Cell antenna calibration method, electronic device and storage medium

Abstract

The present application relates to the field of antenna correction, and proposes a correction method, electronic device and storage medium for a cell antenna. The correction method for a cell antenna includes: obtaining a joint correction group, wherein the joint correction group is a collection of cells to be corrected; receiving correction parameters reported by the cells to be corrected after mutually sending correction sequences at several different frequencies and updating the correction parameters into a correction record table; selecting a reference cell and a reference channel corresponding to the reference cell in the joint correction group according to the correction record table; obtaining a first parameter in the transceiver process reported after mutually sending correction sequences between the reference channel and the non-reference channel and calculating a first correction value of the non-reference channel according to the first parameter; sending the first correction value to the corresponding non-reference channel for correction of the non-reference channel. Applied in the correction process of the cell antenna, the purpose of simultaneously correcting all cells in the environment is achieved.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of antenna calibration, and in particular to a calibration method, electronic device, and storage medium for a cell antenna. Background Art

[0002] Distributed-MIMO (D-MIMO) and Coordinated Multiple Points (CoMP) are important technologies in communication technology. The D-MIMO system includes multiple base stations and multiple remote radio units (RRUs). The scenarios are complex, and the CoMP technology requires the amplitude and phase to be consistent. However, due to the non-ideality of the circuit, there will be delays, amplitudes, and phases between multiple RRU channels in the D-MIMO system. Therefore, in order to implement the CoMP technology, the antennas in the cell must be corrected to eliminate this inconsistency. The essence of antenna correction is to reduce the relative error between channels through the idea of ​​closed-loop feedback and perform correction with the antenna. Therefore, the traditional cell antenna correction method is to send data between the correction channel on the remote radio unit (RRU) and the transceiver channel, and then the base station compares the amplitude and phase obtained by measuring the received data of each channel and calculates the amplitude and phase differences between the channels. Then the RRU supplements the amplitude and phase according to the amplitude and phase differences to obtain multiple channels with consistent amplitude and phase.

[0003] However, interference is prone to occur between RRUs and the signal in the cell edge area is also poor, so only the antenna in one cell can be calibrated at a time, which is very inefficient in multi-cell scenarios. Summary of the invention

[0004] The main purpose of the embodiments of the present application is to provide a calibration method for a cell antenna, an electronic device and a storage medium, aiming to achieve simultaneous calibration of all cells in an environment, thereby improving the calibration efficiency.

[0005] To achieve the above-mentioned purpose, an embodiment of the present application provides a method for calibrating a cell antenna, the method comprising the following steps: obtaining a joint correction group, wherein the joint correction group is a collection of cells to be corrected; receiving correction parameters reported by the cells to be corrected after sending correction sequences to each other and updating the correction parameters into a correction record table; selecting a reference cell and a reference channel corresponding to the reference cell in the joint correction group according to the correction record table; obtaining a first parameter in the receiving and transmitting process reported after the reference channel and non-reference channel send correction sequences to each other and calculating a first correction value of the non-reference channel according to the first parameter; and sending the first correction value to the corresponding non-reference channel for correction of the non-reference channel.

[0006] To achieve the above object, an embodiment of the present invention further provides an electronic device, the device comprising:

[0007] at least one processor; and,

[0008] a memory communicatively connected to the at least one processor; wherein,

[0009] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the above-mentioned cell antenna calibration method.

[0010] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program, wherein the computer program implements the above-mentioned cell antenna calibration method when executed by a processor.

[0011] Compared with the prior art, the embodiments of the present invention can obtain a joint correction group including multiple cells to be corrected, and then receive the correction parameters reported by the cells to be corrected after the cells to be corrected send correction sequences to each other, and then select the reference cell and the reference channel on the reference cell from the joint correction group according to the correction record table storing the correction parameters, and then after the reference channel and the non-reference channel send correction signals to each other, receive the first parameter reported by the channel, so that the first correction value required for aligning the non-reference channel to the reference channel can be directly calculated according to the first parameter, and finally the first correction value is sent to the corresponding non-reference channel for the non-reference channel correction channel in the cell, thereby performing antenna correction on multiple cells to be corrected in the joint correction group at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] One or more embodiments are exemplarily described by the pictures in the corresponding drawings, and these exemplary descriptions do not constitute limitations on the embodiments.

