KR20120034355A - Positional information transmitting device, positional information receiving device, positional information obtaining method, and positional information based service system - Google Patents

Abstract

PURPOSE: A location information transmitting device, a location information receiving device, a location information obtaining method, and a location based service system are provided to obtain location information from a fixed location information transmitting device by adding a floating location information transmitting device. CONSTITUTION: Location information is transmitted by a fixed location information transmitting signal in the same zone or type as a GNSS(Global Navigation Satellite System)(S231). The fixed location information transmitting signal of the location information is detected(S232). The location information is checked based on a fixed location information receiving signal(S230). When at least one fixed location information transmitting signal is detected, a transmission frame is extracted from the fixed location information receiving signal. Information in the extracted transmission frame is obtained as the location information.

Description

POSITIONAL INFORMATION TRANSMITTING DEVICE, POSITIONAL INFORMATION RECEIVING DEVICE, POSITIONAL INFORMATION OBTAINING METHOD, AND POSITIONAL INFORMATION BASED SERVICE SYSTEM}

The present invention relates to a location information transmitting apparatus, a location information receiving apparatus, a location information obtaining method, and a location based service system.

As technology advances, navigation technology is also developing. A typical navigation technology that has been widely used recently is the Global Navigation Satellite System (GNSS). Global satellite navigation system is a system that installs a navigation satellite in the earth orbit, and determines the position of the receiver based on the signals received from the navigation satellites.

Global satellite navigation systems include the Global Positioning System (GPS) in the United States, Galileo in Europe, GLONASS in Russia, and the Big Dipper in China.

SUMMARY OF THE INVENTION An object of the present invention is to provide a location information transmitting apparatus having an improved location function, a location information receiving apparatus, a location information obtaining method, and a location based service system.

Another object of the present invention is to provide a location information transmitting apparatus, a location information receiving apparatus, a location information obtaining method, and a location based service system having a function of providing an additional service together with stable location checking.

According to an aspect of the present invention, there is provided a method for obtaining location information, comprising: transmitting fixed location information based on the same frequency band and modulation scheme as a Global Navigation Satellite System (GNSS) without visual synchronization; Detecting the transmitted fixed location information transmission signal based on the same demodulation scheme as the GNSS; And acquiring the position information from the detected fixed position information transmission signal.

In an embodiment, the fixed location information transmission signal is transmitted from a fixed source fixed on the ground, these fixed sources are not synchronized with each other, and the location information includes the location information of the fixed source.

That is, the fixed sources transmit location information in the same frequency band and the same modulation scheme as GNSS, but have no synchronization system.

In an embodiment, when a plurality of fixed position information transmission signals are detected, a signal having the strongest signal is selected among the plurality of fixed position information transmission signals detected, and the position information is obtained from the selected signal, or the detected plurality Position information is respectively obtained from the fixed position information transmission signals of and the obtained position information is selected or calculated as final position information according to the received signal size.

According to an embodiment, the method may further include detecting a floating position information transmission signal, and when the floating position information transmission signal is detected to be a specific number or more, trajectory information and time of sources of the detected floating position information transmission signals. Information is extracted from the detected floating position information transmission signals, and second position information is obtained based on the extracted trajectory information and time information.

In example embodiments, the position information extracted from the fixed position information transmission signal may be compared with the second position information extracted from the floating position information transmission signal, and the second position information may be extracted from the floating position information transmission signal. Compensate for location information.

In an embodiment, the fixed location information transmission signal further includes additional information, and the additional information is stored before the fixed location information transmission signal is sent.

In accordance with another aspect of the present invention, a method of obtaining location information may include transmitting location information and additional information as a fixed location information transmission signal; Detecting by the transmitted fixed position information transmission signal; And acquiring the location information and the additional information based on the detected fixed location information received signal.

According to an aspect of the present invention, there is provided a stationary location information transmitting apparatus comprising: a controller configured to store location information; A data processor configured to receive the location information from the controller and to frame the received location information to generate transmission information; Receive the transmission information from the data processor, receive modulation information from the controller, and baseband modulate the received transmission information according to the received modulation information in the same manner as a GNSS to generate a baseband signal. A baseband modulator; A carrier modulator configured to receive the baseband signal from the baseband modulator, and generate a transmission signal by carrier modulating the received baseband signal; And an antenna configured to receive the transmission signal from the carrier modulator and to transmit the received transmission signal.

