CSI-RS outer layer weight reconstruction method and device and readable storage medium

Abstract

The invention provides a channel state information reference signal (CSI-RS) outer layer weight reconstruction method and device and a readable storage medium. The method comprises the following steps: acquiring the strongest transmission receiving point (TRP) and the secondary strongest TRP of each terminal in all terminals under a distributed multiple-input multiple-output (MIMO) cell; judging whether each terminal is located at the central position of the strongest TRP or not according to the strongest TRP and the secondary strong TRP, and determining the terminal located at the central position of the strongest TRP as a central user; and configuring 8-port CSI-RS measurement resources for the central user, reconstructing the CSI-RS outer layer weight, and increasing the space selected by the terminal outer layer weight. According to the method, the device and the readable storage medium, the problem that in an existing distributed MIMO port configuration scheme, CSI-RS port reconfiguration can be caused when a user moves from an overlapping region to a non-overlapping region or moves from the non-overlapping region to the overlapping region, and performance is affected can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a CSI-RS outer layer weight construction method, device and readable storage medium. BACKGROUND

[0002] In order to solve the problem of inter-independent cell overlapping area interference among multiple TRPs (Transmission Reception Point), a distributed MIMO (Multiple-Input Multiple-Output) scheme is adopted, and multiple TRPs form a physical cell with more TRx (virtual 32T32R), which can eliminate the boundary of the original independent cell, and change the interfering antennas in the overlapping coverage into transmitting (receiving) antennas, and change the interference into useful signals.

[0003] After multiple independent cells are merged into a physical cell, the measurement ports configured by the gNB (the next Generation Node B) for the terminal are determined according to the TRx number of the original TRP. For example, the distributed MIMO cell formed by 4T4R TRP configures 8 ports (4TRx*2TRP) for the terminal located in the overlapping area of the TRP, and configures 4 ports (4TRx*1TRP) for the terminal located in the center of a certain TRP.

[0004] In the existing distributed MIMO port configuration scheme, the movement of the user from the overlapping area to the non-overlapping area or the movement of the user from the non-overlapping area to the overlapping area will cause the CSI-RS (Channel State Information-Reference Signal) port reconfiguration to affect the performance. SUMMARY

[0005] The technical problem to be solved by the present application is to solve the above-mentioned problems of the prior art, and to provide a CSI-RS (Channel State Information-Reference Signal) outer layer weight construction method, device and readable storage medium, which can solve the problem that in the existing distributed MIMO port configuration scheme, the movement of the user from the overlapping area to the non-overlapping area or the movement of the user from the non-overlapping area to the overlapping area will cause the CSI-RS port reconfiguration to affect the performance.

[0006] In a first aspect, the present application provides a CSI-RS (Channel State Information-Reference Signal) outer layer weight construction method, which comprises:

[0007] Obtaining the strongest TRP (Transmission Reception Point) and the second strongest TRP of each terminal in all terminals under a distributed MIMO (Multiple-Input Multiple-Output) cell;

[0008] Determine whether each terminal is in the center position of the strongest TRP according to the strongest TRP and the second strongest TRP, and determine the terminal in the center position of the strongest TRP as a center user;

[0009] Configure 8-port CSI-RS measurement resources for the center user, reconstruct the outer layer weight of CSI-RS, and increase the space of terminal outer layer weight selection.

[0010] Further, the strongest transmission reception point (TRP) and the second strongest TRP of each terminal in all terminals of the distributed multiple-input multiple-output (MIMO) cell are obtained, and specifically include:

[0011] According to the channel sounding reference signal (SRS) reference signal received power (RSRP) measurement of each terminal to each TRP of the distributed MIMO cell, the strongest TRP and the second strongest TRP of each terminal are obtained.

[0012] Further, the strongest TRP and the second strongest TRP of each terminal are obtained according to the channel sounding reference signal (SRS) reference signal received power (RSRP) measurement of each terminal to each TRP of the distributed MIMO cell, and specifically include:

[0013] The SRS RSRP strength of each terminal is measured by all antennas in each TRP of the distributed MIMO cell, and the signal level strength of each terminal to each TRP is obtained.

[0014] According to the signal level strength of each terminal to each TRP, the strongest TRP and the second strongest TRP of each terminal are obtained.

