WO2021020411A1

WO2021020411A1 - Measurement system, measurement method, and program

Info

Publication number: WO2021020411A1
Application number: PCT/JP2020/028959
Authority: WO
Inventors: 哲郎北山
Original assignee: 日鉄ソリューションズ株式会社
Priority date: 2019-07-29
Filing date: 2020-07-29
Publication date: 2021-02-04

Abstract

A measurement unit mounted on a mobile body capable of moving in a height direction along an outer surface of a building performs at least one of a radiowave intensity measurement and a communication test. Height information relating to the height at which the measurement unit is positioned is acquired by a position acquiring unit. A measurement result obtained by the measurement unit is stored in association with the height information acquired when the measurement result was obtained, whereby the radiowave condition in the building can be measured easily.

Description

Measurement system, measurement method, and program

The present invention relates to a measurement system, a measurement method, and a program.

In mobile communication using mobile terminals such as mobile phones, the radio wave condition between the base station and the mobile terminal is affected in various ways. For example, if a mountain or a high-rise building exists between a base station and a mobile terminal, the radio wave may be bypassed or reflected, which has a great influence on the radio wave condition. In high-rise buildings such as buildings and condominiums, in general, the upper floors, which have few obstacles around them, have stronger radio wave strength than the lower floors, and can receive radio waves from many base stations. This causes a problem that the reception sensitivity of radio waves differs. As a solution to such a problem, equipment such as an indoor antenna and a repeater is installed in the building in order to improve the radio wave condition. In addition, even on higher floors, if the radio waves from multiple base stations are similarly strong, the radio waves used may be frequently switched and communication may be interrupted during communication by the mobile terminal. is there.

Japanese Unexamined Patent Publication No. 2003-204296

When improving the radio wave condition in a building to solve the above-mentioned problems, the radio wave intensity on each floor is measured in advance. However, the number of floors increases due to the heightening of the building, and it takes a lot of time and effort to bring the necessary equipment to each floor and measure the radio wave condition such as the radio wave strength. In addition, in buildings such as condominiums that have privately owned areas, even if an attempt is made to measure the radio wave condition on each floor, it is often difficult to enter and measure for reasons such as privacy.

The present invention has been made in view of such circumstances, and an object of the present invention is to make it possible to easily measure the radio wave condition in a building.

The measurement system according to the present invention includes a moving body that can move in the height direction along the outer surface of the building, a measuring unit that is mounted on the moving body and performs at least one of radio wave intensity measurement and communication test, and the measurement. The position acquisition unit that acquires height information related to the height at which the unit is located and the measurement result obtained by the measurement unit are the height information acquired by the position acquisition unit when the measurement result is obtained. It is characterized by having a storage unit for storing in association with.

According to the present invention, it is possible to easily measure the radio wave condition in a building.

FIG. 1 is a diagram showing a configuration example of a measurement system according to the present embodiment. FIG. 2 is a diagram showing an example of the hardware configuration of the measuring device 110. FIG. 3A is a diagram for explaining the measurement of the radio wave condition in the measurement system according to the present embodiment. FIG. 3B is a diagram for explaining the measurement of the radio wave condition in the measurement system according to the present embodiment. FIG. 4A is a diagram illustrating an example using the measurement system according to the present embodiment. FIG. 4B is a diagram illustrating an example using the measurement system according to the present embodiment. FIG. 4C is a diagram illustrating an example using the measurement system in the present embodiment. FIG. 5 is a diagram illustrating an example using the measurement system in the present embodiment. FIG. 6 is a diagram for explaining the measurement results in the present embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration example of a measurement system according to an embodiment of the present invention. In FIG. 1, 110 is a measuring device for measuring a radio wave condition, 120 is a mobile body on which the measuring device 110 is mounted, and 130 is an operation terminal. The measuring device 110 includes a position acquisition unit 111, a measuring unit 112, a storage unit 113, a communication unit 114, and a control unit 115.

