WO2022215131A1 - 通信設計支援装置、通信設計支援方法およびプログラム - Google Patents
通信設計支援装置、通信設計支援方法およびプログラム Download PDFInfo
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Definitions
- the present invention relates to technology that supports wireless communication design according to the user's purpose of use.
- the quality of wireless communication changes from moment to moment depending on the situation, and the quality may not be stable due to the influence of the surrounding environment such as users and base stations. Therefore, in order to enable wireless communication to be used with optimal quality according to the user's purpose, there is a need for technology that supports the design of wireless communication.
- the disclosed technology aims to support the design of wireless communication according to the user's purpose of use.
- the disclosed technology includes an acquisition unit that acquires point cloud data of a structure and measurement data of radio wave intensity, and structure data that indicates the shape and material of the structure based on the result of object recognition of the point cloud data.
- a structure data generation unit to generate;
- a propagation loss calculation unit for calculating a propagation loss based on measurement data of radio wave intensity in an environment including the structure; and a correspondence between the structure data and the propagation loss data.
- an output unit for outputting data.
- FIG. 1 is a diagram showing an example of the overall configuration of a communication design support system and an example of a functional configuration of a communication design support device;
- FIG. 10 is a flow chart showing an example of the flow of communication design support processing; 4 is a flowchart showing an example of the flow of 3D CAD data generation processing; 9 is a flowchart showing an example of the flow of ray tracing model tuning processing;
- FIG. 11 is a flowchart showing an example of the flow of statistical model tuning processing;
- FIG. FIG. 11 is a flowchart showing an example of the flow of environment label selection processing based on threshold determination;
- FIG. 10 is a flow chart showing an example of the flow of classifier learning processing.
- FIG. 10 is a flow chart showing an example of the flow of classifier learning processing.
- FIG. 11 is a flowchart showing an example of the flow of environment label selection processing based on classifier determination;
- FIG. 6 is a flowchart showing an example of the flow of frequency correction processing; It is a figure which shows the hardware configuration example of a computer.
- 6 is a flow chart showing an example of the flow of communication design support processing according to the first embodiment;
- 10 is a flow chart showing an example of the flow of communication design support processing according to the second embodiment;
- FIG. 11 is a flow chart showing an example of the flow of communication design support processing according to the third embodiment;
- FIG. FIG. 16 is a flow chart showing an example of the flow of communication design support processing according to the fourth embodiment;
- FIG. FIG. 16 is a flow chart showing an example of the flow of communication design support processing according to the fifth embodiment;
- FIG. FIG. 16 is a flow chart showing an example of the flow of communication design support processing according to the sixth embodiment;
- the communication design support system 1 is a system that supports communication design work in various processes such as introduction, investigation, and proposal of a wireless communication system.
- FIG. 1 is a diagram showing an example of the overall configuration of a communication design support system and an example of the functional configuration of a communication design support device.
- a communication design support system 1 includes a communication design support device 10 , an imaging device 20 , a distance measuring device 30 , and a wireless communication device 40 .
- the communication design support device 10 includes a site survey unit 11, an environment label selection unit 12, a data processing unit 13, a radio wave intensity estimation unit 14, and a propagation model storage unit 15.
- the photographing device 20 is, for example, a camera, which photographs the communication usage environment, acquires image data, and transmits the image data to the communication design support device 10 .
- the distance measuring device 30 is, for example, a sensor, LiDAR, etc., measures the distance between installed objects, inner walls, etc. in the communication usage environment, and transmits the measurement data to the communication design support device 10 .
- the wireless communication device 40 performs wireless communication in the communication usage environment, acquires information indicating the wireless communication specification such as received power, and transmits the information to the communication design support device 10 .
- the communication design support device 10 includes a site survey section 11 , an environment label selection section 12 , a data processing section 13 , a radio wave intensity estimation section 14 and a propagation model storage section 15 .
- the propagation model storage unit 15 stores a propagation model that defines the process of estimating the radio wave intensity of wireless communication.
- the propagation model uses various models such as the ray trace model 101 and the statistical model 102 . Note that the propagation model storage unit 15 may store either the ray tracing model 101 or the statistical model 102, or may store both and select and use either one.
- the ray tracing model 101 is a kind of propagation model for estimating radio wave intensity by means of a technique called a ray tracing method, which simulates an image observed at a certain point by tracking radio waves.
- the statistical model 102 is a kind of propagation model that estimates radio wave intensity by statistical calculation based on the distance between transmission and reception, electric field intensity, and the like.
- the site survey unit 11 acquires various types of information from the photographing device 20, the distance measuring device 30, the wireless communication device 40, etc., and data indicating the structure of the communication environment such as buildings and installations, such as 3D CAD (Three Dimensional Computer Aided Data). Design) data.
- 3D CAD Three Dimensional Computer Aided Data
- the environment label selection unit 12 assigns an environment label to the propagation model based on various information acquired from the photographing device 20, the distance measuring device 30, the wireless communication device 40, etc., the data indicating the structure generated by the site survey unit 11, and the like. to select.
- the environment label is data indicating the classification of the characteristics of the communication environment.