[0013] Figure 1 is a flow chart of a method for calibrating a cell antenna provided in the first embodiment of the present application;

[0014] Figure 2 yes Figure 1 The flowchart of step 101 in the method for calibrating a cell antenna provided by the first embodiment of the present invention is shown;

[0015] Figure 3 The CoMP cell topology structure involved in the cell antenna calibration method provided in the first embodiment of the present application;

[0016] Figure 4 is a flow chart of a method for calibrating a cell antenna provided in a second embodiment of the present application;

[0017] Figure 5 is a flow chart of a method for calibrating a cell antenna provided in a third embodiment of the present application;

[0018] Figure 6 is a flow chart of a method for calibrating a cell antenna provided in a fourth embodiment of the present application;

[0019] Figure 7 This is an application scenario of the cell antenna calibration method provided in the fourth embodiment of the present application;

[0020] Figure 8 It is a schematic diagram of the structure of an electronic device provided in the seventh embodiment of the present application. DETAILED DESCRIPTION

[0021] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be construed as any limitation, and the various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0022] The first embodiment of the present application relates to a calibration method for a cell antenna, which is applied to a base station, such as Figure 1 As shown, specifically including:

[0023] Step 101: obtain a joint correction group, where the joint correction group is a set of cells to be corrected.

[0024] Specifically, if Figure 2 As shown, step 101 includes:

[0025] Step 201: Obtain a CoMP cell list and cooperative neighbor relations between cells.

[0026] Specifically, CoMP is the abbreviation of Coordinated Multiple Points. A CoMP cell is a cell that can apply CoMP technology. CoMP cells are in a cooperative relationship based on the cooperative neighbor relationship between each other to provide services for a certain user. Figure 3 As shown, nodes a, b, c, d, e, f, g, and h are all CoMP cells, and the connection lines between the nodes are the cooperative neighbor relationships between the CoMP cells.

[0027] Step 202: Delete the cells that cannot be jointly calibrated in the cell list according to the preset filtering rule, and obtain a list of cells to be calibrated.

[0028] Specifically, the filtering rule may be that the RRUs corresponding to the CoMP cell need to meet a quantity threshold or a specific RRU type, or that the state of the transceiver channel needs to meet a certain threshold condition, etc. Of course, the above is only a specific example, and in actual use, the filtering rules may also include other rules, which are not described one by one here.

[0029] Step 203, obtaining n joint correction groups according to the list of cells to be corrected and the cooperative neighbor relationship, wherein n is the number of cells in the list of cells to be corrected, and the joint correction group is a set consisting of a determined cell to be corrected in the list of cells to be corrected and cells having a cooperative neighbor relationship with the cell.

[0030] Specifically, one cell in the list of cells to be corrected is selected in turn as the central CoMP cell, the cell to be corrected is searched according to the cooperative neighbor relationship of the central CoMP cell, and the central cell and the found cell are formed into a joint correction group.

[0031] More specifically, if Figure 3 As shown, assuming that cell a is taken as the center CoMP cell, a joint correction group {a, b, c, d, e} is formed, and so on, until all cells in the list of cells to be corrected are taken as the center to establish a joint correction group.

[0032] Step 102: receiving the correction parameters reported by the cells to be corrected after sending correction sequences to each other at several different frequencies and updating the correction parameters into the correction record table.

[0033] Specifically, all cells to be corrected are notified to mutually send correction sequences. After receiving the notification, the cells to be corrected send correction sequences at several different frequencies and receive correction sequences of other cells to be corrected and measure and record correction parameters, wherein the correction parameters include correction routes, correction levels, etc.

[0034] More specifically, the base station notifies all cells to be corrected to receive and transmit the correction sequence with power offsets of 0db, 5db, -5db, 10db and -10db, and actively attempts to perform mutual correction at different powers by changing the power, thereby increasing the probability of successful correction, preventing correction failure caused by low signal-to-noise ratio due to excessive interference power, or correction failure caused by excessive RRU channel power superposition and saturation, and then sequentially uses one cell to be corrected as the transmitting end of the correction sequence and the remaining cells as the receiving end of the correction sequence to receive and transmit the correction sequence. The cell to be corrected as the receiving end will detect and report correction parameters such as correction route and correction level. Finally, the base station receives all correction parameters and updates the correction parameters to the correction record table of the corresponding power. Of course, the above offset power is only a specific example. In actual use, other offset powers can also be used, which will not be described here one by one.