The position acquisition unit 111 specifies the position of the measurement unit 112 and acquires the position information. The position acquisition unit 111 acquires height information by specifying at least the height at which the measurement unit 112 is located, but in addition to the height information, the position acquisition unit 111 specifies the horizontal position of the measurement unit 112 in the horizontal direction as necessary. The position information related to the above may also be acquired. Here, the height information may be information indicating the height itself such as altitude and ground clearance, or information indicating the number of floors in the building, as long as the position of the measuring unit 112 is clearly known. .. The position acquisition unit 111 can specify (measure) the altitude, such as an altitude sensor, GPS, or barometer, or equip each floor of the building with a beacon or the like to specify the hierarchy by receiving a transmission signal from the beacon. You may. Further, the position information in the horizontal direction may be positioning information obtained by GPS or the like, or may be position information relative to a predetermined reference point. The position acquisition unit 111 may specify the position of the measurement unit 112 itself to acquire the position information, or may specify the position of the moving body 120 on which the measuring device 110 is mounted and based on the position of the moving body 120. The position information related to the measurement unit 112 may be acquired.

The measurement unit 112 measures the radio wave condition in communication with the base station. The measurement unit 112 measures the radio wave (electric field) strength of the radio wave from the base station and performs a communication test related to communication via the base station. Here, the communication test is, for example, a test for evaluating the temporal continuity of communication and data communication related to a voice call via a base station, and an evaluation for connectivity when continuously making and receiving calls. Tests to be done. Further, when measuring the radio wave condition, the measurement unit 112 acquires information (ID information or the like) for identifying the base station that transmitted the radio wave, and outputs the measurement result of the radio wave condition including the information for identifying the base station.

The storage unit 113 stores the measurement result of the radio wave condition obtained by the measurement unit 112. The storage unit 113 stores the measurement result of the radio wave condition in association with the position information acquired by the position acquisition unit 111 and the information for identifying the base station when the measurement result of the radio wave condition is obtained. For example, when the measuring unit 112 receives radio waves from a plurality of base stations and obtains radio wave condition measurement results for a plurality of base stations, the radio wave condition measurement results for each of the plurality of base stations with respect to the position information. Is associated and stored in the storage unit 113. The measurement result of the radio wave condition to be stored is stored together with the time information at the time of measurement.

The communication unit 114 communicates with an external device such as the operation terminal 130. The communication unit 114 receives, for example, an operation instruction to the measuring device 110 from the operation terminal 130 or the like, or transmits data or the like stored in the storage unit 113 to the operation terminal 130 or the like. The communication unit 114 may be wirelessly connected to an external device such as the operation terminal 130 for communication, or may be wiredly connected to an external device such as the operation terminal 130 for communication. Good. The control unit 115 controls each of the functional units 111 to 114 of the measuring device 110. For example, the control unit 115 instructs the measurement unit 112 to execute a process of measuring the radio wave condition.

The moving body 120 is equipped with a measuring device 110 and can move along the outer surface (outer surface, outer wall) 101 of the building. The moving body 120 is, for example, a drone or a gondola that can move to the wall surface 101. The moving body 120 can move at least in the height direction (vertical direction) in the building, and may further move in the horizontal direction (horizontal direction) in the building.

The operation terminal 130 is a terminal that gives an operation instruction or the like to the measuring device 110. Further, the operation terminal 130 can receive the measurement result of the radio wave condition from the measuring device 110 and hold or display the measurement result of the radio wave condition. The operation terminal 130 is not limited to the operation instruction to the measuring device 110, and may be able to give a movement control instruction to the moving body 120.

FIG. 2 is a diagram showing an example of the hardware configuration of the measuring device 110. The measuring device 110 includes a CPU 201, a ROM 202, a RAM 203, a storage device 204, a position detecting device 205, a communication device 206, a communication interface (IF) 207, and an input / output interface (IF) 208. The CPU 201, ROM 202, RAM 203, storage device 204, position detection device 205, communication device 206, communication IF 207, and input / output IF 208 are connected to each other so as to be able to communicate with each other.

The CPU 201 comprehensively controls each component of the measuring device by executing a program stored in the ROM 202 or the storage device 204. For example, the CPU 201 controls various processes in the measuring device 110 by reading and executing a processing program from the ROM 202 or the storage device 204. The RAM 203 functions as a main memory, a work area, or the like of the CPU 201. The storage device 204 is a storage device such as a hard disk drive (HDD) or a solid state drive (SSD), and stores data or the like obtained by measuring a program or a radio wave condition. The program executed by the CPU 201 may be provided by a computer-readable non-transitory storage medium.