- the data processing unit 13 applies techniques such as machine learning to tune various propagation models stored in the propagation model storage unit 15 .
- the radio wave intensity estimation unit 14 estimates the radio wave intensity in the communication usage environment to be designed by applying various propagation models.
- FIG. 2 is a flowchart showing an example of the flow of communication design support processing. Note that specific operations according to various use cases will be described in Examples 1 to 4, which will be described later.
- the communication design support device 10 starts communication design support processing in response to the user's operation.
- the site survey unit 11 acquires relative coordinate information, point cloud data, and radio wave intensity data based on the data received from each device (step S11).
- the relative coordinate information is information indicating the relative positional relationship of objects, equipment, etc. in the communication environment.
- Point cloud data is data representing three-dimensional coordinates of a large number of points representing the position and shape of the surface of an object in the communication environment.
- the radio wave intensity data is data indicating the radio wave intensity at each point in the communication environment.
- the site survey unit 11 applies a technique such as SLAM (Simultaneous Localization and Mapping) to the image captured by the imaging device 20 or the measurement data measured by the distance measuring device 30 to determine the coordinates of the design target object, equipment, etc. is obtained as relative coordinate information.
- SLAM Simultaneous Localization and Mapping
- the site survey unit 11 may simply receive relative coordinate information to which techniques such as SLAM are applied.
- the site survey unit 11 analyzes the image captured by the imaging device 20 and acquires point cloud data.
- the site survey unit 11 may simply receive point cloud data as a result of image analysis.
- the site survey unit 11 also extracts radio wave intensity data from the measurement data received from the wireless communication device 40 .
- the site survey unit 11 converts the radio wave intensity data into propagation loss data (step S12). For example, the site survey unit 11 calculates the propagation loss PL using the following formula (1).
- Propagation loss PL Output Pt - Transmitting power loss Lt + Transmitting antenna gain Gt + Receiving antenna gain Gr - Receiving power loss Lr - Radio wave intensity Pr (1)
- step S13 the site survey unit 11 converts the point cloud data into 3D CAD data (step S13).
- 3D CAD data is data representing the shape of an object using a three-dimensional coordinate system. The processing from step S11 to step S13 may not be performed in this order. Details of these processes will be described later.
- the environment label selection unit 12 selects an environment label to be assigned to the propagation model based on the set of 3D CAD data with coordinate information and propagation loss data (step S14). Specifically, the environment label selection unit 12 extracts feature values (for example, structure density if the communication environment is a factory) from 3D CAD data with reference to past models, and determines the environment to be assigned by threshold determination. Choose a label. Alternatively, the environment label selection unit 12 may select an environment label to be assigned using a classification machine learning device having an automatic propagation environment identification function. Details of these processes will be described later.
- feature values for example, structure density if the communication environment is a factory
- the propagation model can also be considered to be a different propagation model for each environmental label.
- the selection of the environment label to be given can also be said to be the selection of the propagation model.
- the data processing unit 13 tunes the parameters of the propagation model using the propagation loss data (step S15). Specifically, data processing unit 13 updates parameters of ray tracing model 101 and statistical model 102 . By tuning the propagation model according to the communication usage environment, it is possible to improve the estimation accuracy of the radio wave intensity. Details of the processing in step S15 will be described later.
- the radio wave intensity estimation unit 14 receives the input of the frequency band of the estimation system and calculates the propagation loss PL with respect to the distance (step S16).
- An estimation system is a communication usage environment system to be estimated. Specifically, the radio wave intensity estimating unit 14 inputs the frequency band to the propagation model (ray trace model 101 or statistical model 102) to which the environmental label is assigned, and performs simulation to calculate the propagation loss PL. Then, the radio wave intensity estimation unit 14 calculates the radio wave intensity Pr by the following equation (2) based on the calculated propagation loss PL (step S17).
- Radio field intensity Pr Output Pt - Transmission power loss Lt + Transmission antenna gain Gt + Reception antenna gain Gr - Reception power loss Lr - Propagation loss PL (2)
- FIG. 3 is a flowchart showing an example of the flow of 3D CAD data generation processing.
- the 3D CAD data generation processing is the details of the processing from step S11 to step S13 described above.
- the site survey unit 11 collects measurement data from each device (step S21). Next, the site survey unit 11 executes the first to third processing flows in parallel. Note that the site survey unit 11 may process all or part of the first to third processing flows in an arbitrary order.
- the site survey unit 11 merges the point cloud data (step S221). Specifically, when the site survey unit 11 acquires point cloud data from a plurality of devices, the site survey unit 11 translates and rotates the coordinates from the positions of the three reference markers in order to match the respective coordinate systems. merge. Next, the site survey unit 11 separates layers of ceilings, floors, walls and other structures from the point cloud distribution (step S222). This is because the distribution of the amount of acquired point cloud data differs with respect to the surface area.
- the site survey unit 11 filters the point cloud data (step S223). Specifically, the site survey unit 11 performs filtering by downsampling using a "Voxel Grid Filter" or the like. When the collected measurement data is image data, the site survey unit 11 may model the pixels of the image as corresponding to the point cloud. Next, the site survey unit 11 divides the point group for each structure by the region growing method (step S224).
