Switching threshold dynamic setting method, wireless signal switching method and related device

Abstract

The invention belongs to a wireless signal connection control method, and aims to solve the technical problem that when a wireless signal coverage area is switched in the moving process of intelligent inspection equipment at present, a method which is easily interfered when a set threshold value is compensated by adding wireless base station arrangement points is adopted, and the equipment application cost is high. According to the switching threshold dynamic setting method, the wireless signal switching method and the related device, the ascending and descending trend of a source base station curve is judged, and when the ascending and descending trend of the source base station curve is descending, it is indicated that mobile inspection equipment is far away from a source base station; performing curve fitting according to the wireless signal index parameters of other base stations and the corresponding acquisition time points to obtain curves of the base stations, determining cross points of the curves of the base stations, obtaining wireless signal index parameters of the cross points, selecting the maximum value of the wireless signal index parameter from the wireless signal index parameters of the cross points as a switching threshold, and switching the wireless signal index parameters of the base stations according to the switching threshold. A switching threshold is dynamically set in real time, and it is ensured that the mobile inspection equipment is in an optimal communication environment.

Description

Technical Field

[0001] The present application relates to a wireless signal connection control method, and specifically to a switching threshold dynamic setting method, a wireless signal switching method and related devices. Background Art

[0002] In the new power system, substations, converter stations, switchgears and other fields need to achieve high-security, high-reliability, and high-bandwidth wireless communications within the area to ensure the effective transmission of business data such as local environmental monitoring, video acquisition, intelligent inspection, and remote control in these places. As an effective detection method, intelligent inspection presents the characteristics of diversity and rapidity, such as safety inspection helmets for inspectors, inspection crawler robots, and drone inspections. These mobile inspection equipment needs to transmit the data collected by the sensors they carry to the platform in real time and reliably through wireless signals. During the movement of the equipment, it is inevitable that the wireless signal coverage area will be switched. During the switching process, the threshold value is generally set according to the preset conditions, such as by setting the threshold value for the received signal RSSI (Received Signal Strength Indicator) received from the wireless base station, and related parameters RSRP (Reference Signal Receiving Power) and RSRQ (Reference Signal Receiving Quality). However, due to the influence of speed changes during inspection, strong electromagnetic interference, switching between indoor and outdoor environments, and changes in ambient temperature and humidity, data transmission delays and interruptions may occur during the switching process. The main solution currently used is to increase the number of wireless base station deployment points and increase the signal strength in the coverage area, which also greatly increases the cost of equipment application. Summary of the invention

[0003] This application aims to address the technical problem of high equipment application cost in the current method of increasing wireless base station layout points to compensate for interference when setting threshold values ​​when wireless signal coverage areas are switched during movement of intelligent patrol equipment. A method for dynamically setting a switching threshold, a wireless signal switching method and related devices are provided.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions: In a first aspect, the present application proposes a method for dynamically setting a switching threshold, comprising: During the operation of the mobile inspection device, the wireless signal index parameters of the current source base station within a preset time period are collected; Perform curve fitting according to the wireless signal indicator parameters of the source base station and the corresponding collection time points to obtain the source base station curve; Determine the rising and falling trend of the source base station curve. If the trend is falling, perform the following steps: Collecting wireless signal index parameters of other base stations within a preset range within a preset time period; Perform curve fitting according to the wireless signal index parameters of other base stations and the corresponding collection time points to obtain the curve of each base station; Determine the intersection of each base station curve and obtain the wireless signal index parameters of the intersection; The maximum value of the wireless signal indicator parameter is selected from the wireless signal indicator parameters of the intersection as the switching threshold.

[0005] Furthermore, it also includes: If the mobile inspection device moves at a uniform speed, the time point closest to the current time among the time points corresponding to the wireless signal indicator parameters of the intersection is used as the switching time point.

[0006] Further, performing curve fitting according to the wireless signal indicator parameters of the source base station and the corresponding collection time points includes: According to the wireless signal index parameters of the source base station and the corresponding collection time points, the curve fitting function is calculated by a linear regression algorithm to obtain the source base station curve.

[0007] Further, the determining the rising and falling trend of the source base station curve includes: The first-order derivative of the curve fitting function corresponding to the source base station curve is calculated. If the first-order derivative is less than zero, the rising and falling trend of the source base station curve is descending; if the first-order derivative is greater than zero, the rising and falling trend of the source base station curve is ascending.

[0008] Furthermore, the wireless signal indicator parameter includes any one of RSSI, RSRP, and RSRQ.

