Information transmission method, electronic equipment and storage medium

Abstract

The embodiment of the invention provides an information transmission method, electronic equipment and a storage medium, and the method comprises the steps: receiving a reference signal for channel measurement; determining a preprocessing mode of the reference signal, and preprocessing the reference signal according to the preprocessing mode; and performing channel estimation according to the preprocessed reference signal, and feeding back channel quantization indication information to a configuration end. According to the embodiment of the invention, the channel state information can be obtained, the pilot frequency overhead is compressed, the accuracy of channel information estimation is improved, the matching degree of the channel state information and the base station antenna array dimension is improved, and the communication quality can be improved.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to an information transmission method, an electronic device, and a storage medium. Background Art

[0002] Multiple-antenna technology is a key physical layer technology in 4G wireless communication systems, namely Multiple Input Multiple Output (MIMO). By using an antenna array to transmit and receive wireless signals, the resource utilization efficiency in the spatial dimension can be significantly improved, thereby enhancing the capacity of the wireless communication system. Entering the 5G communication era, the scale of the antenna array has further increased, that is, massive MIMO. For example, it increases from 64 antennas to 192 antennas, and even can increase to 1024 antennas in the high-frequency band. In future wireless communication systems, the number of antennas on the base station side may further increase. To fully utilize the performance of the MIMO array, it is necessary to estimate the channel between the base station and the terminal using a reference signal or a pilot, and determine the optimal array precoding for the transmission of array signals according to the channel estimation result. The larger the scale of the antenna array, the greater the pilot overhead. Generally speaking, to accurately estimate the channel information, the required pilot signal is proportional to the number of antennas. For example, the number of non-precoded pilot signals is generally the same as the number of antenna ports, and the number of orthogonal beams corresponding to the precoded pilot generally also needs to be the same as the number of antenna ports. Therefore, when the array scale reaches a certain level, the time-frequency overhead required to send the pilot signal may offset the signal gain (spatial multiplexing gain) brought by the large-scale array, which will restrict the further increase of the antenna array scale. How to compress the number of pilot signals without affecting the accuracy of channel estimation is a key issue that future wireless communication technologies need to focus on.

[0003] The current 5G physical layer standard protocol defines some entities related to the utilization of spatial domain resources, such as antenna ports, resources, resource sets, beams, transceiver nodes, antenna panels, etc., which have different levels of abstraction. Based on this, the protocol also implicitly defines some transmission strategies for reference signals and stipulates the corresponding channel information measurement and feedback methods. In practical applications, the 5G protocol does not limit how the entities send measurement reference signals, giving room for flexible operation on the network side. For example, in some scenarios, a wireless base station can obtain some prior environmental information. According to this prior information, the base station can selectively send a part of the pilot signals to reduce the pilot overhead. In theory, the terminal can preprocess the received pilot signals according to the dimensions of the base station antennas to obtain channel information that matches the dimensions of the base station side array. However, the existing communication standards do not support the corresponding configuration process. The terminal does not know on which type of entity the base station side transmits the reference signals. Therefore, after receiving the reference signals, it generally defaults to obtaining a set of complete non-precoded pilot signals or a set of complete orthogonal precoded pilot signals, and the channel information estimated based on this has a large error and does not match the dimensions of the base station side antenna array. Therefore, a new configuration method needs to be considered to support channel estimation and feedback under the condition of on-demand pilot transmission. Summary of the Invention

[0004] Embodiments of the present application aim to provide an information transmission method, an electronic device, and a storage medium to achieve the acquisition of channel state information, compress the pilot overhead, improve the accuracy of channel information estimation, improve the matching degree between the channel state information and the dimensions of the base station antenna array, and improve the communication quality.

[0005] Embodiments of the present application provide an information transmission method, which is applied to a feedback end. The method includes:

[0006] Receiving a reference signal for channel measurement;

[0007] Determining a preprocessing method for the reference signal, and preprocessing the reference signal according to the preprocessing method;

[0008] Performing channel estimation based on the preprocessed reference signal, and feeding back channel quantization indication information to a configuration end.

[0009] Embodiments of the present application also provide an information transmission method, which is applied to a configuration end. The method includes:

[0010] Sending reception method configuration information to a feedback end;

[0011] Selecting a subset of reference signals for transmission from a set of reference signals;

[0012] Mapping the subset of reference signals to time-frequency domain resources, and transmitting the reference signals in the subset of reference signals;

[0013] Obtain the channel quantization indication information fed back by the feedback end.

[0014] An embodiment of the present application provides an electronic device, where the electronic device includes:

[0015] One or more processors;

[0016] A memory for storing one or more programs;

[0017] When the one or more programs are executed by the one or more processors, the one or more processors implement any method described in the embodiments of the present application.

[0018] An embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores one or more programs, and the one or more programs are executed by one or more processors to implement any method described in the embodiments of the present application. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a flowchart of an information transmission method provided by an embodiment of the present application;

[0021] Figure 2 It is a flowchart of another information transmission method provided by an embodiment of the present application;

[0022] Figure 3 It is an example diagram of an information transmission method provided by an embodiment of the present application;

[0023] Figure 4 It is an example diagram of inserting a fixed value into a measurement vector provided by an embodiment of the present application;

[0024] Figure 5 It is an example diagram of interpolating a measurement vector based on an interpolation algorithm provided by an embodiment of the present application;

[0025] Figure 6 It is an example diagram of setting elements of a measurement vector to zero provided by an embodiment of the present application;

[0026] Figure 7 It is an example diagram of another measurement vector interpolation replacement provided by an embodiment of the present application;

[0027] Figure 8 FIG. 1 is a schematic structural diagram of an information transmission device provided by an embodiment of the present application;

[0028] Figure 9 FIG. 2 is a schematic structural diagram of another information transmission device provided by an embodiment of the present application;

[0029] Figure 10 FIG. 3 is a schematic structural diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] It should be understood that the specific embodiments described herein are only for explaining the present application and are used to limit the present application.

