Uplink channel adjustment method, base station equipment and computer readable medium

Abstract

The present disclosure provides an uplink channel adjustment method for a base station device, the method comprising: receiving a first sounding reference signal (SRS) sent by a target terminal through a plurality of transmitting antennas to obtain a second SRS; determining the uplink channel attenuation of each transmitting antenna according to the first SRS and the second SRS; determining a target transmitting antenna from the transmitting antennas according to the uplink channel attenuation; and sending an uplink antenna selection instruction comprising the identifier of the target transmitting antenna to the target terminal. The invention further provides base station equipment and a computer readable medium.

Description

Technical Field

[0001] The present disclosure relates to the technical field of sounding reference signals, and in particular to an uplink channel adjustment method, a base station device, and a computer-readable medium. Background Art

[0002] The terminal may send a sounding reference signal (SRS) to the base station device, and the base station device then adjusts the uplink channel according to the received SRS.

[0003] However, the method for adjusting the uplink channel in the related art is computationally complex, has poor accuracy, and cannot effectively save resources. Summary of the invention

[0004] The present disclosure provides an uplink channel adjustment method, a base station device, and a computer-readable medium.

[0005] In a first aspect, an embodiment of the present disclosure provides a method for adjusting an uplink channel, for use in a base station device, the method comprising:

[0006] Receiving a first sounding reference signal SRS sent by a target terminal through multiple transmit antennas to obtain a second SRS;

[0007] Determine the uplink channel attenuation of each of the transmitting antennas according to the first SRS and the second SRS;

[0008] Determine a target transmitting antenna from the transmitting antennas according to the uplink channel attenuation;

[0009] An uplink antenna selection instruction including an identifier of the target transmitting antenna is sent to the target terminal.

[0010] In a second aspect, an embodiment of the present disclosure provides a base station device, which includes a memory and a processor; the memory stores a computer program that can be executed by the processor, and when the computer program is executed by the processor, it implements any uplink channel adjustment method of the embodiment of the present disclosure.

[0011] In a third aspect, an embodiment of the present disclosure provides a computer-readable medium having a computer program stored thereon, and when the computer program is executed by a processor, the computer program implements any one of the uplink channel adjustment methods of the embodiments of the present disclosure.

[0012] In the embodiment of the present disclosure, the base station device determines the attenuation coefficient (uplink channel attenuation) of the uplink channel of each transmitting antenna of the target terminal according to the difference between the received SRS (second SRS) and the SRS (first SRS) sent by the target terminal, and controls the target terminal to use the transmitting antenna with small attenuation (target transmitting antenna) to send uplink data; wherein, the operation for determining the uplink channel attenuation is simple, low in consumption, and easy to implement; at the same time, the smaller the attenuation of the transmitting antenna, the smaller the path loss, that is, the power of the signal actually reaching the base station device is higher when the transmitting source power of the target end is the same. Therefore, the method of selecting the target transmitting antenna according to the uplink channel attenuation in the embodiment of the present disclosure can effectively optimize the transmit power (such as NR transmit power) of the target terminal, so that the base station device can allocate resources more accurately, save resources, and improve throughput. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In the accompanying drawings of the embodiments of the present disclosure:

[0014] Figure 1 A flowchart of a method for adjusting an uplink channel provided by an embodiment of the present disclosure;

[0015] Figure 2 A flowchart of another uplink channel adjustment method provided by an embodiment of the present disclosure;

[0016] Figure 3 A block diagram of a base station device provided in an embodiment of the present disclosure;

[0017] Figure 4 A block diagram of a computer-readable medium provided for an embodiment of the present disclosure;

[0018] Figure 5 A schematic diagram of the relationship between the RF front-end circuit and the transmitting antenna of the terminal;

[0019] Figure 6 It is a corresponding relationship diagram between the signal transmitted between the target terminal and the base station device and the element h of the channel matrix. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the uplink channel adjustment method, base station device, and computer-readable medium provided by the embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings.

[0021] The present disclosure will be described more fully below with reference to the accompanying drawings, but the embodiments shown may be embodied in different forms, and the present disclosure should not be construed as being limited to the embodiments set forth below. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete, and will enable those skilled in the art to fully understand the scope of the present disclosure.

[0022] The accompanying drawings of the embodiments of the present disclosure are used to provide a further understanding of the embodiments of the present disclosure, and constitute a part of the specification, and are used together with the detailed embodiments to explain the present disclosure, and do not constitute a limitation of the present disclosure. By describing the detailed embodiments with reference to the accompanying drawings, the above and other features and advantages will become more apparent to those skilled in the art.

