A method, apparatus, electronic device and medium for identifying terminals under a repeater station

Abstract

This invention provides a method, apparatus, electronic device, and medium for identifying terminals under repeater interference. The method includes: when it is determined that repeater interference exists in a target cell, obtaining the downlink reference signal received power (L1-RSRP) reported by the terminal to be identified in the target cell on different frequency bands; comparing the actual difference in L1-RSRP reported by the terminal to be identified between different frequency bands with a preset theoretical difference in L1-RSRP when there is no repeater interference; if the difference between the actual difference and the theoretical difference exceeds a preset threshold, then determining that the terminal to be identified is within the coverage area of ​​the repeater. This invention solves the problems of existing methods for identifying terminals under repeater interference being overly dependent on the terminal, having low efficiency, and being inaccurate in their judgments.

Description

Technical Field

[0001] This invention relates to the field of mobile communication technology, and in particular to a method, apparatus, electronic device, and medium for identifying terminals under a repeater station. Background Technology

[0002] Currently, methods for identifying terminals under repeaters mainly rely on the reporting of measurement data by the terminals, making judgments through data analysis. For example, determining whether a terminal is under a repeater is based on the difference between the actual road loss and the estimated road loss at the location, using terminal MDT (Minimization Drive Test) data. This method is highly dependent on the terminals, and the current support for terminal MDT reporting capabilities is very low. Therefore, it suffers from excessive reliance on terminals, low work efficiency, and insufficient accuracy in judgment. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the prior art by providing a method, apparatus, electronic device and medium for identifying terminals under repeaters, so as to solve the problems that the existing methods for identifying terminals under repeaters are too dependent on the terminals, have low working efficiency and are not accurate enough.

[0004] In a first aspect, the present invention provides a method for identifying terminals under a repeater station.

[0005] The law includes:

[0006] When it is determined that there is repeater interference in the target cell, the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands is obtained;

[0007] Compare the actual L1-RSRP difference reported by the terminal to be identified between different frequency bands with the preset theoretical L1-RSRP difference when there is no repeater interference;

[0008] If the difference between the actual difference and the theoretical difference exceeds a preset threshold, then it is determined that the terminal to be identified is within the coverage area of ​​the repeater.

[0009] Furthermore, before obtaining the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands when it is determined that there is repeater interference in the target cell, the method further includes:

[0010] Obtain the average noise floor of each Physical Resource Module (PRB) on the base station side corresponding to the target cell;

[0011] Draw the frequency domain waveform based on the average noise floor of the PRB;

[0012] When the frequency domain waveform exhibits a broadband interference waveform, a narrowband spike interference waveform, or a sawtooth waveform, it is determined that the target cell has repeater interference.

[0013] Furthermore, before obtaining the downlink reference signal received power L1-RSRP reported by the target terminal in different frequency bands, the method further includes:

[0014] All base stations co-located with the target cell configure Channel State Information Reference Signal (CSI-RS) resources for the terminal to be identified, so that the terminal to be identified measures the CSI-RS and calculates the required Channel State Information (CSI), wherein the CSI includes the L1-RSRP;

[0015] All base stations sharing the same site with the target cell receive the CSI report sent by the terminal to be identified, and the CSI report includes the CSI.

[0016] Furthermore, before comparing the actual L1-RSRP difference reported by the terminal to be identified across different frequency bands with the preset theoretical L1-RSRP difference when there is no repeater interference, the method further includes:

[0017] Calculate the theoretical L1-RSRP difference of the terminal to be identified in different frequency bands when there is no repeater interference.

[0018] Furthermore, before calculating the theoretical L1-RSRP difference of the terminal to be identified between different frequency bands in the absence of repeater interference, the method further includes:

[0019] Calculate the path loss in the area where the corresponding base station is located based on the propagation model corresponding to each frequency band;

[0020] The L1-RSRP for different frequency bands is calculated by combining the path loss and the first formula.

[0021] Furthermore, when the frequency band is 150MHz-1500MHz, the propagation model adopts the Okumura-Hata model;

[0022] When the frequency band is 1500MHz-2000MHz, the propagation model adopts the COST-231Hata model.

[0023] Furthermore, the first formula is:

[0024] L1-RSRP=P+Gt+Gr-L

[0025] Wherein, L1-RSRP is the downlink reference signal received power, P is the CSI-RS transmit power, Gt is the base station transmit gain, Gr is the receiver gain of the terminal to be identified, and L is the path loss.