[0031] In the following description, suffixes such as "module", "component" or "unit" used to represent elements are only for the convenience of description of the present application and have no specific meaning in themselves. Therefore, "module", "component" or "unit" can be used interchangeably.

[0032] Figure 1 FIG. 4 is a flowchart of an information transmission method provided by an embodiment of the present application. The embodiment of the present application is applicable to the case of channel state information estimation configuration in the case of a large-scale array antenna. This method can be executed by an information transmission device, and this device can be implemented by software and / or hardware methods and is generally integrated at the feedback end. For example, the feedback end can include a mobile terminal, an Internet of Things device terminal, a vehicle-mounted terminal, etc. Refer to Figure 1 , the method provided by the embodiment of the present application specifically includes the following steps:

[0033] Step 110, receive a reference signal for channel measurement.

[0034] Among them, the reference signal can be a signal for channel measurement, and the reference signal can have various types. For example, the reference signal can include a non-precoded reference signal, a precoded reference signal, etc.

[0035] In the embodiment of the present application, the feedback end can receive a reference signal for channel measurement, and the reception of this reference signal can include that the feedback end can listen on and receive the reference signal on a specified channel according to the channel estimation configuration information and synchronization information.

[0036] Generally, the process of the feedback end receiving the reference signal can be written in the following form,

[0037] y = Hs + n (1)

[0038] Among them, y is the measurement vector received by the feedback end, H is the channel matrix, s is the subset of reference signals transmitted by the configuration end, and n is the noise vector. Here, s can be a non-precoded reference signal, a precoded reference signal, or other reference signals that can be used for channel measurement or beam training. It can be found that the dimension of the measurement vector y is determined by the dimension of the reference signal s, and the measurement vector y contains information about the channel H. Therefore, the channel information can be estimated using the received measurement vector and fed back to the configuration end.

[0039] Step 120: Determine the preprocessing method of the reference signal, and preprocess the reference signal according to the preprocessing method.

[0040] Specifically, the feedback end can determine the preprocessing method of the reference signal and preprocess the reference signal according to the determined preprocessing method. It can be understood that the preprocessing method can include modifying at least one measurement result of the measurement vector of the signal, increasing the dimension of the measurement vector of the reference signal, etc.

[0041] On the one hand, since the feedback end is easily affected by noise and interference signals during the reception of the reference signal, it is necessary to adjust the received measurement value of the reference signal to reduce the influence of noise and interference signals on the measurement result. On the other hand, H in formula (1) is the channel matrix after port mapping, and its dimension can be smaller than the dimension of the channel between the configuration end array and the reflection end array. Therefore, it is necessary to complement the missing information through the preprocessing of the feedback end to achieve the dimension matching between the measurement vector and the actual channel.

[0042] Step 130: Perform channel estimation based on the preprocessed reference signal, and feed back channel quantization indication information to the configuration end.

[0043] In the embodiment of the present application, the feedback end can perform channel estimation using the preprocessed reference signal and feed back channel quantization indication information to the configuration end. It can be understood that the channel quantization indication information can include, but is not limited to, precoding information, beam selection information, information on the number of transmission layers or channel rank, measurement reference signal selection information, beam quality information, measurement reference signal resource or port selection information.

[0044] In some embodiments of the application, the reference signal includes at least one of the following: channel state information reference signal or synchronization signal.

[0045] In the embodiment of the present application, the feedback end can receive the channel state information reference signal or synchronization information for channel measurement.

[0046] In the above embodiments of the application, determining the preprocessing method of the reference signal includes at least one of the following:

[0047] Determine the preprocessing method according to the received reception mode configuration information;

[0048] Determine the preprocessing method according to a pre-agreement.

[0049] Specifically, the preprocessing method of the feedback end for the reference signal includes determining according to the received reception mode configuration information and the pre-agreed preprocessing method, etc. Among them, the reception mode configuration information can be sent by the configuration end.

[0050] In some application embodiments, preprocess the reference signal according to the preprocessing method, including at least one of the following:

[0051] Modify at least one measurement result of the measurement vector of the reference signal;

[0052] Interpolate at a preset interpolation position of the measurement vector of the reference signal.

[0053] Among them, the measurement vector can be composed of the measurement results of multiple reference signals, and each element of the measurement vector can correspond to a measurement value of a reference signal.

[0054] In the embodiments of the present application, the preprocessing of the reference signal may include processing the measurement vectors corresponding to the respective reference signals, modifying one or more measurement results in the measurement vector, or interpolating at a preset interpolation position of the measurement vector. It can be understood that interpolating at the preset interpolation position may include inserting a fixed value into the preset interpolation position of the measurement vector, or an interpolation algorithm and the measurement vector determine a preset value to be inserted into the preset interpolation position of the measurement vector.

[0055] In some application embodiments, modifying at least one measurement result of the measurement vector of the reference signal includes:

[0056] Determine the index set of the reference signal to be modified;

[0057] Select a preset value from the preset value set to replace the measurement value of the reference signal corresponding to the index set.

[0058] Among them, the index set can be a set composed of the indexes of the reference signals to be modified, the preset value set can be a set composed of at least one preset value, and the preset values in the preset value set can be configured according to service requirements.

