KR20110048305A - Apparatus for measuring indoor wave environment and method for measuring indoor wave environment using the same - Google Patents

Abstract

PURPOSE: A device and method for measuring an indoor wave environment are provided to conveniently determine a measurement location in the indoor where it is difficult to find a location due to a building obstacle. CONSTITUTION: An indoor wave environment measuring device comprises a wave generating device(100), a wave measuring device(200), measurement location reference devices(300,301,302,303,304). The wave generating device is placed in one room and generates a wave. The wave measuring device measures the strength of a received wave by receiving a wave from the wave generating device and measures a counter coordinate value based on a corresponding reference point. The measurement location reference devices are placed in the remaining rooms except one room and play a role as reference points to determine the counter coordinate of the wave measuring device.

Description

Indoor radio wave measuring apparatus and its method {APPARATUS FOR MEASURING INDOOR WAVE ENVIRONMENT AND METHOD FOR MEASURING INDOOR WAVE ENVIRONMENT USING THE SAME}

The present invention relates to an apparatus for measuring radio wave environment, unlike an outdoor environment in which a location of a place to be measured through GPS can be easily determined, in a room where a measurement position cannot be easily determined due to a communication obstacle such as a wall or a ceiling, the measurement location The present invention relates to a device and a method for determining and measuring radio waves.

The present invention is derived from the research conducted as part of the IT growth engine technology development project of the Ministry of Knowledge Economy [Task Management No .: 2008-S-023-02, Task name: Development of sensor network simulator based on NanoQplus].

The radio wave environment means a space in which radio waves are transmitted. In indoor spaces such as buildings, many obstacles to radio wave transmission, such as walls, ceilings, and furniture, exist in a narrow area. Communication obstacles that impede the transmission of radio waves cause reflections, diffraction, refraction and scattering of the radio waves during radio transmission. This has a significant impact on the performance of the network system. In particular, in the case of a system having a shorter radio wave transmission range than other network systems such as a sensor network system, since the radio wave transmission intensity varies depending on the measurement position in the same area such as a room, it is very difficult to measure the indoor radio wave environment. It is important.

The result of propagation environment measurement is propagation environment information such as propagation intensity and signal-to-noise ratio according to location information. The radio wave environment measurement method may be classified into outdoor and indoor according to a location information collection method. Outdoor measurement uses GPS information to automatically determine the location, and measure the radio wave intensity as a vehicle equipped with a measurement device or a measurer having a measurement terminal moves. In the case of indoors, there is no way to automatically extract the exact absolute position like GPS, so it is common for a measurer to predetermine the points to be measured and then measure the radio wave environment by visiting the predetermined measuring points with the measuring terminal. to be. In this case, in order to determine whether the measurer has reached the measuring point correctly, a recognition device such as a mark or RFID that can determine the position may be used. When a plurality of measuring points exist, these recognition devices must be installed at each measuring point. Very uncomfortable In addition, there is a disadvantage that it is difficult to make radio wave measurement at a point other than a predetermined measurement position. In addition, there are infrared, ultrasonic, and RF-based indoor location recognition devices, which are not suitable when the reach is too short to measure a large space, or when the reach is long and the accuracy is low and requires careful measurement.

Therefore, there is a need for a device that enables radio measurement regardless of location in an indoor environment.

Accordingly, it is an object of the present invention to provide a device for conveniently determining a measurement position and measuring a radio wave in a room where a location cannot be easily determined due to a building element such as a wall or a ceiling.

Another object of the present invention to provide a method for measuring the indoor radio wave environment using the device.

An indoor radio wave environment measuring apparatus according to an aspect of the present invention for achieving the above object is provided in any one of a plurality of rooms in the room, the radio wave generating device for generating radio waves, and by the radio wave generating device A radio wave measuring device that receives the generated radio wave, measures the intensity of the received radio wave, measures its relative coordinate value based on the reference reference point among a plurality of reference origins, and converts the measured relative coordinate value into an absolute coordinate value. And a plurality of measurement position reference devices provided in all the rooms except the one room and serving as the plurality of reference origins to determine the relative coordinates of the radio wave measuring device.