[0026] In a second aspect, the present invention provides a device for identifying terminals under a repeater station, comprising:

[0027] The first acquisition module is used to acquire the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands when it is determined that there is repeater interference in the target cell;

[0028] The comparison module, connected to the first acquisition module, is used to compare the actual L1-RSRP difference reported by the terminal to be identified between different frequency bands with the preset theoretical L1-RSRP difference when there is no repeater interference.

[0029] The judgment module, connected to the comparison module, is used to determine that the terminal to be identified is within the coverage area of ​​the repeater if the difference between the actual difference and the theoretical difference exceeds a preset threshold.

[0030] Thirdly, the present invention provides an electronic device, the device comprising: a processor, and a memory coupled to the processor; the memory storing a program for a method of identifying a terminal under a repeater station that can be run on the processor, wherein when the program for the method of identifying a terminal under a repeater station is executed by the processor, the steps of the method for identifying a terminal under a repeater station described in the first aspect are implemented.

[0031] Fourthly, the present invention provides a computer storage medium storing a program for a method of identifying a terminal under a repeater station, wherein when the program for the method of identifying a terminal under a repeater station is executed by a processor, the steps of the method for identifying a terminal under a repeater station described in the first aspect are implemented.

[0032] This invention provides a method, apparatus, electronic device, and medium for identifying terminals under a repeater. When it is determined that there is repeater interference in a target cell, the downlink reference signal received power (L1-RSRP) reported by the terminal to be identified in the target cell on different frequency bands is obtained. Then, the actual difference of L1-RSRP reported by the terminal to be identified between different frequency bands is compared with the preset theoretical difference of L1-RSRP when there is no repeater interference. If the difference between the actual difference and the theoretical difference exceeds a preset threshold, it is determined that the terminal to be identified is within the coverage area of ​​the repeater. When repeater interference is detected in a target cell, this invention first acquires the L1-RSRP reported by the terminal to be identified across different frequency bands. Then, it determines whether the terminal is within the repeater's coverage area by comparing the actual difference between the actual and theoretical differences in L1-RSRP across different frequency bands. Since the L1-RSRP of one frequency band increases when the terminal is under a repeater, the actual difference in L1-RSRP between different frequency bands changes accordingly. Therefore, determining whether the terminal is under a repeater based on the difference between the actual and theoretical L1-RSRP improves the accuracy of identification and has low dependence on the terminal, thus increasing work efficiency. This solves the problems of existing methods for identifying terminals under repeaters being overly dependent on the terminal, having low efficiency, and insufficient accuracy. Attached Figure Description

[0033] Figure 1 This is a flowchart of a method for identifying terminals under a repeater station according to Embodiment 1 of the present invention;

[0034] Figure 2 This is a frequency domain waveform diagram of broadband interference in a repeater station according to Embodiment 1 of the present invention;

[0035] Figure 3 This is a frequency domain waveform diagram of narrowband spike interference in a repeater station according to Embodiment 1 of the present invention;

[0036] Figure 4 This is a frequency domain waveform diagram of the sawtooth wave noise floor in Embodiment 1 of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of a device for identifying a terminal under a repeater station according to Embodiment 2 of the present invention;

[0038] Figure 6 This is a schematic diagram of the structure of an electronic device according to Embodiment 3 of the present invention. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solution of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] It is understood that the specific embodiments and accompanying drawings described herein are merely for explaining the invention and are not intended to limit the invention.

[0041] It is understood that, without conflict, the various embodiments and features in the embodiments of the present invention can be combined with each other.

[0042] It is understood that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, while the parts unrelated to the present invention are not shown in the drawings.

[0043] It is understood that each unit or module involved in the embodiments of the present invention may correspond to only one entity structure, or may be composed of multiple entity structures, or multiple units or modules may be integrated into one entity structure.

[0044] It is understood that the terms "first," "second," etc., in the embodiments of the present invention are used to distinguish different objects or to distinguish different treatments of the same object, rather than to describe a specific order of objects.

[0045] It is understood that, without conflict, the functions and steps marked in the flowcharts and block diagrams of this invention may occur in a different order than that marked in the accompanying drawings.

[0046] It is understood that the flowcharts and block diagrams of this invention illustrate the possible architecture, functions, and operations of systems, apparatuses, devices, and methods according to various embodiments of this invention. Each block in the flowchart or block diagram may represent a unit, module, program segment, or code, containing executable instructions for implementing the specified function. Furthermore, each block or combination of blocks in the block diagram and flowchart can be implemented using a hardware-based system to achieve the specified function, or using a combination of hardware and computer instructions.