[0059] In the embodiments of the present application, the indexes of the reference signals to be modified can be determined to form an index set, and some or all of the preset values can be selected from the preset value set to replace the measurement values in the measurement vector corresponding to the index set, so as to realize the modification of the measurement results of the measurement vector.

[0060] In other application embodiments, modifying at least one measurement result of the measurement vector of the reference signal includes:

[0061] Determine the index set of the reference signal to be modified;

[0062] Determine the measurement value adjustment amount according to the adjacent measurement values of the reference signal measurement values corresponding to the index set, and adjust the reference signal measurement values corresponding to the index set based on the measurement value adjustment amount.

[0063] Among them, the adjacent measurement values can be the measurement values having an adjacent relationship with the reference signal measurement value to be modified, and this adjacency can include adjacent reference signal indexes, adjacent measurement times, adjacent measurement frequency bands, and adjacent beam space distributions. The measurement value adjustment amount can be a value determined based on one or more adjacent measurement values.

[0064] In the embodiments of the present application, the indexes of the reference signal to be modified can be determined to form an index set, the corresponding reference signal measurement values can be determined according to the index set, one or more adjacent measurement values adjacent to the reference signal measurement value can be obtained according to the reference signal measurement value, the measurement value adjustment amount can be determined by processing the obtained adjacent measurement values, and the reference signal measurement value to be modified can be adjusted by the determined measurement value adjustment amount, and this adjustment can include methods such as direct replacement, averaging, and summing.

[0065] Further, on the basis of the above application embodiments, the indexes of the index set include at least one of the following:

[0066] Reference signal index, reference signal reception vector index, frequency domain sub-band index.

[0067] In the embodiments of the present application, the index set of the reference signal to be modified can be composed of one or more of the reference signal index, reference signal reception vector index, and frequency domain sub-band index of the reference signal.

[0068] In some cases, the feedback end can determine the measurement values of the interfered reference signal by analyzing historical measurement data or additional measurement data, and then determine the index set of the measurement values to be modified in the reference signal measurement vector.

[0069] In other cases, the feedback end can receive the indication information of the index set of the measurement values to be modified from the configuration end.

[0070] In other cases, the feedback end can determine the index set of the measurement values to be modified according to the preset rules.

[0071] In the embodiments of the present application, the indexes corresponding to the index set of the reference signal to be modified can be determined by the indication information of the reference signal set transmitted by the configuration end, the corresponding index set can be determined by the indication information, or, preset rules can be pre-configured, and the indexes in the index set can be determined by the preset rules.

[0072] Based on the above application embodiments, adjacent includes at least one of the following:

[0073] Adjacent reference signal indexes, adjacent measurement times, adjacent measurement frequency bands, adjacent beam spatial distributions.

[0074] In the embodiments of the present application, the adjacent relationship between adjacent measurement values and measurement values may include at least one of adjacent reference signal indexes, adjacent measurement times, adjacent measurement frequency bands, and adjacent beam spatial distributions.

[0075] In some embodiments of the application, determining the measurement value adjustment amount according to the adjacent measurement values of the reference signal corresponding to the index set includes:

[0076] Determine at least one adjacent measurement value of the corresponding reference signal according to the index set;

[0077] Determine the statistical characteristic value of each adjacent measurement value as the measurement value adjustment amount, where the statistical characteristic value includes at least one of the following: average value, variance, standard deviation, maximum value, minimum value.

[0078] In the embodiments of the present application, one or more adjacent measurement values of each reference signal to be modified can be determined through the index set. For each reference signal to be modified, the statistical characteristic value can be determined by calculating the average value, variance, standard deviation, maximum value, minimum value, etc. of all its corresponding adjacent measurement values. The measurement value of each reference signal to be modified can be replaced with the statistical characteristic value, or the result of adding or subtracting the statistical characteristic value from the measurement value of each reference signal to be modified can be used as the new reference signal measurement value.

[0079] In some other embodiments of the application, interpolation at the preset interpolation position of the measurement vector of the reference signal includes:

[0080] Determine the preset interpolation position of the measurement vector, and insert a preset fixed value at the preset interpolation position, where the preset fixed value belongs to a preset fixed value set, and the preset fixed value set includes at least one preset fixed value.

[0081] Among them, the preset interpolation position can be a pre-specified position, and the preset interpolation position can be determined by receiving the reception mode configuration information transmitted by the configuration end, or determined by a preset rule agreed in advance. The preset fixed value can be a fixed value selected from the preset fixed value set, and the preset fixed value set can be pre-configured.

[0082] In the embodiments of the present application, the preset interpolation position of the measurement vector can be determined, and by selecting one or more preset fixed values from the preset fixed value set and inserting the selected one or more preset fixed values at the preset interpolation position of the measurement vector, the dimension of the measurement vector can be expanded to complete the channel estimation by filling in the missing information.

[0083] In some other application embodiments, interpolation is performed at a preset interpolation position of the measurement vector of the reference signal, including:

[0084] Determine the preset interpolation position of the measurement vector, and insert a preset value at the preset interpolation position, where the preset value is determined based on the measurement vector and a preset interpolation method.

[0085] Wherein, the preset value may be a value to be inserted determined through the measurement vector and the preset interpolation method. The preset interpolation method may include Lagrange interpolation method, Newton interpolation method, periodic extension method, spline interpolation or a custom interpolation method, etc.