[0023] The present disclosure may be described with reference to plan views and / or cross-sectional views by means of ideal schematic views of the present disclosure. Therefore, the exemplary illustrations may be modified according to manufacturing techniques and / or tolerances.

[0024] In the absence of conflict, the various embodiments of the present disclosure and the various features therein may be combined with each other.

[0025] The terms used in the present disclosure are only used to describe specific embodiments and are not intended to limit the present disclosure. The term "and / or" as used in the present disclosure includes any and all combinations of one or more related enumerated items. The singular forms "one" and "the" as used in the present disclosure are also intended to include plural forms, unless the context clearly indicates otherwise. The terms "including", "made of..." as used in the present disclosure specify the presence of the features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof.

[0026] Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure have the same meaning as commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning unless explicitly defined in this disclosure.

[0027] The present disclosure is not limited to the embodiments shown in the drawings, but includes modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the drawings illustrate the specific shapes of the regions of the elements, but are not intended to be limiting.

[0028] The base station equipment can determine the terminal location and channel quality based on the sounding reference signal (SRS) sent by the terminal, and then perform beamforming, resource allocation, etc.

[0029] For a terminal with a multiple-input multiple-output (MIMO) antenna, it can send SRS in a polling manner through multiple transmit (Tx) antennas, and the more transmit antennas involved in the transmission, the more accurate the detection performed by the base station device based on the SRS.

[0030] For example, refer to Figure 5 In the RF front-end circuit of the 5G (fifth generation mobile communication technology) terminal, a switch (such as a single-pole double-throw SPDT switch) is provided in front of the receiving port of each transmitting antenna, so as to control the generated SRS to enter the receiving port of the selected transmitting antenna and be transmitted.

[0031] In the SRS technology, the solution for base station equipment to adjust the downlink channel according to the SRS is relatively mature, but the solution for adjusting the uplink channel according to the SRS still has many problems.

[0032] For example, in some related technologies, the base station equipment determines the downlink channel quality based on the SRS and adjusts the uplink channel based on the downlink channel quality; however, the downlink channel quality cannot actually accurately reflect the uplink channel situation, so this method has poor accuracy and cannot effectively optimize the uplink channel.

[0033] For example, in some other related technologies, the base station equipment performs secondary analysis on the received SRS and finally calculates the uplink channel quality through multiple intermediate variables. However, this method is computationally complex, consumes a lot of resources, is difficult to apply in practice, and also cannot guarantee accuracy.

[0034] In a first aspect, an embodiment of the present disclosure provides a method for adjusting an uplink channel, which is used in a base station device.

[0035] A target terminal (such as a mobile phone) with multiple transmit antennas (such as a MIMO antenna) can send SRS to the base station device in a polling manner through multiple transmit antennas, and the base station device can determine the terminal location, channel quality, etc. based on the SRS, and then make channel adjustments.

[0036] The method of the embodiment of the present disclosure is executed by a base station device (such as a communication base station) and is used to control the target terminal to adjust the uplink channel according to the SRS.

[0037] Reference Figure 1 , the uplink channel adjustment method of the embodiment of the present disclosure includes:

[0038] S101. Receive a first SRS sent by a target terminal through multiple transmit antennas to obtain a second SRS.

[0039] S102: Determine the uplink channel attenuation of each transmitting antenna according to the first SRS and the second SRS.

[0040] S103: Determine a target transmitting antenna from transmitting antennas according to uplink channel attenuation.

[0041] S104: Send an uplink antenna selection instruction including an identifier of a target transmitting antenna to a target terminal.

[0042] In the disclosed embodiment, the target terminal (such as a mobile phone) has multiple transmitting antennas (such as a MIMO antenna), which sends a predetermined SRS to a base station device (such as a communication base station) when needed, wherein the signal actually sent by the target terminal (transmitting signal) is the first SRS; and since the first SRS is subject to refraction, reflection, scattering, loss, phase shift, interference, etc. during transmission, the signal actually received by the base station device (received signal) is the second SRS, and the second SRS is different from the first SRS.

[0043] The relationship between the first SRS and the second SRS reflects the uplink channel between the target terminal and the base station device. Therefore, the base station device can determine the attenuation of the uplink channel of each transmitting antenna (uplink channel attenuation) based on the second SRS actually received and the first SRS actually sent by the target terminal (the first SRS is predetermined and therefore known to the base station device), thereby selecting the transmitting antenna with the smallest uplink channel attenuation as the target transmitting antenna and sending an uplink antenna selection instruction to the target terminal.

