Method and device for locating faults in multi-network combining equipment

Abstract

The present application discloses a method and device for locating faults in a multi-network combining device. The method includes: configuring inter-frequency point measurement for a user equipment in a designated serving cell; initiating periodic inter-frequency point measurement to instruct the user equipment in the serving cell to perform periodic inter-frequency point measurement according to the configured inter-frequency point measurement; receiving an inter-frequency measurement report of the periodic inter-frequency point measurement from the user equipment, the inter-frequency measurement report including an inter-frequency point number, a serving cell reference signal received power, and an inter-frequency point reference signal received power; and determining, based on the inter-frequency measurement report, whether a multi-network access point device port corresponding to each inter-frequency point in the multi-network combining device has a fault.

Description

Technical Field

[0001] The present application relates to mobile communication networks, and more particularly to a method and device for locating faults in multi-network combining devices based on heterodyne frequency measurement and AI (Artificial Intelligence) algorithms. Background Art

[0002] Mobile communication networks are built by various operators using multiple standards and multiple frequency bands to provide wireless signal coverage to their corresponding subscriber user equipment (UE). Providing wireless signal coverage to densely populated locations such as subways, shopping malls, and large venues involves a variety of network planning and optimization issues, such as limited space for indoor distributed system construction, strong interference between systems, and frequent handoffs caused by poor coverage of multiple systems. To address these network planning and optimization issues, the industry has developed a POI (Point of Interface) networking device for combining multiple operator networks. This POI networking device supports ultra-wideband combining technology, enabling the combining of signals from multiple operators' multiple standards and multiple frequency bands, allowing multiple networks from different operators to share antenna feed systems to provide wireless signal coverage. This POI combining technology has been widely used in various indoor coverage scenarios with high business demands, offering flexible network construction and low investment in distributed system construction.

[0003] Since POI combining technology is introduced to combine multiple standards and multi-band networks of different operators, equipment failures in the multi-network combining equipment, such as hardware connection failures and POI electrical performance, will have a significant impact on the antenna port output power of the distributed antenna feed system.

[0004] Currently, faults in multi-network combining equipment that cause poor network coverage are typically located through on-site troubleshooting by maintenance personnel, on-site coverage testing, network performance analysis, and user complaints from the corresponding area. These fault location methods have limited accuracy, require on-site maintenance personnel, and take a long time to locate. Furthermore, because multi-network combining equipment involves multiple networks from different operators, field testing requires test terminals that support all network frequency bands and standards of all operators, resulting in high costs for obtaining test data. Summary of the Invention

[0005] In order to solve or at least alleviate one or more of the aforementioned problems, the following technical solutions are provided.

[0006] According to a first aspect of the present application, a method for locating a fault in a multi-network combining device is provided. The method includes: configuring inter-frequency point measurement for a user equipment in a designated serving cell; initiating periodic inter-frequency point measurement to instruct the user equipment in the serving cell to perform periodic inter-frequency point measurement according to the configured inter-frequency point measurement; receiving an inter-frequency measurement report of the periodic inter-frequency point measurement from the user equipment, wherein the inter-frequency measurement report includes an inter-frequency point number, a serving cell reference signal received power, and an inter-frequency point reference signal received power; and determining, based on the inter-frequency measurement report, whether a multi-network access point device port corresponding to each inter-frequency point in the multi-network combining device has a fault.

[0007] According to a second aspect of the present application, a network node in a mobile communication network is provided. The network node includes: a measurement configuration unit, configured to configure inter-frequency point measurement for a user equipment in a designated serving cell; a measurement initiation unit, configured to initiate periodic inter-frequency point measurement to instruct the user equipment in the serving cell to perform periodic inter-frequency point measurement according to the configured inter-frequency point measurement; a measurement reception unit, configured to receive an inter-frequency measurement report of the periodic inter-frequency point measurement from the user equipment, wherein the inter-frequency measurement report includes an inter-frequency point number, a serving cell reference signal received power, and an inter-frequency point reference signal received power; and a fault location unit, configured to determine whether a multi-network access point device port corresponding to each inter-frequency point in a multi-network combining device has a fault based on the inter-frequency measurement report.

[0008] According to a third aspect of the present application, a network node in a mobile communication network is provided. The network node includes a processor, wherein the processor can be configured to perform the various operations of the method according to the present application. Alternatively, the network node may further include a memory storing computer-executable instructions, wherein the instructions, when executed by the processor, configure the network node to perform the various operations of the method according to the present application.

[0009] According to a fourth aspect of the present application, a device in a network node of a mobile communication network is provided, which may include one or more components for performing various operations of the method according to the present application.

[0010] According to a fifth aspect of the present application, a computer-readable storage medium storing computer-executable instructions is provided, wherein these instructions, when executed by a processor, perform various operations according to the method of the present application.

[0011] According to a sixth aspect of the present application, there is provided a computer program product storing computer executable instructions, wherein the instructions, when executed by a processor, perform the operations of the method according to the present application.