The position detection device 205 detects the position of the measurement device 110 and outputs the position information. The position detection device 205 is, for example, a GPS unit or a position detection sensor such as an altitude sensor or a direction sensor. When the moving body 120 is supported by a wire or the like like a gondola, the position detecting device 205 can obtain information in the height direction and the horizontal direction from instruction data to the device that controls the wire or the like. You may. As described above, the building can be appropriately provided with a beacon or the like, and the hierarchy can be specified by identifying the signal from the received beacon. The communication device 206 is a communication device that receives radio waves from a base station, communicates via the base station, or receives a beacon signal. The communication device 206 can measure the radio wave strength and perform a communication test. The communication device 206 may be, for example, a dedicated device capable of measuring the radio wave strength and executing a communication test, or a mobile terminal such as a smartphone capable of performing the measurement of the radio wave strength and the communication test by an application, for example. May be good. The communication IF 207 is an interface used for communication with an external device such as an operation terminal 130. The input / output IF208 is an interface used for input / output of data or the like to the measuring device 100.

In the measurement of the radio wave condition using the measurement system in the present embodiment, for example, as shown in FIG. 3A, the moving body 120 equipped with the measuring device 110 is moved in the height direction along the outer surface of the building. .. Then, after moving the moving body 120 to the position of the floor where the radio wave condition is measured, the measurement unit 112 measures the radio wave condition. In FIG. 3A, the moving body 120 equipped with the measuring device 110 moves from the ground floor to the top floor, then horizontally moves to a predetermined position on the top floor, moves from the top floor to the ground floor, and then moves to the ground floor. Then, the movement of horizontally moving to a predetermined position is repeated. Then, the measurement result of the radio wave condition obtained by the measurement is stored in the storage unit 113 in association with the position information including at least the height information acquired by the position acquisition unit 111 at that time. The measurement of the radio wave condition by the measuring unit 112 is sequentially performed on the floor to be measured by moving the moving body 120.

This makes it possible to easily measure the radio wave condition in the height direction of the building in a short time without entering the building or moving inside the building. Furthermore, by analyzing the measured radio wave condition, for example, it is possible to determine the necessity of installing a repeater or the like in the building and specify the installation location, and it is possible to improve the radio wave condition in the building. If the moving body 120 can also move in the horizontal direction in the building, the moving body 120 equipped with the measuring device 110 may be moved according to a movement locus that repeats horizontal movement and vertical movement as shown in FIG. 3B. Needless to say. Further, FIGS. 3A and 3B show an example in which the moving body 120 is moved so as to pass through the window surface, but this is an example. For example, the wall or the pillar is not visible from the room while avoiding the window surface. It may be moved along the position. By avoiding the window surface in this way, it is possible to carry out measurement by a method that further considers privacy.

Hereinafter, an example in which the measurement of the radio wave condition by the measurement system in the present embodiment is applied will be described.
(First example: Measurement of radio field strength)
The moving body 120 equipped with the measuring device 110 is moved in the height direction along the outer surface of the building, and the measuring device 110 measures the radio field intensity on the floor to be measured. The measurement of the radio wave intensity by the measuring unit 112 is performed a plurality of times at a predetermined measurement timing with the moving body 120 stopped at the height of the floor to be measured, and the average value is used as the measured value of the radio wave intensity. Then, the measured value of the measured radio wave intensity is stored in the storage unit 113 in association with the measured position information of the floor. By measuring the radio wave intensity in this way, it is possible to obtain information about the radio wave intensity at each measurement target position of the building as shown in FIG. 4A, for example. From the information shown in FIG. 4A, for example, it can be understood that the radio field strength is weaker on the lower floors than on the upper floors in this building, and it can be used to determine the necessity of installing a repeater or the like. In FIG. 4A, the measured number of floors is shown as height information. For example, "8F" indicates the height of the 8th floor of the building. Further, "horizontal position 01" to "horizontal position 05" indicate, for example, measured values for each horizontal position at the height of the 8th floor (the same applies to FIGS. 4B, 4C, and 5 in both rows and columns). ..

Further, for example, the radio field intensity is similarly measured on each surface of the building at the same time, and the surface different from the surface from which the information shown in FIG. 4A is obtained (for example, the opposite surface) is shown in FIG. 4B. It is assumed that information on the radio field strength at each measurement target position of such a building is obtained. By comparing the information shown in FIG. 4A with the information shown in FIG. 4B, it is possible to grasp, for example, which direction side in the building the radio wave with strong radio wave strength can be received, and to determine the necessity of installing a repeater or the like. It can be used to study the installation location. Comparing FIG. 4A and FIG. 4B, it can be understood that the surface corresponding to FIG. 4A has stronger radio field intensity.