- the site survey unit 11 recognizes the object by CNN (Convolutional Neural Network) and adds typical material information of the recognized object (step S225). Subsequently, the site survey unit 11 executes plane detection by RANSAC (Random sample consensus) (step S234). In the process of step S234, the site survey unit 11 may subdivide the plane into plane elements by Delaunay triangulation after detecting the plane.
- This first processing flow generates 3D CAD data representing various structures including structures attached to the building such as ceilings, floors, walls, etc. and installations inside the building.
- the site survey unit 11 calculates the average received power for each measurement point based on the received measurement data such as radio wave intensity (step S231). Then, the site survey unit 11 converts the average received power to the receiving antenna end power (step S232), subtracts the gain of the receiving antenna (step S233), and subtracts the transmission EIRP (Equivalent Isotropic Radiated Power) (step S234). and convert to propagation loss data.
- the site survey unit 11 converts the average received power to the receiving antenna end power (step S232), subtracts the gain of the receiving antenna (step S233), and subtracts the transmission EIRP (Equivalent Isotropic Radiated Power) (step S234). and convert to propagation loss data.
- the site survey unit 11 converts the average received power to the receiving antenna end power (step S232), subtracts the gain of the receiving antenna (step S233), and subtracts the transmission EIRP (Equivalent Isotropic Radiated Power) (step S234). and convert to propagation loss data.
- EIRP Equivalent I
- the site survey unit 11 extracts coordinate data by SLAM (step S241).
- the site survey unit 11 integrates the results of the first to third processing flows and acquires a set of 3D CAD data with coordinate information and propagation loss data (step S25).
- CAD data such as buildings and structures are used to estimate propagation characteristics.
- an indoor environment such as a factory, there are cases where there is no data indicating the layout of the structure, and in such cases it is necessary to manually create a CAD of the environment.
- 3D CAD data is automatically generated based on the measurement data, so wireless communication can be designed without relying on the user's skill.
- the site survey unit 11 includes an acquisition unit that acquires the point cloud data of the structure and the measurement data of the radio wave intensity, and an acquisition unit that performs object recognition and material determination of the point cloud data, and a structure that indicates the shape and material of the structure.
- a structure data generation unit that generates data
- a propagation loss calculation unit that calculates propagation loss based on measurement data of radio wave intensity in an environment including the structure, and data that associates the structure data with the propagation loss data.
- an output unit that outputs the .
- the structure data that indicates the shape and material of the structure contains information related to the quality of wireless communication, so it can be said that it is data suitable for wireless communication propagation simulation.
- the site survey unit 11 further includes an extraction unit that extracts coordinate data by SLAM.
- step S ⁇ b>15 the data processing unit 13 tunes the ray tracing model 101 or the statistical model 102 .
- FIG. 4 is a flowchart showing an example of the flow of ray tracing model tuning processing.
- the data processing unit 13 acquires a set of 3D CAD data having the coordinate information acquired by the process of step S26 of the 3D CAD data generation process described above and propagation loss data (step S31). Let the propagation loss data be (X, Y, Z, PL meas ). In addition, when the frequency band of the wireless standard to be measured and the frequency band of the wireless standard to be estimated are different, it is necessary to estimate the frequency characteristics in the data processing unit 13, and PL meas is propagation loss data of two or more different frequency bands. need to get
- the data processing unit 13 calculates the electric field intensity E for each relative coordinate by ray tracing based on the following formula (step S32).
- the reflection coefficient R has frequency characteristics, and the reflection coefficient varies depending on the relationship between the material, the shape of the structure, and the wavelength.
- the parameter ⁇ is a correction coefficient for correcting frequency characteristics.
- the data processor 13 calculates the propagation loss PL pred from the electric field strength E based on the following equation (step S33).
- the data processing unit 13 calculates a parameter ⁇ that minimizes the optimization function at each coordinate (step S34).
- the optimization function is eg ⁇ (PL meas ⁇ PL pred ) 2 .
- PL measure uses propagation loss data of two or more different frequency bands.
- FIG. 5 is a flowchart showing an example of the flow of statistical model tuning processing.
- the data processing unit 13 acquires a set of 3D CAD data and propagation loss data having the coordinate information acquired by the process of step S26 of the 3D CAD data generation process described above (step S41). Let the propagation loss data be (X, Y, Z, PL meas ). In addition, when the frequency band of the wireless standard to be measured and the frequency band of the wireless standard to be estimated are different, it is necessary to estimate the frequency characteristics in the data processing unit 13, so PL measure is the propagation loss of two or more different frequency bands. Data.
- the data processing unit 13 calculates the transmission/reception distance d for each relative coordinate (step S42). Then, the data processing unit 13 calculates the propagation loss PL pred from the electric field strength E based on the following equation (step S43).
- the parameter ⁇ has frequency characteristics and is a correction coefficient that corrects the frequency characteristics.
- the data processing unit 13 calculates parameters ⁇ , ⁇ , ⁇ that minimize the optimization function at each coordinate (step S44).