[0012] By starting the heterofrequency measurement of different standards and different networks involved in the POI combining device with the serving cell as the fault location unit, the present application can obtain the reference signal downlink receiving power of the serving cell and the measured heterofrequency cell from the user equipment, and calculate the average receiving power difference between the networks in the normal operation of the POI combining device based on this, and locate the fault in the multi-network combining device by isolating the sample points and detecting abnormal values ​​in the average receiving power difference between the main and adjacent cells using the isolation forest algorithm (iForest: IsolationForest). The present application can locate POI faults by obtaining the power changes of each operator network involved in the POI combining device from the user equipment while avoiding a large number of field tests, especially avoiding field tests on other operators' networks, thereby providing operators with efficient multi-network combining equipment fault troubleshooting and location. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and / or other aspects and advantages of the present application will become clearer and easier to understand through the following description of the various aspects in conjunction with the accompanying drawings, in which the same or similar elements are represented by the same reference numerals. In the accompanying drawings:

[0014] Figure 1 is a schematic diagram of a mobile communication network involving a multi-network combining device according to an embodiment of the present application;

[0015] Figure 2 This is a schematic diagram of a multi-network combining device network according to an embodiment of the present application;

[0016] Figure 3 is a flow chart of a method for locating a fault in a multi-network combining device according to an embodiment of the present application;

[0017] Figure 4 is a schematic diagram of the structure of a network node according to an embodiment of the present application;

[0018] Figure 5 is a schematic diagram of the structure of a network node according to another embodiment of the present application; and

[0019] Figure 6 It is a schematic diagram according to an embodiment of the present application, which shows an exemplary situation in which the isolation forest algorithm is used to isolate the average value of the difference in received power of t primary neighbor cells of an hetero-frequency point in chronological order as a normal value or an abnormal value. DETAILED DESCRIPTION

[0020] The description of the following specific embodiments is merely exemplary in nature and is not intended to limit the disclosed technology or the application and use of the disclosed technology. In addition, there is no intention to be bound by any express or implied theory presented in the foregoing technical field, background technology or the following specific embodiments.

[0021] In the following detailed description of the preferred embodiments, numerous specific details are set forth to provide a more thorough understanding of the disclosed technology. However, it will be apparent to one skilled in the art that the disclosed technology can be practiced without these specific details. In other instances, well-known features have not been described in detail to avoid unnecessarily complicating the description.

[0022] Phrases such as "comprising" and "including" indicate that in addition to the units and steps that are directly and clearly stated in the specification, the technical solution of the present application does not exclude the situation where there are other units and steps that are not directly or clearly stated. In addition, unless otherwise expressly stated, the terms "first", "second", "third", etc. are intended to distinguish the specific nouns (e.g., elements, regions, modules, activities, operations, etc.) that they modify, but are not intended to indicate any type of order, rank, importance, time sequence or hierarchy of the modified nouns. For example, "first x" and "second x" are intended to represent two independent x elements, which are not necessarily subject to any order, rank, importance, time sequence or hierarchy of the two elements.

[0023] Hereinafter, various exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0024] Figure 1 1 is a schematic diagram of a mobile communication network 100 involving a multi-network combining device according to an embodiment of the present application. As shown in the figure, mobile communication network 100 involves multiple operators, such as operator A and operator B. These operators can provide corresponding wireless signal coverage for their respective subscriber user devices, such as UE 108A and UE 110A, UE 108B and UE 110B, etc., in the same area. In one example, a network node 102 belonging to operator A provides various mobile communication services to its subscriber user devices 108A and 110A via its base station equipment 104 and distributed antenna feed system 112. Network node 102 can be operator A's operation and management center (OMC), and base station equipment 104 belonging to operator A can include one or more baseband functional modules and radio frequency (RF) functional modules. Similarly, another network node 102 belonging to operator B can provide corresponding mobile communication services to its subscriber user devices 108B and 110B via its corresponding base station equipment 104 and distributed antenna feed system 112.

[0025] Providing wireless signal coverage for densely populated user locations such as subways, shopping malls, and large venues may bring about some network planning and optimization issues, such as limited space for indoor distributed system construction, strong interference between systems, and frequent handovers due to poor coverage of multiple systems. To this end, a multi-network combining device 106 can be set between the distributed antenna feed system 112 and the base station equipment 104 of each operator to introduce POI combining technology to combine the multiple-standard, multi-band networks of different operators, so that multiple networks of different operators can share the distributed antenna feed system 112 to provide wireless signal coverage to their corresponding subscriber devices. As a POI networking device for multi-network combining, the multi-network combining device 106 can support ultra-wideband combining technology and realize the combining of multi-standard, multi-band network signals of multiple operators.

[0026] Figure 2 The schematic diagram of a multi-network combining device network based on the multi-network combining device 106 is further shown. As shown in the figure, for example, the signal source devices of each operator of operator A, operator B and operator C, such as Figure 1 The base station device 104 shown in the figure is connected to the multi-network combining device 106 via corresponding feeder lines and access ports, wherein each frequency band belonging to each operator, such as band 1, band 2, band 3, ..., band N, has a corresponding POI device port, and each POI device port may involve part or all of the path between the input of the multi-network combining device 106 connected to the operator's source device and the output connected to the distributed antenna feed system 112.