In an embodiment, the baseband modulator is configured to spread spread modulate the received transmission information using the same code.

As an embodiment, since the carrier modulator and the antenna use a carrier having the same frequency as the GNSS, the carrier modulator and the antenna are configured to transmit at a low power level of noise so that there is no problem in receiving the GNSS signal from the existing GNSS receiver.

In an embodiment, the location information is stored in advance in the controller before the device transmits the location information through the data processor, the baseband modulator, the carrier modulator, and the antenna.

In an embodiment, the location information is information on a location where the fixed location information transmitting device is installed, and includes information indicating a location such as an address, place name, building name, and store name, as well as coordinate information representing latitude and longitude. do.

In an embodiment, the controller is configured to further store advertisement information, wherein the advertisement information is framed by the data processor together with the location information.

In an embodiment, the controller is configured to further store the announcement information, which is framed by the data processor together with the location information.

In accordance with one aspect of the present invention, an apparatus for receiving mobile location information includes an antenna for outputting a received signal; An amplifier configured to amplify the received signal to produce an amplified signal; A carrier demodulator configured to carrier demodulate the amplified signal to generate a demodulated signal; A signal processor configured to extract received information for each code assigned from the demodulated signal; And a location calculator configured to obtain location information from the received information, wherein the signal processor receives the demodulated signal from the demodulated signal using codes assigned to fixed location information transmission and codes assigned to floating location information transmission. And to detect the information.

In an embodiment, the signal processor is configured to extract code phases of transmission signals from a plurality of fixed position transmitters using the same code and simultaneously detect a plurality of reception information.

In an embodiment, the signal processor is configured to simultaneously detect not only the fixed position information but also the transmission signal from the floating satellite of the GNSS using a plurality of assigned codes.

In an embodiment, the location-based service providing device is configured to store in advance information indicating the location of the location-based service providing device, and provide the pre-stored information as the location information to the mobile device.

In an embodiment, the location-based service providing apparatus may store the advertisement information, the announcement information, or the advertisement information and the announcement information related to the location of the location-based service providing apparatus in advance, and the previously stored advertisement information, the notification information, or And provide advertisement information and announcement information to the mobile device.

Location-based service system according to an embodiment of the present invention is location-based service providing apparatus; And a mobile device configured to receive location information from the location based service providing device, and further receive advertisement information, announcement information, or advertisement information and announcement information related to the location information from the location based service providing device. .

An embodiment of the present invention is configured to automatically store location information and additional information when location information obtained by granting fixed location information in a mobile receiving device is maintained for a predetermined time or more.

According to an embodiment of the present invention, in addition to the floating position information transmitting apparatus, position information is obtained from the fixed position information transmitting apparatus. Accordingly, there is provided a location information transmitting apparatus having an improved location function, a location information receiving apparatus, a location information obtaining method, and a location based service system.

According to an embodiment of the present invention, the fixed location information transmitting device transmits additional information stored together with the location information. Accordingly, a location information transmitter, a location information receiver, a location information acquisition method, and a location-based service system are provided.

1A is a diagram illustrating a location information acquisition system according to an embodiment of the present invention.
FIG. 1B is a view illustrating a global navigation satellite system (GNSS) according to an embodiment of the present invention.
2 is a block diagram illustrating an apparatus for transmitting fixed location information according to an embodiment of the present invention.
3 is a flowchart illustrating a method of operating a fixed location information transmitter according to an embodiment of the present invention.
4 is a block diagram illustrating a mobile location information receiving apparatus 400 according to an embodiment of the present invention.
5A is a flowchart illustrating a location obtaining method according to an embodiment of the present invention.
5B is a flowchart illustrating a location obtaining method according to another exemplary embodiment of the present invention.
6 is a diagram illustrating a location-based service system according to an exemplary embodiment.
7 illustrates a location based service system according to another exemplary embodiment of the present invention.

The GNSS system calculates the position of the GNSS receiver by measuring the delay time of the satellite signal at the GNSS receiver by receiving a constant signal of evenly distributed satellites on the earth. For example, the first commercially available GNSS system, the Global Positioning System (GPS) was designed and operated for US military use by the US Department of Defense. The GPS receiver receives signals from 24 satellites orbiting the earth at 12 hours. GPS receivers generally receive four or more satellite signals. The GPS receiver can know the position of the receiver by performing a series of signal processing on the received satellite signal.