[0009] In a second aspect, the present application proposes a wireless signal switching method, comprising: Collect real-time wireless signal index parameters of mobile inspection equipment; Compare the real-time wireless signal index parameters with the switching threshold, and perform switching when the switching threshold is reached; The switching threshold is determined by using the above-mentioned switching threshold dynamic setting method.

[0010] In a third aspect, the present application proposes a wireless signal switching system, comprising: The third acquisition module is used to collect real-time wireless signal index parameters of mobile inspection equipment; A switching module is used to compare the real-time wireless signal index parameters with the switching threshold, and perform switching when the switching threshold is reached; The switching threshold is determined by using the above-mentioned switching threshold dynamic setting method.

[0011] In a fourth aspect, the present application proposes a system for dynamically setting a switching threshold, comprising: The first acquisition module is used to collect the wireless signal index parameters of the current source base station within a preset time period when the mobile inspection device is in working state; A first fitting module, used to perform curve fitting according to the wireless signal index parameters of the source base station and the corresponding collection time points to obtain a source base station curve; A judgment module, used to judge the rising and falling trend of the source base station curve; The second collection module is used to collect the wireless signal index parameters of other base stations in a preset range within a preset time period when the trend is decreasing; The second fitting curve is used to perform curve fitting according to the wireless signal index parameters of other base stations and the corresponding collection time points to obtain the curve of each base station; The intersection module is used to determine the intersection points of the curves of each base station and obtain the wireless signal index parameters of the intersection points; The threshold module is used to select the maximum value of the wireless signal indicator parameter from the wireless signal indicator parameters of the intersection as the switching threshold.

[0012] Furthermore, it also includes: If the mobile inspection device moves at a uniform speed, the time point closest to the current time among the time points corresponding to the wireless signal indicator parameters of the intersection is used as the switching time point.

[0013] Further, performing curve fitting according to the wireless signal indicator parameters of the source base station and the corresponding collection time points includes: According to the wireless signal index parameters of the source base station and the corresponding collection time points, the curve fitting function is calculated by a linear regression algorithm to obtain the source base station curve.

[0014] Further, the determining the rising and falling trend of the source base station curve includes: The first-order derivative of the curve fitting function corresponding to the source base station curve is calculated. If the first-order derivative is less than zero, the rising and falling trend of the source base station curve is descending; if the first-order derivative is greater than zero, the rising and falling trend of the source base station curve is ascending.

[0015] Furthermore, the wireless signal indicator parameter includes any one of RSSI, RSRP, and RSRQ.

[0016] In a fifth aspect, the present application proposes an electronic device, comprising: a memory, and one or more processors; the memory is coupled to the processor; wherein the memory stores computer program code, and the computer program code includes computer instructions, and when the computer instructions are executed by the processor, the electronic device executes the steps of the above-mentioned switching threshold dynamic setting method, or the electronic device executes the steps of the above-mentioned wireless signal switching method.

[0017] In the sixth aspect, the present application proposes a computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, and when the computer program is executed by the processor, the steps of the above-mentioned switching threshold dynamic setting method are implemented, or when the computer program is executed by the processor, the steps of the above-mentioned wireless signal switching method are implemented.

[0018] Compared with the prior art, this application has the following beneficial effects: The present application proposes a method for dynamically setting a switching threshold, which determines the rising and falling trend of the source base station curve. When the rising and falling trend of the source base station curve is falling, it indicates that the mobile inspection device is moving away from the source base station. The curve is fitted according to the wireless signal index parameters of other base stations and the corresponding acquisition time points to obtain the curves of each base station, determine the intersection of each base station curve, obtain the wireless signal index parameters of the intersection, select the maximum value of the wireless signal index parameters from the wireless signal index parameters of the intersection as the switching threshold, and set the switching threshold dynamically in real time to ensure that the mobile inspection device is in the optimal communication environment, optimize the base station deployment location, reduce the number of base station deployments, and reduce the cost of mobile inspection equipment. At the same time, the setting method avoids parameter errors caused by changes in weather environment, electromagnetic dynamic interference, and changes in equipment operating speed, and ensures the reliability of data communication during the switching process. In addition, curve fitting for multiple base stations can ensure the selection of the optimal base station and ensure switching accuracy.

[0019] The present application also proposes a wireless signal switching method, which has all the advantages of the above-mentioned method for dynamically setting the switching threshold. In addition, the switching time point can be predicted, which helps to prepare for the switching in advance and reduce the time delay caused by the switching process.