[0027] Since POI combining technology is introduced to combine multiple standards and multi-band networks of different operators, equipment failures in the multi-network combining equipment, such as hardware connection failures and POI electrical performance, will have a significant impact on the antenna port output power of the distributed antenna feed system 112. Currently, weak network coverage caused by failures in such multi-network combining equipment is generally located through on-site troubleshooting by maintenance personnel, on-site coverage testing, network performance indicator analysis, and receiving complaints from users in the corresponding area. Such fault location methods have limited positioning accuracy, require on-site maintenance personnel to work, and have a long fault location cycle. At the same time, because the multi-network combining equipment 106 involves multiple networks of different operators, test terminals that support all network frequency bands and standards of all operators need to be configured during on-site testing, resulting in a high cost of obtaining test data.

[0028] The present application recognizes that since there is a one-to-one correspondence between each frequency band or frequency point belonging to the operator and each POI device port of the multi-network combining device 106, the operating status of each POI device port is associated with the wireless signal coverage status of the corresponding frequency band. Therefore, the operating status of the POI device port corresponding to the frequency band or frequency point in the multi-network combining device 106 can be determined by analyzing the measurement report of the relevant reference signal power involving each frequency band or frequency point reported by the user device, thereby determining the corresponding POI device port that has a fault.

[0029] Figure 3 The flowchart of a method 300 for locating a fault in a multi-network combining device according to an embodiment of the present application is shown. The method 300 may be executed by the network node 102 of operator A.

[0030] In step S310, network node 102 configures inter-frequency point measurement for user equipment belonging to the service cell of operator A. The configured inter-frequency point measurement complies with the measurement configuration requirements of relevant communication standards, such as the 5G network MR (MeasureReport) collection specification, and may include one or more of the following: the inter-frequency band or frequency to be measured, the measurement execution period, the data content and format requirements of the measurement report, etc., wherein the measurement execution period is determined by operator A based on engineering requirements. The inter-frequency points involved in the configured inter-frequency point measurement may include the carrier frequencies of other cells other than the carrier frequency of the designated service cell of operator A, including the carrier frequencies of cells belonging to operator A that are adjacent to the designated service cell and / or the carrier frequencies of cells belonging to other operators (such as operator B and / or operator C) in the same area. These other cells may be collectively referred to as adjacent cells hereinafter.

[0031] In one example, inter-frequency point measurements are configured for user equipment in a 5G network serving cell. There are two common methods for collecting sample data for 5G network measurement reports: periodic measurement and event-based measurement. Event-based measurement is typically used for routine measurements during user equipment mobility handovers. To meet the computational requirements for fault location in a multi-network combining device, network node 102 configures inter-frequency point measurements as periodic measurements for user equipment in a mobile communication network 100 involving a multi-network combining device 106.

[0032] Therefore, in step S320, the network node 102 initiates periodic inter-frequency measurement to instruct the user equipment in the serving cell to perform periodic inter-frequency measurement according to the configured inter-frequency measurement.

[0033] In one example, the network node 102 may initiate periodic inter-frequency measurement by transmitting a measurement control message to the user equipment in the serving cell, wherein the transmitted measurement control message may also include the configured inter-frequency measurement.

[0034] When starting periodic inter-frequency point measurement, the measurement report script is started for the 5G service cell to configure the network frequencies of all operators feeding into the system in the POI multi-network combining device, so that after the user equipment in the corresponding cell performs periodic inter-frequency point measurement according to the configured inter-frequency point measurement, the cell-level measurement report results are obtained from these user equipment, and then the difference in received power RSRP between the service cell and other network cells (i.e., neighboring cells) is calculated based on the measurement results to locate the fault in the multi-network combining device.

[0035] In response to receiving inter-frequency point measurements configured by network node 102 of operator A, user equipment belonging to operator A in a designated serving cell may perform corresponding periodic inter-frequency point measurements according to the configured inter-frequency point measurements, including measuring the reference signal received power of the serving cell carrier frequency and the reference signal received power of each inter-frequency point in the neighboring cells. Then, based on the measured reference signal received power of the serving cell carrier frequency and the reference signal received power of each inter-frequency point, as well as the physical cell identity (PCI) of the serving cell and / or the physical cell identity of each neighboring cell, each user equipment belonging to operator A prepares a corresponding measurement report for reporting to network node 102, where the PCI may be composed of primary and secondary synchronization sequences and may be reused in the network.

[0036] In step S330 , the network node 102 receives an inter-frequency measurement report of periodic inter-frequency point measurement from the user equipment.