GNSS receiver technology continues to evolve. In general, in an environment such as outdoor where there is no obstacle, the strength of the received signal is guaranteed and there is no problem in positioning. If the signal from the GNSS satellites is weak (eg, still between tall buildings, indoors, etc.), location tracking is not possible with conventional GNSS receivers.

However, various location-based services are needed not only outdoors but also indoors. In particular, emergency calls, such as when the Federal Communications Commission mandates location tracking for emergency calls, are likely to occur indoors or in places with severe attenuation of signals from GNSS satellites. Therefore, for GNSS-based location tracking service in emergency situations such as various services or disasters, the performance enhancement of GNSS-based location tracking is required.

Pseudosatellite systems have been devised and used in part as systems that enable positioning in indoor environments. The pseudosatellite system is configured to be separated from the GNSS receiver in the same form and code as the GNSS signal standard on the ground or indoors. Thus, if GNSS satellites are not received or available with fewer than the number of satellites needed to calculate the position, the pseudosatellite system provides the positioning of the pseudosatellite signal either auxiliary or only with the pseudosatellite signal.

For this positioning, the satellite in the GNSS system uses a very accurate clock to ensure accurate time synchronization. The ground observation station and the central control station are operated to correct this clock to ensure positional performance. Similarly, the pseudosynchronization of the pseudosatellite in a pseudosatellite system is very important and can cause performance problems. In addition, when the GNSS receiver is close to a pseudosatellite, the distance from the transmitter becomes very close to the distance from the actual satellite. Therefore, the pseudosatellite signal is very large compared to the signal received from the actual satellite, and thus a problem may occur that the satellite signal cannot be received. Therefore, such pseudosatellite systems have a relatively high system configuration cost and are in limited use.

In order to solve the above problem, the fixed position information transmitting apparatus is installed at a position where direct radio wave reception from a satellite is difficult to transmit, thereby transmitting position information and / or additional information in a GNSS scheme and / or band. The mobile location information receiving device adjacent to the fixed location information transmitting device may identify the location based on the location information.

For example, a fixed location information transmission device is installed in a region (eg, in a building, underground, etc.) where it is difficult to accurately receive a radio wave from a GNSS satellite and transmits location information that can be received by a general GNSS receiver. More specifically, the transmission signal of the fixed location information transmitting apparatus is transmitted in the same frequency band, code, and modulation scheme as the GNSS so that a general GNSS receiver can receive it. However, the fixed position information transmitter is not synchronized with the GNSS and no time synchronization is required between the fixed position transmitters. The transmitted information includes information on the location where the fixed location information transmission device is installed (latitude, longitude, or textual information representing the location such as address, place name, building name, and store information), and the transmission power level is the performance of the existing GNSS receivers. Transmit with low power of noise level class so as not to affect.

As such, the fixed position information transmitting device does not need a complicated synchronization function and can be configured at a low cost because it is transmitted at low power.

The fixed location information transmitting device may be distinguished by using a separate designation method within the GNSS signal specification so that the mobile location information receiving device is not confused with the satellite signal. For example, in the case of GPS, a code for distinguishing satellites is assigned. Therefore, the GNSS receiver is available and a separate code is assigned to the fixed position transmitter, rather than the code used by the satellite. However, in the case of satellites and weft satellites, all satellites are assigned different codes, whereas fixed location transmitters are assigned the same code since the number of satellites is enormous. The mobile location information receiving apparatus adds only software for receiving a transmission signal of the fixed location information transmitting apparatus to the existing application GNSS receiver. In this case, the mobile location information receiving apparatus may output the location information using the function of the existing GNSS receiver and / or the location information of the fixed location information transmitting apparatus.

 As such, the mobile location information receiving device may be configured by changing only software to use the hardware of the existing GNSS receiver and to receive the transmission signal of the fixed location information transmitting device.

As such, the low-power fixed location information transmitting device installed indoors and outdoors is provided in addition to the conventional GNSS system, and the fixed location information transmitting device does not provide a problem to the operation of the existing GNSS receiver. The location can be provided and additional services can be provided even indoors.

The low power fixed position information transmitting apparatus is basically set to have an output such that there is no problem in receiving a GNSS signal from the satellite, and information related to an installation place may be changed at the time of installation or as necessary. That is, the mobile location information receiving apparatus may recognize the case when it is adjacent to the fixed location information transmitting apparatus and collect and utilize information.

Meanwhile, the apparatus for transmitting mobile location information may not include the function of the existing GNSS receiver.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art may easily implement the technical idea of the present invention. . Identical components will be referred to using the same reference numerals. Similar components will be referred to using similar reference numerals.