[0086] In the embodiments of the present application, the preset interpolation position can be determined within the measurement vector, and the measurement results of multiple corresponding reference signals to be modified in the measurement vector are processed according to the preset difference method, so as to determine one or more preset values. The preset value can be inserted into the preset interpolation position of the test vector to expand the dimension of the measurement vector, thereby completing the missing information and completing the channel estimation.

[0087] Based on the above application embodiments, determining the preset interpolation position of the measurement vector includes at least one of the following:

[0088] Determined according to the indication information of the reference signal set transmitted by the configuration end;

[0089] Determined according to a preset rule.

[0090] In the embodiments of the present application, the method for determining the preset interpolation position within the measurement vector may include being determined by the indication information of the reference signal set transmitted by the configuration end, or may be determined by a preset rule pre-negotiated between the feedback end and the configuration end. The preset rule may include being determined according to a configured fixed position, or being determined according to a function or mapping relationship for determining a fixed position configured in advance, etc.

[0091] Figure 2 It is a flowchart of another information transmission method provided by the embodiments of the present application. The embodiments of the present application are applicable to the case of channel state information estimation configuration in the case of large-scale array antennas. This method can be executed by an information transmission device, and this device can be implemented by software and / or hardware methods and is generally integrated in the configuration end. For example, the configuration end may include a communication node or a virtual node with the ability to send and process reference signals. The configuration end may include a base station. Refer to Figure 2 ., the method provided by the embodiments of the present application specifically includes the following steps:

[0092] Step 210: Send reception mode configuration information to the feedback end.

[0093] Among them, the reception mode configuration information may be information indicating the preprocessing mode of the reference signal to be selected by the feedback end, and the reception mode configuration information may be sent from the configuration end to the feedback end before channel state information measurement.

[0094] In the embodiment of the present application, the configuration end may send reception mode configuration information to the feedback end to indicate the preprocessing mode of the reference signal by the feedback end.

[0095] Step 220: Select a subset of reference signals for transmission from the set of reference signals.

[0096] Among them, the set of reference signals may be a set of all preconfigured reference signals, the subset of reference signals may be a subset of the set of reference signals, and the reference signals within the subset of reference signals may belong to the set of reference signals.

[0097] In the embodiment of the present application, a part of the reference signals may be selected from the set of reference signals to form a subset of reference signals, and the reference signals within the subset of reference signals may be used for transmission.

[0098] Step 230: Map the subset of reference signals to time-frequency domain resources and transmit the reference signals in the subset of reference signals.

[0099] Specifically, the configuration end may map each reference signal within the subset of reference signals to time-frequency domain resources respectively, and the configuration end may send all the reference signals within the subset of reference signals by means of time-frequency domain resources. For example, for non-precoded reference signals, they may be transmitted in different time slots and sub-band resource blocks according to the serial numbers of the reference signals; for precoded reference signals, they may be transmitted in the preset spatial orientation order.

[0100] Step 240: Obtain the channel quantization indication information fed back by the feedback end.

[0101] In the embodiment of the present application, after receiving the reference signals sent by the configuration end, the feedback end may determine the channel state information by measuring the reference signals, the feedback end may quantize the channel information, and feed back the quantized indication information to the configuration end, and the configuration end may receive the channel quantization indication information.

[0102] Further, on the basis of the above application embodiments, the reference signals in the set of reference signals include at least one of the following:

[0103] Channel state information reference signals or synchronization signals.

[0104] In some other application embodiments, the reception mode configuration information includes at least one of the following:

[0105] Indication information of the subset of reference signals for transmission in the set of reference signals;

[0106] Indication information of a subset of reference signals in a reference signal set that is not used for transmission;

[0107] Indication information of the manner of selecting a subset of reference signals from a reference signal set.

[0108] In an embodiment of the present application, the reception mode configuration information may include indication information indicating a subset of reference signals in a reference signal set that is used for transmission, or indication information indicating a subset of reference signals in a reference signal set that is not used for transmission. Alternatively, the reception mode configuration information may indicate the manner of selecting a subset of reference signals from a reference signal set. The reception mode configuration information of the feedback end and the configuration end may be pre-agreed rather than transmitted between the feedback end and the configuration end. For example, the base station may notify the terminal to determine a subset of reference signals by selecting every other reference signal in the reference signal set, or by selecting the first N reference signals in the reference signal set, or by selecting the last N reference signals in the reference signal set. The feedback end may determine the reference signals to be modified based on the reception mode configuration information.

[0109] In one embodiment, the reception mode configuration information sent by the configuration end at least includes an information in the form of a bitmap. The bitmap information is used to notify the feedback end of the subset of reference signals used for transmission. In some cases, the length of the bitmap may be the same as the length of the reference signal set. For example, a bitmap information included in a reception mode configuration information is 0010111001. The set of positions with a value of 1 in this bitmap information can indicate the index set of the reference signals used for transmission, while the positions with a value of 0 represent the set of reference signals not used for transmission. This bitmap information can also be used to indicate the reception timing of the reference signals. The feedback end may determine the interpolation positions based on the bitmap information notified by the configuration end. For example, the positions with a value of 0 in the bitmap information can indicate the interpolation positions within the measurement vector.

[0110] In some cases, the length of the bitmap may be the same as the dimension of the subset of reference signals used for transmission. This bitmap information can be used to notify the feedback end of the set of measurement results of the reference signals that need to be modified. For example, a bitmap information included in a reception mode configuration information is 11010111. The set of positions with a value of 0 in this bitmap information can indicate the position indices of the measurement results to be modified within the measurement vector.

[0111] In some embodiments of the application, the channel quantization indication information includes at least one of the following:

[0112] Precoding information, beam selection information, information on the number of transmission layers or channel rank, measurement reference signal selection information, beam quality information, measurement reference signal resource or port selection information.