- PL meas is propagation loss data for two or more different frequency bands.
- the rate is calculated based on the results of a simulation based on a set of relative coordinates, 3D CAD data, and propagation loss data obtained by a site survey, and the propagation loss data obtained in the usage environment.
- the race parameter (effective reflection coefficient) or each coefficient of the statistical model is optimized using the radio wave intensity estimation accuracy as an index, and the propagation model is tuned according to the usage environment. This allows the characterization of location-specific and different frequency bands to be evaluated.
- the data processing unit 13 includes an acquisition unit that acquires data in which the structure data including the coordinate data and the data indicating the propagation loss are associated with each other, and parameters that update the parameters of the propagation model based on the acquired data. It can also be said to include an update part. It can be said that the parameter updating unit reflects the frequency characteristics by applying the propagation model to calculate the electric field intensity and updating the parameter to minimize the propagation loss based on the calculated electric field intensity.
- step S ⁇ b>14 the environment label selection unit 12 tunes the ray tracing model 101 or the statistical model 102 .
- FIG. 6 is a flowchart showing an example of the flow of environment label selection processing based on threshold determination.
- the environment label selection unit 12 acquires a set of 3D CAD data and propagation loss data having coordinate information acquired by the process of step S26 of the 3D CAD data generation process described above (step S51). Next, the environment label selection unit 12 calculates the two-dimensional occupation rate X (%) and average height (m) of the structure from the 3D CAD data (step S52). Next, the environment label selection unit 12 compares predetermined thresholds X 0 and X and base station antenna heights H BS and H, and assigns a label (step S53). Specifically, it is determined as follows.
- FIG. 7 is a flowchart showing an example of the flow of classifier learning processing.
- the environment label selection unit 12 acquires sets of 3D CAD data having coordinate information and propagation loss data acquired at a plurality of locations (step S61).
- the environment label selection unit 12 calculates the two-dimensional occupation ratio X (%) and average height (m) of the structure from the 3D CAD data (step S62).
- the environment label selection unit 12 generates a set of propagation loss PL, two-dimensional occupation rate X (%), and average height H (m) for each location (step S63).
- the environment label selection unit 12 generates a classifier by classification-type machine learning, and assigns a label to the generated group (step S64).
- the machine learning method may be a classification type learner, and may be, for example, the K-nearest neighbor method, SVM (support vector machine), linear discriminant method, or the like.
- FIG. 8 is a flowchart showing an example of the flow of environment label selection processing based on classifier determination.
- the environment label selection unit 12 acquires a set of 3D CAD data with coordinate information and propagation loss data acquired at a place to be estimated (step S71). Next, the environment label selection unit 12 calculates the two-dimensional occupation rate X (%) and average height (m) of the structure from the 3D CAD data (step S72). Subsequently, the environment label selection unit 12 inputs a set of the propagation loss PL, the two-dimensional occupation rate X (%), and the average height H (m) to the classifier (step S73). Then, the environment label selection unit 12 determines in which label the data set of the place to be estimated belongs (step S74).
- the communication design support device 10 by assigning an environment label according to the usage environment, the same effect as selecting a propagation model according to the usage environment can be obtained.
- the environment label selection unit 12 includes an acquisition unit that acquires data in which structure data including coordinate data and data indicating propagation loss are associated with each other, and a structure shown in the structure data based on the acquired data. and a selection unit that selects data indicating the classification of the characteristics of the communication environment in the object.
- the acquisition unit further acquires information indicating the height of the antenna of the base station
- the selection unit calculates the occupancy rate of the structure and the statistical value of the height of the structure, determines the predetermined threshold value and the occupancy rate and the comparison result between the antenna height and the statistical value, the data indicating the classification of the characteristics of the communication environment is selected.
- the selection unit may calculate the occupancy rate of the structure and the statistic value of the height of the structure, input them to the classifier, and select data indicating the classification of the characteristics of the communication environment. .
- the environment label selection unit 12 further includes a learning unit that learns a classifier by classification-type machine learning.
- step S16 the radio wave intensity estimator 14 calculates the propagation loss PL.
- FIG. 9 is a flowchart showing an example of the flow of frequency correction processing.
- the radio wave intensity estimation unit 14 inputs the frequency band of the estimation system to the propagation model tuned by the data processing unit 13 (step S81). Then, the propagation loss output from the propagation model is obtained (step S82).
- channel data sensed from existing facilities is calibrated to propagation loss, and frequency-dependent parameters (for example, , reflection coefficient in ray tracing) is tuned (tuned by the data processing unit 13).
- frequency-dependent parameters for example, , reflection coefficient in ray tracing
- the radio wave intensity can be estimated by inputting a newly established frequency (for example, a radio standard requiring a license) into the tuned ray trace model 101 or the statistical model 102 and simulating the propagation loss.
- the radio wave intensity estimation unit 14 includes an acquisition unit that acquires data in which structure data including coordinate data and data indicating propagation loss in a plurality of frequency bands are associated with each other, and a frequency band for which radio wave intensity is to be estimated. It can also be said that it includes an input receiving unit that receives an input, and an estimating unit that inputs a frequency band to the propagation model and estimates the propagation loss.