[0020] The present application also proposes a corresponding system, electronic device and computer storage medium, which have all the advantages of the above-mentioned switching threshold dynamic setting method and wireless signal switching method. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 Schematic diagram of the principle of dynamically setting the switching threshold for mobile inspection equipment; Figure 2 A schematic diagram of a method for dynamically setting a switching threshold in this application; Figure 3 Another flowchart of the method for dynamically setting the switching threshold of this application; Figure 4 A schematic diagram of the principle of dynamically selecting a switching threshold value and a switching time point in an embodiment of the present application; Figure 5 A schematic diagram of a system for dynamically setting a switching threshold for this application; Figure 6 A schematic diagram of a wireless signal switching method of the present application; Figure 7 This is a schematic diagram of the wireless signal switching system of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] With the transformation and upgrading of traditional power systems to new power systems, the randomness and volatility of both sides of "source and load" have significantly increased. The internal and external environment and various policy requirements are intertwined and superimposed. The power supply security faces great challenges. Normalized and refined power equipment communication and resource management communication have become an important guarantee for power supply security. In the new power system, substations, converter stations, switchgears and other fields need to realize high-security, high-reliability and high-bandwidth wireless communication within the region to ensure the effective transmission of business data for local environmental monitoring, video acquisition, intelligent inspection and remote control in these places. Among them, intelligent inspection, as an effective detection method, presents the characteristics of diversity and rapidity, such as safety inspection helmets for inspection personnel, inspection crawler robots, and drone inspections. During the movement of power inspection equipment, the detected video can be transmitted back to the control end of the data center through the power wireless LAN. The operator of the data center can further remotely control the movement of the inspection robot through the power wireless LAN based on the transmitted video; on the other hand, the inspection robot can also transmit the operating status of the detection equipment back to the data center through the power wireless LAN, and the operation and management personnel of the data center can monitor the equipment operation status in real time.

[0030] These mobile inspection devices need to transmit the data collected by the sensors they carry to the platform in real time and reliably through wireless signals, so as to facilitate the fast and effective transmission of data. In the process of equipment movement, it is inevitable to involve the switching of wireless signal coverage areas. In the switching process, switching is generally based on preset conditions, such as setting threshold values ​​for the received signal RSSI (Received Signal Strength Indicator) and related parameters RSRP (Reference Signal Receiving Power) and RSRQ (Reference Signal Receiving Power) of the received wireless base station. If the RSSI value and related parameters of the current wireless signal base station do not meet the preset threshold value, the terminal starts signal measurement and searches for a new wireless base station for access. In order to avoid the jitter of wireless signals in space and time, cross-cell switching is often carried out by taking the average or other filtering methods to smooth the RSSI value and related parameters and compare them with the preset threshold value, which causes the untimely or even lagging cross-zone switching. When the RSSI value and related parameters do not meet the preset threshold, the new base station measurement and judgment work is started. There is also a possibility that the signal quality of the cross-area handover is reduced and the transmission bandwidth is reduced because a suitable new base station cannot be found. For mobile targets, especially fast-mobility targets, the rapid change of the position relative to the original base station and the target selected base station during the movement process may cause the target selected base station to be not the optimal candidate base station during the handover. These problems will cause data transmission delays or even interruptions during the handover process.

[0031] In the new power system, mobile inspections are carried out in fixed places such as substations, converter stations, and switch stations, such as robot inspections, personnel inspections, and drone inspections. Fault inspections and data feedback are carried out according to the prescribed routes. The location of the wireless base station is relatively fixed, and the preset threshold value can be used to switch cells in advance according to the location information. However, there are speed changes during inspections, strong electromagnetic interference, indoor and outdoor environment switching, and changes in ambient temperature and humidity, which will cause changes in the RSSI received in time and space, resulting in delays and interruptions in the transmission of data during the switching process. The main solution currently used is to increase the number of wireless base station layout points and increase the signal strength in the coverage area, which greatly increases the cost of equipment application.

[0032] like Figure 1The figure shows the principle diagram of dynamically setting the switching threshold of the mobile inspection device. During the operation of the mobile inspection device, it passes through the coverage areas of base station 1, base station 2 and base station n in turn. Cell switching is required in different coverage areas. Usually, the switching threshold of the cell is set to a fixed threshold value, which will cause switching delay and thus data transmission interruption, affecting the reliability of the mobile inspection device.

[0033] Based on the above situation, the present application proposes a method for dynamically setting a switching threshold, a wireless signal switching method and related devices. The present application is described in detail below in conjunction with embodiments and drawings.

[0034] like Figure 2 As shown, it is a schematic diagram of a method for dynamically setting a switching threshold of the present application, which may include: S101, during the operation of the mobile inspection device, wireless signal index parameters of the current source base station within a preset time period are collected.