[0035] Step 103 : selecting a reference cell and a reference channel corresponding to the reference cell in the joint calibration group according to the calibration record table.

[0036] Step 104 , obtaining a first parameter in the transceiver process reported after the reference channel and the non-reference channel mutually send a calibration sequence, and calculating a first calibration value of the non-reference channel according to the first parameter.

[0037] Specifically, step 104 can calculate the first correction value in three ways:

[0038] The first is that both the reference channel and the non-reference channel are self-calibrated:

[0039] Receive the self-correction compensation values ​​reported by all cells to be corrected after self-correction, and then calculate the first correction value by the following formula:

[0040]

[0041] The first parameter includes the reference channel signal parameter and the non-reference channel signal parameter, y1 is the first correction value; x 1→2 is the reference channel signal parameter, which is the signal parameter measured when the reference channel sends the calibration sequence and the non-reference channel receives the calibration sequence; x 2→1 is the non-reference channel signal parameter, which is the signal parameter measured when the non-reference channel sends the correction sequence and the reference channel receives the correction sequence; is the self-correction compensation value of the reference channel. For the RRU corresponding to the reference channel, its self-correction weight is: The correction weight of a channel on the RRU, such as the reference channel, is: The RRU uplink and downlink self-calibration channels corresponding to the reference channel are i1 and m1 respectively, p1 is the reference channel or non-reference channel, L i represents the complex transmission factor from the power divider to the coupling disk, Ti represents the complex transmission factor of the RRU transmission channel, R i It represents the complex transmission factor of the RRU receiving channel. In this case, the correction weight of a certain channel is used as its correction parameter; are non-reference channel correction parameters, which are roughly the same as reference channel correction parameters and are not described in detail here.

[0042] It should be noted that the first correction value calculated in the above situation will align the phases to the phases aligned after the self-calibration of the reference channel: The parameters are all parameters of the RRU where the reference channel is located.

[0043] The second is that neither the reference channel nor the non-reference channel has been self-calibrated:

[0044] More specifically, the first correction value of the non-reference channel is directly calculated according to the correction compensation value and the first parameter. The first correction value can be calculated by the following formula:

[0045]

[0046] Among them, y1 is the first correction value, x 1→2 is the reference channel signal parameter, x 2→1 It is the non-reference channel signal parameter.

[0047] The third is: the reference channel is self-calibrated and the non-reference channel is not self-calibrated:

[0048] More specifically, the self-correction compensation value of the reference channel is obtained, and then the first correction value of the non-reference channel is calculated according to the self-correction channel of the reference channel and the first parameter. The first correction value can be calculated by the following formula:

[0049]

[0050] Among them, y1 is the first correction value, x 1→2 is the reference channel signal parameter, x 2→1 is the non-reference channel signal parameter, It is the self-calibration compensation value of the reference channel.

[0051] It should be noted that in the third case, the reference channel is self-calibrated through the above expression to align all channels on the RRU corresponding to the reference channel to Align the non-reference channel directly to A.

[0052] It should be noted that there is no situation where the reference channel has not undergone self-calibration and the non-reference channel has undergone self-calibration, because when selecting the reference channel, if there are both self-calibrated and non-self-calibrated channels, the reference channel is always selected from the self-calibrated channels first.

[0053] Step 105: Send the first correction value to the corresponding non-reference channel for correction by the non-reference channel.

[0054] Specifically, after receiving the first correction value, the non-reference channel is corrected according to the following expression:

[0055] y=y1·u

[0056] Among them, if the non-reference channel is self-calibrated, then u is the self-calibration compensation value of the RRU corresponding to the non-reference channel, W UL is the uplink self-correction weight of the non-reference channel, W DL is the downlink self-calibration weight of the non-reference channel. According to the path taken by the calibration signal, the loopback signal received by each channel during the downlink self-calibration of the RRU is: i and j are channel subscripts, {i,j}∈[0,Ka-1], ka is the number of RRU antennas, i≠j, R CAL is the complex transmission factor from the power divider outlet to the receiver. Assuming that the self-correction channel selected for downlink self-correction is i, the downlink self-correction weight is: Similarly, according to the path taken by the correction signal, the loopback signal received by each channel during the RRU uplink self-correction is: m and n are channel subscripts, {m,n}∈[0,Ka-1], ka is the number of RRU antennas, m≠n. Uplink self-calibration supports adaptive reference channel selection, and can select the reference channel based on the principle of maximum SINR, T CAL The complex transmission factor from the transmitter to the power divider input. Assuming that the self-correction channel selected for the uplink self-correction is m, the uplink self-correction weight is: If the non-reference channel does not perform self-calibration, u=1.

