Radio wave visualization system, three-dimensional model creation device, radio wave visualization method and program

Abstract

An electromagnetic wave visualization system according to an embodiment of the present invention includes: a model creation unit that creates a 3D scale model of an environment containing the landforms and buildings of a region serving as the subject of evaluation with respect to the propagation characteristics of electromagnetic waves used in a wireless communication system in which a base station and a terminal station communicate wirelessly via a reconfigurable intelligence surface (RIS) reflection plate; an evaluation condition creation unit that, on the basis of the capability of the wireless communication system, creates a plurality of evaluation conditions used to evaluate the subject region with respect to the propagation characteristics of the electromagnetic waves; and an RIS simulation unit that, on the basis of each of the plurality of evaluation conditions created by the evaluation condition creation unit, simulates the reflection characteristics of the RIS reflection plate and adds such simulation to the 3D scale model created by the model creation unit.

Description

[Technical Field]

[0001] The present invention relates to a radio wave visualization system, a three-dimensional model creation device, a radio wave visualization method, and a program. [Background technology]

[0002] In recent years, the introduction of new wireless communication systems, such as 5G (5th Generation Mobile Communication System) and local 5G, has progressed explosively. When installing these wireless communication systems, evaluation using radio wave propagation simulation is essential. In addition, in order to efficiently evaluate radio wave propagation, technologies are being investigated that visualize the results of radio wave propagation simulation and optimize the settings of wireless communication systems.

[0003] For example, when visualizing the propagation of radio waves, a three-dimensional environmental model is created for the environment in which the wireless communication system is installed, and a propagation simulation is performed by setting the basic performance of the wireless communication system (center frequency, frequency band, transmission power, antenna conditions, installation position) and the evaluation conditions required for the propagation simulation (number of reflections, number of diffractions, transmission / reflection conditions, etc.) (see, for example, Non-Patent Document 1).

[0004] It is desirable to perform radio wave propagation simulation and visualization before installing a wireless communication system. When installing a wireless communication system in an actual environment, the environment may change and the requirements may differ for each communication area, so a system that can evaluate radio wave propagation characteristics in real time is required.

[0005] In addition, research and development has been progressing in recent years on devices called RIS (Reconfigurable intelligence surface) that can change the reflection direction and gain of radio waves propagating, and expectations are growing for the evaluation of communication areas that include this RIS. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] Tetsuro Imai, "Mobile Radio Propagation Simulation Based on Ray-Tracing Method", IEICE, 2009, IEICE Transactions B Vol. J92-B No. 9, pp.1333-1347 Summary of the Invention [Problem to be solved by the invention]

[0007] However, to visualize radio wave propagation in real time, it is necessary to perform each step of the propagation simulation in real time. In particular, it is known that calculations in propagation simulations become a bottleneck. Furthermore, when performing radio wave propagation simulations by strictly inputting the characteristics of RIS, more evaluation conditions are required, which increases the calculation load of the propagation simulation.

[0008] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a radio wave visualization system, a three-dimensional model creation device, a radio wave visualization method, and a program that can easily visualize the propagation characteristics of radio waves in a wireless communication system that conducts wireless communication via a RIS reflector without using a RIS reflector. [Means for solving the problem]

[0009] The radio wave visualization system according to one embodiment of the present invention is a system for visualizing a three-dimensional scale model of an environment including topography and buildings in an area to be evaluated for the propagation characteristics of radio waves used in a wireless communication system in which a base station and a terminal station communicate wirelessly via a RIS reflector. , using the specified materialsthe RIS reflector is simulated and added to the three-dimensional scale model created by the model creation unit, based on each of the plurality of evaluation conditions created by the evaluation condition creation unit; a propagation simulator that performs simulations of a plurality of propagation characteristics using each of the plurality of evaluation conditions created by the evaluation condition creation unit for the three-dimensional scale model in which the RIS simulation unit simulates the reflection characteristics of the RIS reflector, and outputs each of the simulation results; and a visualization unit that sequentially visualizes each of the simulation results of the plurality of propagation characteristics output by the propagation simulator.