[0037] In one example, if inter-frequency point measurement is configured by the network node 102 of operator A according to the 5G network MR acquisition specification, and the user equipment within the designated service cell of operator A performs periodic inter-frequency point measurement according to the configured inter-frequency point measurement, the measurement report received by the network node 102 from the user equipment may include one or more of the cell identification information and reception level of the 5G network NR (New Radio) service cell information, NR neighboring cells, and LTE (Long Term Evolution) neighboring cells of operator A, wherein the NR neighboring cells and LTE neighboring cells involve the network of this operator (i.e., operator A) and / or the network of other operators (such as operator B and / or operator C), and may include defined neighboring cells and / or undefined neighboring cells of the NR service cell.

[0038] Table 1 lists the relevant indicators involved in the exemplary inter-frequency point measurement report and their meanings.

[0039]

[0040] Table 1

[0041] In one example, the inter-frequency measurement report reported by the user equipment may include the inter-frequency point number, the reference signal received power of the serving cell, and the inter-frequency point reference signal received power of the neighboring cell. In another example, the inter-frequency measurement report reported by the user equipment may further include the serving cell physical cell identification code, the serving cell carrier frequency point number, and the neighboring cell physical cell identification code corresponding to the inter-frequency point number. The network node 102 may combine the serving cell physical cell identification code and the serving cell carrier frequency point number as the unique identifier of the serving cell, and may also combine the inter-frequency point number and the corresponding neighboring cell physical cell identification code as the unique identifier of the corresponding neighboring cell.

[0042] In one example, the network node 102 may extract "MR.NRScPci" and "MR.NRScArfcn" from the NR network measurement report. The former represents the physical cell identifier of the UE's serving cell, while the latter represents the carrier frequency number of the UE's serving cell. The network node 102 may combine the two extracted indicators to uniquely identify the NR serving cell. Similarly, the network node 102 may extract "MR.NRNcPci" and "MR.NRNcArfcn" from the NR network measurement report. The former represents the physical cell identifier of the NR neighboring cell, while the latter represents the carrier frequency number of the NR neighboring cell. The network node 102 may combine the two extracted indicators to uniquely identify the NR neighboring cell. The network node 102 may also extract "MR.LteNcPci" and "MR.LteNcEarfcn" from the NR network measurement report. The former represents the physical cell identifier of the LTE neighboring cell, while the latter represents the carrier frequency number of the LTE neighboring cell. The network node 102 may combine the two extracted indicators to uniquely identify the NR neighboring cell.

[0043] By combining the serving cell carrier frequency number with the serving cell physical cell identification code to uniquely identify the designated serving cell, it is possible to filter out reported data related to unnecessary serving cells other than the designated serving cell (i.e., other serving cells belonging to operator A) when the serving cell is used as the fault location / correction unit. Similarly, by combining the inter-frequency frequency number with the corresponding neighboring cell physical cell identification code to uniquely identify the corresponding neighboring cell relative to the designated serving cell, it is possible to filter out reported data related to unnecessary neighboring cells other than the corresponding neighboring cell.

[0044] In one example, MR.NRScSSRSRP in the measurement report reported by the user equipment is the NR serving cell received power ScRSRP, and MR.NRNcSSRSRP and MR.LteNcRSRP in the measurement report are the NR / LTE neighboring cell received power NcRSRP. If the NR and LTE neighboring cells of the serving cell A in the mobile communication network involving the POI multi-network combining device are, for example, cell B, cell C, ..., cell N, then the network node 102 can obtain a sample data set with a total of m sampling points related to its corresponding inter-frequency point (i.e., its corresponding NR network neighboring area and LTE network neighboring area) from the user equipment of the serving cell within a certain period of time after initiating the periodic inter-frequency point measurement of the serving cell A.

[0045] Table 2 shows an exemplary sample data set including corresponding measurement indicators and measurement data with a total number of sampling points m.

[0046] Sample No. S_Cell N_Cell ScRSRP NcRSRP 1 <![CDATA[CELL A ]]> <![CDATA[CELL B ]]> <![CDATA[ScRSRP1]]> <![CDATA[NcRSRP1]]> 2 <![CDATA[CELL A ]]> <![CDATA[CELL B ]]> <![CDATA[ScRSRP2]]> <![CDATA[NcRSRP2]]> 3 <![CDATA[CELL A ]]> <![CDATA[CELL C ]]> <![CDATA[ScRSRP3]]> <![CDATA[NcRSRP3]]> 4 <![CDATA[CELL A ]]> <![CDATA[CELL C ]]> <![CDATA[ScRSRP4]]> <![CDATA[NcRSRP4]]> … … … … … m <![CDATA[CELL A ]]> <![CDATA[CELL N ]]> <![CDATA[ScRSRP m ]]> <![CDATA[NcRSRP m ]]>

[0047] Table 2

[0048] In the exemplary sample data set including m sampling points shown in Table 2, sample data 1 may represent the serving cell reference signal received power and the reference signal received power of neighboring cell B reported by a first user equipment in serving cell A, and sample data 2 may represent the serving cell reference signal received power and the reference signal received power of neighboring cell B reported by a second user equipment in serving cell A or reported by the first user equipment related to sample data 1 at a different time and / or different location. Similarly, sample data 3 may represent the serving cell reference signal received power and the reference signal received power of neighboring cell C reported by one user equipment in serving cell A, and sample data 4 may represent the serving cell reference signal received power and the reference signal received power of neighboring cell C reported by another user equipment in serving cell A or reported by the user equipment related to sample data 3 at a different time and / or different location.