[0047] It is understood that the units and modules involved in the embodiments of the present invention can be implemented by software or by hardware. For example, the units and modules can be located in a processor.

[0048] Application Overview

[0049] Even after refarming from LTE to NR, low-frequency networks (800M / 900M) still face severe external interference, especially from privately installed repeaters. The performance of these inexpensive repeaters purchased by users often fails to meet requirements, and severe interference directly impacts user experience, such as reduced uplink speeds, increased dropout rates, and lower RRC establishment success rates. Therefore, it's necessary to identify, locate, and eliminate the interference. Currently, relying solely on information between base stations is insufficient to accurately pinpoint the location of interference, as the number and location of multiple repeater interference sources within a base station's coverage area cannot be identified. Therefore, it's necessary to combine terminal-side information. Since repeaters are typically installed by end users based on coverage needs, and user locations within the repeater's coverage area are close to the repeater's location, the repeater's location can be determined based on the terminal's location. Therefore, the first problem to solve when using terminal-side location information to locate repeaters is determining whether the terminal is within the repeater's coverage area.

[0050] Currently, methods for identifying terminals under repeaters mainly rely on the reporting of measurement data by the terminals, and make judgments through data analysis. Another method is to determine whether a terminal is under a repeater based on the difference between the actual path loss and the estimated path loss at the location, using the terminal's MDT data. This method is highly dependent on the terminal, and the current support for terminal MDT reporting capabilities is very low. Therefore, it suffers from excessive reliance on terminals, low work efficiency, and inaccurate judgments.

[0051] To address the aforementioned issues, this application proposes a method, apparatus, electronic device, and medium for identifying terminals under a repeater. First, the L1-RSRP reported by the terminal to be identified across different frequency bands is acquired. Then, the difference between the actual L1-RSRP difference and the theoretical L1-RSRP difference between the terminal under identification across different frequency bands is compared to determine whether the difference exceeds a preset threshold. Since the L1-RSRP of one frequency band increases when the terminal is under a repeater, the actual L1-RSRP difference between different frequency bands will change accordingly. Therefore, determining whether the terminal is under a repeater based on the difference between the actual and theoretical L1-RSRP difference improves the accuracy of identification and judgment, has low dependence on the terminal, and improves work efficiency.

[0052] After introducing the basic principles of this application, various non-limiting embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0053] Example 1:

[0054] This embodiment provides a method for identifying terminals under a repeater station, such as... Figure 1 As shown, the method includes:

[0055] Step S101: When it is determined that there is repeater interference in the target cell, obtain the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands;

[0056] In this embodiment, the terminal to be identified is the terminal that needs to be identified as being under a repeater station. Different frequency bands can be, for example, 900MHz, 1800MHz, 2100MHz, etc.

[0057] Specifically, when it is determined that there is repeater interference in the target cell, the base station obtains the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands.

[0058] Optionally, before obtaining the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands when it is determined that there is repeater interference in the target cell, the method further includes:

[0059] The average noise floor of each physical resource module (PRB) on the base station side corresponding to the target cell is obtained. A frequency domain waveform is plotted based on the average noise floor of the PRB. When the frequency domain waveform shows a broadband interference waveform, a narrowband spike interference waveform, or a sawtooth waveform, it is determined that the target cell has repeater interference.

[0060] In this embodiment, the average noise floor of the acquired PRBs can be determined based on the bandwidth. When plotting the frequency domain waveform of the noise floor, a 1-hour interval can be selected as the granularity of the average noise floor, with the vertical axis representing the bandwidth and the horizontal axis representing the average noise floor of 1 to N PRBs. When the bandwidth is 5MHz, the average noise floor of 24 PRBs is collected; when the bandwidth is 10MHz, the average noise floor of 51 PRBs is collected; and when the bandwidth is 20MHz, the average noise floor of 105 PRBs is collected. The frequency domain waveforms of the broadband interference waveform, the narrowband spike interference waveform, and the sawtooth waveform are shown below. Figure 2-4 As shown. Figure 2 This is a frequency domain waveform diagram of broadband interference from repeaters; Figure 3 This is the frequency domain waveform diagram of narrowband spike interference from a repeater; Figure 4This is a frequency domain waveform diagram of repeater interference exhibiting a sawtooth pattern in the frequency domain. When the frequency domain waveform of the plotted noise floor matches any of the three types of repeater interference frequency domain waveforms mentioned above, it can be confirmed as repeater-type interference. In the frequency domain waveform diagram, the vertical axis represents bandwidth, and the horizontal axis represents the average noise floor (PRB). The frequency domain waveform diagrams of various repeater interferences have their own characteristics. For broadband repeater interference, the waveform is relatively stable, and the noise floor is raised across the entire bandwidth. For narrowband repeater spike interference, due to the aging of some repeaters, the interference is unrelated to external signals and occurs upon power-on. The PRB position of the spike from the same interference source is relatively fixed, while the PRB position of spikes from different interference sources may differ. For repeater interference exhibiting a sawtooth pattern in the frequency domain, the variance of the noise floor across the entire bandwidth is not large, with the maximum difference in RB-level noise floor levels being approximately 7 dB.

