KR20160062720A

KR20160062720A - Apparatus and method for recognizatng location

Info

Publication number: KR20160062720A
Application number: KR1020150165053A
Authority: KR
Inventors: 이석진; 이문식
Original assignee: 한국전자통신연구원
Priority date: 2014-11-25
Filing date: 2015-11-24
Publication date: 2016-06-02

Abstract

According to the present invention, a method for recognizing a location comprises: a step of receiving a wireless signal from each of two wireless signal generation devices which maintain a pre-determined distance, and being linked by a cable; a step of calculating a distance from each of the two wireless signal generation devices from a receiving time of the wireless signal separately received from each of the two wireless signal generation devices; and a step of acquiring the current location by using a distance difference calculated by each of the two wireless signal generation devices and a distance between the two wireless signal generation devices. The present invention provides a method for recognizing a location, which may provide precise location information.

Description

[0001] APPARATUS AND METHOD FOR RECOGNIZATING LOCATION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a position recognition apparatus and method, and more particularly, to a position recognition apparatus and method using a radio signal generator for transmitting a short-range wireless signal.

There are various services using indoor and outdoor location information. Also, the demand for services related to location will continue to increase. In this case, the resolution of the position coordinate is precise and the time required to calculate the position is fast so that the service can be provided through various applications.

A GPS (Global Positioning System) satellite method is well known as the current location recognition technology. The satellite signals sent by GPS satellites include the position of the satellites and the time of flight of the satellites. The position recognition system using GPS satellites calculates the position coordinates of the measurement object using data of satellite signals received from four or more satellites. Such a position recognition system is available where it can receive satellite signals of GPS satellites.

Another known location recognition technique is to use a signal arriving at a mobile communication base station. This method calculates the position of the measurement object using techniques such as Angle Of Arrival (AOA), Time of Arrival (TOA), Time Difference Of Arrival (TDOA) do.

There is also a method of recognizing the strength of a signal received from a WiFi-AP (Access Point) of a wireless LAN installed in the office environment or a fingerprint using a fingerprint.

Such position recognition techniques are difficult to use in cases where the recognition time required for the position recognition needs to be fast or the position accuracy is required.

On the other hand, in order to compensate for the accuracy of the position, a method of combining the above-mentioned position recognition technologies has been attempted.

A problem to be solved by the present invention is to provide a position recognition apparatus and a method capable of providing quick and precise position information as compared with a method using a GPS or a mobile communication base station.

According to an embodiment of the present invention, a method for recognizing a position of a position recognition apparatus is provided. A method of recognizing a position includes the steps of receiving a radio signal from two radio signal generators connected by a cable and maintaining a predetermined distance, receiving a radio signal from each of the two radio signal generators And obtaining a current position using the difference between the calculated distances from the two radio signal generators and the distance between the two radio signal generators.

According to the embodiment of the present invention, by calculating the position coordinates using only two radio signal generators for transmitting the radio signal, it is possible to use it when it is necessary to take time to grasp the position or to request the precise position, It is available.

Also, the wireless signal generator can be robust against environmental changes by using multiple antennas.

Further, the position recognition support system according to the embodiment of the present invention calculates position coordinates using a situation where a cable is connected between two radio signal generators and maintains a certain distance, thereby correcting the influence of the temperature and humidity of the radio wave propagating space by itself There is also an advantage of having an environment to do.

1 is a block diagram of a wireless signal generator used in a position recognition support system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a method of transmitting a radio signal using beam forming of the radio signal generator shown in FIG. 1. Referring to FIG.
3 is a diagram illustrating a position recognition support system according to an embodiment of the present invention.
4 is a diagram illustrating a distance between a position recognition apparatus and a wireless signal generating apparatus, which is calculated by the position recognizing apparatus according to an embodiment of the present invention.
5 is a view showing a distance difference from the two radio signal generators shown in FIG.
6 is a view showing the position of the position recognition apparatus due to the difference in distance shown in FIG.
7 is a flowchart illustrating a method of recognizing a position of a position recognition apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a system and method for supporting position recognition according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram illustrating a wireless signal generator used in a position recognition support system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a wireless signal transmission method using beamforming of the wireless signal generator shown in FIG. to be.