Further, for example, after a long period such as several months has passed, the radio field strength is measured in the same manner, and it is assumed that information on the radio field strength at each measurement target position of the building as shown in FIG. 4C is obtained. By comparing the information shown in FIG. 4A with the information shown in FIG. 4C, it can be understood that the radio field strength has decreased for some reason on the lower floors. Further, for example, it is possible to grasp the stability of the radio wave by comparing the information obtained by similarly measuring the radio wave intensity every time a predetermined period elapses. When the information is tabulated as shown in FIGS. 4A, 4B, and 4C and provided to the user who uses the measurement result of the radio wave condition, if the information is displayed by coloring according to the radio wave strength, the radio wave strength can be measured. It is possible to make it easier to visually recognize differences.

(Second example: Measurement of radio field strength for each base station)
The moving body 120 equipped with the measuring device 110 is moved in the height direction along the outer surface of the building, and the measuring device 110 measures the radio field intensity on the floor to be measured. The measurement of the radio wave intensity by the measuring unit 112 is performed a plurality of times at a predetermined measurement timing with the moving body 120 stopped at the height of the floor to be measured, and the average value is used as the measured value of the radio wave intensity. In this example, the measuring unit 112 of the measuring device 110 receives radio waves from a plurality of base stations and measures the radio wave strength of each base station. Then, the measured value of the radio wave intensity for each of the plurality of measured base stations is associated with the measured floor height information and stored in the storage unit 113. By measuring the radio wave strength in this way, it is possible to obtain information about the radio wave strength of each base station at each height as shown in FIG. 5, and grasp the radio wave condition according to the height and the base station. can do. In addition, in FIG. 5, the measured value of the radio wave intensity for each base station is displayed for the measured value on each floor, but as shown in FIG. 4A and the like, the measured value is further at the same height from the “horizontal position 01”. By measuring the radio wave intensity at a plurality of positions such as "horizontal position 05", it is possible to grasp the radio wave condition for each of the plurality of base stations in more detail.

(Third example: communication test)
The mobile body 120 equipped with the measuring device 110 is moved along the outer surface of the building, and the measuring device 110 performs a communication test related to communication via a base station on the floor to be measured. The communication test by the measuring unit 112 is carried out in a state where the moving body 120 is stopped at the height of the floor to be measured, as in the measurement of the radio wave intensity. Then, the result of the communication test is stored in the storage unit 113 in association with the position information of the floor on which the test was performed. The results of the communication test include information about the evaluation target in each test and the radio field strength of each base station when an event occurs during the test.

Here, for example, in the communication test, a test for evaluating the temporal continuity of the connection in the communication related to the voice call via the base station, and the connectivity when attempting to make and receive a call continuously are performed. There are tests to evaluate. In addition, the communication test includes a test for evaluating the temporal continuity of connection for data communication via a base station, and a test for evaluating connectivity when continuously making and receiving calls. .. Communication tests related to communication related to voice calls are performed using voice calls such as weather forecasts and time signals, and communication tests related to data communication are performed, for example, by browsing a predetermined website.

FIG. 6 is an example of a diagram showing the measurement results of the communication test. In this example, the height direction is the 8th floor of the building, and the result of the test is shown near the 5th window on the west side. For example, a voice call is transmitted 10 times in a row, the success / failure of the transmission is recorded, and the radio wave intensity of each base station that has received the radio wave is also recorded as information. Then, the number of successful transmissions connected to the base station for 10 voice transmissions is calculated as the success rate. The number of continuous transmissions is not limited to 10 times, and may be arbitrarily determined according to the purpose of the test. In the test, not only voice transmission but also incoming call, data communication transmission / reception, number of disconnections in continuous call, number of disconnections in continuous data communication, etc. are selected according to the purpose. By carrying out such a communication test while changing the position, it is possible to obtain information for evaluation of radio wave quality in addition to the radio wave intensity near the outer wall surface of the building.

For example, if a test for making and receiving a call is continuously performed and a call or a call cannot be received, the result of the communication test stored in the storage unit 113 is analyzed to transmit a handover failure or the like. Alternatively, it is possible to identify the reason why the incoming call could not be received.

(Fourth example: Simultaneous measurement with multiple units)
A plurality of mobile bodies 120 equipped with the measuring device 110 are simultaneously moved along the outer surface of the building, and each measuring device 110 associates the measured value of the radio field intensity with the measured time information and the floor position information. It is stored in the storage unit 113. For example, five mobile bodies 120 equipped with the measuring device 110 are arranged at the same height in the horizontal direction at different positions, and the five mobile bodies 120 are simultaneously moved from the first floor to the eighth floor in parallel to generate radio waves. Measure the strength.