[0113] Figure 3 FIG. is an example diagram of an information transmission method provided by an embodiment of the present application. Taking the configuration of channel state information measurement between a base station and a terminal as an example, the information transmission between the base station and the terminal may include the following processes:

[0114] Step 301: The base station selects a subset from the complete set of reference signals, and the reference signals include but are not limited to channel state information reference signals CSI-RS and synchronization signals SS.

[0115] Step 302: The base station uses time-frequency domain to transmit the reference signals in the selected subset of reference signals for channel measurement.

[0116] Step 303: The terminal measures the reference signals used for channel measurement to obtain a reference signal measurement vector.

[0117] Step 304: The base station and the terminal agree on a reference signal reception mode, or the network side sends a signaling to configure the reference signal reception mode. Among them, the reception mode may include that the receiving end preprocesses the reference signal measurement vector according to a specified preprocessing method when receiving the reference signal.

[0118] Step 305: The terminal preprocesses the reference signal measurement vector generated by the received reference signal according to the configured reference signal reception mode.

[0119] Step 306: The terminal performs channel estimation based on the measurement results in the preprocessed reference signal measurement vector and feeds back channel information to the base station. Among them, the channel information may be indication information of a precoding codebook matching the currently estimated channel information, or may be port indication information in a corresponding port selection codebook, or may also be beam index information.

[0120] In the embodiment of the present application, refer to Figure 3, The information transmission between the base station and the terminal can consist of processes such as selecting a reference signal set for transmission, receiving reference signals, preprocessing measurement results, channel estimation, and feedback. The reference signals can be various types defined within existing standard protocols, which can be used for channel measurement. The reference signals can include non-precoded reference signals, precoded reference signals, etc. Different types of reference signals are bound to different antenna entities, and the corresponding feedback information is also different. The base station side can select an appropriate type of reference signal for channel measurement during the channel estimation phase. For each type of reference signal, existing standard protocols generally preset a complete reference signal set. "Complete" can be understood as the dimension of the reference signal set matching the number of base station antenna ports. For example, for non-precoded reference signals, the base station can transmit reference signals on each antenna port, so the dimension of the reference signal set is the same as the number of antenna ports. Another example is that for precoded reference signals, the reference signals are carried on orthogonal beams with the same number of antenna ports. If the scale of the base station side antennas is very large, the dimension of the complete reference signal set is also very large, and the channel estimation process requires a large amount of time-frequency resources. Therefore, the base station can select a subset from the complete reference signal set for channel estimation. The basis for the base station to select the reference signal subset can include prior environmental information, the location information of the terminal, etc., where the prior environmental information can include channel information determined by sensing technologies, the historical feedback information of the terminal, etc.

[0121] After the base station determines the reference signal subset, it places the subset on the preset time-frequency resources and transmits it through the antenna array. For non-precoded reference signals, they can be transmitted in different time slots and sub-band resource blocks according to the serial numbers of the reference signals. For precoded reference signals, they can be transmitted in a certain spatial azimuth order.

[0122] The terminal receives the reference signals transmitted by the base station. Generally, the terminal will listen for and receive reference signals on the specified channel according to the channel estimation configuration information and synchronization information.

[0123] The terminal processes the received reference signals according to the determined preprocessing method. The preprocessing method at least includes modifying the measurement value of at least one reference signal and increasing the dimension of the reference signal measurement vector. For example, modifying the measurement value at a preset position to a preset fixed value; another example is inserting a preset value at a preset position.

[0124] The terminal uses the preprocessed reference signal measurement vector for channel estimation and performs quantization feedback. The feedback methods can include beam selection, codebook feedback, etc.; the channel information includes precoding information, beam selection information, information on the number of layers or rank, measurement reference signal selection information, beam quality information, measurement reference signal resource or port selection information, etc.

[0125] Based on the above application embodiments, the preprocessing methods for the terminal's reference signal measurement results may include the following methods:

[0126] 1. Perform interpolation preprocessing on the measurement data

[0127] In some application embodiments, in order to save the reference signal overhead, the number of reference signals can be compressed using the known partial channel information. At this time, the dimension of the measurement results received by the receiving end (feedback end) is smaller than the dimension of the channel H. For example, during a reference signal transmission process, the base station transmits a total of r reference signals. Therefore, the terminal only receives the measurement values of r reference signals, denoted as y = [y1, y2,..., yr], and the dimension of the channel H is N, where N is greater than r. At this time, the dimension of the y vector can be increased to N through interpolation to match the dimension of H. The specific interpolation methods include the following categories:

[0128] (1) Insert fixed values

[0129] Fixed values can be inserted into the measurement vector corresponding to the reference signal. The fixed value can be zero. The dimension of the received y vector is increased by zero-padding to match the dimension of H. For example, N - r zero values are inserted before the element y1, or N - r zero values are inserted after the element yr, so that the length of the y vector also becomes N. In addition, zero values can also be inserted between multiple elements of the y vector to make the length of the y vector become N. As Figure 4 shown, the length of the original measurement vector is 8, that is, the base station actually only transmits 8 reference signals, while the actual channel dimension on the base station side is 12. Then, the dimension of the measurement vector also needs to be increased to 12. Figure 4 In the preprocessing vectors 1, 2, and 3 in , after interpolation preprocessing, the length of the reference signal measurement vector becomes 12, and zero-padding operations are used at the extended positions.