[0057] Compared with the prior art, the embodiments of the present invention can obtain a joint correction group including multiple cells to be corrected, and then receive the correction parameters reported by the cells to be corrected after the cells to be corrected send correction sequences to each other, and then select the reference cell and the reference channel on the reference cell from the joint correction group according to the correction record table storing the correction parameters, and then after the reference channel and the non-reference channel send correction signals to each other, receive the first parameter reported by the channel, so that the first correction value required for aligning the non-reference channel to the reference channel can be directly calculated according to the first parameter, and finally the first correction value is sent to the corresponding non-reference channel for the non-reference channel correction channel in the cell, thereby performing antenna correction on multiple cells to be corrected in the joint correction group at the same time.

[0058] The second embodiment of the present application relates to a method for calibrating a cell antenna. This embodiment is substantially the same as the first embodiment, except that the selection of a reference cell and a reference channel is refined. The specific process is as follows: Figure 4 As shown:

[0059] Step 401: obtain a joint correction group, where the joint correction group is a set of cells to be corrected.

[0060] Specifically, step 401 in this embodiment is substantially the same as step 101 in the first embodiment, and will not be described in detail here.

[0061] Step 402: receiving the correction parameters reported by the cells to be corrected after mutually sending correction sequences at several different frequencies and updating the correction parameters into the correction record table.

[0062] Specifically, step 402 in this embodiment is substantially the same as step 102 in the first embodiment, and thus will not be described in detail herein.

[0063] Step 404: count the number of successful mutual calibrations of the cells to be calibrated in the joint calibration group according to the calibration record table.

[0064] Specifically, the mutual calibration is successful when two cells to be calibrated successfully receive the calibration sequence sent by the other party and the corresponding calibration parameters in the calibration record table meet the preset first threshold.

[0065] More specifically, the meaning of successful mutual correction between any two cells is that there is at least one certain physical channel in the two cells as the receiving end that can detect the correction signal sent by at least one physical channel of the other cell, and the signal detection result passes all the threshold decision criteria of the air interface correction, and the reverse transmission and reception of the signal also meets the detection pass conditions.

[0066] Step 404: Select a reference radio remote unit RRU according to the number of successful mutual calibrations.

[0067] Step 405: A cell to be calibrated whose mutual calibration success probability is greater than a preset second threshold is selected from the cells to be calibrated corresponding to the reference RRU as a reference cell to be confirmed.

[0068] Specifically, in the cell corresponding to the benchmark RRU, if it is found that the success probability of at least one cell and all other cells exceeds the set second threshold, it indicates that the benchmark cell appears in the correction record table of the offset power, and the correction record table of other power offsets can be used as a reference for increasing the probability of connection or relay connection.

[0069] Step 406: Select a reference cell from the reference cells to be confirmed according to a preset reference cell decision criterion.

[0070] Specifically, the reference cell decision criterion is to first match the cells that have successfully inter-calibrated and sort them according to the number of successes, retain the cells with the highest number of successes, and then select the reference cell from the retained cells based on the principle of detecting a better average signal-to-noise ratio.

[0071] Step 407: If the reference cell is not empty, a channel with the largest receiving / transmitting signal-to-noise ratio is selected as the reference channel on the RRU corresponding to the reference cell.

[0072] Specifically, for cells that do not support self-correction, phase alignment is performed with the same reference channel. Therefore, within each cell, the reference channel needs to be selected according to the reference channel selection algorithm, and the channel with the best signal quality is selected as the reference for the entire mutual correction alignment, and all channels are eventually aligned with the reference channel of the reference cell; for cells that support self-correction, the reference channels of the two cells are unique, and a group of channels with the best transmit and receive signal quality and the largest baseline signal-to-noise ratio need to be selected as the reference channels.