[0044] After receiving the uplink antenna selection instruction, the target terminal may determine the target transmitting antenna according to the identifier of the target transmitting antenna (such as the number of the target transmitting antenna), and switch to use the target transmitting antenna to send uplink signals.

[0045] For example, the target terminal can load the driving parameters of the target transmitting antenna (i.e., the optimal uplink channel) (the driving parameters include the driving module configuration for the target transmitting antenna, such as port selection, state switching, working parameters, etc. of related devices), turn on the switch corresponding to the target transmitting antenna, and thus send the uplink signal through the target transmitting antenna.

[0046] Among them, in the target terminal with multiple transmitting antennas, its RF front-end circuit can usually be connected to different transmitting antennas through a switch, that is, the switching of the transmitting antenna is realized; therefore, the embodiment of the present disclosure can make full use of the RF front-end circuit design in the mature terminal to achieve improved transmission performance.

[0047] In the embodiment of the present disclosure, the base station device determines the attenuation coefficient (uplink channel attenuation) of the uplink channel of each transmitting antenna of the target terminal according to the difference between the received SRS (second SRS) and the SRS (first SRS) sent by the target terminal, and controls the target terminal to use the transmitting antenna with small attenuation (target transmitting antenna) to send uplink data; wherein, the operation for determining the uplink channel attenuation is simple, low in consumption, and easy to implement; at the same time, the smaller the attenuation of the transmitting antenna, the smaller the path loss, that is, the power of the signal actually reaching the base station device is higher when the transmitting source power of the target end is the same. Therefore, the method of selecting the target transmitting antenna according to the uplink channel attenuation in the embodiment of the present disclosure can effectively optimize the transmit power (such as NR transmit power) of the target terminal, so that the base station device can allocate resources more accurately, save resources, and improve throughput.

[0048] In some embodiments, determining the uplink channel attenuation of each transmitting antenna according to the first SRS and the second SRS (S102) includes:

[0049] S102A: In response to the uplink quality of the target terminal being lower than a preset quality threshold, determine the uplink channel attenuation of each transmitting antenna according to the first SRS and the second SRS.

[0050] In some embodiments, the uplink quality includes an uplink signal-to-noise ratio (SINR).

[0051] As one embodiment of the present disclosure, refer to Figure 2 The base station equipment can monitor the uplink quality that can represent the current uplink channel condition of the target terminal, such as the uplink SINR; and only calculate the uplink channel attenuation and subsequent steps when the uplink quality is lower than a pre-set quality threshold (such as set based on experience).

[0052] When the uplink quality (such as uplink SINR) is lower than the quality threshold, it usually indicates that the current uplink channel condition of the target terminal is already poor, so it is more necessary to adjust the uplink channel, and the improvement of the uplink channel after adjustment is usually more obvious.

[0053] It should be understood that it is also feasible to adjust the uplink channel in other situations (such as periodically, or when the decrease of the uplink quality relative to the initial value exceeds a predetermined ratio).

[0054] It should be understood that it is also feasible to use other parameters other than uplink SINR that can characterize the uplink channel conditions as uplink quality. For example, uplink received signal strength indication (RSSI, Received Signa l StrengthI nd icat ion), uplink reference signal received power (RSRP, Reference Signa l Receiving Power), etc. can be used as uplink quality.

[0055] In some embodiments, reference Figure 2 , determining a target transmitting antenna from the transmitting antennas according to the uplink channel attenuation (S103) includes:

[0056] S1031. Determine a transmitting antenna with the smallest uplink channel attenuation as a target transmitting antenna.

[0057] As one embodiment of the present disclosure, refer to Figure 2 , the one with the smallest uplink channel attenuation can be directly selected from all the transmitting antennas as the target transmitting antenna; among them, the smallest uplink channel attenuation means the smallest path loss, so the improvement of the target terminal transmission power is also the most obvious.

[0058] It should be understood that the target transmitting antenna may be selected in other ways, for example, by taking the weighted combination of uplink channel attenuation and other parameters as the basis for selecting the target transmitting antenna.

[0059] In some embodiments, reference Figure 2 , determining the uplink channel attenuation of each transmitting antenna according to the first SRS and the second SRS (S102) includes:

[0060] S1021. Determine a channel matrix through channel estimation according to the first SRS and the second SRS.