[0130] The interpolation positions in the measurement vector y can be configured by the base station side through downlink configuration signaling. Specifically, the interpolation positions can be configured according to the indication information of the reference signal set sent by the base station. This indication information can indicate the selected reference signal set or the unselected reference signal set by the base station. The interpolation positions can also be pre-agreed between the base station and the terminal.

[0131] It can be understood that in addition to inserting zero values, other preset values (such as 1 or -1, etc.) can also be considered as the inserted values. It can also be a preset set of numerical values. At different interpolation positions, a numerical value can be selected from this set for interpolation. The above fixed values used to expand the dimension of the y vector can be configured by the base station through downlink configuration signaling or can be pre-agreed.

[0132] (2) Perform interpolation using interpolation algorithms

[0133] In some other application embodiments, there is a certain correlation between multiple reference signals. Therefore, an interpolation algorithm can be considered to determine the values at the preset interpolation positions in the preprocessing of expanding the dimension of the y vector.

[0134] For example, a periodic extension method can be used to determine the values of N - r inserted elements before the y1 element, and this periodic extension method can also be used for interpolation after the yr element.

[0135] Also for example, linear interpolation can be used to determine the interpolation between two adjacent elements in the y vector. A simple linear interpolation is to insert the average value of the two elements on both sides of the interpolation position at this position. Similarly, it can also be the average value of multiple elements near the interpolation position as the inserted value. As Figure 5 shown, the dimension of the original reference signal measurement vector is 8. The terminal inserts two values between the second and third measurement values, another value between the fourth and fifth measurement values, and one value between the fifth and sixth measurement values during preprocessing. The inserted values are all the average values of the measurement values on both sides of this position.

[0136] Also for example, a non - linear interpolation method can be used to determine the values inserted at the specified positions. A typical method for determining the inserted values is the least - squares fitting method, and other algorithms such as spline interpolation can also be used to determine.

[0137] 2. Perform replacement preprocessing on the numerical values of the measurement data

[0138] Due to the existence of interference signals in some communication scenarios, a part of the reference signals received by the terminal is interfered, and the accuracy of channel estimation will be affected to a certain extent. If the data affected by interference can be removed in advance, the reliability of channel estimation can be improved.

[0139] In some application embodiments, a preprocessing method for removing interference is to set some elements in the y vector to zero, that is, to ignore the contribution of this part of the reference signals to channel estimation. As Figure 6 shown, the received vector y contains the received data y1, y2,..., y8 of 8 reference signals, and all these 8 measurement values in the measurement results are non - zero values. If the terminal determines that there are interference signals in the two measurement values y3 and y7, the values at the corresponding positions in the y vector can be changed to zero values, thereby eliminating the influence of interference. In addition to setting the measurement values carrying interference components to zero values, they can also be set to other appropriate fixed values.

[0140] In some other application embodiments, another preprocessing method for removing interference is to replace the data to be removed with the values determined by the interpolation algorithm. For example, the aforementioned y3 and y7 can be replaced with the values determined by the interpolation algorithm, and the interpolation algorithm can be selected from one of the various interpolation algorithms described above. AsFigure 7 as shown

[0141] Based on the above application embodiments, the position of numerical replacement can be determined by the terminal according to signal processing algorithms, such as some interference perception algorithms, or can be configured by the base station through signaling. Generally speaking, the preprocessing of interference suppression needs to know the interference information by at least one of the base station and the terminal to be effectively executed.

[0142] 3. Perform numerical replacement and interpolation preprocessing on the measurement data simultaneously

[0143] In some scenarios, it is necessary to perform two types of preprocessing, namely numerical replacement and interpolation, on the received measurement vector y simultaneously. For example, the dimension of y does not match the dimension of the channel H, and at the same time, y also contains interference information.

[0144] At this time, it can be considered to first perform numerical replacement on the measurement data with interference, eliminate the interference, and then expand the dimension of y through interpolation preprocessing to match the dimension of H. The methods of numerical replacement and interpolation can adopt the methods provided in the above application embodiments.

[0145] Figure 8 is a schematic structural diagram of an information transmission device provided by an embodiment of the present application. This device can execute the information transmission method provided by any embodiment of the present application, and has corresponding functional modules and beneficial effects for executing the method. This device can be implemented by software and / or hardware, and is generally applied to the feedback end, such as a terminal. As Figure 8 shown, the device provided by the embodiment of the present application specifically includes:

[0146] A signal receiving module 401, configured to receive a reference signal for channel measurement.

[0147] A preprocessing module 402, configured to determine a preprocessing method for the reference signal, and perform preprocessing on the reference signal according to the preprocessing method.

[0148] A channel quantization module 403, configured to perform channel estimation according to the preprocessed reference signal, and feedback channel quantization indication information to the configuration end.

[0149] In some application embodiments, the reference signal includes at least one of the following: a channel state information reference signal or a synchronization signal.

[0150] In some application embodiments, the preprocessing module 402 is specifically configured to perform at least one of the following:

[0151] Determine the preprocessing method according to the received reception mode configuration information.

[0152] Determine the preprocessing method according to a prior agreement.

[0153] In some other application embodiments, the preprocessing module 402 further includes at least one of the following:

[0154] A modification unit, configured to modify at least one measurement result of a measurement vector of a reference signal.

[0155] An interpolation unit, configured to perform interpolation at a preset interpolation position of a measurement vector of a reference signal.

[0156] In some application embodiments, the modification unit is specifically configured to: determine a set of indexes of the reference signal to be modified; select a preset value from a preset value set to replace the measurement value of the reference signal corresponding to the set of indexes.