1A is a diagram illustrating a system for obtaining location information according to an exemplary embodiment. Referring to FIG. 1A, a location information acquisition system includes a site 110, a building 120, first to sixth fixed sources 300a to 300f, and first and second receivers 400a and 400b. do.

The first to sixth fixed sources 300a to 300f are devices that are fixed on a structure such as the site 110 or the building 120 to transmit location information. In exemplary embodiments, the first to sixth fixed sources 300a to 300f may be configured to use the same communication method as the communication method used by the floating sources (not shown). The first to sixth fixed sources 300a to 300f may use the same code and are configured to use each other without visual synchronization. The first to sixth fixed sources 300a to 300f may transmit the location information and / or additional information as the fixed location information transmission signal in the same band or manner as the GNSS.

The first and second receivers 400a and 400b are configured to receive location information from the first to sixth fixed sources 300a to 300f. The first and second receivers 400a and 400b detect a fixed position information transmission signal asynchronously from the first to sixth fixed sources 300a to 300f. The first and second receivers 400a and 400b are configured to obtain their position from the fixed position information received from the respective fixed sources and the magnitude of the received signal. In exemplary embodiments, the first and second receivers 400a and 400b may be mobile terminals such as navigation, a smartphone, a tablet computer, and the like.

FIG. 1B is a diagram illustrating a global navigation satellite system (GNSS) according to another embodiment of the present invention. Referring to FIG. 1B, the positioning system includes a site 110, a building 120, first to third floating sources 200a to 200c, first to third fixed sources 300a to 300c, and The first and second receivers 400a and 400b are included.

The first to third floating sources 200a to 200c include navigation satellites located in the Earth's atmosphere or Earth's orbit. In exemplary embodiments, the first to third floating sources 200a to 200c may include a Global Positioning System (GPS) satellite, a GLONASS satellite, a Galileo satellite, a Big Dipper satellite, and the like. For example, the first to third floating sources 200a to 200c may include a pseudosatellite suspended in the earth's atmosphere.

The first to third fixed sources 300a to 300c are devices that are fixed on a structure such as the site 110 or the building 120 to transmit location information. In exemplary embodiments, the first to third fixed sources 300a to 300c may be configured to use the same communication method as the communication method used by the first to third floating sources 200a to 200c.

The first and second receivers 400a and 400b are configured to receive location information from the first to third floating sources 200a to 200c and the first to third fixed sources 300a to 300c. The first and second receivers 400a and 400b are separated by codes to distinguish the fixed sources 300a to 300c and the floating sources 200a to 200c, and in the case of the floating source, the same method as that of the existing GNSS. The position can be calculated.

As shown in FIG. 1B, the first and second receivers 400a, 400b receive location information from the floating sources 200a-200c as well as the fixed sources 300a-300c. In addition, even in a shaded area where communication with the floating sources 200a to 200c is inhibited, such as a structure such as a building 120, underground, or mountainous terrain, location information may be obtained from the fixed sources 300a to 300c. Can be. Thus, the positioning function of the first and second receivers 400a and 400b is improved. The location information from the fixed sources 300a to 300c may include a place name, a building name, a doorway sign, an address, a store information, etc. in addition to the latitude, longitude, and altitude. In exemplary embodiments, the first and second receivers 400a and 400b may be mobile terminals, such as navigation and a smart phone.

2 is a block diagram illustrating a fixed location information transmitting apparatus 300 according to an embodiment of the present invention. In exemplary embodiments, the fixed location information transmitting apparatus 300 may correspond to the first to third fixed sources 300a to 300c described with reference to FIG. 1B, respectively.

Referring to FIG. 2, the fixed location information transmitting apparatus 300 includes an interface 310, a controller 320, an internal clock generator 330, a data processor 340, a baseband modulator 350, and a carrier modulator 360. And an antenna 370.

The interface 310 is connected with the controller 310. The interface 310 is configured to exchange data with the outside. In exemplary embodiments, the interface 310 may include a user input device. In exemplary embodiments, setting information SI of the fixed location information transmitting device 300 may be provided through the interface 310. The setting information SI may include location information. The setting information SI may further include additional information such as advertisement information, notification information, disaster information, risk information, and the like. The setting information SI may be provided to the interface 310 through wired or wireless communication.