[0049] In step 340 , the network node 102 may determine whether a fault occurs on a multi-network access point device port corresponding to each inter-frequency point in the multi-network combining device 106 based on the inter-frequency measurement report from the user equipment.

[0050] To this end, for each inter-frequency point, the network node 106 can calculate the average value of the primary neighbor cell received power difference by calculating the average of the differences between multiple serving cell reference signal received powers and the corresponding multiple inter-frequency point reference signal received powers of the inter-frequency point.

[0051] If there are n sample data involving neighboring cell B in the sample data set of m sampling points, then the average value of the difference in primary neighboring cell received power between serving cell A and neighboring cell B is calculated based on the serving cell reference signal received power and neighboring cell reference signal received power in these n sample data. B for:

[0052]

[0053] Similarly, based on the corresponding sample data of each other neighboring area (such as neighboring area C, neighboring area D, ..., neighboring area N) in the sample data set of m sampling points, the average value X of the difference in the main neighboring cell received power between the serving cell A and each other neighboring area is calculated. C 、X D ,…,X N .

[0054] In one example, the NcRSRP in the above formula may include LTE network neighboring cells and / or NR network neighboring cells according to the heterofrequency network frequency. If the number of heterofrequency network frequencies in the multi-network combining device is N, then for the serving cell A in the mobile communication network involving the multi-network combining device, the average value of the difference in received power of the N primary neighboring cells can be calculated, that is, the average value of the difference in received power of the primary neighboring cells of each neighboring cell in the mobile communication network is X1-X N This value indicates the difference in downlink reference signal received power between the serving cell and each frequency neighboring cell in the measurement report.

[0055] In order to determine whether the ports of the multi-network access point device corresponding to each heterodyne frequency point are faulty, the network node 102 may use an artificial intelligence (AI) algorithm, such as an isolation forest algorithm, to separate each value in the calculated average values ​​of the received power differences of the N primary and neighboring cells into a normal value or an abnormal value.

[0056] The Isolation Forest algorithm is an outlier anomaly detection method with linear time complexity and high accuracy, making it suitable for anomaly detection in continuous data. Unlike other anomaly detection algorithms that use quantitative metrics such as distance and density to characterize the degree of separation between samples, the Isolation Forest algorithm detects outliers by isolating sample points. This algorithm utilizes a binary search tree structure called an Isolation Tree (iTree) to isolate samples. Due to the small number of outliers and their isolation from the majority of samples, outliers are isolated earlier, meaning they are closer to the root node of the iTree, while normal values ​​are farther away from the root node. An iForest can be composed of t iTree isolation trees, each of which is a binary tree structure. The algorithm can be divided into two phases: the first phase trains t isolation trees to form an isolation forest; the second phase inserts each sample point into each isolation tree in the forest, calculates the average height, and then calculates the outlier score for each sample point. The Isolation Forest anomaly score s(x,n) is calculated as:

[0057]

[0058] in:

[0059] E(h(x)) is the mean path length of sample x in t iTrees, and c(n) is the average path length of n samples to construct a BST (Binary Search Tree) binary tree. It is a normalization constant that depends on the size of the data set n. Its calculation formula is as follows:

[0060]

[0061] Among them, 0.5772156649 is Euler's constant.

[0062] E(h(x)) is the average value of the path length h(x) from the root node to the external node x, and c(n) is the average value of h(x) for a given n. The exponential part of s(x,n) has a range of (-∞,0), so the range of s is (0,1). The smaller the path length, the closer s is to 1, and the greater the probability that the sample is an outlier.

[0063] The network node 102 can detect abnormalities in the average value of the primary and neighboring cell received power difference at each inter-frequency point in a time series by using the isolation forest algorithm. The network node 102 can collect multiple measurement report data in a time series, and the calculation method of applying the isolation forest algorithm can be: 1. The average value X of the primary and neighboring cell received power difference in the time series t times corresponds to h(x) in the isolation forest algorithm; 2. The number of times the average value of the primary and neighboring cell received power difference is obtained is the c(n) data set in the isolation forest algorithm.

[0064] In the process of executing the isolation forest algorithm, it is first set for each outlier frequency point that outliers usually have a shorter isolation path in the data set, and outliers are easier to be isolated than normal points, that is, the score of the outlier will be close to 1, and the score far less than 0.5 represents a normal observation result. If all scores are close to 0.5, the network node 102 can determine that all samples involving the outlier frequency point have no significantly different outliers.

[0065] This application uses the isolation forest algorithm to separate the normal value or abnormal value of the average value X of the difference in received power between the primary and adjacent cells at each different frequency point. Figure 6 The schematic diagram in FIG. 1 shows an exemplary case where the isolation forest algorithm is used to isolate the average values ​​of the received power differences of t primary neighboring cells at an inter-frequency point in chronological order as normal values ​​or abnormal values.

