting uplink reference signals and downlink reference signals between terminal equipment and network equipment. Specifically, the clock correction is performed according to the arrival time of the uplink reference signal, the transmission time of the uplink reference signal, the arrival time of the downlink reference signal, and the transmission time of the downlink reference signal, or the air interface loopback delay is calculated.

However, when the receiving end detects the arrival time of the reference signal (that is, the network device detects the arrival time of the uplink reference signal, and the terminal device detects the arrival time of the downlink reference signal), the detection result will be affected by the transmit and receive beams that transmit the reference signal. Since the spatial energy distribution of different beams is different, the signal energy of the reference signal is concentrated on several propagation paths of the wireless channel. When the receiving end receives and detects the wireless signal, it is easier to detect the signal on the propagation path with strong energy and ignore the signal on the propagation path with weak energy. However, the transmission time required to transmit the reference signal on different paths In the end, when the network device and the terminal device detect the arrival time of the reference signal, due to the different transmission times of the uplink reference signal and the downlink reference signal, additional detection errors will be introduced and the accuracy of the detection result will be reduced.

Therefore, there is an urgent need for a method for transmitting a reference signal, which is beneficial to improve the accuracy of time synchronization or calculation of air interface loopback delay.

SUMMARY OF THE INVENTION

The present application provides a communication method and device, which are beneficial to improve the accuracy of time synchronization or calculation of air interface loopback delay.

A first aspect provides a communication method, including: a terminal device uses a first antenna weight vector to receive a target downlink reference signal sent by a network device, where the target downlink reference signal is the network device using a third antenna weight vector The terminal device uses the second antenna weight vector set to send the target uplink reference signal to the network device, and the target uplink reference signal is received by the network device using the fourth antenna weight vector; wherein, the The second antenna weight vector set and the first antenna weight vector have the same ratio of weight amplitudes corresponding to the same antenna, and/or the second antenna weight vector set is the same as the first antenna weight vector The weights corresponding to the same antenna have the same phase.

In the application of the embodiments of the present application, the spatial energy distribution of the transmission of the target downlink reference signal is configured to be the same as the spatial energy distribution of the reception of the target uplink reference signal; and/or the spatial energy distribution of the transmission of the target uplink reference signal is configured The energy distribution is the same as the received spatial energy distribution of the target downlink reference signal, or configured to be the same after mathematical transformation. The transmission antenna weight or the reception antenna weight vector of the terminal device and the network device determines the spatial energy distribution of the target downlink reference signal and the target uplink reference signal. The antenna weight vector can also be understood as a spatial filter, or an antenna array gain.

In the embodiment of the present application, the communication system may limit the antenna weight of the transmitting antenna of the terminal device to send the target uplink reference signal according to the antenna weight of the receiving antenna of the target downlink reference signal, or according to the target uplink reference signal The antenna weight of the transmitting antenna defines the antenna weight of the receiving antenna of the terminal device for receiving the target downlink reference signal, so as to reduce the measurement error.

It should be understood that the antenna weight vector and the antenna weight vector set may be the weighted value or the scaling value of the signal transmission or reception of each transmitting or receiving antenna of the network device or the terminal device; it may also be the target The power adjustment or power allocation of the reference signal and/or the phase adjustment of the reference signal in the process of generating the uplink reference signal or the target downlink reference signal. The receiving and transmitting antenna weight vectors with the same proportion can ensure that the network device or the terminal device obtains the same antenna array gain or spatial energy distribution during the transmission and/or reception of the target downlink reference signal and the target uplink reference signal, Thereby, the detection difference of the uplink and downlink reference signals is reduced.

In a possible implementation manner, the ratio of the antenna weight vector of the receiving antenna of the target uplink reference signal and the antenna weight vector of the transmitting antenna of the target downlink reference signal corresponding to the antenna weight of the same antenna is the same, That is, the ratio of the antenna weights corresponding to the same antenna in the fourth antenna weight vector and the third antenna weight vector is the same.

In the embodiment of the present application, the ratio of the antenna weights corresponding to the same antenna in the fourth antenna weight vector and the third antenna weight vector is the same, and the second antenna weight vector set corresponds to the same antenna weight vector as the first antenna weight vector When the ratios of the weight amplitudes of the antennas are the same, and the weights of the second antenna weight vector set and the first antenna weight vector corresponding to the same antenna have the same phase or the same phase difference between the antennas, the target uplink reference signal and the target downlink The spatial energy distribution of the beams used by the reference signal is the same, and the transmission time occupied by the transmission in the path is similar, which is beneficial to improve the accuracy of time synchronization or detection of loopback delay. In the prior art, it is avoided that the accuracy of time synchronization or loopback delay detection is low due to different transmission beams of the uplink reference signal and the downlink reference signal.

In a possible implementation manner, the method further includes: the terminal device according to the first antenna weight vector, the correspondence between the receiving antenna of the target downlink reference signal and the transmitting antenna of the target uplink reference signal relationship, the second antenna weight vector set is determined.

In the embodiment of the present application, the second antenna weight vector set is determined according to the first antenna weight vector, so as to realize the spatial energy distribution of the transmitting antenna of the target uplink reference signal and the spatial energy of the receiving antenna of the target downlink reference signal The distribution is the same, which is beneficial to improve the accuracy of time synchronization or detection of loopback delay.

It should be understood that since the transmitting antenna capability of the uplink signal of the terminal device may be weaker than the receiving antenna capability of the downlink signal, that is, the number of transmitting antennas is less than the number of receiving antennas, the second antenna weight vector set used by the target uplink reference signal Equivalent spatial energy distribution of the transmitting antenna is achieved in cooperation with the weighting operation of the network device.

In a possible implementation manner, the terminal device determines the second antenna weight vector set according to the first antenna weight vector, the corresponding relationship between the receiving antenna of the target downlink reference signal and the transmitting antenna of the target uplink reference signal , including: the terminal device determines, according to the first antenna weight vector, the antenna weight of each receiving antenna in the receiving antennas of the target downlink reference signal; The antenna weight of each receiving antenna in the antennas, and the corresponding relationship between the transmitting antenna of the target uplink reference signal and the receiving antenna of the target downlink reference signal, determine the second antenna weight vector set.

In the embodiment of the present application, according to the antenna weight vector (ie the first antenna weight vector) of the receiving antenna of the target downlink reference signal, the antenna weight vector (ie the second antenna weight vector) of the transmitting antenna of the target uplink reference signal is configured vector), the traditional method for receiving the target downlink reference signal by the terminal equipment can be reused, and only the method for the terminal equipment to send the target uplink reference signal is improved.

In a possible implementation manner, the terminal device sending the target uplink reference signal to the network device according to the second antenna weight vector set includes: the terminal device occupying at least one antenna weight vector set according to the second antenna weight vector set Uplink transmission resource, sending the target uplink reference signal to the network device, the transmission antenna sets of the target uplink reference signal corresponding to different antenna weight vectors in the second antenna weight vector set are different, and the at least The transmission antenna sets of the target uplink reference signal corresponding to different uplink transmission resources in one uplink transmission resource are different.

It should be understood that when the number of transmitting antennas of the terminal device is less than the number of receiving antennas, the target uplink reference signal sent by the terminal device needs to occupy multiple uplink transmission resources. Each of the uplink transmission resources includes at least three resources of time domain resources, frequency domain resources and code domain resources of the uplink reference signal to distinguish different uplink transmission resources, and at least one of the above three resources is among the uplink transmission resources. are different from each other.

In the embodiment of the present application, the target uplink reference signal is sent to the network device by using different sets of transmitting antennas, that is, the target uplink reference signal is sent by means of antenna switching, so that the terminal device sends the antenna set of the uplink reference signal and receives the downlink reference signal. The antenna sets are the same to achieve the equivalent spatial energy distribution of the uplink reference signal.

It should be understood that the multiple uplink transmission resources use different uplink antenna sets to send the target uplink reference signal; each uplink antenna set corresponds to a weight vector in the second antenna weight vector set; that is, the uplink transmission resources, the uplink antenna set , the weight vectors of the second antenna weight vector set are in one-to-one correspondence. The corresponding relationship between the uplink transmission resources and the uplink antenna set is defined in the protocol, and is configured by the network device for the terminal device; the corresponding relationship between the weight vector of the second antenna weight vector set and the first two is generated in the first The weight vector of the two-antenna weight vector set is determined.

In a possible implementation manner, the second antenna weight vector set is the same as the weight amplitude ratio of the first antenna weight vector corresponding to the same antenna, and the method further includes: sending the terminal device to the The network device sends first information, where the first information includes phase information of the first antenna weight vector.

In the embodiment of the present application, the terminal device sends the first information to the network device, so that the network device determines the weighting parameters of the multiple uplink transmission resources of the target uplink reference signal according to the first information, so as to reduce the generation of the target uplink reference by the terminal device. complexity of the signal.

It should be understood that the magnitude or power ratio of the second antenna weight vector set and the weight corresponding to the same antenna in the first antenna weight vector are the same, but the phases of the two weights are not limited. The magnitude of the weight or the power change ratio is affected by the power normalization operation of the terminal device and the limit of the transmit power.

In a possible implementation manner, the second antenna weight vector set is the same as the phase corresponding to the same antenna in the first antenna weight vector, and the method further includes: the terminal device sends a message to the network device Second information is sent, where the second information includes magnitude information of the first antenna weight vector.

In this embodiment of the present application, the terminal device sends the second information to the network device, so that the network device determines the weighting parameters of the multiple uplink transmission resources of the target uplink reference signal according to the second information, so as to reduce the generation of the target uplink reference by the terminal device. complexity of the signal.

It should be understood that the second antenna weight vector set and the first antenna weight vector corresponding to the same antenna have the same phase or the same phase difference between antennas. The power of the second antenna weight vector is determined by the transmit power limit of the terminal device.

In a possible implementation manner, the terminal device determines, according to the second antenna weight vector used by the target uplink reference signal and the transmitting antenna of the target uplink reference signal, the antenna used by the target downlink reference signal. The first antenna weight vector and the receiving antenna of the target downlink reference signal.

It should be understood that the second antenna weight vector set includes one second antenna weight vector.

In a possible implementation manner, the method further includes: receiving, by the terminal device, third information from the network device, where the third information is used to indicate the resource number of the target uplink reference signal and the Target downlink reference signal resource number.

In this embodiment of the present application, the network device indicates to the terminal device the resource number of the target uplink reference signal and the resource number of the target downlink reference signal, so as to notify the terminal device of a set of reference signals to be used for time synchronization or delay in loopback detection. .

It should be understood that the third information may be carried in at least one of the following signaling: downlink control information DCI, radio resource control RRC, and medium intervention control layer control element MAC CE.

In a possible implementation manner, the method further includes: the terminal device determines the receiving antenna of the target downlink reference signal according to the transmitting antenna of the target uplink reference signal, or the terminal device determines the receiving antenna of the target downlink reference signal according to the first For the transmitting antennas corresponding to the two antenna weight vectors, the receiving antenna corresponding to the first antenna weight vector is determined.

In a possible implementation manner, the method further includes: determining, by the terminal device, the first antenna weight vector according to the second antenna weight vector, and the second antenna weight vector is related to the first antenna weight vector. The weights corresponding to the same antenna in an antenna weight vector are the same.

In the embodiment of the present application, the antenna weight vector of the receiving antenna of the target downlink reference signal is determined according to the antenna weight vector of the transmitting antenna of the target uplink reference signal, so as to ensure the arrival time of the detected downlink target reference signal and the detection target uplink reference signal. The symmetry of the original protocol makes up for the difference in the number of receiving antennas and transmitting antennas of the terminal equipment in the original protocol, and it is impossible to configure the spatial distribution of the beam for transmitting the target uplink reference signal and the spatial distribution of the beam for transmitting the target downlink reference signal. Shortcomings, and, for Existing communication protocols have minor changes.

In a possible implementation manner, the terminal device uses the first antenna weight vector to receive the target downlink reference signal sent by the network device, and further includes: the terminal device uses the first antenna weight vector to receive the network the first channel sent by the device, where the first channel carries the first data signal and the target downlink reference signal; the terminal device uses the second antenna weight vector set to send the target uplink reference signal to the network device, The method includes: the terminal device uses the second antenna weight vector to send a second channel to the network device, where the second channel carries the second data signal and the target uplink reference signal.