The controller 320 is configured to control overall operations of the fixed location information transmitting device 300. The controller 320 is configured to operate based on the clock signal generated by the internal clock generator 330. The controller 320 is configured to store setting information SI transmitted over the interface 310.

The controller 320 is configured to provide the location information LI to the data processor 340. For example, the controller 320 may extract information indicating a location from the stored setting information SI, and provide the extracted information to the data processor 340 as the location information LI.

The controller 320 may additionally provide additional information AI to the data processor 340. In exemplary embodiments, the additional information AI may include advertisement information, announcement information, or advertisement information and announcement information.

The controller 320 is configured to provide modulation information MI to the baseband modulator 350. For example, the controller 320 is configured to extract the modulation information MI from the stored setting information SI and provide the extracted modulation information MI to the baseband modulator 350.

As another example, the controller 320 may be configured to provide modulation information MI to the carrier modulator 360 rather than the baseband modulator 350. Whether the controller 320 provides the modulation information MI to the baseband modulator 350 or the carrier modulator 360 may be determined according to the communication method of the fixed location information transmitting apparatus 300.

The data processor 340 is configured to receive the location information LI from the controller 320. The data processor 340 is configured to frame the received position information LI to generate transmission information TXI.

When the additional information AI is additionally provided from the controller 320, the data processor 340 is configured to frame the additional information AI provided with the location information LI.

The transmission information TXI generated by the data processor 340 is provided to the baseband modulator 350.

Hereinafter, operations of the baseband modulator 350 and the carrier modulator 360 according to the communication method is described. First, it is assumed that the fixed location information transmitting apparatus 300 communicates based on code division multiple access (CDMA).

Baseband modulator 350 is configured to receive transmission information TXI from data processor 340 and to receive modulation information MI from controller 320. The baseband modulator 350 is configured to baseband modulate the received transmission information TXI according to the received modulation information MI.

By way of example, the baseband modulator 350 is configured to spread spread modulate the transmission information (TXI). In this case, the modulation information MI may correspond to a pseudo random noise (PRN) code to be used in spread spectrum modulation.

In GPS, a type of GNSS, PRN codes are assigned as follows.

PRN number PRN allocation 1 to 63 GPS 64-119 GBAS (Ground Based Argumentation System) 120-158 Satellite Based Argumentation System (SBAS) 159-210 Etc

As shown in Table 1, PRNs are assigned to GPS satellites, SBAS, and GBAS, respectively, and many PRNs are unused. The baseband modulator is spread modulated according to the PRN assigned to the fixed position information transmitter among the PRNs.

The baseband modulator 350 baseband modulates the transmission information TXI to generate a baseband signal BI. The baseband signal BI is provided to a carrier modulator 360.

The carrier modulator 380 is configured to receive the baseband signal BI from the baseband modulator 350. The carrier modulator 390 is configured to modulate the received baseband signal BI using a carrier having a specific frequency. The modulated transmission signal TS is transmitted through the antenna 370.

3 is a flowchart illustrating a method of operating the fixed location information transmitting apparatus 300 according to an embodiment of the present invention. 2 and 3, in step S110, setting information SI is received and stored. In exemplary embodiments, configuration information SI may be received from the outside through the interface 310. The setting information SI includes the position information LI. The location information LI includes information on a location where the fixed location information transmitting device 300 is installed.

For example, the location information LI may include latitude and longitude information of a place where the fixed location information transmitting device 300 is installed. The location information LI may further include information about a height (altitude) at which the fixed location information transmitting device 300 is installed. The location information LI may include information about a place name, a building name, a doorway sign, an address, store information, etc. of a location where the fixed location information transmitting device 300 is installed. The location information LI may include a name of a building where the fixed location information transmitting device 300 is installed.

In exemplary embodiments, the setting information SI may further include additional information AI. The additional information AI may include advertisement information, announcement information, or advertisement information and announcement information. The notification information may include warning information informing of a hazardous area, evacuation information regarding an emergency exit, or property information.

Advertising information and announcement information may be associated with the location information (LI). For example, the advertisement information and the announcement information may include advertisements and announcements related to the location where the fixed location information transmitting device 300 is installed. For example, the advertisement information may include the name of a building or structure in which the fixed location information transmitting device 300 is installed, store information, service information, product information, price information, and the like. For example, the announcement information may include a message related to a location where the fixed location information transmitting device 300 is installed. For example, the notification information may include a danger zone notification message, an access restriction notification message, a no entrance notification message, a security zone notification message, and the like. For example, the notification information may include a shop zone notification message, a residential area notification message, a parking area notification message, a recreation area notification message, a child protection area notification message, a minor access prohibited area notification message, and the like.