[0035] It should be noted that the preset time period can be adjusted according to actual needs, such as a few minutes, a few hours or longer, and can be set to balance the switching frequency and accuracy. The current source base station is the base station that the mobile inspection device is currently connecting to and using. The wireless signal indicator parameters can usually include received signal strength (RSSI), reference signal received power (RSRP), reference signal received quality (RSRQ), etc. These parameters can reflect the quality and strength of the wireless signal, and the wireless signal indicator parameters are collected for subsequent analysis.

[0036] S102, performing curve fitting according to the wireless signal indicator parameters of the source base station and the corresponding collection time points to obtain a source base station curve.

[0037] Through the known data points, specifically the wireless signal index parameters and the collection time points, a curve that best describes the relationship between these data points is constructed. This curve reflects the change trend of the wireless signal index parameters of the source base station over time. Through this curve, the fluctuation of the signal strength can be intuitively seen.

[0038] S103, determining the rising and falling trend of the source base station curve. If the trend is falling, executing the following steps (1) to (4): (1) Collect wireless signal indicator parameters of other base stations within a preset range within a preset time period.

[0039] Around a specific area of ​​the current source base station, search for other base stations that may be the switching target. The wireless signal index parameters of other base stations can be collected through the wireless communication module of the mobile inspection device.

[0040] (2) Curve fitting is performed based on the wireless signal indicator parameters of other base stations and the corresponding collection time points to obtain the curve of each base station.

[0041] Curve fitting is performed on each candidate base station to obtain a curve showing the change of each wireless signal indicator parameter over time for subsequent comparison and analysis.

[0042] (3) Determine the intersection points of the curves of each base station and obtain the wireless signal index parameters at the intersection points.

[0043] The intersection points are the points where the curves of different base stations intersect. These points represent the points where the signal strength of each base station is equal at different time points. At the intersection points, the wireless signal indicator parameter values ​​of each base station are recorded.

[0044] (4) Select the maximum value of the wireless signal index parameter from the wireless signal index parameters of the intersection as the switching threshold.

[0045] The switching threshold is used to determine when to switch base stations. Selecting the maximum value of the wireless signal indicator parameter as the switching threshold can ensure that better wireless signal quality can be obtained after switching to a new base station.

[0046] It should be noted that by judging the rising and falling trend of the source base station curve, it can be determined whether the wireless signal is in a stable state, gradually increasing or gradually weakening. If the rising and falling trend is unchanged or increasing, it means that the signal quality of the current source base station is good and stable, so there is no need to switch the wireless signal. If the rising and falling trend is decreasing, it means that the signal quality of the current source base station is decreasing, and you may need to consider switching to other base stations to maintain communication quality.

[0047] This application is aimed at some deficiencies of preset threshold values ​​of cell switching related parameters encountered by mobile inspection equipment in specific scenarios such as substations, converter stations, and switch stations in power scenarios. Based on the statistical learning method, during the operation of the equipment, through statistical analysis of the received signal and related parameters, combined with the real-time mobile speed, the switching point between the current wireless base station and the switching wireless base station is dynamically predicted, and the cell switching is performed quickly and effectively in real time. The various parameters at the switching point can be used as the switching threshold. When the speed of the mobile inspection equipment remains unchanged, the predicted switching time point can also be used as the switching time. Compared with the scheme of preset threshold values, the switching speed of cell reselection is greatly improved, and the influence caused by equipment running speed, electromagnetic interference, environmental switching, and weather changes is avoided. The real-time and reliability of data transmission of mobile inspection equipment in specific scenarios such as substations, converter stations, and switch stations in power scenarios is guaranteed, and the data transmission delay or interruption caused by the mobile inspection equipment crossing the coverage area of ​​the wireless base station during operation is greatly reduced.

[0048] like Figure 3As shown, it is another flowchart of the method for dynamically setting the switching threshold of the present application, and the present application is described in more detail: S201, during the operation of the mobile inspection equipment, collect data for a period of time The indicator parameters of the wireless signal of the current resident base station (ie, the source base station) include multiple point parameter information such as RSSI, RSRP or RSRQ.