In this embodiment of the present application, by configuring the first antenna weight vector used when receiving the first channel and the second antenna weight vector used when sending the second channel, the target downlink reference carried in the first channel is indirectly configured to receive The antenna weight used for the signal and the antenna weight used for transmitting the target uplink reference signal carried in the second channel are beneficial to improve the accuracy of time synchronization or loopback delay detection.

In a second aspect, a communication method is provided, including: a terminal device sending fourth information to a network device, where the fourth information is used to indicate amplitude information and phase information of a first antenna weight vector; the terminal device adopts the The first antenna weight vector receives the target downlink reference signal sent by the network device.

In the process of transmitting the reference signal in the embodiment of the present application, the transmission beam of the terminal device to send the uplink reference signal is not limited, and the network device obtains the equivalent uplink beam through mathematical transformation, such as weighted combination, to ensure the space energy of the equivalent uplink beam. The distribution is the same as the spatial energy distribution of the first antenna weight vector, which is beneficial to reduce measurement errors.

It should be understood that the terminal device sends the fourth information to the network device, so that the network device determines the weighting parameters of the multiple uplink transmission resources of the target uplink reference signal according to the first antenna weight vector. The transmission weight of the target uplink reference signal is obtained according to the calculation method specified in the existing protocol, so that the generation method of the uplink reference signal is kept unchanged, and the transmission rule of the uplink reference signal of the terminal device is guaranteed to be unchanged.

In a possible implementation manner, the fourth antenna weight vector of the receiving antenna of the target uplink reference signal is determined according to the third antenna weight vector, and the third antenna weight vector and the fourth antenna weight vector are in the The antenna weights corresponding to the same antenna are the same, and the third antenna weight vector is the antenna weight vector of the transmitting antenna of the target downlink reference signal.

In a possible implementation manner, the sending, by the terminal device, the fourth information to the network device includes: the terminal device sending the fourth information to the network device, where the fourth information is carried in the following information: At least one kind of information: downlink control information DCI, radio resource control RRC and media intervention control layer control unit MAC CE.

It should be noted that, in the communication method introduced in the above second aspect, only the manner in which the terminal device receives the target downlink reference signal and the network device sends the uplink reference signal is described. The downlink reference signal is used in combination with the method for the network device to receive the target uplink reference signal. For example, the network device may determine a weighting parameter according to the first antenna weight vector obtained from the terminal device, and weight the target uplink reference signal according to the weighting parameter. For the sake of brevity, other combinations are not described in detail.

In a third aspect, a communication method is provided, comprising: a network device using a third antenna weight vector to send a target downlink reference signal to a terminal device, where the target downlink reference signal is received by the terminal device using the first antenna weight vector; The network device uses the fourth antenna weight vector to receive the target uplink reference signal sent by the terminal device, and the target uplink reference signal is sent by the terminal device using the second antenna weight vector, wherein the third antenna The weight vector is the same as the antenna weight ratio corresponding to the same antenna in the fourth antenna weight vector, and the second antenna weight vector set is the same as the weight amplitude of the first antenna weight vector corresponding to the same antenna. The proportions are the same, and/or the second antenna weight vector set and the weight phase corresponding to the same antenna in the first antenna weight vector are the same.

In the application of the embodiment of the present application, according to the relationship between the above-mentioned antenna weight vectors, the first antenna weight vector, the second antenna weight vector, the third antenna weight vector, and the fourth antenna weight vector are configured, which is beneficial to It is realized that the spatial energy distribution of the target downlink reference signal and the target uplink reference signal is the same for transmission and reception, so as to reduce the measurement error.

In this embodiment of the present application, the communication system may limit the antenna weight of the transmitting antenna of the target uplink reference signal sent by the network device according to the antenna weight of the transmitting antenna of the target downlink reference signal, or may limit the antenna weight of the receiving antenna of the target uplink reference signal according to the antenna weight of the receiving antenna of the target uplink reference signal. value, and determine the antenna weight of the transmitting antenna of the target downlink reference signal, so that the spatial energy distributions of the target uplink reference signal and the target downlink reference signal are the same for transmission and reception.

It should be understood that the antenna weight vector and the antenna weight vector set may be the weighted value or the scaling value of the signal transmission or reception of each transmitting or receiving antenna of the network device or the terminal device; it may also be the target The power adjustment of the reference signal and/or the phase adjustment of the reference signal in the process of generating the uplink reference signal or the target downlink reference signal. The same ratio of the receiving antenna weight vector and the transmitting antenna weight vector can ensure that the network device or the terminal device obtains the same antenna array gain in the process of transmitting and/or receiving the target downlink reference signal and the target uplink reference signal or Spatial energy distribution, thereby reducing the detection difference of uplink and downlink reference signals.

In a possible implementation manner, the ratio of the antenna weight vector of the transmitting antenna of the target uplink reference signal and the antenna weight vector of the receiving antenna of the target downlink reference signal corresponding to the antenna weight of the same antenna is the same, That is, the ratio of the antenna weights corresponding to the same physical antenna in the first antenna weight vector and the second antenna weight vector is the same.

In this embodiment of the present application, the ratio of the antenna weights corresponding to the same physical antenna in the fourth antenna weight vector and the third antenna weight vector is the same, and the second antenna weight vector set corresponds to the first antenna weight vector When the ratios of the weight amplitudes of the same antenna are the same, and the second antenna weight vector set and the weight vector corresponding to the same antenna in the first antenna weight vector have the same phase or the same phase difference between the antennas, the target uplink reference signal and the target The beams used by the downlink reference signal have the same spatial energy distribution, and the transmission time occupied in the path is similar, which is beneficial to improve the accuracy of time synchronization or detection of loopback delay. In the prior art, it is avoided that the accuracy of time synchronization or loopback delay detection is low due to different transmission times of the uplink reference signal and the downlink reference signal.

In a possible implementation manner, the network device determines the fourth antenna weight according to the third antenna weight vector, the corresponding relationship between the receiving antenna of the target uplink reference signal and the transmitting antenna of the target downlink reference signal vector, the ratio of the fourth antenna weight vector and the antenna weight corresponding to the same antenna in the third antenna weight vector is the same, wherein the third antenna weight vector is used to indicate the target downlink reference signal The antenna weight of the transmitting antenna, the fourth weight vector is used to indicate the antenna weight of the receiving antenna of the target uplink reference signal.

In the embodiment of the present application, the antenna weight vector of the receiving antenna of the target uplink reference signal is configured according to the antenna weight vector of the transmitting antenna of the target downlink reference signal, so that the antenna weight vector used by the network device to send the target downlink reference signal is the same as the The antenna weight vector used to receive the target uplink reference signal corresponds to the same antenna in the same proportion of the antenna weight.

In a possible implementation manner, the target uplink reference signal occupies at least one uplink transmission resource, and different uplink transmission resources in the at least one uplink transmission resource correspond to the sending antenna set and antenna weight of the target uplink reference signal. The value vector is different.

It should be understood that when the number of transmitting antennas of the terminal device is less than the number of receiving antennas, the target uplink reference signal sent by the terminal device needs to occupy multiple uplink transmission resources. Each of the uplink transmission resources includes at least three resources of time domain resources, frequency domain resources and code domain resources of the uplink reference signal to distinguish different uplink transmission resources, and at least one of the above three resources is among the uplink transmission resources. are different from each other.

In a possible implementation manner, the network device using the fourth antenna weight to receive the target uplink reference signal includes: the network device using the fourth antenna weight, in the at least one uplink receiving the target uplink reference signal on a transmission resource; the method further includes: combining, by the network device, signals of multiple uplink transmission resources of the target uplink reference signal, and detecting the arrival time of the target uplink reference signal .

In a possible implementation manner, the network device receives first information sent by a terminal device, where the first information includes phase information of a first antenna weight vector, and the first antenna weight vector indicates the target Antenna weight of the receiving antenna of the downlink reference signal.

In a possible implementation manner, combining the target uplink reference signals by the network device includes: determining, by the network device, a first weighting parameter according to the phase information, and applying the first weighting parameter to the target uplink reference signal. The target uplink reference signal is combined.

In the embodiment of the present application, the network device determines the first weighting parameter of the target uplink reference signal according to the phase information of the first antenna weight vector, and combines the target uplink reference signal according to the first weighting parameter, so that the terminal device can When generating the target uplink reference signal, the target uplink reference signal may be generated only according to the amplitude information of the first antenna weight vector, thereby reducing the complexity of generating the target uplink reference signal by the terminal device.

In a possible implementation manner, the method further includes: receiving, by the network device, second information sent by a terminal device, where the second information includes amplitude information of the first antenna weight vector, and the first The antenna weight vector indicates the antenna weight of the receiving antenna of the target downlink reference signal.

In a possible implementation manner, combining the target uplink reference signals by the network device includes: determining, by the network device, a second weighting parameter according to the amplitude information, and performing a combination of the two weighting parameters on the target uplink reference signal. The target uplink reference signal is combined.

In this embodiment of the present application, the network device determines the second weighting parameter of the target uplink reference signal according to the amplitude information of the first antenna weight vector, and combines the target uplink reference signal according to the second weighting parameter, so that the terminal device can When generating the target uplink reference signal, the target uplink reference signal may be generated only according to the phase information of the first antenna weight vector, thereby reducing the complexity of generating the target uplink reference signal by the terminal device.

In a possible implementation manner, the method further includes: receiving, by the network device, fourth information sent by the terminal device, where the fourth information includes a first antenna weight vector, the first antenna weight The vector indicates the antenna weight of the receiving antenna of the target downlink reference signal.

In a possible implementation manner, combining the target uplink reference signals by the network device includes: the network device determines a third weighting parameter according to the first antenna weight vector, and uses the third weighting parameter Combine the target uplink reference signals.

In the embodiment of the present application, the network device determines the third weighting parameter of the target uplink reference signal according to the first antenna weight vector, and combines the target uplink reference signal according to the third weighting parameter, so that the terminal device can generate the target uplink reference signal easily. When the reference signal is used, the target uplink reference signal can be generated only according to the phase information of the first antenna weight vector, so as to reduce the complexity of generating the target uplink reference signal by the terminal device.

In a possible implementation manner, before the network device uses the third antenna weight vector to send the target downlink reference signal to the terminal device, the method further includes: the network device determines, according to the target uplink reference signal, corresponding to the target uplink reference signal. the target downlink reference signal; or the network device determines the target uplink reference signal corresponding to the target downlink reference signal according to the target downlink reference signal.

In a possible implementation manner, the method further includes: the network device sending third information to the terminal device, where the third information is used to indicate the resource number of the target uplink reference signal and the target Downlink reference signal resource number.

In this embodiment of the present application, the network device indicates to the terminal device the resource number of the target uplink reference signal and the resource number of the target downlink reference signal, so as to notify the terminal device of a set of reference signals to be used for time synchronization or delay in loopback detection. .

In a possible implementation manner, the method further includes: the network device sending fifth information to the terminal device, where the fifth information is used to configure transmission resources of the target downlink reference signal.

In a possible implementation manner, the network device using the third antenna weight vector to send the target downlink reference signal to the terminal device includes: the network device using the third antenna weight vector to receive the terminal device The device sends a first channel, where the first channel carries the first data signal and the target downlink reference signal; the network device uses the fourth antenna weight vector to receive the target uplink reference signal sent by the terminal device , including: the network device uses the fourth antenna weight vector to receive the second channel sent by the terminal device, where the second channel carries the second data signal and the target uplink reference signal.

In this embodiment of the present application, by configuring the first antenna weight vector used when receiving the first channel and the second antenna weight vector used when sending the second channel, the target downlink reference carried in the first channel is indirectly configured to receive The antenna weight used for the signal and the antenna weight used for transmitting the target uplink reference signal carried in the second channel are beneficial to improve the accuracy of time synchronization or loopback delay detection.

In a fourth aspect, a communication apparatus is provided, and the communication apparatus includes various modules for implementing the functions of the terminal device in the methods of the above aspects.

In a fifth aspect, a communication apparatus is provided, and the communication apparatus includes various modules for implementing the functions of the network device in the methods of the above aspects.

In a sixth aspect, a terminal device is provided, including a transceiver, a processor and a memory. The processor is used to control the transceiver to send and receive signals, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the terminal device executes the methods in the above aspects.