- the radio wave intensity estimation unit 14 obtains a two-dimensional ray trace from the radio wave transmission point to the reception point in order to speed up the estimation process. , and the height information of the reception point, a three-dimensional ray trace corresponding to the two-dimensional ray trace may be obtained. This makes it possible to search for the main ray, suppressing deterioration in accuracy and speeding up the processing compared to finding the three-dimensional ray trace from the beginning.
- the radio wave intensity estimation unit 14 estimates the width, height, shape, position, etc. of each surface of objects (structures, buildings, etc.) in the target area. may be converted into two-dimensional mesh data. Since the mesh data has the format of image data, it has the feature that it can be read and processed at high speed using a GPU (Graphics Processing Unit).
- GPU Graphics Processing Unit
- the communication design support apparatus 10 includes a propagation model storage unit that stores a propagation model, an acquisition unit that acquires point cloud data of a structure and measurement data of radio wave intensity in multiple frequency bands, and a propagation model based on the acquired data. It can be said that a parameter updater that updates the parameters of the model and an estimator that estimates the propagation loss based on the propagation model are provided. This makes it possible to implement communication design that does not rely on the skill of the user.
- the communication design support apparatus 10 can be realized, for example, by causing a computer to execute a program describing the processing contents described in this embodiment.
- the above program can be recorded on a computer-readable recording medium (portable memory, etc.), saved, or distributed. It is also possible to provide the above program through a network such as the Internet or e-mail.
- FIG. 10 is a diagram showing a hardware configuration example of the computer.
- the computer of FIG. 10 has a drive device 1000, an auxiliary storage device 1002, a memory device 1003, a CPU 1004, an interface device 1005, a display device 1006, an input device 1007, an output device 1008, etc., which are connected to each other via a bus B, respectively.
- a program that implements the processing in the computer is provided by a recording medium 1001 such as a CD-ROM or memory card, for example.
- a recording medium 1001 such as a CD-ROM or memory card
- the program is installed from the recording medium 1001 to the auxiliary storage device 1002 via the drive device 1000 .
- the program does not necessarily need to be installed from the recording medium 1001, and may be downloaded from another computer via the network.
- the auxiliary storage device 1002 stores installed programs, as well as necessary files and data.
- the memory device 1003 reads and stores the program from the auxiliary storage device 1002 when a program activation instruction is received.
- the CPU 1004 implements functions related to each unit described in this embodiment according to programs stored in the memory device 1003 .
- the interface device 1005 is used as an interface for connecting to the network.
- a display device 1006 displays a GUI or the like by a program.
- An input device 1007 is composed of a keyboard, a mouse, buttons, a touch panel, or the like, and is used to input various operational instructions.
- the output device 1008 outputs the calculation result. Note that the communication design support apparatus 10 may not include either or both of the display device 1006 and the input device 1007 .
- Example 1 to 6 will be described below as specific examples of the technology according to the present embodiment. In addition, each example from Example 1 to Example 6 can be suitably combined and implemented.
- Example 1 In Example 1, for the purpose of automating local survey work, the local person in charge uses a tablet terminal such as a smartphone to take pictures, acquire Lidar, and measure the radio standard radio wave intensity for measurement while moving around the site. do.
- the communication design support device 10 creates and displays 3D CAD data from the measurement results.
- FIG. 11 is a flowchart showing an example of the flow of communication design support processing according to the first embodiment.
- the site survey unit 11 acquires relative coordinate information, point cloud data, and radio wave intensity data based on the input information (step S91). Since the point cloud data, the radio field intensity, and the coordinates are acquired by different modules, they are collated by time stamps. Subsequently, based on the wireless standard information, the site survey unit 11 refers to the reception power-reception antenna end power conversion table of the measuring device, transmission EIRP information, etc., and converts the radio wave intensity data into propagation loss data (step S92). ). Next, the site survey unit 11 converts the point cloud data into 3D CAD data (step S93).
- the site survey unit 11 displays a set of 3D CAD data with coordinate information and propagation loss data (step S94).
- Local personnel or sales/SE personnel can refer to the created 3D CAD data and propagation loss data sets, or call them for use in design.
- Example 2 In the second embodiment, an example is shown in which a local person in charge simply estimates the propagation quality of a wireless standard different from that at the time of measurement based on the measurement result of the wireless standard for measurement, and utilizes it for estimating the scale of equipment and the like.
- FIG. 12 is a flowchart showing an example of the flow of communication design support processing according to the second embodiment.
- the user such as the local person in charge enters the estimated base station location and terminal station design conditions (eg, location information), wireless standards used for measurement and estimation, and account information.
- the user inputs account information, inputs information such as 2.4 GHz WLAN, 5 GHz WLAN, and 60 GHz WiGig as wireless standards for measurement, and inputs information such as 4.8 GHz L5G and 28 GHz L5G as wireless standards for estimation. .