According to another aspect of the present invention, there is provided a method for measuring an indoor radio wave environment, in which a radio wave generating device for generating radio waves is installed in any one of a plurality of rooms in a room, and the radio wave measuring device is radio waves generated by the radio wave generating device. Measuring the intensity of the received radio wave and measuring its relative coordinate value based on the reference reference point among a plurality of reference origins, and the radio wave measuring apparatus uses the measured relative coordinate value as an absolute coordinate value. And a plurality of measurement position reference devices that serve as the plurality of reference origins to determine the relative coordinates of the radio wave measurement device and to determine the relative coordinates of the radio wave measurement device. Each step is installed in.

The present invention can compensate for the shortcomings of the conventional indoor radio environment measurement method, which was only possible to measure at a predetermined position. That is, according to the present invention, since indoor location information can be calculated at an arbitrary location, the radio wave environment can be measured at any location without being limited to the indoor location, and thus, a detailed radio wave environment analysis can be performed through data collection at various locations. It is possible.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings. In understanding each of the figures, it should be noted that like parts are denoted by the same reference numerals whenever possible. Incidentally, detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a view for explaining a method for measuring indoor radio wave environment according to an embodiment of the present invention.

Referring to FIG. 1, in the indoor radio wave environment measuring method according to an exemplary embodiment of the present invention, a radio wave transmitting apparatus 100, a radio wave measuring apparatus 200, and a measurement position reference apparatus 300 are basically required.

The apparatus 100 for transmitting radio waves is a device for generating radio waves to be measured, and the apparatus for measuring radio waves 200 is an apparatus for receiving radio waves generated from the apparatus 100 for transmitting radio waves and measuring the intensity of the received radio waves. For example, in the case of a mobile phone system, the base station corresponds to the radio wave transmitting apparatus 100, and corresponds to the radio wave measuring apparatus 200 for checking whether the mobile phone receives the radio wave generated from the base station. In the sensor network system, a sensor node transmitting data and a sensor node receiving data may be viewed as a radio wave generating device 100 and a radio wave measuring device, respectively.

The radio wave measuring apparatus 200 referred to in an embodiment of the present invention has an indoor location recognition function in addition to the radio wave reception function. Here, the indoor position means a relative position with respect to a specific point.

In the case of indoors, it is difficult to obtain the absolute coordinates immediately, unlike in the case of the outdoor where the absolute position can be immediately determined using a method such as GPS.

Therefore, in one embodiment of the present invention, relative coordinates of relative positions are measured based on the specific point, and absolute coordinates are calculated using the measured relative coordinates.

The measurement position reference apparatus 300 according to an embodiment of the present invention corresponds to a reference origin for determining a relative position of the radio wave measurement apparatus 200.

The relative position between the radio wave measuring device 200 and the measurement position reference device 300 according to an embodiment of the present invention is obtained using a laser.

Specifically, in the method for obtaining the relative position between the radio wave measuring device 200 and the measurement position reference device 300 according to an embodiment of the present invention, two methods using a laser tracker and a laser range finder are presented. do.

In the case of a laser tracker, the relative position of the radio wave measuring device 200 with respect to the position of the measuring position reference device 300 is calculated as a horizontal value, a vertical value, and a height value, and in the case of a laser distance meter, the distance to a specific object is calculated. Measure in straight direction only.

In one embodiment of the present invention, in order to accurately calculate the relative position between the radio wave measuring device 200 and the measurement position reference device 300, a method of obtaining a relative position using a laser tracker is preferable.

The relative position of the radio wave measuring device 200 with respect to the measurement position reference device 300 using the laser tracker includes a horizontal value, a vertical value, and a height value of the radio wave measuring device 200.

The horizontal value and the vertical value of the radio wave measuring device 200 are calculated as distances from the radio wave measuring device 200 to two walls adjacent to the measurement position reference device 300, respectively. The height value of the radio wave measuring device 200 is calculated as the distance between the radio wave measuring device 200 and the floor.