[0015] Further, the determination of whether each terminal is in the center position of the strongest TRP according to the strongest TRP and the second strongest TRP specifically includes:

[0016] According to the RSRP difference between the strongest TRP and the second strongest TRP and the absolute value of the RSRP of the second strongest TRP, it is determined whether each terminal is in the center position of the strongest TRP.

[0017] Further, the determination of whether each terminal is in the center position of the strongest TRP according to the RSRP difference between the strongest TRP and the second strongest TRP and the absolute value of the RSRP of the second strongest TRP specifically includes:

[0018] The difference between the RSRP of the strongest TRP and the RSRP of the second strongest TRP of each terminal is calculated, if the difference is greater than a preset difference threshold, it is judged that the terminal is in the central position of the strongest TRP, if the difference is less than or equal to the preset difference threshold, it is further judged whether the absolute value of the RSRP of the second strongest TRP is less than a preset absolute value threshold, if yes, it is judged that the terminal is in the central position of the strongest TRP, otherwise, it is judged that the terminal is not in the central position of the strongest TRP.

[0019] Further, after the 8-port CSI-RS measurement resource is configured for the central user, the CSI-RS outer weight is reconstructed, and the space of the terminal outer weight selection is increased, the method further comprises:

[0020] By traversing different angle differences between polarizations, a codebook with the same polarization phase difference and consistent beam is selected as the outer weight codebook, so that the matching degree of the outer weight and the channel is improved.

[0021] In a second aspect, the present application provides a channel state information reference signal (CSI-RS) outer weight reconstruction device, which comprises:

[0022] The strength acquisition module is configured to acquire the strongest transmission reception point (TRP) and the second strongest TRP of each terminal in all terminals of a distributed multiple-input multiple-output (MIMO) cell.

[0023] The central user determination module is connected with the strength acquisition module and is configured to determine whether each terminal is in the central position of the strongest TRP according to the strongest TRP and the second strongest TRP, and determine the terminal in the central position of the strongest TRP as a central user.

[0024] The outer weight reconstruction module is connected with the central user determination module and is configured to configure an 8-port CSI-RS measurement resource for the central user, reconstruct the CSI-RS outer weight, and increase the space of the terminal outer weight selection.

[0025] Further, the strength acquisition module comprises:

[0026] The strength acquisition unit is configured to obtain the strongest TRP and the second strongest TRP of each terminal according to the channel sounding reference signal (SRS) reference signal received power (RSRP) measurement of each terminal to each TRP of the distributed MIMO cell.

[0027] In a third aspect, the present application provides a channel state information reference signal (CSI-RS) outer weight reconstruction device, which comprises a memory and a processor, the memory stores a computer program, and the processor is configured to run the computer program to realize the CSI-RS outer weight reconstruction method of the first aspect.

[0028] In a fourth aspect, the present application provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the CSI-RS outer layer weight construction method in the first aspect.

[0029] The CSI-RS outer layer weight construction method, device and computer readable storage medium provided by the present application firstly acquire the strongest transmission reception point (TRP) and the second strongest TRP of each terminal in all terminals in a distributed multiple-input multiple-output (MIMO) cell; then determine whether each terminal is in the central position of the strongest TRP according to the strongest TRP and the second strongest TRP, and determine the terminal in the central position of the strongest TRP as a central user; and then configure 8-port CSI-RS measurement resources for the central user to reconstruct the CSI-RS outer layer weight and increase the selection space of the terminal outer layer weight. The present application can solve the problem of port reconfiguration when the user moves in the TRP overlapping area and the non-overlapping area, can improve the selection space of the user codebook, improve the performance of the central user, and solve the problem that the CSI-RS port reconfiguration affects the performance when the user moves from the overlapping area to the non-overlapping area or moves from the non-overlapping area to the overlapping area in the existing distributed MIMO port configuration scheme. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A flow chart of a CSI-RS outer layer weight construction method according to the first embodiment of the present application;

[0031] Figure 2 A flow chart of another CSI-RS outer layer weight construction method according to the first embodiment of the present application;

[0032] Figure 3 A level diagram of a single terminal to each TRP according to the embodiment of the present application;

[0033] Figure 4 A port mapping mode and codebook quantization dimension of a central user in an existing distributed MIMO cell;

[0034] Figure 5 A port mapping mode and codebook quantization dimension of a central user in a distributed MIMO cell according to the embodiment of the present application;

[0035] Figure 6 A structure diagram of a CSI-RS outer layer weight construction device according to the second embodiment of the present application;

[0036] Figure 7 A structure diagram of a CSI-RS outer layer weight construction device according to the third embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the technical solution of the present application better understood by those skilled in the art, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

[0038] It can be understood that the specific embodiments and drawings described herein are merely intended to explain the present application, but not to limit the present application.