[0157] In some other application embodiments, the modification unit is specifically configured to: determine a set of indexes of the reference signal to be modified; determine a measurement value adjustment amount according to adjacent measurement values of the reference signal measurement value corresponding to the set of indexes, and adjust the reference signal measurement value corresponding to the set of indexes based on the measurement value adjustment amount.

[0158] In some application embodiments, the indexes in the set of indexes in the modification unit include at least one of the following:

[0159] Reference signal index, reference signal reception vector index, frequency domain sub-band index.

[0160] In some other application embodiments, the indexes in the set of indexes in the modification unit are determined according to at least one of the following manners:

[0161] Determined according to the indication information of the reference signal set transmitted by the configuration end;

[0162] Determined according to a preset rule.

[0163] In some application embodiments, the adjacent in the modification unit includes at least one of the following:

[0164] Reference signal index adjacent, measurement time adjacent, measurement frequency band adjacent, beam space distribution adjacent.

[0165] In some application embodiments, the interpolation unit is further specifically configured to: determine at least one adjacent measurement value of the reference signal measurement value corresponding to the set of indexes according to the set of indexes; determine a statistical characteristic value of each adjacent measurement value as the measurement value adjustment amount, where the statistical characteristic value includes at least one of the following: average value, variance, standard deviation, maximum value, minimum value.

[0166] In some other application embodiments, the adjacent in the interpolation unit includes at least one of the following:

[0167] Reference signal index adjacent, measurement time adjacent, measurement frequency band adjacent, beam space distribution adjacent.

[0168] In some application embodiments, the interpolation unit is specifically configured to: determine a preset interpolation position of the measurement vector, and insert a preset fixed value at the preset interpolation position, where the preset fixed value belongs to a preset fixed value set, and the preset fixed value set includes at least one preset fixed value.

[0169] In some application embodiments, the interpolation unit is specifically configured to: determine a preset interpolation position of the measurement vector, and insert a preset value at the preset interpolation position, where the preset value is determined based on the measurement vector and a preset interpolation method.

[0170] In some application embodiments, determining the preset position of the measurement vector includes at least one of the following:

[0171] Determining according to the indication information of the reference signal set transmitted by the configuration end;

[0172] Determining according to a preset rule.

[0173] Figure 9 It is a schematic structural diagram of another information transmission device provided by the embodiments of the present application. The device can execute the information transmission method provided by any embodiment of the present application, and has corresponding functional modules and beneficial effects for executing the method. The device can be implemented by software and / or hardware, and is generally applied to the configuration end, such as a base station. As Figure 9 shown, the device provided by the embodiments of the present application specifically includes:

[0174] A configuration transmission module 501, configured to send reception mode configuration information to the feedback end.

[0175] A subset selection module 502, configured to select a subset of reference signals for transmission from the reference signal set.

[0176] A pilot transmission module 503, configured to map the subset of reference signals to time-frequency domain resources and transmit the reference signals in the subset of reference signals.

[0177] A quantization reception module 504, configured to obtain channel quantization indication information fed back by the feedback end.

[0178] In some application embodiments, the reference signals in the reference signal set in the device include at least one of the following:

[0179] Channel state information reference signals or synchronization signals.

[0180] In some application embodiments, the reception mode configuration information in the device includes at least one of the following:

[0181] Indication information of the subset of reference signals used for transmission in the reference signal set;

[0182] Indication information of the subset of reference signals not used for transmission in the reference signal set;

[0183] Indication information on the manner of selecting a subset of reference signals from a set of reference signals.

[0184] In some application embodiments, the in-device channel quantization indication information includes at least one of the following:

[0185] Precoding information, beam selection information, information on the number of transmission layers or channel rank, measurement reference signal selection information, beam quality information, measurement reference signal resource or port selection information.

[0186] Figure 10 FIG. is a schematic structural diagram of an electronic device provided by an embodiment of the present application. The electronic device includes a processor 60 and a memory 61; the number of processors 60 in the electronic device may be one or more. Figure 10 Taking one processor 60 as an example; the processor 60 and the memory 61 in the electronic device may be connected through a bus or other means. Figure 10 Taking connection through a bus as an example.

[0187] The memory 61, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the modules corresponding to the information transmission device in the embodiments of the present application (signal reception module 401, preprocessing module 402, and channel quantization module 403, or, configuration transmission module 501, subset selection module 502, pilot transmission module 503, and quantization reception module 504). The processor 60 executes various functional applications and data processing of the electronic device by running the software programs, instructions, and modules stored in the memory 61, that is, implements the above information transmission method.

[0188] The memory 61 may mainly include a program storage area and a data storage area. Among them, the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the electronic device. In addition, the memory 61 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some instances, the memory 61 may further include a memory remotely provided relative to the processor 50, and these remote memories may be connected to the electronic device through a network. Examples of the above network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and combinations thereof.

[0189] An embodiment of the present application further provides a storage medium containing computer-executable instructions. The computer-executable instructions are used to execute an information transmission method when executed by a computer processor. The method includes:

[0190] Receiving a reference signal for channel measurement;

[0191] Determine the preprocessing method of the reference signal, and preprocess the reference signal according to the preprocessing method;

[0192] Perform channel estimation based on the preprocessed reference signal, and feedback channel quantization indication information to the configuration end.

[0193] Or,

[0194] The computer-executable instructions, when executed by a computer processor, are used to execute an information transmission method, and the method further includes:

[0195] Send reception mode configuration information to the feedback end;

[0196] Select a subset of reference signals for transmission from the set of reference signals;

[0197] Map the subset of reference signals to time-frequency domain resources, and transmit the reference signals in the subset of reference signals;

[0198] Obtain the channel quantization indication information fed back by the feedback end.