This makes it possible to grasp the status of radio field strength at the same height at the same time. For example, if the result of measuring the radio wave intensity is the information shown in FIG. 4A, the distribution of the radio wave intensity at the same timing can be grasped on each floor. Similarly, a plurality of mobile bodies 120 equipped with the measuring device 110 are arranged at different positions in the height direction at the same time, and moved in parallel in the horizontal direction to measure the radio wave intensity at the same time. The distribution of radio field intensity in the height direction can be grasped. In any case, it goes without saying that it can be applied not only to radio wave strength but also to measurement of communication test (evaluation of radio wave quality).

It should be noted that the above-described embodiments are merely examples of embodiment of the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. That is, the present invention can be implemented in various forms without departing from the technical idea or its main features.
For example, in each of the above-described embodiments, a cubic building has been described as an example, but in the case of a cylindrical building, a certain height may be orbited in the horizontal direction for measurement / testing. In this case, the directional information detected by the directional sensor of the position detecting device 205 is stored in the horizontal positions 01 to 05 shown in FIGS. 4A, 4B, 4C and the like. Alternatively, it may move in a spiral and store the measured value together with the height information and the orientation information.

Claims

A moving body that can move in the height direction along the outer surface of the building,
A measuring unit mounted on the moving body and performing at least one of radio field strength measurement and communication test,
A position acquisition unit that acquires height information related to the height at which the measurement unit is located, and a position acquisition unit.
A measurement system characterized by having a storage unit that stores the measurement result obtained by the measurement unit in association with the height information acquired by the position acquisition unit when the measurement result is obtained.
The measuring unit measures at least the radio wave intensity, and then
The measurement system according to claim 1, wherein the storage unit stores a measured value of radio wave intensity obtained by the measurement unit in association with information for identifying a base station that has transmitted radio waves.
When the measuring unit receives radio waves from a plurality of base stations at a first height, the storage unit is characterized in that the height information is stored in association with the radio wave strength of each of the plurality of base stations. 2. The measurement system according to claim 2.
The measuring unit performs at least the communication test and performs the communication test.
The measurement system according to any one of claims 1 to 3, wherein the communication test includes a test for evaluating the continuity of a connection related to communication via a base station.
The measuring unit performs at least the communication test and performs the communication test.
The measurement system according to any one of claims 1 to 4, wherein the communication test includes a test for evaluating connectivity related to transmission and reception in communication via a base station.
The measurement system according to claim 4 or 5, wherein the storage unit stores the radio wave intensity of each base station together with the result of the communication test.
The moving body can further move horizontally along the outer surface of the building.
The position acquisition unit further acquires position information in the horizontal direction in which the measurement unit is located, and obtains position information.
The storage unit stores the measurement result obtained by the measurement unit in association with the height information acquired by the position acquisition unit when the measurement result is obtained and the position information related to the horizontal direction. The measurement system according to any one of claims 1 to 6, characterized in that.
The measurement system according to any one of claims 1 to 7, wherein the measurement result stored in the storage unit in association with the height information is provided in a display format combined with the height information.
A claim characterized in that a plurality of the moving bodies are simultaneously moved along the outer surface of the building, and the measurement results obtained by the respective measuring units mounted on the moving bodies are stored in association with the time information at the time of measurement. Item 6. The measurement system according to any one of Items 1 to 8.
The moving process of moving the moving body in the height direction along the outer surface of the building,
A measurement process in which the measuring unit mounted on the moving body performs at least one of measurement of radio wave strength and communication test, and
A position acquisition process for acquiring height information related to the height at which the measuring unit is located, and
A measurement method comprising a storage step of associating a measurement result obtained in the measurement step with the height information acquired when the measurement result is obtained and storing the measurement result in a storage unit.
A measurement step in which a moving body that can move in the height direction along the outer surface of the building is sequentially moved, and a measuring unit mounted on the moving body performs at least one of radio wave intensity measurement and communication test.
A position acquisition step for acquiring height information related to the height at which the measuring unit is located, and
A program for causing a computer to execute a storage step in which a measurement result obtained in the measurement step is associated with the height information acquired when the measurement result is obtained and stored in a storage unit.