[0039] It can be understood that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0040] It can be understood that, for the convenience of description, only the parts related to the present application are shown in the drawings of the present application, and the parts unrelated to the present application are not shown in the drawings.

[0041] It can be understood that each unit and module involved in the embodiments of the present application can correspond to only one entity structure, or can be composed of multiple entity structures, or multiple units and modules can be integrated into one entity structure.

[0042] It can be understood that the terms "first", "second", etc. in the embodiments of the present application are used to distinguish different objects, or to distinguish different processing of the same object, but not to describe the specific order of the object.

[0043] It can be understood that the functions and steps marked in the flowcharts and block diagrams of the present application can occur in an order different from that marked in the drawings without conflict.

[0044] It can be understood that in the flowcharts and block diagrams of the present application, the architecture, functions and operations of the possible implementation of the system, device, equipment and method according to the embodiments of the present application are shown. Each block in the flowchart or block diagram can represent a unit, module, program segment, code, which contains executable instructions for realizing the specified function. Moreover, each block or combination of blocks in the block diagram and flowchart can be realized by a hardware-based system for realizing the specified function, or by a combination of hardware and computer instructions.

[0045] It can be understood that the units and modules involved in the embodiments of the present application can be realized by software or by hardware, for example, the units and modules can be located in a processor.

[0046] Embodiment 1:

[0047] The embodiment provides a CSI-RS outer layer weight construction method, as shown in the following formula (1), the method comprises the following steps. Figure 1

[0048] Step S101: acquiring the strongest transmission reception point (TRP) and the second strongest TRP of each terminal in all terminals in a distributed multiple-input multiple-output (MIMO) cell.​

[0049] In the embodiment, the strongest TRP and the second strongest TRP of each terminal can be obtained according to SRS (Sounding Reference Signal) RSRP (Reference Signal Receiving Power) measurements of each terminal to each TRP of the distributed MIMO cell.

[0050] Optionally, the strongest TRP and the second strongest TRP of each terminal are obtained according to SRS RSRP measurements of each terminal to each TRP of the distributed MIMO cell, and specifically include:

[0051] SRS RSRP strengths of each terminal are measured by all antennas in each TRP of the distributed MIMO cell to obtain signal level strengths of each terminal to each TRP;

[0052] The strongest TRP and the second strongest TRP of each terminal are obtained according to the signal level strengths of each terminal to each TRP.

[0053] In the embodiment, SRS RSRP strengths of a single terminal are measured by all antennas in each TRP of the distributed MIMO cell, each TRP obtains signal level strengths of the single terminal to each TRP by calculating linear average values of SRS RSRP measured by each antenna to the single terminal, and then the strongest TRP is the one with the largest signal level strength and the second strongest TRP is the one with the second largest signal level strength.

[0054] Step S102: judging whether each terminal is at the center position of the strongest TRP according to the strongest TRP and the second strongest TRP, and determining the terminal at the center position of the strongest TRP as a center user.

[0055] In the embodiment, whether each terminal is at the center position of the strongest TRP can be judged according to RSRP differences of the strongest TRP and the second strongest TRP, for example, when a terminal satisfies the following condition, it can be judged that the terminal is at the center position of the TRP:

[0056] Condition: "UE strongest TRP_RSRP" - "UE second strongest TRP_RSRP" > xxdB threshold.

[0057] Optionally, the strongest TRP and the second strongest TRP of each terminal are obtained according to SRS RSRP measurements of each terminal to each TRP of the distributed MIMO cell, and specifically include:

[0058] Whether each terminal is at the center position of the strongest TRP is judged according to RSRP differences of the strongest TRP and the second strongest TRP and an absolute value of RSRP of the second strongest TRP.