In a seventh aspect, a network device is provided, including a transceiver, a processor, and a memory. The processor is used to control the transceiver to send and receive signals, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the network device executes the methods in the above aspects.

In an eighth aspect, a computer program product is provided, the computer program product comprising: computer program code, which, when the computer program code is run on a computer, causes the computer to execute the methods in the above aspects.

It should be noted that the above computer program code may be stored in whole or in part on the first storage medium, where the first storage medium may be packaged with the processor or separately packaged with the processor, which is not implemented in this embodiment of the present application. Specific restrictions.

In a ninth aspect, a computer-readable medium is provided, and the computer-readable medium stores program codes, which, when executed on a computer, cause the computer to execute the methods in the above-mentioned aspects.

A tenth aspect provides a chip system, the chip system includes a processor for a terminal device to implement the functions involved in the above aspects, for example, generating, receiving, sending, or processing the data involved in the above method and/or or information. In a possible design, the chip system further includes a memory for storing necessary program instructions and data of the terminal device. The chip system may be composed of chips, or may include chips and other discrete devices.

In an eleventh aspect, a chip system is provided, the chip system includes a processor for supporting a network device to implement the functions involved in the above aspects, for example, generating, receiving, sending, or processing data involved in the above methods and/or information. In a possible design, the chip system further includes a memory for storing necessary program instructions and data of the network device. The chip system may be composed of chips, or may include chips and other discrete devices.

Description of drawings

FIG. 1 is a wireless communication system 100 to which an embodiment of the present application is applied.

FIG. 2 is a schematic diagram of a communication method according to an embodiment of the present application.

FIG. 3 is a schematic diagram of a method for transmitting a downlink reference signal according to an embodiment of the present application.

FIG. 4 is a schematic diagram of a method for transmitting an uplink reference signal according to an embodiment of the present application.

FIG. 5 is a schematic diagram of a method for transmitting an uplink reference signal according to an embodiment of the present application.

FIG. 6 is a schematic diagram of a method for transmitting an uplink reference signal according to an embodiment of the present application.

FIG. 7 is a schematic diagram of a method for transmitting a downlink reference signal according to an embodiment of the present application.

FIG. 8 is a schematic block diagram of a communication apparatus according to an embodiment of the present application.

FIG. 9 is a schematic block diagram of a communication apparatus according to an embodiment of the present application.

FIG. 10 is a schematic block diagram of a communication apparatus according to an embodiment of the present application.

FIG. 11 is a schematic block diagram of a communication apparatus according to an embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a wireless communication system 100 to which an embodiment of the present application is applied. The wireless communication system 100 may include a network device 110 . The network device 110 may be a device that communicates with the terminal device 120 . The network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices located within the coverage area.

FIG. 1 exemplarily shows one network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. The application embodiments do not limit this.

Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.

It should be understood that the technical solutions of the present application can be applied to various communication systems, such as: global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) system, advanced long term evolution (advanced long term evolution, LTE-A) system, Universal mobile telecommunication system (UMTS), new radio access technology (NR), etc.

It should also be understood that, in this embodiment of the present application, the terminal device may include, but is not limited to, the terminal device applied in the Internet of Things, for example, it may be a terminal device that accesses NB-IoT (which may be referred to as "NB-IoT terminal" ): intelligent meter reading equipment, logistics tracking equipment, environmental monitoring equipment, etc.; the terminal may also include but not limited to mobile station (mobile station, MS), mobile terminal (mobile terminal), mobile telephone (mobile telephone), user equipment ( userequipment, UE), mobile phone (handset) and portable equipment (portable equipment), etc., the terminal equipment can communicate with one or more core networks via a radio access network (RAN), for example, the terminal equipment can be A mobile phone (or called a "cellular" phone), a computer with wireless communication function, etc., the terminal device can also be a portable, pocket-sized, hand-held, computer-built-in or vehicle-mounted mobile device.

In this embodiment of the present application, the network device may be an access network device, for example, a base station, a transmit and receive point (transmit and receive point, TRP) or an access point, and the base station may be a base station in GSM or CDMA (basetransceiver station, BTS), a base station (NodeB) in WCDMA, an evolved base station (evolved Node B, eNB or e-NodeB) in LTE, or a 5G NR base station (gNB), the embodiment of this application This is not specifically limited.

For ease of understanding, related concepts involved in the embodiments of the present application are briefly introduced first.

1. The transmitting antenna of the uplink reference signal and the receiving antenna of the downlink reference signal: The transmitting antenna of the uplink reference signal and the receiving antenna of the downlink reference signal are M physical antennas on the multiplexing terminal device.

Generally, if M physical antennas are set on the terminal device, the number of receiving antennas for downlink signals is M, and the number of transmitting antennas for uplink signals is P, where M and P are positive integers, and P is less than or equal to M. Generally, M can be a positive integer greater than or equal to 1, and P can be a positive integer greater than or equal to 1. For example, a terminal device with 1 transmit and 2 receive (1transmit 2 receive, 1T2R), a terminal device with 2 transmit and 2 receive (2T2R), and a terminal device with 2 transmit and 4 receive (2T4R).

2. The receiving antenna of the uplink signal and the transmitting antenna of the downlink signal: The transmitting antenna of the uplink signal and the receiving antenna of the downlink signal are N physical antennas set on the multiplexing network device, where N is a positive integer.

Generally, if N physical antennas are set on the network device, both the receiving antennas of the uplink reference signal and the transmitting antennas of the downlink reference signal are N, and usually N can be a positive integer greater than or equal to 1.

3. Antenna weight: used to indicate the parameters of the antenna, including the adjustment of the phase and amplitude of the signal sent or received on the antenna, where the amplitude can also be understood as power.

4. Antenna weight vector: also known as spatial filter (spatial filter), used to indicate the antenna weight of each physical antenna in the process of wireless transmission through multiple physical antennas.

The first antenna weight vector is used to indicate the antenna weight used by each receiving antenna to receive the downlink reference signal in the receiving antennas of the downlink reference signal. Generally, the first antenna weight vector can be represented by ω _DL,Rx , and is M× A vector of 1.

The second antenna weight vector is used to indicate the antenna weight used for transmitting the uplink reference signal of each transmit antenna in the transmit antennas of the uplink reference signal. Generally, the second antenna weight vector can be represented by ω _UL,Tx , and is P ×1 vector.

The third antenna weight vector is used to indicate the antenna weight used by each transmit antenna of the downlink reference signal transmitting antenna to transmit the downlink reference signal. Generally, the third antenna weight vector can be represented by ω _DL,Tx , and is N× A vector of 1.

The fourth antenna weight vector is used to indicate the antenna weight used by each receiving antenna for receiving the uplink reference signal in the receiving antennas of the uplink reference signal. Generally, the fourth antenna weight direction can be represented by ω _{UL, Rx} , and is N× A vector of 1.

5. Antenna weight vector set: including at least one antenna weight vector, used to indicate the antenna weight used by each antenna when transmitting reference signals through at least one antenna in each round in the process of transmitting reference signals in multiple rounds.

The second antenna weight vector set includes at least one second antenna weight vector, and each second antenna weight vector is used to indicate the antenna weight of the uplink reference signal sent by at least one transmitting antenna that transmits the uplink reference signal in each round.

It should be noted that the above-mentioned process of transmitting uplink reference signals in multiple rounds can be understood as: the transmitting antenna sets of uplink reference signals used in each round of transmitting uplink reference signals in multiple rounds are different, and the physical properties corresponding to different transmitting antenna sets are different. Antennas are different.

Sixth, the model of the wireless channel: describe the transmission process of the reference signal from the perspective of the data model.

The wireless channel model for transmitting downlink reference signals: y _DL =(ω _DL,Rx ) ^T H _DL ω _DL,Tx s _DL +n _DL , where _HDL represents the wireless channel for transmitting downlink reference signals, and _HDL is M×N , where s _DL represents the downlink reference signal, and n _DL represents the reference and noise.

Wireless channel model for transmitting uplink reference signals: y _UL =(ω _UL,Rx ) ^T H _UL ω _UL,Tx s _UL +n _UL , where H _UL represents the wireless channel for transmitting uplink reference signals, and H _UL is N×P , where s _UL represents the uplink reference signal, and n _UL represents the reference and noise.

It should be noted that the transmitting antenna set of the uplink reference signal is usually a subset of the receiving antenna set of the downlink reference signal. According to the reciprocity of the channel, the wireless channel matrix H _UL for transmitting the uplink reference signal is the wireless channel for transmitting the downlink reference signal. Submatrix of H _UL .

7. Time synchronization: The "time synchronization" in the embodiment of the present application is different from the "frame synchronization" based on the synchronization signal of wireless communication. Time synchronization means that the terminal device is synchronized with a specific time system, thereby ensuring that the devices in the entire system have the same time awareness, which is a widely recognized time system (currently commonly used time systems include UTC, GPS, etc.); "Frame synchronization" is to ensure that the terminal equipment within the coverage of a base station can correctly distinguish the boundary of the radio frame, and then ensure the correct analysis of the information in the frame, which is a private time system of a local cell. From this point of view, "time synchronization" is more stringent than "frame synchronization", and "time synchronization" can be implemented on the basis of "frame synchronization".

8. The arrival time and transmission time of the reference signal: Since the time synchronization can be realized on the basis of frame synchronization, the arrival time and transmission time of the reference signal can be synchronized with the frame, and the definition of the arrival time and transmission time of the reference signal same. For example, when the network device sends the reference signal according to the structure of the radio frame, the receiving end (for example, the network device or the terminal device) can use the frame boundary of the received radio frame as the arrival time of the reference signal, and the receiving end can also use the subframe of the received radio frame. The boundary is used as the arrival time of the reference signal, or the receiving end uses the symbol boundary where the radio frame is received as the arrival time of the reference signal, which is not specifically limited in this embodiment of the present application.

Three time synchronization scenarios to which the embodiments of the present application are applicable are respectively described below. It should be understood that the following three time synchronization scenarios are only for facilitating understanding of the solutions of the embodiments of the present application, and do not limit the present application.

scene one,

In the time synchronization scheme based on "frame synchronization", the network equipment acts as a standard clock source in the coverage cell to provide timing services for terminal equipment accessing the network equipment.

The network device sends the downlink reference signal according to the downlink frame structure, and the terminal device receives and detects the downlink reference signal, obtains the frame boundary of the downlink signal, and adjusts the timing of receiving the downlink frame (DL frame timing). The terminal device sends the uplink reference signal according to the uplink frame structure; the network device receives and detects the uplink reference signal, and determines the deviation between the actual arrival time of the uplink signal frame boundary and the uplink signal reception timing, that is, the timing advance (TA). The network device sends the timing advance TA to the terminal device, and the terminal device adjusts the timing advance of the uplink frame transmission relative to the downlink frame timing, so as to ensure that the deviation between the time when the uplink frame arrives at the network device and the timing when the network device receives the uplink frame is within the tolerance range of the system. Does not affect the uplink data reception performance.