[0049] It should be noted that RSSI is the received signal strength indicator, which attenuates with the increase of distance and is usually a negative value. The closer the value is to zero, the higher the signal strength. If the RSSI is continuously too low, it means that the uplink signal received by the base station is too weak, which may cause demodulation failure; if the RSSI is continuously too high, it means that the received uplink signal is too strong, and the mutual interference is too large, which also affects signal demodulation. In mobile inspection equipment, RSSI can be measured in real time through the built-in wireless signal receiver of the equipment. By analyzing the changes in RSSI values, the stability of the signal strength of the mobile inspection equipment during movement can be judged. RSRP is the average value of the signal power received on all resource elements carrying the reference signal in a certain symbol. It is a key indicator for measuring the received power of wireless signals. The range is usually between -44 and -140dBm. The larger the value, the stronger the received signal power. In mobile inspection equipment, the RSRP value can be measured in real time through the communication process with the base station. The RSRP value directly reflects the strength of the wireless signal received by the mobile inspection equipment, which is of great significance for evaluating the coverage range and signal quality of the base station. RSRQ is the reference signal reception quality, specifically the ratio of RSRP to RSSI, ranging from -3 to -19.5dB. The larger the RSRQ value, the better the signal reception quality. RSRQ is mainly used to evaluate the quality of wireless signals and serves as a reference for resource allocation and modulation selection. In mobile inspection equipment, the RSRQ value can be calculated by measuring RSRP and RSSI values ​​at the same time. The RSRQ value takes into account the signal reception power and signal strength, and can more comprehensively reflect the quality of wireless signals.

[0050] In actual applications, during operation, the mobile inspection equipment will collect multi-point parameter information such as RSSI, RSRP and RSRQ of the current base station in real time according to the preset sampling frequency and sampling duration.

[0051] S202, using multiple point parameter information such as RSSI, RSRP or RSRQ, and the corresponding acquisition time points, a regression algorithm (linear regression) is used to perform curve fitting to obtain a curve fitting function .

[0052] Specifically, the curve fitting function can be expressed as: .

[0053] in, Indicates that the power number is No. curve, Indicates time, represents the total number of powers, Indicates the power number, Indicates the sequence number of the curve.

[0054] It should be noted that by performing curve fitting through regression algorithms (such as linear regression), a curve fitting function that describes the changes of these parameters over time can be obtained. Curve fitting fits the observed data by selecting an appropriate curve type, and uses the fitted curve equation to analyze the relationship between the two variables. Linear regression is a common curve fitting method used to establish a linear relationship model between a response variable (dependent variable) and one or more independent variables.

[0055] S203, curve fitting function Taking the first-order derivative we get , and the derivative Make a judgment.

[0056] if , indicating that the trend of the curve fitted by the collected information is decreasing, that is, the mobile inspection device is moving away from the current base station and will be out of the coverage of this base station in the future. It is necessary to switch and continue to perform subsequent steps. , indicating that the trend of the curve fitted by the collected information has not changed or is increasing. There is no need to switch at present, and there is no need to perform other steps temporarily. Just continue to collect and monitor.

[0057] If the curve fitting function is linear, the first-order derivative represents the instantaneous rate of change of the curve fitting function at a certain point, that is, the slope. In other embodiments of the present application, the curve fitting function may also be nonlinear. If it is nonlinear, the corresponding derivation rule can be used for derivation. In the application scenario of mobile inspection equipment, the first-order derivative of the curve fitting function can be derived and judged to understand the changing trend of parameters such as RSSI, RSRP or RSRQ over time, thereby predicting future changes in parameter values. It is also possible to find the extreme points of the parameter values, which may correspond to the boundaries of the base station coverage range or the turning points of the signal quality, which is also of great significance for optimizing the base station layout and equipment operating parameters.

[0058] S204, start measuring parameters such as RSSI, RSRP or RSRQ of other surrounding base stations. Multi-point data collection is performed within the system, and multiple curves are fitted using the collected data. , , ..., .

[0059] S205, respectively deriving the first-order derivatives of the obtained multiple curves, and obtaining , , ..., .

[0060] S206, selecting a curve function whose first-order derivative is greater than 0.

[0061] These curve functions with first-order derivatives greater than 0 indicate that the parameter information collected by the mobile inspection device is increasing, that is, the mobile inspection device is gradually approaching these base stations. The selected curve function is expressed as .

[0062] S207, obtaining parameter information such as RSSI, RSRP or RSRQ at the intersections of multiple curves, and The corresponding time point .

[0063] Specifically, we can use the equation , get RSSI and RSRP of multiple curve intersections Or RSRQ and other parameter information, as well as the corresponding time point .

[0064] S208, selecting the largest RSSI, RSRP or RSRQ as a threshold for the base station to perform cell switching.

[0065] In addition, when the speed of the mobile inspection device remains unchanged, the time point closest to the current time can be selected as the switching time point, and then the time switching can be performed at a specific time point.