[0073] More specifically, assuming that each cell 1 and cell 2 need to select their own reference channels, then when cell 1 sends a correction sequence, cell 2 receives and detects a set of detection results SINR1_2. When cell 2 sends a correction sequence, cell 1 receives and detects a set of detection results SINR2_1. First, the channel group that failed the correction is eliminated. Then, a group of channels with the best quality of receiving and transmitting signals are selected from all the remaining successfully corrected channels as the reference channels. If there are multiple such channels, the channel number on the reference cell is the smallest, followed by the channel number and value with the smallest value. Find a maximum signal-to-noise ratio result in SINR1_2, and find a maximum signal-to-noise ratio result in SINR2_1. If the two results correspond to the same group of channels, the reference channel is selected. If the two maximum values ​​correspond to different channel groups, the short board optimal criterion is followed, that is, each group of channels receives the minimum signal-to-noise ratio value in all detection results, representing the bottom line capability of the channel group, and then the one with the largest bottom line signal-to-noise ratio is selected as the final reference channel.

[0074] Step 408: Obtain a first parameter in the transceiver process reported after the reference channel and the non-reference channel mutually send a calibration sequence, and calculate a first calibration value for the non-reference channel according to the first parameter.

[0075] Specifically, step 304 in this embodiment is substantially the same as step 104 in the first embodiment, and thus will not be described in detail herein.

[0076] Step 409: Send the first correction value to the corresponding non-reference channel for correction by the non-reference channel.

[0077] Specifically, step 305 in this embodiment is substantially the same as step 105 in the first embodiment, and thus will not be described in detail herein.

[0078] Compared with the prior art, this embodiment, on the basis of the first embodiment, sets various different more specific conditions that are in line with the actual situation to participate in the selection of reference cells and reference channels, so that the cells that can be selected in the shortest time are more reliable, accurate and meet the actual needs of users. Furthermore, through the accuracy of the reference cell, all cell correction results are unified into a reliable result, thereby improving the correction effect and correction success rate.

[0079] The third embodiment of the present application relates to a method for calibrating a cell antenna. This embodiment is substantially the same as the first embodiment, except that the cell that failed to be calibrated in the first embodiment is also calibrated. The specific process is as follows: Figure 5 As shown, including:

[0080] Step 501: obtain a joint correction group, where the joint correction group is a set of cells to be corrected.

[0081] Specifically, step 501 in this embodiment is substantially the same as step 101 in the first embodiment, and will not be described in detail here.

[0082] Step 502: receiving the correction parameters reported by the cell to be corrected after sending correction sequences to each other at several different frequencies and updating the correction parameters into the correction record table.

[0083] Specifically, step 502 in this embodiment is substantially the same as step 102 in the first embodiment, and thus will not be described in detail herein.

[0084] Step 503 : Select a reference cell and a reference channel corresponding to the reference cell in the joint calibration group according to the calibration record table.

[0085] Specifically, step 503 in this embodiment is substantially the same as step 103 in the first embodiment, and thus will not be described in detail herein.

[0086] Step 504: obtain a first parameter in the transceiver process reported after the reference channel and the non-reference channel mutually send a calibration sequence, and calculate a first calibration value of the non-reference channel according to the first parameter.

[0087] Specifically, step 504 in this embodiment is substantially the same as step 105 in the first embodiment, and thus will not be described in detail herein.

[0088] Step 505: Send the first correction value to the corresponding non-reference channel for correction by the non-reference channel.

[0089] Specifically, step 505 in this embodiment is substantially the same as step 105 in the first embodiment, and will not be described in detail here.

[0090] Step 506: Detect whether the mutual calibration between the non-reference cell and the reference cell is successful according to the calibration record table, and obtain the mutual calibration failure cell and the mutual calibration success cell.

[0091] Specifically, mutual calibration is successful when the reference cell successfully receives the calibration sequence sent by the non-reference cell, the non-reference cell successfully receives the calibration sequence sent by the reference cell, and the corresponding calibration parameter in the calibration record table meets the preset first threshold. Based on the above definition of mutual calibration success, the non-reference cell is divided into mutual calibration success cell and calibration failure cell.

[0092] It should be noted that the failure is generally caused by the inability to normally send and receive the calibration sequence with the reference channel.

[0093] Step 507: Select a relay cell and a relay channel from the cells where mutual calibration has succeeded.

[0094] Specifically, the method for selecting the relay cell and the relay channel is substantially the same as the method for selecting the reference cell and the reference channel in the second embodiment, and will not be described in detail here.

[0095] Step 508: Obtain the second parameter in the transmission and reception process reported after the relay channel and the channel corresponding to the mutual correction failed cell send mutual correction sequences and the first correction value of the relay channel.