[0010] Furthermore, the three-dimensional model creation device according to one embodiment of the present invention creates a three-dimensional scale model of an environment including topography and buildings in an area to be evaluated for the propagation characteristics of radio waves used in a wireless communication system in which a base station and a terminal station communicate wirelessly via a RIS reflector. , using the specified materials The radio wave propagation characteristics evaluation system is characterized by having a model creation unit that creates a model based on the performance of the wireless communication system, an evaluation condition creation unit that creates a plurality of evaluation conditions to be used for evaluating the propagation characteristics of radio waves for the area, and a RIS simulation unit that simulates and adds the reflection characteristics of the RIS reflector to the three-dimensional scale model created by the model creation unit based on each of the plurality of evaluation conditions created by the evaluation condition creation unit.

[0011] Furthermore, a radio wave visualization method according to one embodiment of the present invention is a method for visualizing a radio wave by generating a three-dimensional scale model of an environment including topography and buildings in an area to be evaluated for propagation characteristics of radio waves used in a wireless communication system in which a base station and a terminal station communicate wirelessly via a RIS reflector. , using the specified materialsan evaluation condition creation step of creating a plurality of evaluation conditions to be used for evaluating the propagation characteristics of radio waves for the area based on the performance of the wireless communication system; a RIS simulation step of adding a simulation of the reflection characteristics of the RIS reflector to the three-dimensional scale model created by the model creation step based on each of the plurality of evaluation conditions created by the evaluation condition creation step; a propagation simulation step of simulating a plurality of propagation characteristics using each of the plurality of evaluation conditions created by the evaluation condition creation step for the three-dimensional scale model in which the reflection characteristics of the RIS reflector has been simulated by the RIS simulation step, and outputting each of the simulation results; and a visualization step of sequentially visualizing each of the simulation results of the plurality of propagation characteristics output by the propagation simulation step. The present invention is characterized by comprising: [Effects of the Invention]

[0012] According to the present invention, it is possible to easily visualize the propagation characteristics of radio waves in a wireless communication system that performs wireless communication via a RIS reflector, even without using a RIS reflector. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a diagram illustrating a schematic configuration of a radio wave visualization system according to an embodiment; [Figure 2] FIG. 1 is a diagram illustrating an example of a radio wave visualization method in which the radio wave visualization system visualizes radio waves. [Figure 3] FIG. 2 is a diagram illustrating an example of a hardware configuration of a three-dimensional model creation device. DETAILED DESCRIPTION OF THE INVENTION

[0014] A radio wave visualization system according to an embodiment will be described below with reference to the drawings: Fig. 1 is a diagram illustrating a schematic configuration of a radio wave visualization system 1 according to an embodiment.

[0015] 1, the radio wave visualization system 1 includes, for example, a three-dimensional model creation device 2, a propagation simulator 3, and a visualization unit 4. The radio wave visualization system 1 simulates and visualizes radio wave propagation in an environment including the topography and buildings of an area (target area) where a wireless communication system is planned to be installed, in which, for example, one or more base stations and one or more terminal stations perform wireless communication.

[0016] The environment of the target area includes reflectors or relay stations that reflect or relay radio waves emitted by the base station or terminal station.

[0017] The three-dimensional model creating device 2 includes a model creating unit 20, an evaluation condition creating unit 22, and a RIS simulating unit .

[0018] The model creation unit 20 acquires environmental information indicating the environment of the target area and creates a scale model for reproducing the environment of the target area. For example, the model creation unit 20 creates a reduced three-dimensional scale model from a predetermined material using, for example, a 3D (three-dimensional) printer, which reproduces the environment including the topography and buildings of the area to be evaluated for the propagation characteristics of radio waves used in a wireless communication system in which a base station and a terminal station communicate wirelessly via a RIS reflector.

[0019] The evaluation condition creating unit 22 creates a plurality of evaluation conditions used to evaluate the propagation characteristics of radio waves for a target area based on wireless communication system information indicating the performance of the wireless communication system, and outputs them to the RIS simulator 24 and the propagation simulator 3.

[0020] For example, the evaluation condition creating unit 22 creates evaluation conditions that reflect the reflection characteristics of an actual RIS reflector that reflects radio waves incident at a predetermined incident angle, such as the dynamically controlled reflection direction of the RIS reflector, the action of the RIS reflector to concentrate radio waves at a specific point, and the scattering of radio waves by the RIS reflector.