In operation S120, a service start event is detected. By way of example, an event is detected that causes the fixed location information transmitting device 300 to start transmitting the location information LI. For example, a service start event may be detected at the same time as power-up, acknowledgment of operation of an operation start button, reception of a message informing of operation start, or elapse of a timer.

In step S130, the stored information is framed to generate the transmission information (TXI). The data processor 340 will receive and frame the location information LI from the controller 320. When the additional information AI is additionally provided from the controller 320, the data processor 340 will frame the additional information AI together with the location information LI.

In step S140, the transmission information TXI is baseband modulated to generate a baseband signal BI. In step S150, the baseband signal BI is carrier modulated to generate a transmission signal TS. The transmission signal TS may be a signal based on CDMA or FDMA.

In step S160, the transmission signal TS is transmitted.

As described above, the location information LI and the additional information AI are stored in advance before the fixed location information transmitting device 300 starts the service. After starting the service, the fixed location information transmitting device 300 transmits previously stored location information LI, time information TI, and additional information AI.

In exemplary embodiments, the additional information AI stored in the fixed location information transmitting device 300 may be updated. After the additional information AI is updated, the fixed location information transmitting device 300 may transmit the updated additional information AI in advance.

4 is a block diagram illustrating a mobile location information receiving apparatus 400 according to an embodiment of the present invention. In exemplary embodiments, the mobile location information receiving apparatus 400 may correspond to the first and second receivers 400a and 400b described with reference to FIG. 1B.

Referring to FIG. 4, the mobile location information receiving apparatus 400 includes an antenna 410, an amplifier 420, a carrier demodulator 430, a signal processor 440, a location calculator 450, an interface 460 , and storage. Group 470.

The antenna 410 is configured to output the received signal RS. The received signal RS is provided to the amplifier 420. The amplifier 420 amplifies the received signal RS to generate an amplified signal AS. The amplified signal AS is provided to the carrier demodulator 430.

The carrier demodulator 430 is configured to carrier demodulate the amplified signal AS to generate a demodulated signal DS. The demodulated signal DS is provided to the signal processor 440.

The signal processor 440 is configured to extract the received information RI from the demodulated signal DS. The extracted received information RI is provided to the position calculator 450.

For example, when the mobile location information receiving apparatus 400 communicates based on CDMA, the carrier demodulator 430 may carrier demodulate the amplified signal AS using a carrier having a specific frequency. The signal processor 440 receives the received information RI from the demodulation signal DS using the PRN codes assigned to the floating position information transmitting apparatus 200 and the PRN codes assigned to the fixed position information transmitting apparatus 300. Will extract

When the received signal RS is provided from the floating position information transmitting apparatus 200, the received information RI may extract time information and orbit information according to a GNSS frame type. The location calculator 450 calculates the location information LI from the extracted received information RI in the same manner as the general GNSS.

When the received signal RS is provided from the fixed location information transmitting device 300, the received information RI includes the location information transmitted from the fixed location information transmitting device 300 and the magnitude of the received signal. The location calculator 450 may extract the location information LI based on the transmission location information of the reception information RI and the reception signal size. The extracted location information LI is provided to the interface 460.

When the additional information AI is additionally included in the received signal RS, the signal processor includes the additional information in the received information RI. The location calculator 450 extracts the additional information AI from the received information RI.

The interface 460 outputs the location information LI and the additional information AI provided from the location calculator 450. For example, the interface 460 may output the location information LI to a screen or through sound. When additional information AI is additionally provided from the position calculator 450, the interface 460 outputs the additional information AI. For example, the interface 460 outputs additional information AI through a screen or through sound.

In addition, when the extracted location information LI from the fixed location transmitter remains the same for a predetermined time, the interface 460 may send the location information LI and the additional information AI to the storage unit 470 to store the location information LI. have. Information about a place visited by the mobile location receiving apparatus may be automatically stored and searched.

5A is a flowchart illustrating a location obtaining method according to an embodiment of the present invention.

Referring to FIG. 5A, the method for obtaining a location may include transmitting location information as a fixed location information transmission signal in the same band or manner as GNSS (S231), detecting location information as a fixed location information transmission signal (S232), and Obtaining location information based on the fixed location information received signal (S230).