[0066] It should be noted that when the speed of the mobile inspection equipment remains unchanged, the intention when selecting the switching time point is to minimize the impact of the switching on the communication quality and user experience. The time point closest to the current time usually means that the switching operation will be performed as soon as possible, thereby reducing the dwell time under poor signal conditions. Furthermore, the multi-base station fitting curve comparison selection method ensures the selection of the optimal base station. Figure 4 As shown, it is a schematic diagram of the principle of dynamically selecting the switching threshold value and the switching time point.

[0067] In actual applications, after determining the switching time point and the threshold for the base station to switch the cell, the real-time collected data can be compared with the above switching threshold or switching time point. After the switching threshold and switching time point requirements are met, the cell switching process is started to complete the cell switching. In actual applications, the mobile inspection device sends a switching request to the currently stationed base station, indicating that it wants to switch to the target base station. After receiving the switching request, the current base station will communicate with the target base station to coordinate the switching process. At the same time, the mobile inspection device will also establish a connection with the target base station and prepare to receive signals from the target base station. When the switching process is successfully completed, the mobile inspection device will be completely served by the target base station. At this time, it can be considered that the cell switching has been completed.

[0068] In power system substations, converter stations, switchgears and other scenes, with the refinement of equipment detection, more and more information needs to be collected, and more and more mobile inspection equipment is also needed. Through the use of automated inspection equipment such as visual helmets for inspection personnel, inspection robots, and inspection drones to inspect substations, converter stations, switchgears and other scenes, it can not only greatly improve the inspection efficiency, but also improve the safety of personnel, which is of great significance in promoting the intelligent upgrade of power systems. Since mobile inspection equipment uses local LAN base stations for wireless data transmission, it will inevitably encounter the problem of switching across base stations during the movement process. Then, through dynamic curve fitting and the change of cross-base station judgment conditions, the delay problem in the switching process can be effectively reduced, the switching conditions and switching time points can be predicted in advance, and the mobile inspection equipment can be ensured to be in the optimal wireless communication environment, reducing the data communication interruption problem of mobile inspection equipment during the switching process. And through real-time dynamic measurement data, the deployment location of the base station can be effectively analyzed, the base station deployment network planning can be optimized, and the base station deployment cost can be reduced.

[0069] This application adopts regression algorithms, such as commonly used linear regression, polynomial regression and other methods, to collect multiple base station RSSI and related parameters (RSRQ, RSRP) values ​​within a certain time period collected by mobile inspection equipment in specific scenarios such as substations, converter stations, and switch stations in power scenarios as the vertical coordinate, and fit the data curve with time as the horizontal coordinate. The multiple curves after fitting are used to determine the intersection point, and the expected time for cell switching, as well as the RSSI and related parameters (RSRQ, RSRP) values ​​of the original base station and the target base station during the switching are determined by the horizontal coordinate of the determined intersection point. The time and RSSI and other related parameters (RSRQ, RSRP) values ​​are set as the threshold value for cell switching. When the mobile device reaches the specified time point or reaches the switching threshold value, the mobile device starts cell reselection for cell switching. This application sets the switching threshold in real time and dynamically to ensure that the mobile inspection equipment is in the optimal communication environment, which can optimize the base station deployment location, reduce the number of base station deployments, and reduce equipment costs. At the same time, the dynamic switching threshold formed by real-time data processing avoids parameter errors caused by weather changes, electromagnetic dynamic interference, equipment speed changes, etc., and ensures the reliability of data communication during the switching process. In addition, the use of dynamic data prediction curves to predict the switching threshold and switching time point helps to prepare for the switching in advance and reduce the time delay caused by the switching process.

[0070] like Figure 5 As shown, it is a schematic diagram of a system for dynamically setting a switching threshold of the present application, which may include: The first acquisition module is used to collect the wireless signal index parameters of the current source base station within a preset time period when the mobile inspection device is in working state; A first fitting module, used to perform curve fitting according to the wireless signal index parameters of the source base station and the corresponding collection time points to obtain a source base station curve; A judgment module, used to judge the rising and falling trend of the source base station curve; The second collection module is used to collect the wireless signal index parameters of other base stations in a preset range within a preset time period when the trend is decreasing; The second fitting curve is used to perform curve fitting according to the wireless signal index parameters of other base stations and the corresponding collection time points to obtain the curve of each base station; The intersection module is used to determine the intersection points of the curves of each base station and obtain the wireless signal index parameters of the intersection points; The threshold module is used to select the maximum value of the wireless signal indicator parameter from the wireless signal indicator parameters of the intersection as the switching threshold.