[0199] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software and necessary general-purpose hardware. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk, or optical disc of a computer, etc., including several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various embodiments of this application.

[0200] It should be noted that in the embodiments of the above device, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of the functional units are only for the convenience of mutual distinction and do not limit the protection scope of this application.

[0201] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the devices and equipment can be implemented as software, firmware, hardware, and their appropriate combinations.

[0202] In a hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a single physical component may have multiple functions, or a function or step may be executed by the cooperation of several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application specific integrated circuit. The corresponding software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well 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 includes but is not limited to RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill 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 transmission mechanism, and may include any information delivery media.

[0203] The foregoing has described preferred embodiments of the present application with reference to the accompanying drawings and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and spirit of the present application shall fall within the scope of the rights of the present application.

Claims

1. An information transmission method, characterized in that, applied to the feedback end, the method includes: Receiving a reference signal for channel measurement; Determining a preprocessing method for the reference signal, and preprocessing the reference signal according to the preprocessing method; Performing channel estimation based on the preprocessed reference signal, and feeding back channel quantization indication information to the configuration end.

2. The method according to claim 1, characterized in that, The reference signal includes at least one of the following: Channel state information reference signal or synchronization signal.

3. The method according to claim 1, characterized in that, The determining the preprocessing method for the reference signal includes at least one of the following: Determining the preprocessing method according to the received reception mode configuration information; Determining the preprocessing method according to a pre-agreement.

4. The method according to claim 1, characterized in that, The preprocessing the reference signal according to the preprocessing method includes at least one of the following: Modifying at least one measurement result of the measurement vector of the reference signal; Performing interpolation at a preset interpolation position of the measurement vector of the reference signal.

5. The method according to claim 4, characterized in that, The modifying at least one measurement result of the measurement vector of the reference signal includes: Determining an index set of the reference signal to be modified; Selecting a preset value from a preset value set to replace the measurement value of the reference signal corresponding to the index set.

6. The method according to claim 4, characterized in that, The modifying at least one measurement result of the measurement vector of the reference signal includes: Determining an index set of the reference signal to be modified; Determining a measurement value adjustment amount according to adjacent measurement values of the reference signal measurement value corresponding to the index set, and adjusting the reference signal measurement value corresponding to the index set based on the measurement value adjustment amount.

7. The method according to claim 5 or 6, characterized in that, The index of the index set includes at least one of the following: Reference signal index, reference signal reception vector index, frequency domain sub-band index.

8. The method according to claim 5 or 6, characterized in that, The index of the index set is determined according to at least one of the following methods: Determined according to the indication information of the reference signal set transmitted by the configuration end; Determined according to a preset rule.

9. The method according to claim 6, characterized in that, The determining the measurement value adjustment amount according to adjacent measurement values of the reference signal measurement value corresponding to the index set includes: Determining at least one adjacent measurement value of the reference signal measurement value corresponding to the index set according to the index set; Determining a statistical characteristic value of each adjacent measurement value as the measurement value adjustment amount, where the statistical characteristic value includes at least one of the following: average value, variance, standard deviation, maximum value, minimum value.

10. The method according to claim 6 or 9, characterized in that, The adjacent includes at least one of the following: Reference signal index adjacent, measurement time adjacent, measurement frequency band adjacent, beam space distribution adjacent.

11. The method according to claim 4, characterized in that, The performing interpolation at a preset interpolation position of the measurement vector of the reference signal includes: Determine a preset interpolation position of the measurement vector, and insert a preset fixed value at the preset interpolation position, where the preset fixed value belongs to a preset fixed value set, and the preset fixed value set includes at least one of the preset fixed values.

12. The method according to claim 4, wherein, the interpolating at a preset interpolation position of the measurement vector of the reference signal includes: Determine a preset interpolation position of the measurement vector, and insert a preset value at the preset interpolation position, where the preset value is determined based on the measurement vector and a preset interpolation method.

13. The method according to claim 11 or 12, wherein, the determining of the preset interpolation position of the measurement vector includes at least one of the following: Determined according to the indication information of the set of reference signals transmitted by the configuration end; Determined according to a preset rule.

14. An information transmission method, wherein, applied to a configuration end, the method includes: Send reception mode configuration information to a feedback end; Select a subset of reference signals for transmission from a set of reference signals; Map the subset of reference signals to time-frequency domain resources, and transmit the reference signals in the subset of reference signals; Obtain the channel quantization indication information fed back by the feedback end.

15. The method according to claim 14, wherein, the reference signals in the set of reference signals include at least one of the following: Channel state information reference signals or synchronization signals.

16. The method according to claim 14, wherein, the reception mode configuration information includes at least one of the following: Indication information of the subset of reference signals for transmission in the set of reference signals; Indication information of the subset of reference signals not for transmission in the set of reference signals; Indication information of the manner of selecting a subset of reference signals from the set of reference signals.

17. The method according to claim 14, wherein, the channel quantization indication information includes at least one of the following: Precoding information, beam selection information, information on the number of transmission layers or channel rank, measurement reference signal selection information, beam quality information, measurement reference signal resources or port selection information.

18. An electronic device, wherein, the electronic device includes: One or more processors; A memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the information transmission method as described in any one of claims 1-13 or 14-17.

19. A computer-readable storage medium, wherein, the computer-readable storage medium stores one or more programs, and the one or more programs are executed by one or more processors to implement the information transmission method as described in any one of claims 1-13 or 14-17.

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