其中，

表示下行信号的某个帧边界到达终端设备的接收天线的接口时网络设备时钟显示的时间；

表示下行参考信号的空口传播延迟。进一步地，终端设备可以获得终端设备发生特定事件时的本地时钟的时间

终端可以根据

和

以及无线帧结构的周期特点，获得网络设备与终端的时钟的偏差值，实现时间同步。The network device sends time information of a specific clock system to the terminal device, where the time information is used to indicate the time when a specific event occurs, for example, the time when a certain frame boundary of a downlink signal reaches the network device's transmitting antenna interface. The terminal device estimates the receiving time of the corresponding frame boundary of the downlink signal received by the terminal device according to the locally maintained timing advance N _TA and the network device sending the above-mentioned time information T _ref

in,

Indicates the time displayed by the network device clock when a certain frame boundary of the downlink signal reaches the interface of the receiving antenna of the terminal device;

Indicates the air interface propagation delay of the downlink reference signal. Further, the terminal device can obtain the time of the local clock when a specific event occurs in the terminal device

Terminal can be based on

and

As well as the periodic characteristics of the wireless frame structure, the deviation value of the clock of the network device and the terminal is obtained to realize time synchronization.

scene two,

终端设备接收并检测下行信号，并记录下行信号的接收时刻

终端设备向网络设备发送上行信号，并记录上行信号的发送时刻

网络设备接收并检测上行信号，并记录上行信号的接收时刻

通过上述四个时刻，可以计算出网络设备与终端的本地时钟的偏差Offset和无线信号的传播时间Delay:Time synchronization is achieved through the interaction of timestamps. The network device sends the downlink signal to the terminal device, and records the sending time of the downlink signal

The terminal equipment receives and detects the downlink signal, and records the reception time of the downlink signal

The terminal device sends the uplink signal to the network device, and records the sending time of the uplink signal

The network device receives and detects the uplink signal, and records the reception time of the uplink signal

Through the above four moments, the deviation Offset of the local clock between the network device and the terminal and the propagation time Delay of the wireless signal can be calculated:

最后，终端设备可以根据上述偏差Offset，或者传播时间Delay和下行参考信号的发送时刻

进行时钟修正，以实现时间同步。

Finally, the terminal device can use the above offset Offset, or the propagation time Delay and the transmission time of the downlink reference signal

Clock correction for time synchronization.

scene three,

从时钟节点根据这些计算结果完成时间同步。In the precision clock synchronization (institute of electrical and electronics engineers, IEEE 1588) protocol of network measurement and control systems, the node with an accurate clock source is called the master clock node (for example, network equipment), and the node that needs to calibrate the time with the master clock node is called the master clock node. For slave clock nodes (eg, end devices). The time synchronization process described in IEEE1588 is summarized as follows: First, the device nodes in the wired network determine the most accurate node in the network as the master clock node through the optimal clock algorithm, and at the same time determine the information propagation path from the master clock to the slave clock; the master clock node Send a synchronization message (Sync Message) to the slave clock node, and record the sending time T ₁ of the Sync Message according to the clock of the master clock node; receive the Sync Message from the slave clock node, and record the receiving time T ₂ of the Sync Message according to the clock of the slave clock node ; The master clock node sends a Follow_up Message to the slave clock node, which carries the time information T ₂ ; The slave clock node sends a Delay_req Message to the master clock node, and records the sending time T ₃ of the message according to the clock of the slave clock node; The master clock node receives Delay_req Message message, and record the reception time T ₄ of the message according to the clock of the master clock node; the master clock node sends a Delay_response Message message to the slave clock node, which carries the time information T ₄ ; the slave clock node according to the time information T ₁ , T ₂ , T ₃ , T ₄ , calculate the clock offset Offset between the slave clock node and the master clock node and the propagation time Delay or the loopback delay 2*Delay, the calculation formula is as follows

The slave clock node completes time synchronization according to these calculation results.

In the three scenarios for time synchronization described above, the beam directions used for transmitting uplink signals and transmitting downlink signals are not limited. However, the uplink signals and downlink signals sent on transmission paths with different beam directions experience The transmission times are also different, so that finally, in the process of time synchronization or loopback delay detection, measurement errors caused by different transmission times of wireless signals are introduced. In order to reduce the measurement error caused by the transmission of uplink signals and downlink signals through different beams, an embodiment of the present application provides a communication mechanism, in the process of transmitting reference signals, the network equipment is limited to receive beams for receiving uplink signals, and for sending downlink signals the transmit beam. On the other hand, in the process of transmitting the reference signal, the transmitting beam for transmitting the uplink reference signal by the terminal device and the receiving beam for receiving the downlink reference signal are defined. That is, by limiting the direction of the above-mentioned beam, the measurement error is reduced.

Since the above-mentioned beam for transmitting reference signals can be realized by adjusting the antenna weight vector of the receiving antenna of the wireless signal and the antenna weight vector of the transmitting antenna of the wireless signal, the communication method of the embodiment of the present application limits the beam of the transmission reference signal. The purpose can actually be achieved by defining the above-mentioned antenna weight vector. The communication method of the embodiment of the present application is described below with reference to FIG. 2 . It should be noted that if the antenna weight vector of the transmitting antenna of the wireless signal of the network device and the antenna weight vector of the receiving antenna of the wireless signal, and the antenna weight vector of the transmitting antenna of the wireless signal of the terminal device and the receiving antenna of the wireless signal The antenna weight vector of the antenna meets the constraints of the first antenna weight vector, the second antenna weight vector set, the third antenna weight vector, and the fourth antenna weight vector. At this time, it can be considered that the uplink signal and the downlink Signals are transmitted on the same path through beams in the same direction. When performing time synchronization or measuring loopback delay, the measurement error caused by the difference between the transmission path of the uplink signal and the transmission path of the downlink signal is minimized. , which is beneficial to improve the accuracy of time synchronization or detection of loopback delay.

It should be understood that the actual measurement of the arrival time of the wireless signal is achieved by detecting the reference signal carried in the wireless signal. In the description of the specific embodiments below, the target downlink reference signal and the target uplink reference signal are used to represent the wireless downlink signal and the wireless uplink signal that the wireless system needs to detect. The target downlink reference signal and the target uplink reference signal hereinafter may be the above-mentioned set of reference signals used for time synchronization or measurement of loopback delay. Specifically, it may be the above-mentioned reference signal in the existing communication system, or may be a signal having the same function as the above-mentioned reference signal in the future communication system. The reference signal may be at least one of the following reference signals: a channel state information-reference signal (CSIRS), a demodulation reference signal (DMRS), a phase-tracking reference signal, PTRS), primary/secondary synchronization signal (Primary Synchronization Signal/Secondary Synchronization Signal, PSS/SSS), channel sounding reference signal (Sounding Reference Signal, SRS) in the synchronization signal block, etc.

The above-mentioned CSI-RS is used for terminal equipment or network equipment to measure at least one type of channel state information, and the CSIRS may also be a reference signal used for measuring interference, for example, channel state information-interference measurement (CSI-interference measurement, CSI-IM) Reference signal, a reference signal for time-frequency tracking (CSI-RS for tracking/TRS).

The above DMRS is used for the terminal device or the network device to demodulate data and/or control information. Specifically, the demodulation may include performing channel estimation according to the DMRS, and using the channel estimation to demodulate the received signal of the data and/or control information (or in other words, de-constellation mapping, etc.), and further, may also include performing channel estimation according to the channel estimation. The demodulated signal is decoded and the like.

The above-mentioned PTRS is used for the terminal device or the network device to estimate the phase noise (or phase error, phase deviation, etc.) in the received signal. Further, the terminal device or the network device may also use the estimation result to process the phase noise in the received signal, such as correcting or compensating the phase noise.

FIG. 2 is a schematic diagram of a communication method according to an embodiment of the present application. The method shown in FIG. 2 includes step 210 and step 220 . It should be understood that the sequence of receiving the target downlink reference signal at 210 and sending the target uplink reference signal at 220 is not limited, and may be configured by the network device.

210. The target downlink reference signal sent by the network device to the terminal device.

The foregoing step 210 may specifically include three transmission modes of the target downlink reference signal.

In the first transmission mode of the target downlink reference signal, the terminal device may use the first antenna weight vector to receive the target downlink reference signal sent by the network device. Correspondingly, the network device may use the third antenna weight vector to send the target downlink reference signal to the terminal device.

In the second transmission mode of the target downlink reference signal, the terminal device may use the first antenna weight vector to receive the target downlink reference signal sent by the network device. Correspondingly, the network device sends the target downlink reference signal according to the traditional transmission method.

In the third transmission mode of the target downlink reference signal, the network device may use the third antenna weight vector to send the target downlink reference signal to the terminal device. Correspondingly, the terminal device may receive the target downlink reference signal sent by the network device according to the transmission mode of transmission.

220. The terminal device sends the target uplink reference signal to the network device.

The foregoing step 220 may specifically include three transmission modes of the target uplink reference signal.

In the first transmission mode of the target uplink reference signal, the terminal device may send the target uplink reference signal to the network device by using the second set of antenna weight vectors. Correspondingly, the network device may use the fourth antenna weight vector to receive the target uplink reference signal sent by the terminal device.

In the second transmission mode of the target uplink reference signal, the terminal device may send the target uplink reference signal to the network device by using the second set of antenna weight vectors. Correspondingly, the network device sends the target downlink reference signal according to the traditional transmission method.

In the third transmission mode of the target uplink reference signal, the network device may use the fourth antenna weight vector to receive the target uplink reference signal sent by the terminal device. Correspondingly, the terminal device may receive the target downlink reference signal sent by the network device according to the transmission mode of transmission.

Wherein, the relationship between the second antenna weight vector set and the first antenna weight vector may be that the second antenna weight vector set and the first antenna weight vector have the same ratio of weight amplitudes corresponding to the same antenna, and /or the second antenna weight vector set and the weight phase of the first antenna weight vector corresponding to the same antenna are in the same phase.

The above-mentioned second antenna weight vector set and the first antenna weight vector have the same ratio of weight amplitudes corresponding to the same antenna, which can be understood as the same ratio of power gain of the transmitted or received signals corresponding to the same antenna, and can also be understood as the corresponding The weight or power gain ratio between the two antennas of the terminal device is the same. The above-mentioned second antenna weight vector set and the weight phase corresponding to the same antenna in the first antenna weight vector are the same, which can be understood as the same phase difference between the corresponding two antennas of the terminal device. The above-mentioned first antenna weight vector and the second antenna weight vector set have the same ratio of antenna weights corresponding to the same antenna. It can be understood that the first antenna weight vector and the second antenna weight vector set correspond to the same physical antenna. The phases are the same, and the ratios of the amplitudes of the first antenna weight vector and the second antenna weight vector set corresponding to the same physical antenna are the same.

其中，

表示天线1接收目标下行参考信号使用的权值，

表示天线1传输目标下行参考信号使用的相位，α₁表示天线1传输目标下行参考信号使用的幅度；

表示天线2接收目标下行参考信号使用的权值，

表示天线2传输目标下行参考信号使用的相位，α₂表示天线2传输目标下行参考信号使用的幅度。第二天线权值向量集合中的一个天线权值向量指示的天线发送上行参考信号的权值为

其中，

表示天线1发送目标上行参考信号使用的权值，

表示天线1传输目标上行参考信号使用的相位，α₃表示天线1传输目标上行参考信号使用的幅度；

表示天线2发送目标上行参考信号使用的权值，

表示天线1传输目标上行参考信号使用的相位，α₄表示天线1传输目标上行参考信号使用的幅度。此时，第一天线权值向量与第二天线权值向量集合中对应同一物理天线的幅度的比例相同，可以表示为

特别地，当

时，第一天线权值向量与第二天线权值向量集合中对应同一天线的幅度相同；第一天线权值向量与第二天线权值向量集合中对应同一天线的相位相同，可以表示为

For example, assuming that a 2T2R terminal device is configured with two antennas, namely antenna 1 and antenna 2, the weight vector of the downlink reference signal received by the antenna indicated in the first antenna weight vector is:

in,

represents the weight used by antenna 1 to receive the target downlink reference signal,

represents the phase used by antenna 1 to transmit the target downlink reference signal, and α ₁ represents the amplitude used by antenna 1 to transmit the target downlink reference signal;

represents the weight used by antenna 2 to receive the target downlink reference signal,

represents the phase used by the antenna 2 to transmit the target downlink reference signal, and α ₂ represents the amplitude used by the antenna 2 to transmit the target downlink reference signal. The weight of the uplink reference signal sent by the antenna indicated by an antenna weight vector in the second antenna weight vector set is

in,

represents the weight used by antenna 1 to send the target uplink reference signal,

Represents the phase used by antenna 1 to transmit the target uplink reference signal, and α ₃ represents the amplitude used by antenna 1 to transmit the target uplink reference signal;

represents the weight used by antenna 2 to send the target uplink reference signal,

represents the phase used by the antenna 1 to transmit the target uplink reference signal, and α ₄ represents the amplitude used by the antenna 1 to transmit the target uplink reference signal. At this time, the ratio of the amplitude of the first antenna weight vector and the second antenna weight vector set corresponding to the same physical antenna is the same, which can be expressed as

In particular, when

When , the first antenna weight vector and the second antenna weight vector set have the same amplitude corresponding to the same antenna; the first antenna weight vector and the second antenna weight vector set have the same phase corresponding to the same antenna, which can be expressed as

Exemplarily, the ratio of the antenna weights corresponding to the same antenna in the third antenna weight vector and the fourth antenna weight vector is the same. It can be understood that the third antenna weight vector and the fourth antenna weight vector correspond to the same physical antenna. The phases of , and the third antenna weight vector and the fourth antenna weight vector have the same ratio of the amplitudes corresponding to the same physical antenna. Wherein, the third antenna weight vector and the fourth antenna weight vector have the same ratio of the weight amplitude corresponding to the same antenna, which can be understood as the same ratio of power gain of the transmitted or received signal corresponding to the same antenna, and can also be understood as The weight or power gain ratio between the two antennas of the corresponding network device is the same. The third antenna weight vector set and the fourth antenna weight vector have the same weight phase corresponding to the same antenna, which can be understood as the same phase difference between the corresponding two antennas of the network device.