[0059] In the embodiment, whether each terminal is in the center position of the strongest TRP can also be determined according to the RSRP difference between the strongest TRP and the second strongest TRP and the absolute value of the RSRP of the second strongest TRP. Specifically, the difference between the RSRP of the strongest TRP and the RSRP of the second strongest TRP of each terminal is calculated. If the difference is greater than a preset difference threshold, it is determined that the terminal is in the center position of the strongest TRP. If the difference is less than or equal to the preset difference threshold, it is further determined whether the absolute value of the RSRP of the second strongest TRP is less than a preset absolute value threshold. If yes, it is determined that the terminal is in the center position of the strongest TRP. Otherwise, it is determined that the terminal is not in the center position of the strongest TRP. For example, assuming that the defined difference threshold is 9 dB and the absolute value threshold is -120 dB. Then, when the RSRP of user A to the strongest TRP is -90 dB and the RSRP of user A to the second strongest TRP is -95 dB, the RSRP difference is 5 dB, and 5 dB < 9 dB. User A is a non-center user. Conversely, when the RSRP of user B to the strongest TRP is -90 dB and the RSRP of user B to the second strongest TRP is -100 dB, the RSRP difference is 10 dB, and 10 dB > 9 dB. User B is a center user. In addition, when the RSRP of user C to the strongest TRP is -115 dB and the RSRP of user C to the second strongest TRP is -121 dB, the RSRP difference is 6 dB, but the absolute value of the RSRP of the second strongest TRP is -121 dB. User C is a center user.

[0060] Step S103: configuring 8-port CSI-RS measurement resources for the center user, reconstructing the outer layer weight of the CSI-RS, and increasing the space for selecting the outer layer weight of the terminal.

[0061] In the embodiment, the distributed MIMO cell configures 8-port CSI-RS measurement resources for the center user, reconstructs the outer layer weight of the CSI-RS, and increases the space for selecting the outer layer weight of the terminal, thereby being able to solve the problem of port switching and reconfiguration when the user moves in the TRP overlapping area and the non-overlapping area.

[0062] It should be noted that the dimension of the outer layer weight is

port

Trx

[0063] Optionally, after the 8-port CSI-RS measurement resources are configured for the center user, the outer layer weight of the CSI-RS is reconstructed, and the space for selecting the outer layer weight of the terminal is increased, the method further includes:

[0064] By traversing different angle differences between polarizations, a codebook with the same polarization phase difference and consistent beam is selected as the outer layer weight codebook to improve the matching degree of the outer layer weight and the channel.

[0065] In the embodiment, by traversing different angle differences between polarizations, a codebook with the same polarization phase difference and consistent beam is selected, so that the outer weight and channel matching degree can be improved.

[0066] It should be noted that, in the current distributed MIMO port configuration scheme, the port configuration of users in the TRP overlapping area and the non-overlapping area is inconsistent, which causes the port to be reconfigured when mobile switching, which may affect the downlink performance, so there is an urgent need for a reconfiguration-free port configuration scheme to solve this problem. Therefore, the application provides a CSI-RS outer weight reconstruction method for improving the performance of the center user of each TRP of the distributed MIMO cell, which is specifically used to solve the problem. Through the application, the problem of reconfiguring the port when the user moves in the TRP overlapping area and the non-overlapping area can be solved. At the same time, the CSI-RS outer weight reconstruction technology provides an outer weight codebook with more quantization dimensions and quantization accuracy, which can improve the matching degree of the outer weight and the channel and improve the performance of the center user. The application can be widely applied to the distributed MIMO scene. By identifying the center user of each TRP and reconstructing the CSI-RS outer weight, an outer weight codebook with more quantization dimensions and quantization accuracy is provided, the matching degree of the outer weight and the channel is improved, and the performance of the center user is improved.

[0067] In one specific embodiment, as shown in Figure 2 a CSI-RS outer weight reconstruction method for improving the performance of the center user of each TRP of the distributed MIMO cell is provided, which specifically includes the following steps:

[0068] (1) According to the SRS RSRP measurement of each terminal to each TRP of the distributed MIMO cell, the strongest TRP and the second strongest TRP of each terminal are obtained,

[0069] (2) By comparing the difference threshold of the strongest TRP and the second strongest TRP and the absolute value of the second strongest TRP with the threshold, it is judged whether the terminal is in the center position of the strongest TRP, which is defined as the center user.

[0070] Specifically, the difference between the RSRP of the strongest TRP and the RSRP of the second strongest TRP of each terminal can be calculated. If the difference is greater than a preset difference threshold, it is judged that the terminal is in the center position of the strongest TRP. If the difference is less than or equal to the preset difference threshold, it is further judged whether the absolute value of the RSRP of the second strongest TRP is less than a preset absolute value threshold. If yes, it is judged that the terminal is in the center position of the strongest TRP. Otherwise, it is judged that the terminal is not in the center position of the strongest TRP.