[0061] Optionally, before obtaining the downlink reference signal received power L1-RSRP reported by the target terminal in different frequency bands, the method further includes:

[0062] All base stations co-located with the target cell configure CSI-RS (Channel State Information Reference Signal) resources for the terminal to be identified, so that the terminal to be identified can measure the CSI-RS and calculate the required CSI (Channel State Information), wherein the CSI includes the L1-RSRP;

[0063] All base stations sharing the same site with the target cell receive the CSI report sent by the terminal to be identified, and the CSI report includes the CSI.

[0064] In this embodiment, the base station may include, for example, a 4G base station and a 5G base station. The 4G base station or 5G base station co-located with the target cell respectively configures CSI-RS resources for the terminal to be identified. The terminal to be identified measures the CSI-RS resources and calculates the required CSI. The terminal to be identified reports a CSI report through PUCCH (Physical Uplink Control Channel) or PUSCH (Physical Uplink Shared Channel). The CSI report includes the CSI, which specifically includes information such as CQI (Channel Quality Indicator), RI (Rank Indicator), LI (Layer Indicator), PMI (Precoding Matrix Indicator), and L1-RSRP (Downlink Reference Signal Received Power).

[0065] Step S102: Compare the actual L1-RSRP difference reported by the terminal to be identified between different frequency bands with the preset theoretical L1-RSRP difference when there is no repeater interference;

[0066] Step S103: If the difference between the actual difference and the theoretical difference exceeds a preset threshold, then it is determined that the terminal to be identified is within the coverage area of ​​the repeater.

[0067] Specifically, the theoretical L1-RSRP difference of the terminal to be identified between different frequency bands can be calculated first when there is no repeater interference. The actual L1-RSRP difference reported by the terminal to be identified between different frequency bands is then compared with the theoretical L1-RSRP difference when there is no repeater interference. The difference between the actual L1-RSRP difference and the theoretical L1-RSRP difference between every two frequency bands is calculated. Then, a discrimination threshold is set based on the frequency band where the terminal signal is located. If the difference between the actual difference and the theoretical difference exceeds a preset threshold, the terminal to be identified is determined to be within the coverage area of ​​the repeater.

[0068] Optionally, before calculating the theoretical L1-RSRP difference of the terminal to be identified between different frequency bands in the absence of repeater interference, the method further includes:

[0069] Calculate the path loss in the area where the corresponding base station is located based on the propagation model corresponding to each frequency band;

[0070] The theoretical difference of L1-RSRP between different frequency bands is calculated by combining the path loss and the first formula.

[0071] Specifically, when the frequency band is 150MHz-1500MHz, the propagation model adopts the Okumura-Hata model; when the frequency band is 1500MHz-2000MHz, the propagation model adopts the COST-231Hata model.

[0072] Specifically, the first formula is:

[0073] L1-RSRP=P+Gt+Gr-L

[0074] Wherein, L1-RSRP is the downlink reference signal received power, P is the CSI-RS transmit power, Gt is the base station transmit gain, Gr is the receiver gain of the terminal to be identified, and L is the path loss.

[0075] In this step, the downlink reference signal received power consists of four parts: the CSI-RS transmit power (denoted by P), the base station transmit gain (denoted by Gt), the receiver gain of the terminal to be identified (denoted by Gr), and the path loss (denoted by L). The downlink reference signal received power (denoted by L1-RSRP) is: L1-RSRP=P+Gt+Gr-L, where P can be obtained from the cell parameters, Gt is the base station transmit gain, which is related to the number of channels K used for transmission and can be obtained from the base station side, Gr is the terminal receiver gain, which is determined by the number of terminal antennas and the azimuth between the terminal and the base station. It is consistent for different frequency bands and can be canceled out in the difference calculation, and L is the path loss, which can be calculated according to the frequency band selection propagation model.