[0061] S1022. Determine a transmission channel vector for each transmitting antenna according to the channel matrix.

[0062] The transmission channel vector of each transmitting antenna includes the elements corresponding to the transmitting antenna in all channel matrices.

[0063] S1023: Calculate the modulus of the transmission channel vector as the uplink channel attenuation of the transmitting antenna.

[0064] Among them, the channel matrix is ​​a matrix of "number of receiving antennas * number of transmitting antennas", in which each element reflects the connection status between a transmitting antenna and a receiving antenna (such as transmission probability). Therefore, it can be considered that the first SRS is transformed into the second SRS through the action of the channel matrix, that is, "second SRS = channel matrix * first SRS".

[0065] Channel estimation is the process of finding corresponding channel parameters according to actual transmitted and received signals in accordance with a certain channel model; in the disclosed embodiment, channel estimation is the process of finding the channel matrix through matrix inversion operation based on the first SRS and the second SRS.

[0066] As one embodiment of the present disclosure, refer to Figure 2 The specific process of calculating the uplink channel attenuation may be to first perform channel estimation (matrix inverse operation) on the first SRS and the second SRS to calculate the channel matrix; and for each transmitting antenna, all the elements corresponding to it are selected from the channel matrix to form a transmission channel vector; then, the modulus of each transmission channel vector (the squares of all elements of the transmission channel vector are added together and then the square root is taken) is calculated as the uplink channel attenuation of the corresponding transmitting antenna.

[0067] Among them, "channel estimation" can specifically adopt a variety of known algorithms, which is easy to implement, and the operation of "finding the modulus of the vector" is also very simple, and using the modulus of the transmission channel vector as the uplink channel attenuation can accurately reflect the actual attenuation of the uplink channel; therefore, the above method has a small amount of calculation and high accuracy.

[0068] In some embodiments, the channel estimation includes at least one of the following: least squares channel estimation, minimum mean square error channel estimation, linear minimum mean square error channel estimation.

[0069] As a method of an embodiment of the present disclosure, the specific channel estimation algorithm for parsing the channel matrix may be least squares (LS), minimum mean square error (MMSE), linear minimum mean square error (LMMSE), etc.

[0070] Among them, LS is a method of solving the channel matrix based on the criterion of minimizing the sum of squares of differences between the calculated channel parameters and the actual channel parameters. It is equal to dividing the second SRS by the first SRS (i.e., the inverse operation of the first SRS) to obtain the channel matrix, so it has low complexity and small amount of calculation.

[0071] MMSE is an improvement on LS. It multiplies the result obtained by LS by a weighting matrix to use it as the channel matrix, so it can better reflect the actual situation of the channel.

[0072] LMMSE is a simplification of MMSE. It performs linear smoothing on MMSE, thereby reducing the computational complexity.

[0073] It should be understood that the specific algorithm for channel estimation is not limited thereto, and other known algorithms may also be used for channel estimation in the embodiments of the present disclosure.

[0074] In some embodiments, determining a channel matrix by channel estimation according to the first SRS and the second SRS (S1022) includes:

[0075] S1022A. Determine H according to the formula Y=H*X.

[0076] The first SRS includes a t*1 dimensional matrix X, the second SRS includes an r*1 dimensional matrix Y, the channel matrix includes an r*t dimensional matrix H, t is the number of transmitting antennas, and r is the number of receiving antennas used by the base station device to receive the first SRS.

[0077] Determining the transmission channel vector of each transmitting antenna according to the channel matrix (S1023) includes:

[0078] S1023A. Add a column of elements corresponding to each transmitting antenna in H to the transmission channel vector of the transmitting antenna.

[0079] As a specific embodiment of the present disclosure, refer to Figure 6 , when the first SRS is sent by the target terminal through t (t is an integer greater than or equal to 2) transmitting antennas, the signal (symbol) sent by the i-th transmitting antenna is xi, so the first SRS sent by all transmitting antennas can be represented by a t*1-dimensional (i.e., t rows and 1 columns) matrix (which can also be regarded as an array) X, that is:

[0080] X=(x1,x2,…,xt);

[0081] Among them, the element of the i-th row of X (that is, the i-th element of the array) is the xi of the i-th transmitting antenna.