[0071] For example, assuming that the defined difference threshold is 9dB, and the absolute value threshold is -120dB;Then: when user A to the strongest TRP RSRP is -90dB, to the second strongest TRP RSRP is -95dB, the RSRP difference is 5dB, 5dB<9dB, the user A is a non-central user;On the contrary, user B to the strongest TRP RSRP is -90dB, to the second strongest TRP RSRP is -100dB, the RSRP difference is 10dB, 10dB>9dB, then user B is a central user;In addition, user C to the strongest TRP RSRP is -115dB, to the second strongest TRP RSRP is -121dB, the RSRP difference is 6dB, but the absolute value of the RSRP of the second strongest TRP is -121dB, user C is a central user.

[0072] (3) The distributed MIMO cell configures 8-port CSI-RS measurement resources for the central user, reconstructs the outer layer weight of CSI-RS, increases the space of terminal outer layer weight selection, traverses different angle differences between polarizations, selects the codebook with the same polarization phase difference and consistent beam, and improves the matching degree of the outer layer weight and the channel.

[0073] It should be noted that the present application provides a CSI-RS outer layer weight reconstruction method based on gNB port active configuration CSI-RS measurement, which can solve the problem of port switching and reconfiguration when the user moves in the TRP overlapping area and the non-overlapping area. At the same time, the CSI-RS outer layer weight reconstruction technology provides more quantization dimension and quantization accuracy of the outer layer weight codebook, which can improve the matching degree of the outer layer weight and the channel, and improve the performance of the central user.

[0074] In another specific embodiment, the CSI-RS outer layer weight reconstruction method can include the following steps:

[0075] 1) All antennas in each TRP of the distributed MIMO cell measure the SRS RSRP intensity of a single terminal, and each TRP obtains the signal level intensity of the single terminal to each TRP by calculating the linear average of the SRS RSRP measured by each antenna to the single terminal, for example, the obtained single terminal to each TRP level diagram can be as shown in Figure 3 .

[0076] 2) The signal level intensity of the strongest TRP and the second strongest TRP of the terminal is compared to determine the user position attribute of the terminal. If the terminal satisfies the following conditions, it is determined that the terminal is in the central position of the TRP:

[0077] Condition: "UE strongest TRP_RSRP"-"UE second strongest TRP_RSRP">xxdB threshold

[0078] 3) Repeat steps 1~2 for all data terminals under distributed MIMO to obtain the location attribute information of all data terminals at the TRP, and the distributed MIMO cell configures the 8-port CSI-RS resource for the terminal with the attribute in 2 as the center user to provide more quantization dimensions and quantization accuracy of the outer weight codebook.

[0079] For example, Figure 4 As shown in the prior port mapping mode of the center user under the distributed MIMO cell before adopting the method and the quantization dimension of the codebook, the outer weight codebook only has the quantization information θ of the horizontal dimension, which is 5 bits for the accuracy of ports 0 and 1 and ports 2 and 3; Figure 5 As shown in the reconstructed CSI-RS outer weight CSI-RS measurement resource after adopting the method, the quantization dimension of the outer weight codebook has θ of the horizontal dimension and of the vertical dimension Among them, the horizontal dimension is port 0 and 1, the vertical dimension is port 4 and 6, and the accuracy is 8 (Rank1) / 9 (Rank234) bits. It should be noted that, Figure 5 The darker black line in the figure is used to identify the virtually generated port, and 2375 is also quantized, which is the same as 23 and 01, and 75 and 64.

[0080] The CSI-RS outer weight reconstruction method provided by the embodiment of the application first acquires the strongest transmission reception point (TRP) and the second strongest TRP of each terminal in all terminals under a distributed multiple input multiple output (MIMO) cell; then determines whether each terminal is at the center position of the strongest TRP according to the strongest TRP and the second strongest TRP, and determines the terminal at the center position of the strongest TRP as a center user; and configures 8-port CSI-RS measurement resources for the center user, reconstructs the CSI-RS outer weight, and increases the space for selecting the outer weight of the terminal. The application can solve the problem of port reconfiguration when the user moves in the TRP overlapping area and the non-overlapping area, can improve the selection space of the codebook of the user, and can improve the performance of the center user. The application solves the problem that in the existing distributed MIMO port configuration scheme, when the user moves from the overlapping area to the non-overlapping area or moves from the non-overlapping area to the overlapping area, the CSI-RS port reconfiguration affects the performance.