[0076] Specifically, taking 900MHz as an example, when repeaters are not used in the low-frequency 900MHz band, and the transmit power P and transmit gain Gt of cells in different frequency bands are the same, the path loss of the corresponding cell is calculated using the Okumura-Hata model:

[0077] L=69.55+26.16lgf-13.82lg(ht)-a(hm)+[44.9-6.55lg(ht)]lgd

[0078] Where f is the operating frequency band, in MHz;

[0079] ht represents the effective height of the base station antenna, typically 30–200 meters.

[0080] hm is the height of the mobile station antenna, which is generally 1 to 10 meters;

[0081] d represents the communication distance, ranging from 1 to 35 km;

[0082] a(hm) is the mobile station antenna height correction factor, calculated as follows:

[0083]

[0084] L represents the path loss (the median basic propagation loss in urban areas); corrections are needed for other scenarios. Suburban scenarios are corrected using KMR.

[0085] Open rural scenes were corrected using Ru.

[0086] Ru = -4.78 × lg 2 (f)+18.33×lg(f)-40.94.

[0087] It should be noted that, in addition to path loss, if it is an indoor terminal, the penetration loss can also be considered, as well as the difference in penetration loss between different frequency bands.

[0088] Preferably, the discrimination threshold can be set comprehensively based on the frequency band and region of the signal of the terminal to be identified, as well as the differences in penetration loss between different frequency bands and different materials.

[0089] In this embodiment, when repeater interference is detected in the target cell, the downlink reference signal received power (L1-RSRP) reported by the terminal to be identified in the target cell on different frequency bands is obtained. The actual difference in L1-RSRP reported by the terminal to be identified between different frequency bands is compared with the preset theoretical difference in L1-RSRP when there is no repeater interference. If the difference between the actual difference and the theoretical difference exceeds a preset threshold, it is determined whether the terminal to be identified is within the coverage area of ​​the repeater. This reduces the dependence on the terminal and improves work efficiency and identification accuracy.

[0090] In a specific embodiment, taking the identification of a terminal under an NR / LTE 900MHz repeater as an example, when the transmit power P and transmit gain Gt of cells in different frequency bands are the same, the method for identifying a terminal under a repeater may include the following steps:

[0091] (1) Perform routine monitoring of the noise floor on the base station side within the cell, collect the average noise floor of each PRB, and plot the frequency domain waveform of the noise floor. It is preferred to use 1 hour as the granularity of the noise floor analysis. The horizontal axis of the frequency domain waveform is the 0th to Nth PRB. When the bandwidth is 5MHz, N is 24; when the bandwidth is 10MHz, N is 51; when the bandwidth is 20MHz, N is 105. When the frequency domain waveform of the noise floor is a broadband interference waveform, or a narrowband spike interference waveform, or a sawtooth waveform, it can be identified as repeater interference, and the corresponding cell is the target cell.

[0092] (2) Once it is confirmed that there is repeater interference in the target cell, collaborative measurement and analysis between the base station and the terminal are performed, including measurements of the serving cell and co-located inter-frequency cells. The CSI measurement and reporting process is as follows: First, the 5G base station gNB or the 4G base station eNB configures appropriate CSI-RS resources for the terminal. Then, the terminal measures the CSI-RS and calculates the required CSI (CQI, RI, LI, PMI, L1-RSRP, etc.). Finally, all base stations co-located with the cell configure the terminal to report the CSI report to the gNB or eNB through the physical uplink control channel PUCCH or the physical uplink shared channel PUSCH.

[0093] (3) Analyze the measurement reports reported by the terminal, compare the differences in L1-RSRP for different frequency bands of the co-located cell, and determine whether a repeater is used in the low frequency range based on whether the difference between the actual L1-RSRP difference and the theoretical L1-RSRP difference exceeds a preset threshold. When a repeater is found to exist in the NR / LTE 900MHz cell after preliminary noise floor analysis, other co-located frequency band cells, such as LTE 1800MHz and LTE 2100MHz cells, will not be interfered with.

[0094] Specifically, the theoretical difference in L1-RSRP between different frequency bands of the terminal to be identified can be calculated using the formula L1-RSRP = P + Gt + Gr-L, where P is the transmit power of the base station when transmitting CSI-RS, Gt is the transmit gain of the base station, which is related to the number of channels K used for transmission, and both can be obtained from the base station. Gr is the receive gain of the terminal, and this value is consistent across different frequency bands for the same terminal.

[0095] Specifically, when calculating the path loss L, a 3GPP outdoor propagation model can be selected according to the frequency band. When the frequency band is 150MHz-1500MHz, the propagation model adopts the Okumura-Hata model, and when the frequency band is 1500MHz-2000MHz, the propagation model adopts the COST-231Hata model.