- the environment label selection unit 12 calculates the two-dimensional occupation rate X (%) and average height (m) of the structure from the 3D CAD data (step S101). Next, the environment label selection unit 12 compares predetermined thresholds X 0 and X and base station antenna heights H BS and H, and assigns a label (step S102).
- the radio wave intensity estimating unit 14 the statistical model and the ray trace model are significantly different in the characteristics of the calculation time and output propagation quality information.
- the raytrace model can estimate the path loss for each location, whereas the statistical model can only estimate the change of the path loss over distance. However, the ray trace model has the characteristic of requiring more computation time than the statistical model. Therefore, a statistical model is used when simply estimating the facility scale, etc.
- the data processing unit 13 tunes the parameters of the statistical model using the propagation loss data (step S103). Subsequently, the radio wave intensity estimation unit 14 receives the input of the base station-terminal distance and the frequency band of the estimation system, and calculates the propagation loss PL with respect to the distance (step S104). The radio wave intensity estimation unit 14 calculates the radio wave intensity Pr based on the calculated propagation loss PL (step S105).
- the local person in charge or the sales/SE person in charge can design or estimate based on the estimated radio field strength Pr.
- Example 3 the person in charge of operation and design of the radio equipment estimates the propagation quality of the radio standard different from that at the time of measurement for each designated terminal station position based on the measurement result of the radio standard for measurement, and determines the radio parameter.
- a design example is shown.
- FIG. 13 is a flowchart showing an example of the flow of communication design support processing according to the third embodiment.
- the user such as the local person in charge enters the estimated base station and terminal station design conditions (for example, location information, etc.), wireless standards used for measurement and estimation, and account information.
- the user inputs account information, inputs information such as 2.4 GHz WLAN, 5 GHz WLAN, and 60 GHz WiGig as wireless standards for measurement, and inputs information such as 4.8 GHz L5G and 28 GHz L5G as wireless standards for estimation. .
- the environment label selection unit 12 calculates the two-dimensional occupation ratio X (%) and the average height (m) of the structure from the 3D CAD data (step S111). Next, the environment label selection unit 12 compares predetermined thresholds X 0 and X and base station antenna heights H BS and H, and assigns a label (step S112).
- the radio wave intensity estimation unit 14 uses a ray trace model that can be estimated for each terminal station position, the data processing unit 13 tunes the parameters of the ray trace model using the propagation loss data (step S113). Subsequently, the radio wave intensity estimation unit 14 receives the input of the base station-terminal distance and the frequency band of the estimation system, and calculates the propagation loss PL with respect to the distance (step S114). The radio wave intensity estimation unit 14 calculates the radio wave intensity Pr based on the calculated propagation loss PL (step S115).
- Example 4 shows an example in which a local person in charge or a sales/SE person in charge determines in advance whether or not a system change is necessary in a wireless standard operation phase in an indoor local area.
- FIG. 14 is a flowchart showing an example of the flow of communication design support processing according to the fourth embodiment.
- the site survey unit 11 acquires relative coordinate information, point cloud data, and radio wave intensity data (step S121). Next, the site survey unit 11 converts the radio wave intensity data into propagation loss data (step S122). Subsequently, the site survey unit 11 converts the point cloud data into 3D CAD data (step S123). Next, the environment label selection unit 12 calculates the two-dimensional occupation ratio X (%) and average height (m) of the structure from the 3D CAD data (step S124). The environment label selection unit 12 compares predetermined thresholds X 0 and X and base station antenna heights H BS and H, and assigns a label (step S125).
- the data processing unit 13 uses the propagation loss data to tune the parameters of the statistical model (step S126). Subsequently, the radio wave intensity estimation unit 14 receives the input of the base station-terminal distance and the frequency band of the estimation system, and calculates the propagation loss PL with respect to the distance (step S127). The radio wave intensity estimation unit 14 calculates the radio wave intensity Pr based on the calculated propagation loss PL (step S128).
- the communication design support apparatus 10 may use 3D CAD data of the corresponding area manually edited by the user, instead of the processing from step S121 to step S123 described above.
- the site survey unit 11 may have a function of accepting editing of 3D CAD data by a user.
- the local person in charge or the sales/SE person in charge can judge whether it is necessary to change the design of the wireless standard in operation based on the estimated radio field strength Pr.
- a fifth embodiment shows an example of estimating the propagation quality of a new wireless standard when an indoor local area is newly established (factory, etc.).
- FIG. 15 is a flowchart showing an example of the flow of communication design support processing according to the fifth embodiment.
- a user such as a local person in charge or a sales/SE person in charge creates 3D CAD data from the layout data of the new environment and activates the environment label selection unit 12 .
- the environment label selection unit 12 calculates the two-dimensional occupation rate X (%) and the average height (m) of the structure from the 3D CAD data (step S131).
- the environment label selection unit 12 compares predetermined thresholds X 0 and X and base station antenna heights H BS and H, and assigns a label (step S132).
- the data processing unit 13 extracts the accumulated measurement data of the corresponding label (step S133).
- the data processing unit 13 tunes the parameters of the statistical model using the propagation loss data (step S134).