[0021] The RIS simulation unit 24 simulates and adds the reflection characteristics of the RIS reflector to the three-dimensional scale model created by the model creation unit 20 based on each of the multiple evaluation conditions created by the evaluation condition creation unit 22.

[0022] For example, the RIS simulation unit 24 adjustably simulates and adds the reflection characteristics (reflection direction, gain, beam width) of an actual RIS reflector by varying at least one of the number, size, dielectric constant, and shape of the reflectors that simulate the actual RIS reflector.

[0023] The propagation simulator 3 performs simulations of multiple propagation characteristics using multiple evaluation conditions created by the evaluation condition creation unit 22 on a three-dimensional scale model in which the RIS simulation unit 24 simulates the reflection characteristics of a RIS reflector, and outputs the simulation results to the visualization unit 4.

[0024] The visualization unit 4 is, for example, a display (display device) and sequentially visualizes the simulation results of the multiple propagation characteristics output by the propagation simulator 3. The visualization unit 4 may also be configured to visualize only the direct wave.

[0025] Next, a description will be given of an example of a radio wave visualization method in which the radio wave visualization system 1 visualizes radio waves. Fig. 2 is a diagram showing an example of a radio wave visualization method in which the radio wave visualization system 1 visualizes radio waves.

[0026] 2, in order to visualize radio waves, the model creation unit 20 first creates a three-dimensional scale model (S100) in the radio wave visualization system 1. Next, the radio wave visualization system 1 sets the evaluation conditions created by the evaluation condition creation unit 22 in the RIS simulation unit 24 and the propagation simulator 3 (S102).

[0027] Next, the RIS simulation unit 24 simulates and adds the reflection characteristics of the RIS reflector to the three-dimensional scale model created by the model creation unit 20 based on each of the multiple evaluation conditions created by the evaluation condition creation unit 22 (RIS simulation) (S104).

[0028] The propagation simulator 3 performs simulations of multiple propagation characteristics using multiple evaluation conditions created by the evaluation condition creation unit 22 on the three-dimensional scale model to which the RIS simulation unit 24 has added the simulating reflection characteristics of the RIS reflector, and outputs the simulation results to the visualization unit 4 (S106).

[0029] Then, the visualization unit 4 sequentially visualizes each of the simulation results of the propagation characteristics output by the propagation simulator 3 (S108).

[0030] If it becomes necessary to change the evaluation conditions due to a change in the target environment or the like, the radio wave visualization system 1 returns to the process of S102, and if it becomes necessary to create a three-dimensional scale model again, it returns to the process of S100.

[0031] In this way, the radio wave visualization system 1 makes it possible to easily visualize the radio wave propagation characteristics of a wireless communication system that communicates wirelessly via a RIS reflector without using a RIS reflector, by having the RIS simulation unit 24 simulate and add the reflection characteristics of a RIS reflector to the three-dimensional scale model created by the model creation unit 20 based on each of the multiple evaluation conditions created by the evaluation condition creation unit 22.

[0032] In addition, each part of the radio wave visualization system 1 may be configured in part or in whole by hardware such as a PLD (Programmable Logic Device) or an FPGA (Field Programmable Gate Array), or may be configured as a program executed by a processor such as a CPU.

[0033] For example, each component of the radio wave visualization system 1 can be realized using a computer and a program, and the program can be recorded on a storage medium or provided via a network.

[0034] Fig. 3 is a diagram showing an example of the hardware configuration of the three-dimensional model creation device 2. As shown in Fig. 3, for example, the three-dimensional model creation device 2 has an input unit 90, an output unit 91, a communication unit 92, a CPU 93, a memory 94, and an HDD 95 connected via a bus 96, and is equipped with the functions of a computer. In addition, the three-dimensional model creation device 2 is configured to be able to input and output data to and from a computer-readable storage medium 97.

[0035] The input unit 90 is, for example, a keyboard and a mouse, etc. The output unit 91 is, for example, a display device such as a display, etc. The communication unit 92 is, for example, a network interface, etc.

[0036] The CPU 93 controls each component constituting the three-dimensional model creating device 2 and performs predetermined processing, etc. The memory 94 and HDD 95 are storage units that store data, etc.