其中，

表示天线1传输目标下行参考信号使用的权值，

表示天线1传输目标下行参考信号使用的相位，α₁表示天线1传输目标下行参考信号使用的幅度；

表示天线2传输目标下行参考信号使用的权值，

表示天线2传输目标下行参考信号使用的相位，α₂表示天线2传输目标下行参考信号使用的幅度。第四天线权值向量中指示的每根天线接收上行参考信号的权值向量为

其中，

表示天线1接收目标上行参考信号使用的权值，

表示天线1传输目标上行参考信号使用的相位，α₃表示天线1传输目标上行参考信号使用的幅度；

表示天线2接收目标上行参考信号使用的权值，

表示天线2传输目标上行参考信号使用的相位，α₄表示天线2传输目标上行参考信号使用的幅度。此时，第三天线权值向量与第四天线权值向量中对应同一天线的幅度的比例相同，可以表示为

特别地，

时，第三天线权值向量与第四天线权值向量中对应同一物理天线的幅度相同；第三天线权值向量与第四天线权值向量中对应同一天线的相位相同，可以表示为

For example, assuming that two antennas are configured on the network device, namely, antenna 1 and antenna 2, the weight vector of the target downlink reference signal sent by each antenna indicated in the third antenna weight vector is:

in,

represents the weight used by antenna 1 to transmit the target downlink reference signal,

represents the phase used by antenna 1 to transmit the target downlink reference signal, and α ₁ represents the amplitude used by antenna 1 to transmit the target downlink reference signal;

represents the weight used by antenna 2 to transmit the target downlink reference signal,

represents the phase used by the antenna 2 to transmit the target downlink reference signal, and α ₂ represents the amplitude used by the antenna 2 to transmit the target downlink reference signal. The weight vector of the uplink reference signal received by each antenna indicated in the fourth antenna weight vector is:

in,

represents the weight used by antenna 1 to receive the target uplink reference signal,

Represents the phase used by antenna 1 to transmit the target uplink reference signal, and α ₃ represents the amplitude used by antenna 1 to transmit the target uplink reference signal;

represents the weight used by antenna 2 to receive the target uplink reference signal,

represents the phase used by the antenna 2 to transmit the target uplink reference signal, and α ₄ represents the amplitude used by the antenna 2 to transmit the target uplink reference signal. At this time, the ratio of the third antenna weight vector and the fourth antenna weight vector corresponding to the amplitude of the same antenna is the same, which can be expressed as

Particularly,

When , the third antenna weight vector and the fourth antenna weight vector have the same amplitude corresponding to the same physical antenna; the third antenna weight vector and the fourth antenna weight vector have the same phase corresponding to the same antenna, which can be expressed as

Optionally, as an embodiment, the network device uses the fourth antenna weight to receive the target uplink reference signal on the at least one uplink transmission resource; the network device combines the target uplink reference signals, and detects the target uplink reference signal. the arrival time of the signal.

The above-mentioned uplink transmission resources may include at least one of time domain resources, frequency domain resources and code domain resources. As long as at least one of the above three types of resources included in the transmission resource is different, it can be regarded as different transmission resources.

In the embodiment of the present application, by configuring the above-mentioned first antenna weight vector and second antenna weight vector set, the spatial energy distribution of the beam for transmitting the target uplink reference signal and the spatial energy distribution of the beam for receiving the target downlink reference signal are adjusted. , so that the spatial energy distribution of the beam transmitting the target uplink reference signal is similar to the spatial energy distribution of the beam receiving the target downlink reference signal, which is beneficial to reduce the transmission error of the transmission target uplink signal and the transmission target downlink signal, so as to reduce the time synchronization or loopback detection. error.

In the embodiment of the present application, by configuring the third antenna weight vector and the fourth antenna weight vector, the spatial energy distribution of the beam receiving the target uplink reference signal and the spatial energy distribution of the beam transmitting the target downlink reference signal are adjusted, Make the spatial energy distribution of the beam receiving the target uplink reference signal approximate the spatial energy distribution of the beam transmitting the target downlink reference signal, which is beneficial to reduce the transmission error of the transmission target uplink signal and the transmission target downlink signal, so as to reduce the time synchronization or loopback detection. error.

Of course, if the above-mentioned first antenna weight vector, second antenna weight vector set, third antenna weight vector and fourth antenna weight vector satisfy the above conditions at the same time, then the beams used by the target uplink reference signal and the target downlink reference signal The spatial energy distribution of the target uplink reference signal and the target downlink reference signal are similar, so that the transmission time occupied by the target uplink reference signal and the target downlink reference signal in the path is similar, which is beneficial to improve the accuracy of time synchronization or detection of loopback delay. This avoids that in the prior art, since the transmission time occupied by the transmission of the uplink reference signal and the downlink reference signal in the path differs greatly, the accuracy of time synchronization or loopback delay detection is low.

The following describes several feasible implementation solutions for configuring the first antenna weight vector, the second antenna weight vector set, the third antenna weight vector, and the fourth antenna weight vector.

For the situation that the number of transmit antennas used by the terminal device to send the target uplink reference signal is less than the number of receive antennas used to receive the target downlink reference signal, there are two implementations. The first implementation is to occupy multiple uplink transmission resources to send the target uplink reference signal. Different antennas are used for each uplink transmission resource, so that all antennas of the terminal device have the opportunity to send the target uplink reference signal; in implementation mode 2, the number of receiving antennas for receiving the target downlink reference signal is reduced, so that the number of receiving antennas occupied by the target uplink reference signal is reduced. The antenna is the same as the antenna occupied by receiving the target downlink reference signal. These two methods correspond to the three implementation schemes described later.

For the terminal equipment in which the number of transmitting antennas for the target uplink reference signal is equal to the number of receiving antennas for the target downlink reference signal, the target uplink reference signal and the target downlink reference signal are also required to meet the above-mentioned constraints. The three implementation schemes introduced complete the configuration of the reference signal.

Implementation manner 1: Occupy multiple uplink transmission resources to send the target uplink reference signal.

In this implementation manner, considering that the number of transmitting antennas of the terminal device is less than the number of receiving antennas, the terminal device needs to ensure that each antenna has the opportunity to send the target uplink reference signal, so that the network device can correctly detect the target uplink The arrival time of the reference signal. Therefore, the terminal device needs to occupy a plurality of uplink transmission resources, and each uplink transmission resource corresponds to its own transmitting antenna, so that the antenna of the terminal device has the opportunity to transmit the target uplink reference signal. This transmission method is called antenna switching in the 3GPP communication protocol, and is a mode of SRS transmission.

However, it is stipulated in the current protocol that the antenna weights of the SRS for antenna switching are equal in power and have no difference. In this patent, in order to achieve the same constraints as the spatial energy distribution of the target uplink reference signal and the spatial energy distribution of the target downlink reference signal described above, it is necessary to configure the corresponding transmit antenna weights for the target uplink reference signal for antenna switching, that is, the first Two-antenna weight vector set. The second antenna weight vector set may include multiple second antenna weight vectors, and each second antenna weight vector is applied to each corresponding uplink transmission resource, indicating the antenna weight used when sending the target uplink reference signal. In this implementation manner, the terminal device can determine the second antenna weight vector set according to the first antenna weight vector and the correspondence between the receiving antenna of the target downlink reference signal and the transmitting antenna of the target uplink reference signal.

The following describes a method for transmitting a reference signal according to an embodiment of the present application with reference to FIG. 3 to FIG. 5 . It should be understood that the method for transmitting a reference signal in this embodiment of the present application is only described below by using a 1T2R terminal device as an example, and does not limit the type of terminal device to which the embodiment of the present application is applicable.

则终端设备发送目标上行参考信号时，可以分为两轮的目标上行参考信号的发送过程，其中，第一轮发送目标上行参考信号的过程中，可以通过天线1向网络设备发送目标上行参考信号，且使用的第二天线权值向量为

(参见图4)，其中ω₅′＝f(ω₅)是根据ω₅生成的；第二轮发送目标上行参考信号的过程中，可以通过天线2向网络设备发送目标上行参考信号，且使用的第二天线权值向量为

)，其中ω₆′＝f(ω₆)是根据ω₆生成的(参见图5)，此时，第二天线权值向量集合ω_UL,Tx＝{ω_UL,Tx ¹,ω_UL,Tx ²}。In the transmission process of the target downlink reference signal shown in FIG. 3, the terminal device can receive the target downlink reference signal sent by the network device through two antennas (antenna 1 and antenna 2), and the first antenna vector weight is

Then, when the terminal device sends the target uplink reference signal, it can be divided into two rounds of sending the target uplink reference signal. In the process of sending the target uplink reference signal in the first round, the target uplink reference signal can be sent to the network device through the antenna 1. , and the second antenna weight vector used is

(See FIG. 4 ), where ω ₅ ′=f(ω ₅ ) is generated according to ω ₅ ; in the process of sending the target uplink reference signal in the second round, the target uplink reference signal can be sent to the network device through the antenna 2, and the target uplink reference signal can be sent using The second antenna weight vector of is

), where ω ₆ ′=f(ω ₆ ) is generated according to ω ₆ (see FIG. 5 ), at this time, the second antenna weight vector set ω _UL,Tx ={ω _UL,Tx ¹ ,ω _UL,Tx ² }.

Optionally, as an embodiment, the method for the terminal device to determine the second antenna weight vector set according to the first antenna weight vector may include the terminal device determining the target downlink reference according to the first antenna weight vector. The antenna weight for each of the signal's receive antennas. The terminal device determines the target downlink reference signal according to the antenna weight of each receiving antenna in the receiving antennas of the target downlink reference signal and the corresponding relationship between the transmitting antenna of the target uplink reference signal and the receiving antenna of the target downlink reference signal. the second antenna weight vector set.

Optionally, the target uplink reference signal may be a sounding reference signal (sounding reference signal for antenna switching, SRS for antenna switching) sent by the terminal device in an antenna switching mode, the SRS occupies multiple uplink transmission resources, and each uplink transmission resource The transmit antennas of the corresponding target uplink target reference signals are different.

Sending, by the terminal device, the target uplink reference signal to the network device according to the second antenna weight vector set includes: the terminal device occupying at least one uplink transmission resource according to the second antenna weight vector set, and sending the target uplink reference signal to the network device according to the second antenna weight vector set. Send the target uplink reference signal. The transmission antenna sets of the target uplink reference signal corresponding to different antenna weight vectors in the second antenna weight vector set are different. The transmission antenna sets of the target uplink reference signal corresponding to different uplink transmission resources in the at least one uplink transmission resource are different, and the switching mode and transmission order of the transmission antenna set used by the target uplink reference signal are specified by the protocol or by The network device is configured to the terminal device through signaling or preset.

K和Q为正整数。The second antenna weight vector set includes at least one second antenna weight vector, and each second antenna weight vector is used to indicate the antenna weight of the P antennas in the M antennas for transmitting the target uplink reference signal. value, where P is a positive integer and P is less than or equal to M. The terminal device sending the target uplink reference signal to the network device may include: sending the target uplink reference signal Q times to the network device through the P transmission antennas and according to the second antenna weight vector set Uplink reference signal, where Q is greater than or equal to K,

K and Q are positive integers.

In the first implementation, there are four different ways to generate the second antenna weight vector, that is, the function f(ω) has four forms. Correspondingly, the network device receives the target uplink reference signal in four different ways. processing method.

Generation mode 1, the ratio of the second antenna weight vector set and the first antenna weight vector corresponding to the weight amplitude of the same antenna is the same, and the second antenna weight vector set and the first antenna weight vector corresponding to the same antenna. The weights have the same phase, that is, f ₁ (ω)=ω·C, where C is a constant in the complex number domain, which represents the adjustment of the weight vector by the terminal device, which may be a normalization operation. The network device uses the fourth antenna weight vector to receive the target uplink reference signal; the network device directly combines the target uplink reference signal, and detects the arrival time of the uplink signal.