- the radio wave intensity estimation unit 14 receives the input of the base station-terminal distance and the frequency band of the estimation system, and calculates the propagation loss PL with respect to the distance (step S135).
- the radio wave intensity estimation unit 14 calculates the radio wave intensity Pr based on the calculated propagation loss PL (step S136).
- the local person in charge or the sales/SE person in charge can estimate the propagation quality of the new wireless standard based on the estimated radio field strength Pr, and use it for estimation, sales, design, etc.
- Example 6 is an example of estimating the propagation quality of the wireless standard and using it for estimating the size of the facility, etc. when there is no layout data and the wireless standard cannot be measured when a new indoor local area is established (factory, etc.). indicates
- FIG. 16 is a flow chart showing an example of the flow of communication design support processing according to the sixth embodiment.
- a local person in charge or a sales/SE person in charge manually creates a typical indoor local area environment as 3D CAD data and activates the environment label selection unit 12 .
- the environment label selection unit 12 calculates the two-dimensional occupation rate X (%) and average height (m) of the structure from the 3D CAD data (step S141).
- the environment label selection unit 12 compares predetermined thresholds X 0 and X and base station antenna heights H BS and H, and assigns a label (step S142).
- the radio wave intensity estimation unit 14 calculates the propagation loss PL using a ray trace model that can be estimated for each terminal station position (step S143).
- the data processing unit 13 tunes the parameters of the statistical model using the calculated propagation loss data (step S144).
- the radio wave intensity estimation unit 14 receives the input of the base station-terminal distance and the frequency band of the estimation system, and calculates the propagation loss PL with respect to the distance (step S145).
- the radio wave intensity estimation unit 14 calculates the radio wave intensity Pr based on the calculated propagation loss PL (step S146).
- each function unit site survey unit 11, environment label selection unit 12, data processing unit 13, and radio wave intensity estimation unit 14
- a function appropriately selected according to a user's operation is executed.
- This specification discloses at least a communication design support apparatus, a communication design support method, and a program according to the following items.
- (Section 1) an acquisition unit that acquires point cloud data of a structure and measurement data of radio wave intensity; a structure data generation unit that generates structure data indicating the shape and material of the structure based on the object recognition result of the point cloud data; a propagation loss calculation unit that calculates a propagation loss based on measurement data of radio wave intensity in an environment including the structure; an output unit that outputs data in which the structure data and the propagation loss data are associated, Communication design support device.
- the structure data generation unit identifies the shape and material of the structure by plane detection, The communication design support device according to item 1.
- the structure data generation unit subdivides the plane into plane elements by Delaunay triangulation after detecting the plane,
- the communication design support device according to item 2. (Section 4) further comprising an extraction unit for extracting coordinate data based on data obtained by photographing the structure;
- the output unit outputs data in which the structure data including coordinate data and the propagation loss data are associated with each other.
- the communication design support device according to any one of items 1 to 3.