Laser equipment such as laser trackers and laser range finders have the advantages of high accuracy and a large measurable area, making them suitable for indoor positioning. However, since there should be no obstacles between the radio wave measuring device 200 and the measurement position reference device 300, in one embodiment of the present invention, at least one measurement position reference device 300 is basically present in each room.

2 is a plan view showing an example of a radio wave measuring position according to an embodiment of the present invention, Figure 3 is a plan view showing an example of a radio wave measuring area according to an embodiment of the present invention.

As shown in FIG. 2, in the four rooms of Room 2, Room 3, Room 4, and Room 5, the radio wave of the radio wave transmitting apparatus located in Room 1 is to be measured, that is, the first area RE1 and the second room. Assuming that the radio waves are to be measured in the area RE2, the third area RE3, the fourth area RE4, and the fifth area RE5, as shown in FIG. 3, five measurement position reference devices are illustrated. It is preferable that the fields 300, 301, 302, 303, 304 are located at five places of ③, ①, ②, ④, and ⑤ to measure radio waves. In this case, when measuring the radio wave of the radio wave transmitting apparatus in room 4, since room 5 may act as an obstacle, as shown in FIG. 3, in room 4, two areas RE3 and RE4 in which the obstacle does not exist are divided. And two measurement position reference devices 300, 303 are located. That is, the measurement position reference device 300 located in the third area RE3 in room 4 serves as a reference origin of the third area RE3, and another measurement position reference located in the fourth area RE4 in room 4. The device 303 serves as a reference origin of the fourth area RE4.

4 is a block diagram illustrating an internal configuration of a radio wave measuring apparatus shown in FIG. 1.

Referring to FIG. 4, the radio wave measuring apparatus 200 according to an embodiment of the present invention includes a relative position measuring unit 201, an absolute position converting unit 202, a radio wave environment measuring unit 203, and a measurement data storage unit ( 204, a measurement data output unit 205, a drawing image visualization unit 206, and an inter-server communication unit 207.

The relative position measuring unit 201 automatically outputs a relative coordinate value by linking a relative position of the radio wave measuring apparatus with respect to the measuring position reference apparatus 300 with a laser measuring apparatus such as the above-described laser tracker or laser range finder.

The absolute position converting unit 202 converts the relative coordinate value calculated by the relative position measuring unit 201 to an absolute coordinate value based on the absolute position of the measurement position reference device 300.

The radio wave environment measuring unit 203 receives a radio wave environment transmitted from the radio wave transmitting apparatus 100 and measures values such as radio wave strength and transmission success.

The measurement data storage unit 204 stores the position at each measurement point and the radio wave environment measurement result.

The measurement data output unit 205 outputs the measurement data on the screen.

The image visualization unit 206 visually shows the measurement data by mapping the drawing data.

The communication unit 207 is a module required when there is a server managing the measurement data measured by the radio wave environment measurement unit 203 and is responsible for wired or wireless data transmission between the radio wave environment measurement unit 203 and the server.

As described above, the present invention is different from the conventional method of measuring the radio wave environment in the outdoor environment, unlike the conventional technique that can measure the radio wave environment for the indoor target, and can measure the radio wave environment only at a specific location, the measurement position reference device As a reference origin for determining the relative position of the radio wave measuring apparatus, by installing one or more per room in the room, radio wave measurement can be performed at any position in the room.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a view for explaining a method for measuring indoor radio wave environment according to an embodiment of the present invention.

2 is a plan view showing an example of a radio wave measuring position according to an embodiment of the present invention.

3 is a plan view illustrating an example of a radio wave measuring region according to an exemplary embodiment of the present invention.

4 is a block diagram illustrating an internal configuration of a radio wave measuring apparatus shown in FIG. 1.