In the second generation method, the second antenna weight vector set and the first antenna weight vector have the same ratio of weight amplitudes corresponding to the same antenna, that is, f ₂ (ω)=|ω|·C. It can be understood that the weighting method of the signal by the terminal device only includes the amplitude information in the first antenna weight vector, and the phase information of the first antenna weight vector can be obtained by the network device as the weighting information of the target uplink reference signal, That is, the terminal device sends first information to the network device, where the first information includes phase information of the first antenna weight vector. Correspondingly, the network device determines a first weighting parameter according to the phase information, and combines the target uplink reference signals according to the first weighting parameter.

Optionally, the above-mentioned first information may be information in a multiplexed existing communication system, for example, radio resource control (radio resource control, RRC) signaling, media access control control element (media access control control element, MAC CE) signaling ), downlink control information (downlink control information, DCI), etc. The above-mentioned first information may also be information newly configured specially for the transmission phase information. The embodiment of the present application does not limit the type and combination of the first information.

其中

为一个固定角度旋转，由终端设备决定，可以理解为，终端设备对信号的加权方式仅包含了第一天线权值向量中的相位信息，而考虑天线的幅度信息作为目标上行参考信号的加权信息由网络设备获得。即所述终端设备向所述网络设备发送第二信息，所述第二信息包含所述第一天线权值向量的幅度信息。相应地，由网络设备根据幅度信息确定第二加权参数，并根据第二加权参数对目标上行参考信号进行合并。The third generation method, the second antenna weight vector set is the same as the phase corresponding to the same antenna in the first antenna weight vector, that is,

in

It is a fixed angle rotation, which is determined by the terminal device. It can be understood that the weighting method of the terminal device to the signal only includes the phase information in the weight vector of the first antenna, and the amplitude information of the antenna is considered as the weighting information of the target uplink reference signal. obtained by the network device. That is, the terminal device sends second information to the network device, where the second information includes amplitude information of the first antenna weight vector. Correspondingly, the network device determines the second weighting parameter according to the amplitude information, and combines the target uplink reference signals according to the second weighting parameter.

Optionally, the above-mentioned second information may be the information in the multiplexed existing communication system, for example, RRC signaling, MACCE, DCI, etc. The above-mentioned second information may also be information newly configured for transmission phase information. This is not limited in the application examples.

In the fourth generation mode, the terminal device sends the target uplink reference signal to the network device according to the antenna weight vector in the equal power mode specified in the existing protocol, that is, f ₄ (ω)=C. The information of the first antenna weight vector is not included in the second antenna weight vector set. The first antenna weight vector is obtained by the network device as weighting information of the target uplink reference signal. The network device receives the fourth information sent by the terminal device, where the fourth information includes amplitude and phase information of the first antenna weight vector, and the first antenna weight vector indicates the antenna weight of the receiving antenna of the target downlink reference signal, The network device determines a fourth weighting parameter according to the first antenna weight vector, and combines the target uplink reference signals by using the fourth weighting parameter.

Specifically, there are two feasible implementation manners for the terminal device to use the second antenna weight vector set to send the target uplink reference signal. The antenna weight vector set may be the weighted values of signal transmission by each transmit antenna of the terminal device; it may also be the power adjustment of the reference signal and/or the phase adjustment of the reference signal in the process of generating the target uplink reference signal.

Specifically, when the number of transmitting antennas of the terminal device is equal to the number of receiving antennas, the target uplink reference signal may not use the antenna switching mode. At this time, only one antenna weight vector is included in the second antenna weight vector set.

To sum up, the workflow of implementing the first solution is as follows. The following is only an example for understanding the technical solution of the present invention. The present invention includes but is not limited to the following steps:

In the first step, the network device configures the target downlink reference signal and the target uplink reference signal for the terminal device, and the configuration information includes the signal type of the reference signal, time-frequency resources and other necessary parameters of the reference signal defined in the protocol.

In the second step, the terminal device determines a first antenna weight vector, and determines a second antenna weight vector set according to the first antenna weight vector. The manner of determining the first antenna weight vector is determined by the manner defined in the protocol, such as a Quasi-Co-Location (Quasi-Co-Location, QCL) relationship between downlink reference signals, or beam training. The second antenna weight vector set is obtained according to the four methods mentioned in this implementation solution.

In the third step, the terminal device feeds back necessary information to the network device for determining the weighted value of the target uplink reference signal.

In the fourth step, the terminal device sends the target uplink reference signal according to the configuration information and the second antenna weight vector.

In the fifth step, the network device receives the target uplink reference signal and performs weighting according to the weighting value.

The first to fifth steps in this embodiment are only examples for understanding the technical solution of the present invention, and the execution steps of the above implementation manner are not limited in order.

The second implementation solution is to reduce the number of receiving antennas that receive the target downlink reference signal. That is, according to the antenna weight vector of the transmitting antenna of the target uplink reference signal, the antenna weight vector of the receiving antenna of the target downlink reference signal is determined, so as to ensure the symmetry of the arrival time of the detected downlink target reference signal and the detected target uplink reference signal, and make up for the symmetry of the detected target uplink reference signal. In the original protocol, the number of receiving antennas and the number of transmitting antennas of the terminal equipment are different, and it is impossible to configure the same shortcoming of the beam for transmitting the target uplink reference signal and the beam for transmitting the target downlink reference signal, and this implementation mode 2 has less changes to the existing communication protocol. .

The terminal device determines, according to the second antenna weight vector used by the target uplink reference signal and the transmitting antenna of the target uplink reference signal, the first antenna weight vector used by the target downlink reference signal and the target downlink reference signal. The receiving antenna for the reference signal.

The following describes a method for transmitting a reference signal according to an embodiment of the present application with reference to FIG. 6 to FIG. 7 . It should be understood that the method for transmitting a reference signal in this embodiment of the present application is only described below by using a 1T2R terminal device as an example, and does not limit the type of terminal device to which the embodiment of the present application is applicable.

则终端设备接收目标下行参考信号时，可以仅通过天线1接收网络设备发送的目标下行参考信号(参见图7)，且终端设备接收目标下行参考信号使用的第一天线权值向量为

In the transmission process of the target uplink reference signal shown in FIG. 6 , the terminal device can send the target uplink reference signal to the network device through one antenna (antenna 1), and the second antenna weight vector set includes only one second antenna weight value vector, the second antenna weight vector is

Then, when the terminal device receives the target downlink reference signal, it can only receive the target downlink reference signal sent by the network device through antenna 1 (see FIG. 7 ), and the first antenna weight vector used by the terminal device to receive the target downlink reference signal is:

In particular, since some antennas of the terminal device do not transmit uplink signals, the antenna weights of the antennas that do not transmit uplink signals in the second antenna weight vector are represented as 0; since all antennas of the terminal device receive downlink signals , the antenna weights of the antennas that do not need to receive or process the target downlink reference signal in the first antenna weight vector are set to 0.

Specifically, the first antenna weight vector is only used for receiving the target downlink reference signal, and not used for receiving other downlink signals.

Optionally, as an embodiment, the method further includes: determining, by the terminal device, the receiving antenna of the target downlink reference signal according to the transmitting antenna of the target uplink reference signal, or determining, by the terminal device, the receiving antenna of the target downlink reference signal according to the first For the transmitting antennas corresponding to the two antenna weight vectors, the receiving antenna corresponding to the first antenna weight vector is determined.

Optionally, as an embodiment, the method further includes: determining, by the terminal device, the first antenna weight vector according to the second antenna weight vector, and the second antenna weight vector is the same as the first antenna weight vector. The weights corresponding to the same antenna in an antenna weight vector are the same.

Optionally, as an embodiment, the method further includes: a network device sending third information to the terminal device, where the third information is used to indicate a resource id (resource id) and an all-resource id of the target uplink reference signal. Describe the target downlink reference signal resource number.

Specifically, the above-mentioned different resource numbers correspond to different reference signals. The target uplink reference signal and the target downlink reference signal that meet the above-mentioned transmission conditions (the number of transceiver antennas used, the antenna weight used by each antenna, etc.) can be configured by the network device for the terminal device as time synchronization, or to detect a loopback delay. Group reference signal.

It should be noted that the above-mentioned target uplink reference signal and target downlink reference signal may be selected from known reference signals, or may be reference signals newly configured by a network device, which are not specifically limited in this embodiment of the present application.

Specifically, for a terminal device whose number of receiving antennas is equal to the number of transmitting antennas, there is no element set to zero in the first antenna weight vector, and all receiving antennas have corresponding non-zero weights.

To sum up, the workflow of realizing the second solution is as follows. The following is only an example for understanding the technical solution of the present invention. The present invention includes but is not limited to the following steps:

In the first step, the network device configures the target uplink reference signal for the terminal device, and the configuration information includes the signal type of the reference signal, the necessary parameters of the reference signal defined in the protocol, such as time-frequency resources. The target uplink reference signal is an independently configured new uplink reference signal, or a reference signal selected from existing uplink reference signals.

In the second step, the network device configures a target downlink reference signal for the terminal device. The target downlink reference signal can be a new downlink reference signal independently configured, and the configuration information includes the signal type of the reference signal, the necessary parameters of the reference signal defined in the protocol, such as time-frequency resources, etc.; it can also be a multiplexing of the existing downlink reference signal.

In the third step, the terminal device determines the first antenna weight vector. The terminal device obtains the second antenna weight vector of the target uplink reference signal according to the existing procedure of the protocol. The first antenna weight vector set is determined according to the second antenna weight vector. In the case of multiplexing the existing downlink reference signal, the terminal device uses the first antenna weight vector to replace the original antenna weight vector, and receives the target downlink reference signal.

In the fourth step, the terminal device receives the target downlink reference signal according to the configuration information and the first antenna weight vector.

In the fifth step, the terminal device receives the target uplink reference signal and detects the arrival time of the downlink signal.

Implementation solution 3: Configure the terminal equipment to use some antennas to work, to ensure that the terminal equipment uses the same antenna to receive downlink signals and send uplink signals. Because the current protocol does not clearly stipulate the type of the reference signal for detecting the arrival time of the uplink signal. Therefore, in order not to affect the protocol of the uplink channel, it is necessary to limit the receiving antenna of the downlink channel.

In the currently known reference signal transmission process, part of the reference signal can be transmitted on the same beam as the data. Therefore, the antenna weight used for the transmission channel can be limited by limiting the antenna weight used for transmitting the reference signal. the goal of.

That is, the terminal device uses the first antenna weight vector to receive the first channel sent by the network device, and the first channel carries the first data signal and the target downlink reference signal; the terminal device uses the second antenna weight vector to send to the network device. the second channel, where the second data signal and the target uplink reference signal are carried in the second channel.

Correspondingly, the network device uses the third antenna weight vector to receive the first channel sent by the terminal device, and the first channel carries the first data signal and the target downlink reference signal; the network device uses the fourth antenna weight vector to receive the data sent by the terminal device. the second channel, where the second data signal and the target uplink reference signal are carried in the second channel.

For example, the first channel may be a physical downlink shared channel (PDSCH), the second channel may be a physical uplink shared channel (PUSCH), and the network device may be based on the first channel and the second channel. The reciprocity of , configure the first antenna weight vector, the second antenna weight vector set, the third antenna weight vector and the fourth antenna weight vector. At this time, the target uplink reference signal may be DMRS or a combination of DMRS and PTRS.

The following describes the method for the network device to determine the third antenna weight vector and the fourth antenna weight vector. It should be noted that the method for the network device to determine the above-mentioned antenna weight vector may be the same as the above method for the terminal device to determine the first antenna weight vector and The second antenna weight vector set method is used in combination.

Specifically, the network device determines a fourth antenna weight vector according to the third antenna weight vector, the corresponding relationship between the transmitting antenna of the target downlink reference signal and the receiving antenna of the target uplink reference signal, and the fourth antenna weight vector is related to the The proportions of the antenna weights corresponding to the same antenna in the third antenna weight vector are the same.

Specifically, the network device determines a third antenna weight vector according to the fourth antenna weight vector, the corresponding relationship between the receiving antenna of the target uplink reference signal and the transmitting antenna of the target downlink reference signal, and the fourth antenna weight vector is related to the The proportions of the antenna weights corresponding to the same antenna in the third antenna weight vector are the same.