- (Section 5) A communication design support method executed by a computer, obtaining point cloud data of the structure and measurement data of radio wave intensity; generating structure data indicating the shape and material of the structure based on the object recognition result of the point cloud data; calculating a propagation loss based on measurement data of radio wave intensity in an environment including the structure; and outputting data in which the structure data and the propagation loss data are associated with each other; Communication design support method.
- (Section 6) A program for causing a computer to function as the communication design support device according to any one of items 1 to 4.
- Communication design support system 10
- Communication design support device 11
- Site survey unit 12
- Environmental label selection unit 13
- Data processing unit 14
- Radio wave intensity estimation unit 15
- Propagation model storage unit 20
- Imaging device 30
- Distance measuring device 40
- Wireless communication device 101
- Ray trace model 102
- Statistics Model 1000 Drive device 1001
- Recording medium 1002
- Auxiliary storage device 1003
- Memory device 1004
- CPU 1005 interface device 1006 display device 1007 input device 1008 output device
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
図1は、通信設計支援システムの全体構成例および通信設計支援装置の機能構成例を示す図である。通信設計支援システム1は、通信設計支援装置10と、撮影装置20と、測距装置30と、無線通信装置40と、を備える。
通信設計支援装置10は、サイトサーベイ部11と、環境ラベル選択部12と、データ加工部13と、電波強度推定部14と、伝搬モデル記憶部15と、を備える。
(2)X0>X、HBS>Hのとき、低密度・低クラッタモデル
(3)X0<X、HBS<Hのとき、高密度・高クラッタモデル
(4)X0<X、HBS>Hのとき、高密度・低クラッタモデル
本実施形態に係る通信設計支援装置10は、例えば、コンピュータに、本実施形態で説明する処理内容を記述したプログラムを実行させることにより実現することができる。
実施例1では、現地サーベイ業務の自動化を目的とし、現地の担当者が、現地を移動しながら、スマートフォン等のタブレット端末を用いて写真撮影、Lidar取得および測定用の無線規格の電波強度を測定する。通信設計支援装置10は、測定結果から3DCADデータを作成および表示する。
実施例2では、現地担当者が測定用の無線規格の測定結果に基づいて、測定時とは異なる無線規格の伝搬品質を簡易推定し、設備規模等の見積もりに利用する例を示す。
実施例3では、無線設備の運用設計担当者が測定用の無線規格の測定結果に基づいて、測定時とは異なる無線規格の伝搬品質を指定された端末局位置ごとに推定し、無線パラメータを設計する例を示す。
実施例4では、屋内ローカルエリアでの無線規格運用フェーズにおいて、現地担当者または営業/SE担当者が、システム変更要否を未然に判定する例を示す。
実施例5では、屋内ローカルエリアの新設時(工場など)において、新設する無線規格の伝搬品質を推定する例を示す。
実施例6では、屋内ローカルエリアの新設時(工場など)において、レイアウトデータが無く、無線規格の測定が出来ない場合において、無線規格の伝搬品質を推定し、設備規模等の見積もりに利用する例を示す。
本実施形態に係る技術によれば、実施例1から実施例6までのようなさまざまなユーザの利用目的に応じて無線通信の設計を支援することが可能となる。なお、通信設計支援装置10の各機能部(サイトサーベイ部11、環境ラベル選択部12、データ加工部13および電波強度推定部14)は、実施例1から実施例6までの各実施例に示されるように、ユーザの操作に応じて適宜選択された機能を実行する。
本明細書には、少なくとも下記各項の通信設計支援装置、通信設計支援方法およびプログラムが開示されている。
(第1項)
構造物の点群データおよび電波強度の測定データを取得する取得部と、
前記点群データの物体認識の結果に基づいて、前記構造物の形状および材質を示す構造物データを生成する構造物データ生成部と、
前記構造物を含む環境における電波強度の測定データに基づいて、伝搬損失を算出する伝搬損失算出部と、
前記構造物データと前記伝搬損失データとを対応付けたデータを出力する出力部と、を備える、
通信設計支援装置。
(第2項)
構造物データ生成部は、平面検出によって前記構造物の形状および材質を特定する、
第1項に記載の通信設計支援装置。
(第3項)
前記構造物データ生成部は、平面を検出後にドロネー三角形分割により、平面を面素に細分化する、
第2項に記載の通信設計支援装置。
(第4項)
構造物を撮影したデータに基づいて座標データを抽出する抽出部をさらに備え、
前記出力部は、座標データを含む前記構造物データと前記伝搬損失データとを対応付けたデータを出力する、
第1項から第3項のいずれか1項に記載の通信設計支援装置。
(第5項)
コンピュータが実行する通信設計支援方法であって、
構造物の点群データおよび電波強度の測定データを取得するステップと、
前記点群データの物体認識の結果に基づいて、前記構造物の形状および材質を示す構造物データを生成するステップと、
前記構造物を含む環境における電波強度の測定データに基づいて、伝搬損失を算出するステップと、
前記構造物データと前記伝搬損失データとを対応付けたデータを出力するステップと、を備える、
通信設計支援方法。
(第6項)
コンピュータを、第1項から第4項のいずれか1項に記載の通信設計支援装置として機能させるためのプログラム。
10 通信設計支援装置
11 サイトサーベイ部
12 環境ラベル選択部
13 データ加工部
14 電波強度推定部
15 伝搬モデル記憶部
20 撮影装置
30 測距装置
40 無線通信装置
101 レイトレースモデル
102 統計モデル
1000 ドライブ装置
1001 記録媒体
1002 補助記憶装置
1003 メモリ装置
1004 CPU
1005 インタフェース装置
1006 表示装置
1007 入力装置
1008 出力装置
Claims (6)
- 構造物の点群データおよび電波強度の測定データを取得する取得部と、
前記点群データの物体認識の結果に基づいて、前記構造物の形状および材質を示す構造物データを生成する構造物データ生成部と、
前記構造物を含む環境における電波強度の測定データに基づいて、伝搬損失を算出する伝搬損失算出部と、
前記構造物データと前記伝搬損失を示すデータとを対応付けたデータを出力する出力部と、を備える、
通信設計支援装置。 - 構造物データ生成部は、平面検出によって前記構造物の形状および材質を特定する、
請求項1に記載の通信設計支援装置。 - 前記構造物データ生成部は、平面を検出後にドロネー三角形分割により、平面を面素に細分化する、
請求項2に記載の通信設計支援装置。 - 構造物を撮影したデータに基づいて座標データを抽出する抽出部をさらに備え、
前記出力部は、座標データを含む前記構造物データと前記伝搬損失を示すデータとを対応付けたデータを出力する、
請求項1から3のいずれか1項に記載の通信設計支援装置。 - コンピュータが実行する通信設計支援方法であって、
構造物の点群データおよび電波強度の測定データを取得するステップと、
前記点群データの物体認識の結果に基づいて、前記構造物の形状および材質を示す構造物データを生成するステップと、
前記構造物を含む環境における電波強度の測定データに基づいて、伝搬損失を算出するステップと、
前記構造物データと前記伝搬損失を示すデータとを対応付けたデータを出力するステップと、を備える、
通信設計支援方法。 - コンピュータを、請求項1から4のいずれか1項に記載の通信設計支援装置として機能させるためのプログラム。
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