[0096] Step 509: Calculate a second correction value of the channel corresponding to the mutual correction failed cell according to the second parameter and the first correction value.

[0097] Specifically, similar to the calculation of the first correction value, there are three cases in which the second correction value is calculated:

[0098] The first case is that both the relay channel and the calibration failure channel have been self-calibrated:

[0099]

[0100] Among them, y2 is the second correction value, y1 is the first correction value of the relay channel, and x 3→4 is the relay channel signal parameter, x 4 →3 To correct the failed channel signal parameters, is the correction compensation value of the relay channel self-correction, It is the correction compensation value of the self-calibration of the channel that failed to be calibrated.

[0101] The second situation is that neither the relay channel nor the calibration failure channel has been self-calibrated:

[0102]

[0103] Among them, y2 is the second correction value, y1 is the first correction value of the relay channel, and x 3→4 is the relay channel signal parameter, x 4 →3 It is the signal parameter of the channel that failed to be calibrated.

[0104] The third situation is that the relay channel has been self-calibrated and the calibration failed channel has not been self-calibrated:

[0105]

[0106] Among them, y2 is the second correction value, y1 is the first correction value of the relay channel, and x 3→4 is the relay channel signal parameter, x 4 →3 To correct the failed channel signal parameters, It is the correction compensation value of the relay channel self-calibration.

[0107] It should be noted that the parameters used in the above three situations have substantially the same meanings as the parameters used in the three situations of step 104 in the first embodiment, and are not described in detail here.

[0108] Step 510: Send the second correction value to the corresponding non-reference channel for correction by the non-reference channel.

[0109] Specifically, step 510 in this embodiment is substantially the same as step 105 in the first embodiment, and will not be described in detail here.

[0110] It should be noted that steps 506-509 in this embodiment may also be performed before step 505. In this case, the first correction value and the second correction value may be sent to the corresponding non-reference channel for correction by the non-reference channel.

[0111] Compared with the prior art, this embodiment, based on the first embodiment, can correct the channels that have not been corrected in the first implementation by selecting a relay channel for transmission of correction values, so that more cells can be corrected and the correction effect is improved.

[0112] In order to enable those skilled in the art to more clearly understand the overall process of the cell antenna calibration method disclosed in the first to third embodiments of the present invention, the fourth embodiment of the present invention is described by taking a specific application scenario as an example.

[0113] like Figure 6 As shown, the calibration method of the cell antenna provided by the fourth embodiment of the present invention is applied in Figure 7In the application scenario shown, the three RRUs in the environment each correspond to a cell, can perform self-calibration, RRU1 and RRU2 can well send and receive calibration signals to each other, RRU2 and RRU3 can well send and receive calibration signals to each other, but RRU1 and RRU3 cannot send and receive calibration signals to each other as an example, including:

[0114] Step 601, obtaining a joint calibration group.

[0115] Specifically, there is a joint calibration group in the environment, including cells corresponding to RRU1, RRU2 and RRU3.

[0116] Step 602: Receive a self-calibration compensation value reported by the cell to be calibrated.

[0117] Specifically, RRU1 performs uplink self-correction and obtains RRU1 performs downlink self-calibration and obtains RRU2 performs uplink self-calibration and obtains RRU2 performs downlink self-calibration and obtains RRU3 performs uplink self-calibration and obtains RRU3 performs downlink self-calibration and obtains The 1, 2, and 3 in the superscripts correspond to RRU1, RRU2, and RRU3 respectively, so the self-correction compensation value is

[0118] Step 603: receiving the correction parameters reported by the cells to be corrected after sending the correction sequence to each other and updating the correction parameters into the correction record table.

[0119] Step 604: Select the cell corresponding to RRU1 as the reference cell and the channel p1 on RRU1 as the reference channel in the joint calibration group according to the calibration record table.

[0120] Specifically, the non-reference channels are channel p2, channel q2, and channel p3.

[0121] Step 605 , obtaining a first parameter in the receiving and transmitting process reported after the channel p1 and the non-reference channel mutually send a calibration sequence, and calculating a first correction value of the channel p2 according to the first parameter.

[0122] Specifically,

[0123] Among them, y1 is the first correction value, x 1→2 is the signal parameter of channel p1, x 2→1 is the channel p2 signal parameter, is the correction parameter for channel p1, is the correction parameter of channel p2, and u is the self-correction compensation value of channel p2

[0124] Step 606: Obtain a mutual calibration failure cell list according to the calibration record table, wherein the mutual calibration failure cell list includes channel p3.