[0096] When the frequency band is 150MHz-1500MHz, the Okumura-Hata model is used:

[0097] L=69.55+26.16lgf-13.82lg(ht)-a(hm)+[44.9-6.55lg(ht)]lgd

[0098] Where f is the operating frequency band, in MHz;

[0099] ht represents the effective height of the base station antenna, typically 30–200 meters.

[0100] hm is the height of the mobile station antenna, which is generally 1 to 10 meters;

[0101] d represents the communication distance, ranging from 1 to 35 km;

[0102] a(hm) is the mobile station antenna height correction factor, calculated as follows:

[0103]

[0104] L represents the path loss (the median basic propagation loss in urban areas); corrections are needed for other scenarios. Suburban scenarios are corrected using KMR.

[0105] Open rural scenes were corrected using Ru.

[0106] Ru = -4.78 × lg 2 (f)+18.33×lg(f)-40.94

[0107] When the frequency band is 1500MHz-2000MHz, the COST-231Hata model is used:

[0108] L=46.33+33.9lgf-13.82lg(ht)-a(hm)+[44.9-6.55lg(ht)]lgd+Cm

[0109] Other parameters are the same as those in the Okumura-Hata model, where L is the path loss (the median of basic propagation loss in urban areas), and Cm is used to correct for other scenarios. The calculation formula is as follows.

[0110]

[0111] Optionally, the preset threshold can be set based on the frequency band of the terminal signal, the region, and the penetration loss of the terminal signal in different materials. If a repeater is used in the low frequency 900MHz, the gain is generally in the tens of dB, and the difference between other frequency bands and 900MHz will be significantly increased. At this time, it can be determined that the terminal is within the coverage area of ​​the repeater.

[0112] The following lists the downlink received signals when antennas P and Gt are the same for different frequency bands, without using repeaters: 900MHz using the Okumura-Hata model, and 1800MHz and 2100MHz using the COST-231Hata model.

[0113] Table 1: Frequency Band-Downlink Received Signal Comparison Table

[0114]

[0115] Considering the penetration loss of indoor terminals and the differences in penetration loss between different frequency bands, Table 2 is a statistical table of penetration loss test results for 900MHz and 1800MHz in different materials. The penetration loss of 2100MHz and 1800MHz is theoretically close.

[0116] Table 2: Statistical Table of Penetration Loss for Different Materials

[0117]

[0118] Optionally, when none of the cells in the three frequency bands of the shared base station have repeaters, the measurement results reported by the terminal can be statistically analyzed to derive a threshold. The average difference between the L1-RSRP of 900MHz and L1-RSRP of 1800MHz for each terminal, and half of the average difference between the L1-RSRP of 900MHz and L1-RSRP of 2100MHz for each terminal are calculated. A reasonable threshold is set based on these two averages to determine whether the terminal is within the coverage area of ​​the repeater.

[0119] This invention provides a method for identifying terminals under a repeater. When it is determined that there is repeater interference in a target cell, the method obtains the downlink reference signal received power (L1-RSRP) reported by the terminal to be identified in the target cell on different frequency bands. Then, it compares the actual difference of L1-RSRP reported by the terminal to be identified between different frequency bands with the preset theoretical difference of L1-RSRP when there is no repeater interference. If the difference between the actual difference and the theoretical difference exceeds a preset threshold, it is determined that the terminal to be identified is within the coverage area of ​​the repeater. When repeater interference is detected in a target cell, this invention first acquires the L1-RSRP reported by the terminal to be identified across different frequency bands. Then, it determines whether the terminal is within the repeater's coverage area by comparing the actual difference between the actual and theoretical differences in L1-RSRP across different frequency bands. Since the L1-RSRP of one frequency band increases when the terminal is under a repeater, the actual difference in L1-RSRP between different frequency bands changes accordingly. Therefore, determining whether the terminal is under a repeater based on the difference between the actual and theoretical L1-RSRP improves the accuracy of identification and has low dependence on the terminal, thus increasing work efficiency. This solves the problems of existing methods for identifying terminals under repeaters, which are overly dependent on the terminal, have low efficiency, and are not accurate enough.

[0120] Example 2:

[0121] like Figure 5 As shown, this embodiment provides an apparatus for identifying terminals under a repeater, used to perform the above-described method for identifying terminals under a repeater, including:

[0122] The first acquisition module 501 is used to acquire the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands when it is determined that there is repeater interference in the target cell;

[0123] The comparison module 502 is connected to the first acquisition module 501 and is used to compare the actual L1-RSRP difference reported by the terminal to be identified between different frequency bands with the preset theoretical L1-RSRP difference when there is no repeater interference.