[0082] Reference Figure 6 , the base station equipment receives the second SRS through r (r is a natural number) receiving antennas, where the signal (symbol) received by the i-th receiving antenna is yi, so the second SRS received by all receiving antennas can be represented by a matrix (also considered as an array) Y of r*1 dimensions (i.e., r rows and 1 columns), that is:

[0083] Y=(y1,y2,…,yr);

[0084] Among them, the element of the i-th row of Y (that is, the i-th element of the array) is the yi of the i-th receiving antenna.

[0085] Correspondingly, the channel matrix can be represented by a matrix H of r*t dimensions (i.e., r rows and t columns), namely:

[0086] H=[(h11, h12, ..., h1t), (h21, h22, ..., h2t), ..., (hr1, hr2, ..., hrt)];

[0087] Among them, all elements of the i-th row of H (i.e., the i-th element of the array) correspond to the i-th receiving antenna, and all elements of the i-th column correspond to the i-th transmitting antenna, that is, refer to Figure 6 , the element hij in the i-th row and j-th column of H represents the relationship between the i-th receiving antenna and the j-th transmitting antenna.

[0088] Therefore, Y, H, and X satisfy the formula:

[0089] Y = H * X;

[0090] That is, we have:

[0091] yi=hi1*x1+hi2*x2+…+hit*xt;

[0092] Since Y and X are known, H can be obtained through matrix inversion operation.

[0093] Furthermore, in each H, refer to Figure 6 , all elements in the i-th column correspond to the i-th transmitting antenna, so the sequence of all elements in the i-th column (h1i, h2i, …, hri) can be added to the transmission channel vector Hi() of the i-th transmitting antenna.

[0094] Afterwards, Hi() can be modulo and ||Hi()|| can be used as the uplink channel attenuation αi of the i-th transmitting antenna.

[0095] Afterwards, the smallest α can be selected from α1, α2, ..., αt, and the corresponding transmitting antenna is used as the target transmitting antenna.

[0096] In some embodiments, the first SRS and the second SRS are respectively mapped to multiple frequency domains f; the first SRS includes a t*1-dimensional matrix Xf at each f, the second SRS includes an r*1-dimensional matrix Yf at each f, and the channel matrix includes an r*t-dimensional matrix Hf at each f.

[0097] Determining a channel matrix by channel estimation according to the first SRS and the second SRS (S1022) includes:

[0098] S1022B, determine Hf at each f according to the formula Yf=Hf*Xf.

[0099] Determining the transmission channel vector of each transmitting antenna according to the channel matrix (S1023) includes:

[0100] S1023B. Add a column of elements corresponding to each transmitting antenna in each Hf to the transmission channel vector of the transmitting antenna.

[0101] As one way of an embodiment of the present disclosure, in modes such as Orthogonal Frequency Division Multiplexing (OFDM), SRS can be sent in multiple different frequency domains f respectively; wherein there is a corresponding channel matrix Hf in each frequency domain f, and each element (x) in the matrix Xf of the first SRS in each frequency domain f is a symbol mapped by the first SRS in the frequency domain, and each element (y) in the matrix Yf of the second SRS is a symbol mapped by the second SRS in the frequency domain.

[0102] And in each frequency domain f, it satisfies:

[0103] Yf=Hf*Xf.

[0104] Therefore, assuming that there are n frequency domains in total, the channel matrices in different frequency domains can be calculated respectively, namely Hf1, Hf2, ..., Hf n .

[0105] And in the i-th frequency domain f i The channel matrix Hf under i In the example, the sequence of the elements corresponding to the jth transmitting antenna is (hf i 1j, hf i 2j,…,hf i rj), which requires the addition of the transmission channel vector Hj() of the jth transmitting antenna.

[0106] The transmission channel vector Hj() of the jth transmitting antenna should include the elements related to it in Hf of all frequency domains f1, f1, ..., fn, that is:

[0107] Hj()=[(hf11j,hf12j,…,hf1rj),(hf21j,hf22j,…,hf2rj),…,(hf n 1j, hf n 2j,…,hf n rj)].

[0108] Therefore, after Hj() is obtained, it can be modulo, and the obtained ||Hj()|| is used as the uplink channel attenuation αj of the j-th transmitting antenna.

[0109] Second, refer to Figure 3 An embodiment of the present disclosure provides a base station device, which includes a memory and a processor; the memory stores a computer program that can be executed by the processor, and when the computer program is executed by the processor, any uplink channel adjustment method of the embodiment of the present disclosure is implemented.