[0125] Step 607: Select the cell corresponding to RRU2 as the relay cell and the channel q2 as the relay channel from the non-reference cells in which mutual calibration succeeds.

[0126] Step 608: Acquire the second parameter in the transceiver process reported after the channel q2 and the channel p3 send the calibration sequence to each other and the first calibration value of the channel q2.

[0127] Specifically, since the channel q2 and the channel p2 on the RRU2 are located on the same RRU, they use the same first correction value y1.

[0128] It should be noted that in this embodiment, when selecting channels such as reference access and relay channels, each channel is independent of each other. For example, p2 and q2 are two different channels on the same RRU. However, if a better channel than the channel to be calibrated cannot be found on the RRU corresponding to the relay cell, then p2 and q2 are allowed to be the same channel.

[0129] Step 609: Calculate a second correction value of channel p3 according to the second parameter and the first correction value.

[0130] Specifically, the second correction value is calculated by the following expression:

[0131]

[0132] Among them, y2 is the second correction value, y1 is the first correction value, and x 2→3 is the channel q2 signal parameter, x 3→2 is the channel p3 signal parameter, is the channel q2 correction parameter, Correction parameters for channel p3.

[0133] Step 610, sending the first correction value to channel p2 and channel q2, and sending the second correction value to channel p3 for correction by channel p2, channel q2, and channel p3.

[0134] Compared with the prior art, the embodiments of the present invention can obtain a joint correction group including three cells to be corrected, and then receive the correction parameters reported by the cells to be corrected after the cells to be corrected send correction sequences to each other, and then select the reference cell and the reference channel on the reference cell from the joint correction group according to the correction record table storing the correction parameters, and then after the reference channel and the non-reference channel send correction signals to each other, receive the first parameter reported by the channel, so that the first correction value required for aligning the non-reference channel to the reference channel can be directly calculated according to the first parameter, and finally the first correction value is sent to the corresponding non-reference channel for the non-reference channel correction channel in the cell, thereby performing antenna correction on multiple cells to be corrected in the joint correction group at the same time.

[0135] In addition, it should be understood that the step division of the above methods is only for clear description. When implemented, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs that do not change the core design of the algorithm and process are all within the scope of protection of this patent.

[0136] A fifth embodiment of the present application relates to an electronic device, such as Figure 8 As shown, it includes: at least one processor 801; and a memory 802 that is communicatively connected to the at least one processor 801; wherein the memory 802 stores instructions that can be executed by the at least one processor 801, and the instructions are executed by the at least one processor 801, so that the at least one processor 801 can execute the cell antenna correction method described in any of the above method embodiments.

[0137] The memory 802 and the processor 801 are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors 801 and the memory 802 together. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor 801 is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor 801.

[0138] The processor 801 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management and other control functions. The memory 802 can be used to store data used by the processor 801 when performing operations.

[0139] The sixth embodiment of the present invention relates to a computer-readable storage medium storing a computer program, which implements the above method embodiment when executed by a processor.

[0140] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0141] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A method for calibrating a cell antenna, characterized in that: include: Acquire a joint correction group, wherein the joint correction group is a set of cells to be corrected; receiving correction parameters reported by the cell to be corrected after mutually sending correction sequences at a plurality of different frequencies and updating the correction parameters into a correction record table; Selecting a reference cell and a reference channel corresponding to the reference cell in the joint calibration group according to the calibration record table storing the calibration parameters; Acquire a first parameter in the transceiver process reported after the reference channel and the non-reference channel mutually send a correction sequence, and calculate a first correction value of the non-reference channel according to the first parameter, wherein the first parameter includes a reference channel signal parameter and a non-reference channel signal parameter; The first correction value is sent to the corresponding non-reference channel for correction by the non-reference channel, thereby performing antenna correction on multiple cells to be corrected in the joint correction group at the same time.

2. The method according to claim 1, characterized in that The obtaining of the joint correction group comprises: Obtain the CoMP cell list and the cooperative neighbor relationship between cells; Deleting cells that cannot be jointly calibrated in the cell list according to a preset filtering rule, and obtaining a list of cells to be calibrated; According to the list of cells to be corrected and the collaborative neighbor relationship, n joint correction groups are obtained, wherein n is the number of cells in the list of cells to be corrected, and the joint correction group is a set consisting of a determined cell to be corrected in the list of cells to be corrected and cells having the collaborative neighbor relationship therewith.