Claims (16)

A radio wave generator provided in any one of a plurality of rooms in the room and generating radio waves; Receiving a radio wave generated by the radio wave generating apparatus, measuring the intensity of the received radio wave, measuring its relative coordinate value based on the corresponding reference origin among a plurality of reference origin, and measured measured relative coordinate value Radio wave measuring device to convert to; And A plurality of measurement position reference devices provided in all rooms except the one room and serving as the plurality of reference origins for determining relative coordinates of the radio wave measuring device; Indoor radio wave environment measurement apparatus comprising a. The method of claim 1, The radio wave measuring apparatus is an indoor propagation environment measuring apparatus for measuring the relative coordinate value of its own based on the reference origin using a laser. The method of claim 2, The radio wave measuring apparatus is an indoor radio wave environment measuring apparatus for measuring the relative coordinates of its own based on the reference origin using a laser range finder. The method of claim 3, The relative coordinate value includes a horizontal value, a vertical value, and a height value, The horizontal value and the vertical value are distance values between two walls converging to the corresponding measurement position reference device among the plurality of measurement position reference devices, And the height value is a distance value between the radio wave measuring device and the floor. The method of claim 2, The radio wave measuring apparatus is an indoor radio wave environment measuring apparatus for measuring its relative coordinates based on the reference origin using a laser tracker. The radio wave measuring apparatus of claim 1, A relative position measuring unit for calculating the relative coordinate value from the measuring position reference device in conjunction with a laser measuring device; An absolute position converting unit converting the relative coordinate value calculated by the relative position measuring unit into an absolute coordinate value based on the absolute position of the measurement position reference device; A radio wave environment measuring unit for receiving a radio wave transmitted from the radio wave transmitting apparatus and measuring a radio wave intensity value Indoor radio wave environment measurement apparatus comprising a. The method of claim 6, The indoor propagation environment measurement apparatus further comprises a measurement data storage unit for storing the radio wave environment measurement results including the position information and the radio wave intensity value of the absolute coordinate value at each point. The method of claim 6, And a measurement data output unit configured to output the measurement data including the absolute coordinate value and the radio wave environment measurement result to a screen. The indoor propagation environment measurement apparatus of claim 8, further comprising an image visualization unit which visually maps the measurement data to a drawing image. The method of claim 8, Indoor communication environment measurement apparatus further comprises a communication unit for performing data communication in a wired or wireless communication method with the server managing the measurement data. Installing a radio wave generating device for generating radio waves in any one of a plurality of rooms in the room; Receiving a radio wave generated by the radio wave generation device by the radio wave measuring device, measuring the intensity of the received radio wave, and measuring a relative coordinate value of the self based on a corresponding reference origin among a plurality of reference origins; Converting, by the radio wave measuring apparatus, the measured relative coordinate value into an absolute coordinate value; And A plurality of measurement position reference apparatuses serving as the plurality of reference origins for determining relative coordinates of the radio wave measuring apparatus, wherein the plurality of measurement position reference apparatuses are installed in all the remaining rooms except the one room; Indoor radio wave environment measurement method comprising a. The method of claim 11, wherein the measuring of the relative coordinate value comprises: And the radio wave measuring device measures the relative coordinate value using a laser. The method of claim 13, wherein the measuring of the relative coordinate value comprises: And the radio wave measuring device measures the relative coordinate value using a laser range finder. The method of claim 13, wherein the relative coordinate value comprises a horizontal value, a vertical value and a height value, The horizontal value and the vertical value are distance values between two walls converging to the corresponding measurement position reference device among the plurality of measurement position reference devices, And the height value is a distance value between the radio wave measuring device and the floor. The method of claim 12, wherein the measuring of the relative coordinate value comprises: And the radio wave measuring device measures the relative coordinate value using a laser tracker. The method of claim 11, Calculating, by the radio wave environment measuring device, the relative coordinate value from the measurement position reference device in association with a laser measuring device; Converting, by the propagation environment measurement device, the calculated relative coordinate value to an absolute coordinate value based on an absolute position of the measurement position reference device; Receiving, by the radio wave environment measuring device, a radio wave transmitted from the radio wave transmitting device and measuring a radio wave intensity value; Indoor radio wave measurement method further comprising.

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