[0066] like Figure 6 As shown in , the measurement report data is collected in a linear time series to obtain the average value of the difference in received power between the primary and adjacent cells X. When the average value of the received power difference data at time t' is calculated by the isolation algorithm to obtain the abnormal score s(x,n) close to 1, it is determined that the value at time t' is an abnormal value. The average value of the difference in received power between the primary and adjacent cells X collected at this time point is t′ The judgment threshold is a multiple K above the normal median value of X. Since port failures in multi-network combining devices generally manifest as persistent hardware failures, if the average received power difference calculated from the inter-frequency neighboring frequency point N measurement report data collected from the serving cell of the mobile communication network involving the multi-network combining device is continuously higher than K times the normal median value of X, the POI device port corresponding to the neighboring frequency point is judged to have a fault.

[0067] Therefore, network node 102 can use the average values ​​of primary and neighboring cell received power differences in chronological order and the number of times the average values ​​of primary and neighboring cell received power differences were obtained as inputs h(x) and c(n), and calculate the isolation forest anomaly score s(x,n) as output according to the above-mentioned isolation forest anomaly score formula. Network node 102 can also separate each average value of primary and neighboring cell received power differences into a normal value or an abnormal value based on the calculated isolation anomaly score, and determine that the multi-network access point device port corresponding to an inter-frequency point has a fault when the average value of the primary and neighboring cell received power differences at that inter-frequency point is continuously higher than K times the median value of the normal difference average value. The parameter K can be set to, for example, 2.0 or above according to engineering requirements.

[0068] Figure 4FIG4 is a schematic diagram of the structure of a network node 102 according to an embodiment of the present application. The network node 102 may include a measurement configuration unit 402, a measurement initiation unit 404, a measurement receiving unit 406, and a fault location unit 408. These units cooperate with each other to enable the network node 102 to locate faults in a multi-network combining device.

[0069] The measurement configuration unit 402 may configure inter-frequency point measurement for the user equipment of the designated serving cell, which is similar to or the same as the operation of configuring inter-frequency point measurement described above.

[0070] The measurement configuration unit 402 configures inter-frequency point measurement for user equipment belonging to the service cell of operator A. The configured inter-frequency point measurement complies with the measurement configuration requirements of relevant communication standards, such as the 5G network MR (Measure Report) collection specification, and may include one or more of the following: the inter-frequency band or frequency to be measured, the measurement execution period, the data content and format requirements of the measurement report, etc., wherein the measurement execution period is determined by operator A according to engineering requirements. The inter-frequency points involved in the configured inter-frequency point measurement may include the carrier frequencies of other service cells (also called neighboring cells) other than the carrier frequency of the designated service cell of operator A, including the carrier frequencies of cells belonging to operator A that are neighboring cells relative to the designated service cell and / or the carrier frequencies of cells belonging to other operators (such as operator B and / or operator C) in the area.

[0071] In one example, the measurement configuration unit 402 configures inter-frequency point measurements for user equipment in a 5G network serving cell. To meet the computational requirements for fault location in a multi-network combining device, the measurement configuration unit 402 configures inter-frequency point measurements as periodic measurements for user equipment in a designated serving cell in the mobile communication network 100 involving the multi-network combining device.

[0072] The measurement starting unit 404 is used to start periodic inter-frequency measurement to instruct the user equipment in the serving cell to perform periodic inter-frequency measurement according to the configured inter-frequency measurement, which is similar to or the same as the operation of starting periodic inter-frequency measurement described above.

[0073] In an example, the measurement initiating unit 404 may initiate the periodic inter-frequency measurement by transmitting a measurement control message to the user equipment in the serving cell, wherein the transmitted measurement control message may further include the configured inter-frequency measurement.

[0074] When starting periodic inter-frequency point measurement, the measurement report script is started for the 5G service cell to configure the network frequencies of all operators feeding into the system in the POI multi-network combining device, so that after the user equipment in the corresponding cell performs periodic inter-frequency point measurement according to the configured inter-frequency point measurement, the cell-level measurement report results are obtained from these user equipment, and then the difference in received power RSRP between the service cell and other network cells is calculated based on the measurement results to locate the fault in the multi-network combining device.

[0075] In response to receiving the inter-frequency measurement configured by the measurement configuration unit 402, the user equipment in the designated serving cell may perform corresponding periodic inter-frequency measurement according to the configured inter-frequency measurement, including measuring the reference signal received power of the serving cell carrier frequency and the reference signal received power of each inter-frequency frequency. Then, based on the measured reference signal received power of the serving cell carrier frequency and the reference signal received power of each inter-frequency frequency of the neighboring cell, as well as the physical cell identification code of the serving cell and / or the physical cell identification codes of each neighboring cell, the user equipment prepares a corresponding measurement report for reporting to the network node 102.

[0076] The measurement receiving unit 406 is configured to receive an inter-frequency measurement report of periodic inter-frequency point measurement from the user equipment, and forward the received inter-frequency measurement report to the fault localization unit 406. The measurement report may include the inter-frequency point number, the serving cell reference signal received power, and the inter-frequency point reference signal received power, and may also include one or more of the following indicators: the serving cell physical cell identification code, the serving cell carrier frequency point number, and the neighboring cell physical cell identification code corresponding to the inter-frequency point number.