Referring to FIG. 1, the radio signal generator 100 is a dedicated short-range radio apparatus that replaces the role of a GPS satellite, and transmits a radio signal.

The wireless signal generator 100 includes multiple antennas 110. [ The wireless signal generator 100 can transmit and receive wireless signals in a desired direction by controlling the phases of the multiple antennas 110. [ 2, the wireless signal generator 100 generates a beam in a desired direction to maximize the amount of propagation and minimizes the amount of propagation in the other direction, thereby providing a wireless signal The utilization as a signal source can be enhanced.

3 is a diagram illustrating a position recognition support system according to an embodiment of the present invention.

Referring to FIG. 3, the position recognition support system 300 includes two wireless signal generators 310 and 320 and a position recognizer 330.

The radio signal generators 310 and 320 are the radio signal generators 100 shown in FIG. The wireless signal generators 310 and 320 are connected by a cable and the wireless signal generators 310 and 320 maintain a certain distance.

The wireless signal generators 310 and 320 may be synchronized in time with each other and may have a separate synchronization assist device for time synchronization of the wireless signal generators 310 and 320.

The wireless signal generators 310 and 320 form a beam in the direction of the position recognizer 330 and transmit a wireless signal.

The location recognition device 330 is a device owned by a user who is provided with a service. The position recognition apparatus 330 receives the radio signals transmitted from the radio signal generators 310 and 320 and calculates the current position using the radio signals of the received radio signal generators 310 and 320.

The position recognition device 330 measures the reception time of the radio signal transmitted from the radio signal generators 310 and 320 and calculates the difference between the reception times of the radio signals transmitted from the radio signal generators 310 and 320 . The reception time of the transmitted radio signal may include a time when the radio signal reaches the outside of the position recognition device 330 and an internal recognition processing time of the position recognition device 330. The internal recognition processing time means the signal processing time in the device internal circuit. Although the path length of the radio signal may be different depending on the reception position of the position recognition apparatus 330, the internal recognition processing time is the same, and therefore the internal recognition processing time will be omitted. However, the environmental factor can be applied so that the internal recognition processing time can be corrected according to the temperature characteristic of the RF signal circuit inside the position recognition device 330. [ At this time, the correction method is a method using a constant length transmission characteristic connected by a cable.

The position recognizing device 330 calculates the distance between the wireless signal generating device 310 and the position recognizing device 330 and the distance between the wireless signal generating device 320 and the position recognizing device 330 from the difference between the reception time of the measured wireless signal and the reception time between wireless signals, The distance between the devices 330 is calculated. The position recognition device 330 calculates the difference between the distance between the wireless signal generator 310 and the position recognition device 330 and the distance between the wireless signal generator 320 and the position recognition device 330, And calculates the position of the position recognition device 330 using the difference and the distance between the wireless signal generators 310 and 320.

The distance between the wireless signal generators 310 and 320 may be a distance between the wireless signal generators 310 and 320 after the wireless signal is transmitted from one wireless signal generator 310 For example, it may be calculated through the time until it is received at 320. This time may mean the time required for the wireless signal to pass through the distance between the wireless signal generators 310 and 320.

For example, the time from when the wireless signal is transmitted in the wireless signal generator 310 to when the wireless signal is received in the other wireless signal generator 320 can be calculated in the wireless signal generator 310, 320 have. At this time, the environmental factor may be applied so that the internal recognition processing time can be equally corrected according to the temperature characteristic of the RF signal circuit in the wireless signal generators 310 and 320. The wireless signal generators 310 and 320 inform the position recognition device 330 of the calculated time information. The wireless signal generators 310 and 320 may form the beam in the direction of the position recognizer 330 and may include the calculated time information in the transmitted wireless signal. Alternatively, the wireless signal generators 310 and 320 may notify the position recognition device 330 of the time information calculated using separate communication data.