[0081] Embodiment 2:

[0082] As Figure 6 As shown in the figure, the embodiment provides a channel state information reference signal (CSI-RS) outer weight reconstruction device for executing the above-mentioned CSI-RS outer weight reconstruction method, which comprises:

[0083] The strength acquisition module 11 is configured to acquire the strongest transmission reception point (TRP) and the second strongest TRP of each terminal in all terminals under a distributed multiple input multiple output (MIMO) cell;

[0084] The center user determining module 12 is connected with the intensity obtaining module 11, and is configured to determine whether each terminal is in the center position of the strongest TRP according to the strongest TRP and the second strongest TRP, and determine the terminal in the center position of the strongest TRP as the center user.

[0085] The outer layer weight reconstructing module 13 is connected with the center user determining module 12, and is configured to configure 8-port CSI-RS measurement resources for the center user, and reconstruct the outer layer weight of the CSI-RS, so as to increase the space of the outer layer weight selection of the terminal.

[0086] Optionally, the intensity obtaining module 11 comprises:

[0087] An intensity obtaining unit is configured to obtain the strongest TRP and the second strongest TRP of each terminal according to the channel sounding reference signal (SRS) reference signal received power (RSRP) measurement of each terminal to each TRP of the distributed MIMO cell.

[0088] Optionally, the intensity obtaining unit specifically comprises:

[0089] A measuring unit is configured to measure the SRS RSRP intensity of each terminal through all antennas in each TRP of the distributed MIMO cell, so as to obtain the signal level intensity of each terminal to each TRP.

[0090] An obtaining unit is configured to obtain the strongest TRP and the second strongest TRP of each terminal according to the signal level intensity of each terminal to each TRP.

[0091] Optionally, the center user determining module 12 comprises:

[0092] A center position judging unit is configured to determine whether each terminal is in the center position of the strongest TRP according to the RSRP difference value of the strongest TRP and the second strongest TRP and the RSRP absolute value of the second strongest TRP.

[0093] Optionally, the center position judging unit is specifically configured to:

[0094] Calculate the difference value between the RSRP of the strongest TRP and the RSRP of the second strongest TRP of each terminal, if the difference value is greater than a preset difference value threshold, it is determined that the terminal is in the center position of the strongest TRP, if the difference value is less than or equal to the preset difference value threshold, it is further determined whether the RSRP absolute value of the second strongest TRP is less than a preset absolute value threshold, if yes, it is determined that the terminal is in the center position of the strongest TRP, otherwise, it is determined that the terminal is not in the center position of the strongest TRP.

[0095] Optionally, the device further comprises:

[0096] The lifting module is configured to select a codebook with the same polarization phase difference and consistent beam as an outer weight codebook by traversing different angle differences between polarizations, so as to improve the matching degree of the outer weight and the channel.

[0097] Embodiment 3

[0098] Reference Figure 7 The embodiment provides a channel state information reference signal (CSI-RS) outer weight construction device, which comprises a memory 21 and a processor 22. The memory 21 stores a computer program. The processor 22 is configured to run the computer program to perform the CSI-RS outer weight construction method in the embodiment 1.

[0099] The memory 21 is connected with the processor 22. The memory 21 can be a flash memory or a read-only memory or other memories. The processor 22 can be a central processing unit or a single-chip microcomputer.

[0100] Embodiment 4

[0101] The embodiment provides a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the CSI-RS outer weight construction method in the above embodiment 1.

[0102] The computer readable storage medium includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storing information such as computer readable instructions, data structures, computer program modules or other data. The computer readable storage medium includes but is not limited to RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable read only memory), flash memory or other memory technologies, CD-ROM (Compact Disc Read-Only Memory), digital versatile disc (DVD) or other optical disc storage, magnetic cassette, magnetic tape, magnetic disc storage or other magnetic storage device, or any other medium that can be used to store desired information and can be accessed by a computer.