[0077] The fault location unit 406 can combine the service cell carrier frequency point number and the service cell physical cell identification code to uniquely identify the designated service cell, and combine the heterogeneous frequency point number and the corresponding neighboring cell physical cell identification code to uniquely identify the corresponding neighboring cell relative to the designated service cell, thereby filtering out the reporting data of unnecessary service cells other than the designated service cell and the reporting data of unnecessary neighboring cells other than the corresponding neighboring cells.

[0078] The fault location unit 406 may also determine whether a fault occurs on a multi-network access point device port corresponding to each inter-frequency point in the multi-network combining device 106 based on the inter-frequency measurement report from the user equipment.

[0079] To this end, for each inter-frequency point, the fault location unit 406 can calculate the average value of the main neighbor cell received power difference by calculating the average of the differences between the reference signal received powers of multiple serving cells and the corresponding multiple inter-frequency point reference signal received powers of the inter-frequency point, and use the isolation forest algorithm as described above to separate each value in the N average values ​​of the main neighbor cell received power differences into a normal value or an abnormal value.

[0080] The fault localization unit 406 may take as inputs h(x) and c(n) the average of multiple primary-neighboring cell received power difference values ​​in chronological order for each inter-frequency point and the number of times the average primary-neighboring cell received power difference value is obtained, and calculates the isolation forest anomaly score s(x,n) as output according to the above-mentioned isolation forest anomaly score formula. The fault localization unit 406 may also separate each primary-neighboring cell received power difference average value into a normal value or an abnormal value based on the calculated isolation anomaly score, and determine that the multi-network access point device port corresponding to the inter-frequency point has a fault when the average primary-neighboring cell received power difference value at the inter-frequency point is continuously higher than K times the median of the normal difference average value. The parameter K may be set to 2.0 or above based on engineering requirements.

[0081] Figure 5 is a schematic diagram of the structure of a network node 102 according to another embodiment of the present application. As shown in the figure, the network node 102 may include a processor 502 and a memory 504 storing computer-executable instructions 506. When these instructions 506 are executed by the processor 502, the network node 102 is configured to perform operations in one or more methods or processes described herein. In another example, the network node 102 includes the processor 502, which is configured to perform operations in one or more methods or processes described herein. In yet another example, the network node 102 includes one or more components for performing operations in one or more methods or processes described herein.

[0082] In one example, the present application also provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor or computing device, perform operations in one or more methods or processes described herein.

[0083] In another example, the present application also provides a computer program product storing computer-executable instructions. When these instructions are executed by a processor or a computing device, they perform operations in one or more methods or processes described herein.

[0084] By adopting the method and equipment described in this article, by analyzing the inter-frequency point measurement reports reported by user equipment in the service cell of the mobile communication network involving multi-network combining equipment, this application can locate the POI device port fault corresponding to the inter-frequency point with abnormal measurement data without a large number of on-site tests, especially without avoiding on-site tests on other operators' networks, thereby providing operators with efficient multi-network combining equipment fault troubleshooting and positioning.

[0085] The embodiments and examples set forth herein are provided to best illustrate embodiments according to the present application and its specific applications, and thereby enable those skilled in the art to make and use the present application. However, those skilled in the art will appreciate that the above description and examples are provided for ease of illustration and example only. The descriptions set forth are not intended to be exhaustive of all aspects of the present application or to limit the present application to the precise forms disclosed.

Claims

1. A method for locating a fault in a multi-network combining device, comprising: Configure inter-frequency point measurements for user equipment in a specified serving cell; Starting periodic inter-frequency point measurement to instruct the user equipment in the serving cell to perform the periodic inter-frequency point measurement according to the configured inter-frequency point measurement; receiving an inter-frequency measurement report of the periodic inter-frequency point measurement from the user equipment, the inter-frequency measurement report including an inter-frequency point number, a serving cell reference signal received power, and an inter-frequency point reference signal received power; as well as Based on the inter-frequency measurement report, it is determined whether a fault occurs on a multi-network access point device port corresponding to each inter-frequency point in the multi-network combining device.

2. The method according to claim 1, wherein Determining whether a fault occurs on a multi-network access point device port corresponding to each inter-frequency point in the multi-network combining device based on the inter-frequency measurement report includes: for each inter-frequency point, Calculate the average value of the primary neighbor cell received power difference by calculating the average of the differences between the reference signal received powers of multiple serving cells and the reference signal received powers of multiple inter-frequency points corresponding to the inter-frequency point; Calculate the average value of the primary and adjacent cell received power differences over multiple times in chronological order; and Based on the average values ​​of the multiple primary-neighbor cell received power differences, an isolation forest algorithm is used to determine whether a fault occurs in the multi-network access point device ports corresponding to the inter-frequency point.