[0071] In some embodiments of the system for dynamically setting a switching threshold of the present application, if the mobile inspection device moves at a uniform speed, the time point closest to the current time among the time points corresponding to the wireless signal indicator parameters of the intersection is used as the switching time point.

[0072] In some embodiments of the switching threshold dynamic setting system of the present application, the curve fitting based on the wireless signal index parameters of the source base station and the corresponding collection time points may include calculating the curve fitting function through a linear regression algorithm based on the wireless signal index parameters of the source base station and the corresponding collection time points to obtain the source base station curve.

[0073] In some embodiments of the switching threshold dynamic setting system of the present application, the determination of the rising and falling trend of the source base station curve may include calculating the first-order derivative of the curve fitting function corresponding to the source base station curve. If the first-order derivative is less than zero, the rising and falling trend of the source base station curve is decreasing; if the first-order derivative is greater than zero, the rising and falling trend of the source base station curve is increasing.

[0074] In some embodiments of the system for dynamically setting a switching threshold of the present application, the wireless signal indicator parameter includes any one of RSSI, RSRP, and RSRQ.

[0075] Based on the above-mentioned method for dynamically setting the switching threshold, Figure 6 As shown, it is a schematic diagram of the wireless signal switching method of the present application, which may include: S301, collecting real-time wireless signal index parameters of mobile inspection equipment.

[0076] S302, comparing the real-time wireless signal indicator parameter with the switching threshold, and performing switching when the switching threshold is reached.

[0077] The switching threshold is determined by the switching threshold dynamic setting method proposed in the present application.

[0078] Correspondingly, such as Figure 7 As shown, it is a schematic diagram of the wireless signal switching system of the present application, which may include: The third acquisition module is used to collect real-time wireless signal index parameters of mobile inspection equipment; A switching module is used to compare the real-time wireless signal index parameters with the switching threshold, and perform switching when the switching threshold is reached; The switching threshold is determined by the switching threshold dynamic setting method proposed in the present application.

[0079] It should be noted that in the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the system embodiments described above are merely schematic. For example, the division of each module is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules can be combined or integrated into another device, or some features can be ignored or not executed. The module described as a separate component may or may not be physically separated. The component displayed as a module may be a physical unit or multiple physical units, that is, it may be located in one place, or it may be distributed in multiple different places. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0080] In addition, each module in each embodiment of the present invention may be integrated into a processing unit, each module may exist physically separately, or two or more modules may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0081] An embodiment of the present application also provides an electronic device, which may include one or more processors, a memory, and a communication interface.

[0082] The memory, the communication interface and the processor are coupled, for example, the memory, the communication interface and the processor may be coupled together via a bus.

[0083] The communication interface is used for data transmission with other devices. The memory stores computer program code. The computer program code includes computer instructions. When the computer instructions are executed by the processor, the electronic device executes the steps of the DNA encoding method, or the electronic device executes the steps of the switching threshold dynamic setting method, or the electronic device executes the steps of the wireless signal switching method.

[0084] Wherein, the processor can be a processor or a controller, for example, a central processing unit (CPU), a general processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the present disclosure. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of DSP and microprocessors, and the like. The processor can be used to support electronic devices to execute the method steps provided in the above embodiments.

[0085] The bus may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The above bus may be divided into an address bus, a data bus, a control bus, etc.

[0086] An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned method for dynamically setting the switching threshold are implemented, or the electronic device executes the steps of the above-mentioned wireless signal switching method.

[0087] The computer-readable storage medium involved in the present application includes random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the technical field.

[0088] For the description of the relevant parts of the wireless signal switching method, wireless signal switching system, and switching threshold dynamic setting system provided in the embodiments of the present application, please refer to the detailed description of the corresponding parts in the switching threshold dynamic setting method provided in the embodiments of the present application, which will not be repeated here. In addition, the parts of the above-mentioned technical solutions provided in the embodiments of the present application that are consistent with the implementation principles of the corresponding technical solutions in the prior art are not described in detail to avoid excessive elaboration.

[0089] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for dynamically setting a switching threshold, characterized in that: include: During the operation of the mobile inspection device, the wireless signal index parameters of the current source base station within a preset time period are collected; Perform curve fitting according to the wireless signal indicator parameters of the source base station and the corresponding collection time points to obtain the source base station curve; Determine the rising and falling trend of the source base station curve. If the trend is falling, perform the following steps: Collecting wireless signal index parameters of other base stations within a preset range within a preset time period; Perform curve fitting according to the wireless signal index parameters of other base stations and the corresponding collection time points to obtain the curve of each base station; Determine the intersection of each base station curve and obtain the wireless signal index parameters of the intersection; The maximum value of the wireless signal indicator parameter is selected from the wireless signal indicator parameters of the intersection as the switching threshold.