[0103] In summary, the channel state information reference signal (CSI-RS) outer layer weight reconstruction method, device and readable storage medium provided by the embodiment of the application first acquire the strongest transmission reception point (TRP) and the second strongest TRP of each terminal in all terminals under a distributed multiple-input multiple-output (MIMO) cell; then determine whether each terminal is at the center position of the strongest TRP according to the strongest TRP and the second strongest TRP, and determine the terminal at the center position of the strongest TRP as a center user; and then configure 8-port CSI-RS measurement resources for the center user to reconstruct the CSI-RS outer layer weight and increase the selection space of the terminal outer layer weight. The application can solve the problem of port reconfiguration when the user moves in the TRP overlapping area and the non-overlapping area, can improve the selection space of the user codebook, improve the performance of the center user, and solve the problem that in the existing distributed MIMO port configuration scheme, when the user moves from the overlapping area to the non-overlapping area or moves from the non-overlapping area to the overlapping area, the CSI-RS port reconfiguration will affect the performance.

[0104] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the application, and the application is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the application, and these modifications and improvements are also considered to be within the protection scope of the application.

Claims

1. A method for constructing an outer layer weight of a channel state information reference signal (CSI-RS), characterized in that, The method comprises: Obtaining the strongest transmission reception point (TRP) and the second strongest TRP of each terminal under a distributed multiple-input multiple-output (MIMO) cell; Determining whether each terminal is in the center position of the strongest TRP according to the strongest TRP and the second strongest TRP, and determining the terminal in the center position of the strongest TRP as a center user; Configuring 8-port CSI-RS measurement resources for the center user, reconstructing the outer layer weight of CSI-RS, and increasing the space of the outer layer weight selection of the terminal.

2. The method of claim 1, wherein, The method comprises: Obtaining the strongest TRP and the second strongest TRP of each terminal according to the channel sounding reference signal (SRS) reference signal received power (RSRP) measurement of each terminal to each TRP of the distributed MIMO cell.

3. The method of claim 2, wherein, The method comprises: Measuring the SRS RSRP intensity of each terminal through all the antennas of each TRP of the distributed MIMO cell to obtain the signal level intensity of each terminal to each TRP; Obtaining the strongest TRP and the second strongest TRP of each terminal according to the signal level intensity of each terminal to each TRP.

4. The method of claim 1, wherein, The method comprises: Determining whether each terminal is in the center position of the strongest TRP according to the RSRP difference of the strongest TRP and the second strongest TRP and the RSRP absolute value of the second strongest TRP.

5. The method of claim 4, wherein, The method comprises: Calculating the difference between the RSRP of the strongest TRP and the RSRP of the second strongest TRP of each terminal, if the difference is greater than a preset difference threshold, it is determined that the terminal is in the center position of the strongest TRP, if the difference is less than or equal to the preset difference threshold, it is further determined whether the RSRP absolute value of the second strongest TRP is less than a preset absolute value threshold, if yes, it is determined that the terminal is in the center position of the strongest TRP, otherwise, it is determined that the terminal is not in the center position of the strongest TRP.

6. The method of claim 1, wherein, The method further comprises: Selecting the codebook with the same polarization phase difference and consistent beam as the outer layer weight codebook by traversing different angle differences between polarizations to improve the matching degree of the outer layer weight and the channel.

7. A Channel State Information Reference Signal (CSI-RS) outer weight reconstruction device, characterized in that, The device comprises: An intensity obtaining module configured to obtain the strongest TRP and the second strongest TRP of each terminal under a distributed multiple-input multiple-output (MIMO) cell; The center user determining module is connected with the intensity obtaining module, and is configured to determine whether each terminal is in a center position of the strongest TRP according to the strongest TRP and the sub-strongest TRP, and determine the terminal in the center position of the strongest TRP as a center user. The outer layer weight constructing module is connected with the center user determining module, and is configured to configure 8-port CSI-RS measurement resources for the center user, and construct the outer layer weight of the CSI-RS, so as to increase the space of the outer layer weight selection of the terminal.

8. The apparatus of claim 7, wherein, The intensity obtaining module comprises: An intensity obtaining unit is configured to obtain the strongest TRP and the sub-strongest TRP of each terminal according to the channel sounding reference signal (SRS) reference signal received power (RSRP) measurement of each terminal to each TRP of the distributed MIMO cell. 9.A device for constructing an outer-layer weight of a channel state information reference signal (CSI-RS), characterized in that, The computer readable storage medium stores a computer program, and the processor is configured to execute the computer program to implement the CSI-RS outer layer weight construction method according to any one of claims 1-6.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the processor is configured to execute the computer program to implement the CSI-RS outer layer weight construction method according to any one of claims 1-6.

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