3. The method according to claim 1, characterized in that The selecting a reference channel from channels corresponding to the joint calibration group according to the calibration record table includes: Counting the number of successful mutual calibrations of the cells to be calibrated in the joint calibration group according to the calibration record table, wherein the mutual calibration success means that two cells to be calibrated successfully receive the calibration sequence sent by the other party and the corresponding calibration parameter in the calibration record table satisfies a preset first threshold; Selecting a reference remote radio unit RRU according to the number of successful mutual calibrations; Selecting, from the cells to be calibrated corresponding to the reference RRU, the cells to be calibrated whose mutual calibration success probability is greater than a preset second threshold as the reference cells to be confirmed; Selecting the reference cell from the reference cells to be confirmed according to a preset reference cell decision criterion; If the reference cell is not empty, a channel with the largest receiving / transmitting signal-to-noise ratio is selected as the reference channel on the RRU corresponding to the reference cell.

4. The method according to claim 1, characterized in that: After the joint correction group is obtained, the method further includes: receiving a self-correction compensation value reported by the cell to be corrected after self-correction; The first correction value of the non-reference channel is calculated according to the first parameter, and is specifically implemented by the following formula: in, is the first correction value, is the reference channel signal parameter, is the non-reference channel signal parameter, is the self-calibration compensation value corresponding to the reference channel, if the reference channel and the non-reference channel have been self-calibrated, , if the reference channel has been self-calibrated and the non-reference channel has not been self-calibrated, , is the self-correction compensation value corresponding to the non-reference channel.

5. The method according to claim 1, characterized in that: The first parameters include reference channel signal parameters and non-reference channel signal parameters, and the first correction value of the non-reference channel is calculated according to the first parameters, which is specifically implemented by the following formula: in, is the first correction value, is the reference channel signal parameter, is the non-reference channel signal parameter.

6. The method according to any one of claims 1 to 5, characterized in that: Also includes: Detecting whether the mutual calibration between the non-reference cell and the reference cell is successful according to the calibration record table, and obtaining a mutual calibration failure cell and a mutual calibration success cell; Selecting a relay cell and a relay channel from the cells where mutual correction is successful; Acquire a second parameter in a transceiver process reported after a correction sequence is mutually sent between the relay channel and the channel corresponding to the mutual correction failure cell, and the first correction value of the relay channel; Calculate a second correction value of the correction failure channel according to the second parameter and the first correction value, wherein the correction failure channel is the channel corresponding to the mutual correction failure cell; The second correction value is sent to the corresponding non-reference channel for correction by the non-reference channel.

7. The method according to claim 6, characterized in that The selecting a relay cell and a relay channel from the mutual correction successful cells includes: Selecting the relay cell from the mutual correction successful cells for each mutual correction failed cell according to the correction record table; On the RRU corresponding to the relay cell, a channel with the largest receiving / transmitting signal-to-noise ratio is selected as the relay channel.

8. The method according to claim 6, characterized in that If the self-correction compensation value reported by the to-be-corrected cell after self-correction is received after the acquisition of the joint correction group, the second parameter includes a relay channel signal parameter and a correction failure channel signal parameter, and the second correction value of the correction failure channel is calculated according to the second parameter and the first correction value, which is specifically implemented by the following formula: in, is the second correction value, is the first correction value of the relay channel, is the relay channel signal parameter, is the calibration failure channel signal parameter, is the self-calibration compensation value of the relay channel, if the relay channel and the calibration failure channel have been self-calibrated, , if the relay channel has been self-calibrated and the calibration-failed channel has not been self-calibrated, , is the self-calibration compensation value of the calibration failed channel.

9. The method according to claim 6, characterized in that The second parameter includes a relay channel signal parameter and a correction failure channel signal parameter, and the second correction value of the mutual correction failure channel is calculated according to the second parameter and the first correction value, which is specifically implemented by the following formula: in, is the second correction value, is the first correction value of the relay channel, is the relay channel signal parameter, is the calibration failure channel signal parameter.

10. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the cell antenna calibration method according to any one of claims 1 to 9.

11. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the cell antenna calibration method according to any one of claims 1 to 9 is implemented.

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