3. The method according to claim 2, wherein: The isolation forest algorithm uses the average value of the multiple primary-neighbor cell received power difference values ​​and the number of times the average value of the primary-neighbor cell received power difference value is obtained as input, and calculates an isolation anomaly score as output.

4. The method according to claim 3, wherein: The average values ​​of the multiple primary-neighbor cell received power differences are separated into normal values ​​or abnormal values ​​based on the calculated isolation anomaly scores.

5. The method according to claim 4, wherein: When the average value of the difference between the primary and adjacent cell received power of a certain inter-frequency point is continuously higher than K times the median value of the normal difference average value, it is determined that the multi-network access point device port corresponding to the inter-frequency point is faulty.

6. The method according to any one of claims 1 to 5, wherein The multi-network access point device port refers to part or all of the path between the input of the multi-network combiner device connected to the operator's source device and the output connected to the distributed antenna feeder system.

7. The method according to any one of claims 1 to 5, wherein The operator of at least one inter-frequency point is different from the operator of the serving cell.

8. The method according to any one of claims 1 to 5, wherein The inter-frequency measurement report also includes a serving cell physical cell identification code, a serving cell carrier frequency number, and a neighboring cell physical cell identification code corresponding to the inter-frequency frequency number, and the method further includes: combining the serving cell physical cell identification code and the serving cell carrier frequency number as a unique identifier of the serving cell; and The inter-frequency point number and the corresponding neighboring physical cell identification code are combined as the unique identifier of the corresponding neighboring cell.

9. A network node in a mobile communication network, comprising: A measurement configuration unit, configured to configure inter-frequency point measurement for user equipment in a designated serving cell; a measurement starting unit, configured to start periodic inter-frequency point measurement to instruct the user equipment in the serving cell to perform the periodic inter-frequency point measurement according to the configured inter-frequency point measurement; a measurement receiving unit, configured to receive an inter-frequency measurement report of the periodic inter-frequency point measurement from the user equipment, the inter-frequency measurement report including an inter-frequency point number, a serving cell reference signal received power, and an inter-frequency point reference signal received power; as well as The fault location unit is configured to determine whether a fault occurs on a multi-network access point device port corresponding to each inter-frequency point in the multi-network combining device based on the inter-frequency measurement report.

10. The network node according to claim 9, wherein: The fault location unit is further configured to: for each different frequency point, Calculate the average value of the primary neighbor cell received power difference by calculating the average of the differences between the reference signal received powers of multiple serving cells and the reference signal received powers of multiple inter-frequency points corresponding to the inter-frequency point; Calculate the average value of the received power difference between the primary and adjacent cells in chronological order; as well as Based on the average values ​​of the multiple primary-neighbor cell received power differences, an isolation forest algorithm is used to determine whether a fault occurs in the multi-network access point device ports corresponding to the inter-frequency point.

11. The network node according to claim 10, wherein: The isolation forest algorithm uses the average value of the multiple primary-neighbor cell received power difference values ​​and the number of times the average value of the primary-neighbor cell received power difference value is obtained as input, and calculates an isolation anomaly score as output.

12. The network node according to claim 11, wherein: The fault location unit is further configured to separate the multiple average values ​​of the primary neighbor cell received power difference values ​​into normal values ​​or abnormal values ​​based on the calculated isolation abnormality score.

13. The network node according to claim 12, wherein: The fault location unit is further configured to: determine that a multi-network access point device port corresponding to a certain inter-frequency point has a fault when the average value of the difference in received power between the primary and adjacent cells of the inter-frequency point is continuously higher than K times the median value of the normal difference average value.

14. The network node according to any one of claims 9 to 13, wherein: The multi-network access point device port refers to part or all of the path between the input of the multi-network combiner device connected to the operator's source device and the output connected to the distributed antenna feeder system.

15. The network node according to any one of claims 9 to 13, wherein: The operator of at least one inter-frequency point is different from the operator of the serving cell.

16. The network node according to any one of claims 9 to 13, wherein: The inter-frequency measurement report also includes a serving cell physical cell identification code, a serving cell carrier frequency number, and a neighboring cell physical cell identification code corresponding to the inter-frequency frequency number, and the fault location unit is further configured to: combining the serving cell physical cell identification code and the serving cell carrier frequency number as a unique identifier of the serving cell; and The inter-frequency point number and the corresponding neighboring physical cell identification code are combined as the unique identifier of the corresponding neighboring cell.

17. A network node in a mobile communication network, comprising: processor; and A memory storing computer executable instructions, which, when executed by the processor, configure the network node to perform the method according to any one of claims 1 to 8.

18. A network node in a mobile communication network, comprising: A processor configured to execute the method according to any one of claims 1 to 8.

19. A computer-readable storage medium storing computer-executable instructions, wherein when the instructions are executed by a processor, the method according to any one of claims 1 to 8 is performed.

20. An apparatus in a network node of a mobile communication network, comprising means for executing the method according to any one of claims 1 to 8.

21. A computer program product storing computer executable instructions, wherein when the instructions are executed by a processor, the method according to any one of claims 1 to 8 is performed.

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