[0124] The judgment module 503, connected to the comparison module 502, is used to determine that the terminal to be identified is within the coverage area of ​​the repeater if the difference between the actual difference and the theoretical difference exceeds a preset threshold.

[0125] Optionally, the device further includes:

[0126] The second acquisition module is used to acquire the average noise floor of each physical resource module (PRB) on the base station side corresponding to the target cell.

[0127] A plotting module is used to plot a frequency domain waveform based on the average noise floor of the PRB.

[0128] The determination module is used to determine that there is repeater interference in the target cell when the frequency domain waveform is a broadband interference waveform, a narrowband spike interference waveform, or a sawtooth waveform.

[0129] Optionally, the device further includes:

[0130] The configuration module is used to configure Channel State Information Reference Signal (CSI-RS) resources for the terminal to be identified by all base stations co-located with the target cell, so that the terminal to be identified can measure the CSI-RS and calculate the required Channel State Information (CSI), wherein the CSI includes the L1-RSRP;

[0131] The receiving module is configured to receive the CSI report sent by the terminal to be identified from all base stations co-located with the target cell, wherein the CSI report includes the CSI.

[0132] Optionally, the device further includes:

[0133] The first calculation module is used to calculate the theoretical L1-RSRP difference of the terminal to be identified in different frequency bands when there is no repeater interference.

[0134] Optionally, the device further includes:

[0135] The second calculation module is used to calculate the path loss of the area where the corresponding base station is located based on the propagation model corresponding to each frequency band.

[0136] The third calculation module is used to calculate the L1-RSRP for different frequency bands by combining the path loss and the first formula.

[0137] Optionally, when the frequency band is 150MHz-1500MHz, the propagation model adopts the Okumura-Hata model;

[0138] When the frequency band is 1500MHz-2000MHz, the propagation model adopts the COST-231Hata model.

[0139] Optionally, the first formula is:

[0140] L1-RSRP=P+Gt+Gr-L

[0141] Wherein, L1-RSRP is the downlink reference signal received power, P is the CSI-RS transmit power, Gt is the base station transmit gain, Gr is the receiver gain of the terminal to be identified, and L is the path loss.

[0142] For ease of description, the above devices are described in terms of function, divided into various modules. Of course, in implementing this application, the functions of each module can be implemented in one or more software and / or hardware.

[0143] The apparatus described above is used to implement the method for identifying the terminal under the repeater station in response to any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0144] Example 3:

[0145] refer to Figure 6 This embodiment provides an electronic device, including: a processor 601, and a memory 602 coupled to the processor 601; the memory 602 stores a program for a method of identifying a terminal under a repeater station, which can be run on the processor 601. When the program for identifying a terminal under a repeater station is executed by the processor 601, it implements the steps of the method for identifying a terminal under a repeater station as described in any of the foregoing embodiments. Although the above device only shows the processor 601 and the memory 602, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above device may only include the components necessary for implementing the embodiments of the specification, and does not necessarily include all the components shown in the figures.

[0146] Example 4:

[0147] This embodiment provides a computer storage medium storing a program for identifying a terminal under a repeater station. When the program for identifying a terminal under a repeater station is executed by a processor, it implements the steps of the method for identifying a terminal under a repeater station in Embodiment 1 above.

[0148] The computer 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). Computer storage media 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 (CompactDisc Read-Only Memory), DVD or other optical disc storage, cartridges, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer.

[0149] In summary, the present invention provides a method, apparatus, electronic device, and medium for identifying terminals under a repeater. When it is determined that there is repeater interference in a target cell, the downlink reference signal received power (L1-RSRP) reported by the terminal to be identified in the target cell on different frequency bands is obtained. Then, the actual difference of L1-RSRP reported by the terminal to be identified between different frequency bands is compared with the preset theoretical difference of L1-RSRP when there is no repeater interference. If the difference between the actual difference and the theoretical difference exceeds a preset threshold, it is determined that the terminal to be identified is within the coverage area of ​​the repeater. When repeater interference is detected in a target cell, this invention first acquires the L1-RSRP reported by the terminal to be identified across different frequency bands. Then, it determines whether the terminal is within the repeater's coverage area by comparing the actual difference between the actual and theoretical differences in L1-RSRP across different frequency bands. Since the L1-RSRP of one frequency band increases when the terminal is under a repeater, the actual difference in L1-RSRP between different frequency bands changes accordingly. Therefore, determining whether the terminal is under a repeater based on the difference between the actual and theoretical L1-RSRP improves the accuracy of identification and has low dependence on the terminal, thus increasing work efficiency. This solves the problems of existing methods for identifying terminals under repeaters being overly dependent on the terminal, having low efficiency, and insufficient accuracy.