The communication method of the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 7 , and the apparatus of the embodiment of the present application is described in detail below with reference to FIG. 8 to FIG. 11 . It should be understood that the apparatuses shown in FIG. 8 to FIG. 11 can implement each step in FIG. 1 to FIG. 7 , and in order to avoid repetition, details are not described herein again.

FIG. 8 is a schematic diagram of a communication apparatus according to an embodiment of the present application, where the apparatus is configured to execute the behavior function of the terminal device in the foregoing method embodiment. The apparatus 800 shown in FIG. 8 includes a receiving module 810 and a sending module 820, wherein:

A receiving module 810, configured to receive the target downlink reference signal sent by the network device by using the first antenna weight vector;

a sending module 820, configured to send the target uplink reference signal to the network device by using the second set of antenna weight vectors;

Wherein, the ratio of the second antenna weight vector set and the first antenna weight vector corresponding to the weight amplitude of the same antenna is the same, and/or the second antenna weight vector set and the first antenna The weights corresponding to the same antenna in the weight vector have the same phase.

Optionally, as an embodiment, the apparatus further includes: a processing module configured to, according to the first antenna weight vector, the receiving antenna of the target downlink reference signal received by the receiving module, and the data sent by the sending module. The corresponding relationship between the transmitting antennas of the target uplink reference signal is used to determine the second antenna weight vector set.

Optionally, as an embodiment, the processing module is specifically configured to: determine the antenna weight of each receiving antenna in the receiving antennas of the target downlink reference signal according to the first antenna weight vector, and according to the The antenna weight of each receiving antenna in the receiving antennas of the target downlink reference signal, and the corresponding relationship between the transmitting antenna of the target uplink reference signal and the receiving antenna of the target downlink reference signal, to determine the second antenna weight vector gather.

Optionally, as an embodiment, the sending module is specifically configured to: occupy at least one uplink transmission resource according to the second antenna weight vector set, and send the target uplink reference signal to the network device, the second The transmission antenna sets of the target uplink reference signal corresponding to different antenna weight vectors in the antenna weight vector set are different, and the transmission antennas of the target uplink reference signal corresponding to different uplink transmission resources in the at least one uplink transmission resource Collections are different.

Optionally, as an embodiment, the sending module is further configured to: when the second antenna weight vector set and the weight amplitude ratio of the first antenna weight vector corresponding to the same antenna are the same, send the information to the The network device sends first information, where the first information includes phase information of the first antenna weight vector.

Optionally, as an embodiment, the sending module is further configured to send to the network device when the second antenna weight vector set and the first antenna weight vector have the same phase corresponding to the same antenna. second information, where the second information includes amplitude information of the first antenna weight vector.

Optionally, as an embodiment, the processing module is further configured to, when the second antenna weight vector set includes a second antenna weight vector, use the second antenna weight vector according to the target uplink reference signal. The antenna weight vector and the transmitting antenna of the target uplink reference signal, determine the first antenna weight vector used by the target downlink reference signal and the receiving antenna of the target downlink reference signal.

Optionally, as an embodiment, the receiving module is further configured to receive third information from the network device, where the third information is used to indicate the resource number of the target uplink reference signal and the target downlink reference Signal resource number.

Optionally, as an embodiment, the processing module is further configured to determine the receiving antenna of the target downlink reference signal according to the transmitting antenna of the target uplink reference signal, or according to the corresponding weight vector of the second antenna. The transmitting antenna determines the receiving antenna corresponding to the first antenna weight vector.

Optionally, as an embodiment, the processing module is further configured to determine the first antenna weight vector according to the second antenna weight vector, where the second antenna weight vector is related to the first antenna weight vector. The weights corresponding to the same antenna in the value vector are the same.

Optionally, as an embodiment, the receiving module is further configured to use the first antenna weight vector to receive a first channel sent by the network device, where the first channel carries the first data signal and the The target downlink reference signal is used, and the second antenna weight vector is used to send a second channel to the network device, where the second channel carries the second data signal and the target uplink reference signal.

In an optional embodiment, the receiving module 810 may be a receiver, the sending module 820 may be a transmitter, and the above-mentioned processing module may be a processor.

FIG. 9 is a schematic diagram of a communication apparatus according to an embodiment of the present application, where the apparatus is configured to execute the behavior function of the terminal device in the foregoing method embodiment. The apparatus 900 shown in FIG. 9 includes a sending module 910 and a receiving module 920, wherein:

A sending module 910, configured to send fourth information to the network device, where the fourth information includes a first antenna weight vector;

The receiving module 920 is configured to use the first antenna weight vector to receive the target downlink reference signal sent by the network device.

It should be understood that the terminal device sends the fourth information to the network device, so that the network device determines the weighting parameters of the multiple uplink transmission resources of the target uplink reference signal according to the first antenna weight vector. The transmission weight of the target uplink reference signal is obtained according to the calculation method specified in the existing protocol, so that the generation method of the uplink reference signal is kept unchanged, and the transmission rule of the uplink reference signal of the terminal device is guaranteed to be unchanged.

Optionally, as an embodiment, the antenna weight of the transmitting antenna of the target downlink reference signal is determined according to a third antenna weight vector, and the third antenna weight vector and the fourth antenna weight vector correspond to the same antenna. The antenna weights of the antennas are the same, and the fourth antenna weight vector is the antenna weight vector of the receiving antenna that transmits the uplink reference signal.

Optionally, as an embodiment, the foregoing sending module is further configured to: send the fourth information to the network device, where the fourth information is carried in at least one of the following information: downlink control information DCI, Radio resource control RRC and medium intervention control layer control unit MAC CE.

In an optional embodiment, the sending module 910 may be a transmitter, and the receiving module 920 may be a receiver.

FIG. 10 is a schematic diagram of a communication apparatus according to an embodiment of the present application. The apparatus is configured to perform the behavior function of the network device in the above method embodiment. The apparatus 1000 shown in FIG. 10 includes a sending module 1010 and a receiving module 1020, wherein:

The sending module 1010 is configured to send the target downlink reference signal to the terminal device by using the third antenna weight vector;

The receiving module 1020 is configured to use a fourth antenna weight vector to receive the target uplink reference signal sent by the sending module, wherein the third antenna weight vector and the fourth antenna weight vector correspond to the antennas of the same antenna The weight ratio is the same.

Optionally, as an embodiment, the apparatus further includes: a processing module configured to, according to a third antenna weight vector, determine the target uplink reference signal sent by the sending module on the receiving antenna and the target uplink received by the receiving module. The correspondence between the transmitting antennas of the signal is referred to, and a fourth antenna weight vector is determined. The fourth antenna weight vector has the same ratio as the antenna weight corresponding to the same antenna in the third antenna weight vector, wherein the The third antenna weight vector is used to indicate the antenna weight of the transmitting antenna of the target downlink reference signal, and the fourth weight vector is used to indicate the antenna weight of the receiving antenna of the target uplink reference signal.

Optionally, as an embodiment, the target uplink reference signal occupies at least one uplink transmission resource, and different uplink transmission resources in the at least one uplink transmission resource correspond to the transmission antenna set and antenna weight of the target uplink reference signal. The value vector is different.

Optionally, as an embodiment, the receiving module is configured to use the fourth antenna weight to receive the target uplink reference signal on the at least one uplink transmission resource;

The processing module is further configured to combine the target uplink reference signal and detect the arrival time of the target uplink reference signal.

Optionally, as an embodiment, the method receiving module is configured to receive first information sent by a terminal device, where the first information includes phase information of a first antenna weight vector, and the first antenna weight vector indicates The antenna weight of the receiving antenna of the target downlink reference signal.

Optionally, as an embodiment, the processing module is specifically configured to determine a first weighting parameter according to the phase information, and combine the target uplink reference signals according to the first weighting parameter.

Optionally, as an embodiment, the receiving module is further configured to receive second information sent by a terminal device, where the second information includes amplitude information of the first antenna weight vector, the first antenna weight The vector indicates the antenna weight of the receiving antenna of the target downlink reference signal.

Optionally, as an embodiment, combining the target uplink reference signals by the network device includes: determining, by the network device, a second weighting parameter according to the amplitude information, and performing the combination of the target uplink reference signal according to the second weighting parameter. The target uplink reference signal is combined.

Optionally, as an embodiment, the receiving module is further configured to receive fourth information sent by the terminal device, where the fourth information includes a first antenna weight vector, and the first antenna weight vector indicates the The antenna weight of the receiving antenna of the target downlink reference signal.

Optionally, as an embodiment, the processing module is specifically configured to determine a third weighting parameter according to the first antenna weight vector, and use the third weighting parameter to combine the target uplink reference signals.

Optionally, as an embodiment, the processing module is further configured to determine the target downlink reference signal corresponding to the target uplink reference signal according to the target uplink reference signal; or determine the corresponding downlink reference signal according to the target downlink reference signal Target uplink reference signal.

Optionally, as an embodiment, the sending module is further configured to send third information to the terminal device, where the third information is used to indicate the resource number of the target uplink reference signal and the target downlink reference signal Resource ID.

Optionally, as an embodiment, the sending module is further configured to send fifth information to the terminal device, where the fifth information is used to configure the transmission resource of the target downlink reference signal.

Optionally, as an embodiment, the sending module is specifically configured to: use the third antenna weight vector to receive a first channel sent by the terminal device, where the first channel carries the first data signal and the the target downlink reference signal; and the fourth antenna weight vector is used to receive the second channel sent by the terminal device, where the second channel carries the second data signal and the target uplink reference signal.

In an optional embodiment, the foregoing apparatus 1000 may also be a network device, the sending module 1010 may be a transmitter, the receiving module 1020 may be a transmitter, and the foregoing processing module may be a processor.

In an optional embodiment, the apparatus 800 may be a communication apparatus 1100, the receiving module 810 and the sending module 820 may be a transceiver 1140, and the communication apparatus 1100 may further include an input/output interface 1130 and a memory 1110, as shown in Figure 11. Optionally, the communication apparatus may be a terminal device.

In an optional embodiment, the apparatus 900 may be a communication apparatus 1100, the sending module 910 and the receiving module 920 may be a transceiver 1140, and the communication apparatus 1100 may further include an input/output interface 1130 and a memory 1112, as shown in Figure 11. Optionally, the communication apparatus may be a terminal device.

In an optional embodiment, the apparatus 1000 may be a communication apparatus 1100, the sending module 1010 and the receiving module 1020 may be a transceiver 1140, and the network device 1100 may further include an input/output interface 1130 and a memory 1112, as shown in Figure 11. Optionally, the communication apparatus may be a network device.

FIG. 11 is a schematic block diagram of a communication apparatus according to another embodiment of the present application. The communication apparatus 1100 shown in FIG. 11 may include: a memory 1110 , a processor 1120 , an input/output interface 1130 , and a transceiver 1140 . The memory 1110, the processor 1120, the input/output interface 1130 and the transceiver 1140 are connected through an internal connection path, the memory 1110 is used to store instructions, and the processor 1120 is used to execute the instructions stored in the memory 1110 to control input/output The output interface 1130 receives input data and information, outputs data such as operation results, and controls the transceiver 1140 to send signals.

It should be understood that the transceiver 1140 is also called a communication interface, and uses a transceiver such as but not limited to a transceiver to implement communication between the terminal 1100 and other devices or a communication network.

The memory 1110 may include read only memory and random access memory, and provides instructions and data to the processor 1120 . A portion of the processor 1120 may also include non-volatile random access memory. For example, the processor 1120 may also store device type information.

In the implementation process, each step of the above-mentioned method can be completed by an integrated logic circuit of hardware in the processor 1120 or an instruction in the form of software. The methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory 1110, and the processor 1120 reads the information in the memory 1110, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.

It should be understood that in this embodiment of the present application, the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), application-specific integrated circuits ( application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

An embodiment of the present application further provides a communication system, where the communication system includes terminal equipment and network equipment, where the terminal equipment may be the apparatus 800 shown in FIG. 8 or the apparatus 900 shown in FIG. 9 above, and the network equipment may be the apparatus shown in FIG. Apparatus 1000 shown at 10. The terminal device can be used in cooperation with the network device to implement the method shown in FIG. 2 . For example, the terminal device uses the first antenna weight vector to receive the target downlink reference signal sent by the network device, and the target downlink reference signal is sent by the network device using the third antenna weight vector; the terminal device uses the second antenna The weight vector set sends a target uplink reference signal to the network device, and the target uplink reference signal is received by the network device with a fourth antenna weight vector; wherein the second antenna weight vector set is the same as the fourth antenna weight vector set. The magnitudes of the weights corresponding to the same antenna in an antenna weight vector are the same, and/or the second antenna weight vector set and the weights corresponding to the same antenna in the first antenna weight vector have the same phase.