2. The method for dynamically setting a switching threshold according to claim 1, characterized in that: Also includes: If the mobile inspection device moves at a uniform speed, the time point closest to the current time among the time points corresponding to the wireless signal indicator parameters of the intersection is used as the switching time point.

3. The method for dynamically setting a switching threshold according to claim 1, characterized in that: The performing curve fitting according to the wireless signal indicator parameters of the source base station and the corresponding collection time points includes: According to the wireless signal index parameters of the source base station and the corresponding collection time points, the curve fitting function is calculated by a linear regression algorithm to obtain the source base station curve.

4. The method for dynamically setting a switching threshold according to claim 1, characterized in that: The determining the rising and falling trend of the source base station curve includes: The first-order derivative of the curve fitting function corresponding to the source base station curve is calculated. If the first-order derivative is less than zero, the rising and falling trend of the source base station curve is descending; if the first-order derivative is greater than zero, the rising and falling trend of the source base station curve is ascending.

5. The method for dynamically setting a switching threshold according to claim 1, characterized in that: The wireless signal indicator parameter includes any one of RSSI, RSRP, and RSRQ.

6. A wireless signal switching method, characterized in that: include: Collect real-time wireless signal index parameters of mobile inspection equipment; Compare the real-time wireless signal index parameters with the switching threshold, and perform switching when the switching threshold is reached; The switching threshold is determined by using the switching threshold dynamic setting method described in any one of claims 1 to 5.

7. A wireless signal switching system, characterized in that: include: The third acquisition module is used to collect real-time wireless signal index parameters of mobile inspection equipment; A switching module is used to compare the real-time wireless signal index parameters with the switching threshold, and perform switching when the switching threshold is reached; The switching threshold is determined by using the switching threshold dynamic setting method described in any one of claims 1 to 5.

8. A switching threshold dynamic setting system, characterized in that: include: The first acquisition module is used to collect the wireless signal index parameters of the current source base station within a preset time period when the mobile inspection device is in working state; A first fitting module, used to perform curve fitting according to the wireless signal index parameters of the source base station and the corresponding collection time points to obtain a source base station curve; A judgment module, used to judge the rising and falling trend of the source base station curve; The second collection module is used to collect the wireless signal index parameters of other base stations in a preset range within a preset time period when the trend is decreasing; The second fitting curve is used to perform curve fitting according to the wireless signal index parameters of other base stations and the corresponding collection time points to obtain the curve of each base station; The intersection module is used to determine the intersection points of the curves of each base station and obtain the wireless signal index parameters of the intersection points; The threshold module is used to select the maximum value of the wireless signal indicator parameter from the wireless signal indicator parameters of the intersection as the switching threshold.

9. The switching threshold dynamic setting system according to claim 8, characterized in that: Also includes: If the mobile inspection device moves at a uniform speed, the time point closest to the current time among the time points corresponding to the wireless signal indicator parameters of the intersection is used as the switching time point.

10. The switching threshold dynamic setting system according to claim 8, characterized in that: The performing curve fitting according to the wireless signal indicator parameters of the source base station and the corresponding collection time points includes: According to the wireless signal index parameters of the source base station and the corresponding collection time points, the curve fitting function is calculated by a linear regression algorithm to obtain the source base station curve.

11. The switching threshold dynamic setting system according to claim 8, characterized in that: The determining the rising and falling trend of the source base station curve includes: The first-order derivative of the curve fitting function corresponding to the source base station curve is calculated. If the first-order derivative is less than zero, the rising and falling trend of the source base station curve is descending; if the first-order derivative is greater than zero, the rising and falling trend of the source base station curve is ascending.

12. The switching threshold dynamic setting system according to claim 8, characterized in that: The wireless signal indicator parameter includes any one of RSSI, RSRP, and RSRQ.

13. An electronic device, characterized in that: include: A memory and one or more processors; the memory is coupled to the processor; wherein the memory stores computer program code, the computer program code includes computer instructions, and when the computer instructions are executed by the processor, the electronic device executes the steps of the method for dynamically setting the switching threshold as described in any one of claims 1 to 5, or the electronic device executes the steps of the wireless signal switching method as described in claim 6.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the method for dynamically setting the switching threshold are implemented as described in any one of claims 1 to 5, or when the computer program is executed by the processor, the steps of the wireless signal switching method are implemented as described in claim 6.

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