The location recognition device 330 may calculate the distance between the wireless signal generators 310 and 320 with the general radio path propagation speed of the radio wave and the time information received from the wireless signal generators 310 and 320.

FIG. 4 is a view illustrating a distance between a position recognition apparatus and a wireless signal generating apparatus, which is calculated by the position recognizing apparatus according to the embodiment of the present invention. FIG. 5 is a view showing a distance difference from the two wireless signal generating apparatuses shown in FIG. And FIG. 6 is a view showing the position of the position recognition apparatus due to the difference in distance shown in FIG.

4, the position recognition device 330 calculates the distance between the wireless signal generators 310 and 320 and the position recognition device 330 based on the reception time of the wireless signals transmitted from the wireless signal generators 310 and 320, (Ra, Rb). When the distance Rc between the radio signal generators 310 and 320 defined in the position recognizing apparatus 330 is obtained, the three sides of the triangle composed of the position recognizing apparatus 330 and the radio signal generators 310 and 320 You can get the length.

5, the position recognition device 330 calculates a distance Ra between the wireless signal generation device 310 and the position recognition device 330, a distance between the wireless signal generation device 320 and the position recognition device 330, And calculates the difference (Rd = Ra-Rb) of the inter-vehicle distance Rb.

The curve with the distance of the points from the two vertices is called the hyperbolic function. As shown in Fig. 5, when the distance difference Rd is calculated, the difference between the distances Rd becomes the information for calculating the position of the position recognition device 330. [

6, when there is no difference in distance Rd from the wireless signal generators 310 and 320, the position recognizing device 330 is located on a straight line from P1 to the center. On the other hand, when the distance difference Rd increases, the position recognizing device 330 is positioned at a point on the curve according to the distance difference Rd. When the difference between the distances Rd is the maximum, the position recognizing apparatus 330 is positioned on the straight line in the P3 direction.

Therefore, the position recognition device 330 can recognize the position of the position recognition device 330 based on the distance Rc between the wireless signal generators 310 and 320 and the distance difference Rd from the wireless signal generators 310 and 320 Can be calculated.

That is, the position recognition support system 300 according to the embodiment of the present invention allows the position recognition device 330 to calculate the position using only the two wireless signal generators 310 and 320. [ This method can provide a faster and more precise position compared to a method using a GPS satellite having a long transmission distance, a multipath effect due to a ground obstacle, and a method using a mobile communication base station having a low accuracy or reliability due to a terrestrial mobile object.

7 is a flowchart illustrating a method of recognizing a position of a position recognition apparatus according to an embodiment of the present invention.

Referring to FIG. 7, the position recognition apparatus 330 receives radio signals transmitted from the radio signal generators 310 and 320 (S710).

The position recognition apparatus 330 calculates a reception time of the radio signal transmitted from the two radio signal generators 310 and 320 (S720).

The position recognition apparatus 330 calculates distances from the wireless signal generators 310 and 320 using the reception times of the wireless signals transmitted from the wireless signal generators 310 and 320, respectively (S730).

The position recognition apparatus 330 calculates the difference in distance from the calculated radio signal generators 310 and 320 (S740).

The position recognition apparatus 330 calculates the current position of the position recognition apparatus 330 using the calculated distance difference and the distance between the two wireless signal generators 310 and 320 (S750).

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented by a program for realizing functions corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. The embodiments can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims

A position recognition method for a position recognition apparatus,
Receiving radio signals from two radio signal generators connected by cables and maintaining a predetermined distance,
Calculating a distance from each of the two radio signal generators from a reception time of a radio signal received from each of the two radio signal generators,
Acquiring a current position using a difference between distances computed from each of the two radio signal generators and a distance between the two radio signal generators;
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