[0150] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for identifying terminals under a repeater station, characterized in that, The method includes: When it is determined that there is repeater interference in the target cell, the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands is obtained, wherein the L1-RSRP is a parameter in the channel state information (CSI). Compare the actual L1-RSRP difference reported by the terminal to be identified between different frequency bands with the preset theoretical L1-RSRP difference when there is no repeater interference; If the difference between the actual difference and the theoretical difference exceeds a preset threshold, it is determined that the terminal to be identified is within the coverage area of ​​the repeater. The threshold is set comprehensively based on the frequency band, region, and differences in penetration loss between different frequency bands and different materials of the signal of the terminal to be identified.

2. The method according to claim 1, characterized in that, Before obtaining the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands when it is determined that there is repeater interference in the target cell, the method further includes: Obtain the average noise floor of each Physical Resource Module (PRB) on the base station side corresponding to the target cell; Draw the frequency domain waveform based on the average noise floor of the PRB; When the frequency domain waveform exhibits a broadband interference waveform, a narrowband spike interference waveform, or a sawtooth waveform, it is determined that the target cell has repeater interference.

3. The method according to claim 1, characterized in that, Before obtaining the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands, the method further includes: All base stations co-located with the target cell configure Channel State Information Reference Signal (CSI-RS) resources for the terminal to be identified, so that the terminal to be identified measures the CSI-RS and calculates the required Channel State Information (CSI), wherein the CSI includes the L1-RSRP; All base stations sharing the same site with the target cell receive the CSI report sent by the terminal to be identified, and the CSI report includes the CSI.

4. The method according to claim 3, characterized in that, Before comparing the actual L1-RSRP difference reported by the terminal to be identified between different frequency bands with the preset theoretical L1-RSRP difference when there is no repeater interference, the method further includes: Calculate the theoretical L1-RSRP difference of the terminal to be identified in different frequency bands when there is no repeater interference.

5. The method according to claim 4, characterized in that, Before calculating the theoretical L1-RSRP difference of the terminal to be identified between different frequency bands in the absence of repeater interference, the method further includes: Calculate the path loss in the area where the corresponding base station is located based on the propagation model corresponding to each frequency band; The L1-RSRP for different frequency bands is calculated by combining the path loss and the first formula.

6. The method according to claim 5, characterized in that, When the frequency band is 150MHz-1500MHz, the propagation model adopts the Okumura-Hata model; When the frequency band is 1500MHz-2000MHz, the propagation model adopts the COST-231 Hata model.

7. The method according to claim 5, characterized in that, The first formula is: Wherein, L1-RSRP is the downlink reference signal received power, P is the CSI-RS transmit power, Gt is the base station transmit gain, Gr is the receiver gain of the terminal to be identified, and L is the path loss.

8. A device for identifying terminals under a repeater station, characterized in that, include: The first acquisition module is used to acquire the downlink reference signal received power L1-RSRP reported by the terminal to be identified in the target cell on different frequency bands when it is determined that there is repeater interference in the target cell. The L1-RSRP is a parameter in the channel state information (CSI). The comparison module, connected to the acquisition module, is used to compare the actual L1-RSRP difference reported by the terminal to be identified between different frequency bands with the preset theoretical L1-RSRP difference when there is no repeater interference. The judgment module, connected to the comparison module, is used to determine that the terminal to be identified is within the coverage area of ​​the repeater if the difference between the actual difference and the theoretical difference exceeds a preset threshold. The threshold is set comprehensively based on the frequency band, region, and differences in penetration loss between different frequency bands and different materials of the signal of the terminal to be identified.

9. An electronic device, characterized in that, The device includes: a processor, and a memory coupled to the processor; the memory stores a program for a method of identifying a terminal under a repeater that can run on the processor, wherein when the program for the method of identifying a terminal under a repeater is executed by the processor, the method implements the steps of the method of identifying a terminal under a repeater as described in any one of claims 1-7.

10. A computer storage medium, characterized in that, The program stores a method for identifying a terminal under a repeater, which, when executed by a processor, implements the steps of the method for identifying a terminal under a repeater as described in any one of claims 1-7.

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