It should be noted that the above-mentioned communication system can implement all the functions described in FIG. 2 , which are not repeated here for brevity.

It should be understood that the above-mentioned communication system may be the communication system 100 shown in FIG. 1 , or a modification of the communication system 100 .

It should also be understood that, in the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is only determined according to A, and B may also be determined according to A and/or other information.

It should be understood that the term "and/or" in this document is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

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

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 alone, or two or more units may be integrated into one unit.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in 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 instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server, a data center, etc. that includes one or more available media integrated. The available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, digital video discs (DVDs)), or semiconductor media (eg, solid state disks (SSDs)) )Wait.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (35)

1. A method of communication, comprising:

the terminal equipment receives a target downlink reference signal sent by the network equipment by adopting a first antenna weight vector;

the terminal equipment determines a second antenna weight vector set according to the corresponding relation among the first antenna weight vector, the receiving antenna of the target downlink reference signal and the transmitting antenna of the target uplink reference signal;

the terminal equipment sends the target uplink reference signal to the network equipment by adopting the second antenna weight vector set;

wherein, the ratio of the weight magnitude of the same antenna in the second antenna weight vector set and the first antenna weight vector is the same, and/or the weight phase of the same antenna in the second antenna weight vector set and the first antenna weight vector is the same.

2. The method of claim 1, wherein the determining, by the terminal device, the second antenna weight vector set according to the correspondence between the first antenna weight vector, the receiving antenna of the target downlink reference signal, and the transmitting antenna of the target uplink reference signal comprises:

the terminal equipment determines the antenna weight of each receiving antenna in the receiving antennas of the target downlink reference signal according to the first antenna weight vector;

and the terminal equipment determines the second antenna weight vector set according to the antenna weight of each receiving antenna in the receiving antennas of the target downlink reference signal and the corresponding relation between the transmitting antenna of the target uplink reference signal and the receiving antenna of the target downlink reference signal.

3. The method of claim 1 or 2, wherein the terminal device sends the target uplink reference signal to the network device according to the second set of antenna weight vectors, including:

the terminal device occupies at least one uplink transmission resource according to a second antenna weight vector set, and sends the target uplink reference signal to the network device, wherein the sending antenna sets of the target uplink reference signal corresponding to different antenna weight vectors in the second antenna weight vector set are different, and the sending antenna sets of the target uplink reference signal corresponding to different uplink transmission resources in the at least one uplink transmission resource are different.

4. The method of claim 1 or 2, wherein the second set of antenna weight vectors has a same weight magnitude ratio as a corresponding same antenna in the first antenna weight vector, the method further comprising:

and the terminal equipment sends first information to the network equipment, wherein the first information comprises phase information of the first antenna weight vector.

5. The method of claim 1 or 2, wherein the second set of antenna weight vectors is the same phase as a corresponding same antenna in the first set of antenna weight vectors, the method further comprising:

and the terminal equipment sends second information to the network equipment, wherein the second information comprises the amplitude information of the first antenna weight vector.

6. The method of claim 1 or 2, wherein the second set of antenna weight vectors comprises one second antenna weight vector,

the method further comprises the following steps:

and the terminal equipment determines a first antenna weight vector used by the target downlink reference signal and a receiving antenna of the target downlink reference signal according to the second antenna weight vector used by the target uplink reference signal and the transmitting antenna of the target uplink reference signal.

7. The method of claim 6, wherein the method further comprises:

and the terminal equipment receives third information from the network equipment, wherein the third information is used for indicating the resource number of the target uplink reference signal and the resource number of the target downlink reference signal.

8. A method of communication, comprising:

the network equipment sends a target downlink reference signal to the terminal equipment by adopting a third antenna weight vector;

the network equipment determines a fourth antenna weight vector according to the corresponding relation between the third antenna weight vector and the receiving antenna of the target downlink reference signal and the transmitting antenna of the target uplink reference signal;

the network device receives the target uplink reference signal sent by the terminal device by using the fourth antenna weight vector,

wherein, the antenna weight proportion of the third antenna weight vector and the fourth antenna weight vector corresponding to the same antenna is the same; the third antenna weight vector is used for indicating the antenna weight of the transmitting antenna of the target downlink reference signal, and the fourth antenna weight vector is used for indicating the antenna weight of the receiving antenna of the target uplink reference signal.

9. The method of claim 8, wherein the target uplink reference signal occupies at least one uplink transmission resource, and a transmit antenna set and an antenna weight vector of the target uplink reference signal corresponding to different uplink transmission resources in the at least one uplink transmission resource are different.

10. The method of claim 9, wherein the network device receiving the target uplink reference signal using the fourth antenna weights comprises:

the network device receives the target uplink reference signal on the at least one uplink transmission resource by using the fourth antenna weight;

the method further comprises the following steps:

and the network equipment combines the target uplink reference signals and detects the arrival time of the target uplink reference signals.

11. The method of claim 10, wherein the method further comprises:

the network device receives first information sent by a terminal device, wherein the first information comprises phase information of a first antenna weight vector, and the first antenna weight vector indicates an antenna weight of a receiving antenna of the target downlink reference signal.

12. The method of claim 11, wherein the network device combining the target uplink reference signals comprises:

and the network equipment determines a first weighting parameter according to the phase information and combines the target uplink reference signal according to the first weighting parameter.

13. The method of any of claims 8 to 12, further comprising:

and the network equipment receives second information sent by the terminal equipment, wherein the second information comprises amplitude information of a first antenna weight vector, and the first antenna weight vector indicates the antenna weight of a receiving antenna of the target downlink reference signal.

14. The method of any of claims 10 to 12, wherein the network device combining the target uplink reference signals comprises:

and the network equipment determines a second weighting parameter according to the amplitude information and combines the target uplink reference signal according to the second weighting parameter.

15. The method according to any of claims 8 to 12, wherein before the network device uses the third antenna weight vector to send the target downlink reference signal to the terminal device, the method further comprises:

the network equipment determines the target downlink reference signal corresponding to the target uplink reference signal according to the target uplink reference signal; or

And the network equipment determines the target uplink reference signal corresponding to the target downlink reference signal according to the target downlink reference signal.

16. The method of any of claims 8 to 12, further comprising:

and the network equipment sends third information to the terminal equipment, wherein the third information is used for indicating the resource number of the target uplink reference signal and the resource number of the target downlink reference signal.

17. A communications apparatus, comprising:

the receiving module is used for receiving a target downlink reference signal sent by the network equipment by adopting the first antenna weight vector;

a processing module, configured to determine a second antenna weight vector set according to the first antenna weight vector, a correspondence between a receiving antenna of the target downlink reference signal received by the receiving module and a transmitting antenna of the target uplink reference signal sent by the transmitting module;

the sending module is configured to send the target uplink reference signal to the network device by using the second antenna weight vector set;

wherein, the ratio of the weight magnitude of the same antenna in the second antenna weight vector set and the first antenna weight vector is the same, and/or the weight phase of the same antenna in the second antenna weight vector set and the first antenna weight vector is the same.

18. The apparatus of claim 17, wherein the processing module is specifically configured to:

and determining an antenna weight of each receiving antenna in the receiving antennas of the target downlink reference signal according to the first antenna weight vector, and determining a second antenna weight vector set according to the antenna weight of each receiving antenna in the receiving antennas of the target downlink reference signal and the corresponding relation between the transmitting antenna of the target uplink reference signal and the receiving antenna of the target downlink reference signal.

19. The apparatus of claim 17 or 18, wherein the sending module is specifically configured to:

and according to a second antenna weight vector set, occupying at least one uplink transmission resource, and sending the target uplink reference signal to the network equipment, wherein the sending antenna sets of the target uplink reference signal corresponding to different antenna weight vectors in the second antenna weight vector set are different, and the sending antenna sets of the target uplink reference signal corresponding to different uplink transmission resources in the at least one uplink transmission resource are different.

20. The apparatus of claim 17 or 18, wherein the sending module is further configured to: and when the weight magnitude proportion of the same antenna in the second antenna weight vector set and the first antenna weight vector is the same, sending first information to the network equipment, wherein the first information comprises phase information of the first antenna weight vector.

21. The apparatus of claim 17 or 18, wherein the sending module is further configured to send second information to the network device when the phase of the same antenna in the second set of antenna weight vectors is the same as the phase of the same antenna in the first set of antenna weight vectors, the second information including magnitude information of the first antenna weight vector.

22. The apparatus of claim 17 or 18, wherein the processing module is further configured to, when the second set of antenna weight vectors includes one second antenna weight vector, determine, according to the second antenna weight vector used by the target uplink reference signal and a transmitting antenna of the target uplink reference signal, a first antenna weight vector used by the target downlink reference signal and a receiving antenna of the target downlink reference signal.

23. The apparatus of claim 22, wherein the receiving module is further configured to receive third information from the network device, the third information indicating a resource number of the target uplink reference signal and the target downlink reference signal resource number.

24. A communications apparatus, comprising:

the transmitting module is used for transmitting a target downlink reference signal to the terminal equipment by adopting a third antenna weight vector;

a processing module, configured to determine a fourth antenna weight vector according to the third antenna weight vector and a corresponding relationship between a receiving antenna of the target downlink reference signal sent by the sending module and a sending antenna of the target uplink reference signal received by the receiving module;

the receiving module is configured to receive the target uplink reference signal sent by the sending module by using the fourth antenna weight vector, where a ratio of the third antenna weight vector to an antenna weight corresponding to the same antenna in the fourth antenna weight vector is the same, the third antenna weight vector is used to indicate an antenna weight of a sending antenna of the target downlink reference signal, and the fourth antenna weight vector is used to indicate an antenna weight of a receiving antenna of the target uplink reference signal.

25. The apparatus of claim 24, wherein the target uplink reference signal occupies at least one uplink transmission resource, and a transmit antenna set and an antenna weight vector of the target uplink reference signal corresponding to different uplink transmission resources in the at least one uplink transmission resource are different.

26. The apparatus of claim 25, wherein the receiving module is configured to receive the target uplink reference signal on the at least one uplink transmission resource using the fourth antenna weight;

the processing module is further configured to combine the target uplink reference signals and detect an arrival time of the target uplink reference signals.

27. The apparatus of claim 26, wherein the receiving module is configured to receive first information sent by a terminal device, the first information includes phase information of a first antenna weight vector, and the first antenna weight vector indicates antenna weights of receiving antennas of the target downlink reference signal.

28. The apparatus of claim 27, wherein the processing module is specifically configured to determine a first weighting parameter according to the phase information, and to combine the target uplink reference signals according to the first weighting parameter.

29. The apparatus according to any one of claims 24 to 28, wherein the receiving module is further configured to receive second information sent by a terminal device, where the second information includes magnitude information of a first antenna weight vector, and the first antenna weight vector indicates an antenna weight of a receiving antenna of the target downlink reference signal.

30. The apparatus of any one of claims 26 to 28, wherein a network device combining the target uplink reference signals comprises:

and the network equipment determines a second weighting parameter according to the amplitude information and combines the target uplink reference signal according to the second weighting parameter.

31. The apparatus according to any one of claims 24 to 28, wherein the processing module is further configured to determine the target downlink reference signal corresponding to the target uplink reference signal according to the target downlink reference signal; or determining the target uplink reference signal corresponding to the target downlink reference signal according to the target downlink reference signal.

32. The apparatus of any one of claims 24 to 28, wherein the sending module is further configured to send third information to the terminal device, where the third information is used to indicate a resource number of the target uplink reference signal and the target downlink reference signal resource number.

33. A computer-readable medium having program code stored thereon, which when run on a computer causes the computer to perform the method of any one of claims 1 to 7.

34. A computer-readable medium having program code stored thereon, which when run on a computer causes the computer to perform the method of any one of claims 8 to 16.

35. A communications device comprising a memory for storing a computer program and a processor for retrieving from the memory and executing the computer program to perform the method of any one of claims 1 to 7 or 8 to 16.

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