When at least one fixed position information transmission signal is detected, a transmission frame is extracted from the detected at least one fixed position information transmission signal. Information included in the extracted transmission frame is obtained as the location information.

When a plurality of fixed position information transmission signals are detected, a signal having the strongest signal among the plurality of fixed position information transmission signals detected may be selected, and the position information may be obtained from the selected signal. Alternatively, location information may be obtained from the plurality of detected fixed location information transmission signals, and a final location may be calculated in proportion to the received signal sizes of the obtained location information. That is, the magnitude of the received signal becomes smaller as the distance between the transmitter and the receiver increases, so that a relative distance difference between the transmitter and the receiver can be obtained according to the signal sizes of the plurality of fixed location information transmission signals. To calculate the final position.

5B is a flowchart illustrating a location obtaining method according to another exemplary embodiment of the present invention.

Referring to FIG. 5B, it is possible to know a process of integrally obtaining a position from fixed and floating position information.

In the code signal detection step S310, the code signal is detected by the fixed code and the floating code, respectively, and the detected signal is the fixed position information receiving step S311, and the floating code is the GNSS information receiving step S314.

In the fixed location information receiving step S311, the transmitted location information is received, and if there is additional information, the additional information is continuously received in the additional information receiving step S312. In the fixed position calculation step (S313), the position is calculated as in the method described in FIG. 5A.

When the detected code is floating, the orbital information and time information transmitted by the GNSS satellite may be received in the GNSS reception step S314, and the location calculation may be performed using the plurality of GNSS satellite information in the GNSS location calculation step S315.

When the position calculation is generated only by a fixed or floating one, only one calculated position can be selected in the integrated position calculation step (S316). However, when there are results of position calculation in both fixed and floating, one of the two results can be selected or a new position calculation corrected from the two results can be provided.

6 is a diagram illustrating a location-based service system according to an exemplary embodiment. Degree At 6, structures (eg, buildings) are shown in hexahedral form. And roads are shown between the structures.

For example, it is assumed that the fixed location information transmitting device 300 is installed in the first to third structures B1 to B3. When the mobile location information receiving device 400 moves along the road, as the mobile location information receiving device 400 approaches the first structure B1, the location information LI and the additional information are received from the first structure B1. (AI) is received.

For example, the additional information AI may include information indicating whether the first structure B1 is a residential structure, a commercial structure, an industrial structure, a recreational structure, a dangerous structure, a restricted access structure, a child protection area, or a tourist structure. It may include.

When the first structure B1 is a residential structure, the additional information AI may further include occupant information of the first structure B1.

If the first structure B1 is a commercial structure, an industrial structure, or a recreational structure, the additional information AI includes the name, service type, price, product information, representative information, contact information, etc. of the first structure B1. can do.

When the first structure B1 is a dangerous structure, a restricted access structure, or a child protection area, the additional information AI may include a warning message.

When the first structure B1 is a tourist structure, the additional information AI may include guide information about the first structure B1.

When the mobile position information receiving apparatus moves from the first structure B1 to the second structure B2, the position information LI and the additional information AI are received from the second structure B2. As the mobile position information receiving apparatus moves from the second structure B2 to the third structure B3, the position information LI and the additional information AI are received from the third structure B3.

When the mobile location information receiving device moves, if the mobile device maintains the same location for a predetermined time or more, location information and additional information about the location may be automatically stored. Through such stored information, a location-based service that can always check the information about the place he visited can be provided.

As another example, the fixed location information transmitting device 300 may be installed on a feature that is not a structure. In this case, the additional information (AI) may include information about whether it is a dangerous area, a tourist area, or an access attention area.

7 illustrates a location based service system according to another exemplary embodiment of the present invention. By way of example, an internal cross section of a building having first to fourth floors 4F to 4F is shown. For example, it is assumed that the fixed position information transmitting apparatus 300 is provided in each of the first floors 1F to 4F.

As the mobile location information transmitting device 400 enters the first floor 1F, the location information LI and the additional information AI are received from the first floor 1F. For example, the additional information AI may include information indicating whether the first floor 1F is a commercial district, an industrial district, a residential district, or a dangerous district.

When the first floor (1F) is a commercial district, the additional information (AI) may include information about the products sold on the first floor (1F), information about the service, contact information, directions, guide staff information, and the like. have.

When the first floor (1F) is an industrial district, the additional information (AI) includes information on the goods being produced in the first floor (1F), information on risk factors, information on stock, information on parts supply and demand, It can include information about employees.