[0110] Thirdly, refer to Figure 4An embodiment of the present disclosure provides a computer-readable medium on which a computer program is stored. When the computer program is executed by a processor, any uplink channel adjustment method of the embodiment of the present disclosure is implemented.

[0111] Among them, the processor is a device with data processing capabilities, including but not limited to the central processing unit (CPU); the memory is a device with data storage capabilities, including but not limited to random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory (FLASH); the I / O interface (read-write interface) is connected between the processor and the memory, and can realize information exchange between the memory and the processor, including but not limited to the data bus (Bus), etc.

[0112] Those skilled in the art will appreciate that all or some of the steps, systems, and functional modules / units in the apparatus disclosed above may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0113] In hardware implementations, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation.

[0114] Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit (CPU), a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-temporary medium) and a communication medium (or temporary medium). As known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory (FLASH) or other disk storage; read-only compact disk (CD-ROM), digital versatile disk (DVD) or other optical disk storage; magnetic cassettes, magnetic tapes, disk storage or other magnetic storage; any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0115] The present disclosure has disclosed example embodiments, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for limiting purposes. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly stated, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, those skilled in the art will appreciate that various changes in form and detail may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A method for adjusting an uplink channel, used in a base station device, wherein: The method comprises: Receiving a first sounding reference signal SRS sent by a target terminal through multiple transmit antennas to obtain a second SRS; Determine the uplink channel attenuation of each of the transmitting antennas according to the first SRS and the second SRS; Determine a target transmitting antenna from the transmitting antennas according to the uplink channel attenuation; An uplink antenna selection instruction including an identifier of the target transmitting antenna is sent to the target terminal.

2. The method according to claim 1, wherein: The determining the uplink channel attenuation of each transmitting antenna according to the first SRS and the second SRS includes: Determine a channel matrix through channel estimation according to the first SRS and the second SRS; Determine a transmission channel vector of each of the transmitting antennas according to the channel matrix; the transmission channel vector of each transmitting antenna includes all elements corresponding to the transmitting antenna in the channel matrix; The modulus of the transmission channel vector is calculated as the uplink channel attenuation of the transmitting antenna.

3. The method according to claim 2, wherein: Determining the channel matrix by channel estimation according to the first SRS and the second SRS includes: determining H according to the formula Y=H*X; wherein the first SRS includes a t*1-dimensional matrix X, the second SRS includes an r*1-dimensional matrix Y, the channel matrix includes an r*t-dimensional matrix H, t is the number of the transmitting antennas, and r is the number of the receiving antennas used by the base station device to receive the first SRS; Determining the transmission channel vector of each transmitting antenna according to the channel matrix includes: adding a column of elements in H corresponding to each transmitting antenna to the transmission channel vector of the transmitting antenna.

4. The method according to claim 3, wherein: The first SRS and the second SRS are respectively mapped to multiple frequency domains f; the first SRS includes a t*1-dimensional matrix Xf at each f, the second SRS includes an r*1-dimensional matrix Yf at each f, and the channel matrix includes an r*t-dimensional matrix Hf at each f; Determining the channel matrix by channel estimation according to the first SRS and the second SRS comprises: determining Hf according to the formula Yf=Hf*Xf at each of the f respectively; Determining the transmission channel vector of each transmitting antenna according to the channel matrix includes: adding a column of elements corresponding to each transmitting antenna in each Hf to the transmission channel vector of the transmitting antenna.

5. The method according to claim 2, wherein: The channel estimation includes at least one of the following: Least squares channel estimation, minimum mean square error channel estimation, linear minimum mean square error channel estimation.

6. The method according to claim 1, wherein: The determining the uplink channel attenuation of each transmitting antenna according to the first SRS and the second SRS includes: In response to the uplink quality of the target terminal being lower than a preset quality threshold, the uplink channel attenuation of each of the transmitting antennas is determined according to the first SRS and the second SRS.

7. The method according to claim 6, wherein: The uplink quality includes an uplink signal-to-noise ratio.

8. The method according to claim 1, wherein: The determining a target transmitting antenna from the transmitting antennas according to the uplink channel attenuation comprises: The transmitting antenna with the smallest uplink channel attenuation is determined as the target transmitting antenna.

9. A base station device, comprising a memory and a processor; the memory stores a computer program that can be executed by the processor, and when the computer program is executed by the processor, the method for uplink channel adjustment described in any one of claims 1 to 8 is implemented.

10. A computer-readable medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the uplink channel adjustment method according to any one of claims 1 to 8.

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