[0037] The storage medium 97 is capable of storing programs and the like that cause the three-dimensional model creation device 2 to execute the functions of the three-dimensional model creation device 2. Note that the architecture that configures the three-dimensional model creation device 2 is not limited to the example shown in FIG. [Explanation of symbols]

[0038] 1···Radio wave visualization system, 2···Three-dimensional model creation device, 3···Propagation simulator, 4···Visualization unit, 20···Model creation unit, 22···Evaluation condition creation unit, 24···RIS simulation unit, 90···Input unit, 91···Output unit, 92···Communication unit, 93···CPU, 94···Memory, 95···HDD, 96···Bus, 97···Storage medium

Claims

1. a model creation unit that creates, using a predetermined material, a three-dimensional scale model of an environment including topography and buildings in an area to be evaluated for propagation characteristics of radio waves used in a wireless communication system in which a base station and a terminal station communicate wirelessly via a RIS reflector; an evaluation condition creating unit that creates a plurality of evaluation conditions used to evaluate radio wave propagation characteristics for the area based on performance of the wireless communication system; a RIS simulation unit that simulates and adds reflection characteristics of the RIS reflector to the three-dimensional scale model created by the model creation unit based on each of a plurality of evaluation conditions created by the evaluation condition creation unit; a propagation simulator that executes a plurality of propagation characteristic simulations using a plurality of evaluation conditions created by the evaluation condition creation unit on a three-dimensional scale model in which the RIS simulation unit simulates the reflection characteristics of the RIS reflector, and outputs the simulation results; a visualization unit that sequentially visualizes the simulation results of the plurality of propagation characteristics output by the propagation simulator; A radio wave visualization system comprising:

2. The RIS simulation unit By varying at least one of the number, size, dielectric constant, and shape of the reflectors that simulate the RIS reflectors, the reflection characteristics of the RIS reflectors are simulated and added. The radio wave visualization system according to claim 1 ,

3. a model creation unit that creates, using a predetermined material, a three-dimensional scale model of an environment including topography and buildings in an area to be evaluated for propagation characteristics of radio waves used in a wireless communication system in which a base station and a terminal station communicate wirelessly via a RIS reflector; an evaluation condition creating unit that creates a plurality of evaluation conditions used to evaluate radio wave propagation characteristics for the area based on performance of the wireless communication system; a RIS simulation unit that simulates and adds reflection characteristics of the RIS reflector to the three-dimensional scale model created by the model creation unit based on each of a plurality of evaluation conditions created by the evaluation condition creation unit; A three-dimensional model creation device comprising:

4. The RIS simulation unit By varying at least one of the number, size, dielectric constant, and shape of the reflectors that simulate the RIS reflectors, the reflection characteristics of the RIS reflectors are simulated and added.

4. The three-dimensional model creating device according to claim 3, wherein:

5. a model creation process for creating, using a predetermined material, a three-dimensional scale model of an environment including topography and buildings in an area to be evaluated for the propagation characteristics of radio waves used in a wireless communication system in which a base station and a terminal station communicate wirelessly via a RIS reflector; an evaluation condition creating step of creating a plurality of evaluation conditions to be used for evaluating radio wave propagation characteristics for the area based on the performance of the wireless communication system; a RIS simulation step of simulating and adding reflection characteristics of the RIS reflector to the three-dimensional scale model created in the model creation step based on each of the plurality of evaluation conditions created in the evaluation condition creation step; a propagation simulation step of executing a plurality of propagation characteristic simulations using the plurality of evaluation conditions created in the evaluation condition creation step on a three-dimensional scale model in which the reflection characteristics of the RIS reflector have been simulated in the RIS simulation step, and outputting the simulation results; a visualization step of sequentially visualizing the simulation results of the plurality of propagation characteristics outputted by the propagation simulation step; A radio wave visualization method comprising:

6. In the RIS simulation process, By changing at least one of the number, size, dielectric constant, and shape of the reflectors that simulate the RIS reflectors, the reflection characteristics of the RIS reflectors are simulated and added. The radio wave visualization method according to claim 5,

7. 5. A program for causing a computer to function so that each unit of the three-dimensional model creation device according to claim 3 or 4 functions.

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