When the first floor 1F is a residential district, the additional information AI may include information about residents living in the first floor 1F, information on security personnel, and the like.

When the first layer 1F is a danger zone, the additional information AI may include a warning message.

As the mobile location information receiving apparatus 400 enters one of the first to fourth floors 1F to 4F, the mobile location information receiving apparatus 400 receives the location information LI and the additional information AI from the corresponding floor. ) Can be received.

In the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope and spirit of the present invention. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the claims equivalent to the claims of the present invention as well as the claims of the following.

200; Floating position information transmitter
300; Fixed location information transmitter
400; Mobile location information receiver

Claims (15)

In the method for obtaining location information,
Transmitting the fixed location information based on the same frequency band and the same manner as the GNSS in asynchronous manner with the Global Navigation Satellite System (GNSS);
Detecting the transmitted fixed location information transmission signal based on the same demodulation scheme as the GNSS; And
And obtaining the position information from the detected fixed position information transmission signal. The method according to claim 1,
And the fixed position information transmission signal is transmitted from a fixed source fixed to the ground, and the fixed sources are not synchronized with each other. The method according to claim 1,
When a plurality of fixed position information transmission signals are detected,
Among the plurality of fixed position information transmission signals detected, a signal having the strongest signal is selected, and the position information is obtained from the selected signal,
Position information is respectively obtained from the detected plurality of fixed position information transmission signals, and the obtained position information is In proportion to the size of the received signal Location information acquisition method selected as the final location information. The method according to claim 1,
Detecting a floating position information transmission signal,
When the floating position information transmission signal is detected more than a certain number, the trajectory information, the time information of the sources of the detected floating position information transmission signals are extracted from the detected floating position information transmission signals, and the extraction And obtaining second position information based on the received trajectory information and time information. The method of claim 4, wherein
The position information extracted from the fixed position information transmission signal is compared with the second position information extracted from the floating position information transmission signal to compensate for the second position information extracted from the floating position information transmission signal. Location information acquisition method. A controller configured to store location information;
A data processor configured to receive the location information from the controller and to frame the received location information to generate transmission information;
Receiving the transmission information from the data processor, receiving modulation information from the controller, and converting the received transmission information according to the received modulation information based on the same modulation scheme as GNSS. A baseband modulator configured to baseband modulate to generate a baseband signal;
A carrier modulator configured to receive the baseband signal from the baseband modulator, and generate a transmission signal by carrier modulating the received baseband signal in the same frequency band as a GNSS; And
And an antenna configured to receive the transmission signal from the carrier modulator and to transmit the received transmission signal. The method of claim 6,
Position information transmitted by the baseband modulator using the same code Fixed position information transmission device configured to spread spectrum modulation. The method according to claim 6,
The carrier modulator and the antenna is a fixed position information transmitting device for transmitting at a low power level of noise so as not to disturb the reception of the existing GNSS signal. An antenna for outputting a received signal;
An amplifier configured to amplify the received signal to produce an amplified signal;
A carrier demodulator configured to carrier demodulate the amplified signal to generate a demodulated signal;
From the demodulation signal A signal processor configured to extract received information for each assigned code; And
And a position calculator configured to obtain position information from the received information. 10. The method of claim 9,
And the signal processor is configured to extract each code phase for each of a plurality of received signals using the same code to detect a plurality of received information at the same time. The method of claim 9,
The signal processor uses a plurality of assigned codes to simultaneously detect not only fixed position information but also transmitted signals from GNSS floating satellites. Mobile location information receiving device is configured. A fixed transmitter for transmitting the fixed location information based on the same frequency band and the same scheme as the GNSS in asynchronous manner with a Global Navigation Satellite System (GNSS); And
And a mobile receiver for detecting the transmitted fixed position information transmission signal based on the same demodulation scheme as the GNSS.
The mobile receiving apparatus obtains the position information from the detected fixed position information transmission signal,
The location information includes coordinate information expressed in latitude and longitude, or information directly expressing a location such as an address, place name, building name, and store name. The method of claim 12,
The stationary transmitter further transmits additional information such as advertisements and notifications at the same time. The method of claim 13,
And the mobile receiving apparatus acquires the additional information transmitted in addition to the location information after successfully detecting the location information. The method of claim 14,
The mobile receiving device is a location-based service system for automatically storing the location information and the additional information when the location information is maintained for a predetermined time.

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